METHOD AND DEVICE FOR CLEANING FILTER CLOTHS OF FILTER PRESS DEWATERER

Title:

METHOD AND DEVICE FOR CLEANING FILTER CLOTHS OF FILTER PRESS DEWATERER

Document Type and Number:

WIPO Patent Application WO/2010/004955

Kind Code:

A1

Abstract:

Provided is a method and a device for cleaning filter cloths of a filter press dewaterer that do not use acid, which requires wastewater treatment, and that allow regeneration of filter cloths by effectively cleaning the filter cloths while controlling the amount of water used for cleaning. The method is for cleaning filter cloths of a filter press dewaterer, which dewaters slurries containing calcium components by means of water, steam or a mixture thereof. The filter cloths are cleaned by spraying water of 100‑140°C temperature and 50‑200 kg/cm2 pressure, steam of 100‑140°C temperature, or a mixture thereof, on said filter cloth, whereon tension of 10‑2000 N/5 cm has been applied.

Inventors:

KATAKURA MASAHIKO (JP)
SUZUKI TAKAO (JP)
NAKAMURA TOMOMICHI (JP)
WADA HAJIME (JP)

Application Number:

PCT/JP2009/062286

Publication Date:

January 14, 2010

Filing Date:

July 06, 2009

Export Citation:

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Assignee:

MITSUI SHIPBUILDING ENG (JP)
TAIHEIYO CEMENT CORP (JP)
KATAKURA MASAHIKO (JP)
SUZUKI TAKAO (JP)
NAKAMURA TOMOMICHI (JP)
WADA HAJIME (JP)

International Classes:

B01D25/12; B01D33/04; B01D41/04; C02F11/12

Foreign References:

JPH066655Z
JPS53148160A	1978-12-23
JPS53126305A	1978-11-04
JPH07136430A	1995-05-30
JPH0338105U	1991-04-12
JPH04122612U	1992-11-04
JPH10263318A	1998-10-06
JP2000185206A	2000-07-04
JPH06304417A	1994-11-01
JPS62286510A	1987-12-12
JP2001347110A	2001-12-18

Other References: