CN216856312U - Circulation capacitor module and water treatment system with same - Google Patents
Circulation capacitor module and water treatment system with same Download PDFInfo
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- CN216856312U CN216856312U CN202121997603.5U CN202121997603U CN216856312U CN 216856312 U CN216856312 U CN 216856312U CN 202121997603 U CN202121997603 U CN 202121997603U CN 216856312 U CN216856312 U CN 216856312U
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Abstract
A flow-through capacitor module and a water treatment system having the same, comprising: a water flow channel plate, a cation treatment part and an anion treatment part; the cation treatment part comprises a first electrode plate and a cation exchange membrane, and the anion treatment part comprises a second electrode plate and an anion exchange membrane; the cation exchange membrane and the anion exchange membrane are positioned on two sides of the water flow channel plate; a first plane spiral flow channel is arranged on one side of the first electrode plate facing the cation exchange membrane; one side of the second electrode plate facing the anion exchange membrane is provided with a second plane spiral flow channel. In the utility model, the electrode plate adopts the plane spiral flow channel, so that the electrode liquid flows stably in the plane spiral flow channel, and the blocking condition possibly generated in the flow channel with sharp turns such as a snake shape and the like is avoided, thereby ensuring the flowing reliability of the electrode liquid on the first electrode plate and the second electrode plate, ensuring the reliability of the flowing electrodes, namely ensuring the stability of the electric field of the electrode liquid, and ensuring the treatment efficiency of the make-up water in the water treatment cavity.
Description
Technical Field
The utility model relates to the field of water treatment equipment, in particular to a circulating capacitor module and a water treatment system with the same.
Background
The capacitive deionization technology is to completely adsorb salt ions in water by utilizing the electric adsorption capacity of a super capacitor so as to obtain fresh water resources. For other technologies that exist in the market, the electric capacity deionization technology utilizes the electric energy, and this kind of energy that can high-efficiently utilize is not only friendly to the environment as the driving energy, can not produce the pollution, and energy utilization is high moreover, and electric energy can be retrieved even to reasonable device structure, accomplishes energy-concerving and environment-protective effect. In addition, compared with reverse osmosis, multistage flash evaporation and multistage distillation technologies, the capacitive deionization technology does not need chemical substances to clean the electrodes, and the electrodes are reversely connected, so that salt ions adsorbed on the surfaces can be desorbed, the regeneration of the electrodes is realized, and secondary pollution is avoided. In terms of energy consumption, compared with the high-pressure environment of the reverse osmosis technology and the high-temperature environment of the multi-stage flash evaporation and multi-stage distillation technology, the capacitive deionization technology can desalt the make-up water in the normal-temperature and normal-pressure environment, and the energy consumption is low. When aquatic products with the same volume and the same water quality are produced, the energy consumption of the capacitive deionization technology is only one third of that of the reverse osmosis technology. In addition, another outstanding advantage of the capacitive deionization technology is that target ions can be selectively adsorbed to purify substances in the solution, valuable elements can be extracted from waste water or the solution containing radioactive elements, and not only fresh water but also aquatic products with additional values can be produced.
Capacitive deionization technology has been known for three decades, the first capacitive deionization technology uses carbon aerogel material as ion adsorption material. Later, with the development of technology, the technology gradually evolved into carbon cloth, and finally into carbon-based materials. With the emergence of new electrode materials, more and more electrodes are made into adsorption electrodes by adopting a conductive agent, a binder and an active material according to a certain proportion. The principle of the capacitive deionization technology is that an electric field perpendicular to the direction of an electrode is formed under the condition that the electrode material is electrified, and under the action of the electric field, anions migrate towards an anode and cations migrate towards a cathode of charged ions in supply water, and finally fall onto the electrode to be adsorbed by a nano material. Furthermore, and electrodes
Compared with a capacitive deionization device, the initial capacitive deionization device is a fixed electrode, but because the adsorption capacity of the fixed electrode is limited, and the electrode needs to be regenerated in situ, continuous desalination cannot be achieved, and a flow electrode capacitive deionization technology is developed. The flow electrode capacitive deionization technology is to change a fixed electrode into a flow electrode. Compared with the in-situ desorption of a fixed electrode, the flowing electrode is neutralized outside the device to enable salt ions to be desorbed from the adsorption part automatically, and therefore the pseudo-infinite adsorption capacity is achieved.
And for the flow electrode capacitance deionization device, the influence of the device structure and process parameters on the desalting performance of the device is very important. The traditional flow electrode capacitance deionization device adopts a stacked structure and consists of a snakelike flow channel electrode plate, an ion exchange membrane and a water flow channel plate. The make-up water flows in from the through hole on one side of the electrode plate until flowing into the water flow passage plate, and then flows out from the through hole on the other side of the electrode plate. Due to poor sealing performance of the stacks, gaps exist among the assemblies, and in addition, the water flow needs to pass through each assembly, the problems of streaming and liquid leakage are easily caused, and the desalting stability of the device is affected. In addition, the electrode liquid runner of electrode plate is snakelike runner, and snakelike runner is less at corner radius, and electrode liquid reduces at this position velocity of flow, and the absorbent material in the electrode liquid is here the siltation easily appears, influences absorption efficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve the defect that electrode liquid in a capacitive deionization device of a flowing motor in the prior art is easy to block, the utility model provides a circulating capacitor module and a water treatment system with the circulating capacitor module.
