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Title:
METHOD FOR DETOXIFYING POLLUTED SOIL
Document Type and Number:
Japanese Patent JP3876360
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To crush polluted soil into a fluid state and to easily handle the soil by changing the polluted soil or a polluted powder material into a slurry state with water.
SOLUTION: The polluted soil is changed into slurry with water, and the obtained slurry is classified in a wet state with a vibrating screen 12 to remove foreign matters such as pebbles and iron. Then the slurry is dried with a dryer 15 and heated with a heating kiln 17 to vaporize or decompose organic chlorine compounds such as dioxins and mercury. The soil is rapidly cooled with a cooler 18 to prevent reproduction of the organic chlorine compounds. The waste gas produced in the drying and heating processes is directly or indirectly cooled with water and condensed. The organic chlorine compounds such as dioxins, SS, mercury or the like are collected in the obtained condensed water. Thereby, the succeeding process of wet classification to remove foreign matter such as pebbles and metals is facilitated, and scattering of fine particles of the polluted soil in the work of storing, carrying or the like can be prevented.


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Inventors:
Ueda Kozo
Fukatsu Rei
Kenji Kakeda
Shozo Umemura
Application Number:
JP2002163732A
Publication Date:
January 31, 2007
Filing Date:
June 05, 2002
Export Citation:
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Assignee:
Hitachi Zosen Corporation
International Classes:
B09C1/06; A62D3/40; B01D36/02; B01D53/64; B01D53/70; B01D53/77; B03B5/00; B09C1/00; B09C1/04; C07B35/06; C07B37/06; C07D319/24; A62D101/22; A62D101/28; (IPC1-7): B09C1/06; A62D3/00; B01D36/02; B03B5/00; B09C1/04; C07B35/06; C07B37/06; C07D319/24; //B01D53/64; B01D53/70; B01D53/77
Domestic Patent References:
JP6233977A
JP2000225387A
JP5208184A
JP2001259610A
JP5192648A
JP2002059151A
JP2001129506A
JP1146567A
JP2002126716A
JP10296231A
Attorney, Agent or Firm:
Einosuke Kishimoto
Akira Watanabe
Norihiko Hibi
Kiyosue Yasuko



 
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