CN220265287U - Asymmetric flowing electrode capacitance deionization device - Google Patents
Asymmetric flowing electrode capacitance deionization device Download PDFInfo
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- CN220265287U CN220265287U CN202321335757.7U CN202321335757U CN220265287U CN 220265287 U CN220265287 U CN 220265287U CN 202321335757 U CN202321335757 U CN 202321335757U CN 220265287 U CN220265287 U CN 220265287U
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- 238000002242 deionisation method Methods 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 135
- 239000012267 brine Substances 0.000 claims abstract description 84
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 83
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 25
- 238000005341 cation exchange Methods 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 23
- 239000003792 electrolyte Substances 0.000 claims description 16
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- 150000002500 ions Chemical class 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 salt ions Chemical class 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006230 acetylene black Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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)
Abstract
The utility model relates to the field of capacitive deionization, in particular to an asymmetric flow electrode capacitive deionization device. In the utility model, a first flow channel area is arranged on one side of a first flow collecting flow channel plate facing an anion exchange membrane, and a second flow channel area is arranged on one side of a second flow collecting flow channel plate facing a cation exchange membrane; the first current collecting flow channel plate and the second current collecting flow channel plate are respectively provided with an electrode liquid input port and an electrode liquid output port; the first channel region and the second channel region are each composed of a plurality of channel grooves connected between the corresponding electrode liquid input port and electrode liquid output port. In the utility model, the flow passage area is formed by adopting a plurality of flow passage grooves with common starting points and end points, so that the accumulation of electrode liquid in the flow passage area is avoided, the conductivity of brine can be effectively improved, and the utilization rate of the anion exchange membrane and the cation exchange membrane is improved, thereby improving the ion adsorption efficiency.
Description
Technical Field
The utility model relates to the field of capacitive deionization, in particular to an asymmetric flow electrode capacitive deionization device.
Background
Lithium is an important strategic resource substance which is indispensable for modern high-tech products, with the rapid development of lithium battery industry in recent years, the demand of the market for lithium is growing, and the existing lithium ions come from ore type lithium resources mostly, but the ore type lithium resources in China are scarce, and are mostly in liquid form in salt lakes, so that great development of salt lake lithium extraction is required.
Capacitive deionization devices are widely used in brine extraction of lithium. However, most of the existing capacitive deionization devices are fixed electrodes, so that large adsorption capacity cannot be realized, and regeneration can not be realized by in-situ desorption of salt ions from electrode materials. Therefore, a flow electrode type capacitive deionization device is proposed, but the flow channel of the conventional flow electrode type capacitive deionization device is fixed in shape, and is mostly a spiral flow channel or a serpentine flow channel, so that the flow electrode is easily deposited in the flow channel due to long-time operation, and the deionization efficiency is easily affected.
In addition, in the existing flowing electrode type capacitance deionizing device, the anode and cathode are all the same cup of flowing electrode, so that concentration difference exists between the flowing electrode and brine easily, and when adsorption is carried out, anions and cations can be sucked into the flowing electrode simultaneously, so that adsorption components are complex, and purification cost is high.
Disclosure of Invention
In order to solve the defects of the flow channel of the capacitive deionization device in the prior art, the utility model provides an asymmetric flow electrode capacitive deionization device which can reduce the flow channel siltation risk of a flow electrode and improve the ion adsorption efficiency.
The utility model adopts the following technical scheme:
an asymmetric flow electrode capacitance deionization device comprises a first protection plate, a first current collecting flow passage plate, an anion exchange membrane, a brine flow passage plate, a cation exchange membrane, a second current collecting flow passage plate and a second protection plate which are sequentially arranged; a first flow channel area is arranged on one side of the first flow collecting flow channel plate facing the anion exchange membrane, and a second flow channel area is arranged on one side of the second flow collecting flow channel plate facing the cation exchange membrane; the first current collecting flow channel plate and the second current collecting flow channel plate are respectively provided with an electrode liquid input port and an electrode liquid output port; the first channel region and the second channel region are each composed of a plurality of channel grooves connected between the corresponding electrode liquid input port and electrode liquid output port.
