CN216890232U - Foam electrode capacitance deionization device - Google Patents
Foam electrode capacitance deionization device Download PDFInfo
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- CN216890232U CN216890232U CN202220521969.3U CN202220521969U CN216890232U CN 216890232 U CN216890232 U CN 216890232U CN 202220521969 U CN202220521969 U CN 202220521969U CN 216890232 U CN216890232 U CN 216890232U
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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
- Y02A20/131—Reverse-osmosis
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Abstract
A foam electrode capacitive deionization apparatus comprising: the water flow channel plate is provided with an insulating part, a first conductive part, a first electrode plate, an anion exchange membrane, a water flow channel plate, a cation exchange membrane, a second electrode plate and a second conductive part; the first electrode plate, the anion exchange membrane, the water flow channel plate, the cation exchange membrane and the second electrode plate are all arranged in the insulating part and are arranged in sequence, and the first electrode plate and the second electrode plate are all foam electrodes; the first electrode plate is electrically connected with the first conductive part, and the second electrode plate is electrically connected with the second conductive part. Compared with the existing electrode plate provided with an electrode liquid flow channel, the foam electrode provided by the utility model has the advantages that two-dimensional transmission of electrode liquid in the electrode liquid flow channel is converted into three-dimensional transmission in a foam space of the foam electrode, so that the electric adsorption of the electrode liquid is more sufficient, and the desalting efficiency is greatly improved.
Description
Technical Field
The utility model relates to the field of capacitive deionization, in particular to a capacitive deionization device with foam electrodes.
Background
The seawater occupies 71 percent of the earth surface area, is inexhaustible and is the best water source for obtaining fresh water. However, it is difficult to directly obtain fresh water from seawater due to the high concentration of sea salt, a series of toxic substances and organic substances in seawater. Many seawater desalination technologies exist in the market, such as Reverse Osmosis (RO), multistage flash evaporation (MSF) and Electrodialysis (ED), but these technologies also have many disadvantages, such as reverse osmosis requires water treatment under high pressure, high energy consumption, short equipment life, poor acid and alkali resistance; the multistage flash evaporation technology needs a high-temperature environment, the energy consumption is high, and the water purification speed is low. The capacitive deionization technology is that active adsorption materials are added on the basis of electrodialysis, and salt ions in water are removed by utilizing the electric adsorption effect to achieve the water purification effect. Compared with the method using pure metal as a current collector, the capacitive deionization technology has stronger adsorption force and larger adsorption capacity, and better purification effect, and the technology is completed at normal temperature and normal pressure, does not use special environmental conditions, has simple equipment, low process cost, energy conservation and environmental protection, and has unique advantages. In addition, the capacitive deionization device can resist acid and alkali and corrosion, can be regenerated in situ by connecting the electrode adsorption material reversely through voltage, and is a unique seawater desalination technology.
The existing capacitance deionization technology of the fixed electrode can not achieve large adsorption capacity, and the regeneration can be realized by in-situ desorption of salt ions by electrode materials, so that continuous desalination can not be realized. Therefore, a flow electrode capacitance deionization technology has appeared, in which a fixed electrode adsorption material is changed into a liquid material, electrode liquid using positive and negative electrodes is neutralized outside the device, and salt ions are automatically desalted into an electrolyte. The advantages of this technique are: the quantity of the electrode adsorbing materials is enlarged, and the adsorption capacity and the adsorption rate of salt ions can be greatly enlarged; and secondly, the positive electrode liquid and the negative electrode liquid run out of the device and can be automatically neutralized, so that salt ions are automatically desorbed into electrolyte, do not occupy adsorption sites of the material, and the in-situ regeneration of the electrode is realized.
