Title:
REGENERATIVE ION EXCHANGE DEVICE AND OPERATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/037870
Kind Code:
A1
Abstract:
According to the present invention, a supply pipe 3 for pretreated water W to be subjected to ion exchange is coupled to the upper part of a regenerative ion exchange column 1, whereas a discharge pipe 4 for ion exchange-treated water W1 is coupled to the lower part of the regenerative ion exchange column 1. A pipe 5 and a pipe 6 for respectively supplying a NaOH solution and hydrochloric acid (HCl), which are regeneration drug liquids, are respectively coupled to the supply pipe 3 and the discharge pipe 4. In addition, a discharge pipe 7 for waste water to be regenerated is coupled to a side section of a column body 1A. In addition, the discharge pipe 4 has a resistivity meter 8, and a sodium ion electrode 9 for measuring the sodium ion (Na+) concentration of the ion exchange-treated water W1. According to the regenerative ion exchange device, short-term fluctuations can be inhibited in the concentrations of sodium ions (Na+) and chloride ions (Cl-) in treated water in a secondary pure water system (sub-system) provided subsequent to the regenerative ion exchange device.
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Inventors:
YOKOI IKUNORI (JP)
Application Number:
PCT/JP2017/028177
Publication Date:
March 01, 2018
Filing Date:
August 03, 2017
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/42; B01J39/05; B01J39/07; B01J39/20; B01J41/05; B01J41/07; B01J41/14; B01J47/022; B01J47/026; B01J47/04; B01J49/08; B01J49/09; B01J49/53; B01J49/57; G01N27/416
Foreign References:
| JPH1128462A | 1999-02-02 | |||
| JP2014172795A | 2014-09-22 | |||
| JPS489792U | 1973-02-02 | |||
| JPS4813540U | 1973-02-15 | |||
| JP2014168743A | 2014-09-18 | |||
| JP2016076588A | 2016-05-12 | |||
| JPS47041053A | ||||
| JPH09117679A | 1997-05-06 |
Attorney, Agent or Firm:
HAYAKAWA Yuzi et al. (JP)
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