CN106430463B - Electroosmosis water treatment device and method with middle polar plate - Google Patents
Electroosmosis water treatment device and method with middle polar plate Download PDFInfo
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- CN106430463B CN106430463B CN201611191149.8A CN201611191149A CN106430463B CN 106430463 B CN106430463 B CN 106430463B CN 201611191149 A CN201611191149 A CN 201611191149A CN 106430463 B CN106430463 B CN 106430463B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The invention relates to an electroosmosis water treatment device and method with an intermediate electrode, comprising a water inlet 1, a water producing port 2, an alkaline water producing port 3, an acidic water producing port 4, a cathode plate 5, an intermediate electrode plate 6, a cation exchange membrane 7, an anion exchange membrane 8 and an anode plate 9, wherein the cathode plate 5 and the anode plate 9 are arranged at the outermost side and comprise more than one intermediate electrode plate 6 in the middle, a pair of anion-cation exchange membranes are arranged between any two adjacent electrode plates, when the electroosmosis water treatment device works, the intermediate electrode plate 6 gathers different charges on two sides under the action of an electric field, anions and cations can also migrate to opposite electrode plates through the ion exchange membranes under the action of the electric field, and when the anions and the anions touch the opposite electrode plates or the different charges on one side of the intermediate electrode plate 6, electrolytic reaction can occur, so that the ion concentration of produced water is reduced, alkaline water and acidic water are produced, and the water treatment purpose is achieved.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an electroosmosis water treatment device with an intermediate polar plate and an electroosmosis water treatment method.
Background
The Electrodialysis (ED) water treatment technology is a relatively mature technology, and based on ED, the technology is combined with the traditional mixed ion exchange desalination technology (DI) to generate the electronic mixed bed (EDI) desalination technology, so that the desalination efficiency is improved, but the EDI has very strict requirements on the quality of the inlet water, so that the treatment cost is relatively high. Compared with EDI, and further the EDR technology is derived, the membrane separation method uses a direct current electric field as a driving force by utilizing the selective permeability of an ion exchange membrane to anions and cations in the solution. All water treatment technologies associated with electrodialysis eventually produce strong brine, which is a problem.
The invention provides a new electroosmosis water treatment method, namely, on the basis of the traditional EDR, an intermediate electrode is added between each pair of anion-cation exchange membranes, so that the anion-cation areas passing through the anion-cation exchange membranes are separated, and an electrolytic reaction occurs, so that deionized water is generated, alkaline water and acidic water are also formed, and the alkaline water and the acidic water have respective application fields, thereby solving the problem of strong brine treatment.
Disclosure of Invention
Aiming at the problems of strong brine generation in the existing water treatment technology related to electrodialysis, the invention provides a novel water treatment device and method based on EDR, and alkaline water and acidic water are generated to replace the strong brine besides deionized water. The invention achieves the aim through the following technical scheme:
an electroosmosis water treatment device with an intermediate electrode comprises a water inlet 1, a water producing port 2, an alkaline water producing port 3, an acidic water 4 water producing port, a cathode plate 5 and an anode plate 9, wherein the cathode plate 5 and the anode plate 9 are arranged at the outermost side, at least one intermediate polar plate 6 is arranged between the cathode plate 5 and the anode plate 6, a group of cation exchange membranes 7 and a group of anion exchange membranes 8 are arranged between the intermediate polar plate 6 and the cathode plate 5, and a group of cation exchange membranes 7 and a group of anion exchange membranes 8 are also arranged between the intermediate polar plate 6 and the anode plate 9.
The further technical scheme of the invention also comprises the following steps:
a group of cation exchange membranes 7 and a group of anion exchange membranes 8 are arranged between every two adjacent middle polar plates 6.
All cation exchange membranes 7 are located near the cathode plate 5 side and all anion exchange membranes 8 are located near the anode plate 9 side.
