METHOD FOR CONTROLLING THE TEMPERATURE IN THE COMBUSTION FURNACE OF A CLAUS UNIT
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United States of America Patent
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Issued Date -
Mar 19, 2015
app pub date -
Mar 27, 2013
filing date -
Apr 12, 2012
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method for reducing the nitrogen content in the oxygenous oxidation gas of a Claus plant, by which control of the temperature in the combustion furnace of a Claus plant can be achieved, by combusting a sulphurous acid gas in a Claus combustion furnace so that a sulphur dioxide-containing product gas is obtained, from which a part-stream is branched off, which, as determined by a measured value, is recycled to the oxygenous oxidation gas so to avoid an undesired temperature increase in the combustion furnace, when, occasionally, an acid gas which is very rich in sulphur is fed to the combustion furnace of a Claus plant, and to at the same time achieve a reduction of the nitrogen content in the Claus tail gas.
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