FIELD: process engineering.
SUBSTANCE: proposed invention relates to chemical and petrochemical industries. Acid gas flow containing carbon sulphide as initial material is fed into combustion stage in the presence of oxygen. Oxidising conditions are selected so that carbon sulphide-to-sulfur dioxide exceeds 2:1. Combustion products flow is directed to catalytic stage of Klaus reaction which results in reaction gas containing sulfur to be extracted therefrom. End gas containing less than 1000 ppmv of sulfur dioxide is fed into biological system of gas desulfuration. Said biological system allows producing sulfur and neutral gas containing less than 100 ppmv of carbon hydrogen.
EFFECT: reduced content of sulfur dioxide in Klaus process end gases, hence, reduced consumption of alkali and lower operating costs.
17 cl, 2 dwg, 1 tbl, 1 ex
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