Ion-Exchange Apparatus

Patent metadata

Field	Value
Publication number	US-2022347629-A1
Application number	US-202217866489-A
Country	US
Kind code	A1
Filing date	Jul 16, 2022
Priority date	Feb 18, 2020
Publication date	Nov 3, 2022
Grant date	—

Abstract

An ion-exchange apparatus has a raw-water tank 1, a treatment tank 2, an ion exchanger 3 and a voltage applying device E. The raw-water tank 1 contains a to be treated liquid that has impurity ions. The treatment tank 2 contains a treatment material with exchange ions exchangeable with the impurity ions. The ion exchanger 3 enables the passage of the impurity ions from the raw-water tank 1 to the treatment tank 2 and the passage of the exchange ions from the treatment tank 2 to the raw-water tank 1. The voltage-applying device E applies a voltage to the ion exchanger 3.

First claim

What is claimed:

1 . An ion-exchange apparatus comprising:
a raw-water section containing a to be treated liquid, the liquid including a liquid that contains impurity ions; a treatment section containing a treatment material that contains exchange ions including ions exchangeable with the impurity ions; an ion exchanger enabling passage of the impurity ions from the raw-water section to the treatment section and passage of the exchange ions from the treatment section to the raw-water section; the ion-exchange apparatus further comprises: a voltage-applying device for applying a voltage to the ion exchanger, wherein when the impurity ions in the raw-water section are cations, the voltage-applying device applies a voltage such that the ion exchanger serves as a negative electrode, and when the impurity ions in the raw-water section are anions, the voltage-applying device applies a voltage such that the ion exchanger serves as a positive electrode.

2 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger includes an electrode on the ion exchanger, a counter electrode disposed at the raw-water section containing the to be treated liquid, and a voltage is applied using a membrane itself as an electrode.

3 . The ion-exchange apparatus according to claim 1 , wherein the exchange ions include group 1 element ions or hydroxide ions.

4 . The ion-exchange apparatus according to claim 1 , wherein the ion-exchange apparatus includes a first treatment section where the exchange ions include group 1 element ions, and
a second treatment section where the exchange ions are hydroxide ions, wherein each of the first treatment section and the second treatment section is connected to the raw-water section with the ion exchanger provided therebetween, and the voltage-applying device applies a voltage such that the ion exchanger serves as a negative electrode in the first treatment section and such that the ion exchanger serves as a positive electrode in the second treatment section.

5 . The ion-exchange apparatus according to any one of claim 1 , wherein the voltage-applying device is set so that a current is 0.01 A or less when a voltage is applied to the ion exchanger.

6 . The ion-exchange apparatus according to claim 1 , wherein the treatment material in the treatment section has a higher molarity than the to be treated liquid in the raw-water section.

7 . The ion-exchange apparatus according to claim 6 , wherein the treatment material in the treatment section has a molarity of 2 mol/L or more.

8 . The ion-exchange apparatus according to claim 1 , wherein the raw-water section enables flow of the to be treated liquid.

9 . The ion-exchange apparatus according to claim 1 , wherein the treatment section includes a stirrer for stirring the treatment material.

10 . The ion-exchange apparatus according to claim 1 , wherein the raw-water section includes a packed ion exchanger in contact with the ion exchanger that enables passage of the impurity ions from the raw-water section to the treatment section and passage of the exchange ions from the treatment section to the raw-water section.

11 . The ion-exchange apparatus according to claim 10 , wherein the packed ion exchanger in the raw-water section includes ion-exchange fibers.

12 . The ion-exchange apparatus according to claim 1 , wherein a seal seals at least one of a joint portion between the raw-water section and the ion exchanger and a joint portion between the treatment section and the ion exchanger.

13 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger is disposed on a support including a sheet-like fiber layer.

Assignees

• Fcc Kk

Inventors

• Ino Kentaro
• Higuchi Hironori
• Endo Makiko

Classifications

• B01D15/361 Primary

  Ion-exchange · CPC title

• B01D2325/42

  Ion-exchange membranes · CPC title

• C02F1/42

  by ion-exchange (ion-exchange in general B01J) · CPC title

• B01J47/12 Primary

  characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes (electrodialysis or electro-osmosis B01D61/42) · CPC title

• B01J47/00 Primary

  Ion-exchange processes in general; Apparatus therefor (ion-exchange chromatography processes or apparatus B01D15/08) · CPC title