Dual-membrane on-line generator for acid or alkali solution

Patent metadata

Field	Value
Publication number	US-2021230756-A1
Application number	US-201915734689-A
Country	US
Kind code	A1
Filing date	Jun 14, 2019
Priority date	Jul 5, 2018
Publication date	Jul 29, 2021
Grant date	—

Abstract

A dual-membrane on-line generator for an acid or alkali solution is provided, including an upper electrolytic cell body (3), a middle electrolytic cell body (4) and a lower electrolytic cell body (5) which are clamped by an upper fastening steel plate (1) and a lower fastening steel plate (2), an upper regeneration liquid channel (A), a middle eluent channel (B) and a lower regeneration liquid channel (C) being provided on the middle electrolytic cell body (4).

First claim

1 . A dual-membrane on-line generator for an acid or alkali solution, comprising an upper fastening steel plate ( 1 ), a lower fastening steel plate ( 2 ), an upper electrolytic cell body ( 3 ), a middle electrolytic cell body ( 4 ) and a lower electrolytic cell body ( 5 ), wherein the upper electrolytic cell body ( 3 ), the middle electrolytic cell body ( 4 ) and the lower electrolytic cell body ( 5 ) are clamped in sequence by the upper fastening steel plate ( 1 ) and the lower fastening steel plate ( 2 ), and upper and lower corners of the upper fastening steel plate ( 1 ) and the lower fastening steel plate ( 2 ) are fastened with fastening screws ( 11 ); wherein,
an upper regeneration liquid channel (A), a middle eluent channel (B) and a lower regeneration liquid channel (C) are arranged on the middle electrolytic cell body ( 4 ); two openings are provided on both sides of the upper regeneration liquid channel (A), and are respectively used as an upper regeneration liquid channel inlet ( 14 ) and an upper regeneration liquid channel outlet ( 15 ), and openings of the upper regeneration liquid channel inlet ( 14 ) and the upper regeneration liquid channel outlet ( 15 ) are respectively arranged on the upper fastening steel plate ( 1 ), a cathode electrode ( 12 ) is arranged in the upper regeneration liquid channel (A), and the other end of the cathode electrode ( 12 ) is arranged on the upper fastening steel plate ( 1 ); the middle eluent channel (B) is a hollow channel, two openings are provided on both sides of the middle eluent channel (B), and are respectively used as a middle eluent channel inlet ( 16 ) and a middle eluent channel outlet ( 17 ), and openings of the middle eluent channel inlet ( 16 ) and the middle eluent channel outlet ( 17 ) are respectively arranged on both sides of the middle electrolytic cell body ( 4 ); two openings are provided on both sides of in the lower regeneration liquid channel (C), and are respectively used as a lower regeneration liquid channel inlet ( 18 ) and a lower regeneration liquid channel outlet ( 19 ), and openings of the lower regeneration liquid channel inlet ( 18 ) and the lower regeneration liquid channel outlet ( 19 ) are respectively arranged on the lower fastening steel plate ( 2 ), an anode electrode ( 13 ) is arranged in the lower regeneration liquid channel (C), and the other end of the anode electrode ( 13 ) is arranged on the lower fastening steel plate ( 2 ); a porous cathode sheet ( 6 ), a first cation exchange membrane ( 701 ) and a bipolar membrane ( 8 ) are provided between the upper regeneration liquid channel (A) and the middle eluent channel (B); a porous anode sheet ( 10 ) and a second cation exchange membrane ( 702 ) are provided between the middle eluent channel (B) and the lower regeneration liquid channel (C); upstream pure water enters through the middle eluent channel inlet ( 16 ), and flows out from the middle eluent channel outlet ( 17 ) after passing through the middle eluent channel (B); pure alkali regeneration liquid enters through the upper regeneration liquid channel inlet ( 14 ), and flows out from the upper regeneration liquid channel outlet ( 15 ) after passing through the upper regeneration liquid channel (A), and then enters through the lower regeneration liquid channel inlet ( 18 ), flows out from the lower regeneration liquid channel outlet ( 19 ) after passing through the lower regeneration liquid channel (C), and flows back to regeneration liquid.

2 . The dual-membrane on-line generator for an acid or alkali solution according to claim 1 , wherein the middle eluent channel (B) is filled with ion exchange screens ( 9 ) or inert particles with a wide pH working range or monolithic columns or fibers.