An alkaline water channel is formed between the cation exchange membrane 7 and the cathode plate 5,
an acidic water channel is formed between the anion exchange membrane 8 and the anode plate 9, and a water producing channel is formed between the cation exchange membrane 7 and the anion exchange membrane 8.
The alkaline water channel is used for communicating the water inlet 1 with the alkaline water outlet 3, the acidic water channel is used for communicating the water inlet 1 with the acidic water outlet 4, and the water producing channel is used for communicating the water inlet 1 with the water producing outlet 2.
The water inlet 1 is positioned at one side of the electroosmosis water treatment device, and the alkaline water outlet 3, the water outlet 2 and the acidic water outlet 4 are positioned at the other side of the electroosmosis water treatment device.
The cathode plate 5 is connected with the negative electrode of the direct current power supply, and the anode plate 9 is connected with the positive electrode of the direct current power supply.
An electroosmotic water treatment method with an intermediate electrode, comprising the steps of:
water is fed, and water to be treated is led into an electroosmosis water treatment device through a water inlet 1;
splitting, and dividing water to be treated, which is led into an electroosmosis water treatment device, into three strands: one stream flows through the alkaline water channel, one stream flows through the water producing channel, and one stream flows through the acidic water channel;
separating, namely accumulating different charges on two sides of the middle polar plate 6 under the action of an electric field, and generating cathode electrolytic reaction to generate alkaline water when cations in water to be treated move to one side of the cathode plate 5 through the cation exchange membrane 7 or contact one side of the middle polar plate 6 with negative charges; when anions in water to be treated move to one side of the anode plate 9 through the anion exchange membrane 8 or contact one side of the middle plate 6 with positive charges, an anodic electrolytic reaction occurs to generate acidic water; the water between the cation exchange membrane 7 and the anion exchange membrane 8 loses anions and cations to generate deionized water;
and (3) discharging water, wherein the separated alkaline water is discharged from an alkaline water outlet 3 through an alkaline water channel, the acidic water is discharged from an acidic water outlet 4 through an acidic water channel, and the deionized water is discharged from a water outlet 2 through a water outlet channel.
Compared with the prior art, the invention has the beneficial technical effects that: the anions and cations passing through the anion-cation exchange membrane are separated by the separation zone, so that deionized water is generated, the generated alkaline water and acidic water replace strong brine, and the alkaline water and the acidic water have respective application fields, thereby solving the problem of strong brine treatment.
Drawings
FIG. 1 is a schematic diagram of the principle and structure of an electroosmosis chemical reaction water treatment device of the invention;
wherein:
1. water inlet 2, water producing port 3 and alkaline water producing port
4. Acid water outlet 5, cathode plate 6 and middle polar plate
7. Cation exchange membrane 8, anion exchange membrane 9, anode plate
Detailed Description
Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the electroosmosis water treatment device with intermediate electrode of the present invention comprises a water inlet 1, a water producing port 2, an alkaline water producing port 3, an acidic water producing port 4, a cathode plate 5 and an anode plate 9, wherein the cathode plate 5 and the anode plate 9 are arranged at the outermost side, more than one intermediate plate 6 is arranged between the cathode plate and the anode plate, a pair of anion-cation exchange membranes are arranged between any two adjacent electrode plates, all cation exchange membranes 7 are close to one side of the cathode plate 5, all anion exchange membranes 8 are close to one side of the anode plate 9, and thus three water channels, namely channels between the cation exchange membranes 7 and the cathode plate 5, are formed between each pair of electrode plates. The channels between the anion exchange membrane 8 and the anode plate 9. A channel between the cation exchange membrane 7 and the anion exchange membrane 8.
