"Environment Impact Assessment (EIA) Report on"
EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Environment Impact Assessment (EIA) Report on 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project of Chenzhou Qiaodan Chemical Industry Co., Ltd (Submitted for Approval) Hunan International Engineering Consulting Center December, 2008 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 75t/h Gas-making Waste Fluidized Mixed-combustion Furnace Project name Remaining Heat Utilization and 40×104 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project Project owner Chenzhou Qiaodan Chemical Industry Co., Ltd EIA undertaker Hunan International Engineering Consulting Center Legal Kuang Zhushu representative Floor 2 of Building of International Business Center, 1139# Section 1 Address of Dongerhuan Road, Changsha City Tel 0731-4517845 Fax 0731-4517845 Verified by Zeng Fanyong Examined by Mo Jianyan HPZC Certificate No.0003364 Compiled by Zhao Weihua HPZC Certificate No.B27310009 Zheng Qingli HPZC Certificate No.B27310008 Pan Xubing HPZC Certificate No.B27310013 Persons participating Su Feng, Zhang Lingli in EIA EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Content 1. Summary...................................................................................................................1 1.1 Origin of task assignment ................................................................................................ 1 1.2 Basis for the report........................................................................................................... 2 1.3 Purposes........................................................................................................................... 4 1.4 Grades of the Assessment ................................................................................................ 5 1.5 Assessment scale.............................................................................................................. 6 1.6 Environmental Protection Target..................................................................................... 6 1.7 Assessment Standards...................................................................................................... 7 1.8 Key points of assessment work..................................................................................... 10 2.General information about the region .................................................................. 11 2.1 General information about natural environment ........................................................... 11 2.2 Information about social environment ........................................................................... 13 3. Information about current project and project in progress ..............................14 3.1 Current project ............................................................................................................... 14 3.2 Current project situation ................................................................................................ 29 4. Analysis of the planned project for construction ................................................40 4.1 General information ...................................................................................................... 40 4.2 Project location, layout and main buildings and structures ........................................... 44 4.3 Public utilities ................................................................................................................ 45 4.4 Remaining heat utilization project of gas-making 3 waste fluidized mixed-combustion furnace ................................................................................................................................. 48 4.5 Soda ash CO2 multipurpose utilization emission reduction project............................... 53 4.6 Treatment measure and plan for environmental protection ........................................... 64 4.7 Analysis of change of pollutant discharge quantities before and after technical transformation...................................................................................................................... 68 5 Investigation and assessment of actuality of environmental quality..................71 5.1 Regional pollution source .............................................................................................. 71 5.2 Investigation and assessment of actuality of environmental air quality ........................ 71 5.3 Investigation and assessment of actuality of water environmental quality.................... 76 5.4 Investigation and assessment of acoustic environment actuality................................... 78 6 Analysis and prediction of environmental impact ...............................................79 6.1 Analysis of environmental impact during the construction ........................................... 79 6.2 Analysis of environmental impact during the operation................................................ 81 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 7 Analysis of clean production ..................................................................................89 7.1 Requirement of clean production................................................................................... 89 7.2 Analysis of advanced technology .................................................................................. 89 7.3 Analysis of energy saving and emission reduction........................................................ 90 7.4 Analysis of pollutant discharge...................................................................................... 90 8. Evaluation of environment risk ............................................................................91 8.1 Grade and content of environment risk evaluation ........................................................ 91 8.2 Analysis of source item.................................................................................................. 91 8.3 Result Prediction and Analysis of Liquid Ammonia Leakage....................................... 95 8.4 Risk control.................................................................................................................. 102 9 Public Participation .............................................................................................. 111 9.1 Purpose of Public Participation.................................................................................... 111 9.2 Summary and Analysis of Survey Result .................................................................... 118 9.3 Summary...................................................................................................................... 119 10 Feasibility Analysis of Project Construction ....................................................121 10.1 Industrial Policy Analysis.......................................................................................... 121 10.2 Analysis for Total Quantity Control of Pollutants ..................................................... 121 10.3 Feasibility Analysis of Construction Site Selection................................................... 122 11 Environment Management and Monitoring Plan............................................124 11.1 Environment Management......................................................................................... 124 11.2 Environment Monitoring ........................................................................................... 125 12 Benefits and Loss Analysis for Environment and Economy ...........................127 12.1 Economic Benefit Analysis ....................................................................................... 127 12.2 Social Benefit Analysis.............................................................................................. 127 12.3 Environmental Benefit Analysis ................................................................................ 127 13 Conclusions and Suggestions .............................................................................130 13.1 Conclusions................................................................................................................ 130 13.2 Suggestions ................................................................................................................ 134 Appendix 1: Letter of Authorization for Working out EIA Report Appendix 2: Execution Standards of EIA Report Appendix 3: Experts' Evaluation opinions on EIA Report Appendix 4: Geographic Location of Project Site EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 1. Summary 1.1 Origin of task assignment Chenzhou Qiaodan Chemical Industry Co., Ltd (abbreviated as “Qiaodan Company”), 77.6% of its shares are held by Xiangnong Agricultural Means of Production Group (abbreviated as“ Xiangnong Group”). Qiaodan Company is located at Qiaokou Town, 23 km away from Chenzhou City. It is adjacent to Beijing-Guangzhou Railway Line and Beijing-Zhuhai Expressway. The company is 20km away from 107 national highway and 200m away from Dongjiang River. Its floor area and building area are 200,800 m2 and 150,000 m2 respectively. The number of staff members are 829, with 195 professional engineers and technicians. Qiaodan Company was built in 1966. With 40 years’ development, it has experienced a great change and become one of the key enterprises in Chenzhou City. At first, it produced only synthetic ammonia with 5000t annually, while currently the production volume of urea and synthetic ammonia are 130,000t/a and 80,000t/a respectively. Qiaodan Company decides to implement the “75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization, 400000 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project”. There are two purposes for the project. One is to make full use of the residule heat from the synthetic ammonia gas-making blow wind gas and gas-making slag to obtain industrial-used steam; the other is to fully make use of the carbon dioxide produced by synthetic ammonia to make soda and ammonium chloride, then upgrade the industrial structure and reduce energy consumption and emission. According to the Regulations on the Administration of Environmental Protection of Construction Projects and the Law of the People's Republic of China on Environmental Impact Assessment, Chenzhou Qiaodan Chemical Industry Co., Ltd entrusts Hunan International Engineering Consulting Center to evaluate the “75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization, 400000 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project”. After the acception of the assignment, the project group was formed quikly. In accordance with the Regulations on EIA Technical Guidance, the report is worked 1 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project out on the basis of the site survey for current projects and ambient environment, data analysis and assessment of the environment quality. 1.2 Basis for the report 1.2.1 Laws and regulations about environmental protection a) Environmental Protection Law of the People’s Republic of China (December 26, 1989); b) Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution (Amended April 29, 2000); c) The Amended Draft Law of the People’s Republic of China on the Prevention and Control of Water Pollution (September 5, 2007)； d) Law of the People's Republic of China on Prevention and Control of Pollution from Environmental Noise (November 29, 1996); e) Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Waste solid (Amended December 29, 2004); f) Law of the People's Republic of China on Environmental Impact Assessment (November 28, 2002); g) Law of the Peoples Republic of China on Promotion of Cleaner Production (June 29, 2002); h) Production Safety Law of the People's Republic of China Order of the President of the People's Republic of China [No.70]; i) Regulations on the Administration of Construction Project Environmental Protection (Promulgated by Decree No. 253 of the State Council of the People's Republic of China) November 29, 1998; j) List of Classification of the Construction Project Management of Environmental Impact Assessment, December, 2008; k) Suggestions on Intensifying Water Saving (State Economic and Trade Commission, State Environmental Protection Agency and other ministries); l) Official Reply of the State Council Concerning Acid Rain Control Areas and Sulphur Dioxide Pollution Control (Guo Han  No. 5); 2 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project m) 11th Five-year Plan of the Chemical Industry; n) Notice on the Management of the Chemical Hazard (State Environmental Protection Agency and other 4 ministries); o) Regulations of the PRC on the Administration of the Controlled Chemicals (State Environmental Protection Agency and other 4 ministries); p) Amended Regulations of Hunan Province on Environmental Protection May 1, 2002; r) 11th Five-year Program of Environmental Protection of Hunan Province; s) Environmental Functional Division of the Main Water System in Hunan Province (DB43/023-2005); t) Urban Master Planning of Chenzhou City (1995-2015); u) Regulations on Safety Administration of Hazardous Chemicals (Promulgated by Decree No. 344 of the State Council of the People's Republic of China) March 15, 2002; v) Principle of Storage for Ordinary Hazardous Chemicals (GB15603-1995); w) List of National Hazardous Waste (Decree No.1 of the State Environmental Protection Agency and National Development and Reform Commission); x) Assessment Indicator system of the Clean Production for Soda Ash (trial implementation) National Development and Reform Commission Notice No.41; 1.2.2 Technology Guidance a)Technical guidelines for environmental impact assessment-General principles HJ/T2.1—1993； b)Technical guidelines for environmental impact assessment-Atmospheric Environment HJ/T2.2—1993; c)Technical guidelines for environmental impact assessment-Water Environment HJ/T2.3—1993; d)Technical guidelines for environmental impact assessment-Acoustic Environment HJ/T2.4—1995; e)Technical Guidelines for Environmental Impact Assessment of 3 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Construction Project of HJ/T169-2004； f)The Guidelines for Environmental Impact Assessment of Petrochemical Industry Construction； g)The Interim Measures for Public Participation in the Environmental Impact Assessment (March 18, 2006); 1.2.3 Documents a) The feasibility report of Chenzhou Qiaodan Chemical Industry Co., Ltd is entrusted to Hunan International Engineering Consulting Center to assess the 75t/h Gas-making 3-Waste Fluidized Mixed-combusiton Furnace Residual Heat Utilization, 400000 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project (Hunan International Engeneering Consulting Center) b) Power of Attorney on The Environmental Assessmenyt (Chenzhou Qiaodan Chemical Industry Co., Ltd) 1.3 Purposes a) After the investigation and assessment of the general situation of the production system, 3-waste discharge and pollution-reducing condition, the main environmental problems can be found. The basic statistics are provided, which are beneficial to the analysis of the environmental protection possibility. The aim is to achieve a good situation in whole, and win the success of reducing pollution with the increased output. b) By investigating the natural and social environment of evaluated area, the main protection target can be locked. Through the site survey and data collection of the air, water, and noise there, the current situation of the ambient environment quality will be clear. c) Through project analysis and the investigation among the similar projects, the pollution source, pollutants, concentration of emission, the dischrage ways and emission rule will be found out. Based on the prediction for the scale and degree of the effect caused by the planned-project, the environmental feasibiliby of the project construction can be verifid. Then, the related measures against the environmental 4 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project pollution can be worked out. Meamwhile, the Environmental Protection Bureau will make decisions easier based on the above. 1.4 Grades of the Assessment 1.4.1 Air Assessment The main air pollution of the planned project is the gas-making 3-waste fluidized mixed-combustion furnace residual gas and other kinds of residual gas produced from the soda ash production. The details are as follows: Mixed-combustion furnace residual gas: This kind of waste is caused by the gas-making process, the amount of which is 140455Nm3/h. SO2, fume ash and dust are the main pollutants. The mixed-combustion furnace waste is discharged after being processed by the packing bag. 99.86% of the fume ash and dust is absorbed. The residual waste is discharged through the 100m chimney. The SO2, fume ash and dust are discharged with 28.13kg/h, 6.88kg/h respectively. The other wastes produced by the soda ash production process include: the residual gas in the drying ammonia furnace, carbonized filtered gas, soda ash end gas, and carbonized washing end gas. All those wastes include a little NH3 or dust. The emission amount of ammonia and dust is 18.25 and 2.85 kg/h. According to the division principle in Technical guidelines for environmental impact assessment-Atmospheric Environment HJ/T2.2—1993, and the characteristics of the project, SO2, PM10, NH3 are chosen to calculate the standard mission amount. Qi Pi = 109 COi Pi ——the standard emission amount m3/ h Qi ——the emission amount of the unit time t/ h Coi——ambient air quality standard mg/m3 On calculating, the supporting evidences for the air assessment refer to Tab. 1-1 Tab. 1-1 The Grade Division Table for the Air Assessment Items SO2 PM10 NH3 The emission amount of pollutants t/h 28.13×10-3 2.85×10-3 18.25×10-3 Ambient air quality standard mg/m3 0.5 0.5 0.2 The standard emission amount m3/ h 5.6×107 5.7×106 9.2×107 5 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Terrain Foothill The Assessment Grade Grade III 1.4.2 Assessment of the water The effective ingredients of the NaCl will be greatly improved, because the raw salt will be used in the soda ash production. The filter system and distillation apparatus are applied in the production system, so the clean production will be achieved. There are only a little rinsing water sewage from the recycling system and domestic sewage. The total amount is 25.5 m3/ h. There is waste water in the mixed-combustion furnace, with the maximum amount of 2m3/h. The waste water includes the following ingredients: CODcr, 300mg/L, BOD5250mg/L, SS 300~400mg/L. The waste water will be transformed into the terminal sewage treatment device, then to the recycling system. “No Discharge” can be achieved. The grade of the water assessment is Grade III. 1.4.3 Acoustic Environment Assessment In this project, the noise will mainly come from the Fan, Drought Fan and Water Pump. Because of the strict control to the choice of the equipment, the noise intensity of the equipment is 85~95dB (A). Besides, all the equipment will be installed inside the factory. There is almost no effect to the outside. According to the division principle of HJ/T2.4-93, the acoustic assessment is the Grade III. 1.5 Assessment scale 1.5.1 Assessment scale of the air environment Assessment scale is 16km2. It is a rectangle, whose line is 4km. The mix-burning furnace chimney is regarded as its center, and the prevailing wind direction as its principle axis. 1.5.2 Assessment scale of the water environment The assessment length of the Dongjiang River is 5.5km. It takes “Qiaodan Company” as the beginning point, and covers the area from upstream 500m to downstream 5000m. 1.5.3 Assessment scale of the acoustic environment The construction location of the planned project will be in current production area of “Qiaodan Company”. The assessment scale is less than 100m beyond the company site. 1.6 Environmental Protection Target 6 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Environmental Protection Target refers to Tab. 1-2 Tab. 1-2 the Environmental Protection Target List Protection Location and distance Protection Category Scale target from the project site grade Living area of 7 buildings On the south of Qiaodan with 108 planned project site Company households About 200-500m About On the northwest of Longwan Environment 1000 planned project site Village Grade 2 air people About 1200m About On the east of planned Qiaokou Town 6000 project site people About 1700m Evaluated river On the north of Surface section of GB3838-2002 Zhonghe planned project site water Dongjiang Grade III About 200m River Living area of 7 buildings On the south of Acoustic Qiaodan GB3096—93 with 108 planned project site environment Company’s Grade 3 households About 200-500m staff members Note: Evaluated river section of Dongjiang River of this project has no water intakes. The nearest water intakes for human drinking water are the Wulipai Town Intake, which is from the project draining outlet and is on the downstream of it. 1.7 Assessment Standards According to the reply issued by the Environmental Protection Bureau, the assessment standards will be as follows: 1.7.1 Environment Quality Standards Ambient Air: the air environment will adopt the Grade II of the ambient air quality standard GB3095-96. NH3, H2S will adopt Hygienic Standards for the Design of Industrial EnterprisesTJ36-79, that is the maximum allowable concentration of the hazardous substances in residential area. Water Environment: Qiaokou section of the Dongjiang River will follow the Grade III standard of GHZBl GB3838-2002. Acoustic Environment: to implement the Grade II standard of Acoustic Quality 7 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Standard GB3096-2008. 1.7.2 Pollutant dischrge standards a) Waste water: Sewage discharge shall adopt List 2 Medium-sized Enterprise Standard in GB 13458-2001 of Water Pollutant Discharge Standards for Synthetic Ammonia Industy; b) Waste gas: Ambient air pollutant discharge shall adopt Grade II Sandard in GB 16297-1996 of Ambient Air Pollutan Discharge Standards ; Boiler Ambient air pollutant discharge shall adopt Grade II Area Time II Standard in GB 13271-2001 of Boiler Ambient Air Pollutan Discharge Standards ; NH3 adopts Grade II Area Newly-built and Expansion Project Time Section Standard in GB 14554-93 of Fetor Pollutan Discharge Standards. c) Noise: adopts Grade II Standard in GB12348-1990 of Industrial Enterprise Factory Boundary Noise Standards; Construction site noise adopts GB12523-1990 of Constyruction Site Boundary Noise Limited Standards. d) Waste solid: Ordinary industrial waste solid adopts GB18599-2001 Pollution Control Stanard of Ordinary Industrial Solid Wsate Storage and Disposal Site; Dangerous waste adopts GB18598-2001 Pollution Control Stanard of Dangerous Waste Landfill and GB18597-2001 Pollution Control Stanard of Danagerous Waste Storage. Environment Quality Standards and Pollutant Dischrge Standards refer to Tab. 1-3 and Tab. 1-4 Tab. 1-3 Environment Quality Evaluation Standards Factor of Standard name and grade Item Standard index Environ pH 6～9 COD ≤20mg/L NH3-N ≤1.0mg/L Surface Water Environment Surface water Quality Standards Petroleum ≤0.05mg/L (GB3838-2002) Grade Ⅲ Cyanide ≤0.2mg/L Phenol ≤0.005mg/L Sulfide ≤0.2mg/L 8 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Daily average ≤0.30 TSP mg/Nm3 Daily average ≤0.15 PM10 mg/Nm3 1hour averaged ≤0.50 Ambient Air Quality Standards mg/Nm3 Ambient air SO2 (GB3095-1996) Grade II Daily average ≤0.15 mg/Nm3 1hour averaged ≤0.24 mg/Nm3 NO2 Daily average ≤0.12 mg/Nm3 Industrial Enterprise Design Hygiene 1hour averaged ≤0.20 NH3 Standard mg/Nm3 Ambient air (TJ36-79) Max/ thickness of 1hour averaged ≤0.01 H2S residential area mg/Nm3 Acoustic Environment Quality Equivalent Acoustic Day 60dB (A) Standard Sound Environment Night 50dB (A) GB3096-2008 Grade II level Leq Tab. 1–4 Pollutant Dischrge Standards Standard index Pollutant Standard name and grade Pollutant factor Medium sized enterprise pH 6-9 COD ≤150mg/L Water Pollutant Discharge Standards SS ≤100mg/L for Synthetic Ammonia Industy; Waste NH3-N ≤70mg/L water (GB13458－2001) Cyanide ≤1.0mg/L List 2 Medium sized enterprise Sulfide ≤0.5mg/L Phenol ≤0.1mg/L Petroleum ≤5.0mg/L Waste Unorganized Max. thickness of outside of gas discharge boundary 12 mg/m3 Ambient Air Pollutan Integrated methanol Discharge Standards( GB16297-1996) List 2 Unorganized Max. thickness of outside of Grade II discharge dust boundary 1.0mg/m3 Max. discharge thickness Methanol allowed 190mg/m3 Fetor Pollutan Discharge Standards. NH3 Factory boundary1.5mg/m3 (GB14554-93) Tab.1 9 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Standard index Pollutant Standard name and grade Pollutant factor Medium sized enterprise Grade II Area Time II Standard in Soot 200mg/m3 Boiler Ambient Air Pollutan Discharge Standards SO2 900mg/m3 Class 2 of Industrial Enterprise Day 60dB (A) Noise Factory Boundary Noise Standards Noise Night 50dB (A) GB1234-2008 1.8 Key points of assessment work Key points of assessment work: Current pollution source survey, project analysis, 3 accountings analysis, pollution treatment measures and standard discharge achieving analysis of the enterprise. 10 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 2.General information about the region 2.1 General information about natural environment 2.1.1 Geographical location The planned project site is located in the plant area of Qiaodan Company, on the south bank of Dongjiang River, Qiaokou Town, suburb of Chenzhou City, 2km away from Qiaokou Town, 3km from Qiaokou Railway Station, 23 km from downtown area of Chenzhou City, with Chenzhou-Sandu Railway Line and Chenzhou-Zixing Highway running through the south part of the plant area. Special railway line and cargo transport road link the plant, enjoying convenient transportation. 2.1.2 Topography and land features The geological condition of the project used land belong to limestone area. The stratum of the area from upper to bottom is backfill earth, silt soil or cultivated soil, powder clay mixed with cobble (alleviation), powder clay mixed with gravel (proluvial). The thickness of powder clay and clay mixed with gravel is above 20m. On the bottom it has limestone mixed with mud limestone and calcium limestone in Shidengzi section of Carboniferous System. Except for upper part cultivated soil and silt soil, the rock and earth physical property is better. It is an ideal used as construction site. The current production area has landform combined flat slope with ladder form. In the middle part, it has formed 3 steps, with elevation of 159m，163m and 166m respectively. The project will be built on the east side of current production area and partial residential land. The land on the east side is a mountain slope, with hillside from east to west about gradient 15 . The used land is a strip form in the direction from south to north. On the north end is Dongjiang River. 2.1.3 Geology and soil This region belongs to Nanling hollow structure corrode-cut middle and low mountain area. The rock formation type is settled layer. The exposed stratum mainly includes Quaternary System of Cainozoic Group, Kreide Group of Secondary System, Secondary Tip Group of Antediluvian and Caboniferous System. Quaternary System of Cainozoic Group is mainly distributed along both banks of Dongjiang River, forming Grade 1 terrace, steam valley and wide valley flatland of different scale, where is the main farming land area. Kreide Group of Secondary System is irregularly covered above Secondary Fold and Jurassic System. Longtan Group of Shangtong is 11 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project the key coal contained stratum of the region. Zimenqiao group of Caboniferous System is dark crystal dolomite and crystal limestone. The region geological structure is mainly controlled by structure of Cathaysoid Tectonic System. The rock trend is north east. Gradient layer including surface soil has max thickness about 100m. Bedrock depth is about 60m, without cave and underground river within rock depth 100m. Rock structure is comparatively complete. In modern history, it has no earthquake. Intensity of earthquake is Degree 6. Acceleration value of basic earthquake in design is 0.05g. Main soils in the area include: sandstone, red soil and yellow-red soil bred from C-horizon shale distributed in the mountain land and dry farming land, taking red sandstone clay as the mainstay. There are fertility paddy field and latent fertility paddy soil distributed in proluvial ridge and bottom land, and also river tide soil formed by alluvium of Dongjiang River and garden soil distributed in suburb formed by C-horizon shale. Clay of the mountain slope is dense and dry, with broomy vegetation, without bad developed geological situation, provided better foundation condition for the civil works. Hydrological geology condition is simple and the soil layer has a certain permeability of water. Underground water has decomposed corrode. 2.1.4 Climate Located in central subtropical zone, the project site has a continental wet monsoon climate, with distinct 4 seasons and plentiful rain. Its annual temperature averages 18.1 , annual precipitation 1576.7mm. In spring it has plentiful rain, but In Summer it has concentrated rainfall. In autumn and winter, it is dry and seldom rains. Permanent wind is from the north and the dominant wind frequency is 14.6%. In a year, the dominant wind in spring, autumn and winter is from north. North wind frequency is 12.8%, 20.4%, 27.2% respectively. Summer dominant wind is from south with frequency 15.6%, Annual averaged wind speed is 1.2m/s. Static wind frequency averaged 47.4$. Sunshine time 1617 hours, frost-free period 280 days, 2.1.5 Hydrology Waters of the project is adjacent to Dongjiang River, with flow rate regulated by upper stream Dongjiang reservoir. Permanent flow is 210m3/s, dry season flow 90m3/s. The max. high water temperature in summer is 19 ，and the min. water temperature in winter is 9 . The water level is controlled by down-stream Huangnitan Resolver. 12 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Qiandan Company section is located in the tail part of Huangnitan Hydro-power Station Reservoir. Huangnitan Hydro-power Station Reservoir is at the 9km place, downstream of sewage draining exit of the project site as a runoff daily regulated reservoir with normal water level 125m. The planned waterway is Grade 4 and can navigate 30~50t cargo ship. Upper reaches is Zixing urban district and Dongjiang Hydro-power Station The nearest water intake for life is located in Wulipai Town Water Intake, 15km from Qiaodan Company Section, at the downstream. 2.2 Information about social environment Chenzhou City is situated in north part of Nanling Mountain, enjoying abundant natural resources, developed forest and farming industry, convenient transportation, complete industry fields. Chenzhou is the backbone hydro-power and coal production base of Hunan province. The project site is located in Qiaokou Town, Suxian District of Chenzhou City Qiaokou Town is on the northeast part of Chenzhou City. On the east and the north there are Liyujiang Town, Muyinqiao Township and Gaoma Township. On the south it links Bailutang Town and Tangxi Township. On the northwest it intersects with Wulipai Township across the river. On the southwest it intersects with Xujiadong Town of Suxian Disrtrict. Zixing-Xuchang Railway Line and Chenzhou-Zixing high grade highway run through the Town from east to west. Dongjiang River is running through the Town. The mineral resources include lead, zinc, brown iron, bare iron, manganese etc. It has better agriculture foundation as one of the commodity grain bases and fast-growing forest bases. The town covers an area of 126.77 km2, including 20524 Chinese mu of cultivated land, 17478 mu of paddy field. Under its jurisdiction are 15 villages with 4173 households and population of 17858. In the territory, there are Chenzhou Municipal Farming Science Institute and Chenzhou Agriculture School etc. 13 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 3. Information about current project and project in progress 3.1 Current project Chenzhou Qiaodan Chemical Industry Co., Ltd (abbreviated as “Qiaodan Company” ) is a limited company, with largest shares held by Xiangnong Agricultural Means of Production Group (abbreviated as“ Xiangnong Group” ). Qiaodan Company is located at Qiaokou Town, 23 km away from Chenzhou City. Covering an area of 200,800 m2, floor space is 150,000 m2, with 829 saff members and workers including 195 professional engineers and technicians, 3 senior engineers, 48 middle rank engineers. Since Sept. 2005, the company has been focusing on the production for superior products, the energy-saving and comsuption reduction, paying great attention to the construction of Respectful and Harmony Enterprise. By conducting secondary annual overhaul and streanthening management, the enterprise has made great progress and improvement on the production capacity, thus stepping into a sound development orbit. 