One of the objectives of the present invention is to provide a circulating capacitor module, which can make the flow of electrode liquid more stable and avoid the blockage.
A flow-through capacitor module comprising: a water flow channel plate, a cation treatment part and an anion treatment part; the cation treatment part comprises a first electrode plate and a cation exchange membrane, and the anion treatment part comprises a second electrode plate and an anion exchange membrane; the cation exchange membrane and the anion exchange membrane are positioned on two sides of the water flow channel plate and are matched with each other to form a water treatment cavity; the water flow channel plate is provided with a water inlet end and a water outlet end which are both communicated with the water treatment cavity;
the first electrode plate is positioned on one side of the cation exchange membrane, which is far away from the water treatment cavity, a first plane spiral flow channel is arranged on one side of the first electrode plate, which faces the cation exchange membrane, and the two ends of the first plane spiral flow channel are respectively used as an electrode solution inlet and an electrode solution outlet of the first electrode plate;
the second electrode plate is positioned on one side of the anion exchange membrane, which is away from the water treatment cavity, a second planar spiral flow channel is arranged on one side of the second electrode plate, which faces the anion exchange membrane, and the two ends of the second planar spiral flow channel are respectively used as an electrode liquid inlet and an electrode liquid outlet of the second electrode plate;
the first electrode plate is connected with a first wiring terminal, and the second electrode plate is connected with a second wiring terminal.
Preferably, a first step groove and a second step groove are respectively arranged on two sides of the water flow channel plate, and the first step groove is communicated with the second step groove; the first electrode plate and the cation exchange membrane are arranged in the first stepped groove, and the second electrode plate and the anion exchange membrane are arranged in the second stepped groove.
Preferably, the cation treatment section further comprises a first protective plate, and the anion treatment section further comprises a second protective plate; the first protection plate is positioned on one side of the first electrode plate, which is far away from the cation exchange membrane, and the second protection plate is positioned on one side of the second electrode plate, which is far away from the anion exchange membrane.
Preferably, the first protection plate is disposed in the first stepped groove, and the second protection plate is disposed in the second stepped groove.
Preferably, the first protection plate is provided with a first liquid inlet terminal connected with an electrode liquid inlet of the first electrode plate and a first liquid outlet terminal connected with an electrode liquid outlet of the first electrode plate; and the second liquid inlet terminal connected with the electrode liquid inlet of the second electrode plate and the second liquid outlet terminal connected with the electrode liquid outlet of the second electrode plate are arranged on the second protective plate.
Preferably, the first connecting terminal is arranged on the first protection plate and electrically connected with the first electrode plate, the first connecting terminal, the first liquid inlet terminal and the first liquid outlet terminal are all located on one side of the first protection plate, which is far away from the cation exchange membrane, the second connecting terminal is arranged on the second protection plate and electrically connected with the second electrode plate, and the second connecting terminal, the second liquid inlet terminal and the second liquid outlet terminal are all located on one side of the second protection plate, which is far away from the anion exchange membrane.
Preferably, a first sealing elastic cushion and a second sealing elastic cushion are respectively arranged on two sides of the cation exchange membrane, and a third sealing elastic cushion and a fourth sealing elastic cushion are respectively arranged on two sides of the anion exchange membrane; the first sealing elastic cushion and the second sealing elastic cushion are respectively provided with a through hole surrounding the first plane spiral flow channel, and the third sealing elastic cushion and the fourth sealing elastic cushion are respectively provided with a through hole surrounding the second plane spiral flow channel; the cation exchange membrane and the anion exchange membrane are arranged in parallel, the water flow channel plate is provided with a through hole for connecting the first step groove and the second step groove, and the area surrounded by the through hole on the water flow channel plate covers the first plane spiral flow channel and the second plane spiral flow channel.
Preferably, the ion exchange membrane further comprises a plurality of threaded fasteners, and the plurality of threaded fasteners sequentially penetrate through the first protective plate, the first electrode plate, the first sealing elastic pad, the cation exchange membrane, the second sealing elastic pad, the water flow channel plate, the third sealing elastic pad, the anion exchange membrane, the fourth sealing elastic pad, the second electrode plate and the second protective plate.
The utility model also provides a capacitance deionized water processing system.