3 . The dual-membrane on-line generator for an acid or alkali solution according to claim 1 , wherein multi-layer and overlapping first cation exchange membranes ( 701 ) and bipolar membranes ( 8 ) are provided between the upper regeneration liquid channel (A) and the middle eluent channel (B).

4 . The dual-membrane on-line generator for an acid or alkali solution according to claim 1 , wherein multi-layer and overlapping second cation exchange membranes ( 702 ) are provided between the middle eluent channel (B) and the lower regeneration liquid channel (C).

5 . The dual-membrane on-line generator for an acid or alkali solution according to claim 3 , wherein the first cation exchange membrane ( 701 ), the second cation exchange membrane ( 702 ) and the bipolar membrane are in form of ion exchange plate membranes.

6 . The dual-membrane on-line generator for an acid or alkali solution according to claim 1 , wherein the cathode electrode ( 12 ) and the anode electrode ( 13 ) adopt a porous platinum electrode structure.

7 . A dual-membrane on-line generator for an acid or alkali solution, comprising an upper fastening steel plate ( 1 ), a lower fastening steel plate ( 2 ), an upper electrolytic cell body ( 3 ), a middle electrolytic cell body ( 4 ) and a lower electrolytic cell body ( 5 ), wherein the upper electrolytic cell body ( 3 ), the middle electrolytic cell body ( 4 ) and the lower electrolytic cell body ( 5 ) are clamped in sequence by the upper fastening steel plate ( 1 ) and the lower fastening steel plate ( 2 ), and upper and lower corners of the upper fastening steel plate ( 1 ) and the lower fastening steel plate ( 2 ) are fastened with fastening screws ( 11 ); wherein,
an upper regeneration liquid channel (A), a middle eluent channel (B) and a lower regeneration liquid channel (C) are arranged on the middle electrolytic cell body ( 4 ); two openings are provided on both sides of the upper regeneration liquid channel (A), and are respectively used as an upper regeneration liquid channel inlet ( 14 ) and an upper regeneration liquid channel outlet ( 15 ), and openings of the upper regeneration liquid channel inlet ( 14 ) and the upper regeneration liquid channel outlet ( 15 ) are respectively arranged on the upper fastening steel plate ( 1 ), an anode electrode ( 13 ) is arranged in the upper regeneration liquid channel (A), the anode electrode ( 13 ) adopts a porous platinum electrode structure, and the other end of the anode electrode ( 13 ) is arranged on the upper fastening steel plate ( 1 ); the middle eluent channel (B) is a hollow channel, two openings are provided on both sides of the middle eluent channel (B), and are respectively used as a middle eluent channel inlet ( 16 ) and a middle eluent channel outlet ( 17 ), and openings of the middle eluent channel inlet ( 16 ) and the middle eluent channel outlet ( 17 ) are respectively arranged on both sides of the middle electrolytic cell body ( 4 ); two openings are provided on both sides of in the lower regeneration liquid channel (C), and are respectively used as the lower regeneration liquid channel inlet ( 18 ) and the lower regeneration liquid channel outlet ( 19 ), and openings of the lower regeneration liquid channel inlet ( 18 ) and the lower regeneration liquid channel outlet ( 19 ) are respectively arranged on the lower fastening steel plate ( 2 ), a cathode electrode ( 12 ) is provided in the lower regenerating solution channel (C), the cathode electrode ( 12 ) adopts a porous platinum electrode structure, and the other end is arranged on the lower fastening steel plate ( 2 ); a porous anode sheet ( 10 ), a first anion exchange membrane ( 703 ) and a bipolar membrane ( 8 ) are provided between the upper regeneration liquid channel (A) and the middle eluent channel (B); a porous cathode sheet ( 6 ) and a second anion exchange membrane ( 704 ) are provided between the middle eluent channel (B) and the lower regeneration liquid channel (C); upstream pure water enters through the middle eluent channel inlet ( 16 ), and flows out from the

Assignees

• Univ East China Science & Tech
• Shimadzu China Co Ltd

Inventors

• Yang Bingcheng
• Zhang Feifang
• Lu Yifei
• Zhou Liting
• Huang Shujun

Classifications

• B01D61/465

  comprising the membrane sequence AB or BA, where B is a bipolar membrane · CPC title

• B01D61/466

  comprising the membrane sequence BC or CB · CPC title

• B01D61/445 Primary

  with bipolar membranes; Water splitting · CPC title

• C25B13/02

  characterised by shape or form · CPC title

• C25B11/031

  Porous electrodes · CPC title