METHOD FOR PROCESSING FLY ASH IN FLUIDIZED-BED INCINERATOR

PURPOSE:To provide a method for processing fly ash in a fluidized-bed incinerator for igniting waste material and the like in which its sensitive heat is utilized to heat non-processed fly ash so as to cause the ashes to be non-harmful CONSTITUTION:In a method for processing fly ash in a fluidizedbed incinerator 1 having a sand circulation line in which mixture D of ignited sludges and sand F is classified and non-ignited substances are discharged out of a system and the sand is supplied again to a fluidized bed, sensitive heat contained in the mixture D extracted from a bottom part of the incinerator is utilized, the material from the fluidized-bed incinerator or other waste materials are melted through indirect heating, non-processed fly ash A generated from the incinerator are heated so as to decompose harmful substances such as dioxin in the non- processed fly ash so as to make them non-harmful. Due to indirect heating, the fly ash may not be mixed with other materials, a facility cost and a fuel fee can be reduced and an efficient non-harmful processing of the harmful substance can be attained.