A capacitance deionized water treatment system comprises the circulation capacitor module, an electrode liquid storage and a water supplementing storage; the electrode liquid storage device is respectively communicated with two ends of the first planar spiral flow passage to form a first electrode liquid circulation loop, the electrode liquid storage device is also respectively communicated with two ends of the second planar spiral flow passage to form a second electrode liquid circulation loop, and the first electrode liquid circulation loop and the second electrode liquid circulation loop are respectively provided with an electrode liquid circulation pump; the make-up water storage device is respectively connected with the water inlet end and the water outlet end, the make-up water storage device and the water treatment cavity form a water circulation loop, and a water pump is arranged on the water circulation loop.
Preferably, a 2.4V power supply is connected between the first electrode terminal and the second electrode terminal, and the electrode solution is 12.5 wt% of activated carbon electrode solution.
The utility model has the advantages that:
(1) in the utility model, salt ions in the replenishing water are driven to permeate through the ion exchange membrane through the electric adsorption effect of the flow electrode and are adsorbed in the flow electrode, so that pure fresh water is obtained. Then, under the condition of applying reverse voltage or short circuit, the negative ions and the positive ions are automatically neutralized and desorbed from the surface of the adsorption electrode into water, so that the electrode regeneration is realized. In the utility model, the electrode plate adopts the plane spiral flow channel, so that the electrode liquid flows stably in the plane spiral flow channel, and the blocking condition possibly generated in the flow channel with sharp turns such as a snake shape and the like is avoided, thereby ensuring the flowing reliability of the electrode liquid on the first electrode plate and the second electrode plate, ensuring the reliability of the flowing electrodes, namely ensuring the stability of the electric field of the electrode liquid, and ensuring the treatment efficiency of the make-up water in the water treatment cavity.
(2) Through the arrangement of the first step groove and the second step groove, the edge-covering protection of the water flow channel plate on the first electrode plate, the cation exchange membrane, the second electrode plate and the anion exchange membrane is realized, the structural stability of the whole circulation capacitor module is improved, the work safety of the cation treatment part and the anion treatment part is favorably ensured, and the stability of an electric field where electrode liquid is positioned is ensured under the working state.
(3) The first protection plate is arranged in the first step groove, the second protection plate is arranged in the second step groove, the stability of the relative positions of the first protection plate and the second protection plate and the water flow channel plate is further improved, the first electrode plate and the cation exchange membrane are tightly pressed through the first protection plate, the second electrode plate and the anion exchange membrane are tightly pressed through the second protection plate, and therefore the stability and the sealing performance of the whole circulation capacitor module are further guaranteed.
(4) First binding post, first feed liquor terminal and first play liquid terminal concentrate on the same one side of first protection shield, and second binding post, second feed liquor terminal and second play liquid terminal concentrate on the same one side of second protection shield, have improved the symmetry and the stability of whole circulation capacitor module appearance structure.
(5) The arrangement of the sealing elastic cushion avoids hard connection damage and realizes the sealing isolation of the make-up water and the electrode liquid. The first sealing elastic cushion and the second sealing elastic cushion are both provided with through holes surrounding the first plane spiral flow passage. Therefore, the electrode liquid flowing through the first plane spiral flow channel directly contacts the cation exchange membrane, the electric field intensity of the cation exchange membrane is improved, and the desorption efficiency of the electrode liquid is improved.
(6) Fastening connection is carried out to first protection board, first plate electrode, first sealed cushion, cation exchange membrane, the sealed cushion of second, rivers passageway board, the sealed cushion of third, anion exchange membrane, the sealed cushion of fourth, second plate electrode and second protection shield through bolt and nut to guarantee the stability of structure.
(7) The capacitor deionized water treatment system provided by the utility model adopts the circulating capacitor module of the spiral flow channel type electrode plate, has excellent salt ion adsorption performance, and the electrode liquid flows more stably in the spiral flow channel, so that the desalting effect is greatly exerted. In addition, the wrapping structure can stably carry out the desalination process of the make-up water, and the problem of any liquid leakage and streaming cannot occur under the long-time operation condition.
(8) The device and the system have the advantages of simple equipment, easy operation, excellent performance, low process cost and wide development prospect.
Drawings
FIG. 1 is a block diagram of a flow-through capacitor module;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic flow-through diagram of a single flow-through capacitor module in a water treatment system;
FIG. 4(a) is a schematic view of a planar spiral flow channel according to the present invention;
FIG. 4(b) is a schematic diagram of a serpentine channel in the prior art;
FIG. 5(a) is a graph showing the comparison between the salt ion concentration of the examples and the comparative examples;
FIG. 5(b) is a graph showing the comparison of the average salt removal rates of the examples and the control;
FIG. 6(a) is a graph showing the comparison between the change in the salt ion concentration and the change in the current at different voltages for the examples;
FIG. 6(b) is a graph showing the comparison of salt ion adsorption performance of examples at different voltages;
FIG. 7(a) is a schematic diagram comparing the change of the salt ion concentration and the change of the current under different activated carbon concentrations in the electrode solution of the embodiment;
FIG. 7(b) is a graph showing the comparison of salt ion adsorption performance of the electrode solutions of the examples with different activated carbon concentrations;
FIG. 8 is a schematic diagram of the conductivity and current changes during a test of long term stable operation of a flow through capacitor module;
fig. 9 is a flow-through capacitor module adsorption test chart.
