发明授权
- 专利标题: Method for treating chlorine-containing waste
- 专利标题(中): 含氯废物处理方法
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申请号: US12090049申请日: 2006-10-16
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公开(公告)号: US08048314B2公开(公告)日: 2011-11-01
- 发明人: Masayoshi Konishi , Hideho Hayashi , Ikuko Watanabe , Takehiko Itoh , Takayuki Kuroiwa , Taichiro Fujimaki
- 申请人: Masayoshi Konishi , Hideho Hayashi , Ikuko Watanabe , Takehiko Itoh , Takayuki Kuroiwa , Taichiro Fujimaki
- 申请人地址: JP Tokyo JP Tokyo
- 专利权人: Sumitomo Osaka Cement Co., Ltd.,Japan Water Systems Corporation
- 当前专利权人: Sumitomo Osaka Cement Co., Ltd.,Japan Water Systems Corporation
- 当前专利权人地址: JP Tokyo JP Tokyo
- 代理机构: Merchant & Gould P.C.
- 优先权: JPP2005-301413 20051017
- 国际申请: PCT/JP2006/320548 WO 20061016
- 国际公布: WO2007/046325 WO 20070426
- 主分类号: C02F1/62
- IPC分类号: C02F1/62
摘要:
The present invention provides a method and an apparatus for treating a chlorine-containing waste, which can separate and recover a chlorine component from a chlorine-containing waste, and also can achieve a high chlorine removal thereby obtaining a high purity chlorine compound, and can decrease the amount of water for recovering chlorine. The method for treating a chlorine-containing waste of the present invention comprises a washing/filtrating step of adding water to the chlorine-containing waste, followed by mixing to form a first slurry, separating the first slurry into a solid and a filtrate through filtration, and using the resulting solid as a cement raw material; a filtrate treating step of adding a reducing agent and a pH adjustor to the filtrate to form a sediment containing heavy metal and calcium contained in the filtrate, and separating the sediment through filtration; a crystallization step of concentrating the filtrate, from which the sediment has been removed, through heating and evaporation to form a second slurry in which a chlorine compound contained in the filtrate has been crystallized, separating the second slurry into a solid containing a chlorine compound and a mother liquor, and recovering the solid; and a separated mother liquor treating step of returning a portion of the mother liquor to a cement manufacturing facility.