Method of abating nitrogen oxides in combustion waste gases
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United States of America Patent
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Apr 21, 1981
Issued Date -
N/A
app pub date -
Feb 26, 1980
filing date -
Mar 15, 1978
priority date (Note) -
Expired
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Abstract
A method of abating nitrogen oxides in waste gases resulting from a combustion process comprises the steps of introducing the nitrogen oxides-(NOx-)containing waste gases into an enclosed furnace body having surrounding wall, at an opening of a reduced cross sectional area formed in the bottom of the furnace body, while feeding fuel and ground raw material into the furnace portion above the gas inlet opening, thus forming a jet zone, producing a reducing atmosphere in the jet zone as a result of incomplete combustion of the fuel caused by insufficient supply of air (or oxygen) for the combustion, and then bringing into mutual contact and mixing the combustion waste gases and thermal decomposition of the material, and thereby reducing the NOx in the combustion waste gases through the catalytic action of the thermal decomposition products, and an apparatus for practicing the method.
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