Full-tab winding type membrane capacitance deionizing device

Abstract

The utility model relates to the technical field of membrane capacitance deionization, in particular to a full-tab winding type membrane capacitance deionization device. The membrane core is formed by sequentially winding a diversion separation net, an anionic membrane, an anode flexible electrode, an anionic membrane, a diversion separation net, a cationic membrane, a cathode flexible electrode and a cationic membrane, a full tab is arranged on one side of each flexible electrode, a central tube with a hole is arranged in the middle of the membrane core, two ends of the membrane core are closed, current collecting plates are arranged outside the two ends of the membrane core, and the current collecting plates are arranged in the center of the membrane core. At least one end of the central tube extends out of the current collecting disc, the current collecting disc is provided with a wiring terminal, the two ends of the membrane core and the shell are sealed, and the outer circle of the shell is provided with an interface. Compared with the prior art, the whole side face of the flexible electrode is in contact with the collector plate for electric conduction through the arrangement of the full-tab structure, the electron transmission path can be effectively shortened, and the capacitive deionization efficiency is improved; and the electrodes are isolated from water in a packaging and sealing manner, so that the water safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane capacitor deionization, in particular to a full-ear winding membrane capacitor deionization device. Background Art

[0002] Capacitive deionization technology is a treatment technology that uses the double-point layer on the surface of the electrode to adsorb and remove charged particles (such as anions and cations) in water. Its main structures are flat and winding. In comparison, the winding capacitor deionization device has the advantages of simple structure, convenient assembly, uniform water distribution, and low manufacturing cost. In the existing technology, for example, in a rolled capacitor deionization device disclosed in publication number CN108203192A, the positive and negative electrode terminals are directly set on the membrane shell to connect with the plate electrodes, resulting in a long electron transmission path and large power loss. At the same time, it also causes the capacitor to charge and discharge for a long time, affecting the efficiency of capacitor deionization. Summary of the invention

[0003] The utility model provides a full-ear winding membrane capacitor deionization device to overcome the deficiencies of the prior art.

[0004] To achieve the above purpose, a full-ear winding membrane capacitor deionization device is designed, wherein the membrane core is arranged in a shell, the membrane core comprises a flow guide spacer, an ion membrane and a flexible electrode, the ion membrane comprises a cation membrane and an anion membrane, the flexible electrode comprises an anode flexible electrode and a cathode flexible electrode, the membrane core is wound in sequence by the flow guide spacer, the anion membrane, the anode flexible electrode, the anion membrane, the flow guide spacer, the cation membrane, the cathode flexible electrode and the cation membrane, a full-ear is arranged on one side of the flexible electrode, the full-ear of the anode flexible electrode and the cathode flexible electrode are in opposite directions, a central tube with a hole is arranged in the middle of the membrane core, both ends of the membrane core are closed, current collecting plates are arranged outside both ends of the membrane core, both ends of the full-ear extends out of the membrane core to contact the current collecting plates, at least one end of the central tube extends out of the current collecting plate, the current collecting plate is provided with a wiring terminal, both ends of the membrane core are sealed with the shell, and the outer circle of the shell is provided with an interface.

[0005] Both ends of the membrane core are coated with sealant, and the full-polarity ear extends out of the sealant to contact the current collecting plate.

[0006] Both sides of the outer circle of the membrane core are wrapped with adhesive tape, and a sealing ring is arranged between the adhesive tape and the outer shell.

[0007] The full tab is a copper foil or an aluminum foil attached to one side of the flexible electrode.

[0008] The outer side of the full pole ear is serrated and is pressed inwardly on the outer side of the sealant.

[0009] The current collecting disk is an elastic conical conductive structure.

[0010] The substrate material of the flexible electrode is graphite paper, aluminum sheet, copper sheet or titanium sheet, and the flexible electrode is double-sided coated, and the coating material is carbon nanotubes, carbon black or graphene.

[0011] An adhesive tape is fixed in the middle of the membrane core.

[0012] Both ends of the shell are provided with covers, at least one end of the central tube extends out of the cover, and a transfer nut with a quick connector is installed at the end of the central tube extending out of the cover.