3.1.1 Information about current production Current synthetic ammonia and urea production scale designed of Qiaodan Company is 80000t/a and 130000t/a, referring to Tab. 3-1 Tab. 3–1 Present production scale of main products Designed production Actual scale Product name scale Remark t/a t/a 77338.50 2006 Synthetic ammonia 80000 80229.14 2007 122543.01 2006 Urea 130000 126956.38 2007 Based on methanol 2943.94 2006 Methanol and ammonia ratio 3288.59 2007 3.1.2 Current main production equipment Main production equipment for synthetic ammonia refers to Tab. 3-2; Main production equipment for urea refers to Tab. 3-3 14 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 3-2 Main Equipments List Workshop No. Equipment Name Specification Unit Qty. Remark Section Furnace in fluid 20t/h set 1 bed 1 Boiler Circulating fluidized set 75t/h 1 bed boiler Extrusion device set 2 Raw material MBJ210,Q=4000kg/h 8 55kW of coal bridge DN2260 set 2 5.5kW Coal gas producer DN2400 set 13 5.5kW Wind chest V=5000m3 set 1 3 Gas-making 9-19-13N09D set 3 125kW Draught fan 9-19-11N09D set 3 125kW DN4200×10800 set 1 Scrubber tower DN3400 set 1 DN3000 set 1 Static de-coke device YD-6 1 D36/80-5000 set 2 Roots blower R604N 231m3/min set 4 280kW LG480 set 3 130kW DN2200 1 4 Decarbonization Thionizer DN1800 1 DN5300/DN4500 1 Regeneration tank DN4600/DN3800 1 IH200-150-315 2 45kW Desulphurization IH150-125-315 1 pump 6BA-8 2 22kW Mid-change set 5 Exchange DN3200×14000 1 furnace Low-change set DN3400/DN2600×18000 1 furnace DN2000×22735 set 1 Hot water tower DN1800×23882 1 DN1400×9585 F=497m2 set 1 Heat exchanger DN1300×9749 F=300m2 set 1 Heat-exchanger 100R set 3 50kW 15 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project pump 80R set 2 11kW L3.3-17/320 set 14 320kW Hydrogen-nitrogen 6 Compress M-73/314 3 1250kW compressor H224A-165/314 1 2500kW Decarburization set DN2600×36798 1 tower Stripping tower DN360×34600 set 1 Washer DN1600×21300 set 1 7 Decarburization Gas fan 9-19N011.2D set 2 45kW Roots blower L601 set 3 70kW Decarburization set 200D12×8 3 440kW pump Transducer set Desulphurization DN2400×17000 1 tower Transducer Transducer set 8 Desulphurization Desulphurization DN2400×15000 1 tower Desulphurization set 150D30×3 4 75kW pump Methyl alcohol set DN800×15770 1 synthetic reactor Methane tower DN800×15770 set 1 Water cooler F=200m2 set 2 9 Amitraz Circulating gas set F=196m2 2 heater Heat exchanger F=60m2 set 1 Circulator 2DZ8-2.3/120-140 set 3 180kW Rinse pump 3W-6BT2 set 2 37kW 10 Synthesis DN800×15683 set 1 Synthesizing tower DN600×11617 set 1 F=216m2 set 1 Cool exchanger F=81m2 set 1 DN1000 F=70m2 set 1 Waste heat boiler DN1600 F=46m2/35m2 set 1 F=240m2 set 1 Ammonia cooling device F=85m2 set 1 Circulating gas DN700 F=327m2 set 1 16 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project heater F=92m2 set 1 2DZ5.5-1.8-285/320 set 3 180kW Circulator 2DZ5.5-1.4-285/320 set 2 140kW 2Z2.4-0.8/285-320 set 1 95kW 8AS17 set 3 190 Ice maker LG20A200Z set 2 250 11 Refrigeration Liquid ammonia set storage tank V=100m3 4 Burning furnace DN5200 set 1 Cyclone separator DN4000 set 1 Waste heat boiler Q42/950-15-1-27/280 set 1 The recycle of Soft water heater set 1 12 blow wind gas Air remaining set 1 heater Fan 9-26 7.1D set 2 75kW Draught fan Y4-37 16D set 1 110kW Tab3-3 Main Equipments List (follow the Tab3-2) No. Workshop Device name Qty. 1 Synthesis DN1200 urea synthetic tower system, V=20m3 2 2 CO2 compress M-56/20.6 CO2compressor710kW 2 3 20m /h ammonia pump 132kW 2 3 12m /h Primary methyl alcohol pump 90kW 2 3 High-pressure pump room 4m3/h diformazan pump 4kW 2 4m3/h aqua ammonia pump 4kW 2 DN1100 Section 1 Decompose tower system 1 DN700 Section 2 Decompose tower system 1 DN1100 Section 1 absorption tower system 1 4 Decompose evaporation Ammonia cooling device 3 DN1000 Section 1 evaporation separator 1 DN1200 Section 2 evaporation separator 1 DN9m pelleting tower system 2 5 Pelleting and packaging Urea package and storage system 1 3.1.3 The main raw and accessory material consumption 17 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project The main raw and accessory material consumption refers to Tab3-4 Tab.3-4 The main raw and accessory material consumption Unit consumption Annual consumption Material name Remark 2006 2007 2006 2007 1.623 1.351 125520 108390 Collating Raw coal (t/t (t/t (t/a) (t/a) mark ammonia) ammonia) 0.214 0.212 16550 17009 Collating Fuel coal (t/t (t/t (t/a) (t/a) mark ammonia) ammonia) Electricity 1838 1734 (Synthetic (kWh/t (kWh/t ammonia) ammonia) ammonia) 165108096 151628609 139 143 (kWh/a) (kWh/a) Electricity (kWh/t (kWh/t (urea) urea) ammonia) Current project used fuel coal and raw coal adopt the purchased coal of Qiaodan Company for thermo-power co-production project, with ingredient referring to Tab.3-5 and supply situation referring to Tab. 3-6. Tab.3–5 Ingredient analysis of current project used coal Max. Dry-based Dry-based Air Dry-based Dry-based Min. calorific sulfur ash Moisture Dry-based fixed volatile calorific value Item moisture carbon matter value % % % % % % Kj/kg Kj/kg Anthracite 0.87 29.64 8.67 1.38 61.29 13.02 20470 23210 Tab.3–6 Coal supply situation of current project No. Coal source Coal type Transport way 1 Hunan Xinsheng Coal Mine Anthracite Railway 2 Leiyang Yuda Energy Co., Ltd Anthracite Truck 3 Yongxing Zhengshan Coal Mine Anthracite Truck 4 Yongxing Zhenghong Coal Mine Anthracite Truck 5 Yongxing Jiedong Coal Mine Anthracite Truck 3.1.4 Public utilities of current project 188.8.131.52 Water supply and drainage a) Water supply: The living water of Qiaodan Company is from tap water company, and the 18 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project production used water is from Dongjiang River through pumping. On the bank of north side of the factory boundary, it is equipped with intake structures and water pre-treatment facilities. Water is supplied through first and secondary pumping house, with supply capacity 4680m3/h. There is one set of circulating cooling water supply system in the plant, with total water supply capacity of 5000m3/h. The supplemented water source is from Dongjiang River The water supply relation of current project may refer to Fig.3-1. b) Drainage The current drainage system is raining water and sewage confluence system. After the production waste water collected, it enters into sewage treatment station in the factory then circles to the system for use. The domestic sewage is discharged to Dongjiang River after treatment of the septic tank. 184.108.40.206 Power supply system The existed project has two transformer stations (35kV/6kV). One is a urea transformer station whose generation capacity is 16000kW and the other is a synthetic ammonia station whose generating capacity is 8500kW. They are supplied by Qiaokou substation and Xiuqiao substation respectively and their total generating capacity is 24500kW. There is a thermoelectric station in the plant whose generating capacity is 24000kW supplies power for the whole plant. 220.127.116.11 Heating system The heating system of the existed project please refer to Tab. 3-7 Tab. 3-7 List of heating system of the existed project Parameter Steam production Equipment Quantity Temperature capacity Pressure MPa t/h ℃ 75t/hcirculating fluid bed Boiler 1 3.82 450 75 Blowing gas recycling boiler 1 1.27 Saturation 15 Other byproduct steam (synthetic waste boiler and steam 15.4 production boiler) Total 105.4 19 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 3.1.5 Main production process of the existed project Synthetic ammonia production process, boiler operation process and urea production process and waste production process please refer to Fig. 3-2 and Fig. 3-3 and Fig. 3-3. 20 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Soft water inlet and Fire water outlet Decarb. 1000 gas cabinet Soft water, coal bar Pump room 1 Urea Cooling device 1000 gas cabinet 10~16# gas-making 5000 cabinet gas CO2 furnace making furnace compressor Pump Supercharge A-sys. Carbonization Sy. Cool gas 1#～8# 1#~7# C-sys. 8#9# Urea Centrifuge 9#～13# Office bld room 2 Desulfate M-cooler discharge Ｌ mach. Ｌ mach. gas de-S de-S gas fountain making making NH3 Dom. water HM machine Water Recycler Methanol st. abs. Cooler A Cooler cooler tank Pump room 2 filter Sewage treatment Fig. 3-1 Water supply of the existing project 21 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Synthesis Liq. NH3, de-urea device After gassing Fr gassing Fine gas Use NH3 Penetrating gas Tail gas H extraction S3 refine NH3 rerecovery water A2 S2 Pure gas A1 Fr gassing NH3 recovery Flash steam Recovered gas Conv. gas Desufate Decarbonization NH3 water Recovered gas Conversion De-urea device Blowing gas Semi-water gas Blowing gas recovery Desulfurization Gas making A3 Air release Coal, air, W1, S1 water and S4 Cutline: steam A: waste gas S: waste solid Soft coal Water Water Boiler User Steam Smoke Marble water film Chimney dust catcher A4 W2 S5 W3 S6 Fig. 3-2 Synthetic ammonia process and boiler process and pollutants production 22 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project desulfurize desulfurize compress S4 CO2 from desulfurize system CO2 CO2 CO2 Liquid ammonia Urea synthesis Am. storage Methylamine Surplus ammonia Liquid ammonia condense Mid pre Absorp Decompose Mid Pre A4：offgas release Decompose gas Absorption liquid Mid pre absorp absorption decompose Low pre Offgas Decomposing gas Condensating liquid desorption Urea liq. vaporation Desorp liquid hydrolyzed for reuse Evaporation condensation A5: Prilling tail gas Urea prilling Urea product Fig. 3-3 Urea process flow and pollutants production 23 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 3.1.6 Pollutants emission of the existed project 18.104.22.168 Waste gas emission Qiaodan Chemical Industry Co., Ltd is carrying out the thermoelectric project which includes two 75t/h circulating fluid beds boiler with a 12MW turboset respectively. The first stage of the project (a 75t/h circulating fluid bed boiler with a 12MW Draw-condensation type turboset accessory) has been accomplished. The second stage is to establish another 75t/h circulating fluid bed boiler with a 12MW Draw-condensation turboset accessory and make it work with the first stage project. The second stage hasn’t been started. Besides the established circulating fluid beds boiler, Qiaodan Chemical Industry Co., Ltd has a 15t/h surplus heat recycling boiler. Bleeding, Front gassing and 8 gas making blowing gas has been recycled in the 15t/h surplus heat recycling boiler but still waste gas from 8 gas making boiler has not. This environmental assessment collected the waste gas monitoring data in 2007 and got to know the waste gas emission of 75t/h circulating fluid bed boiler and 15t/h surplus heat recycling boiler. Please refer to Tab. 3-8. Tab. 3-8 Waste gas emission data in 2007 SO2 dust quantity Pollution source m3/h density quantity density quantity mg/m3 kg/h mg/m3 kg/h Existed surplus heat 50956 47.5 2.42 378.5 19.28 boiler(15t/h) A gas making boiler with 3049 934 2.85 72 0.22 unrecycled blowing gas Other waste gas emission please refers to Tab. 3-9 Tab. 3-9 Other waste gas emission Main waste emission Pollution Quantity Name of quantity Density remarks source Nm3/h the (kg/h) (mg/m3) pollutant Urea dust 6.0 30 Prilling tail gas 200000 60m from prilling tower ammonia 6.0 30 Absorption 1500 ammonia 0.57 379 30m from exhaust funnel tower tail gas 24 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project SO2 20.49 118.79 Boiler gas 172500 100 from chimney stack dust 8.04 46.6 22.214.171.124 Sewage discharge By utilizing the monitoring data of the sewage discharge in 2006 and 2007, this environmental assessment analyzes the sewage discharge of Qiaodan Chemical Industry Co., Ltd. Please refer to table 3-10 and Tab. 3-11. Tab. 3-10 Monitoring data of the sewage discharge in 2006 Unit: mg/L Volatile pH SS COD S2- NH3-N CN- oil hydroxybenzene density 8.50~8.84 48~53 55.9~145.8 0.002~0.003 123.9~160.8 6.38~6.88 0.09~0.29 0.001~0.010 (mg/m3) Mean concentration —— 51 91.2 0.003 139.2 6.68 0.21 0.007 3 (mg/m ) The rate of exceeding the 0 0 0 0 100 100 0 0 standard (%) Maxim times of exceeding the / / / / 1.3 5.9 / / standard Standard quantity 6~9 100 150 0.5 70 1 5 0.1 (mg/m3) Tab. 3-11 Monitoring data of the sewage discharge in 2007 Unit: mg/L Volatile pH SS COD S2- NH3-N CN- oil hydroxybenzene density 7.33~8.63 14 16.1~99.1 0.004L 95.3~100.0 4.80~5.35 0.21~0.40 0.002L (mg/m3) Mean —— 14 57.6 0.004 97.7 5.08 0.31 0.002 concentration(mg/m3) The rate of exceeding the standard 0 0 0 0 100 100 0 0 (%) Maxim times of exceeding the / / / / 0.4 4.4 / / standard Standard quantity 6~9 100 150 0.5 70 1 5 0.1 (mg/m3) Qiaodan Chemical Industry Co., Ltd. has been carrying out the “zero pollution” project since the end of 2006 and the monitoring point in 2006 is the main drain. 25 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Because it is the starting stage of the project, the recycling rate is not high and the water in and out of the sewage treatment facility can’t be balanced, and sometimes some mixed waste water is discharged into Dongjiang River. In 2007 the monitoring data is from the discharged mixed waste water. Seen from the data, the main pollutants of the sewage are ammonia nitrogen and cyanide whose rate of exceeding the standard is 100%. The existed treated sewage can meet the requirement of some process, but can’t be used in some process which needs high quality recycled water. Thus the water in and out of the sewage treatment facility can’t be balanced and some waste water is discharged into Dongjiang River. 126.96.36.199 Waste solid dispose The waste solid mainly comes from desulfuration, gas making boiler and thermoelectric station. The waste solids are desulfurizer residue, residue of gas making boiler and boiler cinder. Please refer to Tab. 3-12 Tab. 3-12 Waste solid source and pollutants Name of the waste solid Treatment Quantity(t/a) Reused for boiler fuel after being Gas making boiler residue 20000 smashed and mixed with coal Desulfurizer residue and boiler Reused in brickyard 45600 cinder Catalyst waste Recycled by manufacturer 35 3.1.7 Pollutants treatment of this existed project 188.8.131.52 Sewage treatment The current sewage treatment facilities mainly include one set of urea desorption waste liquid treatment device and one set of terminal sewage treatment device for the whole plant. The main discharged waste water of Qiaodan Chemical Industry Co., Ltd. is domestic sewage and cooling water, including domestic sewage discharge about 38000t/a, which is discharged to Dongjiang River only through primary sediment of the septic tank; the cooling water discharged is about 30 million t/a. a) Urea desorption waste liquid treatment device Qiaodan Chemical Industry Co., Ltd. has a set of Urea desorption waste liquid treatment device whose handling capacity is 10m3/h. Current amount of Urea 26 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project desorption waste liquid treatment is about 7.5m3/h and the main pollutants are COD、 SS、NH3-N. The general handling process is hydrolyzation, that is: firstly, raise the pressure of the urea desorption waste water from desorption tower to 1.6Mpa through hydrolyze feed pump and then hydrolyze with gas in hydrolyze tower, thirdly contact with the fresh steam and desorb most ammonia and CO2, fourthly, send to low pressure recycling system. Liquid form hydrolyze tower can be directly used in the boiler as boiler soft water. Treatment result: After treatment all sewage is recycled and used as soft water and finally accomplish zero pollutants. b) Terminal sewage treatment device Sewage from gas making, boiler, defurization and some other processes firstly flows into second grade sediment pool. After 15 hours the cinder and fine dust are left and the sewage then flows into cooling tower. After treatment the cooling water is sent back to the original production device. The handling capacity of this sewage treatment station is 3000 m3/h. The handling process please refers to chart 3-4. Treatment result: accomplish closed circuit of gas making, boiler, defurization system cooling and washing water and zero discharge of waste water including cyanogen and dust. Fig. 3-4 Terminal sewage treatment process Gas making sewage Second grade sediment Cooling water Recycling Defurization sewage pool Cooling tower sewage from boiler room water Residue dehydration Residue 27 Taking away EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 184.108.40.206 Waste gas treatment Existed waste gases are gas-making blowing gas, refine regeneration gas, synthetic bleeding, ammonia reservoir front gassing and urea waste gas, most of which is recycled and release in the upper air. It includes, a) gas-making blowing gas from 8 nether gas making boiler is released after being burned b) gas-making blowing gas from 8 upper gas making boiler hasn’t been recycled. c) Recycling of the synthetic ammonia: 1) After being recycled ammonia, refining regeneration gas goes into defurization system and then fluid ammonia is got. 2) through membrane separation hydrogen recycling device hydrogen in synthetic bleeding is taken away, and the remaining gas is burnt in wind blow gas furnace. 3) After ammonia in reservoir front gassing being taken away, the remaining gas is burnt in wind blow gas furnace and fluid ammonia is the byproduct. Current waste gas treatment and standard emission please refer to Tab. 3-13 Tab. 3-13 Current waste gas treatment and standard reaching situation Height of Standard reaching Waste gas treatment exhaust situation funnel(m) Prilling tail gas Traditional spray-head 60 Y Absorption tower tail gas Spray pump absorption 30 Y Solid sulfur in Gas from one 75t/h circulating boiler/hop-pocket 100 Y fluid bed boiler aspirating Gas from remaining heat Untreated 66 SO2 (Y)，dust (N) boiler Unrecycled wind blow gas Release at low Untreated SO2 (Y)，dust (N) from 8gas making boiler altitude 220.127.116.11 Waste solid treatment Waste solid treatment please refer to Tab. 3-14 Tab. 3-14 Waste solid treatment Waste solid Treatment Remark: receiving unit name Gas making Reused for boiler fuel after being Our factory 28 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project residue smashed and mixed with coal Reach agreement with the private building Boiler cinder Reused in brickyard material corporation near around，the integrate utilizing rate of dust and residue is 100%。 Waste Recycled by manufacturer catalyzer 18.104.22.168 Noise treatment Current facilities, such as gas making fan, Ross fan and compressor are equipped with anechoic device and the base of these facilities has absorbers. The factory building and operating room has sound arrester. So the noise is under control. Pollutants list 3.1.8. Total pollutant discharge of the existing project Tab. 3-15 shows the total pollutant discharge of the existing project Tab. 3-15 Total pollutant discharge of the existing project No Pollutants Quantity 1 Waste gas 3430 million m3/a 2 SO2 362 t/a 3 Smoke and dust 268t/a 4 Ammonia 87 t/a 5 Waste water 30.1172 million t/a 6 COD 12.16 t/a 7 NH3-N 7.74 t/a 8 CN- 0.40 t/a 9 Oil 0.025 t/a 3.2 Current project situation 3.2.1 Main content of current project Current project includes “thermoelectric project” and “zero discharge project” which were assessed since 2006 and approved by Hunan Environment Protection Bureau. Besides Qiaodan Chemical Industry Co., Ltd. is applying for “double 20” energy saving technique improvement project whose environment effect report has been approved by expert and is now waiting the permission of Hunan Environment Protection Bureau. The general information of current project and applying project please refer to Tables 3-16, 3-17 and 3-18. 29 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 3-16 General information of “zero discharge project ” nitrogenous fertilizer production sewage integrated treatment environmental Project name treatment project( “zero discharge” project for short) Nature Technique improvement Improve the terminal sewage treatment device and urea desorption device， Scale establish a set of gas making sewage treatment device Location North of current production area Investment RMB15.3437million Improve the current urea desorption device’s general hydrolyze to be profound hydrolyze and the capacity of it is 10m3/h；transform part of current terminal sewage treatment device into a gas making cooling water treatment device whose capacity is 1300m3/h and accomplish closed circuit；transform part of terminal Content sewage treatment device into a desulfurization cooling water treatment device with a capacity of 200m3/h and accomplish closed circuit； transform the remaining part of the terminal sewage treatment device into sewage integrate treatment device with a capacity of 30m3/h；Separate clean and dirty water and reuse them according to their grade. Most of the waste water of the whole plant is recycled, but the sewage treatment Current facility hasn’t been improved and constructed and the clean and dirty water is situation mixed Pollutants Except cooling water, all waste water accomplish “zero discharge” emission Tab. 3–17 General information of “thermoelectric project” Project Chenzhou Group thermoelectric project name Nature Technique improvement Scale 2 sets of 75t/h boiler with a 12MW turboset respectively Location Northeast of current production area investment RMB76.2468million One 75t/h circulating fluid bed boiler with a 12MW single Draw-condensation(0.294Mpa) turboset accessory and one Content 75t/h circulating fluid bed boiler with a 12MWsteam single draw-condensation(1.27Mpa) turboset accessory Exist one 75t/h circulating fluid bed Current boiler with a 12MWdraw-condensation turboset accessory，and accomplished situation thermoelectric production Designed desulfurize rate of circulating fluid bed Pollutants Boiler with limestone is more than 80%。 The designed desulfurize rate of prevention hop-pocket aspirating is 99.86%。 Pollutants Quantity of boiler smoke is about 0.285 million m3/h，annual emission of SO2 is emission 3 about 468 t/a， density of SO2 is 228mg/m 。Quantity of smoke dust is 99 t/a， 30 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project density of smoke dust is 48.16mg/m3 Tab. 3–18 General information of “double 20” energy saving technique improvement project Project “double 20” energy saving technique improvement project name nature Technique improvement Scale Enlarge both the production of synthetic ammonia and urea to 200000t per year location Current production area investment RMB 350.0576 million Establish a set of synthetic ammonia production device with a capacity of 120000t per year，thus the production of synthetic ammonia of the whole plant will raise content from 80000t per year to 200000t per year；improve the existed urea production device to raise the production from 130000t per year to 200000t per year Current Environment effect report is approved by experts situation 3.2.2 Current project technique 22.214.171.124 “Zero discharge” project “Zero discharge” project mainly includes: a) Turn urea desorption fluid treatment to profound hydrolyzation b) Transform part of the terminal sewage treatment device into a set of gas making cooling water treatment device with a handling capacity of 1300m3/h c) Transform part of terminal sewage treatment device into a set of desulfurization cooling water treatment device with a capacity of 200m3/h d) Transform the remaining part of the terminal sewage treatment device into sewage integrate treatment device with a capacity of 30m3/h Current terminal sewage treatment device is adjacent to Dongjiang River. Because of the low prevention standard and the change of water level of Dongjiang River, some waste water often pollutes the River. We should enhance the standard and prevent the spill. The techniques for each method are as follows: 1) Urea desorption fluid profound hydrolyzation technique 31 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Theoretically, producing 1t urea will generate 30kg water(actually, because we need to add steam and washing water to the system, the water generated is about 550~650kg.) The purpose of hydrolyzation is to turn urea which is illabile under common condition to ammonia and carbon dioxide which is recycled to urea production system under the condition of high temperature and pressure by utilizing special hydrolyze reactor. The amount of ammonia and urea in desorption remaining fluid is quite small, so it can be used as boiler water or flows into terminal sewage treatment device. Desorption remaining fluid will counteract with mixed waste water and then be used in water consuming process. 2) Gas making cooling water treatment Gas making waste water adopt closed circuit. After sediment in sediment pond, the water will be treated in tower biological filter and then sediment in sediment pond again and finally cooling in cooling tower and the water can be reused. The processes of this device please refer to chart 3-5 and the result please refer to Tab. 3-19 Tab. 3-19 Gas making sewage treatment result list Unit: mg/l Volatile Project pH COD SS NH3-N CN- S2- hydroxybenzene Water in 6～9 250 500 100 10 2.0 2.0 Water out 6～9 ≤150 ≤100 ≤70 ≤1.0 ≤0.5 ≤0.1 clearance ≥40 ≥80 ≥30 ≥90 ≥75 ≥95 ％ Gaswashing Sed. tank Tower bio-filter tank Water cooling tower Sed. tank Fig. 3-5 Gas-making cooling wastewater treatment 3) Desulfurize cooling water treatment After being washed, semiwater gas formed in gas making process produce a large amount of gas making cooling water which flows in closed circle after being 32 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project treated. The temperature of the semiwater gas is still high and our current desulfurization technique can’t handle the semiwater gas with high temperature. So before being sent to be desulfurized, the hot semiwater gas should be cooled again. Now most corporations will directly use water to cool it so much waste water which is called desulfurize cooling water will be produced. Most pollutants are removed at the first washing so this flow of waste water can be put in closed circuit after simple filter. The process please refer to Fig. 3-6 Secondary gas washing Hot water pump Auto washing filter Water cooling pump Cooling tower Fig. 3-6 Desulf. cooling wastewater treatment 4) Terminal sewage treatment Terminal sewage treatment station which is adjacent to Dongjiang River in the north locates at the northwest of the production area. Sewage treated by terminal sewage treatment device includes sewage containing oil from compressor, exceeding steam condensate at process joint, Methanolization-Hydrocarbylation Process regeneration waste water, floor and devices washing water of all processes, sewage and domestic waste water from circuit water system. By adopting A/O technique, the designed handling capacity is 30t/h. After being treated, the water meet the first grade standard in table 4 of Sewage Integrate Discharge Standard(GB8978-1996) and can be used for complement of circuit water and for virescence, spraying in coal field and so on. Sewage Coagulant aid Adjusting Anaerobic Anoxic tank CASS tank Recycling tank Recycle system Coagulant Mud Sludge concentration tank Taking away aid 33 Fig. 3-7 Terminal sewage disposal process EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Principle of A/O technique: A/O technique adopts nitration&anti-nitration, and redox to denitride. With oxygen, nitrogenous substances in the sewage firstly are turned into nitrite with the effect of nitrobacteria and other hazardous substances will be deleted. Then under the condition of lacking oxygen nitrate and nitrite are turned into hydronitrogen through denitrification. Main reactions are as follows: Nitration: Nitrosomas Nitromonas Anti-nitration: Denitrifying bacteria 126.96.36.199 Thermoelectric project process Thermoelectric project is to establish two sets of 75t/h boiler with a 12MW turboset accessory respectively. One set of that has been established and put into effect and the second belonging to the second stage of the project hasn’t been started to establish. The designed fuel for thermoelectric project is mixture of coal and gas making boiler residue. Designed fuel consumption is 209454 t/a per set and sulfur contain of the fuel is 0.67%. By using circulating fluid bed boiler with limestone, the desulfurization rate is more than 80%. Density of the emissioned SO2 is 228mg/m3 , annual emission is 468 t/a; emission of boiler smoke dust is about 285000m3/h, density is 34403.56mg/m3, annual emission is 70653t/a, by utilizing hop-pocket aspirating, the aspirating rate is 99.86% , the density of treated smoke dust is 48.16mg/m3 and the emission of smoke dust is 99t/a. 34 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Thermoelectric project production process and pollutants treatment system please refer to Fig. 3-8. 35 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Lime powderr Water clarifying Lime powder st Coal tank Coal bit Coal field Metering Residue SO2, TSP, NOx Reuse Generator Steam turbine Boiler Draft fan Bagroom Coal Gas making Coal powder Smoke Condensator Ash Cooling water Boiler Coal Truck transp. Dry ash st. Utilization acid field Urea section Coal smasher cleani cleani Wet Dust field De-O ng ng ash Dong Slag Water treatment Cond. water water water River process device Residue st. Residue field Primary wa. device Residue disposal sys. Wet Wet resid resid. Water for wet residue Waste water Chem. Water tank pH adjusting tank Wastewater storager Adjusting tank Oil separation Domestic sewage Septic tank Hangfire Landscaping water Wastewater disposal system Fig. 3-8 Production process and pollutants treatment system of Thermoelectric project 36 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 188.8.131.52 The applying “Double 20” energy saving technique improvement project The processes of “Double 20” energy saving technique improvement project are similar to the existed synthetic ammonia and urea production processes. Main improvement please refer to Tab. 3-20 Tab. 3-20 Technical upgrading of “Double 20” energy saving technique improvement project Current condition Newly added Whole plant Urea 130000t/a 70000t/a 200000t/a Product Ammonia 80000t/a 120000t/a 200000t/a Fixed level gas stove intermit gasification，12 DN2800 gas stoves in gas Gas making making process，gas from gas making boiler in the whole plant is 150000 Nm3/h。 