Method of and apparatus for preventing emission of dioxins in

Abstract

An apparatus for preventing the emission of dioxins in an incineration facility including an incinerator having a boiler, and an exhaust gas treatment facility for treating exhaust gas discharged from a flue of the boiler. This apparatus further includes a steam supply pipe for supplying steam into a water tube or a downcomer of the boiler from an auxiliary boiler or another steam-generating source, a flue damper for opening and closing the flue of the boiler, a detector for detecting the temperature of gas within the boiler at a point disposed upstream of the flue damper, and a damper control device responsive to a temperature, detected by the detector, for opening and closing the flue damper. In a starting operation of the incineration facility, the flue damper is closed, and in this condition steam is supplied into the water tube or the downcomer of the boiler from the steam supply pipe, thereby raising the temperature of a body of the boiler, and also raising the temperature of gas within the boiler through boiler water, and the flue damper is opened when the detector detects the fact that the gas within the boiler reaches a predetermined temperature, thereby preventing dioxins, residing or remaining in the incineration facility, from being discharged to the exterior.