Capacitive deionization devices have been developed for over thirty years, with active materials evolving from initial carbon aerogels to final carbon-based nanomaterials with gradually optimized properties. Capacitive deionization technology has been developed from the initial brackish water desalination to the seawater desalination level and has achieved the selective extraction of salt ions from water, which is not currently possible with water treatment technology. The carbon-based nano material is generally accepted by an activated carbon material at present, and the activated carbon has the advantages of abundant yield on the earth, simple preparation, low manufacturing cost and universality, and is an industrialized preferred material from the perspective of desalination. The electrode is also the most mature electrode adsorption material of the current flowing electrode capacitance deionization technology.
However, in the current flowing electrode capacitance deionization technology, the contact surface between the electrode liquid and the ion exchange membrane is less, and the desalination efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the defect of low desalination efficiency of the flowing electrode capacitive deionization device in the prior art, the utility model provides a foam electrode capacitive deionization device.
The utility model adopts the following technical scheme:
a foam electrode capacitive deionization device comprising: the water flow channel plate is arranged on the first conductive part;
the first electrode plate, the anion exchange membrane, the water flow channel plate, the cation exchange membrane and the second electrode plate are all arranged in the insulating part and are arranged in sequence, and the first electrode plate and the second electrode plate are both foam electrodes; the first electrode plate is electrically connected with the first conductive part, and the second electrode plate is electrically connected with the second conductive part;
the insulating part is also provided with a first input pipe, a first output pipe, a second input pipe and a second output pipe; the first input pipe, the first electrode plate and the first output pipe are communicated in sequence to form an electrode liquid flow passage, and the second input pipe, the second electrode plate and the second output pipe are communicated in sequence to form another circuit of electrode liquid flow passage.
Preferably, the first electrode plate and the second electrode plate are both foam metal electrodes, and the outer surface of the first electrode plate and the outer surface of the second electrode plate are both sprayed with activated carbon layers.
Preferably, the first electrode plate and the second electrode plate both adopt foam carbon electrodes.
Preferably, the first conductive part covers one surface of the first electrode plate, which faces away from the anion exchange membrane, and the second conductive part covers one surface of the second electrode plate, which faces away from the cation exchange membrane.
Preferably, titanium sheets are used for the first conductive part and the second conductive part.
Preferably, the insulating part includes a case, a first insulating pad and a second insulating pad; the first insulating pad, the first conductive part, the first electrode plate, the anion exchange membrane, the water flow channel plate, the cation exchange membrane, the second electrode plate, the second conductive part and the second insulating pad are sequentially arranged in the shell.
Preferably, the housing comprises a first protective plate and a second protective plate; the first protection plate, the first insulating pad, the first conducting part, the first electrode plate, the anion exchange membrane, the water flow channel plate, the cation exchange membrane, the second electrode plate, the second conducting part, the second insulating pad and the second protection plate are sequentially arranged.
Preferably, the first insulating pad and the second insulating pad are silicone pads.
Preferably, a first frame is arranged between the first conductive part and the anion exchange membrane, and the first electrode plate is filled in the first frame; a second frame body is arranged between the second conductive part and the cation exchange membrane, and the second frame body is filled with the second electrode plate.
The utility model has the advantages that:
(1) according to the utility model, on the basis of the existing flowing electrode capacitance deionization device, the electrode plate provided with the electrode liquid flow channel is replaced by the foam electrode, which is equivalent to the conversion of two-dimensional transmission of the electrode liquid in the electrode liquid flow channel into three-dimensional transmission in a foam space of the foam electrode, so that the electro-adsorption of the electrode liquid is more sufficient, and the desalination efficiency is greatly improved.
(2) In the utility model, the surfaces of the first electrode plate and the second electrode plate are active carbon layers, which can prevent the metal in the electrode plates from being analyzed and protect the electrode plates.
(3) In the utility model, the conductive part is completely attached to the electrode plate, so that the electric conduction area is increased, and the full ionization of electrode liquid in the electrode plate is ensured.
