Title:
REGENERATIVE ION EXCHANGER AND OPERATING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2019030839
Kind Code:
A
Abstract:
To provide a regenerative ion exchanger and an operating method thereof which can to suppress short-term fluctuation of an impurity concentration in treated water of a secondary pure water system (subsystem) at a latter stage of the regenerative ion exchanger.SOLUTION: A supply pipe 3 for pretreated water W to be subjected to ion exchange treatment is connected to an upper part of a regenerative ion exchange tower 1, and meanwhile a discharge pipe 4 for ion exchange treatment water W1 is connected to a lower part. Then, a NaOH solution supply pipe 5 and a hydrochloric acid (HCl) supply pipe 6, which are regeneration chemical liquids, are connected to the supply pipe 3 and the discharge pipe 4, respectively. Further, a discharge pipe 7 for regenerated wastewater is connected to a side portion of a tower main body 1A. Also, the discharge pipe 4 is provided with a resistivity meter 8 and an evaporation residue meter 9 for measuring a concentration of nonvolatile impurities.SELECTED DRAWING: Figure 1
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Inventors:
ARAI NOBUTOKI
Application Number:
JP2017152781A
Publication Date:
February 28, 2019
Filing Date:
August 07, 2017
Export Citation:
Assignee:
KURITA WATER IND LTD
International Classes:
C02F1/42; B01J39/05; B01J39/07; B01J39/20; B01J41/05; B01J41/07; B01J41/12; B01J41/14; B01J43/00; B01J47/028; B01J47/04; B01J49/08; B01J49/09; B01J49/60; C02F1/20
Attorney, Agent or Firm:
Yuji Hayakawa
Keisuke Murasame
Keisuke Murasame