1. A water flow passage plate; 11. a water inlet end; 12. a water outlet end; 13. a first step groove;
2. a cation treatment unit; 21. a first electrode plate; 22. a cation exchange membrane; 23. a first protective plate; 231. A first liquid inlet terminal; 232. a first liquid outlet terminal; 24. a first sealing elastomeric pad; 25. a second sealing elastomeric pad;
3. an anion treatment unit; 31. a second electrode plate; 32. an anion exchange membrane; 33. a second protective plate; 331. A second liquid inlet terminal; 332. a second liquid outlet terminal; 34. a third sealing elastomeric pad; 35. a fourth sealing elastomeric pad;
4. a threaded fastener; 5. an electrode fluid reservoir; 6. make up water storage;
c: detecting the concentration of salt ions in the make-up water;
C0: the initial value of the concentration of salt ions in the make-up water;
Detailed Description
Referring to fig. 1 to 3, the present embodiment provides a flow-through capacitor module including: a water flow channel plate 1, a cation treatment part and an anion treatment part. The cation treatment section includes a first electrode plate 21 and a cation exchange membrane 22, and the anion treatment section includes a second electrode plate 31 and an anion exchange membrane 32. Graphite plates are used for the first electrode plate 21 and the second electrode plate 31. The cation exchange membrane 22 and the anion exchange membrane 32 are positioned at two sides of the water flow channel plate 1 and are mutually matched to form a water treatment cavity; the water flow channel plate 1 is provided with a water inlet end 11 and a water outlet end 12 which are both communicated with the water treatment cavity.
The first electrode plate 21 is located on one side of the cation exchange membrane 22 departing from the water treatment cavity, one side of the first electrode plate 21 facing the cation exchange membrane 22 is provided with a first plane spiral flow channel, the plane where the first plane spiral flow channel is located is parallel to the cation exchange membrane 22, and the two ends of the first plane spiral flow channel are respectively used as an electrode liquid inlet and an electrode liquid outlet of the first electrode plate 21.
The second electrode plate 31 is located on one side of the anion exchange membrane 32 departing from the water treatment chamber, one side of the second electrode plate 31 facing the anion exchange membrane 32 is provided with a second planar spiral flow channel, the plane where the second planar spiral flow channel is located is parallel to the anion exchange membrane 32, and two ends of the second planar spiral flow channel are respectively used as an electrode solution inlet and an electrode solution outlet of the second electrode plate 31.
So, when first electrode board 21 connects the power negative pole, second electrode board 31 connects the power positive pole, then the electrode solution carries out the ion adsorption to the make-up water in the water treatment cavity under the effect of forward electric field, the positive ion in the make-up water in the water treatment cavity passes through cation exchange membrane 22 and enters into the electrode solution, the anion in the make-up water in the water treatment cavity passes through anion exchange membrane 32 and enters into the electrode solution, promptly, the electrode solution adsorbs the salt ion in the make-up water, realizes desalination to the make-up water to obtain clean fresh water. On the contrary, when the first electrode plate 21 is connected to the positive electrode of the power supply and the second electrode plate 31 is connected to the negative electrode of the power supply, cations in the electrode liquid enter the supply water in the water treatment chamber through the cation exchange membrane 22, and anions in the electrode liquid enter the supply water in the water treatment chamber through the anion exchange membrane 32, so that the ions in the electrode liquid are desorbed under the action of the reverse electric field, and the electrode liquid is self-cleaned for recycling.
In this embodiment, the first planar spiral flow channel and the second planar spiral flow channel are arranged, so that the electrode liquid flows stably in the planar spiral flow channel, and the blocking condition that may occur in the flow channel with sharp turns such as a snake shape is avoided, thereby ensuring the reliability of the electrode liquid flowing on the first electrode plate 21 and the second electrode plate 31, ensuring the reliability of the flowing electrode, namely ensuring the stability of the electric field where the electrode liquid is located, and ensuring the treatment efficiency of the water supply in the water treatment chamber.
Fig. 5 shows a comparison of salt ion adsorption performance of the flow-through capacitor module having the electrode plate with the planar spiral flow channel according to the present embodiment with respect to the comparative example. A comparative example is a flow-through capacitor module having electrode plates with serpentine flow channels commonly used in the art. As can be seen from the figure, the electrode plate adopting the planar spiral flow passage has better desalting performance, higher average desalting speed and higher desalting efficiency. Fig. 4 is a diagram showing a comparison of an electrode plate and an electrode plate having a serpentine flow channel in the comparative example.
