| 摘要 |
<p>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.</p> |
