Thermal Oxidizers by stelterbrinck

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									                                         Thermal Oxidizers
Volatile Organic Compounds (VOCs) and Hazardous Air Pollutants (HAPs) are the classifications of
pollutants emitted by air streams from industrial processes. These pollutants, mostly made up of
hydrocarbons, are harmful to the environment as well as humans. Thus, thermal oxidizers are placed in
industrial streams to turn the hydrocarbons in VOCs and HAPs from CO2 to H2O.

The block design of thermal oxidizers is composed of an oxidation chamber wherein incoming exhaust
from the process system is treated with high temperature combustion, triggered by an igniter and
air/oxygen-fuel mixture. There is also a blower which manages the flow density of the incoming exhaust
and the time of exposure to combustion before being flushed out (for maximum Destruction & Removal
Efficiency i.e. DRE). The two main configurations of thermal oxidizers are recuperative and regenerative.
Their models can be seen below.




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Regenerative oxidizers are the most widely used type of pollution control technology. They are energy
efficient and have high DRE’s (up to 99%+). Recuperative thermal oxidizers are less common than
regenerative systems. This unit uses a heat exchanger to basically “exchange” clean air with the polluted
air. There is a third type of thermal oxidizer not mentioned above, called an afterburner, which are only
used on occasion. Afterburners are direct-fired units, which are the least-capital intensive, but are only
used in situations in which there are a very high concentration of VOCs.

The major contributors of HAPs and VOCs to the environment are industries involving manufacture of
cement, ceramics, glass, detergents, alcohol, fertilizers, inorganic and organic chemicals,
petrochemicals, pharmaceuticals, polymers, resins, PVCs, etc. Thus, thermal oxidizers are needed in
these industries to monitor exhausts and to adhere to stringent emission criteria.

For more information on thermal oxidizers, contact Stelter & Brinck at 513-367-9300 or
http://www.stelterbrinck.com/thermal-oxidizers.htm

Keywords: Thermal Oxidizer, regenerative thermal oxidizer, RTO, air pollution controls, recuperative
thermal oxidizers, afterburners, voc destruction, incinerators, stelter brinck,

								
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