[0013] Compared with the prior art, the utility model sets a full-ear structure so that the side of the flexible electrode is in contact with the collecting disk as a whole for conductivity, which can effectively shorten the electron transmission path and improve the efficiency of capacitor deionization; at the same time, the electrode is isolated from water by packaging and sealing, ensuring water safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the utility model

[0015] Figure 2 Schematic diagram of the winding structure.

[0016] Figure 3 This is a partial enlarged view of the winding structure.

[0017] Figure 4 Schematic diagram of the end structure.

[0018] Figure 5 Schematic diagram of the flexible electrode.

[0019] See also Figure 1-Figure 5 , where 1 is the membrane core, 1-1 is the flow guide screen, 1-2 is the anion membrane, 1-3 is the flexible electrode, 1-3-1 is the anode flexible electrode, 1-3-2 is the cathode flexible electrode, 1-3-3 is the full electrode ear, 1-4 is the cationic membrane, 1-5 is the sealant, 1-6 is the center tube, 1-7 is the tape, 2 is the sealing ring, 3 is the outer shell, 4 is the cover, 5 is the collecting plate, 6 is the terminal, 7 is the adapter nut, and 8 is the interface. DETAILED DESCRIPTION

[0020] The utility model is further described below with reference to the accompanying drawings.

[0021] like Figure 1-Figure 5As shown, the membrane core 1 is arranged in the shell 3, the membrane core 1 includes a flow guide mesh 1-1, an ion membrane and a flexible electrode 1-3, the ion membrane includes a cation membrane 1-4 and an anion membrane 1-2, the flexible electrode 1-3 includes an anode flexible electrode 1-3-1 and a cathode flexible electrode 1-3-2, the membrane core 1 is sequentially wound by the flow guide mesh 1-1, the anion membrane 1-2, the anode flexible electrode 1-3-1, the anion membrane 1-2, the flow guide mesh 1-1, the cation membrane 1-4, the cathode flexible electrode 1-3-2, and the cation membrane 1-4, and the flexible electrode 1-3 is wound by the flexible electrode 1-3-1. A full pole ear 1-3-3 is provided on one side of the pole 1-3, and the full pole ears 1-3-3 of the anode flexible electrode 1-3-1 and the cathode flexible electrode 1-3-2 are in opposite directions. A central tube 1-6 with a hole is provided in the middle of the membrane core 1, and both ends of the membrane core 1 are closed. Current collecting plates 5 are provided outside the two ends of the membrane core 1. The full pole ear 1-3-3 extends out of the two ends of the membrane core 1 and contacts the current collecting plate 5. At least one end of the central tube 1-6 extends out of the current collecting plate 5. The current collecting plate 5 is provided with a wiring terminal 6. The two ends of the membrane core 1 are sealed from the outer shell 3, and the outer circle of the outer shell 3 is provided with an interface 8.

[0022] The two ends of the membrane core 1 are coated with sealant 1-5, and the full pole ear 1-3-3 extends out of the sealant 1-5 and contacts the current collecting plate 5. The sealant 1-5 seals the two ends of the membrane core 1, and water in the membrane core 1 only flows along the guide spacer 1-1, and does not flow from the two ends to the full pole ear 1-3-3.

[0023] The outer circumference of the membrane core 1 is wrapped with adhesive tapes 1-7 on both sides, and a sealing ring 2 is provided between the adhesive tapes 1-7 and the housing 3. The adhesive tapes 1-7 on both sides are wrapped to the position where the ends of the membrane core 1 are closed, and the two ends of the membrane core 1 and the housing 3 are sealed by the sealing rings 2. The interface 8 can be provided at the position between the sealing rings 2 at both ends to prevent water from flowing to the collecting plate 5 to cause short circuit and water pollution.

[0024] The full tab 1-3-3 is a copper foil or aluminum foil attached to one side of the flexible electrode 1-3. The copper foil or aluminum foil is easy to bend and can provide a good conductive effect.

[0025] The outer side of the full-electrode tab 1-3-3 is serrated, and is pressed inwardly on the outer side of the sealant 1-5. The serrated structure is bent into a triangle or trapezoid, which can cover most of the area outside the sealant 1-5, expand the contact area between the full-electrode tab 1-3-3 and the current collecting plate 5, and improve the conductive effect.