Desulfurization of fluid Desulfurization Desulfurizeation of vegetable tannin extract ammonia Main Exchange Low temperature exchange process to synthesize Decarburization Decarburization of propylene carbonate ammonia Methanolization and Methanation Purification Refine Methanolization-Hydrocarbylation Process Process Synthesize Catalyst synthesize with high temperature and high pressure Urea Technique Improved water solution circuit The information about wind blow gas of 12 newly added DN2800 gas stove in gas making process please refer to Tab. 3-21. Tab. 3-21 Information about wind blow gas in “Double 20” energy saving technique improvement project Component CO2 CO O2 H2 CH4 N2 total ％ 14.40 6.40 0.45 2.50 0.89 75.36 100 Nm3/h 21600.02 9600 675 3750 1335.015 113040 150000 Kmol/h 964.29 428.58 30.135 167.4 59.595 5046.42 6696.42 KJ/℃ 27321.43 8571.43 602.68 3348.22 1191.97 100928.56 141964.29 3.2.3 Main problems of current project The design and construction of current project which is based on the production capacity of synthetic ammonia and urea and pollutants emission in 2006 didn’t consider the development of Qiaodan Chemical Industry Co., Ltd.. The problems are as follows: 37 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project a) The designed handling capacity of terminal sewage treatment device is 30m3/h, without a consideration of the treatment and recycling of cooling water. b) After the implementation of “Double 20” energy saving technique improvement project, the production of urea desorption fluid is about 15m3/h. However the urea desorption fluid treatment device in “zero discharge” project can’t meet the demand with handling capacity of 10m3/h. c) Designed handling capacity of gas making cooling washing waste water is 1300m3/h and the treated waste water flow in a closed circle. After the implementation of “Double 20” energy saving technique improvement project, the production of gas making cooling washing waste water is about 1400m3/h，but the “zero discharge” project can’t handle it. d) The present upper gas-making blowing gas of 8 gas-making furnaces has not been recycled for use. Above mentioned project’s existed environment problem will be properly solved through “Promoting the Old by Building the New” with Double 20 Energy Saving Technology Upgrading Project. Referring to followed Tab. 3-22. Tab. 3-22 Information about “Promoting the Old by Building the New” with Double 20 Energy Saving Technology Upgrading Project After Zero Emission After Double 20 Project Current project Project implementation implementation Independently treat Gas-making cooling closed circuit loop Scale expanded to waste water Treatment 1400m3/h scale1300m3/h Independently treat Based on Zero Emission Desulfuration cooling closed circuit loop Project implementing, water After mixed sediment Treatment scale 500m3/h without change treat, recycled for use Independently treat and for each water Newly increase one set of enter into the plant waste Urea desorption liquid consumption process, device with treatment scale water circulation, with a few draining to 20m3/h treatment scale 10m3/h Dongjiang River After mixing, A/O method treatment, recycled for use Scale expanded to 150 Other waste water of for each water consumption m3/h ， considering the plant process, Treatment scale indirect cooling water 30m3/h, without considering indirect cooling water. Blow gas from 8 Newly build one set of Gas- making blowing gas-making furnaces has / 25t/h remaining heat gas been recycled, but boiler, to recycle blow 38 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project remained 8 gas-making gas of remained 8 furnaces has not been gas-making furnaces and recycle 12 sets newly build gas- making furnaces. 3.2.4 Summary of pollutant emission of the project in progress For the project in progress of Qiaodan Company (Zero Emission Project + Double 20 project + Thermo-power co-production stage II), the main pollutants emission and the whole plant emission is summarized as following Tab.3-23: Tab. 3-23 The main pollutants emission of the project in progress and summary of the emission of the whole plant Emission quantity of the Emission reduction quantity No. Pollutant name whole plant after the project of the project in progress completion 1 Waste gas(10000m3/a) 210000 553000 2 SO2(t/a) 266 628 3 Fume ash and dust(t/a) 84 416 4 Ammonia(t/a) 56 108 5 CO2 (t/a) 276622 461037 6 Waste water(万 t/a) -3012 0 7 COD(t/a) -12.16 0 8 NH3-N(t/a) -7.74 0 - 9 CN (t/a) -0.40 0 10 Petroleum lipid(t/a) -0.025 0 39 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4. Analysis of the planned project for construction 4.1 General information 4.1.1 Project name and features Project name: 75t/h 3-waste fluidized mixed-combustion furnace remaining heat utilization, 40×104t/a soda ash carbon dioxide multipurpose utilization emission reduction project of Chenzhou Qiaodan Chemical Industry Co., Ltd. Nature: Technical upgrading 4.1.2 Production scale, product plan and construction content Production scale: a. 75t/h 3-waste fluidizing mix-burning furnace remaining heat utilization project; b. 40×104t/a 40×104t/a soda ash carbon dioxide multipurpose utilization emission reduction project, Product plan: a. 2.5Mpa steam 75t/h b.98.5% soda ash 40×104t/a c.≥90% ammonium chloride 44×104t/a Construction content: a) Newly build on set of 75t/h 3-waste fluidized mixed-combustion furnace, to recycle blow gas produced by the whole plant and use the remaining heat to produce steam, meanwhile, to stop the second stage project of thermo-power co-production of Qiaodan Company (i.e. not newly build 2nd set of 75t/h circulation fluidized bed boiler and attached one set of 12MW steam turbine generating unit). One set of 15t/h remaining heat boiler current-used is for standby use. b) Newly build one production line for 40×104t/a soda ash 4.1.3 CO2 gas comprehensive use CO2 emission quantity of 200000t synthetic ammonia device in Double 20 Project of Qiaodan Company is 29150Nm3/h, with remained CO216700Nm3/h totally discharged after assorted urea production, which not only waste resources, but pollute the environment (produced a lot of greenhouse gas). After the project completion, utilization rate of CO2 may achieve 97.5%, with discharged only 417.5Nm3/h. 4.1.4 Main products quality standard Soda ash (industrial sodium carbonate ) and ammonia chloride quality standard may refer toTab.4-1 and Tab.4-2. 40 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 4–1 Industrial sodium carbonate (GB210-2004) GradeⅠ GradeⅡ Index of item High quality High quality Grade A Qualified Total alkali (Taking dry-base calculation 99.40 99.2 98.8 98.0 Na2CO3 ≥) Total alkali (Taking theory-base 98.1 97.9 97.5 96.7 calculation (Na2CO3 ≥) Chloride (calculated based on NaCL) ≤ 0.30 0.70 0.90 1.20 Iron(Fe) content ％ 0.003 0.0035 0.006 0.020 Sulphate (Taking dry-base calculation 0.03 0.03 SO2) content %≤ Substance not dissolve in water %≤ 0.02 0.04 0.10 0.15 Burning rate %≤ 0.8 0.8 0.8 0.8 Stack height mg/L≥ 0.85 0.90 0.90 0.90 Granularity, 180um≥ 75.0 70.0 65.0 60.0 margin ％ 1.18um≥ 2.0 A is content while packing. In delivered goods, total alkali multiplies the masse then divides the masse on the delivery list. The value shall not be lower than the index. B is ammonia and alkali control index. C is heavy mass sodium carbonate control index. Tab. 4–2 Farming used ammonia chloride High Index name Grade A Qualified Remark quality Nitrogen(N) content(Taking dry-base 25.4 25.0 25.0 calculation) %≤ Moisture content 0.5 0.7 1.0 Sodium salt content( taking Na 0.8 1.0 1.4 calculate) %≤ Granularity(1.0~4.0mm grain) %≤ 75 Friability(8L through 5.0mm) % ≤ 75 Standard for ammonia chloride product shall adopt high quality standard in the project. 4.1.5 Production system, labor number Production system: 8000 hours of production per year. Labor number: newly increased labor number is 412 persons. 4.1.6 Investment for construction, fund raising Total investment: RMB 511.3271 million Fund raising: 64% of total investment may apply for bank loan, and the remaining 36% shall be self-raised by Xiangnong Group. 41 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4.1.7 Economic benefit Annual averaged total profit: RMB85.0328 million Annual averaged profit after tax payment: RMB63.7746 million Total rate of investment return: 17.39 % Profit and tax rate of investment: 15.82 % EIRR(after income tax): 17.81% Payback period after income tax(including construction period) 5.83years 4.1.8 Project implementation plan a) The project is old plant technical upgrading, and the old system will continue production, at the same time, the new system will be constructed. By using overhaul and mid-term maintenance interval, the old system production will not be affected. b) To make the most of current used workshops and equipment, each work section upgrading may be alternately conducted. c) The construction period in the plan is one year, started from the date of fund operation. d) This project will be put into operation in August, 2009 based on the plan. 4.1.9 Main technical and economic indexes Main technical and economic indexes of the project may refer to Tab. 4-3 Tab. 4–3 Main technical and economic indexes No. Item name Unit Index Remark 1 Production scale: soda ash 104t/a 40 2 Product plan 2.1 Medium pressure steam t/h 75 2.2 Soda ash 104t/a 40 4 2.3 Ammonia chloride 10 t/a 44 3 Construction effect Gas-making remaining heat Converted to standard coal 3.1 106KJ/h 128.69 recycled 35300t/a Transform CO2 utilization rate 3.2 Comprehensive use CO2 104t/a 25.12 achieved to 97.5% 4 Annual operation hours h 8000 Main raw and accessory 5 materials 5.1 Liquid ammonia 104t/a 14.2 5.2 Crude salt 104t/a 49 98.5% 5.3 Primary water consumption t/h 280 42 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project No. Item name Unit Index Remark 5.4 Circulated water quantity m3/h 6000 5.5 Drive power kW 13054 Newly increased capacity 6 Transport quantity 6.1 Transport-in quantity 104t/a 57.21 6.2 Transport-out quantity 104t/a 92.34 7 Employee number person 412 2 8 Total building area m 39312 Covering area of buildings 9 m2 30707 and structures 10 Total project fund RMB 10000 51132.71 10.1 Construction investment RMB 10000 48541.77 10.2 Circulating fund RMB 10000 6142.64 11 Annual sales income RMB 10000 92000 12 Cost and fees 12.1 Annual averaged total cost RMB 10000 81392.1 Annual averaged operation 12.2 RMB 10000 75897.84 cost 13 Annual averaged total profit RMB 10000 8503.28 Profitability index of 14 financial analysis Profit and tax rate of 15.1 % 15.82 investment Rate of total investment 15.2 % 17.39 return Payback period(including 15.3 construction period) Before income tax year 5.08 After income tax year 5.83 15.4 Internal rate of return Before income tax % 22.73 After income tax % 17.81 Net present value of project 15.5 finance (IC=12%) Before income tax RMB 10000 24662.39 After income tax RMB 10000 12895.08 43 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4.2 Project location, layout and main buildings and structures 4.2.1 Location of project construction Qiaodan Company is located in Qiaokou Town, north of Chenzhou City, on the south bank of Dongjiang River, about 2km from the plant to Qiaokou Town, 3km from Qiaokou Railway Station, 23km from downtown area of Chenzhou City. The technical upgrading project is built in current plant area, without new requisition land. 4.2.2 Project layout The plant covers an area of 66830m2 , with building area of 39312m2 , including production building area of 30707m2 . Present buildings in the living area will be relocated, and the project will fully use current plant land. The general layout of the project shall ensure smooth production and transport route, reasonable arrangement and land saving under the premise of satisfying process production demand by combining actual condition of the current production facilities, meanwhile, shall satisfy fireproof, explosive-proof, safety and hygiene demands etc. The general layout is as follows: 400000t/a soda ash project includes the facilities for heavy alkali, calcine, ammonia chloride, dry ammonia, CO2 compression, refrigeration and finished product warehouse arrangement. Using Qiaodan Company’s current living area after relocation, the project is built on the south of the current plant area. 75t/h gas making 3-waste fluidizing mix-burning furnace will be installed near original synthetic ammonia gas-making device. The circulating water device will be expanded on the south corner of the plant, with details referring to General Layout Figure. 4.2.3 The plant transportation The newly increased transport volume of the project is 1.4955 million tons, including transport-in raw material 572100 tons, transport-out products 923400 tons. The raw materials and finished products are transported by railway wagon. In the plant, it has cargo load and unload special railway line. The short distance and carload cargo transport relies on the highway. 4.2.4 Storage and transport Salt warehouse, alkali storehouse, heavy mass alkali storehouse and ammonia chloride warehouse will be built in the current warehouse area of the plant. The total floor space of the 44 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project raw material and finished product warehouses is 21720m2. 4.2.5 Main buildings and structures Main buildings and structures refer to Tab. 4-4 Tab. 4–4 List of Main buildings and structures No. Name of buildings and structures Covering area (m2) Floor space (m2) 1 Mix-burning furnace workshop 1841 864 4floors 2 Salt warehouse 1800 1800 one floor 6000 one floor, partial 3 Soda ash warehouse 5640 building with 5 floors 4 Ammonia chloride warehouse 9720 9720 one floor Ammonia chloride, carbonization 5 1440 5760 four floors combined workshop 6 Heavy mass alkali workshop 1800 1800 one floor 7 Heavy mass alkali warehouse 3600 3600 one floor 8 Calcined workshop 1008 7550 four floors 2160 four floors, partial 9 Dry ammonia workshop 522 building with 5 floors Salt mud compression, CO2 compression, 10 720 1440 two floors refrigerator and power distribution 11 Workshop comprehensive building 1008 3024 three floors Water tank 504, pump 12 Circulating water branch Pump house 224 house 224 4.3 Public utilities 4.3.1 Water supply and drainage a) Water supply This project is built in the plant of Qiaodan Company. The facilities for urea, synthetic ammonia and thermo-power station are available in the plant area. Water supply for production and living adopts self-installed water source device. Production used water is pumped from Dongjiang River and living water is from the municipal tap water company. AS for the production water, 2 pumping houses are built near the river. Each pumping house is equipped with 3 water pumps, with 2 operated and 2 as standby. The water supply capacity is 2340m3/h each，total water supply capacity is 4680m3/h , with pump lift 44m. The water supply capacity may have surplus of 36 Production used water amount is about 280m3/hand living used water is about 12m3/h. b) Drainage The drainage system of the project implements shunting of clean and dirty water, 45 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project equipped with sewage and clean wastewater drainage two piping networks 1) Domestic sewage drainage system: Domestic sewage produced is 12m3/h, after the septic tank treatment, drained into sewer in the plant area. 2) Production waste water drainage system: Waste water produced from the project will be merged with current synthetic ammonia device, circulating dirty water drainage and raining water beside the boiler then drained to the plant sewage treatment station for treatment. The treated sewage shall meet Grade I Drainage Index of GB 8997-96 in Sewage Integrated Drainage Standard, then directly entered into the plant raining water piping network, at last drained into Dongjiang River. After the technical upgrading project completed, the production waste water draining volume is 4500m3/h. 3) Raining water drainage system: the roof raining water is collected with water skip, and the street raining water is collected with rainwater port. All are drained into the plant raining water piping network, at last drained into Dongjiang River. 4.3.2 Power supply At present, there is 2 transformer stations in the plant area, including 35kV/6kV urea transformer station(with supply capacity16000kW) and synthetic ammonia transformer station (with supply capacity 8500kW) . Power source 35kv incoming power line is connecting Qiaokou Substation (1.5 km away from the project site) and Xiuqiao Substation (5km from the project site). At present the power supply capacity is 24500kW. There is a thermo-power station in the plant, equipped with one set of 75t/h circulating fluidized bed boiler and one set of 12 MW steam turbine generating unit. The power equipment capacity for the production and accessory facilities is 18395kW, permanent operation capacity 16005kW, and the demanded capacity is 13054kW. The power use loan for circulating water, production and main devices is Grade 2, others Grade 3. The project adopts current 2 loops 35kV power cable for power supply, which can satisfy the demand of Grade 2 load. The generating set of the thermo-power plant can supply power to this project. 4.3.3 Heat supply After the technical upgrading project completed, steam consumption of the plant may refer to Tab.4-5. Tab. 4–5 Plant process steam load No. Item of steam use Pressure MPQ Quantity t/h 46 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 1 Synthetic ammonia production 0.2 100.5 2 Urea production 1.3 63.35 3 Soda ash 2.5 72.65 Total 236.5 Remark: Steam use quantity may take consideration for Double 20 Energy-saving project construction. The current heat supply facilities of the plant may produce 105.4t/h of steam, plus planned one set of 25t/h remaining heat recycled boiler and attached synthetic waste gas boiler and gas-making clip-sleeve boiler in Double 20 technical upgrading project, the plant total steam volume is 153.5t/h, which can’t satisfy the implementation of 400000 t/a soda ash project, therefore, one set of 75t/h gas-making 3 waste fluidized mixed-combustion furnace for the project shall be built, at the same time, to stop the second stage project of thermo-power co-production (i.e. not newly build 2nd set of 75t/h circulation fluidized bed boiler). One set of 15t/h remaining heat boiler current-used is for standby use. After the new project steam production 83t/h achieved, the plant steam supply load may hit 236.5t/h, thus achieving steam balanced operation and satisfying the project construction. Steam supply load refers to Tab.4-6. Tab. 4–6 Heat supply device information Steam Steam No. Heat supply device Quantity pressure produce Remark MPa capacity t/h I Current used device 75t/h circulation fluidized bed 1.1 1 3.82 75 One set available boiler 1.2 Blow gas recycled boiler 1 1.72 15 One set built “Double 20” one set 1.3 Blow gas recycled boiler 1 1.72 25 planned for construction Synthetic waste gas boiler and 1.4 38.5 gas-making clip-sleeve boiler Sub-total 153.5 II The new project To replace 75t/h circulation fluidized bed gas-making 3 waste fluidized 2.1 1 2.5 75 boiler of second stage mixed-combustion furnace thermo-power co-production project Gas making clip-sleeve and 2.2 0.2 23 remaining heat recycling 47 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Steam Steam No. Heat supply device Quantity pressure produce Remark MPa capacity t/h Current used blow gas recycled 2.3 1 1.72 －15 As the standby boiler Sub-total 83 (I) +(II) Total 236.5 4.4 Remaining heat utilization project of gas-making 3 waste fluidized mixed-combustion furnace 4.4.1 Process selection At present, the remaining heat recycling of gas-making section of the synthetic ammonia enterprises, generally, is to recycle latent heat or remaining heat of gas-making blow gas, then to produce steam and return to gas-making system for use. But the waste solid of gas-making process, including slag, de-duster fine ash and coal refuse, are used by other methods or sold in low price. The resources can’t be fully used. 3 waste fluidized mixed-combustion furnace means to make 3 wastes in the process of synthetic ammonia gas-making, i.e, waste gas (gas-making blow gas), waste residue ( slag or coal refuse), waste ash (gas-making dust-collector fine ash), for concentrated fluidizing and mixed combustion then making industrial used steam. Gas-making 3 waste fluidized mixed-combustion furnace, meanwhile, can treat-off low calorific waste gas produced in e production process of synthetic ammonia, urea, methanol and hydrogen-making and other work sections, such as flash steam in wetted decarburization, regenerated gas in copper finish process, adverse released gas in pressure change etc. But high calorific synthetic gas can be few used or not used, and the produced medium pressure steam can be reasonably used through the device. The appeared 3 waste fluidized mixed-combustion furnace fills the gap of 3 wastes treatment in solid layer gas-making process of China. It is not only the best model for energy integrated use, but the best plan for 3 wastes treatment in environment protection, enabling the enterprise to achieve the highest economic benefit, thus achieving Two Coal in One Coal and Two furnaces in One Furnace in synthetic ammonia production. 3 waste fluidized mixed-combustion furnace belongs to the third generation of gas-making blow remaining heat boiler. Compared with the first and second generation, it has great advantages. a) Safety: 3 waste fluidized mixed-combustion furnace takes gas-making slag or coal as the ignition source, with open flame always in the furnace, so the explosive factor can be 48 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project expelled, which thoroughly changed the danger state during recycled operation of blow gas and overcome the explosive trouble during the gas-making blow gas recycling. b) Increase yield: During the operation of 3 waste fluidized mixed-combustion furnace, it can few use or not use synthetic gas ignition, with synthetic ammonia yield increased 3-5%. c) Achieving the target of Two Coal in One Coal and Two furnaces in One Furnace. d) Solving the problem of waste gas, waste residue and waste ash treatment in gas-making process, the environment is protected and the production site is harnessed. e) Fewer use or not use synthetic gas can avoid the situation of synthetic gas short supply and unstable gas-making blow gas, thus alleviating the difficulty of synthetic ammonia production management. f) One furnace has multiple purposes and capacities, which can halt high energy consumption boiler for energy saving and high efficiency, meanwhile, it can decrease partial operating employees. g) The integrated use of 3 wastes may promote steam yield doubled and doubled. The produced high pressure steam can be used for soda ash and caustic soda calcine production, making the remaining heat fully utilized to save energy. 3 waste fluidized mixed-combustion furnace is selected as the production process of gas-making remaining heat recycling. 4.4.2 Briefing for process flow 3 waste fluidized mixed-combustion furnace takes gas-making slag or coal as the ignition source. Gas-making blow gas mixed with heat air is sprayed into furnace for combustion. 2.5MPa overheat steam produced by recycling high temperature fume remaining heat can be conveyed to soda ash calcine furnace for use, and tail gas of fume can be dust-off through pre-heated air and soft water. After heat recycled, it is discharged to chimney for emission. Production process and pollutant produced links of gas-making 3 waste fluidized mixed-combustion furnace may refer to Fig. 4-1. 49 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Superheated steam (2.5MPa280℃) Gas making (250℃） Dust 3-waste fluidized Steam catcher mixed-combustion furnace superheater Air release A1 W1 S1 852℃ 223℃ 320℃ Mid-temp air Residual heat 247℃ recovery preheater Soft water heater A: waste gas S: waste residue Soft water from boiler house (150℃) W: waste water Air from blower (25℃) Fig. 4-1 Production Technology and Wastes Production Links of 3-waste Fluidized Mixed Combustion Furnace 4.4.3 Selection of main facilities Table 4-7 shows the main facilities of the 3-waste fluidized mixed combustion furnace. Tab. 4 -7 Table of Main Facilities No. Item Specification Unit Qty Remark 1 Cyclone dust catcher DN2500 Set 1 Developed by Linyi 3-waste mixed combustion 2 DN8500×195000 Set 1 Zhengda Heat Energy furnace Research Institute 3 Combined dust catcher DN7800×18800 Set 1 4 Residual heat recovery furnace 75t/h, 2.5Mpa, 280℃ Set 1 5 Bagroom Set 1 6 Chimney DN1500 Set 1 7 Air blower 9-26-16D Set 1 P=185KW 8 Draught fan Y4-73-18D Set 1 P=220KW 3 9 Soft water pressure pump DG85-67Q=85m /hH Set 1 P=160KW =335m 50 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4.4.4 Ananlysis of material consumption Table 4-8 shows the productive material consumption of the mixed combustion furnace. Tab. 4-8 Material Consumption Ration of Residual Heat Utilization Project of Mixed Combustion Furnace (75t/h steam) No. Item Specification Unit Cons. ration Remark I Consumption of raw material 1 Blowing gas Nm3/h 112500 SO2 :250mg/m3 II Public engineering consumtion 1 Chemical soft water 105℃ m3/h 78.75 2 Drive power kWh 424 3 Primary water 0.35Mpa m3/h 2 4.4.5 Balance of main materials 184.108.40.206 Balance of steam After the project is completed, the steam balance of the whole factory is described in Figure 4－2. Fig. 4-2 Steam Distribution of Residual Heat Utilization Project Unit: t/h Steam produced by stage-1 project 75t Existing For synthetic ammonia production 100.5t + Under- Steam produced by boiler 40t 236.5t For urea production 63.35t construction project Other by-product steam 38.5t For soda ash production 72.65t Steam from mixed combustion Project furnace 75t to be Existing 15t/h residual heat boiler for constructed standby use 15t Other by-product steam 23t 220.127.116.11 Balance of blowing gas After the project is completed, the balance of blowing gas of the whole factory is described in Figure 4－3. Fig. 4-3 Blowing Gas Distribution of Residual Heat Utilization Project Unit: m3/h 51 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Blowing gas from existing 8 upper gas making furnaces 15t/h residual heat recovery boiler 30000 37500 30000 Blowing gas from existing 8 25t/h residual heat recovery boiler lower gas making furnaces 120000 Blowing gas from 8 gas 90000 112500 75t/h boiler of mixed combustion fluid bed making furnaces after “Double 20” Project 4.4.6 Emission circs of main pollutants 18.104.22.168 Pollution source of waste gas The waste gas of the residual heat utilization project is mainly from the gas making 3-waste fluidized mixed combustion furnace. The emission of pollutants is described in Table 4-9. Tab. 4-9 Emission Circs of Waste Gases of the Project to Be Built Quantity Pollution source Main pollutants Nm3/h Treatment Original concentration Emission concentration measure Pollutant and production Tial gas from and emission quantity quantity gas-making New-type 3-waste fluidized 140455 35000mg /Nm3 49mg /Nm3 Soot bagroom dust mixed-combustion 4915.93 kg/h 6.88 kg/h collecting furnace 200mg/Nm3 200mg/Nm3 SO2 28.13 kg/h 28.13 kg/h 22.214.171.124 Pollution source of waste water The waste water of the residual heat utilization project is mainly from the waste water of the circulation system. Please refer to Table 4-10. Tab. 4-10 Discharge of Waste Water of Technological Transformation Project 3 Discharge source Max. discharge flow m /h Composition of water quality Waste water from from gas-making SS200~400mg/L, CODcr 3-waste fluidized mixed-combustion 2 300mg/l, BOD5250mg/L furnace (equipment washing water) water temp.≤42℃ 126.96.36.199 Pollution source of waste residue The waste residue of the residual heat utilization project is mainly from the slag of the gas-making 3-waste fluidized mixed-combustion furnace. Please refer to Table 4-11. Tab. 4-11 Discharge of Waste Residue of Technological Transformation Project Waste residue Discharge quantity t/a Discharge law Slag of the gas-making 3-waste fluidized 80833 Continuous mixed-combustion furnace 52 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4.5 Soda ash CO2 multipurpose utilization emission reduction project When this project goes into operation, Qiandan Company shall have 200,000t/a synthetic ammonia production capacity and 200,000t/a urea production capacity, however, 200,000t/a urea production needs nearly 120,000t of liquid ammonia, this means only 80,000t of liquid ammonia is left for soda ash production. The 200,000t/a soda ash production needs about 130,000t of liquid ammonia. Therefore, the liquid ammonia production capacity cannot meet the requirements of 200,000t/a urea production capacity and 400,000t/a soda ash production capacity at the same time. Qiandan Company plans to adjust the urea and soda ash production capacities in accordance with the supply and demand of the market. After the project is completed, Qiaodan Company shall not implement full-load production of urea and soda ash at the same time. 4.5.1 Selection of technologies At present, synthetic soda ash production methods mainly contain two production technologies of ammonia soda process and soda and ammonium chloride dual manufacture process. Ammonia soda process has the following advantages: the raw materials are easy to get and have low price; ammonia can be recycled in the production, with little loss; the process is easy for mechanization and automatization, and can produce fairly high quality product. This process has the following disadvantages: low utilization rate of raw materials, especially low utilization rate of NaCl, its real transformation rate is only 72~77%, the chlorin ion is not utilized, the total utilization of NaCl is only 28%; because of low utilization rate of raw material, lots of calcium chloride waste residue is discharged in the production, this causes serious pollution; the carbonized mother liquid contains lots of sal ammoniac, which needs adding lime milk for decomposition and then distillation for ammonia recovery; it is necessary to set up ammnia distilling tower, this process consumes lots of steam and lime, causes long technical flow and needs lots of equioments and energy source; therefore, this process has gradually fallen into disuse. soda and ammonium chloride dual manufacture process is an original production technology of our country. During the technical process, ammonia and soda can realize combined production. Comparing with the ammonia soda process, soda and ammonium chloride dual manufacture process enjoys the following strongpoints:: a) High utilization rate of raw materials, the utilization rate of NaCl can reach 90% 53 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project above. b) Low consumption and low cost: it needs no limestone or coke, it saves raw materials, energy source, transport cost and reduce product cost. c) It decreases unwieldy equipment, shortens production flow, reduces investment in building factory, needs no ammonia distilling tower, limekiln, ash eliminating machine or other unwieldy equipment, and saves 1/4 of the investment in building factory. d) It produces less three wastes and benefits environmental protection. This process contains high-concentration gas soda manufacture and conversion gas soda manufacture. Conversion gas soda manufacture requires fairly high management level. The soda and ammonia production systems are close combined and restricted each other. According to the comparison data provided by the relevant authority, the two processes need basically equal investment and operation cost. Qiaodan Company’s synthetic ammonia decarbonizing device can release fairly high concentration CO2 gas, which can be used for the gas source of the soda making tower, therefore, the project adopts high-concentration gas soda manufacture process. 