CN2259940Y - Five cell type electrodialysis apparatus for removing salt - Google Patents
Five cell type electrodialysis apparatus for removing salt Download PDFInfo
- Publication number
- CN2259940Y CN2259940Y CN96205793U CN96205793U CN2259940Y CN 2259940 Y CN2259940 Y CN 2259940Y CN 96205793 U CN96205793 U CN 96205793U CN 96205793 U CN96205793 U CN 96205793U CN 2259940 Y CN2259940 Y CN 2259940Y
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- CN
- China
- Prior art keywords
- tank
- groove
- anion
- cation
- anode
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
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- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to an apparatus using electrodialysis to removing salt for water and other products. An anode tank, a cathode tank, a concentrating tank, a cation removing tank and an anion removing tank are arranged in a casing, cation exchanging membrane are arranged between the anode tank and the cation removing tank and between the concentrating tank and the anion removing tank, anion exchanging membranes are arranged between the cathode tank and the anion removing tank and between the concentrating tank and the anion removing tank, and the utility model is provided with an inlet and an outlet. The utility model is used for concentrating and desalting seawater and removing the salt for medicines and biological products without generating chlorine pollution, and the utility model eliminates the ohmic polarizing phenomenon.
Description
The utility model relates to a device for desalting salt water and other products by an electroosmosis method.
Sea water desalination and desalination of medicines and biological products can be carried out by adopting an electroosmosis method, and Wang Sha 22531 (preparation, performance and application of ion exchange membranes, 1986: 241) introduces a device for sea water desalination or desalination of medicines and biological products by adopting the electroosmosis method, wherein the device adopts a three-groove electroosmosis device which comprises a cathode groove, an anode groove and a desalination (or desalination) groove, a cathode and electrolyte are arranged in the cathode groove, an anode and electrolyte are arranged in the anode groove, an anode film is arranged between the cathode groove and the desalination groove, and a cathode film is arranged between the anode groove and the desalination groove. However, when the three-tank type electroosmosis device is used for seawater desalination or desalination of medicines and biological products, the anode tank of the electrolytic tank can generate chlorine gas in the electroosmosis process, thereby causing serious pollution; in addition, as the ion concentration of the desalting cell decreases, severe ohmic polarization is generated.
The utility model aims at providing a five-groove type desalination electroosmosis device that can be used to the concentration and the desalination of sea water and the desalination of medicine, biological product, it can overcome the shortcoming that the anode groove produced chlorine and the desalination groove produced ohmic polarization in the existing electroosmosis device working process.
The utility model discloses there is a casing, is equipped with anode trough, negative pole groove, cation in the casing and gets rid of groove, anion and get rid of groove and concentrated groove, respectively is equipped with the electrode in anode trough and negative pole inslot, and anode trough and negative pole groove all are equipped with the export, and concentrated groove is located between anode trough and the negative pole groove to be equipped with and import and export. The cation removing groove is positioned between the anode groove and the concentration groove, and the anode groove and the cation removing groove and the concentration groove and the cation removing groove are separated by cation exchange membranes. The anion removing groove is positioned between the cathode groove and the concentrating groove, and the cathode groove and the anion removing groove and the concentrating groove and the anion removing groove are separated by anion exchange membranes. The cation removing groove is provided with a water inlet and a water outlet; the anion removing groove is provided with a water outlet and a water inlet connected with the water outlet of the cation removing groove, and the concentration groove is provided with an inlet and an outlet. The cation removing tank is filled with cation exchange resin, and the anion removing tank is filled with anion exchange resin.
When the device works, the electrodes in the anode tank and the cathode tank are communicated with a direct current power supply. Seawater (NaCl solution) enters the cation removal tank from the water inlet of the cation removal tank, flows out from the water outlet of the cation removal tank after the cations are removed, flows into the anion removal tank through the water inlet of the anion removal tank, and flows out from the water outlet of the anion removal tank when the anions are removed in the anion removal tank to become desalinated purified water. Obviously, the opposite direction is also possible.
The utility model can simultaneously desalt and concentrate seawater and adopts the principle thatUnder the combined action of the external direct current electric field and the ion exchange membrane, ions are directionally and selectively transferred. The seawater is first cation-removed in cation-removing tank+Ions, etc.), enters an anion removal tank and then removes anions (Cl)-Ions, etc.), the purified water to be desalinated flows out from the outlet of the anion removal tank. The removed cations and anions are gathered in the concentration tank under the action of the electric field, so that the concentration of the NaCl solution in the concentration tank is continuously improved, and the seawater is concentrated. The seawater desalination and the concentration are simultaneously carried out.
