Title:
METHOD AND EQUIPMENT FOR THE DISPOSAL OF CHLORINE-CONTAINING WASTE
Document Type and Number:
WIPO Patent Application WO/2007/046325
Kind Code:
A1
Abstract:
The invention provides a method for the disposal of chlorine-containing waste which
can separate and recover chlorine components from chlorine-containing waste
and which attains high chlorine removal efficiency, formation of high-purity chlorine
compounds, and reduction in the water consumption for the recovery of chlorine;
and equipment for the disposal thereof. The method is characterized by comprising
the water-washing and filtration step of separating a slurry containing chlorine-containing
waste and water into a solid matter and a filtrate and recycling the solid matter
as raw material for cement, the filtration step of adding a reducing agent and
a pH regulator to the filtrate to form a precipitate containing heavy metals and
calcium and separating the precipitate by filtration, the crystallization step
of concentrating the obtained filtrate under heating through evaporation to
form a slurry containing crystals of chlorine compounds, separating this slurry
into a solid matter containing chlorine compounds and a mother liquor, and recovering
the solid matter, and the mother liquor disposal step of recycling part of the
mother liquor to a cement production plant.
Inventors:
KONISHI MASAYOSHI (JP)
HAYASHI HIDEHO (JP)
WATANABE IKUKO (JP)
ITOH TAKEHIKO (JP)
KUROIWA TAKAYUKI (JP)
FUJIMAKI TAICHIRO (JP)
HAYASHI HIDEHO (JP)
WATANABE IKUKO (JP)
ITOH TAKEHIKO (JP)
KUROIWA TAKAYUKI (JP)
FUJIMAKI TAICHIRO (JP)
Application Number:
PCT/JP2006/320548
Publication Date:
April 26, 2007
Filing Date:
October 16, 2006
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
JAPAN WATER SYSTEMS CORP (JP)
KONISHI MASAYOSHI (JP)
HAYASHI HIDEHO (JP)
WATANABE IKUKO (JP)
ITOH TAKEHIKO (JP)
KUROIWA TAKAYUKI (JP)
FUJIMAKI TAICHIRO (JP)
JAPAN WATER SYSTEMS CORP (JP)
KONISHI MASAYOSHI (JP)
HAYASHI HIDEHO (JP)
WATANABE IKUKO (JP)
ITOH TAKEHIKO (JP)
KUROIWA TAKAYUKI (JP)
FUJIMAKI TAICHIRO (JP)
International Classes:
B01D9/02; B09B3/00; C02F1/58; C02F1/62; C04B7/38; C04B7/60
Foreign References:
| JPH1076247A | 1998-03-24 | |||
| JP3304300B2 | 2002-07-22 |
Attorney, Agent or Firm:
SHIGA, Masatake et al. (Yaesu Chuo-ku, Tokyo 53, JP)
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