4.5.2 Brief introduction to the technical flow The project adopts soda and ammonium chloride dual manufacture process, which contains two courses: the first course produces soda ash, the second course produces ammonium chloride. The two courses form a closed circulation. Figure 4-4 shows the technical flow and pollutant discharge points: 54 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Crude salt Clear liquid Mother S1 Salt mud Liquid II St. tank Salt-out cystallizer Thickener Cold sep. crstallizer Centrifuge NH3 Drying G6 dry amm. tail gas NH3 Heat absorber exchanger NH4CL G1 recovery NH3 tower tail gas Clarifying S2 salt mud NH3 barrel absorber G2 carb. tail gas CO2 from synthetic ammonia section Carbonizing tower Recovery tower Fetch tank G3 filt. tail gas Mother Return to Hou; process system Recovered NH3 liquid I Vacuum filter St. tank G5 powder Cal. furnace Packing Soda ash G4 cal. tail gas Recovered CO2 gas Washing, condensating tower W2 tail gas washing water Steam W1 tail gas washing Water after evap. water Liq. NH3 tank NH3 evap. tower W3 hi-conc. tail gas return crude salt system Note: G—waste gas discharge point; W—waste water discharge point; S—waste solid discharge point Fig. 4-4 Technical Flow and Discharge Points 55 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Analysis of production course of soda and ammonium chloride dual manufacture process: a) Work section of heavy soda Salting-out crystallizer clear liquid (mother liquid II) sedimentates in the storage tank. Apply clear liquid to make heat exchange with mother liquid I, upper clear liquid enters primary ammonia absorbing device for ammonia absorption to make mother liquid II. After defecation in the defecating barrel, apply clear liquid into ammonia II barrel, then clear liquid enters carbonizing tower. CO2 gas, via compressor, enters carbonizing tower and reacts with ammonia mother liquid II to produce sodium bicarbonate (heavy soda) suspension. After filtration in vacuum filter, suspension becomes solid sodium bicarbonate, and filtrate (mother liquid I) enters work section of ammonium chloride. Mother liquid II storage tank and defecating barrel produce solid waste of salt mud, carbonizing tower produces waste gas, vacuum filter produces waste gas, NH3 and CO2 are main pollutants, ammonia barrel produces NH3, all working procedures produce inorganized ammonia gas. b) Work section of calcination Heavy soda conveyed by belt conveyer of heavy soda working procedure is conveyed by helix conveyer into calcining furnace. Heavy soda is heated and calcined by 3.2Mpa steam in the furnace and decomposed into light soda ash, producing burner gas containing carbon dioxide, ammonia and water vapor. Light soda ash is discharged from furnace end, transported to the soda silo and packed for storage. Burner gas produced from heavy soda calcinations, after soda dust is removed by burner gas separator, enters burner gas condensator and makes indirect heat exchange with cooling water. Most water vapor is condensated, and partial carbon dioxide, ammonia and soda dust are dissolved. Condensated burner gas and distillation washing tail gas of the heavy soda working procedure together enter the lower part of the burner washing tower, and are conveyed to the pressure working procedure after washing and deammonia treatment. The calcining furnace produces waste gas, which contains such main pollutants as NH3, powder and CO2. All working procedures discharge inorganized ammonia gas. c) Work section of ammonium chloride Material salt is conveyed by belt conveyer into salting-out crystallizer. Mother liquid I produced by filter of heavy soda work section goes through second ammonia absorption by ammonia absorbing device, then enters ammonia I barrel. After heat exchange and cool 56 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project separating crystallization, it enters salting-out crystallizer to produce ammonium chloride crystal, then is mixed by stiffener together with partial ammonium chloride separated out from cool separating crystallizer, finally enters centrifuge and separates out solid ammonium chloride. Ammonia I barrel produces NH3. Centrifuge, stiffener and ammonia absorber produce inorganized ammonia gas. Salting-out crystallizer clear liquid (mother liquid II) enters heavy soda work section. d) Work section of compressure Work section of compression mainly compress the 98%CO2 gas provided by synthetic ammonia factory and the burner gas produced from the calcining furnace to 0.45Mpa and reduces the gas temperature to 40 , then delivers the gas to the work section of heavy soda for the use of the carbonizing tower. e) Work section of refrigeration This work section supplies refrigeration to the cool separating crystallization of the ammonium chloride work section, ammonia is used as refrigerant. In the external refrigenerator, liquid ammonia is vaporized to become gas ammonia. After separation of gas and liquid, gas ammonia enters screw-type ammonia compressor for compression. After high-pressure gas ammonia is condensated by vaporation condensator, liquid ammonia is collected in liquid ammonia storage tank. After decompression, it is conveyed to ammonium chloride crystallization consendator for cycled use. f) Work section of dry ammonium Wet ammonia from the work section of ammonium chloride enters boiling ammonium drying furnace, in which wet ammonia is directly dried by hot wind and becomes dry ammonium. Dry ammonium is directly conveyed for packing. Gas from the ammonium drying furnace has powder separated out in vortex separator at first, tail gas enters bagroom and washing tower and finally is discharged. The recovered ammonium chloride powder is conveyed to the packing workshop. g) Work section of paking finished product After screening, soda ash enters feed bin for automatic bag packing, then bag-packed products enters warehouse for storage. Dry ammonium enters feed bin for artificial packing, then is conveyed by belt to warehouse for storage. Main reaction formula: NH3+NaCl+CO2+H2O → NaHCO3+NH4Cl (mother liquid I) NH4Cl+ NaCl (solid) → NH4Cl (solid) +NaCl (mother liquid II) 57 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 2NaHCO3 → Na2CO3+CO2↑+H2O↑ 4.5.3 Material cinsumption Table 4-12 shows material consumption of soda ash production. Tab. 4-12 Consumption Ration of Carbon Dioxide Multipurpose Utilization Project Annual Consumption ration No. Material Specification Unit consumption (/t soda ash) (10,000t/a) 1 Crude salt 100% t 1.12 44.8 2 Ammonia 100% t 0.33 13.2 3 Carbon dioxide t 0.55 22 4 Steam 1.0 Mpa t 0.685 27.4 5 Primary water 0.3 Mpa m3 2.8 112 6 Power kWh 260 10400 7 Packing bag 50kg/bag 20 800 4.5.4 Selection of main facilities Table 4-13 shows main large-sized facilities for soda ash production. Tab. 4-13 Main Large-sized Facilities No. Item Specification Unit Qantity 1 Carbonizing tower Φ3000/3400 cast iron tower Set 8 2 CO2 screw compressor Set 3 3 Steam calcining furnace Φ3000 Set 2 4 Drum (soda) filter 20m2 Set 8 5 Cool separating, salting-out crystallizer Φ12000 Set 4 6 Cool separating, salting-out axial flow pump Set 12 7 Boiling ammonium drying furnace Set 2 4.5.5 Balance of main materials for soda ash project 188.8.131.52 Analysis of ammonia balance In accordance with the production practice of the factory, the project can realize an annual output of 400,000t soda ash and an annual side product output of 400,000t ammonium chloride. The ammonia balance is calculated according to 400,000t/a soda ash and 400,000t/a ammonium chloride. Figure 4-5 shows the ammonia balance. 58 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project NH3 68000 Urea production Liq. NH3 storage tank NH3 82000 (200,000t/a) NH3 50000 Crude salt Clear liquid 21031 Mother 10000 Salt mud 500 liquid II Salt-out crystallizer 70990 Thickener St. tank 20071 Inorganized 11031 discharge 5 60990 Inorganized Cold sep. crstallizer 80905 Centrifuge discharge 36 Inorganized 19571 discharge 150945 Inorganized discharge 5 20 NH3 82000 19571 NH3 Heat NH4CL 128844 exchanger absorber Adh. NH4 2000 101535 150945 Salt NH3 50000 Clarifying mud NH4 Discharge barrel 500 absorber 20 101030 Inorganized Inorganized discharge 5 discharge Carb. tail gas 20 Carb. tower 132 Inorganized discharge 5 100970 Recovery tank Fetch tank 98465 100970 Filt. tail gas Motther liquid I system Return to Hou’s process Recovered 98470 Inorganized Vacuum filter St. tank discharge 5 500 Inorganized 1990 discharge 5 Powder Cal. furnace Packing Soda ash NH3 Inorganized Cal. furnace tail gas 1980 discharge 10 Recovered CO2 gas Cons. tower Washing water1980 Steam Washing water 2592 Water after evap. 82 Liq. NH3 tank Evap. tower 612 Inorganized discharge 10 Fig. 4-5 Ammonia Balance Figure (unit: 10,000t/a) 184.108.40.206 Analysis of water balance The soda ash project needs an annual total water consumption of 1,320,000t/a, including 1,120,000t fresh water (tap water) and 200,000t soft water. Figure 4-6 shows the water balance of 59 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project the project. Tapwater Soft W 112 20 132 10.4 6 1.5 2 104.5 Carry off 3.8 Loss 7.6 Washing water Domesticwater Adding water Wash tower Recovery tower Evap. loss 0.2 1 Loss 0.4 Loss 86 Loss Vacuum filter Materialwater 2 Disposal 1.6 Disposal Liq. NH3 tank Disposal 0.3 18.5 NH3 21.4 recover 1.5 Steam6.2 Hou’s process NH4Cl take away 2.4 Evap. loss 6.8 system NH3 take away 1.5 NH3 evap. Evap. loss 14.1 27.7 Solution system bring to 2.7 21.6 2.7 Cons. Calcining Furnace gas take away 24 Hi-conc. tail water to salt solution system Soda ash tie water 3.7 System reutilize 23.4 Fig. 4-6 Water Balance Figure (unit: 10,000t/a) 220.127.116.11 Analysis of material balance Table 4-14 shows the analysis of material balance. Tab. 4-14 Material Balance Table Unit: 10,000t/a Flow direction of material Waste water Feed material Waste Waste to synthetic NH4Cl Soda ash Waste gas Total water solid ammonia workshop NaCl 44.8 26.8207 17.4558 0.0004 0.2909 0.2322 44.8 NH3 13.2 12.7324 0.0045 0.0156 0.1343 0.3132 13.2 0.0105 CO2 15.2 7.5916 0.0001 0.1603 0.1505 15.2 (7.2870 for recycle use) 0.0261 Total 73.2 39.5531 25.0474 0.0050 0.5855 0.6959 73.2 (7.5979 for recycle use) 60 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 4.5.6 Emission of main pollutants of soda ash project 18.104.22.168 Pollution source of waste gas After the soda ash project is implemented, waste gas mainly comes from tail gas of carbonizing tower, tail gas of filtration, NH3 from ammonia I and II barrels and tail gas of dry ammonium. Carbonization tail gas goes through the lower section of multipurpose recovery tower and is washed with mother liquid I to recover NH3, then is discharged from a 25m-high aiutage, with an exhaust capacity of 102.40 million m3/a. The purified tail gas has an ammonia concentration of 158mg/m3, the annual NH3 exhaust capacity is about 16.2t. Filtration tail gas goes through the upper section of multipurpose recovery tower and is washed with water to recover NH3, then is discharged from a 25m-high aiutage, with an exhaust capacity of 191.82 million m3/a. The purified tail gas has an ammonia concentration of 20mg/m3, the annual NH3 exhaust capacity is about 3.8t. Tail gas of calcining furnace contains main pollutants including CO2, powder (Na2CO3), and NH3. After whirlwind dedusting, soda washing of hot soda tower, condensation, washing, CO2 is recovered for soda making. Generally, waste gas is discharged only when the production starts or stops, no waste gas is discharged in normal operation. Powder produced in the work section of dry ammonium is discharged after bagroom dedusting. The tail gas exhaust capacity is about 8,000 m3/a. After dedusting, the powder discharge concentration is about 80 mg/m3, the annual soda powder discharge capacity is 6.4t. Powder produced in the work section of packing is discharged after bagroom dedusting. The tail gas exhaust capacity is about 16,400 m3/a. After dedusting, the powder discharge concentration is about 100 mg/m3, the annual soda powder discharge capacity is 16.4t. Inorganized waste gas discharge mainly exists in the ammonia absorber system and Hou’s process system. The existing project has serious exceeding-standard problem in inorganized ammonia gas discharge and lacks corresponding treatment facility. After the new project is implemented, a sealing system shall be added at the ammonium chloride conveying belt, and a gas collecting device shall be added at the ammonia absorber, about 80% of inorganized ammonia gas shall be collected. The recovered ammonia gas shall enters the ammonia absorbing system. At the same time, aged or corrodent facilities of the old system shall be replaced to reduce the release and leakage phenomenon in the production course. The above measures shall greatly reduce the discharge capacity of irorganized ammonia gas. After the project is implemented, inorganized NH3 discharge capacity shall be 136t/a. 61 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project NH3 discharge executes class II standard of GB14554-93 Foul Smell Pollutant Discharge Standard; tail gas of calcining furnace executes class II standard of GB9078-1996 Industrial Furnace Atmosphere Pollutant Discharge Standard; waste gases of the other technical processes execute class II standard of GB16297-96 Atmosphere Pollutant Comprehensive Discharge Standard. After the soda ash project is implemented, the multipurpose recovery tower has an annual carbonization tail gas discharge capacity of 102.40 million Nm3 and an annual filtration tail gas of 191.82 million Nm3, in which, the annual NH3 discharge capacity is 20t; the work section of dry ammonium has an annual waste gas discharge capacity of 8,000m3; the work section of packing has an annual waste gas discharge capacity of 164 million Nm3, in which, the annual powder discharge capacity is 22.8t; the NH3 inorganized discharge capacity is 136t/a. Table 4-15 shows the waste gas discharge of the soda ash project. Tab. 4-15 Waste Gas Discharge of Soda Ash Project Discharge concentration and Discharge standard Waste gas capacity Aiutage Pollution Treatment capacity height NH3 Powder source method 10,000Nm3/a NH3 Powder m (Kg/h) (mg/Nm3) Multipurpose 16.2t/a Carbonization 10240 recovery (158mg/ Nm3, 25 14 tail gas tower 2.03 kg/h) Multipurpose 3.8t/a (20mg/ Filtration tail 19182 recovery Nm3, 25 14 gas tower 0.475kg/h) Dry 6.4t/a Whirlwind ammonium 8000 (80mg/ 20 120 dedusting section Nm3) 16.4t/a Packing Whirlwind 16400 (100mg/ 20 120 section dedusting Nm3) Inorganized 126t/a discharge Total 53822 146 t/a 22.8t/a 22.214.171.124 Pollution source of waste water After the soda ash project is implemented, carbonization tail gas washing liquid returns to mother liquid I barrel; washing liquid of ammonia I and II barrels tail gas and filtration tail gas and calcining furnace gas condensation liquid enter thin liquid ammonia tank, then goes through ammonia evaporation in the ammonia evaporating tower to return to the Hou’s process system for reutilization. Partial of it enters hot soda tower for soda washing and then 62 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project returns to vacuum filter for washing water, partial of it is used for complementing mother liquid. The High-concentration tail water in the ammonia evaporating tower has high-concentration chlorin ion and enters the salt solution system for solvent, with no discharge of waste water. The oil-containing waste water produced by refrigerator and condensator goes through oil recovery in the oil collecting device, then enters ammonia absorber for NH3 recovery, with no discharge of waste water. The workshop washing water goes through oil and ammonia recovery treatment, partial of it returns to the Hou’s process system for reutilization, partial of it flows into the factory’s terminal waste water treatment plant for treatment, with an annual discharge capacity of 3,000t, which contains NH3-N 0.47t (157mg/L), COD 0.54t (180mg/L), SS0.63t (210mg/L) and oil 0.017t (5.7mg/L). The domestic sewage (treated in septic tank, then flows into the factory’s terminal waste water treatment plant for treatment) has an annual capacity of 16,000t, which contains NH3-N 0.6894t (86.17mg/L), COD 1.1251t (140.64mg/L), SS 0.781t (97.63mg/L), oil 0.0058t (0.73mg/L). The exchanged water of circulation water flows into the factory’s terminal waste water treatment plant for treatment. In accordance with Soda Ash Industrial Pollutant Discharge Standard (draft requesting opinions, March 2005), making soda ash with Hou’s process can realize complete recovery ad utilization of technical waste water, with no discharge of waste water. In theory, it is feasible. However, realizing zero discharge of technical waste water needs the premise of having high technical management level, strengthening maintenance of the facilities to prevent fault and reducing release and leakage phenomenon in the production course. Only the above requirements are satisfied, can zero technical waste water be discharged outwards. After the treatment of the factory’s terminal waste water treatment plant, the domestic sewage and production waste water of the soda ash project can be used in all water consumption working procedures of the whole factory. The factory’s terminal waste water treatment plant can realize pollutant removal efficiencies as follows: COD 80%, NH3-N 70%, SS 80%, oil 30%. Table 4-16 shows the waste water discharge state of the soda ash project. 63 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 4-16 Waste Water Discharge of Soda Ash Project Max. discharge flow No. Source of waste water 3 Water quality composition (m /h) NH3-N 157mg/L, COD 180mg/L, 1 Floor washing 0.375 SS 210mg/L, oil 5.7mg/L Circulation water 2 23.125 Clean water discharge system Domestic sewage and NH3-N 86mg/L, COD141mg/L, 3 2.0 others SS 98mg/L, oil 0.7mg/L 126.96.36.199 Pollution source of waste solid Waste solid of the soda ash project mainly comes from the salt mud depositing in mother liquid II storage tank and clarifier, with an annual salt mud capacity of 7,700t. The main composition of the waste solid is as follows: NaCl 29%, CaCO312.5%, NH4Cl 11%, MgCO313.4%, NH4HCO315%, and water content. The waste solid has a dry base quantity of 6,540t/a, its attribute is class I common industrial waste solid. Since the waste solid contains plentiful NH4Cl and NH4HCO3, the waste solid is transported to Zixing City Fangzhou Company (under Chenzhou Chemical Industry Group) for composite fertilizer production. In addition, the project produces 80t/a domestic garbage, which is transported to the urban garbage disposal plant for centralized treatment. 188.8.131.52 Pollution source of noise Noise mainly comes from various fans and facilities (see Table 4-17). The sound level is 85-95dB (A). After sound insulation of workshops and distance attenuation, the factory boundary noise can reach the standard. Tab. 4-17 Noise Discharge of Soda Ash Project No. Noise source Facility number (set) Noise intension dB (A) 1 Cooling tower 8 85 2 Water pump 27 85 3 Blower 7 95 4 Draught fan 2 90 4.6 Treatment measure and plan for environmental protection 4.6.1 Waste gas treatment measure a) Tail gas treatment measure of residual heat utilization project The residual heat utilization project’s flue gas mainly contains such pollutants as SO2, CO2 and soot dust. The combined dust catcher used for the 3-waste fluidized 64 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project mixed-combustion furnace enjoys such characteristics as saving energy, high efficiency and less pollutant emission, with a dedusting efficiency of 99.86%. In addition, the project adopts 100-meter-high chimney to discharge the flue gas and benefit the dilution and pervasion of atmosphere pollutants. Dedusting Regarding soot dust control measure, the factory adopts bagroom dust catcher with excellent dedusting efficiency. As an advanced dedusting equipment, bagroom dust catcher can realize perfect soot dust treatment. Its feasibility is mainly described as follows: a) The dedusting efficiency is not impacted by grain size of powder, small grains whose size is below 5μm and big grains can realize excellent dedusting efficiency. The dedusting efficiency can reach 99.86% above. The treated gas has a dust content of ≤35000× (1-0.9986) =49mg/Nm3; b) With no phenomenon that polar plate is glued with dust; c) Fairly strong applicability to coal quality and flue gas ; d) When dust content of flue gas is too high, dedusting efficiency shall not be impacted.; e) Fairly strong applicability to change of specific resistance; By making an investigation on the boiler dedusting effect of such domestic enterprises as Henan Yulong Group, Nanjing Xiexin Thermoelectricity Company and Shahe City Taihang Mining Company, we find out that the above-mentioned enterprises adopt bagroom deduster to control flue gas of their circulation fluid-bed boilers and have realized dedusting efficiency of 99.86% above. After dedusting, the flue gas can realize up-to-standard discharge. ② Desulfurization In accordance with the standard execution letter on this project issued by Chenzhou Municipal Bureau of Environmental Protection, the SO2 discharge of the 3-waste fluidized mixed-combustion furnace executes the standard of Thermal Power Plant Atmosphere Pollutant Discharge Standard (GB13223-2003), that is, SO2≤400mg/m3. Since the SO2 concentration of the blowing gas entering the 3-waste fluidized mixed-combustion furnace is only 250 mg/m3, and the flue gas quantity discharged from the the 3-waste fluidized mixed-combustion furnace shall further increase, it is calculated that the SO2 concentration of the blowing gas is only 200 mg/m3. It can realize up-to-standard discharge. 65 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project High chimney discharge The project adopts chimney with a geometry height of 100m. Since the chimney is high enough to produce thermal lifting effect, and the atmosphere can bring self purification effects including mixture, pervasion and dilution, the pollutant concentration can be greatly reduced, and the boiler flue gas shall do little harm to the neighboring atmosphere environment. In addition, the flue and chimney are equipped with fixed flue gas on-line monitoring device to continuously monitor the discharge of soot dust, SO2 and NO2, calculate their instantaneous value and accumulated value, implement real-time monitoring of the flue gas discharge state of the boiler, and realize stable up-to-standard discharge. b) Waste gas treatment measure of soda ash project ① Filtration tail gas goes through the multipurpose recovery tower for water washing, carbonization tail gas goes through the multipurpose recovery tower for mother liquid I, finally they are discharged from 25m-high aiutage. ② Tail gas of calcining furnace goes through whirlwind dedusting, soda washing of hot soda tower, condensation of condensating power and washing of washing tower, finally CO2 is recovered from the waste gas for soda making. Table 4-18 shows the waste gas treatment facilities. Tab. 4-18 List of Waste Gas Treatment Facilities No. Pollution source Treatment measure Aiutage height Discharge result 1 Carbonization tai gas Recovery tower treatment 25m Up to standard 2 Filtration tail gas Recovery tower treatment 25m Up to standard Tail gas of ammonia I 3 Recovery tower treatment 25m Up to standard and II barrels Whirlwind dedusting, soda washing, condensation 4 Calcination tail gas No discharge Up to standard washing, CO2 recovery in recovery tower Dry ammonium tail 5 Bagroom deduster treatment 5m above roof Up to standard gas 6 Packing tail gas Bagroom deduster treatment 5m above roof Up to standard 4.6.2 Waste water treatment measure a) Waste water treatment measure of residual heat utilization project The waste water has a discharge flow of 2m3/h. After treatment of the factory’s terminal waste water treatment plant, the waste water is used in all water consumption working 66 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project procedures of the whole factory, with no discharge. b) Waste water treatment measure of soda ash project After the soda ash project is implemented, carbonization tail gas washing liquid returns to mother liquid I barrel; washing liquid of ammonia I and II barrels tail gas and filtration tail gas and calcining furnace gas condensation liquid enter thin liquid ammonia tank, then goes through ammonia evaporation in the ammonia evaporating tower to return to the Hou’s process system for reutilization. Partial of it enters hot soda tower for soda washing and then returns to vacuum filter for washing water, partial of it is used for complementing mother liquid. The High-concentration tail water in the ammonia evaporating tower has high-concentration chlorin ion and enters the salt solution system for solvent, with no discharge of waste water. The domestic sewage and partial workshop washing water flows into the factory’s termial sewage disposal system for treatment, with no discharge. c) Feasibility of waste water “zero discharge” of the project In this project, the waste water needing outwards discharge contains waste water of boiler circulation water system (mainly containing salt), domestic sewage produced by the soda ash project, waste water of circulation water system and partial workshop washing water (mainly containing low-concentration COD and NH3-N), with a total flow of 27.5 t/h. After the “double 20 project” is completed, the whole factory’s waste water quantity entering the terminal waste water treatment plant is 150t/h. The designed treatment capacity is 200t/h, and the designed treatment process is A/O technology, therefore, both the treatment capacity and treatment process can satisfy the waste water treatment and recycle requirement of the project. 4.6.3 Waste solid treatment measure a) Waste residue of gas-making 3-waste fluidized mixed-combustion furnace Since the slag produced by the 3-waste mixed-combustion furnace has low thermal value, it is cannot be mixed with fuel coal for fuel utilization. We suggest it to be transported out of the factory with closed trucks for building material production and comprehensive utilization. b) Salt mud The soda ash project has an annual salt mud output of 7,700t. The main composition of the waste solid is as follows: NaCl 29%, CaCO312.5%, NH4Cl 11%, MgCO313.4%, NH4HCO315%, and water content. The waste solid has a dry base quantity of 6,540t/a, its attribute is class I common industrial waste solid. Since the waste solid contains plentiful NH4Cl and NH4HCO3, the waste solid is transported to Zixing City Fangzhou Company 67 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project (under Chenzhou Chemical Industry Group) for composite fertilizer production. c) Domestic garbage The domestic garbage is transported to the urban garbage disposal plant for centralized treatment. 4.6.4 Noise control measure a) Choose low-noise facilities. b) The main control room, on-duty room, on-watch room, operating room and rest room adopt double-deck window and door and high-performance building enclosure; all holes and seams are filled and sealed; sound-insulation tansom are used. The above measures can reduce the noise of working posts by 20~40dB (A). c) Mount high-efficiency mufflers Blowers and draught fans are equipped with high-efficiency mufflers to reduce noise by 10~20dB (A). d) Control pipe airflow speed In the design, the pipe airflow speed is controlled at the speed of 10~20m/s. Reduce the number of pipe elbows, avoid sudden change of pipe section, choose low-noise valves. e) Keep noise-resisting distance The design pays attention to overall arrangement, rational layout, proper noise-resisting distance, lowering the positions of noisy facilities, rationally arranging buildings according to their functions, implementing landscaping, and setting up noise-resisting structures if necessary. f) Control construction noise Since the construction site is close to the production area, construction facilities with high noise such as diesel pile driver shall not be used. 4.6.5 Landscaping In order to improve the employees’ working and living environment, the factory shall make great efforts to carry out landscaping work, for it can purify air, reduce noise and prevent pollution. Therefore, enough landscaping area is considered in the overall plane layout for the project. 4.7 Analysis of change of pollutant discharge quantities before and after technical transformation This technical transformation project is also an environmental protection project. The gas-making 3-waste mixed-combustion furnace project not only make use of the residual heat, 68 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project but also settles the problem that waste gas, waste residue and waste ash are difficult to treat in the gas-making production. The carbon dioxide multipurpose utilization project not only makes use of surplus CO2 to produce soda ash and ammonium chloride, but also adopts advanced Hou’s soda manufacture process to greatly increase raw material utilization rate and greatly reduce ammonium chloride residue. Table 4-19 shows the comparison of pollutant discharge before and after technical transformation. Tab. 4-19 Comparison of Pollutant Discharge before and after Technical Transformation Discharge of Total discharge after Discharge Discharge of Item technical technical transformation Increased/reduced Pollutant of existing under-construction compared transformation exsiting+under-construction+ discharge project project project technical transformation Waste gas 343000 210000 －138000 415000 －138000 10,000 Nm3/a SO2 t/a 362 266 －164 464 －164 Waste gas Soot dust t/a 332 84 －64 312 －64 Ammonia t/a 52 56 146 254 202 CO2 t/a 184415 276622 - 449511 11526 -172889 Waste water 30.12 -30.12 million 0 0 0 t/a million COD t/a 12.16 -12.16 0 0 0 Waste water NH3-N t/a 7.74 -7.74 0 0 0 CN- t/a 0.40 -0.40 0 0 0 Oil t/a 0.025 -0.025 0 0 0 The analysis in the above table shows this technical transformation project sets up one 75t/h 3-waste mixed-combustion furnace to replace the 75t/h circulation fluid-bed boiler, which is planned to build in the stage-2 thermoelectricity joint production project. Since 3-waste mixed-combustion furnace takes gas-making blowing gas as fuel, its discharged SO2 is the transfer of the discharged SO2 of the gas-making blowing gas of the “double 20” project being built by Qiaodan company. Therefore, after the technical transformation, the whole factory shall reduce SO2 waste gas pollutant discharge by 164t/a, reduce soot dust discharge by 64t/a, increase NH3 discharge by 202t/a and reduce CO2 discharge by 172,889t/a; no waste water is discharged, this means reducing COD discharge by 12.16t/a, NH3-N by 7.74t/a, CN- by 0.40t/a and oil by 0.025t/a. Additionally, 128.69×106kg/h heat energy is recovered, this means saving 35,300t standard coal and reducing CO2 discharge by 172,889t/a. It is very clear that the technical transformation project is very beneficial to energy saving and emission reduction. 69 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 70 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 5 Investigation and assessment of actuality of environmental quality 5.1 Regional pollution source Table 5-1 shows the regional pollution source of the project site. Tab. 5-1 Investigation of regional pollution source of project site in 2008 Industrial Main pollution factor Industrial Domestic waste Pollution discharger waste gas sewage COD NH3-N SO2 Remark water (10,000m3/a) (t/a) t/a t/a t/a (t/a) Qiaodan Company / 343000 38000 7.60 1.14 362 Completed Stop production Hongqi Paper Mill 88000 60000 8000 126 58 735 in 2008 Qiaokou Town / / 96000 19.2 2.88 Completed Liyujiang Power Plant B / 2673000 / 3652 Completed Chenhua Yangtao Under Chemical Industry / 43200 / 374 construction Company The above table reflects that, in the assessed region, Hongqi Paper Mill is the main water polluting enterprise, which discharges COD by 126t/a, and Liyujiang Power Plant B is the main atmosphere polluting enterprise, which discharges SO2 by 3,652t/a. 5.2 Investigation and assessment of actuality of environmental air quality 5.2.1 Monitoring and assessment of actuality of environmental air a) Distribution of monitoring points During the project assessment, Chenzhou City Environmental Monitoring Station implemented on-the-site monitoring in the assessed region of the project site. Three environmental air monitoring points were set up, please refer to Table 5-2. Tab. 5-2 Distribution of Monitoring Points Environmental Relative distance No. Monitoring point Relative orientation function (km) 1 Qiaokou Town Government Official business E 1.7 2 Qiaodan Residential Quarters Factory residence S 0.2 3 Longwan Village Ural residence NW 1.2 b) Items monitored SO2, NO2, CO, carbinol, H2S, NH3, TSP, PM10 etc. c) Weather parameters for atomesphere monitoring 71 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Table 5-3 shows local weather parameters. Tab. 5-3 Record of Weather Parameters for Atomesphere Monitoring Monitor Wind Wet-bulb Air Wind Temp. Humidity -ing Monitoring time Weather speed temp. pressure point direction (℃) (%) (m/s) (℃) (KPa) 7:00 Sunny SE 1.3 28.2 25.7 82 99.9 11:00 Sunny SE 2.6 34.0 27.0 62 100.1 Aug. 19th 14:00 Sunny SW 2.2 38.5 26.0 46 99.8 19:00 Sunny SW 2.7 38.8 27.3 64 99.5 7:00 Sunny SW 0.7 27.8 25.8 86 99.7 11:00 Sunny SW 1.2 34.8 26.8 58 99.8 Aug. 20th 14:00 Sunny SW 1.7 36.3 26.3 52 99.7 19:00 Sunny SW 2.1 32.0 25.5 64 99.4 7:00 Sunny SW 0.8 27.7 25.7 85 99.4 11:00 Sunny SW 1.2 32.4 25.4 60 99.7 Aug. 21st 14:00 Sunny SW 2.3 34.0 27 62 99.6 19:00 Sunny SW 1.7 29.9 26.9 79 99.3 7:00 Sunny SW 1.3 26.4 25.4 91 99.4 11:00 Sunny SW 1.1 31.0 27.5 77 99.6 Aug. 22nd 14:00 Sunny SW 1.3 27.4 23.4 74 99.5 19:00 Sunny SW 0.9 29.9 27.4 82 99.3 7:00 Sunny SW 0.8 25.7 25.2 96 99.5 11:00 Sunny SW 1.3 30.3 27.3 80 99.6 Aug. 23rd 14:00 Sunny S 3.0 32.5 26.5 65 99.5 19:00 Sunny S 2.9 29.7 26.2 77 99.3 e) Monitoring result of atmosphere environment actuality Table 5-4 shows the monitoring result of atmosphere environment actuality. 72 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 5-4 Monitoring Result of Atmosphere Environment Actuality mg/m3 SO2 NO2 CO carbinol H2S NH3 TSP PM10 Point Date Hourly Daily Hourly Daily Hourly Daily Hourly Daily Hourly Daily Daily Daily value value value value value value value value value value value value 0.015 0.016 0.6L 0.1L 0.006L 0.016 Aug. 0.019 0.017 0.6L 0.1L 0.006L 0.011 0.011 0.004 0.6L 0.007L 0.084 0.064 19th 0.020 0.021 0.6L 0.1L 0.006L 0.013 0.025 0.020 0.6L 0.1L 0.006L 0.011 0.011 0.017 0.6L 0.1L 0.006L 0.012 Aug. 0.015 0.020 0.6L 0.1L 0.006L 0.011 0.010 0.004 0.6L 0.007L 0.088 0.063 20th 0.015 0.022 0.6L 0.1L 0.006L 0.013 Qiaokou Town Government 0.019 0.021 0.6L 0.1L 0.006L 0.011 0.012 0.014 0.6L 0.1L 0.006L 0.012 Aug. 0.017 0.016 0.6L 0.1L 0.006L 0.014 0.009 0.004 0.6L 0.007L 0.080 0.057 21st 0.019 0.019 0.6L 0.1L 0.006L 0.012 0.015 0.018 0.6L 0.1L 0.006L 0.012 0.015 0.015 0.6L 0.1L 0.006L 0.114 Aug. 0.016 0.016 0.6L 0.1L 0.006L 0.011 0.009 0.004 0.6L 0.007L 0.079 0.063 22nd 0.016 0.019 0.6L 0.1L 0.006L 0.011 0.018 0.017 0.6L 0.1L 0.006L 0.014 0.010 0.015 0.6L 0.1L 0.006L 0.012 Aug. 0.013 0.018 0.6L 0.1L 0.006L 0.011 0.009 0.004 0.6L 0.007L 0.075 0.059 23rd 0.015 0.018 0.6L 0.1L 0.006L 0.011 0.016 0.017 0.6L 0.1L 0.006L 0.014 0.015 0.012 0.6L 0.1L 0.006L 0.016 Aug. 0.013 0.017 0.6L 0.1L 0.006L 0.018 0.012 0.005 0.6L 0.007L 0.078 0.062 19th 0.023 0.022 0.6L 0.1L 0.006L 0.021 0.023 0.022 0.6L 0.1L 0.006L 0.021 Qiaodan Residential Quarters 0.015 0.017 0.6L 0.1L 0.006L 0.012 Aug. 0.025 0.022 0.6L 0.1L 0.006L 0.013 0.011 0.005 0.6L 0.007L 0.070 0.052 20th 0.023 0.024 0.6L 0.1L 0.006L 0.016 0.025 0.025 0.6L 0.1L 0.006L 0.015 0.017 0.015 0.6L 0.1L 0.006L 0.012 Aug. 0.020 0.018 0.6L 0.1L 0.006L 0.015 0.010 0.005 0.6L 0.007L 0.083 0.059 21st 0.022 0.022 0.6L 0.1L 0.006L 0.019 0.025 0.020 0.6L 0.1L 0.006L 0.014 Aug. 0.019 0.011 0.016 0.005 0.6L 0.6L 0.1L 0.007L 0.006L 0.014 0.078 0.047 22nd 0.023 0.020 0.6L 0.1L 0.006L 0.016 0.023 0.020 0.6L 0.1L 0.006L 0.017 73 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project SO2 NO2 CO carbinol H2S NH3 TSP PM10 Point Date Hourly Daily Hourly Daily Hourly Daily Hourly Daily Hourly Daily Daily Daily value value value value value value value value value value value value 0.025 0.019 0.6L 0.1L 0.006L 0.016 0.014 0.015 0.6L 0.1L 0.006L 0.012 Aug. 0.020 0.018 0.6L 0.1L 0.006L 0.014 0.010 0.005 0.6L 0.007L 0.063 0.049 23rd 0.025 0.020 0.6L 0.1L 0.006L 0.016 0.025 0.019 0.6L 0.1L 0.006L 0.016 0.015 0.012 0.6L 0.1L 0.006L 0.011 Aug. 0.019 0.017 0.6L 0.1L 0.006L 0.013 0.011 0.004 0.6L 0.007L 0.069 0.053 19th 0.018 0.018 0.6L 0.1L 0.006L 0.013 0.019 0.015 0.6L 0.1L 0.006L 0.011 0.019 0.015 0.6L 0.1L 0.006L 0.012 Aug. 0.021 0.017 0.6L 0.1L 0.006L 0.011 0.010 0.004 0.6L 0.007L 0.077 0.056 20th 0.017 0.020 0.6L 0.1L 0.006L 0.013 0.021 0.017 0.6L 0.1L 0.006L 0.013 Longwan Village 0.015 0.013 0.6L 0.1L 0.006L 0.013 Aug. 0.020 0.017 0.6L 0.1L 0.006L 0.014 0.009 0.004 0.6L 0.007L 0.069 0.045 21st 0.017 0.019 0.6L 0.1L 0.006L 0.012 0.017 0.018 0.6L 0.1L 0.006L 0.012 0.016 0.014 0.6L 0.1L 0.006L 0.011 Aug. 0.018 0.016 0.6L 0.1L 0.006L 0.013 0.009 0.004 0.6L 0.007L 0.056 0.050 22nd 0.018 0.017 0.6L 0.1L 0.006L 0.013 0.020 0.016 0.6L 0.1L 0.006L 0.013 0.011 0.013 0.6L 0.1L 0.006L 0.011 Aug. 0.016 0.015 0.6L 0.1L 0.006L 0.013 0.010 0.004 0.6L 0.007L 0.059 0.049 23rd 0.020 0.017 0.6L 0.1L 0.006L 0.013 0.021 0.077 0.6L 0.1L 0.006L 0.011 5.2.2 Assessment of actuality of environmental air quality a) Assessment parameters SO2, NO2, TSP, PM10, CO, H2S, NH3, carbinol etc. b) Assessment method Over-standard rate and over-standard multiple method c) Assessment standards Table 5-5 shows the assessment standards. 74 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 5-5 Assessment Standards 3 Assessment Standard value mg/m Standard adopted parameter Hourly conc. Daily conc. Class II standard of Environmental Air Quality Standard SO2 0.50 0.15 GB3095-96 Class II standard of Environmental Air Quality Standard NO2 0.24 0.12 GB3095-96 Class II standard of Environmental Air Quality Standard TSP 0.30 GB3095-96 Class II standard of Environmental Air Quality Standard PM10 0.15 GB3095-96 Class II standard of Environmental Air Quality Standard CO 10.0 4.0 GB3095-96 Class II standard of Foul Smell Pollutant Discharge Standard NH3 1.0 GB14554-93 Table 1 Class II standard of Foul Smell Pollutant Discharge Standard H2S 0.01 GB14554-93 Table 1 Max. allowable residential quarter concentration of Industrial Carbinol 3.0 Enterprise Design Sanitation Standard TJ36-79 e) Assessment result Table 5-6 shows the assessment result. Tab. 5-6 Environmental Air Actuality Assessment Result SO2 NO2 CO Carbinol H2S NH3 TSP PM10 Assessment Point item Hourly Daily Hourly Daily Hourly Daily Hourly Daily Hourly Hourly Daily Daily conc. conc. conc. conc. conc. conc. conc. conc. conc. conc. conc. conc. Sample 20 5 20 5 20 5 20 5 20 20 5 5 number Qiaokou Town Government Max. conc. 0.023 0.011 0.021 0.004 0.6L 0.6L 0.1L 0.007L 0.006L 0.014 0.088 0.064 mg/m3 Over-standard 0 0 0 0 0 0 0 0 0 0 0 0 rate % Max. over- standard 0 0 0 0 0 0 0 0 0 0 0 0 multiple Sample 20 5 20 5 20 5 20 5 20 20 5 5 Qiaodan Residential number Max. conc. 0.025 0.012 0.025 0.005 0.6L 0.6L 0.1L 0.007L 0.006L 0.021 0.080 0.062 Quarters mg/m3 Over-standard 0 0 0 0 0 0 0 0 0 0 0 0 rate % Max. over- standard 0 0 0 0 0 0 0 0 0 0 0 0 multiple Sample 20 5 20 5 20 5 20 5 20 20 5 5 number Longwan Village Max. conc. 0.021 0.011 0.020 0.004 0.6L 0.6L 0.1L 0.007L 0.006L 0.014 0.077 0.053 mg/m3 Over-standard 0 0 0 0 0 0 0 0 0 0 0 0 rate % 75 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Max. over- standard 0 0 0 0 0 0 0 0 0 0 0 0 multiple The above amentioned result reflects that the project region enjoys relatively good environmental air quality and all monitored items are up to class II standard of Environmental Air Quality Standard GB3095-96 and other relevant standards. 5.3 Investigation and assessment of actuality of water environmental quality This assessment has collected the normal surface water actuality monitoring data on Dongjiang river reach implemented by Chenzhou City Environment Monitoring Station in the recent years. a) Monitoring sections In accordance with such factors as water regime of the Lei River, water discharge position of the project and water quality state of the functional area, we arranged 2 monitoring sections within the scope of the assessed reach, please refer to Table 5-7. Tab. 5-7 Concrete Positions of Water Quality Monitoring Sections Section Section Section Monitoring period and Monitoring item No. name position frequency Upper The monitoring sections Qingjiang 1 reaches adopt routine monitoring Bridge pH, DO, CODMn, CODcr, BOD5, 19km sections of Chenzhou City NH3-N, SS, Cu, Zn, fluoride, Se, As, Environment Monitoring Hg, Cd, Cr, Pb, oil, hydroxybenzene, Station. The water quality Lower sulfide, cyanide, anion surface active 2 Huangnitan assessment adopts reaches 3km solvent, coliform ect. 2007-2008 routine monitoring data. b) Water quality analysis method The sampling and analysis method complies with the relevant requirements of Environment Monitoring Technical Standards (part of surface water environment) published by State Bureau of Environmental Protection. c) Water quality monitoring result Table 5-8 shows the water quality monitoring result of all sections. The table reflects that all assessed factors of the two monitoring sections are up to class III standard of Surface Water Environmental Quality Standard GB3838-2002. 76 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 5-8 Chenzhou City 2007-2008 Lei River Routine Section Water Quality Unit: mg/L (excluding water temp. and pH) Hydroxybenzene Anion surface active solvent Coliform (/L) Fluoride Cyanide Section Sulfide Time Temp. Oil pH DO CODMn CODCr BOD5 NH3-N SS Cu Zn Se As Hg Cd Cr Pb (yy.m) (℃) 07.01 12 7.63 7.51 2.9 8.2 1.6 0.101 0.095 0.001 0.05 0.02L 0.0005 0.0033 0.00005 0.001 0.004 0.01 0.002 0.002 0.03 0.05 0.004 700 Qingjiang Bridge 07.04 12 7.12 6.13 2.0 5.0L 1.89 0.120 0.132 0.001L 0.05L 0.02L 0.0008 0.0176 0.00005L 0.001L 0.004L 0.0130 0.002L 0.002L 0.02L 0.05L 0.004L 5400 07.07 22 7.61 5.87 1.80 16.50 2.23 0.187 0.135 0.001L 0.05L 0.02L 0.00049 0.0305 0.00005L 0.001L 0.004L 0.0100 0.004L 0.002L 0.03 0.05L 0.004L 2400 07.10 13 7.55 6.20 0.99 11.90 2.65 0.170 0.139 0.00087 0.05L 0.02L 0.0005 0.0146 0.00005L 0.00027 0.004L 0.001L 0.004L 0.002L 0.03 0.05L 0.004L 2800 08.01 18 7.60 5.81 0.62 6.80 1.96 0.171 0.139 0.0017 0.05L 0.02L 0.0001L 0.0163 0.00002L 0.00012 0.004L 0.002 0.004L 0.002L 0.03 0.05L 0.004L 2800 07.01 22 7.49 6.08 3.0 9.8 1.94 0.135 0.124 0.012 0.050 0.02 0.00028 0.0129 0.00005 0.003 0.004 0.019 0.002 0.002 0.03 0.05 0.004 1300 07.04 12 7.21 5.41 2.0 5.0L 2.29 0.159 0.143 0.0060 0.05L 0.02L 0.0002 0.0476 0.00005L 0.0012 0.004L 0.026 0.002L 0.002L 0.03 0.05L 0.004L 9200 Huangnitan 07.07 25 7.65 5.39 1.30 10.20 3.15 0.266 0.161 0.003 0.05L 0.02L 0.0003 0.0367 0.00005L 0.004 0.004L 0.026 0.004L 0.002L 0.03 0.05L 0.004L 5400 07.10 16 7.54 6.22 0.99 7.90 3.51 0.264 0.165 0.00092 0.05L 0.02L 0.00022 0.0102 0.00005L 0.00012 0.004L 0.001L 0.004L 0.002L 0.04 0.05L 0.004L 5400 08.01 15 7.52 5.16 0.62 6.80 2.74 0.266 0.165 0.0035 0.05L 0.02L 0.0001L 0.0273 0.00002L 0.00026 0.004L 0.0031 0.004L 0.002L 0.03 0.05L 0.004L 5400 08.04 15 7.26 5.36 0.61 6.80 3.15 0.178 0.093 0.0026 0.05L 0.02L 0.00026 0.0487 0.00001L 0.0004 0.004L 0.0062 0.004L 0.002L 0.03 0.05L 0.004L 2800 Class-Ⅲ -- 6~9 5 6 20 4 1.0 0.2 1.0 1.0 0.01 0.01 0.05 0.0001 0.005 0.05 0.05 0.2 0.005 0.05 0.2 0.2 10000 standard 77 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 5.4 Investigation and assessment of acoustic environment actuality a) Distribution of monitoring points The monitoring points are separately distributed at the east, south, west and north position of the factory boundary.. b) Monitoring time and frequency Monitoring time: August 20th Monitoring frequency: daytime, nighttime. c) Monitoring items: Leq, L10, L50, L90 d) Monitoring result Table 5-9 shows the factory-boundary noise monitoring result. Tab. 5-9 Factory-boundary Noise Monitoring Result Monitoring Monitoring Monitoring result dB (A) point frequency Leq L10 L50 L90 East of Daytime 54.9 56.6 54.5 52.2 factory boundary Nighttime 49.6 53.0 46.1 44.4 South of Daytime 58.2 58.2 52.5 49.4 factory boundary Nighttime 55.0 56.1 54.6 53.8 West of Daytime 55.2 57.0 54.9 52.8 factory boundary Nighttime 52.2 53.9 51.8 51.0 North of Daytime 49.8 50.1 47.2 45.6 factory boundary Nighttime 44.3 45.9 43.5 41.6 e) Assessment standard The assessment adopts class II standard of Acoustic Environment Quality Standard GB3096-2008. Standard values: daytime 60 dB (A), nighttime 50 dB (A). f) Assessment method The assessment adopts comparison method, that is, compare the monitoring result with standard values. g) Assessment result The noise actuality monitoring result reflects that the regional acoustic environment quality accords with class II standard of Acoustic Environment Quality Standard GB3096-2008. 78 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 6 Analysis and prediction of environmental impact 6.1 Analysis of environmental impact during the construction 6.1.1 Analysis of atmosphere environmental impact during the construction a) Analysis of air environmental impact During the construction, the atmosphere pollutants mainly contain construction raise dust,vehicle exhaust gas and other construction waste gases. The construction raise dust mainly comes from old buildings demolishing , earth excavating and digging, land leveling, foundation construction, pipelines laying, road building, workshops and other auxiliary installations construction, concrete mixing, powder material transporting and piling up and so on. The construction raise dust is the main factor impacting the environmental air quality. Secondly, exhaust gas of vehicle and other engineering machinery contains such pollutants as CO, NO, THC etc. Additionally, bitumen is used in road construction and roof anti-leakage treatment. When bitumen is boiled, mixed and poured, it usually produces bitumen smoke, which contains poisonous matters such as benzene and hydroxybenzene. The bitumen smoke mainly impacts the leeward area of the construction site and its impact will not last a long time. b) Waste gas pollution control measures: 1) Harden and water the ground and roads of the construction site in time to reduce raise dust. 2) Sealed trucks must be adopted to transport earth and waste residue; washing device must be equipped in the construction site for washing the trucking leaving the construction site. 3) The place for processing bitumen must be far from the working area and residential quarter with dense population, and must be located at their leeward. 4) For powder material transporting and piling up, covering measure must be taken to prevent wind causing raise dust. 6.1.2 Analysis of water environmental impact during the construction a) Analysis of water environmental impact The water environmental impact during the construction mainly comes from construction waste water and domestic sewage of construction personnel. The construction waste water mainly contains road surface maintenance water, sand and stone washing water and pressure test water, whose main pollutant is SS. 79 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Secondly, it also contains waste water coming from engineering machinery repair and washing. The domestic sewage of construction personnel is organic waste water containing CODcr, BOD5, NH3-N etc. b) Water pollution control measures: 1) Temporary waste water treatment plant should be set up in the construction site, such treatment methods as sedimentation and oil separation can be used. 2) Untreated construction waste water and domestic sewage is forbidden to directly discharge into the Dongjiang River. 3) The factory should do well in the management and recovery of building materials and construction waste, especially smeary materials. Waste oil must be collected in oil barrels for periodical treatment and recovery. 6.1.3 Analysis of acoustic environmental impact during the construction a) During the construction, the acoustic environmental impact mainly comes from construction noise, secondly comes from traffic noise and man-made noise. The construction noise mainly comes from various construction machinery and installation equipments. The construction machinery have noise intensities as follows: Loading machine 94dB (A), bulldozer 86dB (A), excavator 84dB (A), pile driver 112dB (A), mixer 91dB (A), vibrator 84dB (A), truck 92dB (A), mobile hoist 96dB (A), pneumatic spanner 95dB (A), electric welding machine 85dB (A). The construction noise produces a faily big impact within 50m scope of the construction site, and produces a certain impact within 50~100m scope. Since the project is built in the factory of Qiaodan Company, The construction noise produces a certain impact to the inside area of the factory, and produces little impact to the outside areas of the factory. However, the impact of construction noise will not last for a long period, and it will ends upon the end of the construction activities. b) Noise pollution control measures: 1) Try their best to select low-noise construction machinery. 2) Make rational arrangement of construction task, try their best to avoid the phenomenon that many high-noise construction machines are used at the same place and at the same time. 3) try their best to take various sound insulation and noise reduction measures, e.g. planting trees and building sound insulation forest belt in time, setting up sound insulation wall at special area. 80 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 6.1.4 Analysis of waste solid impact during the construction Waste solid produced in the construction contains discarded earth, discarde stone, construction mud, waste residue, domestic garbage and so on. If the waste solid is not cleaned up or treated in time, it will flows with the surface runoff into water environment and causes water pollution when a storm occurs, or produces raise dust and impacts atomesphere environment when a strong wind occurs. Random piling up waste solid impacts the scenic image and environmental sanitation of the construction site. Therefore, the personnel concerned should carry out standardized construction, civilized construction and standardized transport, keep the construction clean and sanitary, clean up and carry away discarded earth and waste residue in time, and not randomly throw away domestic garbage. 6.2 Analysis of environmental impact during the operation 6.2.1 Prediction and assessment of environmental air impact 184.108.40.206 Prediction content a) Predict and analyze the positions where NH3 hourly concentration maximum value occurs and the impact state of attentioned points after the project goes into operation. b) Analyze the factory boundary neighboring environmental impact arising from inorganized discharge of waste gas discharge. c) Confirm the distance for sanitary protection. 220.127.116.11 Prediction means In accordance with the suggestion in Section 7.3 of HJ/T2.2-93, we adopt normal mode to implement the prediction. a) Max. landing concentration and distance We adopt the overhead point source prediction mode described in Technical Guide to Environmental Impact Assessment HJ/T2.2-93 and adopt computer optimization method to predict maximum landing concentration and distance. When wind occurs, we predict maximum landing concentration and distance according to the follwing formulas: 2Q C = e ⋅ π ⋅ u ⋅ P1 ⋅ H 2 m 8 H e 1/α 2 α 1 − (1 / 2 α 2 ) X = ( ) (1 + ) m r2 α2 81 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Where: Q —— discharge source intensity, mg/s; α 1 , α 2 , r1 , r 2 —— separately mean index and coefficient of horizontal and vertical pervasion parameters; P1—— calculation coefficient, described in HJ/T2.2-93. b) Overhead point source pervasion mode I. Source pervasion mode when wind occurs (U10≥1.5m/s) It is predicted according to the overhead point source prediction mode described in Section 7.5.1 of Technical Guide to Environmental Impact Assessment HJ/T2.2-93 Q y2 C = exp(− )⋅F 2 π u σ yσ z 2σ y 2 4 ⎧ ⎪ ⎡ 2nh − H e + Z ⎤ 2 2 ⎡ 2nh + H e + Z ⎤ ⎪⎫ 式 中 : F= ∑ ⎨exp ⎢− ⎥ + exp ⎢− ⎥ ⎬ ⎪ ⎣ 2σ z 2 ⎦ ⎣ 2σ z 2 ⎦ ⎪ N= 4 ⎩ ⎭ h—— Height of mixed layer (m); Z—— Geometry height from calculation point to aiutage ground (m); Q—— Discharge quantity in unit time (mg/s); Y—— Vertical distance from this point to the average wind direction axial line (m) ; δY —— Horizontal pervasion parameter (m) ; δ Z —— Vertical pervasion parameter (m) ; U—— Average wind speed of aiutage outlet (m/s) ; He—— Effective height of aiutage (m). II. Point source pervasion mode when small wind occurs (0.5m/s≤U10≤1.5m/s) Taking aiutage ground position as source point and average wind direction as X axis, the conventration C (mg/m3) of any ground point (X, Y) in less than 24 hours’ sampling time is calculated in the formula below: 82 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project γ 2 η 2 = X 2 + Y 2 + 01 ⋅ He2 γ 2 02 ⋅ ⎡1 + 2π ⋅ S ⋅ e s2 /2 ⋅ Φ ( s ) ⎤ 2 2 −U / 2γ G = e 01 ⎣ ⎦ s 1 Φ (s) = 2π ∫ −8 e − s 2 / 2 dt UX S = γ 0 1η c) Formula for predicting inorganized discharge area source In this project, its area source S≤1Km2. In accordance with the area source prediction mode suggested in Section 18.104.22.168 of the Guide, the prediction points outside the area source can be calculated in the point source pervasion mode, but it is σ σ σ necessary to amend pervasion parameters of y and z , the amended y and σ z are as follows: α1 α σ y = γ1X + v 4 .3 α H σ z = γ2X 2 + 2 .1 5 Where: X means distance from receiving point to central point of area source; α y —— area source length in Y direction; H means avaerage discharge height of area source; The other symbols are same as the above-mentioned. d) Daily average concentration prediction mode Choose typical weather condition and calculate daily average concentration of typical day in the formula below: 1 n C日 = n ∑ i =1 C 1小 时 e) Smoke prediction mode 83 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project ⎛ Q ⎞ ⎡ ⎛ Y 2 ⎞⎤ C = ⎜ ⎟ exp ⎢− ⎜ ⎟⎥ • Φ (P ) f ⎜ 2π U h f σ ⎟ ⎢ ⎜ 2σ 2 ⎟⎥ ⎝ yf ⎠ ⎣ ⎝ yf ⎠⎦ p = (h f − H e) /σ z Where: σ yf = σ y + H e /8 22.214.171.124 Choosing parameters The pervasion parameters under common weather condition adopt Tables B3 and B4 in Appendix B to Technical Guide to Environmental Impact Assessment—Atomephere Environment HJ/T2.2-93. Table 6-1 shows main pollution source discharge parameters. Tab. 6-1 Main Pollution Source Discharge Parameters Discharge Waste gas flow Discharge flow Pollution source 3 Main pollutant source height m /h kg/h Tail gas of Overhead SO2 28.13 mixed-combustion source 140455 Soot dust 6.88 furnace H=100m Filtration tail gas Area source 23978 NH3 0.475 Carbonization tail Area source 12800 NH3 2.03 gas 126.96.36.199 Prediction result a) Hourly concentration prediction I. Max. hourly concentration contribution value prediction result Under the selected hourly concentration weather condition, we predict the SO2 ground concentration contribution value under the weather conditions of average wind speed, static wind and smoke in normal production after the technical transformation project is completed. Table 6-2 shows the statistics of prediction result Tab. 6-2 Predicted values of SO2 max. hourly concentration and landing distance Predicted max. Max. Account for state Weather contribution value concentration Stability class II standard condition 3 and distance to mg/m % chimney m Upper layer class B Smoke 0.3660 73.2 491 Lower layer class E Average wind Class B 0.2384 47.68 671 speed Class D 0.2303 46.06 1549 84 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Predicted max. Max. Account for state Weather contribution value concentration Stability class II standard condition 3 and distance to mg/m % chimney m Class E 0.1886 37.32 2876 Class B 0.2186 43.72 174 Small wind Class D 0.2836 56.72 692 Class E 0.02822 5.64 1789 Class B 0.1808 36.16 Static wind Class D 0.1518 30.36 Class E 0.1428 28.56 The above table reflects that under worst weather condition the (smoke) SO2 hourly concentration contribution value accounts for 73.2% of the state class II standard. Under the weather conditions of average wind speed, small wind and static wind, the technical transformation project’s gas-type pollutant hourly concentration produces little impact to the neighboring environment. II. The project’s impact to eighboring attention points In accordance with the weather condition of the project, considering different wind speeds and stabilities, we calculate the projects’s newly-added pollution sources and attention points item by item. Table 6-3 shows the prediction result of all attention points. Tab. 6-3 SO2 Hourly Concentration Prediction Values of All Attention Points 3 Weather condition Max. concentration mg/m Account Attention point Wind Wind Superimpos Stabilit Contributi Backgrou for speed directio ed y on value nd value standard m/s n value % Qiaokou Town 1.6 SW D 0.1405 0.018 0.1585 31.7 Goverment Qiaodan Residential 1.6 NE D 0.1184 0.020 0.1384 27.68 Quarters Longwan Village 1.6 NNE D 0.1321 0.017 0.1491 29.82 The above table reflects that the technical transformation project produces little impact to all attention points. 188.8.131.52 Sanitary protection distance In accordance with the requirement of Technical Method on Constituting Local 85 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Atomesphere Pollutant Discharge Standard (GB/T13201-91), sanitary protection distance between inorganized discharge source and residential quarters is set up. The calculation formula is as follows: Qc 1 = ( B L c + 0 . 2 5 r 2 ) 0 .5 L D Qm A Where: Cm—— limit value of standard concentration, mg/m3; L—— Rational sanitary protection distance of industrial enterprise, m; r—— Equivalent radius of production unit in which harmful gas inorganized discharge source exists, m. It is calculated according to the area S (m2) of its r = ( S / π ) 0 .5 production unit, ; A, B, C, D—— Sanitary protection distance calculation coefficients; Qc—— Control level that industrial enterprise harmful gas inorganized discharge quantity can reach, kg/h. A — 400, B— 0.01, C— 1.85, D — 0.78, source from Table 5 of GB/T13201-91. Table 6-4 shows the calculation result of sanitary protection distance. Tab. 6-4 Sanitary Protection Distance Environmental quality Sanitary protection Pollutant Calculation result (m) standard (mg/m3) distance (m) NH3 0.2 380 400 The above calculation result reflects that this project needs a sanitary protection distance of 380m. In accordance the state standard, this project’s sanitary protection distance takes an integer of 400m. Therefore, we determine 400m as this project’s sanitary protection distance. The sensitive point which is nearest from the production device is the employees’ dormitory in the south, with a distance of about 50m. When implementing “Tiancheng District Resettlement Project”, Chenzhou Chemical Industrial Group promised to carry out a collective resettlement of the 108 households living in 7 residential buildings of Qiaodan Residential Quarters. At present, the residential district for resettlement is under construction. Qiaodan Company has stated that they will finish the resettlement before the technical transformation project goes into operation. Therefore, it is unnecessary for this project to implement additional resettlement, and 86 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project the environmental protection objects within the sanitary protection distance can meet the requirement and be properly treated. After the technical transformation project is implemented, the local government and land administration should strictly control the examination and approval of land utilization and residential houses building near the project site. Within the scope of the sanitary protection distance, any land utilization for residential house building and requiring high environmental air quality shall not be approved. 6.2.2 Prediction and assessment of water environmental impact The engineering analysis of this technical transformation project shows that the technical production course produces no waste water discharge, that is, zero discharge in theory. The total treatment process for treating the waster water produced by the whole project can realize zero discharge, but the real operation causes partial waste water overflow into the water environment of the Dongjiang River, therefore, the project’s impact scope and degree to the water environment of the Dongjiang River is consistent with the actual monitoring result on the whole, and the value added of water environmental impact is very low. 6.2.3 Prediction and assessment of acoustic environmental impact The project mainly has such high-noise facilities as blower, draught fan, water pump and cooling tower, with a noise intensity of 85~95dB (A). The industrial noise prediction mode is as follows: L (r) =L (ro) -20lg (r/ro) - L Where: L (r) : acoustic source’s octave band acoustic pressure level at the prediction point dB (A). L (ro) : octave band acoustic pressure level at ro reference point dB (A). r: distance from prediction point to acoustic source m. ro: distance from reference position to acoustic source m L: attenuation quantity caused by various factors dB (A). Table 6-5 shows the prediction result. Tab. 6-5 Noise Prediction Result of Outdoor Noise Sources with Different Distances Acoustic Leg dB (A) source intensity 10m 20m 40m 80m 100m dB (A) 95 75 69 63 57 51 87 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 90 70 64 58 52 46 85 65 59 53 47 41 Since this project takes such measures as sound insulation, noise reduction and noise elimination for all high-noise facilities, the actual state shall be better than the prediction result. This means that these high-noise facilities shall not cause factory boundary over-standard noise and shall not bring bad impact against the environment outdise the factory boundary. 6.2.4 Analysis of waste solid impact The main waste solid of this project contains the slag produced by the gas-making 3-waste fluidized mixed-combustion furnace and the salt mud residue. The slag is supplied to relevant enterprise for producing building material, the salt mud is supplied to cement factory for producing cement. It is very clear that such waste solid can be completely assimilated and shall not be stored up or discharged. The factory should strengthen the management of such waste solid, set up temporary site for storing up and covering the slag and salt mud to avoid effusion. During the transport of such waste solid, the operators should avoid the phenomenon of effusion and leakage. Especially when such waste solid is transported out of the factory, sealed trucks should be used to avoid spilling. If the above control measures are taken, the project shall not have its waste solid produce obvious bad impact against the neighboring environment. 88 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 7 Analysis of clean production 7.1 Requirement of clean production Clean production refers to the production process with least damage to human and nature. It continuously applies prevention strategy to the production and service of products so as to raise ecological efficiency and reduce the risk to human and nature. In production, clean production means to save all materials that can be saved, get rid of all toxic raw materials that can be replaced, and diminish waste discharge. In the product development and design process, it aims at reducing the negative impacts to environment from the choice of raw material to the final settlement of products. In product service, it requires to start from environment factors, make product serve human beings. At the same time of improving human’s living quality, it requires to cut down ecological damage and waste of resource so as to protect environment. This report will analyze clean production of the project from the angle of production process. 7.2 Analysis of advanced technology 7.2.1 Synthetic ammonia gas-making blowing gas and gas-making slag residual heat recovery project Residual heat recovery of synthetic ammonia gas-making blowing gas undergoes three changes. The combustion pattern of the first generation boiler is regenerative combustion. After heat storage by burning high heating value syngas, it burns the low heating value gas-making blowing gas to recover heat. The by product is steam. The second-generation boiler (commonly used today), based on the first generation, has increased gas nozzle and reduced the inner checker bricks. In the way, it reduces the resistance in the boiler and in the blowing gas process, and increases the burden of the gas-making boiler. At the same time, the smoke and gas can burn more completely and the steam can be self supported in the gas-making process. The first and second generation boilers can neither solve the problem of slag comprehensive utilization. The fluidized mixed-combustion boiler used by this project is a third generation product developed by Zhengda Thermal Energy Research Institute in Linyi, Shandong. Compared with the first and second generation products, its feature is that it burns the gas-making blowing gas by slag or coal, totally consumes the three wastes (gas, slag and ash), and produces steam with medium temperature and pressure. Thus the production system of synthetic ammonia realizes the target of two boilers to one and 89 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project two portions of coal to one. The production technology of fluidized mixed-combustion boiler for three wastes of gas-making is the most advanced technology so far. It can increase output, save energy, improve efficiency, settle down the comprehensive treatment problems of three wastes and protect the environment. 