Preferably, the line connecting the central point of the electrode liquid input port and the central point of the electrode liquid output port on the first collecting flow channel plate is a first line; the first flow channel region is symmetrical about the first line; the runner grooves in the first runner area are in a broken line shape or arc shape; the second flow channel region is identical in structure to the first flow channel region.
Preferably, a straight line passing through the center point of the first line and perpendicular to the first line is a second straight line, and the first flow channel region is symmetrical about the second straight line.
Preferably, in the first flow channel region, two flow channel grooves symmetrical about the first line section form a hexagonal structure, and the hexagonal structure is symmetrical about the second line.
Preferably, a first sealing gasket is arranged between the first collecting flow channel plate and the anion exchange membrane; a second sealing gasket is arranged between the anion exchange membrane and the brine runner plate; a third sealing gasket is arranged between the brine runner plate and the cation exchange membrane; a fourth sealing gasket is arranged between the cation exchange membrane and the second current collecting flow passage plate.
Preferably, the locking device further comprises a plurality of first locking pieces and second locking pieces; the first retaining member passes through the first protection plate, the first current collecting flow channel plate, the first sealing gasket, the anion exchange membrane, the second sealing gasket, the brine flow channel plate, the third sealing gasket, the cation exchange membrane, the fourth sealing gasket, the second current collecting flow channel plate and the second protection plate in sequence, and the second retaining member is in one-to-one correspondence with the first retaining member and is matched with the first retaining member to lock the first protection plate, the first current collecting flow channel plate, the first sealing gasket, the anion exchange membrane, the second sealing gasket, the brine flow channel plate, the third sealing gasket, the cation exchange membrane, the fourth sealing gasket, the stacked structure formed by the second current collecting flow channel plate and the second protection plate.
Preferably, the cathode flow electrode supply module and the anode flow electrode supply module are further included; the cathode flow electrode supply module is simultaneously connected with the electrode liquid input port and the electrode liquid output port of the first current collecting flow channel plate, and is used for providing cathode electrode liquid, and the cathode flow electrode supply module is matched with the first current collecting flow channel plate to form a cathode electrode liquid flow loop;
the anode flow electrode supply module is simultaneously connected with the electrode liquid input port and the electrode liquid output port of the second current collecting flow channel plate, and is used for providing anode electrode liquid, and the anode flow electrode supply module and the second current collecting flow channel plate are matched to form an anode electrode liquid flow loop.
The cathode electrode liquid adopts lithium manganate slurry, and the anode electrode liquid adopts active carbon slurry; and both the catholyte and the anolyte contain lithium salts.
Preferably, the cathode flowing electrode supply module comprises a cathode electrode liquid container and a cathode pump, the cathode electrode liquid container is respectively connected with an electrode liquid input port and an electrode liquid output port of the first current collecting flow channel plate, and the cathode electrode liquid container and the first current collecting flow channel plate are matched to form a cathode electrode liquid flowing loop; the cathode pump is arranged on the cathode electrode liquid flowing loop;
the anode flowing electrode supply module comprises an anode electrode liquid container and an anode pump, the anode electrode liquid container is respectively connected with an electrode liquid input port and an electrode liquid output port of the second current collecting flow channel plate, and the anode electrode liquid container and the second current collecting flow channel plate are matched to form an anode electrode liquid flowing loop; the anode pump is disposed on the anode electrode liquid flow loop.
Preferably, the electrode liquid input port and the electrode liquid output port of the first collecting flow channel plate are located at one side of the first collecting flow channel plate facing the first protection plate, and the electrode liquid input port and the electrode liquid output port of the first collecting flow channel plate extend out of the first protection plate; the electrode liquid input port and the electrode liquid output port of the second current collecting flow channel plate are positioned on one side of the second current collecting flow channel plate facing the second protection plate, and the electrode liquid input port and the electrode liquid output port of the second current collecting flow channel plate extend out of the second protection plate.
