GENERATION RESTRAINT METHOD OF DIOXINS CONTAINED IN EXHAUST GAS IN REFUSE INCINERATOR

摘要

PROBLEM TO BE SOLVED: To execute secondary combustion, cooling and agitation of combustion exhaust gas generated during refuse incineration in a refuse incinerator properly and restrain a blowing-through rise of an unburnt gas and restrain the generation of dioxins. ;SOLUTION: The lower part of a flue 5 which discharges combustion exhaust gas generated from a combustion chamber 2 of a refuse incinerator is use as a gas mixing chamber 8 while mixing and agitation air blowing nozzles 9 and cooling air blowing nozzles 11 are provided on a side wall on both sides and or on a side wall in front and rear. A secondary combustion air blowing group 10, which is directed at the opposed side walls, is provided on the left side of the lower part of the gas mixing chamber located above a dry fire grate 3a of the combustion chamber 2 or on the right side of a side wall, thereby generating a revolving air current by the air blown in from each nozzle group 10 in the gas mixing chamber and mixing an unburnt gas with the combustion gas to a satisfactory extent. The unburnt gas is burnt secondarily with high efficiency by the secondary combustion air from the secondary combustion air blowing nozzles 10, thereby restraining the generation of dioxins from the exhaust gas.;COPYRIGHT: (C)1998,JPO