7.2.2 CO2 multipurpose utilization and emission reduction project This project fully utilizes CO2 produced by synthetic ammonia to produce soda and chloride products for the purpose of energy saving and emission reduction. This project applies thick gas soda making technology from Hou’s soda manufacturing process. This technology bears high utility ratio of raw material, for example the utility ratio of salt is over 90%. Besides, it consumes fewer raw materials. It does not need limestone and coke, cancels such heavy equipments as ammonia tower, limekiln and lime dissolving machine, simplifies production process, and saves energy and reduces production cost. What’s more, it covers less land, which can save a quarter of the investment for factory construction, and it fully takes advantage of the current resources. In this way, it reaches the target of energy saving and output increment. Therefore we say it is an advanced technology. 7.3 Analysis of energy saving and emission reduction a) The construction of the item of 75t/h fluidized mixed-combustion boiler for three wastes of gas-making in this project completely recovers the gas-making blowing gas and the heat from the loop. The recovered heat reaches 128.69×106kg/h, which is equivalent to save about 35,300t coals. b) The construction of the 40×104t/a soda CO2 multipurpose utilization and emission reduction project reduces the emission of CO2 about 172,889t/a. c) Among the Hou’s soda process equipments, there is no such high energy consumption machine as ammonia tower, limekiln and lime dissolving machine, and construction investment is saved. d) There are no obsolete products among the electromechanical equipments chosen by this project, and all the equipments are energy friendly. e) The pipe fittings and valves of national high quality will be well installed to avoid leakage. 7.4 Analysis of pollutant discharge This project is an environment friendly one, which can complete the overall treatment of synthetic ammonia gas-making blowing gas, slag and smoke, integrated 90 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project utilize CO2 from synthetic ammonia, and reduce the discharge of CO2 172889t/a. It is very advantageous for protecting atmospheric environment. This project produces fewer pollutants which are perfectly treated by measures, so it will not have negative impact to the atmospheric environment. This project produces little waste water with fewer pollutants, which will be treated by the waste water treatment system and recycled used after that, so it will not pollute the water environment. The project which builds a 75t/h fluidized mixed-combustion boiler for three wastes of gas-making to replace the 75t/h circulating fluidized bed boiler (CFB boiler) will not only reduce the consumption of coal and limestone, but also recycle the pollutants such as blowing gas in the synthetic ammonia production process. In this way, it not only comprehensively utilizes the energy but also saves energy and reduces emission. All the solid wastes produced in this project can be utilized comprehensively, and they will not pollute the environment as long as there is strict management of them. All in all, the clean production level of this project is of high level. 8. Evaluation of environment risk 8.1 Grade and content of environment risk evaluation According to HJ/T 169-2004 Technical Guide for Evaluation of Construction Project Environment Risk, the risk of this project is evaluated as extremely toxic and dangerous material, not major dangerous source. Therefore, the risk evaluation is Class B. In accordance with the requirement of the guide, simply analysis of source item and accident influence will be conducted, and measures of prevention and emergency will be put forward. 8.2 Analysis of source item 8.2.1 Max. credible accident Substance leakage from equipment damage or false operation, and the discharged toxic substances easy to burn and explode may lead to such serious accidents as fire, explosion and poison. The analysis of the accident result is usually undergone on the premise of hypothesis. According to Practical Technology and Method of Environment Risk Evaluation, there are two main leakages i.e. container damage (total breakage) and connector leakage (100% or 20% caliber). If there is a leakage, the chemical waste gas will expand to the air and pollute the surrounding gas. If the waste 91 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project gas meets fire, it will burn even explode. If liquid leaks, it will be evaporated in the cofferdam or form into liquid bath. The evaporation of the liquid will affect the air environment. The evaluated maximum credible accident is a poisoning one from liquid ammonia leakage. It is as follows: After the implement of this project, there will be a spherical press storage tank under common temperature for liquid ammonia with an area of 1000m3. The maximum filling ratio of the tank is 0.9 and the maximum storage volume is 738t. Because the storage volume is more than the threshold quantity, it is a great hazard source. The liquid ammonia storage tank is connected with the synthetic ammonia workshop, nitric acid workshop and ammonium nitrate workshop through pipes. When there is a leakage due to pumps and valves of the conveyance pipelines, relevant control valves can be swiftly closed to cut down the leakage source, thus the leaked material will be controlled. But when there is a leakage due to valves or pipes connecting with the liquid ammonia storage tank, because there is no control valve to cut down the leaked material, and manual power must be used to control the leakage, the leakage duration will be longer and leaked ammonia will be more. Moreover, the liquid ammonia is conserved by press, once there is a leakage, it will soon become ammonia gas which will volatilize to the air, and badly damage the surrounding environment. 8.2.2 Determination of accident occurrence rate It cannot foresee the hazard source accident. Due to many accident occurrence factors and the waste discharge differences, it is difficult to quantify the occurrence rate and the danger of accidents. According to the statistics from Practical Technology and Method of Environment Risk Evaluation (Editor-in-chief: Hu Erbang), at present, the domestic risk rate of typical petrochemical equipment accident is about 1×10-5 times per year. Compared to the operation condition of the domestic equipments in the same field, the reason and rate of the accident should be the similar. Therefore the occurrence rate of the maximum credible accident is evaluated 1×10-5 times per year. 8.2.3 Leakage Time Determination of Liquid Ammonia Storage Tank The emergency response time of the accident considers the following factors: (1) Emergency Response Time of Domestic Petrochemical Enterprise Investigation finds that at present the emergency response time of domestic 92 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project petrochemical enterprise is between 10~30min. At most 30 minutes are needed to take measures, including cutting the material pipeline connecting the accident source, and transferring accident source material through pumps and so on. (2) Emergency Response Time Recommended by Guide Referring to Practical Technology and Method of Environment Risk Evaluation (Editor-in-chief: Hu Erbang), which was recommended by Technical Guide for Evaluation of Construction Project Environment Risk HJ/T 169-2004, the response time of the accidents in the book is also within 30min. (3) Emergency Response Time of Foreign Petrochemical Enterprise According to the regulations on material leakage time of the risk accidents happened in petrochemical enterprises, U.S. Environmental Protection Agency holds the viewpoint that the leakage time should be generally controlled within 10min. The material volume in the storage tank should be controlled within 10% of the total when there is an accident esp. an explosion accident. There is distance between the occurrence time and the foreseeing time. Although we have more advanced equipment and controlling technology than that of common domestic chemical enterprises, margins should be considered. The determined emergency response time of this project is 20min. 8.2.4 Leakage rate determination of liquid ammonia storage tank The pressure of the liquid ammonia tank is generally 1.2MPa and the storage temperature is less than 303K. Upon leakage, the crack caliber is 20% of the pipe caliber, i.e. 3cm and the crack area is 0.000707m2. The leakage rate of the liquid ammonia storage tank is calculated according to the following formula: 2( p − P0 ) Leakage rate Q = C d Aρ ρ In the formula: Q——liquid leakage speed, kg/s; Cd——liquid leakage coefficient, 0.6 is chosen; A——crack surface, m2; ρ——leaked liquid density, kg/m3; ρAmmonioa=1470kg/m3, ρAmmonia=1070kg/m3; P——pressure of medium inner tank, Pa; P0——pressure of environment, Pa; 93 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Table 8-1 shows the calculation result of the leakage rate of liquid ammonia storage tank. Tab. 8–1 Calculation of Leakage Rate of Liquid Ammonia Storage Tank Internal Env. Crack Liquid Leakage Leakage Leakage Leakage Temp. Leakage pressure Pressure surface density Shape speed duration rate source (K) coef. (Pa) (Pa) (m2) (kg/m3) (kg/s) (min) (t) Liquid ammoni 303 1200000 101325 0.000707 820 Round 0.62 18.6 20 22.3 a tank The above calculation indicates that when a leakage occurs, the leakage speed is 18.6kg/s, leakage duration is 20min and the total leakage rate is 22.3t. Because the liquid ammonia is stored by pressure and it is a super-heated liquid, the leaked ammonia will immediately volatilize and the volatilization rate is calculated according to the following formula: Q1=F·WT/t1 In the formula: Q1——flash steam volume, kg/s; WT——total liquid leakage volume, kg; t1——flash steam time, s; F——proportion of steamed liquid among the total liquid; it is calculated according to the following formula TL − Tb F = Cp H In the formula: Cp——constant-pressure specific heat of liquid, J/(kg·K); TL——liquid temperature before leakage, K; Tb——boiling point of liquid under regular pressure, K; H ——liquid gasification heat, J/kg。 Generally speaking, FV in the above formula is between 0 ～ 1. Under this circumstance, part of the liquid will stay in the steam cloud as mini scattered drops. With the mixture of air, part of the drops will be evaporated. If the heat from the air is not high enough to evaporate all the drops, part of the liquid will fall to the ground to form liquid bath. As for whether the liquid is taken away or not, there is no acceptable model at present. Relevant experiment indicates that if FV ＞0.2, liquid bath will not be formed 94 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project possibly, and if FV＜0.2, it can be supposed that there is a linear relation between the liquid and FV. If FV=0, no liquid will be steamed; if FV=0.1, 50% of the liquid will be steamed. Therefore, with consideration of the drop volume, the liquid volume steamed by flash steam is calculated according to the following formula: A、 When Fvap≤0.2 D=5×Fvap×QL Liquid volume in the ground liquid bath: Ds＝(1-5×Fvap) ×QL B、 When Fvap≥0.2 All the liquid will be steamed and there will be no liquid bath. The boiling point of liquid ammonia under normal pressure is -33.5℃, the liquid constant-pressure specific heat is 4600J/(kg·K) , and the gasification heat is 1371168.5J/kg. Through calculation, if the above leakages occur, all the liquid ammonia will volatilize. The enterprises adopt such emergency measures as leakage alarm and spray absorb to liquid ammonia storage tank. In this way, 50% of the ammonia gas will be absorbed by water, and other 50% will be evaporated into the air. Therefore in a liquid ammonia leakage, the evaporation rate is 9.3kg/s and the time is 20min. 8.3 Result Prediction and Analysis of Liquid Ammonia Leakage 8.3.1 Prediction Model Multi-puff model is adopted for calculation, which is recommended by Technical Guide for Evaluation of Construction Project Environment Risk (HJ/T 169-2004). 2Q ⎡ ( x − x o )2 ⎤ ⎡ ( y − y o )2 ⎤ ⎡ zo ⎤ 2 C ( x, y , o ) = exp⎢− ⎥ exp ⎢− ⎥ exp ⎢− (2π )3 / 2 σ xσ yσ z ⎢ 2σ x2 ⎥ ⎢ 2σ y2 ⎥ ⎣ 2σ z2 ⎥ ⎣ ⎦ ⎣ ⎦ ⎦ In the formula: C ( x. y.o ) ----leeward ground ( x, y ) coordinate pollutant concentration in the air (mg.m-3) ; xo , y o , zo ----puff center coordinate; Q—puff discharge volume in accident; 、 σ σX、 σy、 z——dispersion parameter(m) in the direction of X, Y, Z, commonly σX 95 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project =σy As for instant or short time accident, the following multi-puff model used for changeable weather can be adopted: 2Q′ H e2 ⎧ ( x − xw ) 2 ( y − yw ) 2 ⎫ ⎪ i i ⎪ Cw ( x, y, o, tw ) = i exp(− ) exp ⎨− − ⎬ ( 2π ) σ x,eff σ y ,eff σ z ,eff 2σ x ,eff ⎪ 2σ x ,eff 2σ y ,eff ⎭ 3/ 2 2 2 2 ⎩ ⎪ In the formula: Cw ( x, y , o, t w ) -- surface concentration produced by puff i at t w (i.e. w time i period) at point(x, y, 0) ; Q ′ --puff discharge volume(mg) , Q ′ = QΔt ; Q is discharge ratio(mg.s-1) , Δ t is time period(s) ; σ x,eff 、 y,eff 、 z,eff --equivalent dispersion parameter (m) of puff at w time period σ σ in the direction of x, y and z, it can be calculated by the following formula: w σ 2,eff = ∑ σ 2,k j j ( j = x, y , z ) k =1 In the formula: σ 2,k = σ 2, k (tk ) − σ 2,k (tk −1 ) j j j i i x w and y w --end of w time period, x, y coordinate of the mass center of I puff, it can be calculated by the following two formulas: w−1 x w = u x , w (t − t w−1 ) + ∑ u x ,k (t k − t k −1 ) i k =1 w−1 y w = u y , w (t − t w−1 ) + ∑ u y ,k (t k − t k −1 ) i k =1 8.3.2 Calculation result and analysis According to the meteorological features of the project location, we choose 1～ 2m/s and 2 ～ 3m/s wind speed and B, D, E stability to prediction the surface concentration upon liquid ammonia. Table 8-2 shows us the danger corresponding to different ammonia concentration. As for the surface concentration prediction result of leeward liquid ammonia in a leakage accident, please refer to Table 8-3 and 8-4. 96 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 8–2 Danger Corresponding to Different Ammonia Concentration Workshop sanitary Type LC50 Lethal concentration standard Ammonia 30mg/m3 1390mg/m3 ＞3500mg/m3 Table 8-5 and Table 8-6 show liquid ammonia leakage accident’s impact to ambient environmental sensitive points under the conditions of different times and different weather. 97 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 8-3 Prediction of Pollutant Concentrations at Different Leeward Distances under 1-2m/s Wind Speed Condition when Liquid Ammonia Leakage Accident Happens (mg/m3) Leeward 10min 20min 30min distance (m) B C D E B C D E B C D E 50 10263.16 7551.53 5166.58 409.49 10263.16 7551.53 5166.58 409.49 0.00 0.00 0.00 0.00 100 6031.51 9855.84 11050.92 8225.11 6031.51 9855.84 11050.92 8225.11 0.00 0.00 0.00 0.00 150 3267.88 6396.53 8375.16 10491.34 3267.88 6396.53 8375.16 10491.34 0.00 0.00 0.00 0.00 200 2007.96 4232.01 5987.86 9439.20 2007.96 4232.01 5987.86 9439.20 0.00 0.00 0.00 0.00 250 1354.04 2968.65 4404.18 7882.82 1354.04 2968.65 4404.18 7882.82 0.00 0.00 0.00 0.00 300 974.77 2190.22 3356.95 6509.09 974.77 2190.22 3356.95 6509.09 0.00 0.00 0.00 0.00 350 735.88 1681.59 2640.49 5409.29 735.88 1681.59 2640.49 5409.29 0.00 0.00 0.00 0.00 400 575.79 1332.24 2131.94 4546.48 575.79 1332.24 2131.94 4546.48 0.00 0.00 0.00 0.00 450 463.27 1082.28 1758.86 3867.85 463.27 1082.28 1758.86 3867.85 0.00 0.00 0.00 0.00 500 381.10 897.34 1477.29 3328.62 381.12 897.34 1477.29 3328.62 0.02 0.00 0.00 0.00 550 315.07 756.64 1259.57 2894.82 315.39 756.65 1259.57 2894.82 0.31 0.00 0.00 0.00 600 263.34 646.99 1087.69 2541.42 265.29 647.10 1087.71 2541.42 1.95 0.12 0.02 0.00 650 219.41 558.38 948.90 2250.02 226.20 560.11 949.60 2250.04 6.79 1.73 0.70 0.02 700 179.26 479.19 828.29 2004.81 195.13 489.84 836.90 2007.09 15.87 10.66 8.61 2.28 750 141.88 396.61 699.57 1757.21 170.03 432.25 743.68 1802.45 28.15 35.65 44.11 45.24 800 108.31 306.55 542.06 1367.12 149.46 384.45 665.66 1628.47 41.15 77.89 123.60 261.36 850 79.91 217.60 370.71 817.91 132.40 344.31 599.67 1479.30 52.49 126.71 228.96 661.39 900 57.28 141.93 222.05 353.75 118.10 310.26 543.33 1350.40 60.82 168.34 321.28 996.64 950 40.14 86.00 118.11 113.18 105.99 281.14 494.82 1238.23 65.85 195.13 376.70 1125.05 1000 27.69 49.13 57.05 28.33 95.65 256.01 452.74 1139.99 67.96 206.89 395.69 1111.66 2000 0.02 0.00 0.00 0.00 6.52 12.20 14.01 5.88 23.94 73.60 138.72 368.52 3000 0.00 0.00 0.00 0.00 0.08 0.01 0.00 0.00 2.79 5.39 6.34 2.45 4000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.11 0.02 0.00 0.00 5000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 98 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 8-4 Prediction of Pollutant Concentrations at Different Leeward Distances under 2≤u<3m/s Wind Speed Condition when Liquid Ammonia Leakage Accident Happens (mg/m3) Leeward 10min 20min 30min distance (m) B C D E B C D E B C D E 50 6237.15 5546.22 4507.79 581.47 6237.15 5546.22 4507.79 581.47 0.00 0.00 0.00 0.00 100 3618.84 5917.50 6669.58 5021.39 3618.84 5917.50 6669.58 5021.39 0.00 0.00 0.00 0.00 150 1960.72 3837.92 5025.12 6266.77 1960.72 3837.92 5025.12 6266.77 0.00 0.00 0.00 0.00 200 1204.77 2539.20 3592.72 5662.62 1204.77 2539.20 3592.72 5662.62 0.00 0.00 0.00 0.00 250 812.42 1781.19 2642.51 4729.69 812.42 1781.19 2642.51 4729.69 0.00 0.00 0.00 0.00 300 584.86 1314.13 2014.17 3905.45 584.86 1314.13 2014.17 3905.45 0.00 0.00 0.00 0.00 350 441.53 1008.95 1584.29 3245.57 441.53 1008.95 1584.29 3245.57 0.00 0.00 0.00 0.00 400 345.48 799.34 1279.16 2727.89 345.48 799.34 1279.16 2727.89 0.00 0.00 0.00 0.00 450 277.96 649.37 1055.32 2320.71 277.96 649.37 1055.32 2320.71 0.00 0.00 0.00 0.00 500 228.67 538.40 886.37 1997.17 228.67 538.40 886.37 1997.17 0.00 0.00 0.00 0.00 550 189.23 453.99 755.74 1736.89 189.23 453.99 755.74 1736.89 0.00 0.00 0.00 0.00 600 159.17 388.26 652.62 1524.85 159.17 388.26 652.62 1524.85 0.00 0.00 0.00 0.00 650 135.72 336.06 569.76 1350.02 135.72 336.06 569.76 1350.02 0.00 0.00 0.00 0.00 700 117.08 293.91 502.14 1204.25 117.08 293.91 502.14 1204.25 0.00 0.00 0.00 0.00 750 102.02 259.35 446.21 1081.47 102.02 259.35 446.21 1081.47 0.00 0.00 0.00 0.00 800 89.68 230.67 399.40 977.08 89.68 230.67 399.40 977.08 0.00 0.00 0.00 0.00 850 79.44 206.58 359.80 887.58 79.44 206.58 359.80 887.58 0.00 0.00 0.00 0.00 900 70.83 186.16 326.00 810.24 70.86 186.16 326.00 810.24 0.03 0.00 0.00 0.00 950 63.49 168.68 296.89 742.94 63.59 168.68 296.89 742.94 0.10 0.00 0.00 0.00 1000 57.08 153.59 271.64 683.99 57.39 153.61 271.64 683.99 0.31 0.02 0.00 0.00 2000 1.07 0.64 0.27 0.00 14.75 44.31 83.30 221.12 13.73 43.66 83.03 221.12 3000 0.01 0.00 0.00 0.00 3.16 9.34 16.29 26.90 6.67 21.36 42.90 122.94 4000 0.00 0.00 0.00 0.00 0.20 0.11 0.04 0.00 2.88 10.50 22.50 69.31 5000 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.58 1.17 1.42 0.50 99 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Tab. 8-5 Analysis of Concentrations under Different Weather Conditions after Liquid Ammonia Leakage Max. landing concentration Distance scope Distance scope Wind Prediction and occurrence distance of semi-lethal of allowable short-time touch speed time Stability concentration concentration [m/s] [min] [mg/m3] [m] [m] [m] B 10288.68 52 246 989 C 11037.18 76 390 1041 10 D 11209.26 90 519 1040 E 10495.79 147 798 998 B 10288.68 52 246 1576 C 11037.18 76 390 1851 1.5 20 D 11209.26 90 519 1908 E 10495.79 147 884 1896 B 68.25 1027 — 1804 C 208.53 1029 — 2550 30 D 396.98 1012 — 2714 E 1130.98 966 — 2764 2.5 B 6237.26 50 184 1266 C 6776.14 73 290 1520 10 D 6835.23 73 380 1576 E 6371.67 142 638 1576 B 6237.26 50 184 1394 C 6776.14 73 290 2434 20 D 6835.23 73 380 2822 E 6371.67 142 638 2984 30 B 15.39 1715 — — C 50.90 1710 — 2484 D 101.17 1680 — 3681 100 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project E 298.40 1604 — 4325 Tab. 8-6 Analysis of Concentrations of Environmental Sensitive Points under Different Weather Conditions after Liquid Ammonia Leakage Distance scope Distance scope Wind Prediction Max. landing concentration of semi-lethal of allowable short-time touch speed time Stability and occurrence distance concentration concentration [m/s] [min] [m] [m] 72.7917mg/m3, 22’ 53.7’‘ Qiaodan C 199.3884mg/m3, 22’ 59.0’‘ — 11’ 15.8’‘ - 34’ 42.1’‘ Residential D 357.5540mg/m3, 22’ 60.0’‘ — 11’ 12.9’‘ - 35’ 2.6’‘ Quarters E 904.6484mg/m3, 21’ 3.2’‘ — 11’ 38.8’‘ - 35’ 12.5’‘ B 43.8215mg/m3, 26’ 44.0’‘ — 18’ 11.9’‘ - 35’ 16.1’‘ Longwan C 125.3210mg/m3, 26’ 50.8’‘ — 15’ 21.9’‘ - 38’ 19.5’‘ 1.5 Village D 229.8781mg/m3, 27’ 2.2’‘ — 15’ 4.2’‘ - 38’ 60.0’‘ E 595.8464mg/m3, 27’ 13.2’‘ — 15’ 24.8’‘ - 39’ 25.8’‘ B 30.1403mg/m3, 30’ 13.9’‘ — 28’ 41.3’‘ - 31’ 46.5’‘ Qiaokou C 89.2395mg/m3, 30’ 22.1’‘ — 19’ 19.4’‘ - 41’ 24.8’‘ Town D 166.3341mg/m3, 30’ 35.9’‘ — 18’ 42.6’‘ - 42’ 29.2’‘ E 437.9277mg/m3, 31’ 3.8’‘ — 18’ 54.7’‘ - 43’ 13.1’‘ B 43.6769mg/m3, 16’ 20.0’‘ — 8’ 25.1’‘ - 26’ 59.4’‘ Qiaodan C 119.6331mg/m3, 15’ 19.9’‘ — 7’ 5.2’‘ - 28’ 25.5’‘ Residential D 214.5324mg/m3, 14’ 46.4’‘ — 6’ 56.7’‘ - 28’ 44.6’‘ Quarters E 542.7890mg/m3 , 13’ 7.3’‘ — 7’ 5.8’‘ - 28’ 57.0’‘ B 26.3214mg/m3, 20’ 0.4’‘ — — Longwan C 75.1927mg/m3, 19’ 47.8’‘ — 9’ 45.3’‘ - 30’ 23.7’‘ 2.5 Village D 137.9268mg/m3, 18’ 41.6’‘ — 9’ 22.3’‘ - 31’ 0.4’‘ E 357.5079mg/m3, 17’ 5.1’‘ — 9’ 24.6’‘ - 31’ 25.8’‘ B 18.1845mg/m3, 22’ 6.3’‘ — — Qiaokou C 53.5465mg/m3, 22’ 11.3’‘ — 12’ 24.7’‘ - 31’ 57.7’‘ Town D 99.8006mg/m3, 22’ 20.8’‘ — 11’ 40.6’‘ - 32’ 58.4’‘ E 262.7566mg/m3, 20’ 47.9’‘ — 11’ 33.6’‘ - 33’ 39.0’‘ According to the prediction result, when a leakage accident occurs, if the wind speed is 1～2m/s, the scope exceeding the semi-lethal concentration is between 246m and 884m, and the scope exceeding the allowable short time contact concentration is between 989m and 2764m; when the wind speed is 2～3m/s, the scope exceeding the semi-lethal concentration is between 184m and 638m, and the scope exceeding the allowable short time contact concentration is between 1266m and 4,325m. The places surrounding the factory location like the living area of Qiaodan Company, Longwan Village and Qiaokou Town will not encounter semi-lethal concentration. When the wind speed is 1～2m/s and in E stability, the maximum concentration in the living area of Qiaodan Company is 904.6484mg/m3 , which occurs at 21'3'', and the allowable short time contact concentration occurs between 12~36min after the leakage; the maximum concentration in Longwan Village is 595.8464mg/m3 , which occurs at 27'13'', and the 101 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project allowable short time contact concentration occurs between 15~40min after the leakage; the maximum concentration in Qiaokou Town is 437.9277mg/m3 , which occurs at 31'3'', and the allowable short time contact concentration occurs between 15~40min after the leakage. The surrounding villages are differently influenced by it. 8.4 Risk control 8.4.1 Risk prevention measure 184.108.40.206 Site selection , layout plan and prevention measures for construction safety (1) Site selection The site of this project is near Qiaokou Town and the main protective targets are the living area of Qiaodan Company, Longwan Village and Qiaokou Town. The dormitory of the company is closely adjacent to the living area and the distance between the urea production equipment and it is 200m. Once there is an accident, great influence will appear. The sanitary protective distance of this project is 400m. Chenzhou Chemical Group has promised to remove the living area of Qiaodan Company. (2) Layout plan and prevention measures for construction safety The construction will be strictly done according to the current national design regulations and standards. All the production equipments will be arranged in accordance with the fire and explosion break protection distance. The workshops and other buildings will be designed on the basis of regulated grade. Facilities with high temperature and open flame will be kept away from the place which emits flammable gas as far as possible. On the basis of the grades of fire, explosion and poison during the production process, the workshop will be reasonably divided into management area, technical production area, aid production area and storage & delivery equipment area. Corresponding safety prevention measures will be adopted to manage various areas. Organize people and goods rationally. With consideration of transportation and fire control, ring fire control passages will be set around the facility areas to meet the demand of technical process, transportation, repair and production management. 220.127.116.11 Storage safety and prevention measures of hazardous chemicals (1) The storage facility and method must meet the national standards. (2) Examine the storage facility once per year and put forward improvement scheme for the problems. If danger is found, stop using the facility which must be replaced or repaired and relevant safety measures should be taken. (3) The hazardous chemicals must be stored in special warehouse with clear marks, 102 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project which can meet the national demands of safety and fire control, and they should be managed by special person. (4) A cofferdam (1.5m high) should be constructed around the liquid ammonia storage tank to avoid gas spreading out and it is advantageous to collect it once an accident happens. The environment evaluation personnel suggest that a leakage supervision system (night camera, leakage alarm equipment) should be installed for dynamic management and such fire control facilities as fire hydrant, fire extinguisher and anti-explosion lamp should be prepared. (5) The pipelines are of high quality and corrosion allowance and the key pipelines are with higher pressure grade. Except the necessary valve and instrument etc, flange joints are seldom used for less leakage possibility. 18.104.22.168 Technical Design Safety and Prevention Measures (1) During the gasification and compound process, make sure that the safety of production equipment and the concentration of hazardous material should conform to the standards. At the same time, strictly implement safety rules and rules of examination of CO etc when examining the equipments. It is allowed to do the examination work after the approval of the safety department. (2) In the gasification and purification process, measures of safety chain and emergency break-off are taken in the technical design for safe production. (3) Inside the factory, gas prevention station and medical treatment room are set for people’s safety. (4) Thunder arresting measures are taken for high buildings, equipments and liquid ammonia storage tank areas. (5) Cofferdam and water spray measures are taken around the liquid ammonia storage tank areas for safety. (6) Protection cabinets with gas masks (for CO etc), rubber boots, rubber gloves and protective glasses are set in every workshop and position for people’s security. (7) As for pressure vessel and high pressure pipelines, during design and after its operation, they will be strictly in conformity with the regulations of pressure vessels. All the class A welding lines will be inspected with 100%X rays. (8) Enough explosion venting area, and complete thunder arresting and static free measures are set for the equipment workshops. Standard guard rails are set around the pool and the ladder. All the holes for hoist and equipment installation are sealed strictly and there is good illumination system inside and outside of the rooms. All the fire resistance rating of the 103 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project buildings is not less than Class B. The fire compartment, corrosion protection measure and escape route are implemented according to corresponding national regulations. (9) Emergency supply is prepared for sudden power off. 22.214.171.124 Safety and prevention measures of automatic control and electric instrument design (1) Choose advanced and credible production process in design, assure safety production of equipment, and well manage flammable and explosive material and ignition source to avoid fire and explosion. (2) The design of equipment and pipeline, especially the one with high temperature, pressure or low temperature can meet the current national standard and regulation. (3) Auto control inspection instrument, alarm signal and emergency pressure relief facilities are set for the equipment that may arouse fire and explosion because of super temperature and pressure from chemical reaction. Explosive board should be installed to the equipment with sudden super pressure material or instant decomposition explosive material. If a blasting cap is used, it should face the safety direction, and measures to prevent a second explosion should be taken on the basis of demand. (4) The blow-down pipe of the flammable gas should adopt electrostatic grounding and should be within the protection area of thunder arresting. Its height should be in accordance with the following demand: The blow-down pipe inner the equipment area should be 2m higher than the highest equipment with operator; the blow-down pipe closely adjacent to the building or inner the building should be 2m higher of the building. Table 8-7 shows the equipment of fire control and explosion prevention needed for the reconstruction project. Tab. 8-7 Equipment of Fire Control and Explosion Prevention Needed for Reconstruction Project Type Item Installation Position Purpose & Function Demand Sound or light alarm signal will give out when Color of the signal lamp Alarm Place with scattered there is danger from should be clear (red), Safety mark lamp signal workers among technical temperature, pressure, and the ring should be or ring etc facility equipment concentration, liquid different from the noise. level, flow speed and Both should be sensitive. proportion etc. Avoid false operation The complete Dangerous positions Safety chain Interlocking relay, and accident due to super blow-down pipe should with impact to technical facility regulator etc temperature, pressure be 2m higher of the parameter in production and speed etc. equipment. Emergency Safety valve, Departments of boiler, Once super pressure Keep it sensitive and pressure explosion piece, pressure vessels, pump occurs in production, it inspected regularly. relief explosion export etc can jump, crack or open 104 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project facility protection door, to relieve the pressure blow-down pipe and avoid explosion. etc Avoid overflow of Keep the liquid level and It is generally installed flammable gas, liquid regularly check gas Safety liquid seal between the gas pipeline and steam so as to leakage. In cold area, (safety water seal) (lower than 0.2 psig) and extinguish fire and freezing of liquid (water) production equipment. prevent its spreading. seal should be prevented. Metal wire net, Back-fire It is generally installed corrugated net and Fire arrestor should be equipment between the pipeline of pebbles are installed in designed according to flammable & explosive the fire arrestor. When regulations on Fire arrestor gas, liquid & steam and the fire passes the small dimension, size of hole, vessels or on the vent hole, due to sudden and