METHOD FOR EFFICIENT REMOVAL OF ACID SULFIDE GASES USING AMMONIARY DESULPHURIZATION

摘要

A method for efficiently removing acidic sulphide gases using ammonia desulphurisation involves the steps of 1) pretreatment, where sulphides in acid gas are exposed to pretreatment methods for sulfur extraction, acid formation and / or incineration, converting the remaining sulfur in acid gas to sulfur oxides, and acid tail gases with sulfur oxides; and acid gas is obtained from the petrochemical industry, the gas chemical industry of natural gas, the coal chemical industry, and the like; 2) ammonia absorption of sulfur oxides, where they allow the flow of acidic tail gases with sulfur oxides into the ammonia absorption device and the solution for cyclic absorption is used to absorb sulfur oxides; and 3) the subsequent treatment of ammonium sulfate, where the saturation absorption solution is subjected to concentration, crystallization, separation into solids-liquid and drying to obtain a solid product of ammonium sulfate. Sulfur oxides (including sulfur dioxide, sulfur trioxide and their hydrates) in the acid tail gas are removed, and sulfuric acid, sulfur and ammonium sulfate are formed as by-products, and the purified gas is removed to meet the standards for air emissions.