焼却残渣の処理方法及び処理システム

Treatment method and treatment system for incinerated residue

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method having a high treatment efficiency, which removes a soluble chloride component and a poorly-soluble chloride component from an incinerated residue to obtain an incinerated residue usable as a cement raw material, and in which treatment equipment is simple, an operational load is small, and the water volume for treatment can be reduced. <P>SOLUTION: The treatment method includes (A) a process of watering artificially by a water supply means 20 to the incinerated residue pooled in a space for pooling 2 to obtain the incinerated residue from which the soluble chloride component is removed, and a filtrate, (B) a process of watering by rainfall to the incinerated residue in a space for pooling 3 treated in the process (A) to obtain the incinerated residue from which the poorly-soluble chloride component is removed, and a filtrate, and (C) a process of using the filtrate discharged from the space for pooling 3 as water for water supply to the space for pooling 2 through a passage for recovering the filtrate 7, a water route 17 or the like. A space for pooling 1 is a space during land fill operation of the incinerated residue. The use of each space for pooling is changed for landfill operation, for removing the soluble chloride component, and for removing the poorly-soluble chloride component in order. <P>COPYRIGHT: (C)2010,JPO&INPIT
【課題】焼却残渣から可溶性塩素成分及び難溶性塩素成分を除去して、セメント原料として用い得る焼却残渣を得るための処理方法であって、処理設備が簡易で運転上の負荷が小さく、処理用の水量を削減することができ、処理効率が高い処理方法を提供する。 【解決手段】(A)貯留用空間2内に貯留した焼却残渣に対して、給水手段20により人為的に給水して、可溶性塩素成分を除去した焼却残渣、及び、濾液を得る工程と、(B)工程(A)で処理済みの貯留用空間3内の焼却残渣に対して、降雨により給水して、難溶性塩素成分が除去された焼却残渣、及び、濾液を得る工程と、(C)貯留用空間3から排出された濾液を、濾液回収用流路7、送水路17等を介して、貯留用空間2への給水用の水として用いる工程を含む。貯留用空間1は焼却残渣の埋立作業中の空間である。各貯留用空間は、埋立作業用、可溶性塩素除去用、難溶性塩素除去用の順に用途を変えていく。 【選択図】図1

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