Preferably, the brine runner plate is provided with a brine input port and a brine output port for connecting an external brine container; the brine input port and the brine output port are positioned at two sides of the brine runner plate; the brine container and the brine runner plate form a brine loop, and a brine pump is arranged on the brine loop.
The utility model has the advantages that:
(1) In the utility model, the flow passage area is formed by adopting a plurality of flow passage grooves with common starting points and end points, so that the accumulation of electrode liquid in the flow passage area is avoided, the conductivity of brine can be effectively improved, and the utilization rate of the anion exchange membrane and the cation exchange membrane is improved, thereby improving the ion adsorption efficiency.
(2) In the utility model, the flow passage grooves are mutually independent and do not influence each other, and the integral mobility of the electrode liquid in the flow passage area is not influenced by the independent flow passage groove siltation, so that the integral flow uniformity of the electrode liquid in the flow passage area is ensured. According to the utility model, through the symmetrical arrangement of the runner grooves, the runner grooves are distributed in the runner area in a dispersed manner, so that the spreading area of the electrode liquid on the current collecting runner plate is improved, and the utilization rate of the anion exchange membrane and the cation exchange membrane is improved.
(3) In the utility model, the sealing gasket ensures the tightness of the electrode liquid flowing region and the saline flowing region, is beneficial to ensuring the waterproof performance of the whole structure and avoids the pollution of the electrode liquid by the saline. Simultaneously, the first retaining member and the second retaining member are used for locking the stacked structure formed by the first retaining plate, the first collecting flow passage plate, the anion exchange membrane, the brine flow passage plate, the cation exchange membrane, the second collecting flow passage plate and the second protective plate, so that the disassembly of the stacked structure is facilitated, and the subsequent maintenance and recovery of the deionizing device are facilitated.
(4) In the utility model, the cathode flowing electrode supply module and the anode flowing electrode supply module are arranged, so that the cathode flowing electrode circuit and the anode flowing electrode circuit are mutually independent, thereby being beneficial to the separation configuration of cathode electrode liquid and anode electrode liquid, and being convenient for pertinently realizing the adsorption recovery of anions and cations in brine.
(5) The cathode electrode liquid container and the anode electrode liquid container are positioned outside the stacking structure, so that the electrode liquid in the cathode electrode liquid container and the anode electrode liquid container can be conveniently and real-timely allocated, and the activity of the flowing electrode is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an asymmetric flow electrode capacitive deionization device according to the present utility model.
Fig. 2 is an exploded view of an asymmetric flow electrode capacitive deionization device of the present utility model.
FIG. 3 (a) is a schematic diagram showing the distribution of flow channels used in example 1.
FIG. 3 (b) is a schematic diagram of a serpentine flow channel employed in example 2.
Fig. 4 is a graph comparing conductivity data in example 1 and example 2.
Fig. 5 is a graph showing the comparison of the average salt removal rate of the flow channels in example 1 and example 2.
Fig. 6 is a diagram illustrating the operation of an asymmetric flow electrode capacitive deionization device.
The diagram is: 11. a first protective plate; 12. a second protection plate; 21. a first collecting flow channel plate; 22. a second collecting flow channel plate; 200. a flow channel groove; 31. an anion exchange membrane; 32. a cation exchange membrane; 4. a brine flow channel plate; 51. a first gasket; 52. a second gasket; 53. a third gasket; 54. a fourth gasket; 61. a catholyte reservoir; 62. an anode electrolyte container; 63. a brine container; 71. a cathode pump; 72. an anode pump; 73. a brine pump; 81. a first locking member; 82. a second locking member; 9. a conductive sheet;
a1, an electrode liquid input port; a2, an electrode liquid output port; b1, a saline water input port; b2, a brine output port.