(4) According to the utility model, the first insulating pad and the second insulating pad are arranged, so that the first electrode plate and the second electrode plate are protected, the first electrode plate and the second electrode plate are prevented from being connected with the shell in a hard manner, and the core part formed by the first electrode plate, the anion exchange membrane, the water flow channel plate, the cation exchange membrane and the second electrode plate is further extruded by the elasticity of the insulating pads, so that liquid leakage is prevented.
(5) The shell is provided with a first protection plate and a second protection plate which are oppositely arranged, and the structure regularity and the locking of the capacitance deionization device are facilitated.
(6) The arrangement of the first frame body and the second frame body further ensures the sealing of the electrode plate and reduces the risk of liquid leakage.
(7) The method has the advantages of simple equipment, low process cost, strong ion adsorption capacity, excellent adsorption stability, no secondary environmental pollution and wide development prospect.
Drawings
FIG. 1 is a schematic diagram of a foam electrode capacitive deionization unit;
FIG. 2 is a structural diagram of another foam electrode capacitive deionization unit.
11. A first protective plate; 12. a first insulating pad; 13. a first conductive portion; 14. a first electrode plate; 15. an anion exchange membrane; 16. a first frame body; 17. a first input pipe; 18. a first output pipe;
2. a water flow passage plate; 21. a water inlet pipe; 22. a water outlet pipe;
31. a second protective plate; 32. a second insulating pad; 33. a second conductive portion; 34. a second electrode plate; 35. a cation exchange membrane; 36. a second frame body; 37. a second input pipe; 38. a second output pipe.
Detailed Description
The foam electrode capacitive deionization device provided by the embodiment comprises: insulating part, first conductive part 13, first electrode plate 14, anion exchange membrane 15, water flow channel plate 2, cation exchange membrane 35, second electrode plate 34, and second conductive part 33.
The first electrode plate 14, the anion exchange membrane 15, the water flow channel plate 2, the cation exchange membrane 35 and the second electrode plate 34 are all arranged in the insulating part and are arranged in sequence, and the first electrode plate 14 and the second electrode plate 34 are all foam electrodes. The first electrode plate 14 is electrically connected to the first conductive portion 13, and the second electrode plate 34 is electrically connected to the second conductive portion 33.
The insulating part is also provided with a first input pipe 17, a first output pipe 18, a second input pipe 37 and a second output pipe 38. The first input pipe 17 is used for inputting electrode liquid into the first electrode plate 14, the first output pipe 18 is used for outputting the electrode liquid in the first electrode plate 14, the second input pipe 37 is used for inputting the electrode liquid into the second electrode plate 34, and the second output pipe 38 is used for outputting the electrode liquid in the second electrode plate 34.
Compared with the conventional flow electrode, the foam electrode is directly adopted in the embodiment to replace the electrode structure provided with the electrode liquid flow channel. The electrode liquid flows more comprehensively in the foam electrode, so that the flow paths of the electrode liquid in the first electrode plate 14 and the second electrode plate 34 are more disordered and uniform and the cross section of the foam electrode is fully paved, the contact area of the electrode liquid and the anion/cation exchange membrane is the largest, the ion adsorption capacity of the anion/cation exchange membrane on the solution passing through the water flow channel plate 2 is improved, and the desalting effect and the utilization efficiency of the anion/cation exchange membrane are improved.
In this embodiment, the first electrode plate 14 and the second electrode plate 34 may be foam carbon electrodes, or foam metal electrodes, such as foam iron nickel electrodes, whose outer surfaces are coated with activated carbon layers. The active carbon layer is coated on the surface of the foam metal area, so that metal ions can be prevented from being separated out, and the performance of the electrode is protected.
In the present embodiment, first electrode plate 14 is connected to the positive power supply via first conductive portion 13, and second electrode plate 34 is connected to the negative power supply via second conductive portion 33.
