Title:
METHOD FOR RECYCLING COOLING WATER EFFLUENT AND RECYCLING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2015/136992
Kind Code:
A1
Abstract:
In recycling a cooling water effluent through RO membrane treatment, the present invention reduces the cost of water treatment, enhances the recovery ratio of water, and stabilizes the treatment of water, said cooling water effluent including blow water in a circulating cooling water system. The present invention is a water recycling method which comprises subjecting a cooling water effluent discharged from a circulating cooling water system to treatment in a water reclamation system including both a pretreatment membrane and an RO membrane and returning the treated water to the circulating cooling water system, wherein a dispersant that can permeate the pretreatment membrane is added in the circulating cooling water system as a dispersant for dispersing scale components. In other words, this method comprises using a dispersant-permeable membrane as the pretreatment membrane precedent to the RO membrane and thereby enabling a dispersant added in the circulating cooling water system to be effectively utilized also in the water reclamation system. Thus, the present invention can reduce the cost of water treatment, enhance the recovery ratio of water, and stabilize the treatment of water.
Inventors:
HAYAKAWA KUNIHIRO (JP)
UCHIDA TAKAHIKO (JP)
UCHIDA TAKAHIKO (JP)
Application Number:
PCT/JP2015/051685
Publication Date:
September 17, 2015
Filing Date:
January 22, 2015
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/44; B01D21/01; B01D61/02; B01D61/08; B01D61/12; B01D61/14; B01D61/18; B01D61/22; B01D61/58; C02F1/56; C02F5/00; C02F5/08; C02F5/10
Domestic Patent References:
| WO2012132892A1 | 2012-10-04 |
Foreign References:
| JP2003001256A | 2003-01-07 | |||
| JPH1133362A | 1999-02-09 | |||
| JP2000202445A | 2000-07-25 | |||
| JP2010188344A | 2010-09-02 | |||
| JP2010029757A | 2010-02-12 | |||
| JP2013255923A | 2013-12-26 | |||
| JPH07151491A | 1995-06-16 | |||
| US20130056413A1 | 2013-03-07 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
Takeshi Shigeno (JP)
Takeshi Shigeno (JP)
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