Wet-desulfurization system One sets desulfurization device processing gas quantity from minimum 1000 m3 / h to 65000 m3 / h, the H2S in gas removaled by wet desulphurization system. after desulfurization treatment, the minimum H2S in gas can reach stable below 10 mg/Nm3, sulfur can be recycled, after burning gas, the concentration of SO2 in exhaust gas completely meet the requirements of the national environmental protection emission standard.