| 摘要 |
<p>PCT No. PCT/FR98/00816 Sec. 371 Date Nov. 16, 1998 Sec. 102(e) Date Nov. 16, 1998 PCT Filed Apr. 23, 1998 PCT Pub. No. WO98/47813 PCT Pub. Date Oct. 29, 1998A method for removing the sulphur compounds H2S, SO2 and at least one of COS and CS2 contained in a waste gas is provided. In this method, the waste gas is catalytically hydrolyzed to form a hydrolyzed gas containing H2S and SO2, which is free of COS and CS2. After cooling, the hydrolyzed gas is introduced in one of two Claus catalytic zones mounted in parallel, while the other catalytic zone is regenerated and cooled. The regeneration is carried out with a gas stream drawn from the hydrolyzed gas before it is cooled, the regeneration gas effluent from the Claus catalytic zone is re-injected into the hydrolyzed gas between the drawing of the regeneration gas stream and the cooling of the hydrolyzed gas. The cooling of the Claus catalytic zones is carried out with a portion of unhydrolyzed gas drawn from the waste gas, the cooling gas effluent from the Claus catalytic zone is re-introduced into the waste gas between the drawing of the unhydrolyzed gas portion and a heating of the waste gas before hydrolysis.</p> |
