EXHAUST GAS TREATMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas treatment method capable of preventing dust discharged from a melting furnace and containing a Na compound from adhering to a water pipe of a waste heat boiler and from solidifying.SOLUTION: An exhaust gas treatment method of the present invention is an exhaust gas treatment method for an exhaust gas treatment facility comprising a waste heat boiler 30 provided in a gas duct 20 for exhaust gas containing a Na compound in dust discharged from a melting furnace 12, comprises supplying powder containing an alkaline component into the gas duct 20 before the exhaust gas is introduced into the waste heat boiler 30 so as to prevent sodium hydrogensulfate from solidifying on a water pipe 32 of the waste heat boiler 30.SELECTED DRAWING: Figure 1