In one embodiment of the present invention, the channel formed between the cation exchange membrane 7 and the cathode plate 5 is an alkaline water channel, the channel formed between the anion exchange membrane 8 and the anode plate 9 is an acidic water channel, and the channel formed between the cation exchange membrane 7 and the anion exchange membrane 8 is a water-producing channel; the alkaline water channel is used for communicating the water inlet 1 with the alkaline water outlet 3, the acidic water channel is used for communicating the water inlet 1 with the acidic water outlet 4, and the water producing channel is used for communicating the water inlet 1 with the water producing outlet 2; the water inlet 1 is positioned at one side of the electroosmosis water treatment device, the alkaline aquatic water outlet 3, the water producing outlet 2 and the acid aquatic water outlet 4 are positioned at the other side of the electroosmosis water treatment device, water to be treated is led in by the water inlet 1, and is led out by the alkaline aquatic water outlet 3, the water producing outlet 2 and the acid aquatic water outlet 4 respectively.
The cathode plate 5 and the anode plate 9 are connected with a direct current power supply, the cathode plate 5 is connected with the cathode of the direct current power supply, the anode plate 9 is connected with the anode of the direct current power supply, a direct current electric field is formed between the cathode plate 5 and the anode plate 9, different charges are accumulated on two side surfaces of all middle electrode plates 6 under the action of the electric field, positive charges are close to one side of the cathode plate 5, negative charges are close to one side of the anode plate 9, when water containing electrolyte passes through all channels simultaneously, cations move to one side of the cathode plate 5 through a cation exchange membrane 7 under the driving of the electric field force, anions move to one side of the anode plate 9 through an anion exchange membrane 8, and when the cations contact the cathode plate 5 or the middle electrode plate 6 with the different charges, a cathode electrolytic reaction occurs to generate alkaline water 3; when the anions contact the anode plate 9 or the side of the intermediate plate 6 with different charges, an anodic electrolytic reaction occurs to generate acidic water 4. The water between the cation exchange membrane 7 and the anion exchange membrane 8 loses anions and cations to generate deionized water. The passage between the cathode plate 5 and the cation exchange membrane 7 thus forms the passage for alkaline water 3, the passage between the anode plate 9 and the anion exchange membrane 8 forms the passage for acidic water 4, and the passage between the cation exchange membrane 7 and the anion exchange membrane 8 forms the water-producing passage.
The electroosmosis water treatment with the intermediate electrode comprises the following steps:
water is fed, and water to be treated is led into an electroosmosis water treatment device through a water inlet 1;
splitting, and dividing water to be treated, which is led into an electroosmosis water treatment device, into three strands: one stream flows through the alkaline water channel, one stream flows through the water producing channel, and one stream flows through the acidic water channel;
separating, namely accumulating different charges on two sides of the middle polar plate 6 under the action of an electric field, and generating cathode electrolytic reaction to generate alkaline water when cations in water to be treated move to one side of the cathode plate 5 through the cation exchange membrane 7 or contact one side of the middle polar plate 6 with negative charges; when anions in water to be treated move to one side of the anode plate 9 through the anion exchange membrane 8 or contact one side of the middle plate 6 with positive charges, an anodic electrolytic reaction occurs to generate acidic water; the water between the cation exchange membrane 7 and the anion exchange membrane 8 loses anions and cations to generate deionized water;
and (3) discharging water, wherein the separated alkaline water is discharged from an alkaline water outlet 3 through an alkaline water channel, the acidic water is discharged from an acidic water outlet 4 through an acidic water channel, and the deionized water is discharged from a water outlet 2 through a water outlet channel.