Detailed Description
Referring to fig. 1, 2 and 6, an asymmetric flow electrode capacitive deionization apparatus according to this embodiment comprises a cathode flow electrode supply module, an anode flow electrode supply module, a brine container 63, a brine pump 73, a first locking member 81, a second locking member 82, a first protection plate 11, a first current collecting flow path plate 21, a first gasket 51, an anion exchange membrane 31, a second gasket 52, a brine flow path plate 4, a third gasket 53, a cation exchange membrane 32, a fourth gasket 54, a second current collecting flow path plate 22 and a second protection plate 12.
The first protection plate 11, the first collecting channel plate 21, the first gasket 51, the anion exchange membrane 31, the second gasket 52, the brine channel plate 4, the third gasket 53, the cation exchange membrane 32, the fourth gasket 54, the second collecting channel plate 22, and the second protection plate 12 are sequentially disposed. The first locking member 81 passes through the first protective plate 11, the first collecting channel plate 21, the first gasket 51, the anion exchange membrane 31, the second gasket 52, the brine channel plate 4, the third gasket 53, the cation exchange membrane 32, the fourth gasket 54, the second collecting channel plate 22, and the second protective plate 12 in this order. The second locking members 82 are in one-to-one correspondence with the first locking members 81, and specifically, the first locking members 81 and the second locking members 82 can be in threaded fit, that is, nuts are adopted for the second locking members 82. In this manner, by the cooperation of the second locking member 82 and the first locking member 81, the first protection plate 11, the first collecting channel plate 21, the first gasket 51, the anion exchange membrane 31, the second gasket 52, the brine channel plate 4, the third gasket 53, the cation exchange membrane 32, the fourth gasket 54, the second collecting channel plate 22, and the second protection plate can be stably stacked.
The side of the first collecting flow channel plate 21 facing the anion exchange membrane 31 is provided with a first flow channel region, and the side of the second collecting flow channel plate 22 facing the cation exchange membrane 32 is provided with a second flow channel region; the first collecting flow channel plate 21 and the second collecting flow channel plate 22 are respectively provided with an electrode liquid input port A1 and an electrode liquid output port A2.
The electrode liquid input port A1 and the electrode liquid output port A2 of the first collecting flow channel plate 21 are located at a side of the first collecting flow channel plate 21 facing the first protection plate 11, and the electrode liquid input port A1 and the electrode liquid output port A2 of the first collecting flow channel plate 21 extend out of the first protection plate 11, so that the electrode liquid input port A1 and the electrode liquid output port A2 of the first collecting flow channel plate 21 are connected with the cathode flowing electrode supply module to obtain cathode electrode liquid, and a cathode flowing electrode is formed.
The electrode liquid input port A1 and the electrode liquid output port A2 of the second collecting flow channel plate 22 are located at a side of the second collecting flow channel plate 22 facing the second protection plate 12, and the electrode liquid input port A1 and the electrode liquid output port A2 of the second collecting flow channel plate 22 extend out of the second protection plate 12, so that the electrode liquid input port A1 and the electrode liquid output port A2 of the second collecting flow channel plate 22 are connected with the anode flowing electrode supply module to obtain anode electrode liquid, and an anode flowing electrode is formed.
In the present embodiment, the cathode flow electrode supply module includes a cathode liquid container 61 and a cathode pump 71, the cathode liquid container 61 is connected to the electrode liquid input port A1 and the electrode liquid output port A2 of the first collecting flow channel plate 21, respectively, and the cathode liquid container 61 and the first collecting flow channel plate 21 cooperate to form a cathode liquid flow circuit. The cathode pump 71 may be disposed between the catholyte container 61 and the electrode fluid input port A1 or the electrode fluid output port A2 on the first collecting flow plate 21. The cathode pump 71 is configured to provide motive force such that catholyte circulates in a catholyte flow loop, the dynamic catholyte forming a cathode flow electrode in the first flow region.
