Search International and National Patent Collections

1. (WO2018037870) REGENERATIVE ION EXCHANGE DEVICE AND OPERATION METHOD THEREFOR

Pub. No.:    WO/2018/037870    International Application No.:    PCT/JP2017/028177
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Fri Aug 04 01:59:59 CEST 2017
IPC: C02F 1/42
B01J 39/05
B01J 39/07
B01J 39/20
B01J 41/05
B01J 41/07
B01J 41/14
B01J 47/022
B01J 47/026
B01J 47/04
B01J 49/08
B01J 49/09
B01J 49/53
B01J 49/57
G01N 27/416
Applicants: KURITA WATER INDUSTRIES LTD.
栗田工業株式会社
Inventors: YOKOI Ikunori
横井 生憲
Title: REGENERATIVE ION EXCHANGE DEVICE AND OPERATION METHOD THEREFOR
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.