concentration so as pipe. increased heat waste, it to put out the fire. will extinguish soon. 126.96.36.199 Main emergency measures As for the possible accidents in the production, effective reaction measures should be taken in the design. Now here is the brief introduction of the main and concrete measures: (1) Emergency measures for fire and explosion People who discover a fire should immediately report to the department leader and the coordination center; he or she should clearly report the fire position, object, fire behavior and the surrounding situation, and the man on duty should organize people to put out the fire with fire extinguisher, hydrant and water pipes; try to transfer or isolate the surrounding flammable and explosive materials; according to the fire behavior, he or she should determine whether disperse the man on site to the safety area or not; after receiving the report the man on duty in the coordination center should report to the emergency command center of the company and dial “119”; organize fire control group to help put out the fire; the command group should wear gas mask to save the people in trouble and disperse onlookers on site and draw warning line; people of medical group should treat and save the injured immediately; people of the contact group is responsible for contact of the emergency command group; the mobile group should gather together for order; the logistics group should make sure all the materials needed for emergency are timely transported, and should help the command group with other tasks; they are also in charge of receiving the fire fighters at the entrance of company; the fire fighters are responsible for putting out the fire and the command group should coordinate to do other tasks well. (2) Emergency measures for hazardous chemicals poison After receiving the news the emergency rescue center should organize the rescue issues 105 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project at once. On-site rescue: wear oxygen breathing apparatus (OBA) to enter site, disperse people to escape from the dangerous area, and rescue the poisoned people on site as soon as possible; try to close the poison source and prevent it from continuous leakage; open doors and windows to enhance air ventilation, or use ventilator to emit the toxic gas, or use water spray mist to absorb the toxic gas. On-site first aid: move the poisoned people to a place with fresh air, and unfasten the tight clothes; immediately conduct oxygen therapy to the people if he has difficulty in breath; if there is no breath, give him life kiss; when the heart is suddenly stopped, give him closed cardiac massage. Skin contact: take off the polluted clothes and wash the skin at least 30min with clean water at once, then go to see a doctor; Eye contact: open the eyelid and wash the eyes with running water or saline water, then go to see a doctor; Stomach contact: have milk, egg white and so on. Try to vomit then go to see a doctor. (3) Emergency measures for hazardous chemicals leakage If hazardous chemicals for example a toxic and hazardous medium leakage happen, people should settle it according to position operation rule and emergency treatment rule. At first report to production coordination center about the place, feature of the leaked medium, and whether there is injury or not. After hearing the news, the center should make correct analysis and judgment, adopt relevant treatment scheme to control its spreading, and inform the volunteer fire brigade and the people in charge of environment in the mobile section for rescue according to the feature of the accident. The volunteer fire brigade, after receiving the news, should swiftly start the rescue work on site including dispersing people to a safe area, forbidding irrelevant people to the polluted area, cutting off the fire source, and wearing auto oxygen and air respirator and protection suit to make sure security and stop leakage. It is forbidden to take action solely and a guardian is needed and a water piston can be adopted if necessary. Collect it by fire control pool, then transfer, recycle or discharge after innocent treatment. After receiving the news, the people in charge of the environment from the mobile section should immediately go to the site or suspicious area to inspect the toxic and hazardous material, and put forward scheme and measures of dispersing people, controlling and getting rid of pollution. After receiving the news, the comprehensive department should notify the guardian group to set warning line quickly, forbid irrelevant staff to enter the site, and organize people in the leeward direction to move to a safety area from the place that may be polluted. When the leaked media are likely to have bad impact on social environment, the general manager office should report to the local government for support and coordination. After receiving the news, the mobile section should swiftly organize to rescue people and 106 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project repair equipment to control the leakage volume. Protect the site after the accident. Comprehensive department is responsible for organizing relevant staff to investigate the cause of the accident, filling out Report on Emergency Treatment, and reporting it to production coordination center, and deputy production manager. If necessary, the general manager and relevant superior department should be notified. 8.4.2 Accident emergency environmental monitoring scheme (1) Monitoring item Environmental air monitoring: NH3, CO (2) Monitoring frequency Monitor after the accident as soon as possible. Monitor the air every 15 minutes in the first hour after the accident; Monitor every 4, 8 and 24 hours after the accident. (3) Monitoring position According to different leakage situation, arrange monitoring positions at places those are respectively 0m, 100m, 200m and 400m far away from the accident spot at the leeward direction, and respectively set one monitoring spot in the living area of Qiandan Company, Longwan Village and Qiaokou Town. (4) Monitoring way Emergency monitoring method for ammonia: portable gas detector: ammonia sensing electrode; commonly used methods of fast chemical analysis: bromophenol blue detector tube, Thymol blue detector tube; speed detector tube for gas. Emergency monitoring method for CO: portable gas detector: solid thermal conductivity detector (TCD), potentiostatic electrolysis, CO microcoulometric detector (MCD), infrared CO detector; commonly used methods of fast chemical analysis: iodine pentoxide long detector tube, palladium sulfate-ammonium molybdate color detector tube; speed detector tube for gas. (5) Monitoring instruments Table 8-8 shows the instruments for emergency monitoring. Tab. 8-8 Instrument for Emergency Monitoring No. Item Quantity (set) 1 Portable gas detector 5 2 Speed detector tube for gas 2 107 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 8.4.3 Emergency preplan frame Prevention is the basic measure for avoiding an accident. But there should be emergency measures too. Once there is an accident, actions taken have respect to the widespread scope and losses. Toward the completion of this project, a complete emergency rescue network should be built. This evaluation demands a joint accident emergency network formed by the company, the project and the surrounding environment that may be impacted by the accidents. The tools for accidents and first aid scheme should be considered at the same time. The surrounding residents should together take part into various rehearsals. The report lists the preplan frame for the reference of company. (1) Preparation before making preplans Determine the danger source and the potential hazard. This includes the condition, quantity, danger features and technical process of the dangerous materials, and the possible method, feature, impact scope, occurrence frequency and the dangerous grade of the accidents. Besides the danger source should also be determined. The main dangerous source of this project is scattered in the equipment area and the liquid ammonia storage area. The possible accidents led by the main danger source are explosion, fire and liquid ammonia leakage, and the results are the danger of people contact, fire and explosion. (2) Main contents of preplan ① Emergency planning area Give an introduction of the layout of the workshop, and make a primary analysis of production, usage, storage, transportation, quantity of dangerous chemicals, feature of danger etc. Make detailed illustration of the quantity and layout of the dangerous chemicals, and determine the emergency planning area and its layout. ② Commanding mechanism and personnel It includes the name list, responsibility and temporary people for replacement, different commanding point for different accident, and a regular table of people on duty. People in charge of commanding should include the officers from Qian’an Fertilizer Co., Ltd. ③ Different preplan response condition According to the features of the project, regulate the grades of preplan and the different preplan response procedure. ④ Emergency rescue safeguard 108 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Regulate the equipments for emergency use and people in charge of them. ⑤ Alarm and contact method It includes the alarm number, communication, contact and long distance signal contact, and the alarm and contact in such special situation as power off, thunderstorm. ⑥ Emergency measure It includes two aspects. First, it refers to emergency environment inspection, rescue, and control measures. Professional group is responsible for the inspection of the accident spot, for the evaluation of accident feature, parameter and result, and for providing determination basis for the commanding department; second, it refers to the emergency inspection, protection measure, leakage clearing measure and equipment. It includes the site of accident, surrounding areas and controlling of the fire prevention area. The measures of pollution control and clearance and relevant equipments should be clear. Work out different rescue scheme and procedure (for example emergency plan and procedure for fire and explosion, water and power cut off), draw clear illustration, make clear the methods of rescue, regulate the nursing demands when transporting an injured one, work out a regular table, detailed address and contact of the doctor on duty, determine the site emergency point and set clear marks. ⑦ Evacuation plan It includes the emergency dispersion of people, and its organization. Make sure the site of the accident, surrounding area of the factory, areas that are likely to be affected, and formulate medical rescue procedure. Work out in a detailed way about the emergency collection position of this factory, and the position for the surrounding residents, and determine the escape route for an accident. ⑧ Close procedure of accident emergency rescue and measure of recovery Regulate the emergency termination procedure, treatment and recovery measures for the site after the accident, and treatment and recovery measures for the surrounding areas after the accident. ⑨ Emergency training plan After formulating the emergency training plan, arrange training and rehearsal regularly and if necessary, the surrounding residents should be trained too. 109 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project ⑩ Public education and information Start public education, training and issue relevant information in the surrounding areas of the factory. 8.4.4 Summary and rectifying measures According to the analysis of the material hazard and serious danger source, among the flammable, explosive and toxic semi-finished products used in the production of this project, semi-water gas and ammonia are the main hazardous pollutants. On the basis of risk evaluation of the maximum credible accidents, liquid ammonia leakage may lead to human death, and serious influence to the human who live in the 600m leeward direction. The risk is within the acceptable scope. This evaluation formulates emergency measures and preplan frame of the risk accidents. On the basis of the statistics of local storm intensity and the relevant prescriptions of Regulations on Design and Fire Control of Petrochemical Enterprises, it should set up collection pool of fire control waste water and rains in the primary period, and pave relevant pipelines for collecting waste water from fire control and the rains in the first 10min of the factory. 110 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 9 Public Participation 9.1 Purpose of Public Participation According to the requirements of Environmental Impact Assessment Interim Measures for Public Participation, this assessment report deals in public opinion survey of the public (individual and group) in the scope of and around the proposed construction site of Chenzhou Qiaodan Chemical Industry Co., Ltd.. As we all know, any development construction will have either positive or negative impact on the natural environment and social environment nearby, thus directly or indirectly influence the interests and benefits of the public. The introduction of public participation and survey into the process of construction project environmental impact assessment is a means of mutual communication between EIA and the public. It enables the public in the project environmental impact area to understand the information of environmental problem promptly; understand the project fully; have opportunities to express their own views through normal channels; participate in the comprehensive decision-making of development directly; propose some good ideas so as to reduce environmental pollution and loss of environmental resources. All these are very necessary in the decision-making and implementation of the construction project. Through public participation and survey in the process of project environmental impact assessment, we can collect information of people’s understandings, attitudes and requirements of the project in relevant regions. Therefore, we are able to take public’s opinions into account fully and comprehensively in environmental impact assessment and take in useful suggestions to make the project planning and designs better and more reasonable, and the regulated environmental protection measures more suitable to the demands of environmental protection and coordinated economic development. We can also improve the environmental and social benefits of the project, so as to achieve the aim of sustainable development. 9.1.1 An Overview to Public Participation The public participation survey of this environmental impact assessment takes the form of family by family interview, enquiring the public’s views and suggestions to the proposed construction project. The interviewer will distribute printed questionnaires to the interviewee and when he or she fills in completely on site, the interviewer takes it back. The statistics and 111 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project analysis shall be based on complete questionnaires. In the process of the survey, to make the public have a good understanding about the construction site conditions of Chenzhou Qiaodan Chemical Industry Co., Ltd. and make fair and reasonable decision, the interviewer shall answer questions proposed by the interviewees about the project and give explanations as fully as possible. 9.1.2 Means and Contents of Survey Means of public participation survey mainly takes the forms of project public scrutiny in the involved regions and distributing questionnaires to the public. a) Project Public Scrutiny In the process of the assessment, the following bulletin was put up on the walls of Qiaodan factory community and remained for seven days. During the intervening time, many workers get to know the conditions of the project construction. The bulletin was as follows: 112 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Chenzhou Qiaodan Chemical Industry Co., Ltd. 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization 40×104t/a Soda Ash Carbone Dioxide Multipurpose Utilization Emission Reduction Project Environmental Impact Assessment Work Bulletin According to the gist of Environmental Impact Assessment Interim Measures for Public Participation (UNCED  No.28) issued by State Environmental Protection Agency in February 2006, the public participation of environmental impact assessment for the 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 400000 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project is underway. Details are as follows: First, an Overview to Construction Project: 1. Project Name: Chenzhou Qiaodan Chemical Industry Co., Ltd. 75t/h Gas-making 3-Waste Fluidized Mix-combustion Furnace Residual Heat Utilization and; 400000 t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project 2. Basic Introduction to the Project: Chenzhou Qiaodan Chemical Industry Co., Ltd. proposed to utilize self-produced Ammonia and local salt resources to construct a production line with annual production capacity of 400000 tons soda ash within current production site and at the same time utilize residual heat from synthesis ammonia gas-making process. Construction includes the main factory production line, necessary auxiliary production project and facilities etc. Second, Work Procedure for the Project Environmental impact Assessment 1. According to preliminary feasibility study report of the project, the document type of the environmental impact assessment is decided based on “Construction Project Environmental Protection Classification Management Directory”. 2. Preliminary environmental status investigation and project analysis shall be carried out according to state relevant environmental protection laws, regulations, standard documents and engineering and technical data. In doing such, to identify factors that influence project environment; screen assessment elements; determine assessment key points and work out our assessment plans. 113 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 3. Environmental investigation to possible influenced regions, including social and economic situation investigation such as, administrative divisions, development plans, economic conditions, transportation etc.; natural environment investigation such as, terrain, geology, hydrology, weather etc.; special protection areas investigation such as, nature reserves, drinking water sources reserve, places of interest, historic landmarks and sites reserve etc; regional main pollution sources investigation, quality investigation and monitoring for ambient air, surface water, groundwater , sound and ecological environment. 4. Project analysis: By means of technological process analysis, material balance and analog analysis etc, the emission methods and quantity of the pollutant that is produced and discharged can be analyzed. According to project construction design proposal, ecological environment changes and water loss and soil erosion due to the project can also be analyzed. 5. Prediction and Assessment of environmental impact; According to the results of project analysis, based on relevant model calculation methods recommended by ETA Guidance or similar project analysis, the environmental impact due to the project can be predicted. 6. Policy analysis and suggestion to pollution prevention: According to the principles of prevention first, clean production, standardized emissions and quantity control, we may analyze the feasibility and reliability of the proposed measures and solutions for pollution prevention and ecological protection, so as to propose suggestions for improvement and adjustment. 7. Analyze whether the project meets the requirements of national industrial policy, development planning, environmental protection laws and standards. 8. Make environment feasibility conclusion based on the work mentioned above. 9. Public participation survey: Compile a handbook for environmental impact report for the convenience of the public and collect public opinions as well. 10. Finalize the environmental impact report and submit for approval. Third, Approval Procedures for Environmental impact Report 1. Application and Application Acceptance: The construction company shall submit the application and relevant material according to regulatory format to Hunan Environmental Protection Agency. Hunan Environmental Protection Agency accepts and verifies them, and makes the decision of hearing the case or not. 2. Project Review: Environmental Protection Bureau of Hunan Province reviews the report. 114 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project The environmental impact report will be assessed technically by experts organized by Hunan Assessment Center and assessment report will be submitted. 3. Project approval: Based on the conclusion of the environmental impact assessment, Environmental Protection Bureau of Hunan Province makes the approval proposal, then the proposal shall under review of the bureau directors’ special issue meeting and the bureau meeting. After their acceptance, the approval document will be issued. 4. Hearing and information publicizing: Environmental Protection Bureau of Hunan Province will publicize the received construction project information and the proposed approval for the construction project before deciding the approval. When the approval is made, the result shall be publicized as well. Fourth, Considerations for the Public Opinions Collection Requirements: After having some understandings about the project, the public shall fully realize the right of participating in the environmental impact assessment. With objective, honest, and responsible attitude, the public fills out questionnaires or proposes comments, suggestions and requirements to the construction company. Advice Duration: the first draft of the project environmental impact report is predicted to finish in early September, 2008, therefore, the advice duration is from the date of publishing the bulletin to the date of submitting the report for review. Fifth, Public Participation Methods 1. Fill out questionnaires; 2. Participate in interviews or mini-seminars; 3. Submit written comments and suggestions in letter, fax or email to Chenzhou Qiaodan Chemical Industry Co., Ltd. or Hunan International Engineering Consultating Center Sixth, Contact Methods 1. Project Owner: Chenzhou Qiaodan Chemical Industry Co., Ltd. Contact Number: Postal Code: Address: E-MAIL: mailto:firstname.lastname@example.org Fax: Contact Person: 2. Assessment Agency: Hunan International Engineering Consultating Center Contact Number: 07314517845 Postal Code: Address: E-MAIL: email@example.com Fax: 07314148163 Contact Person: Zhao Weihua 115 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Some Pictures of Bulletin Site 116 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project b) Public Survey The environmental impact assessment team of the project conducted random interviews and questionnaires to residents and relevant entities within the impact zone. The individual participant reached 30, including residents inside and around the factory zone and other residents. The questionnaire is as follows. Public Participation Qustionnaire on 75t/h Gas-making 3-Waste Fluidized Mix-combustion Furnace Residual Heat Utilization 40×104t/a Soda Ash Carbone Dioxide Multipurpose Utilization Emission Reduction Project Name Address Sex Age Occupation Contact No. Project Overview The 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project of Chenzhou Qiaodan Chemical Industry Co., Ltd is a technical transformation project of the old factory. While the old system continues operation, the new system is being built. The project construction uses the time for medium repair and heavy repair and shall not impact the production of the old system。The project content covers 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization Project and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project, with a total investment of RMB 395.184 million. The 40×104t/a soda ash project contains such facilities as heavy soda, calcinations, ammonium chloride, dry ammonium, CO2 compression, refrigeration, warehouse of finished products and so on. It makes use of the existing living area of Qiaodan Company after resettlement and is located in the right south part of the factory. The 75t/h gas-making 3-waste fluidized mixed-combustion furnace is located near the original synthetic ammonia gas-making device. The circulation water device shall be extended at the south corner of the factory. Located in the original factory, the project is unnecessary to requisition land outside the factory and resettle neighboring residents. The technical transformation project is also an environmental protection project. The gas-making 3-waste fluidized mixed-combustion furnace not only utilizes residual heat, but also settle the problems in treating waste gas, waste residue and waste ash produced in the gas-making production. The carbon dioxide multipurpose utilization project not only makes full use of surplus CO2 to produce soda ash and ammonium chloride, but also greatly increases raw material utilization rate by adopting advanced Hou’s process. According to your understanding about the project and the degree of impact it exerts on you, please tick the following options or make your suggestions. Have you ever heard related □ Yes, but only a □ Yes □ No development plans about the project? little □ economic What is your impact type of the project? □ work position □ no impact □ other income Currently, what do you think is the major □ ecology □ water □ air negative impact on the environment □ noise pollution damage pollution pollution within and around the project zone? What kind of environmental impact do □ ecology □ water □ air □ noise pollution you think will the project brings? damage pollution pollution What do you think of the construction reasonable unreasonable site for the project? Do you agree with the construction of the agree disagree project? 117 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Other advices and suggestions 1, Please use “√” to answer the questions written above. Note 2, The questions do not entail any advice or suggestion, if you have any advice or suggestion, please write in the column of “Other advice and suggestion” Interviewer: Date: 9.2 Summary and Analysis of Survey Result 9.2.1 Result Summary of Public Participation Questionnaire The interviewer distributed 60 questionnaires and collected 60 effective responses (typical public survey advice is on attachment 5). The interviewees are residents and government entities and impacted residents within the project zone. The assessment summarized the answered questionnaires and the result is on the following table 9–1. Table 9–3 Public Questionnaire Result Summary Have you ever heard Yes Yes but only a little related development plans No about the project? 91% 9% 0 economic income work position no impact other What is your impact type somebody did of the project? 50% 0 32% 13% not answer this question Currently, what do you noise pollution ecology damage water pollution air pollution think is the major negative impact on the environment Somebody within and around the 41% 0 27% 41% chose two or project zone? three options What kind of noise pollution ecology damage water pollution air pollution environmental impact do you think will the project Somebody brings? 36% 0 36% 35% chose two or three options What do you think of the reasonable unreasonable construction site of the project? 100% 0 Do you agree with the agree disagree construction of the project? 100% 0 Based on Table 9–1 above, the analysis of some major interviewed questions is as fllows: a) The fact that 91% of the public understands the development situation of the project and 118 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project the other 9% of the interviewee heard about the project demonstrates that the public pays high attention to the project. b) Another fact that 50% of the interviewee thinks that the project will have impact on their economic income, while the other 50% chose “no impact and other” shows that what concerns the public most is the economic issue. c) As to the question the current major negative impact on the environment within and around the project zone, air pollution covers 41%, noise pollution covers another 41% and water pollution takes 27%. What the public concerns most is the improvement to the environment when the project is carried out. The public generally think that the development in economy can not at the expense of hurting the environment. At the same time, the public has high expectations on this project, hoping that the construction of the project can help improve the remaining environmental problems of Chenzhou Qiaodan Chemical Industry Co., Ltd.. d) 100% of the public believes the project construction site is reasonable. e) The fact that 100% of the public agrees the construction of the project signifies that the interviewees approve the social and economic benefits of the project. 9.2.2 Questionnaire Willingness Analysis The survey also collected the public’s advice, requirements and suggestions. According to the survey, the willingness of the public from the assessment zone can be classified into the following points: a) This project is of energy-saving and emission-reduction thus confirms national policy; b) They hope the project can start construct and put into practice as soon as possible, as so to bring profits for the enterprise and increase worker’s salary and improve environment. c) The project should start as soon as possible because it can not only offer economic benefits but also improve the environment. 9.3 Summary The result of public participation survey indicates: the public of the assessment zone not only has a good understanding about the project, but also supports it very much. The public has environmental protection awareness. For one thing, they are concerned about the economic benefits of the project, for another, they are also very clear about the importance of protecting the environment, hoping that Chenzhou Qiaodan Chemical Industry Co., Ltd. can not only 119 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project restructure well but also protect the environment well. The result of public participation basically reflects the wishes of the public (or people) from the assessment zone and confirms with objective reality. The public (or people) agrees with the restructuring of Chenzhou Qiaodan Chemical Industry Co., Ltd.. For this reason, relevant construction department of Chenzhou Qiaodan Chemical Industry Co., Ltd. pays high attention to the result. They respect the wishes of the public (or people) and try their best to meet the public(or people)’s reasonable demands, and try to do a good job in environmental protection at all stages of construction and minimize the negative impacts of the project on public interests. 120 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 10 Feasibility Analysis of Project Construction 10.1 Industrial Policy Analysis National Development and Reform Commission published “Catalogue of Guidance on Industrial Structure Adjustment” in December, 2005, under the category of Restrictive, the fourth category chemical project, the seventeenth item is device of soda ash production by Hou’s process with annual production capacity less than 300,000 tons per year, but this project is 400,000tons per year. Therefore the project does not violate national industrial policy. 