[0026] The collector plate 5 is a conical conductive structure. The bottom surface of the cone can be pressed and contacted with the full pole ear 1-3-3 for electrical conduction. The collector plate 5 can be die-casted using materials such as copper, aluminum, and titanium.

[0027] The base material of the flexible electrodes 1-3 is graphite paper, aluminum sheet, copper sheet or titanium sheet, and the flexible electrodes 1-3 are coated on both sides, and the coating material is at least one of carbon nanotubes, carbon black or graphene. Carbon black and graphene are conductive, and activated carbon and carbon nanotubes are loose and porous structures, which can improve the adsorption effect of the electrode.

[0028] An adhesive tape 1-7 is fixed in the middle of the membrane core 1. The adhesive tape 1-7 is used to fix the membrane roll structure, and can be fixed with an adhesive tape specially used for filter elements.

[0029] Both ends of the housing 3 are provided with covers 4, at least one end of the central tube 1-6 extends out of the cover 4, and an adapter nut 7 with a quick connector is installed at the end of the central tube 1-6 extending out of the cover 4. The adapter nut 7 is pressed outside the cover 4 to compact the collecting plate 5 and thus the electrode ear 1-3-3, fixing the entire device, and at the same time, it is convenient to connect with the external water pipe with a quick connector.

[0030] When the utility model is used, water enters the housing 3 from the interface 8, first stays outside the membrane core 1 and turns over to form turbulence, so that the ion concentration of the water is uniform to a certain extent, and then enters the membrane core 1 under pressure and flows along the guide screen 1-1, and the wiring terminal 6 of the current collecting disk 5 outside the full pole ear 1-3-3 of the anode flexible electrode 1-3-1 is positively charged, and the wiring terminal 6 of the current collecting disk 5 outside the full pole ear 1-3-3 of the cathode flexible electrode 1-3-2 is negatively charged, which respectively adsorb anions and cations, and finally enters the central tube 1-6 and flows out from the adapter nut 7 through the connecting quick connector.

[0031] The membrane core 1 is formed by coating the guide screen 1-1, the anion membrane 1-2, the anode flexible electrode 1-3-1, the anion membrane 1-2, the guide screen 1-1, the cation membrane 1-4, the cathode flexible electrode 1-3-2, and the two sides of the cation membrane 1-4 with sealant in sequence, and winding them with the central tube 1-6 as the reference. The two sides of the anion and cathode electrodes are used to form a positive-negative, negative-positive, positive-negative, and negative-positive circulating electric field inside the membrane core 1. When water flows in the guide screen 1-1, under the action of the electric field generated by the flexible electrode 1-3, anions pass through the anion membrane 1-2 and are adsorbed by the anode flexible electrode 1-3-1, and cations pass through the cation membrane and are adsorbed by the cathode flexible electrode 1-3-2. The ion membrane wrapped on both sides of the flexible electrode 1-3 can prevent the coating material of the flexible electrode 1-3 from entering the water, and at the same time prevent water from contacting the electrode material, especially the graphite paper, thereby improving the safety of drinking water. The filter element tape 1-7 is wound around the two sides and the middle of the membrane core 1 to fix the membrane core 1 and prevent the membrane from loosening. The tapes on both sides of the membrane core 1 are equipped with sealing rings 2 to prevent water from entering the collecting plate 5 and the full collecting ears 1-3-3.

[0032] When winding, the flow guide screen 1-1 connected to the central tube 1-6 is first wound with the central tube 1-5 for 1-2 turns to form a water collection channel; the cutting widths of the flow guide screen 1-1, the anion membrane 1-2, and the cation membrane 1-4 in the membrane core 1 are consistent, and the width of the flexible electrode 1-3 is 1-4 cm wider than the ion membrane. When stacked, one side of the flexible electrode 1-3 is indented 2-5 mm from the flow guide screen 1-1 and the ion membrane, and the widened part on the other side is the full pole ear 1-3-3, and the setting directions of the anode flexible electrode 1-3-1 and the cathode flexible electrode 1-3-2 are opposite. The part of the flexible electrode 1-3 that is widened from one side of the ion membrane is left blank, and no active material is plated. The blank part is pasted with double-sided conductive copper foil or aluminum foil as the full pole ear 1-3-3, and the conductive copper foil or aluminum foil penetrates 2-5 mm into the anion membrane 1-2 or the cation membrane 1-4 to protect the flexible electrode 1-3.