In the present embodiment, the first electrode plate 21 is connected to a first connection terminal, and the second electrode plate 31 is connected to a second connection terminal. So as to access power supply through the first connecting terminal, thereby electrifying the electrode liquid in the first planar spiral flow channel; and similarly, the second wiring terminal is connected to supply power, so that the electrode liquid in the second planar spiral flow channel is electrified. Specifically, the first connecting terminal and the second connecting terminal can adopt titanium sheets.
In the embodiment, a first step groove 13 and a second step groove are respectively arranged on two sides of the water flow channel plate 1, and the first step groove 13 is communicated with the second step groove; the first electrode plate 21 and the cation exchange membrane 22 are disposed in the first stepped groove 13, and the second electrode plate 31 and the anion exchange membrane 32 are disposed in the second stepped groove. So, through the setting in first step groove 13 and second step groove, realized that rivers passageway board 1 is to the bordure protection of first electrode board 21, cation exchange membrane 22, second electrode board 31 and anion exchange membrane 32, improved the structural stability of whole circulation capacitor module, be favorable to guaranteeing the work safety of cation processing portion and anion processing portion to under the assurance operating condition, the stability of the electric field that electrode liquid locates.
In the present embodiment, the cation treatment section further includes a first protective plate 23, and the anion treatment section further includes a second protective plate 33. The first protection plate 23 is positioned on a side of the first electrode plate 21 away from the cation exchange membrane 22 to protect the first electrode plate 21; the second protection plate 33 is located on a side of the second electrode plate 31 facing away from the anion exchange membrane 32 to protect the second electrode plate 31.
In the present embodiment, the first protection plate 23 is disposed in the first stepped groove 13, and the second protection plate 33 is disposed in the second stepped groove, so that the stability of the relative positions of the first protection plate 23 and the second protection plate 33 with respect to the water flow path plate 1 is further improved, and the first electrode plate 21 and the cation exchange membrane 22 are pressed by the first protection plate 23, and the second electrode plate 31 and the anion exchange membrane 32 are pressed by the second protection plate 33, thereby further ensuring the stability and the sealing property of the whole of the circulating capacitor module.
In the present embodiment, the first protection plate 23 is provided with a first liquid inlet terminal 231 connected to the electrode liquid inlet of the first electrode plate 21 and a first liquid outlet terminal 232 connected to the electrode liquid outlet of the first electrode plate 21. The second protective plate 33 is provided with a second liquid inlet terminal 331 connected to the electrode liquid inlet of the second electrode plate 31 and a second liquid outlet terminal 332 connected to the electrode liquid outlet of the second electrode plate 31.
In this way, when the flow-through capacitor module works, the first liquid inlet terminal 231 and the first liquid outlet terminal 232 can both be connected with an external electrode liquid storage device, so that the first planar spiral flow channel and the electrode liquid storage device form a first electrode liquid circulation loop, and the electrode liquid circulation pump (not shown in the drawing) on the first electrode liquid circulation loop can realize the circulation flow of the electrode liquid in the first planar spiral flow channel. Similarly, the second liquid inlet terminal 331 and the second liquid outlet terminal 332 are both connected to an external electrode liquid storage device, so that the second planar spiral flow channel and the electrode liquid storage device form a second electrode liquid circulation loop, and an electrode liquid circulation pump (not shown in the drawings) on the second electrode liquid circulation loop can realize the circulation flow of the electrode liquid in the second planar spiral flow channel.
In this embodiment, the first connection terminal is disposed on the first protection plate 23, the first connection terminal, the first liquid inlet terminal 231 and the first liquid outlet terminal 232 are all disposed on one side of the first protection plate 23 departing from the cation exchange membrane 22, the second connection terminal is disposed on the second protection plate 33, and the second connection terminal, the second liquid inlet terminal 331 and the second liquid outlet terminal 332 are all disposed on one side of the second protection plate 33 departing from the anion exchange membrane 32. That is, the first connection terminal, the first liquid inlet terminal 231 and the first liquid outlet terminal 232 are concentrated on the same side of the first protection plate 23, and the second connection terminal, the second liquid inlet terminal 331 and the second liquid outlet terminal 332 are concentrated on the same side of the second protection plate 33, so that the symmetry and stability of the appearance structure of the whole circulating capacitor module are improved.
In the present embodiment, the first connection terminal includes a bolt electrode penetrating the first protection plate 23 and connected to the first electrode plate 21, and a titanium plate provided on the bolt electrode; the second connection terminal includes a bolt electrode passing through the second protection plate 33 and connected to the second electrode plate 31, and a titanium plate disposed on the bolt electrode. The arrangement of the titanium sheet is beneficial to improving the conductivity.