10.2 Analysis for Total Quantity Control of Pollutants Total quantity control divides into report, balance, plan to issue, implement year by year, annual assessment etc. Industrial pollutant emissions are under dual restrictions of weight index and emission concentration of the pollutant. This assessment is based on emission total quantity control index only, when the project is in fully use and the waste water and gases are discharged according to standards. It can be used as a reference when the enterprise files an application and environmental protection administration departments assign quotas. According to relevant requirements of national policy “One Control and Dual Standards” and related provisions on total quantity control, and also based on local environment quality control condition and overall environment capacity and project construction and production reality, the total quantity control factor of the project is determined as : Control factor of pollutant total quantity: SO2 10.2.1 Total Quantity Control Index Under normal situation, the project has no waste water emission. Total quantity index of the factory after technical transformation is on the following table 10–1. Table 10–4 Total Quantity Control Index total quantity control factor SO2 current project emission quantity 362 additional amount for project under construction 266 emission reduction of this project -164 total quantity of pollutant emission of the factory after 464 technical transformation（t/a） Current total quantity index （t/a） 470 121 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project As the table indicates, pollutant emission of the factory after technical transformation meets the demand of total quantity index. 10.2.2 Analysis of Total Quantity Control Measures a) The project shall fully implement all pollution treatment measures provided in environmental impact assessment report, ensure the emission of pollutants confirm with standards, strengthen environmental management, guarantee normal function of environmental protection facilities. b) The waste water from the technology-improved project can be treated and recycled withour emission. Waste gases from 3-wastes mixed-combustion furnace shall be discharged according to standards after cleaned by bag-type dust remover. c) Waste solid of the project includes waste slag from gas-making 3-wastes fluidized mixed-combustion furnace. After comprehensive recovery of residual carbon, the waste solid shall be transported in airtight automobile and used as construction raw material with no need to discharge. The salt clay produced in the process of Soda production can be transported to local cement and recycled. After comprehensive utilization of solid waste using above-mentioned policies, the solid wastes of the project can be treated and have no emissions. Therefore, project solid wastes can meet the requirements of local total quantity control. 10.3 Feasibility Analysis of Construction Site Selection 10.3.1 Supply Means of Raw Material and Energy The additional raw and supporting materrial is relatively little, under the premise of fixed annual production capacity, both the needed raw coal and bunker coal after the technical transformation are decreased. Particularly, as to the feature of comsuming large amount of water annually in the project, the newly use of upper tripple water closed recycling project can greatly reduce the use of fresh water and also guanrantee water supply. 10.3.2 Environmental Function Classification The sewage body of this project is Dongjiang River, and the assessed river reaches of sewage body is classified as III. The air condition of the proposed factory site region is classified as Two, and sound ernvironment Two. After the implementation of the project, the regional environmental function classification can remain same level. To sum up, the assessment believes that the project construction is feasible under the premise 122 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project of strict pollution prevention and control measures and guarantee of pollutant emission confirming standards. 10.3.3 The Reasonableness of the Plane Layout Plane layout requirement: under the premise of confirming the overall layout and workflow of main production rooms, the layout shall be as reasonable and clear as possible in function classification. The planned construction of 3-wastes mixed-combustion furnace is near the current 75t/h circulating fluidized-bed furnace taking the place of the second 75t/h circulating fluidized-bed furnace planned to construct. The layout is in the central of production section of Qiaodan Company. The proposed soda ash production project is located in the south of current production section. From north to south, there lies soda ash warehouse, calcination factory building, heavy soda warehouse, carbonization and ammonium chloride joint factory building, salt warehouse etc. The layout of main plant is basically from south to north. The layout makes transport routes reasonable, which separates workers and products and guarantees the safety and security of production. From the aspects of sensitive spots around the factory, there is no environment sensitive targets within 200m around the factory site. The nearby residents are also far way from the factory. The environmental impact assessment believe the layout is reasonable. 123 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 11 Environment Management and Monitoring Plan 11.1 Environment Management 11.1.1 Environment Management Organizations and Obligations To strengthen environment management, the project proposes establishing environment management organizations, stipulating one factory executive to take the sole responsibilities of the environmental protection work. Under the factory executive the department of security and environmental protection is set up with environmental protection professionals. Its specific job is taking care of environment management in production construction; monitoring and examining the execution of environmental protection laws and regulations; coordinating with relevant departments to solve environmental problems in production construction. In every workshop, special management organ is also set up for environmental protection as well. One part-time worker was assigned to take care of production device. The current corporation environment management organization is responsible for the environment management of this project. The network of company environmental protection organization is as follows: Factory Executive Department of security and environmental protection Environmental protection office Emission management and monitoring delegation Local environmental protection Part-time clerk for environmental agency and monitoring station protection in every workshop Fig. 11-1 Network of company environmental protection organization 11.1.2 Environment Management Requirements and Suggestions The corporation shall regulate a series of advanced systems like, environment management 124 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project system, environmental protection on-site management system, environment monitoring system, environmental protection facility management system, obligations, rewards and punishment system. From the aspect of environmental protection, the environmental impact assessment proposes the following suggestions to environment management of the project: a) Establish and implement environment management systems that confirming sustainable development; gradually introduce ISO14000 management system and meet the requirements of international markets on environmental protection; make clean production a part of production standardized management ; install water metering facilities; constantly improve detailed measures on water and energy saving and material consumption reducing.; try the best to reduce waste water emission; establish a sound environment management and industrial pollution sources file so that the enterprise can use it as a basis in decision-making. b) Control and prevent pollution: Strengthen the management and maintenance of production device; prevent the waste of resources by leakage etc. and incidents of malfunction; maintain the normal operation of environmental protection facilities to ensure emission according to standards. c) According to the construction progress of the project, the local environmental protection agency shall get to know promptly the implementation of three wastes treatment facilities and report to supervising organizations and at the same time send feedback to construction company. d) The construction company shall establish an emergency team, working out emergency solutions and supplementary facilities and equipments. The local environmental protection agency shall examine the emergency system regularly. 11.2 Environment Monitoring 11.2.1 Monitoring Plan In order to effectively understand and control the emission of three wastes, monitoring statistics should be carried out regularly on sources of waste water, waste gas, waste solid, and noise. As to water pollution source, the flow rate and concentration at the emission exit of every workshop should also be monitored. Monitoring and record should be executed on flue gas emission quantity and concentration of the boiler which is the source of waste gas. The quantity of solid wastes and noise intensity should also be monitored and recorded. 125 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Environment monitoring plan is as Table 11–1 states. When accidents and malfunctions happen, monitor frequency should be increased. Table 11–1 Environment Monitoring Plan Type Monitoring point location Items Frequency Flow rate, pH, CODcr, Waste water Emission exit at the workshop Once a month ammonia and petroleum Flue gas desulphurization device exit Flue gas volume, SO2, soot Online monitoring of 3-waste mixed-combustion furnace Waste gas One monitoring and emission exit in upwind direction, three in downwind Dust , ammonia gas Once a quarter direction of the factory community One monitoring site in the east, south, west and north four directions within Noise Noise dB（A） Once a quarter one meter around the factory community 11.2.2 Environment Monitoring Requirements To improve the level of environment monitoring and increase environment monitoring efforts, the enterprise is suggested to complete the following four aspects of work: a) Monitor regularly on major pollution sources, like multi-fuel boiler etc; b) To strengthen environment management of the project and based on the provisions of National Environment Monitoring Management Ordinance, the corporation shall establish environmental protection monitoring organization which takes full responsibility of environment monitoring work of the whole factory and purchase necessary instruments and devices. c) Establish advanced environment monitoring machine account and strengthen management on monitoring data. Monitoring data include sample and record interior analysis, original data and data sorting, and also report the statistics and information to supervisors. d) Environment monitoring shall be in the service for environment management. If there is any unusual situation in the process of environment monitoring, the incidents shall be reported to factory executive promptly. Detailed record shall be made about the incident which serves up as a basis for facility maintenance, production management, and clean production audit. 126 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 12 Benefits and Loss Analysis for Environment and Economy 12.1 Economic Benefit Analysis The total investment of this project is RMB 511,327,100, while annual average profit is RMB 85,032,800, making the investment return rate is 17.39%. The financial net present value of the project is RMB 128， ， 950 800. The project is of good financial benefits in operation and is feasible in finance. a) When the project is completed, it can recycle CO2 172889t/a from waste gas and it can be used in producing soda ash and ammonium chloride. The annual production capacity for soda ash is 400,000t, ammonium chloride 440,000t. It enjoys remarkable economic benefit. b) When the project is completed, by mixed-combustion centralized and fluidized “three wastes” produced from gas-making process of synthesis ammonia to make steam for industrial purpose. It can produce 2.5Mpa steam 75t/h for production device of the factory thus save a lot of energy and resources. In fact, it also creates economic benefits in a way. c) When the project is completed, it can greatly reduce the emission of waste gas and water and waste solid. It can not only protect the environment, but also it cuts enterprise’ expense for pollution treatment and emission. Therefore, the project brings good economic benefits. 12.2 Social Benefit Analysis a) The project takes comprehensive management and deep treatment measures to handle the produced “three wastes” and plays a role of reducing the impact on surrounding environment. b) The construction of the project can not only enable the construction company compete in future market and increase economic income; adjust product structure flexibly according to product market situation; increase market risk-handling ability; improve market competitive ability; but also it can promote the development of local economy; do good to protect ecological environment; make contributions in developing local economy and increasing local revenue. It enjoys excellent social benefits. 12.3 Environmental Benefit Analysis a) The project uses the technology of 3-waste fluidized mixed combustion, which conducts comprehensive treatment to the three wastes produced in the production process of synthesis ammonia so as to recycle the steam. The three wastes, namely are waste gas (blowing gas 127 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project from gas-making), waste solid (gas-making slag and dust from gas collector). It can also treat the waste gas produced in the production process of synthesis ammonia, urea, methanol, hydrogen making and other low-value waste gas, thus reduce the emission of three wastes. b) The project of comprehensive utilization of soda ash CO2 utilizes the original CO2 to produce soda ash and ammonium chloride, thus reduce the emission of CO2172889 t/a. c) The energy-saving effect of the project is quite obvious. It can recycle heat energy 128.69×106 kg/h and which means saving coal 35300t annually, water 220,000m3 on account of all the produced waste water can be recycled and reused. The environmental protection investment of the project is in Table 12–1. As Table 12–1 indicates, the estimate of environmental protection investment is RMB 14,900,000, amounting to 2.91% of total investment （RMB511,327,100）. Table 12–2 Environmental Protection Measures "Three Simultaneousness” Inspection and Environmental Protection Estimated Investment List Estimated Type Project Disposal measures and scale Result investment RMB5,000,000 flue gas from 3-waste bag-type dust removal using ( including flue mixed-combustion dust removal rate 99.86% current 100m exhaust funnel gas and dust furnace removal device) Exhaust gas of mother liquor and washing water In exhaust gas carbonization and RMB 1, 000, 000 wash NH3≤20mg/m3 filtration Waste gas exhaust gas of In exhaust gas ammonium drying collect dust by cyclone bag RMB 3, 000, 000 NH4Cl ≤1mg/m3 furnace exhaust gas of soda ash Soda ash in exhaust gas collect dust by cyclone bag RMB 3, 000, 000 and cold soda ≤1mg/m3 exhaust gas of mother liquor and washing water NH3 in exhaust gas carbonization and RMB 1, 000, 000 wash 20mg/m3 washing tower waste water from mixed-combustion RMB 500000 incorporate into factory terminal furnace sewage treatment plant and ground washing water recycle use after treatment Waste and sewage of RMB 500, 000 recycle use water circulating system first treat in the septic tank, then incorporate into factory terminal domestic sewage RMB 100, 000 sewage treatment plant and recycle use after treatment waste solid form Waste transport out to manufacture no emission in outer mixed-combustion / solid cement and building material environment furnace 128 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project transport out to be used as Sludge of salt slurry compound fertilizer noise produced by sound insulation and Noise RMB 300, 000 high-noise equipment vibration reduction noise reduction and Ecological plant community and greening environment quality RMB 500, 000 environment plant site improvement Total RMB 14, 900, 000 129 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project 13 Conclusions and Suggestions 13.1 Conclusions 13.1.1 Project Overview Project name: Chenzhou Qiaodan Chemical Industry Co., Ltd. 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project Project nature: technical transformation Construction site: factory area of Chenzhou Qiaodan Chemical Industry Co., Ltd. located in Qiaokou Town, Chenzhou City Investment Scale: total investment RMB511, 327,100 Production scale: a. 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization Project b. 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project Product scheme: a. 2.5Mpa steam 75t/h b.98.5% soda ash 40×104t/a c.≥90% ammonium chloride 44×104t/a Construction projects: (1) Build a new 75t/h 3-waste fluidized mixed-combustion furnace, recycle blowing gas from the entire factory and utilize the residual heat to produce steam, terminate the second phase construction of thermoelectricity co-production project (namely, stop constructing the second 75t/h 3-wastes fluidized mixed-combustion furnace and supporting device 12MW extraction turbo generator set), and use the current 15t/h residual heat furnace as a standby; (2) Build a set production line for 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project; (3) Build complementary supporting facilities. 13.1.2 Project Analysis a) The process selection of the project is very reasonable: the residual heat utilization of blowing gas from gas-making in synthesis ammonia selects 3-waste fluidized mixed-combustion furnace, which can not only recycle the residual heat in blowing gas, but 130 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project also can recycle other low-value waste gas and treat other pollutants in the gas-making process simultaneously. This kind of production process is not only safe, reliable, energy-saving, but also can solves difficult problems of comprehensive managing and treating waste gas and solid produced in gas-making. It protects the environment and achieves the aim of “turning two furnaces into one” and “turning two coals into one” in the production of the company. CO2 multipurpose utilization emission reduction project selects production technology of thick gas soda ash production by Hou’s process. Compared with ammonia-soda process, it enjoys high raw material utilization rate, low energy consumption, low cost, and simplified production workflow, saves construction investment, produces less three wastes and is good to environment. The construction of 75t/h gas-making 3-waste fluidized mixed-combustion furnace fully recycles the heat energy from gas-making blowing gas and synthesis purge gas. The recovered heat energy is 128.69×106kg/h，which means it can save standard coal 35300t annually. The increase and decrease situation of pollutant emission in project construction is as follows: CO2: Emission amount decreased by 449511t/a； SO2: Emission amount decreased by 164t/a； Smoke and dust: Emission amount decreased by 64t/a； NH3: Emission amount increased by 146t/a； Waste water: zero emission b) Constructing within Qiaodan Company, the project makes full use of original public utilities and supporting facilities. It completely utilizes current factory land with no land requisition, which saves construction investment and reduces construction time. It makes full use of equipment maintenance time to hook up production equipments so that it will not disturb the original production process and ensure the effective operation and normal production of the entire company. c) The economic benefit of the project is remarkable. It will expand production scale of the enterprise and improve product quality. d) The project produces little pollutant and also uses a series of advanced treatment measures: recycle use treated waste water and with zero emission; use effective bag-type dust remover to treat waste gas with dusts; comprehensive use waste solid etc. All these measures enable the 131 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project project to produce little pollutant. e) This is an environmental protection project. By comprehensive utilization, energy-saving and emission reduction, the project not only recovers substantial amount of heat energy, saves a lot of energy resources, but also greatly reduces the emission of pollutant. 13.1.3 Survey and Assessment of Current Environment Quality a) The ambient air quality is good in the region and all the monitored projects confirm the requirements of Class two standard in Ambient Air Quality Standard GB3095－96. b) The sound environment quality is good in the region. Noise in Qiaodan Chemical factory community confirms the requirements of Category standard of Standard of Noise at Boundary of Industrial Enterprises GB12348－2008. c) The monitoring value of each monitoring factor of the assessed river reaches two conventional monitoring sections in the Dongjiang River confirms the requirements of Category standard of Surface Water Environment Quality Standard GB3838-2002. 13.1.4 Environmental Impact Forecast Environmental impact analysis in construction period signifies the main negative factors on environment in construction period are construction dust and noise; the secondary factors are construction solid waste and waste water. Therefore, in construction period, prevention work must be well carried out to ensure that it has no negative impact on environment. Environmental impact prediction and analysis in post-construction period: a) Because the produced waste water can be recycled and achieve zero emission, it will not cause negative impact on water environment. b) The solid wastes in the project can all be comprehensive utilized. When it is well managed and prevented from dissipation; treatment procedures and comprehensive utilization companies are well implemented so that the solid wastes are not piled up and stacked for a long time, it will not cause obvious impact on environment. c) On the account of having taken certain sound insulation, noise elimination and sound deadening measures on all noise equipments of the project, it will not cause negative impact on surrounding environment. d) The emission of gas pollutants of the project is relatively little. By forecast, even in the most adverse weather conditions, the emission of SO2 from mixed-combustion furnace exhaust will not cause obvious impact on surrounding environment and concerning spots. 132 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project Because the project discharges ammonia, though the emission is little, it will still cause some impact on surrounding environment. After calculation, prevention distance of 400m should be set up around the emission source and within the distance, neither construction that is sensitive to environment should be constructed, nor should residents dwell. 13.1.5 Clean Production Level The project uses clean production technology encouraged by the state or national advanced technology in the industry to improve the production equipment of synthesis ammonia. It integrates three wastes comprehensive utilization process and pollutant control measures into main production procedure and reduces the production and emission of hazardous substance. The level of production technology is domestically advanced. The project takes a series of energy-saving and emission-reducing measures; therefore, the production procedure is advanced in material consumption and pollution emission aspects and so on, and also confirms with clean production requirements. 13.1.6 Public Participation Local public all hold positive attitude about the project and believe it can improve the development of local economy when the project is completed. But, in the process of implementing the project, sources of waste water and gas must be managed well. When economic benefit improves, environmental benefit and social benefit should improve at the same time. They shall follow the requirements of the Environmental impact Assessment report strictly, strengthen control and management of major pollution source, guarantee normal and steady operation of environmental protection devices, discharge according to standards, and minimize the impact on surrounding environment. 13.1.7 Final Conclusion Chenzhou Qiaodan Chemical Industry Co., Ltd. 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project is a major action for Qiaodan Company to upgrade its production structure and achieve the goal of saving energy and reducing emissions. Because the project takes a series of pollution prevention measures, the pollutant discharges can meet the standards. The main pollutants in the assessed area achieve reduction at different degrees and the environmental quality is improved after the construction of the project. EIA believes that, under the premise of taking strict pollution prevention 133 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project measures and guaranteeing standardized pollutants emission, from the aspect of environmental protection, the construction of the project is feasible. 13.2 Suggestions a) Build greenbelt around the factory community to alleviate the impact of noise and waste gas on surrounding environment. b) Set up ring mains in coal yard and temporary slag yard to water regularly and plant greenbelt around them also to alleviate the impact of dust on environment. c) Pay high attention to production safety; strengthen incident prevention and response measures. Monitor system and alarm device for leakage and malfunction emission shall be set up in both production equipment that uses dangerous chemical and storage room. Contingency plans shall be strictly formulated and drilled regularly to prevent pollution incidents. d) The company should strengthen production and equipment management; prohibit emission of pollutant without treatment, guarantee normal operation of all pollution prevention measures and emission of each pollutant confirming standards. e) According to project reality, the factory should employ full-time environmental protection professionals. The professionals shall formulate relevant environmental protection measures, coordinate environment management of the entire factory, take the responsibilities of daily environment management and monitor for the enterprise, guarantee normal operation and function of all environmental protection measures and the implementation of each environment management regulation. f) Carry out the “Three Simultaneousness” system strictly, guarantee normal operation and function of environmental protection facilities and emission of pollutant confirming standards; conduct inspection and maintenance to the “three wastes” treatment facilities regularly; prohibit direction emission of untreated “three wastes”. g) Conduct safety training to all factory staff regularly; implement risk prevention measures; establish advanced emergency responding mechanism, drill and team to minimize the rate of pollution incident. h) The dangerous chemicals and wastes in the main and supporting material, intermediate good and solid waste should be managed well. Follow the requirements of “Regulations on 134 EIA Report on the Carbon Dioxide Multipurpose Utilization Emission Reduction Project the Safety Administration of Hazardous Chemicals” strictly to standardize the whole process of purchasing, transporting, storing and using of hazardous chemicals; dispose hazardous wastes according to requirements. 135 Registration Form of Construction Project Environmental Protection for Examination and Approval Company: Hunan International Engineering Consultating Center Form Completed by (signature): Zhao Weihua Handled by (signature): Project name a. 75t/h gas-making 3-waste fluidized mixed-combustion furnace residual heat Current production section of Qiaodan Company, Qiaokou Town, utilization, b. 400,000t/a soda ash, CO2 multipurpose utilization emission Construction site Chenzhou City , Hunan reduction project Project content Project a and b: production capacity:2.5Mpa steam 75t/h; .98.5% soda ash □ new construction □construction renovation and expansion Nature of construction and scale 40×104t/a; .≥90% ammonium chloride 44×104t/a √ technical transformation Construction Industry environmental protection √compile report book □compile report form □fill out registration Project category management type form Total investment 51132.71 Investment for 1490 Percentage in total 2.91 （RMB 10,000） environmental protection investment（%） （10,000yuan） Department of Registered number of Date of project approval application application Report approval Environmental Protection Bureau of Hunan Province Registered number of Date of approval department approval Company name Chenzhou Qiaodan Chemical Industry Co., Contact 07352646323 Agency Hunan International 4517845 Ltd. number name Engineering Consultating Contact number Project Assessme Center owner nt agency Address 2010 Hunan International Address Chenzhou Qiaodan Chemical Industry Co., Postal code Business Center, No. 1139, 410016 Postal code Ltd. East erhuanxian, Changsha City Legal Yan Jianmin Liason Liu Huangxin Certificate State EIA Class B Assessment cost representative No. certificate NO. Current Environment Ambient air: class 2 Surface water: class Subterranean water: / Noise: class 2 Seawater: / Soil: / Other: / environment quality grade status of Environment □Drinking water source reserve □Natural reserve □Places of interest □Forest park □Basic farmland reserve □ecosystem function reserve □Key water loss and soil erosion project site sensitive features prevention zone □Ecologically sensitive and vulnerable zone □Dense populated zone □key historic preservation site Current project (completed and under The project （proposed to construct） Total projects (completed and under Replacin construction) construction and proposed to construct) g Standard Actual Permitted Total Approv Predicted Allowable Generat Self Predict Approv Curtailin Predicted Approve Increase curtailin pollutant Pollutants emission emission emissi ed emission emission ed curtaili ed ed g amount emission d d and g amount emission and concentrati concentrati on emissio concentrati concentrati amount ng emissio emissio by amount emission decrease by total quantity on on amoun n on on amount n n “carrying amount d regional control t amount amount amount the old emission balance (industrial with the amount construction new” project, fill Waste water —— —— 0 0 —— —— 0 0 0 0 0 in details) COD* 0 0 0 0 0 0 0 NH-N * 0 0 0 0 0 0 0 Petroleum Waste gas —— —— 55300 553000 —— —— 112364 112364 -250364 415000 415000 -138000 0 SO2* 628 628 225 225 -389 464 464 -164 Smoke and dust* 416 416 55 55 -159 312 312 -64 Industrial dust* NOX Industrial solid —— —— 0 0 —— —— 0 0 0 0 0 waste SS Other petroleu s m Note: 1. * represents pollutant that the state regulated emission total amount control in “the Tenth Five-year Plan” 2. Increased and decreased emission amount: (+) represents increase, (-) represents decrease 3. Unit of measurement: waste water emission amount: ten thousand t/a; waste gas emission amount: ten thousand standard m3/a; Industrial solid waste emission amount: ten thousand t/a; water pollutant emission concentration: mg/l; gas pollutant emission concentration: 1mg/m3; water pollutant emission amount: 1t/a; gas pollutant emission amount: t/a. Letter of Authorization for Working Out EIA on 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project Atten: Hunan International Engineering Consultating Center According to the relevant requirements of the Law on Environmental Impact Assessment of the People's Republic of China and Administrative Regulations on Environmental Protection of Construction Projects, we hereby issue this letter of authorization to Hunan International Engineering Consultating Center for working out EIA Report on the 75t/h Gas-making 3-Waste Fluidized Mixed-combustion Furnace Residual Heat Utilization and 40×104t/a Soda Ash Carbon Dioxide Multipurpose Utilization Emission Reduction Project of Chenzhou Qiaodan Chemical Industry Co., Ltd. Please organize qualified personnel to finish the EIA report as soon as possible. Consignor: Chenzhou Qiaodan Chemical Industry Co., Ltd. June 8, 2008