POT FURNACE, HEATED BY FLAMELESS
COMBUSTION OF BIO-FUEL
Glafo, Box 3093, SE-350 33 Växjö, Sweden
Phone: +46 470 10090, E-mail: email@example.com
Today melting of glass is made in two types of furnaces. Glass tanks are used for
large and continuous production and pot furnaces for melting on a smaller scale. The
pot furnaces are mostly heated with LPG or oil through one or two burners installed in
The advantage with pot furnaces is the flexibility and the disadvantage is a very high
The aim of the project is to show the possibility of replacing today’s LPG or oil-heated
pot furnaces with new, more advantageous technique, based on high temperature
gasified bio-fuel, which is burned with so-called flameless oxidation burners and pre-
heated combustion air.
The fuel gas/air ratio in different parts of the furnace will be varied in such a way that
the production of NOx, from combustion, will be minimized.
Other advantages with this technique are less energy consumption and reduction of
Significant for the flameless oxidation technique, which will be tested in the project, is
that strongly pre-heated combustion air is lead in to the furnace where it will be mixed
with the fuel gas.
The aim of the project is to
point out the technical possibilities of replacing fossil fuels with bio-fuels in pot
furnaces for glass melting
investigate if heating with bio-fuels in pot furnaces has any influence on the
quality of the produced glass
lower the energy consumption in pot furnaces, per kilo glass, when using bio-
fuel, compared to using fossil fuel
decrease the environmental strain in the state of nitric oxides when using bio-
fuel in pot furnaces, compared to typical values at heating with fossil fuels.
A furnace at Kosta Glassworks has been re-built for producer-gas power and
flameless oxidation burners. The furnace will be used for production and measuring
of operation parameters as, e.g. temperature and fuel consumption.