In addition, because the utility model discloses Cl in the electroosmosis process-Ions do not enter the anode tank like a three-tank electroosmosis device, lose electrons and release chlorine; but instead migrates to the concentration tank. Thus, no chlorine gas is generated. Meanwhile, the removal of the anions and the cations in the desalting process is respectively carried out in the anion and cation removing chambers filled with the anion and cation exchange resins, so the ohmic polarization phenomenon is also eliminated.
Similarly, the utility model can also be used for the desalination of medicines and biological products.
Fig. 1 is a structural diagram of the present invention.
The following examples will further illustrate the present invention with reference to the accompanying drawings.
As shown in figure 1, the utility model has a shell made of acid and alkali resistant polymer materials (such as polytetrafluoroethylene, etc.), an anode tank (1) and a cathode tank (2) are arranged at both sides, electrodes (7) and (8) are respectively arranged in the anode tank (1) and the cathode tank (2), and outlets (A) and (B) are respectively arranged. A cation removing tank (9), a concentrating tank (11) and an anion removing tank (10) are sequentially arranged between the anode tank (1) and the cathode tank (2) from left to right, and cation exchange membranes (3) and (4) are respectively arranged between the anode tank (1) and the cation removing tank (9) and between the concentrating tank (11) and the cation removing tank (9); the cathode tank (2) and the anion removing tank (10) and the concentration tank (11) and the anion removing tank (10) are separated by anion exchange membranes (5) and (6). Namely, a cation removing groove (9) is arranged between the sandwich layers of the cation exchange membranes (3) and (4); an anion removing groove (10) is arranged between the interlayer of the anion exchange membranes (5) and (6); a concentration tank (11) is arranged between the cation exchange membrane (4) and the anion exchange membrane (6). The cation removing groove (9) and the anion removing groove (10) are respectively provided with water inlets (91) and (101) and water outlets (92) and (102), and the water outlet (92) is communicated with the water inlet (101) through a pipeline (12). The concentrating tank (11) is provided with inlets and outlets (111), (112).
When in work, the anode tank (1) is filled with an acidic aqueous solution (H)2SO4Solution), an alkaline aqueous solution (NaOH solution) is filled in the cathode tank (2), a cation exchange resin and an anion exchange resin are respectively filled in the cation removal tank and the anion removal tank, and a NaCl solution is filled in the concentration tank. The working process is as follows:
the seawater enters the cation removing groove from the pump through the water inlet of the cation removing groove, and when the power supply is switched on, the following reactions are generated:
anode:
cathode: h of anode groove under electric field+The cation exchange membrane (3) enters a cation removal tank to continuously regenerate the cation exchange resin in the tank into H+And (4) molding. Cations (Na) in seawater (NaCl solution) entering from the water inlet of the cation removal tank+Plasma, etc.) and H in the bath+Type cationic resin exchange: seawater (NaCl solution) is used for removing cations in the cation removing tank, converted into HCl aqueous solution and flows out of a water outlet of the tank, and cation resin in the tank is moved by the anode tank+Regeneration: Na+ions enter the concentration tank through the cation exchange membrane (4) under the action of an electric field.
HCl solution flowing out of the water outlet of the cation removing tank flows into the anion removing tank through the water inlet of the anion removing tank and then flows into the anion removing tank together with OH in the tank-Anion resin of type (v) exchanged and converted to pure water:
Therefore, the desalinated seawater flows out from the water outlet of the anion removing tank, the concentration of the NaCl solution in the concentration tank is continuously improved, the seawater is concentrated, and the seawater desalination and concentration are simultaneously carried out.
Claims (1)
1. The five-groove type desalting electroosmosis device comprises a shell, wherein an anode groove and a cathode groove are arranged in the shell, and an electrode and an outlet are respectively arranged in the anode groove and the cathode groove; the cation removing groove is provided with a water inlet and a water outlet, the anion removing groove is provided with a water outlet and a water inlet connected with the water outlet of the cation removing groove, and the concentration groove is provided with an inlet and an outlet; the cation removing tank is filled with cation exchange resin, and the anion removing tank is filled with anion exchange resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96205793U CN2259940Y (en) | 1996-04-05 | 1996-04-05 | Five cell type electrodialysis apparatus for removing salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96205793U CN2259940Y (en) | 1996-04-05 | 1996-04-05 | Five cell type electrodialysis apparatus for removing salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2259940Y true CN2259940Y (en) | 1997-08-20 |
Family
ID=33890649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96205793U Expired - Fee Related CN2259940Y (en) | 1996-04-05 | 1996-04-05 | Five cell type electrodialysis apparatus for removing salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2259940Y (en) |
-
1996
- 1996-04-05 CN CN96205793U patent/CN2259940Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |