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Patent Searching and Data


Title:
SUCTION FILTRATION/CONCENTRATION METHOD AND SUCTION FILTRATION/CONCENTRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/113822
Kind Code:
A1
Abstract:
A suction filtration/concentration method which comprises a sludge supply stage in which sludge is supplied to a filtration/concentration tank, a filtration/concentration stage in which the supplied sludge is concentrated by filtration within the filtration/concentration tank, a thick-sludge separation stage in which the thick sludge obtained by the filtration/concentration is separated from the outer surface of the filter cloth, and a thick-sludge discharge stage in which the separated thick sludge is discharged outside the filtration/concentration tank, wherein the filtration/concentration stage involves a step in which the thick sludge is adhered to the outer surface of the filter cloth by continuously performing suction at a given suction pressure that enables the thick sludge to retain the shape thereof even when separated in unconcentrated sludge, and the thick-sludge separation stage involves a step in which water is continuously and forcedly sent to the filter cloth via the filtration chamber over a given period to thereby separate, in the supplied unconcentrated sludge, the thick sludge (filter cake) adherent to the outer surface of the filter cloth. A suction filtration/concentration device is provided.

Inventors:
NISHIO AKIRA (JP)
TABATA MASAO (JP)
KUNITANI TADASHI (JP)
Application Number:
PCT/JP2010/055455
Publication Date:
October 07, 2010
Filing Date:
March 26, 2010
Export Citation:
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Assignee:
METAWATER CO LTD (JP)
NISHIO AKIRA (JP)
TABATA MASAO (JP)
KUNITANI TADASHI (JP)
International Classes:
B01D24/46; B01D29/00; B01D29/11; B01D29/25; B01D29/37; B01D29/66; B01D35/22; C02F11/121
Foreign References:
JP2004321997A2004-11-18
JP2001252698A2001-09-18
JPS63270513A1988-11-08
JP2006218455A2006-08-24
JP2000325998A2000-11-28
JPH04225805A1992-08-14
Attorney, Agent or Firm:
WATANABE, Kazuhira (JP)
Ippei Watanabe (JP)
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