To provide an exhaust gas processing unit of an ash melting furnace which highly efficiently removes a toxic substance such as nitrogen oxides and dioxin and the like.
This device treats exhaust gas exhausted from the ash melting furnace for melting ash generated by combustion of a combustion furnace, and has a boiler 12 for cooling a temperature of the exhaust gas to about 220°C from about 850 to 1,000°C, a front stage side dust collector 13 for performing dust-collecting and denitration from the exhaust gas cooled to about 220°C, and to which a reducing agent and activated charcoal 22 are supplied, and a rear stage side dust collector 14 for collecting dust from the exhaust gas of about 230 to 240°C to which an alkali neutralizer 20 and the activated charcoal are supplied, and simultaneously performing desulfurization, desalting, denitration, and removal of dioxin and the like, and is characterized in that at least one of the dust collectors 13 and 14 is a multilayer bag filter formed by laminating a plurality of filter cloths with a catalyst layer between the filter cloths.
SAEKI KENTARO
KOBAYASHI KATSUHIKO
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