In this embodiment, a first elastic sealing gasket 24 and a second elastic sealing gasket 25 are provided on both sides of the cation exchange membrane 22. A third sealing elastic pad 34 and a fourth sealing elastic pad 35 are respectively arranged on both sides of the anion exchange membrane 32. The first elastic sealing pad 24 is clamped between the cation exchange membrane 22 and the first electrode plate 21, so that the sealing performance between the cation exchange membrane 22 and the first electrode plate 21 is improved, electrode liquid in the first plane spiral flow channel is prevented from leaking, and meanwhile, hard connection damage between the cation exchange membrane 22 and the first electrode plate 21 is also prevented. Similarly, the third elastic sealing pad 34 is clamped between the anion exchange membrane 32 and the second electrode plate 31, so as to improve the sealing performance between the cation exchange membrane 32 and the second electrode plate 31, prevent the electrode solution in the second planar spiral flow channel from leaking, and prevent the hard connection between the anion exchange membrane 32 and the second electrode plate 31 from being damaged. The second sealing elastic pad 25 is clamped between the cation exchange membrane 22 and the water flow channel plate 1, and the fourth sealing elastic pad 35 is clamped between the anion exchange membrane 32 and the water flow channel plate 1, so that hard connection damage is avoided, and the sealing of the water treatment cavity is realized.
In this embodiment, the first sealing gasket 24 and the second sealing gasket 25 are each provided with a through hole surrounding the first planar spiral flow passage. Therefore, the electrode liquid flowing through the first plane spiral flow channel directly contacts the cation exchange membrane 22, the electric field intensity of the cation exchange membrane 22 is improved, and the desorption efficiency of the electrode liquid is improved. Similarly, the third sealing gasket 34 and the fourth sealing gasket 35 are provided with through holes surrounding the second planar spiral flow passage.
Specifically, the first sealing elastic pad 24, the second sealing elastic pad 25, the third sealing elastic pad 34 and the fourth sealing elastic pad 35 may be rubber pads or silicone sheets.
In this embodiment, the cation exchange membrane 22 and the anion exchange membrane 32 are arranged in parallel, the water flow channel plate 1 is provided with a through hole for connecting the first step groove 13 and the second step groove, and the area surrounded by the through hole on the water flow channel plate 1 covers the first planar spiral flow channel and the second planar spiral flow channel, so that the salt ions in the replenishing water in the water treatment cavity can move freely, and the adsorption efficiency can be improved.
In this embodiment, the present invention further includes a plurality of threaded fasteners 4, and the plurality of threaded fasteners 4 sequentially pass through the first protective plate 23, the first electrode plate 21, the first elastic sealing gasket 24, the cation exchange membrane 22, the second elastic sealing gasket 25, the water flow passage plate 1, the third elastic sealing gasket 34, the anion exchange membrane 32, the fourth elastic sealing gasket 35, the second electrode plate 31, and the second protective plate 33. Specifically, the threaded fastener 4 is a bolt, and the first protection plate 23, the first electrode plate 21, the first sealing elastic pad 24, the cation exchange membrane 22, the second sealing elastic pad 25, the water flow passage plate 1, the third sealing elastic pad 34, the anion exchange membrane 32, the fourth sealing elastic pad 35, the second electrode plate 31 and the second protection plate 33 are fastened and connected through the bolt and the nut, so that the stability of the structure is ensured. Specifically, in the present embodiment, a plurality of bolts are evenly distributed on the circumference surrounding the first planar spiral flow passage to achieve circumferentially uniform distribution of the fastening force in the planar direction.
The embodiment also provides a water treatment system which comprises the circulating capacitor module, an electrode liquid storage 5 and a make-up water storage 6. The electrode solution storage 5 is respectively communicated with two ends of the first planar spiral flow channel to form a first electrode solution circulation loop, and the electrode solution storage 5 is also respectively communicated with two ends of the second planar spiral flow channel to form a second electrode solution circulation loop. That is, the first liquid inlet terminal 231, the first liquid outlet terminal 232, the second liquid inlet terminal 331 and the second liquid outlet terminal 332 are all connected with the electrode liquid storage device 5, and the electrode liquid storage device 5, the first liquid inlet terminal 231, the first planar spiral flow channel and the first liquid outlet terminal 232 form a first electrode liquid circulation loop; the electrode solution storage 5, the second liquid inlet terminal 331, the second planar spiral flow channel and the second liquid outlet terminal 332 form a second electrode solution circulation loop. The first electrode liquid circulation loop and the second electrode liquid circulation loop are connected in parallel. And electrode liquid circulating pumps (not shown in the attached drawing) are arranged on the first electrode liquid circulating loop and the second electrode liquid circulating loop. In specific implementation, the electrode solution circulation pumps may be respectively disposed on the first electrode solution circulation loop and the second electrode solution circulation loop, or the electrode solution circulation pumps with two flow channels may be disposed to simultaneously drive the electrode solutions on the first electrode solution circulation loop and the second electrode solution circulation loop to flow, so that the first planar spiral flow channel and the second planar spiral flow channel both circulate through the electrode solution storage 5, thereby implementing the flow electrode.