In particular embodiments, first conductive portion 13 may be implemented as a wire connecting first electrode plate 14, and second conductive portion 33 may be implemented as a wire connecting second electrode plate 34. In this embodiment, the first conductive part 13 covers a surface of the first electrode plate 14 away from the anion exchange membrane 15, that is, the first conductive part 13 is completely attached to the first electrode plate 14, and a contact surface between the first conductive part 13 and the first electrode plate 14 is equal to a cross section of the foam electrode, so as to ensure sufficient ionization of the electrode solution in the first electrode plate 14. Similarly, the second conductive part 33 covers a surface of the second electrode plate 34 facing away from the cation exchange membrane 35.
In the present embodiment, the insulating portion includes a housing, a first insulating pad 12, and a second insulating pad 32. First insulating pad 12, first electrically conductive portion 13, first electrode board 14, anion exchange membrane 15, water runner plate 2, cation exchange membrane 35, second electrode board 34, second electrically conductive portion 33 and second insulating pad 32 all set up in the shell, and first insulating pad 12 is located one side that first electrode board 14 deviates from anion exchange membrane 15, and second insulating pad 32 is located one side that second electrode board 34 deviates from cation exchange membrane 35.
Specifically, the housing includes a first protection plate 11 and a second protection plate 31. The first protection plate 11, the first insulation pad 12, the first conductive part 13, the first electrode plate 14, the anion exchange membrane 15, the water flow passage plate 2, the cation exchange membrane 35, the second electrode plate 34, the second conductive part 33, the second insulation pad 32, and the second protection plate 31 are sequentially disposed. Thus, the first protection plate 11 and the second protection plate 31 clamp the first insulation pad 12, the first conductive part 13, the first electrode plate 14, the anion exchange membrane 15, the water flow channel plate 2, the cation exchange membrane 35, the second electrode plate 34, the second conductive part 33 and the second insulation pad 32, and the overall structure can be fixed by the locking piece which sequentially penetrates through the first protection plate 11, the first insulation pad 12, the first conductive part 13, the first electrode plate 14, the anion exchange membrane 15, the water flow channel plate 2, the cation exchange membrane 35, the second electrode plate 34, the second conductive part 33, the second insulation pad 32 and the second protection plate 31, so that the structural stability of the foam electrode capacitor deionization device is ensured. The first insulating pad 12 and the second insulating pad 32 are arranged to protect the first electrode plate 14 and the second electrode plate 34, and prevent the first electrode plate 14 and the second electrode plate 34 from being hard-connected to the housing. First insulating pad 12 and second insulating pad 32 all adopt the silica gel pad, are favorable to further extruding the core part that first electrode board 14, anion exchange membrane 15, rivers runner plate 2, cation exchange membrane 35 and second electrode board 34 constitute through the elasticity of insulating pad, prevent the weeping.
In the present embodiment, a first frame 16 is provided between the first conductive section 13 and the anion exchange membrane 15, and the first electrode plate 14 is filled in the first frame 16. Thus, the first frame 16 surrounds the first electrode plate 14, and the first frame 16 seals the first electrode plate 14 together with the first conductive part 13 and the anion exchange membrane 15, thereby preventing the first electrode plate 14 using the foam electrode from leaking. Similarly, a second frame 36 is provided between the second conductive part 33 and the cation exchange membrane 35, and the second electrode plate 34 is filled in the second frame 36.
In this embodiment, the first conductive part 13 and the second conductive part 33 may be made of titanium sheets or graphite plates, and in this case, the first conductive part 13 and the anion exchange membrane 15 are sealed to the first frame 16 and the second conductive part 33 and the cation exchange membrane 35 are sealed to the second frame 36 by pressing of the entire structure, thereby preventing leakage of the first electrode plate 14 and the second electrode plate 34.
In the present embodiment, the first input tube 17 and the first output tube 18 are connected to the first electrode plate 14 through the first protective plate 11, the first insulating pad 12, and the first conductive portion 13 in this order, and the second input tube 37 and the second output tube 38 are connected to the second electrode plate 34 through the second protective plate 31, the second insulating pad 32, and the second conductive portion 33 in this order.