The anode flow electrode supply module includes an anode electrolyte container 62 and an anode pump 72, the anode electrolyte container 62 is respectively connected to the electrolyte input port A1 and the electrolyte output port A2 of the second collecting flow channel plate 22, and the anode electrolyte container 62 cooperates with the second collecting flow channel plate 22 to form an anode electrolyte flow circuit. The anode pump 72 may be disposed between the anode electrolyte container 62 and the electrolyte input port A1 or the electrolyte output port A2 on the second collecting runner plate 22. The anode pump 72 is configured to provide motive force to circulate anolyte over the anolyte flow loop, the dynamic anolyte forming an anode flow electrode in the second flow-path region.
In this embodiment, the conductive sheets 9 may be disposed on the first and second collecting flow plates 21 and 22, respectively, to connect an external power source through the conductive sheets 9, so that the cathode electrode liquid in the first flow path region and the anode electrode liquid in the second flow path region are charged, thereby deionizing the brine passing through the brine flow plate 4. In this embodiment, since the catholyte and the anolyte are both in a flowing state, the upper limit of electrode adsorption is greatly increased relative to the fixed electrode. Meanwhile, in the present embodiment, the catholyte container 61 and the anolyte container 62 are located outside the stacked structure, so that the catholyte in the catholyte container 61 and the anolyte container 62 can be conveniently dispensed in real time, thereby ensuring the activity of the flowing electrode.
In this embodiment, the cathode electrode liquid flow circuit and the anode electrode liquid flow circuit are mutually independent, so that an asymmetric electrode structure is realized, and the cathode electrode liquid and the anode electrode liquid are conveniently and pertinently configured according to the brine deionization requirement. For example, in this embodiment, when the deionization device is applied to remove lithium ions, the anode electrode liquid adopts a common activated carbon slurry; the cathode electrode liquid adopts lithium manganate slurry to improve the lithium ion adsorption performance; and both the cathode electrode liquid and the anode electrode liquid contain lithium salt to improve the activity.
In the present embodiment, the brine flow channel plate 4 is provided with a brine input port B1 and a brine output port B2; the brine input port B1 and the brine output port B2 are located on both sides of the brine flow channel plate 4. The brine input port B1 and the brine output port B2 are both connected to a brine container 63, and the brine container 63 and the brine flow channel plate 4 constitute a brine circuit. A brine pump 73 is provided between the brine container 63 and the brine input port B1 or the brine output port B2 so as to drive the flow of brine by the brine pump 73, thereby accomplishing deionization.
The working principle of the asymmetric flow electrode capacitance deionization device in the embodiment is as follows: the first current collecting flow channel plate 21 and the second current collecting flow channel plate 22 are connected with the anode and the cathode of an external power supply through corresponding conductive sheets 9, the first current collecting flow channel plate 21 conducts electricity to the cathode electrode liquid of the first flow channel region, and the second current collecting flow channel plate 22 conducts electricity to the anode electrode liquid of the second flow channel region. The cathode electrode liquid in the first flow channel region and the anode electrode liquid in the second flow channel region are ionized, so that brine ions in the brine flow channel plate 4 are adsorbed; the arrangement of the anion exchange membrane 31 and the cation exchange membrane 32 allows cations in the brine to be adsorbed by the cathode electrode liquid and anions in the brine to be adsorbed by the anode electrode liquid, thereby being beneficial to expanding the adsorption quantity of the flowing electrode and greatly expanding the adsorption capacity and the adsorption rate of the salt ions.
In the present embodiment, each of the first flow channel region and the second flow channel region is composed of a plurality of flow channel grooves 200 connected between the corresponding electrode liquid input port A1 and electrode liquid output port A2.
In this embodiment, the line connecting the center point of the electrode liquid input port A1 and the center point of the electrode liquid output port A2 on the first collecting flow plate 21 is made as a first line; let the straight line passing through the center point of the first line and perpendicular to the first line be the second straight line. The first flow channel region is symmetrical about the first line; and the first flow path region is symmetrical about the second line. The flow channel 200 in the first flow channel region is in the shape of a broken line or an arc. Thus, by the diversion of the flow channel groove 200, the flowing and silting probability of the electrode liquid is reduced, the smoothness and uniformity of the electrode liquid flowing in the first flow channel area are greatly improved, and the deionization efficiency is further improved. Similarly, the second flow channel region is identical in structure to the first flow channel region.