The make-up water storage 6 is respectively connected with the water inlet end 11 and the water outlet end 12, the make-up water storage 6 and the water treatment cavity form a water circulation loop, and a water pump (not shown in the figure) is arranged on the water circulation loop, so that water circulates through the water treatment cavity under the driving of the water pump, and the absorption and desorption effects are improved.
The performance of a water treatment system employing flow-through capacitor modules is further described below with reference to specific embodiments.
In this embodiment, the first electrode plate 21 and the second electrode plate 31 have dimensions of 80 × 80 × 5mm, and the electrode liquid flows in from the central end and flows out from the top end in both the first planar spiral flow channel and the second planar spiral flow channel. The electrode solution adopts an active carbon solution.
FIG. 6 shows a comparison of salt ion adsorption performance of examples at different voltages. This example was tested for desalting performance at five voltages of 1.2V, 1.6V, 2.0V, 2.4V, and 2.8V, respectively. It can be seen from the graph that as the voltage increases, the adsorption performance of the material tends to increase and then decrease. When the voltage is between 2.4V and 2.0V, the salt ion adsorption performance is best, the current is the largest, and the conductivity is reduced most quickly; the average desalting rate and the charge utilization rate are highest. Therefore, the optimal applied voltage of the current-through capacitor module is between 2.0 and 2.4V.
Fig. 7 shows a comparison of salt ion adsorption performance of the examples at different activated carbon concentration electrode solutions. This example was subjected to a desalting performance test using electrode solutions having an activated carbon content of 5 wt%, 7.5 wt% and 10 wt%, respectively. As can be seen from the figure, as the content of the activated carbon in the electrode solution increases, the desalting performance of the electrode solution gradually increases, the conductivity decreases faster and faster, and the average desalting rate and the charge utilization efficiency gradually increase. Therefore, the desalting performance of the electrode solution of 12.5 wt% is optimal in the test range.
Fig. 8 reveals a test of the stable operation of a single flow-through capacitor module over a long period of time. The test consisted of a single flow-through capacitor module at 50ml 3.5g L-1The stability of the module was tested by running the module steadily in aqueous NaCl make-up water for 48 hours. As can be seen from the figure, the capacitor module was stably operated within 48 hours, salt ions in water were completely removed, and excellent desalination efficiency was exhibited. In addition, salt ions on the electrode solution can be completely desorbed after reverse voltage application, which proves that the system can completely desorb the salt ions of the electrode solution, realizes the self-cleaning function of the electrode solution, and has obvious effect.
FIG. 9The final desalting performance of the examples under the optimum conditions of 2.4V applied voltage, 12.5 wt% electrode solution of activated carbon is disclosed. This example is at 3.5g L-1The desalting performance test was performed in the NaCl solution (2). Before the test, physical adsorption was performed for 2 hours, and it can be seen from the figure that after the electrode solution was fully activated and physically adsorbed, the electrode solution adsorbed salt ions in water at a significant rate and clean fresh water was obtained. The charge utilization efficiency is kept at a higher level of 58%, and excellent salt ion adsorption performance is shown.
As a result, the salt ion adsorption effect was the best when the 12.5 wt% activated carbon electrode solution was finally operated at 2.4V.
In conclusion, the embodiment of the utility model has stable and remarkable desalting performance, and does not have any liquid leakage streaming problem under the condition of long-time operation. The whole device has the advantages of simple equipment, easy operation, excellent performance, low process cost and wide development prospect.
The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A flow-through capacitor module, comprising: a water flow channel plate (1), a cation treatment part and an anion treatment part; the cation treatment part comprises a first electrode plate (21) and a cation exchange membrane (22), and the anion treatment part comprises a second electrode plate (31) and an anion exchange membrane (32); the cation exchange membrane (22) and the anion exchange membrane (32) are positioned at two sides of the water flow channel plate (1) and are matched with each other to form a water treatment cavity; the water flow channel plate (1) is provided with a water inlet end (11) and a water outlet end (12) which are both communicated with the water treatment cavity;
the first electrode plate (21) is positioned on one side of the cation exchange membrane (22) departing from the water treatment cavity, a first plane spiral flow channel is arranged on one side of the first electrode plate (21) facing the cation exchange membrane (22), and two ends of the first plane spiral flow channel are respectively used as an electrode liquid inlet and an electrode liquid outlet of the first electrode plate (21);
the second electrode plate (31) is positioned on one side of the anion exchange membrane (32) departing from the water treatment cavity, a second planar spiral flow channel is arranged on one side of the second electrode plate (31) facing the anion exchange membrane (32), and the two ends of the second planar spiral flow channel are respectively used as an electrode liquid inlet and an electrode liquid outlet of the second electrode plate (31);
the first electrode plate (21) is connected with a first wiring terminal, and the second electrode plate (31) is connected with a second wiring terminal.
