A method for improving the efficiency of hydrogen sulfide distillation during coke oven gas refining process

摘要

The present invention relates to a distillation apparatus comprising two distillation columns in a coke oven gas purification process of a steelworks, characterized in that distillation efficiency and absorption efficiency are improved by adjusting the supply position of the ammonia aqueous solution absorbing hydrogen sulfide in the coke oven gas The present invention relates to a method for improving the efficiency of distillation of hydrogen sulfide in a coke oven gas purification process, in which the efficiency of distillation of hydrogen sulfide and hydrogen cyanide is greatly improved and the concentration of hydrogen sulfide and hydrogen cyanide discharged is greatly reduced. The air pollution can be reduced and the load of the wastewater treatment facility can be reduced, thereby reducing the operation cost required for treating hydrogen cyanide.