To demonstrate the effect of the first and second flow path regions employed in this embodiment, two asymmetric flow electrode capacitive deionization devices are provided below by examples 1 and 2.
The asymmetric flow electrode capacitive deionization apparatus provided in example 1 and the asymmetric flow electrode capacitive deionization apparatus provided in example 2 are identical in component parts, and each includes a cathode flow electrode supply module, an anode flow electrode supply module, a brine container 63, a brine pump 73, a first locking member 81, a second locking member 82, a first protection plate 11, a first collecting channel plate 21, a first gasket 51, an anion exchange membrane 31, a second gasket 52, a brine channel plate 4, a third gasket 53, a cation exchange membrane 32, a fourth gasket 54, a second collecting channel plate 22, and a second protection plate 12.
Referring to fig. 3 (a), in embodiment 1, two flow channel grooves 200 in the first flow channel region, which are symmetrical about the first line segment, form a hexagonal structure, and the hexagonal structure is symmetrical about the second line. The second flow channel region is identical in structure to the first flow channel region.
Referring to fig. 3 (b), both the first flow channel region and the second flow channel region in embodiment 2 employ serpentine flow channels.
In the embodiment 1 and the embodiment 2, brine is deionized under the same condition, the anode electrode liquid is prepared from an active carbon material, an acetylene black material, lithium salt and deionized water, and the cathode electrode liquid is prepared from a lithium manganate material, an acetylene black material, lithium salt and deionized water.
In this example, the brine in the brine flow field plates 4 of examples 1 and 2 was tested, and brine conductivity data is shown in fig. 4; the brine before and after the treatment was tested to obtain the average salt removal rate of brine as shown in fig. 5.
Therefore, in the embodiment, the adsorption efficiency of the deionization device is greatly improved through the optimization of the flow channel.
The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. An asymmetric flow electrode capacitance deionization device is characterized by comprising a first protection plate (11), a first current collecting flow channel plate (21), an anion exchange membrane (31), a brine flow channel plate (4), a cation exchange membrane (32), a second current collecting flow channel plate (22) and a second protection plate (12) which are sequentially arranged; a first flow channel area is arranged on one side of the first flow collecting channel plate (21) facing the anion exchange membrane (31), and a second flow channel area is arranged on one side of the second flow collecting channel plate (22) facing the cation exchange membrane (32); the first collecting flow channel plate (21) and the second collecting flow channel plate (22) are respectively provided with an electrode liquid input port (A1) and an electrode liquid output port (A2); the first channel region and the second channel region are each composed of a plurality of channel grooves (200) connected between the corresponding electrode liquid input port (A1) and electrode liquid output port (A2).
2. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 1, wherein a line connecting a center point of an electrode liquid input port (A1) and a center point of an electrode liquid output port (A2) on the first collecting flow channel plate (21) is a first line; the first flow channel region is symmetrical about the first line; the runner grooves (200) in the first runner area are in a broken line shape or arc shape; the second flow channel region is identical in structure to the first flow channel region.
3. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 2, wherein a straight line passing through a center point of the first line and perpendicular to the first line is a second straight line, and the first flow path region is symmetrical about the second straight line.
4. A capacitive deionization unit of an asymmetric flow electrode as claimed in claim 3, wherein in the first flow channel region, two flow channel grooves (200) symmetrical about the first line section form a hexagonal structure, and said hexagonal structure is symmetrical about the second line.
5. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 1, wherein a first gasket (51) is provided between the first collecting flow channel plate (21) and the anion exchange membrane (31); a second sealing gasket (52) is arranged between the anion exchange membrane (31) and the brine runner plate (4); a third sealing gasket (53) is arranged between the brine runner plate (4) and the cation exchange membrane (32); a fourth gasket (54) is disposed between the cation exchange membrane (32) and the second collecting flow channel plate (22).
6. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 5, further comprising a plurality of first locking members (81) and second locking members (82); the first locking pieces (81) sequentially penetrate through the first protection plate (11), the first current collecting flow passage plate (21), the first sealing gasket (51), the anion exchange membrane (31), the second sealing gasket (52), the brine flow passage plate (4), the third sealing gasket (53), the cation exchange membrane (32), the fourth sealing gasket (54), the second current collecting flow passage plate (22) and the second protection plate, the second locking pieces (82) are in one-to-one correspondence with the first locking pieces (81) and are matched with the first locking pieces (81) to lock the stacked structure formed by the first protection plate (11), the first current collecting flow passage plate (21), the first sealing gasket (51), the anion exchange membrane (31), the second sealing gasket (52), the brine flow passage plate (4), the third sealing gasket (53), the cation exchange membrane (32), the fourth sealing gasket (54), the second current collecting flow passage plate (22) and the second protection plate.
7. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 1, further comprising a cathode flow electrode supply module and an anode flow electrode supply module; the cathode flow electrode supply module is simultaneously connected with an electrode liquid input port (A1) and an electrode liquid output port (A2) of the first current collecting flow channel plate (21), and is used for providing cathode electrode liquid, and the cathode flow electrode supply module is matched with the first current collecting flow channel plate (21) to form a cathode electrode liquid flow loop;
the anode flow electrode supply module is simultaneously connected with the electrode liquid input port (A1) and the electrode liquid output port (A2) of the second current collecting flow channel plate (22), and is used for providing anode electrode liquid, and the anode flow electrode supply module and the second current collecting flow channel plate (22) are matched to form an anode electrode liquid flow loop.
8. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 7, wherein the cathode flow electrode supply module comprises a cathode electrode liquid container (61) and a cathode pump (71), the cathode electrode liquid container (61) is respectively connected to an electrode liquid input port (A1) and an electrode liquid output port (A2) of the first collecting flow channel plate (21), and the cathode electrode liquid container (61) cooperates with the first collecting flow channel plate (21) to form a cathode electrode liquid flow circuit; a cathode pump (71) is arranged on the cathode electrode liquid flow loop;
the anode flowing electrode supply module comprises an anode electrolyte container (62) and an anode pump (72), the anode electrolyte container (62) is respectively connected with an electrode electrolyte input port (A1) and an electrode electrolyte output port (A2) of the second current collecting flow channel plate (22), and the anode electrolyte container (62) is matched with the second current collecting flow channel plate (22) to form an anode electrolyte flowing loop; an anode pump (72) is disposed on the anode electrode liquid flow loop.
9. The asymmetric-flow electrode capacitive deionization apparatus as claimed in claim 8, wherein the electrode liquid input port (A1) and the electrode liquid output port (A2) of the first collecting flow path plate (21) are located at a side of the first collecting flow path plate (21) facing the first protection plate (11), and the electrode liquid input port (A1) and the electrode liquid output port (A2) of the first collecting flow path plate (21) protrude from the first protection plate (11); the electrode liquid input port (A1) and the electrode liquid output port (A2) of the second current collecting flow channel plate (22) are positioned on one side of the second current collecting flow channel plate (22) facing the second protection plate (12), and the electrode liquid input port (A1) and the electrode liquid output port (A2) of the second current collecting flow channel plate (22) extend out of the second protection plate (12).
10. The asymmetric flow electrode capacitive deionization apparatus as claimed in claim 1, wherein a brine flow channel plate (4) is provided with a brine input port (B1) and a brine output port (B2) for connecting an external brine container (63); the brine input port (B1) and the brine output port (B2) are positioned at two sides of the brine runner plate (4); the brine container (63) and the brine runner plate (4) form a brine loop, and a brine pump (73) is arranged on the brine loop.
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| CN202321335757.7U CN220265287U (en) | 2023-05-29 | 2023-05-29 | Asymmetric flowing electrode capacitance deionization device |
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| CN202321335757.7U CN220265287U (en) | 2023-05-29 | 2023-05-29 | Asymmetric flowing electrode capacitance deionization device |
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