The utility model is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. A foam electrode capacitive deionization device comprising: an insulating part, a first conductive part (13), a first electrode plate (14), an anion exchange membrane (15), a water flow channel plate (2), a cation exchange membrane (35), a second electrode plate (34), and a second conductive part (33);
the first electrode plate (14), the anion exchange membrane (15), the water flow channel plate (2), the cation exchange membrane (35) and the second electrode plate (34) are all arranged in the insulating part and are sequentially arranged, and the first electrode plate (14) and the second electrode plate (34) are both foam electrodes; the first electrode plate (14) is electrically connected with the first conductive part (13), and the second electrode plate (34) is electrically connected with the second conductive part (33);
the insulating part is also provided with a first input pipe (17), a first output pipe (18), a second input pipe (37) and a second output pipe (38); the first input pipe (17), the first electrode plate (14) and the first output pipe (18) are communicated in sequence to form an electrode liquid flow passage, and the second input pipe (37), the second electrode plate (34) and the second output pipe (38) are communicated in sequence to form another circuit of electrode liquid flow passage.
2. The foam electrode capacitive deionization device according to claim 1, wherein the first electrode plate (14) and the second electrode plate (34) are both made of foam metal electrodes, and the outer surface of the first electrode plate (14) and the outer surface of the second electrode plate (34) are both coated with activated carbon layers.
3. The foam electrode capacitive deionization unit as claimed in claim 1, wherein the first electrode plate (14) and the second electrode plate (34) are both carbon foam electrodes.
4. The foam electrode capacitive deionization unit according to claim 1, wherein the first conductive section (13) covers the side of the first electrode plate (14) facing away from the anion exchange membrane (15), and the second conductive section (33) covers the side of the second electrode plate (34) facing away from the cation exchange membrane (35).
5. The foam electrode capacitive deionization unit of claim 4 wherein the first electrically conductive portion (13) and the second electrically conductive portion (33) are each made of titanium sheet.
6. The foam electrode capacitive deionization unit as claimed in claim 4, wherein the insulation part comprises a housing, a first insulation pad (12) and a second insulation pad (32); a first insulating pad (12), a first conductive part (13), a first electrode plate (14), an anion exchange membrane (15), a water flow channel plate (2), a cation exchange membrane (35), a second electrode plate (34), a second conductive part (33), and a second insulating pad (32) are sequentially arranged in the housing.
7. The foam electrode capacitive deionization unit as claimed in claim 6, wherein the housing comprises a first protective plate (11) and a second protective plate (31); a first protection plate (11), a first insulation pad (12), a first conductive part (13), a first electrode plate (14), an anion exchange membrane (15), a water flow passage plate (2), a cation exchange membrane (35), a second electrode plate (34), a second conductive part (33), a second insulation pad (32) and a second protection plate (31) are sequentially arranged.
8. The foam electrode capacitive deionization device as claimed in claim 6, wherein the first insulating pad (12) and the second insulating pad (32) are silicone pads.
9. The capacitive deionization apparatus as claimed in claim 4, wherein a first frame (16) is provided between the first electrically conductive part (13) and the anion exchange membrane (15), and the first electrode plate (14) is filled in the first frame (16); a second frame (36) is provided between the second conductive section (33) and the cation exchange membrane (35), and the second electrode plate (34) is filled in the second frame (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220521969.3U CN216890232U (en) | 2022-03-11 | 2022-03-11 | Foam electrode capacitance deionization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220521969.3U CN216890232U (en) | 2022-03-11 | 2022-03-11 | Foam electrode capacitance deionization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216890232U true CN216890232U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220521969.3U Active CN216890232U (en) | 2022-03-11 | 2022-03-11 | Foam electrode capacitance deionization device |
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| CN (1) | CN216890232U (en) |
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- 2022-03-11 CN CN202220521969.3U patent/CN216890232U/en active Active
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