[0033] When using the membrane capacitor deionization device of the utility model, the entire pole ear 1-3-3 does not contact water, and a large number of materials can be selected. Especially in the application of drinking water, traditional electrodes need to use metals such as titanium as current collectors. Under the same processing capacity conditions, the production cost can be significantly reduced. The electrode material is isolated from the water body by the packaging of the sealing ring 2 to ensure the safety of drinking water. The entire pole ear 1-3-3 of the utility model contacts the current collecting plate 5 with a surface. Compared with the traditional point or line contact electrode, under the same electrode area conditions, it can reduce the internal resistance by more than 50% and the contact resistance by more than 30%, and at the same time, shorten the charge and discharge time by nearly 50%; due to the reduction of internal resistance and contact resistance, the traditional 1.5-1.6V working voltage can be reduced to 1.3-1.4V, effectively reducing the energy loss caused by heat.

Claims

1. A full-electrode-lug wound membrane capacitor deionization device, comprising a membrane core (1), Features: The membrane core (1) is arranged in the housing (3), the membrane core (1) comprises a flow guide mesh (1-1), an ion membrane and a flexible electrode (1-3), the ion membrane comprises a cation membrane (1-4) and an anion membrane (1-2), the flexible electrode (1-3) comprises an anode flexible electrode (1-3-1) and a cathode flexible electrode (1-3-2), the membrane core (1) is sequentially wound by the flow guide mesh (1-1), the anion membrane (1-2), the anode flexible electrode (1-3-1), the anion membrane (1-2), the flow guide mesh (1-1), the cation membrane (1-4), the cathode flexible electrode (1-3-2), and the cation membrane (1-4), the flexible electrode (1-3-1) and the cathode flexible electrode (1-3-2). -3) is provided with a full-pole ear (1-3-3) on one side, the full-pole ears (1-3-3) of the anode flexible electrode (1-3-1) and the cathode flexible electrode (1-3-2) are in opposite directions, a central tube (1-6) with a hole is provided in the middle of the membrane core (1), both ends of the membrane core (1) are closed, and current collecting plates (5) are provided outside the two ends of the membrane core (1), the full-pole ear (1-3-3) extends out of the two ends of the membrane core (1) and contacts the current collecting plates (5), at least one end of the central tube (1-6) extends out of the current collecting plates (5), the current collecting plates (5) are provided with wiring terminals (6), the two ends of the membrane core (1) and the outer shell (3) are sealed, and the outer circle of the outer shell (3) is provided with an interface (8).

2. A full-electrode-wound membrane capacitor deionization device according to claim 1, Features: Both ends of the membrane core (1) are coated with sealant (1-5), and the full-pole tab (1-3-3) extends out of the sealant (1-5) and contacts the current collecting plate (5).

3. A full-electrode-wound membrane capacitor deionization device according to claim 1, Features: Both sides of the outer circle of the membrane core (1) are wrapped with adhesive tape (1-7), and a sealing ring (2) is provided between the adhesive tape (1-7) and the outer shell (3).

4. A full-electrode-wound membrane capacitor deionization device according to claim 1, Features: The full electrode tab (1-3-3) is a copper foil or an aluminum foil attached to one side of the flexible electrode (1-3).

5. The full-electrode-wound membrane capacitor deionization device according to claim 1, Features: The outer side of the full pole tab (1-3-3) is serrated and is pressed inwardly onto the outer side of the sealant (1-5).

6. A full-electrode winding membrane capacitor deionization device according to claim 1, Features: The current collecting plate (5) is a conical conductive structure.

7. The full-electrode-wound membrane capacitor deionization device according to claim 1, Features: An adhesive tape (1-7) is fixed in the middle of the membrane core (1).

8. The full-electrode-wound membrane capacitor deionization device according to claim 1, Features: Both ends of the shell (3) are provided with covers (4), at least one end of the central tube (1-6) extends out of the cover (4), and a switching nut (7) with a quick connector is installed at the end of the central tube (1-6) extending out of the cover (4).

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