The invention separates the anion and cation areas passing through the anion and cation exchange membranes by adding the intermediate electrode between each pair of anion and cation exchange membranes, and generates electrolytic reaction, thereby not only generating deionized water, but also forming alkaline water and acidic water which have respective application fields, thereby solving the problem of strong brine treatment and achieving the purpose of water treatment.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The electroosmosis water treatment method with the intermediate electrode is characterized by comprising a water inlet (1), a water producing port (2), an alkaline water producing port (3), an acidic water producing port (4), a cathode plate (5) and an anode plate (9), wherein at least one intermediate polar plate (6) is arranged between the cathode plate (5) and the anode plate (9), a group of cation exchange membranes (7) and a group of anion exchange membranes (8) are arranged between the intermediate polar plate (6) and the cathode plate (5), a group of cation exchange membranes (7) and a group of anion exchange membranes (8) are also arranged between the intermediate polar plate (6) and the anode plate (9), all the cation exchange membranes (7) are close to one side of the cathode plate (5), and all the anion exchange membranes (8) are close to one side of the anode plate (9);
the electroosmosis water treatment method comprises the following steps: water is fed, and water to be treated is led into an electroosmosis water treatment device through a water inlet (1); splitting, and dividing water to be treated, which is led into an electroosmosis water treatment device, into three strands: one stream flows through the alkaline water channel, one stream flows through the water producing channel, and one stream flows through the acidic water channel; separating, wherein the two sides of the middle polar plate (6) gather different charges under the action of an electric field, and when cations in water to be treated move to one side of the cathode plate (5) through the cation exchange membrane (7) or contact one side of the middle polar plate (6) with negative charges, a cathode electrolytic reaction occurs to generate alkaline water; when anions in water to be treated move to one side of the anode plate (9) through the anion exchange membrane (8) or contact one side of the middle plate (6) with positive charges, an anodic electrolytic reaction occurs to generate acidic water; the water between the cation exchange membrane (7) and the anion exchange membrane (8) loses anions and cations to generate deionized water; and (3) discharging water, wherein the separated alkaline water is led out from an alkaline water outlet (3) through an alkaline water channel, the acid water is led out from an acid water outlet (4) through an acid water channel, and the deionized water is led out from a water outlet (2) through a water producing channel.
2. An electroosmotic water treatment process with intermediate electrodes according to claim 1, characterized in that between all adjacent two intermediate plates (6) a set of cation exchange membranes (7) and a set of anion exchange membranes (8) are arranged.
3. An electroosmotic water treatment process with intermediate electrode according to claim 1, characterized in that an alkaline water channel is formed between the cation exchange membrane (7) and the cathode plate (5), an acidic water channel is formed between the anion exchange membrane (8) and the anode plate (9), and a water-producing channel is formed between the cation exchange membrane (7) and the anion exchange membrane (8).
4. An electroosmotic water treatment method with intermediate electrode according to claim 1, characterized in that the alkaline water channel communicates the water inlet (1) with the alkaline water outlet (3), the acidic water channel communicates the water inlet (1) with the acidic water outlet (4), and the water producing channel communicates the water inlet (1) with the water producing outlet (2).
5. A method of electro-osmotic water treatment with intermediate electrode according to claim 1 or 4, characterized in that the water inlet (1) is located on one side of the electro-osmotic water treatment device and the alkaline water outlet (3), the water producing outlet (2) and the acidic water outlet (4) are located on the other side of the electro-osmotic water treatment device.
6. An electroosmotic water treatment process with intermediate electrode according to claim 1, characterized in that the cathode plate (5) is connected to the negative pole of a direct current power supply and the anode plate (9) is connected to the positive pole of the direct current power supply.
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| CN201611191149.8A CN106430463B (en) | 2016-12-21 | 2016-12-21 | Electroosmosis water treatment device and method with middle polar plate |
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| CN201611191149.8A CN106430463B (en) | 2016-12-21 | 2016-12-21 | Electroosmosis water treatment device and method with middle polar plate |
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| CN106430463B true CN106430463B (en) | 2023-07-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110550707A (en) * | 2019-09-06 | 2019-12-10 | 温州捷朴环保科技有限公司 | Electrodialysis water treatment facilities with middle electrode |
| CN114477568B (en) * | 2020-10-23 | 2023-05-12 | 中国石油化工股份有限公司 | Method for recycling bromine-containing wastewater |
| CN112844050B (en) * | 2020-12-31 | 2022-08-30 | 平湖爱之馨环保科技有限公司 | Electrolytic electrodialysis cell |
| CN112827361B (en) * | 2020-12-31 | 2021-09-21 | 平湖爱之馨环保科技有限公司 | Two-chamber three-electrode electrolysis electrodialysis device |
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