Electrolysis cell and electrolysis cell integrated module

Abstract

This application provides an electrolysis unit and an integrated module of the electrolysis unit. The electrolysis unit includes: a cathode portion and a cathode rod. The cathode portion includes a first end and a second end opposite to each other. The cathode rod extends along a first direction and penetrates the cathode portion, with one end of the cathode rod extending out of the first end of the cathode portion. A first space exists between the inner wall of the cathode portion and the cathode rod. The first space contains an intermediate vanadium electrolyte product to be electrolyzed and reduced. The cathode portion includes a cathode outlet pipe at the first end and a cathode inlet pipe at the second end. A diaphragm surrounds the outside of the cathode portion, and the inner wall of the diaphragm is in close contact with the outer surface of the cathode portion. An anode portion includes a third end, a fourth end opposite to each other, and a frame plate located between the third end and the fourth end. The anode portion surrounds the outside of the diaphragm. A second space exists between the inner wall of the anode portion and the diaphragm. The second space contains a dilute sulfuric acid solution. The anode portion includes an anode outlet pipe at the third end and an anode inlet pipe at the fourth end.

Description

Technical Field

[0001] This application relates to the field of electrolytic cell technology, and in particular to an electrolytic unit and an integrated module for the electrolytic unit. Background Technology

[0002] Electrolysis, as a redox technology, is widely used in the production of vanadium electrolyte. The structural forms of vanadium electrolyte electrolysis production equipment are mainly divided into tank electrolysis units and stack electrolysis units. Tank electrolysis units generally use a single electrolysis cell as the electrolysis unit, with multiple electrolysis cells connected in series or parallel to form a production system. Tank electrolysis units suffer from problems such as high voltage, large footprint, and low production efficiency.

[0003] Stacked electrolysis units are typically composed of multiple electrolysis units stacked together, and their high integration and production efficiency make them popular in the industry. However, because the electrolysis units in a stacked electrolysis unit are connected in parallel, when individual units malfunction, such as due to partial short circuits or uneven flow fields causing overheating, the entire stacked electrolysis unit needs to be disassembled for repair. If the malfunction is not repaired in time or not detected promptly, it may lead to the burnout of the faulty unit or even adjacent units, resulting in high costs in terms of manpower, materials, and time for stack maintenance. Therefore, there is an urgent need in this field for an electrolysis unit and its integrated module that offers high integration, high efficiency, and low maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this application is to provide an electrolysis unit and an electrolysis unit integrated module with high integration and high independence, which can significantly reduce the manpower, material resources and time costs of maintaining the electrolysis unit integrated module.

[0005] To address the aforementioned technical problems, this application provides an electrolysis unit, comprising: a cathode portion and a cathode rod, the cathode portion including a first end and a second end opposite to each other, the cathode rod extending along a first direction and penetrating the cathode portion, with one end of the cathode rod extending out of the first end of the cathode portion, a first space between the inner wall of the cathode portion and the cathode rod, the first space containing an intermediate vanadium electrolyte product to be electrolyzed and reduced, the cathode portion including a cathode outlet pipe at the first end and a cathode inlet pipe at the second end; a diaphragm surrounding the outside of the cathode portion, the inner wall of the diaphragm being in close contact with the outer surface of the cathode portion; and an anode portion including a third end, a fourth end opposite to each other, and a frame plate located between the third end and the fourth end, the anode portion surrounding the outside of the diaphragm, a second space between the inner wall of the anode portion and the diaphragm, the second space containing a dilute sulfuric acid solution, the anode portion including an anode outlet pipe at the third end and an anode inlet pipe at the fourth end.

[0006] Optionally, the cathode portion includes an upper frame plate and a lower frame plate, the upper frame plate being located at the first end and the lower frame plate being located at the second end, wherein the cathode outlet pipe is located on the upper frame plate and the cathode inlet pipe is located on the lower frame plate.

[0007] Optionally, the first space is formed between the lower surface of the upper frame plate, the upper surface of the lower frame plate, the inner wall of the diaphragm, and the outer wall of the cathode rod.

[0008] Optionally, the upper frame plate further includes a cathode rod mounting hole, and the lower frame plate further includes a cathode rod limiting member. One end of the cathode rod passes through the cathode rod mounting hole and exits the upper frame plate, while the other end is fixedly connected to the cathode rod limiting member.

[0009] Optionally, the portion of the cathode rod that passes through the cathode rod mounting hole is a contact portion, the outer wall of the contact portion is in close contact with the inner wall of the cathode rod mounting hole, and a cathode rod sealing ring is provided between the outer wall of the contact portion and the inner wall of the cathode rod mounting hole, the cathode rod sealing ring being adapted to seal the cathode rod and the cathode rod mounting hole.

[0010] Optionally, the cathode portion further includes a side mesh that is in close contact with the diaphragm to support the diaphragm in a second direction perpendicular to the first direction.

[0011] Optionally, the electrolysis unit further includes an upper frame plate sealing ring and a lower frame plate sealing ring. The upper frame plate sealing ring is located on the outer peripheral wall of the upper frame plate, and the lower frame plate sealing ring is located on the outer peripheral wall of the lower frame plate. The upper frame plate sealing ring is located between the diaphragm and the upper frame plate, and the lower frame plate sealing ring is located between the diaphragm and the lower frame plate. The upper frame plate sealing ring is adapted to seal the diaphragm and the upper frame plate, and the lower frame plate sealing ring is adapted to seal the diaphragm and the lower frame plate.

