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Title:
PURE WATER PRODUCING FACILITY AND METHOD OF ELONGATING SERVICE LIFE OF ION-EXCHANGE RESIN
Document Type and Number:
Japanese Patent JP2013022521
Kind Code:
A
Abstract:

To provide a pure water producing facility capable of producing pure water with high purity without replacing ion-exchange resin for a long time, and to provide a method of elongating the service life of the ion-exchange resin.

The pure water producing facility includes: a filtering device 10 removing impurities included in raw water; an RO membrane device 20 reducing dissolved ion components included in filtrate water passed through the filtering device 10 to 20 mg/L or less in total; and an ion exchange device 30 making treatment water passed through the RO membrane device 20 sequentially come into contact with cation-exchange resin and anion-exchange resin to produce pure water.


Inventors:
NAKAJIMA TOSHIYA
Application Number:
JP2011000159946
Publication Date:
February 04, 2013
Filing Date:
July 21, 2011
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
C02F1/42; B01D61/02; B01D61/04; B01D63/06; B01D63/10; C02F1/28; C02F1/44; C02F9/00
Domestic Patent References:
JPS6328486A1988-02-06
JP2008055317A2008-03-13
JPS6336890A1988-02-17
Attorney, Agent or Firm:
Kenji Sugimura
Kengo Yoshida