Abstract: This paper introduced several conventional control and treatment methods for top gas of acidic water tanks. A new gas treatment technology was proposed and applied commercially, where the pressure of acidic gas was boosted by water ring vacuum pump followed by water washing to remove ammonia, the treated gas then entered into the amine tower to wipe out H2S, the cleaned gas was then discharged to flare system. The H2S concentration in the cleaned gas is reduced to 1.40μL/L. The classified process of gas components is realized in this way, and the effect is remarkable.

Key words: acidic water, hydrogen sulfide, water scrubber, amine scrubber