2. The flow-through capacitor module according to claim 1, wherein the water flow passage plate (1) is provided at both sides thereof with a first stepped groove (13) and a second stepped groove, respectively, and the first stepped groove (13) communicates with the second stepped groove; the first electrode plate (21) and the cation exchange membrane (22) are arranged in the first stepped groove (13), and the second electrode plate (31) and the anion exchange membrane (32) are arranged in the second stepped groove.
3. The flow-through capacitor module of claim 2, wherein the cation treatment section further comprises a first protective sheet (23), and the anion treatment section further comprises a second protective sheet (33); the first protection plate (23) is positioned on one side of the first electrode plate (21) departing from the cation exchange membrane (22), and the second protection plate (33) is positioned on one side of the second electrode plate (31) departing from the anion exchange membrane (32).
4. A flow-through capacitor module according to claim 3, wherein the first protection plate (23) is arranged in the first step groove (13) and the second protection plate (33) is arranged in the second step groove.
5. The flow-through capacitor module according to claim 4, wherein the first protective plate (23) is provided with a first inlet terminal (231) connected to the electrode liquid inlet of the first electrode plate (21) and a first outlet terminal (232) connected to the electrode liquid outlet of the first electrode plate (21); the second protective plate (33) is provided with a second liquid inlet terminal (331) connected with an electrode liquid inlet of the second electrode plate (31) and a second liquid outlet terminal (332) connected with an electrode liquid outlet of the second electrode plate (31).
6. The flow-through capacitor module according to claim 5, wherein a first connection terminal is provided on the first protective plate (23) and is electrically connected to the first electrode plate (21), the first connection terminal, the first inlet terminal (231) and the first outlet terminal (232) are all located on a side of the first protective plate (23) facing away from the cation exchange membrane (22), a second connection terminal is provided on the second protective plate (33) and is electrically connected to the second electrode plate (31), and the second connection terminal, the second inlet terminal (331) and the second outlet terminal (332) are all located on a side of the second protective plate (33) facing away from the anion exchange membrane (32).
7. The flow-through capacitor module according to claim 2, wherein the cation exchange membrane (22) is provided on both sides with a first sealing gasket (24) and a second sealing gasket (25), respectively, and the anion exchange membrane (32) is provided on both sides with a third sealing gasket (34) and a fourth sealing gasket (35), respectively; the first sealing elastic cushion (24) and the second sealing elastic cushion (25) are respectively provided with a through hole surrounding the first plane spiral flow channel, and the third sealing elastic cushion (34) and the fourth sealing elastic cushion (35) are respectively provided with a through hole surrounding the second plane spiral flow channel; the cation exchange membrane (22) and the anion exchange membrane (32) are arranged in parallel, a through hole used for communicating the first step groove (13) with the second step groove is formed in the water flow channel plate (1), and a first plane spiral flow channel and a second plane spiral flow channel are covered in the area surrounded by the through hole in the water flow channel plate (1).
8. The flow-through capacitor module according to claim 7, further comprising a plurality of threaded fasteners (4), the plurality of threaded fasteners (4) passing through the first protective plate (23), the first electrode plate (21), the first sealing gasket (24), the cation exchange membrane (22), the second sealing gasket (25), the water flow channel plate (1), the third sealing gasket (34), the anion exchange membrane (32), the fourth sealing gasket (35), the second electrode plate (31) and the second protective plate (33) in sequence to fasten the entire assembly as a unit.
9. A water treatment system comprising a flow-through capacitor module according to any one of claims 1 to 8, further comprising an electrode fluid reservoir (5) and a makeup water reservoir (6); the electrode liquid storage device (5) is respectively communicated with two ends of the first planar spiral flow channel to form a first electrode liquid circulation loop, the electrode liquid storage device (5) is also respectively communicated with two ends of the second planar spiral flow channel to form a second electrode liquid circulation loop, and the first electrode liquid circulation loop and the second electrode liquid circulation loop are respectively provided with an electrode liquid circulation pump; the water supplementing and storing device (6) is respectively connected with the water inlet end (11) and the water outlet end (12), the water supplementing and storing device (6) and the water treatment cavity form a water circulation loop, and a water pump is arranged on the water circulation loop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121997603.5U CN216856312U (en) | 2021-08-24 | 2021-08-24 | Circulation capacitor module and water treatment system with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121997603.5U CN216856312U (en) | 2021-08-24 | 2021-08-24 | Circulation capacitor module and water treatment system with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116589050A (en) * | 2023-07-04 | 2023-08-15 | 上海菡水环保科技有限公司 | Automatic descaling electrochemical water treatment equipment with transverse shaft scraper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116589050A (en) * | 2023-07-04 | 2023-08-15 | 上海菡水环保科技有限公司 | Automatic descaling electrochemical water treatment equipment with transverse shaft scraper |
| CN116589050B (en) * | 2023-07-04 | 2023-11-14 | 上海菡水环保科技有限公司 | Automatic descaling electrochemical water treatment equipment with transverse shaft scraper |
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