Abstract: During the process of CDQ operation, the bled gases from red-hot coke charging，prechamber and cooled coke discharging are treated in a combination of desulfurization and dedusting by using dedusting station and desulfurization column. As a result，the emission concentration of particulate matter and SO2 are 1.4 mg/m3 and 10 mg/m3 respectively, which can meet the requirement of national standard. With rising in SO2 concentration，the SDS process shows better performance than CFB in desulfurization

Key words:  , Coke Dry Quenching (CDQ), Bled gases, Desulfurization