method for removal of hydrogen sulfide from a hydrogen sulfide and excess quantities of steam and ammonia containing gas mixture

摘要

A method for removing hydrogen sulphide from a mixture gas containing hydrogen sulphide and containing steam and ammonia is disclosed. A mixture gas which contains less than 70 vol. % of steam, 5-20 vol. % of ammonia, less than 10 vol. % of hydrogen sulphide, and other inert gases is reacted on a catalyst by means of air or oxygen so as to convert the hydrogen sulphide (H2S) into ammonium thiosulfate ((NH4)2S2O3) and into elemental sulphur (S), thereby completely removing the hydrogen sulphide from the mixture gas. The present invention can be applied typically to pretreating a waste mixture gas of a steel manufacturing plant (in which ammonia is used for absorbing H2S), before incinerating it in an ammonia incinerating furnace.