[0012] Optionally, the cathode rod comprises a carbon rod, the diaphragm comprises a perfluorosulfonic acid proton exchange membrane, and a portion of the diaphragm is provided with graphite felt, the graphite felt being adapted to provide a reaction site for the vanadium electrolyte intermediate product to be electrolytically reduced.

[0013] Optionally, the anode portion further includes an upper ring plate and a lower ring plate, the upper ring plate being located at the third end, the lower ring plate being located at the fourth end, and the frame plate being located between the upper ring plate and the lower ring plate. The upper ring plate includes an outer peripheral wall, the lower ring plate includes an outer peripheral wall, and the frame plate extends from the outer peripheral wall of the upper ring plate to the outer peripheral wall of the lower ring plate in the first direction.

[0014] Optionally, the frame plate, the upper ring plate, and the lower ring plate are made of titanium metal, and an insulating material is coated on the outer wall of a portion of the frame plate. The upper ring plate includes a first surface closer to the lower ring plate, and the lower ring plate includes a second surface closer to the upper ring plate. The first surface, the second surface, and the inner wall of the frame plate are coated with iridium-tantalum. The second space is formed between the first surface, the second surface, the inner wall of the frame plate, and the diaphragm.

[0015] Optionally, the electrolysis unit further includes an anode tab connected to the frame plate and extending from the outer wall of the frame plate.

[0016] To address the aforementioned technical problems, this application provides an integrated electrolysis unit module, comprising: multiple electrolysis units as described above; a cathode outlet main pipe and multiple cathode outlet manifolds, wherein the multiple cathode outlet manifolds are connected to the cathode outlet main pipe, and each cathode outlet manifold is connected to the cathode outlet pipe of the electrolysis unit; a cathode inlet main pipe and multiple cathode inlet manifolds, wherein the multiple cathode inlet manifolds are connected to the cathode inlet main pipe, and each cathode inlet manifold is connected to the cathode inlet pipe of the electrolysis unit; and an anode outlet. The system includes a main anode and multiple anode outlet manifolds, each of which is connected to the anode outlet main anode and the anode outlet manifold of the electrolysis unit. It also includes an anode inlet main anode and multiple anode inlet manifolds, each of which is connected to the anode inlet main anode and the anode inlet manifold of the electrolysis unit. Each of the cathode outlet manifold, cathode inlet manifold, anode outlet manifold, and anode inlet manifold is equipped with a valve.

[0017] Optionally, the electrolysis unit integrated module further includes: a cathode main line, with multiple cathode rod connecting lines connected to the cathode main line, each cathode rod connecting line being electrically connected to the cathode rod of the electrolysis unit; an anode main line, with multiple anode tab connecting lines being electrically connected to the anode main line, each anode tab connecting line being electrically connected to the anode tab of the electrolysis unit; and a switch is provided on both the cathode rod connecting lines and the anode tab connecting lines.

[0018] Compared with existing technologies, this application adopts a cylindrical electrolysis unit structure with a cathode, an anode, and a cathode rod. Compared with the planar electrolysis unit of a stack electrolysis device, it has a higher surface area and a higher degree of integration of the electrolysis unit. It also has the advantage of a more uniform flow field. In the electrolysis unit integrated module composed of the electrolysis units of this application, each electrolysis unit is independent and has a strong sense of distance. Since each electrolysis unit has valves on its cathode outlet manifold, cathode inlet manifold, anode outlet manifold, and anode inlet manifold, when an individual electrolysis unit fails, it is not necessary to disassemble the entire electrolysis unit integrated module. It is only necessary to close the valve of the faulty electrolysis unit and perform individual repairs. This can significantly reduce the manpower, material resources, and time costs of maintaining the electrolysis unit integrated module. Attached Figure Description

[0019] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an electrolysis unit according to an embodiment of this application; Figure 2 This application is as follows Figure 1 Exploded cross-sectional view of the electrolysis unit shown; Figure 3 This is a schematic diagram of the structure of an integrated electrolysis unit module in one embodiment of this application. Detailed Implementation

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0021] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0026] It should be understood that when a component is referred to as "on another component," "connected to another component," "coupled to another component," or "in contact with another component," it can be directly on, connected to, coupled to, or in contact with that other component, or there may be an intervening component. In contrast, when a component is referred to as "directly on another component," "directly connected to," "directly coupled to," or "directly in contact with" another component, there is no intervening component. Similarly, when a first component is referred to as "electrically contacting" or "electrically coupled to" a second component, there is an electrical path between the first and second components that allows current to flow. This electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even if there is no direct contact between the conductive components.

[0027] This application refers to Figures 1-3 An electrolysis unit 10 is proposed, wherein Figure 1 A schematic diagram of the overall structure of the electrolysis unit 10 is shown. Figure 2 As shown Figure 1 The exploded cross-sectional view of the electrolysis unit 10 is shown. Now, in conjunction with... Figures 1-2 The specific structure of the electrolysis unit 10 is described below. In this embodiment, the electrolysis unit 10 has a cylindrical structure.

[0028] First refer to Figures 1-2 As shown, the electrolysis unit 10 mainly includes a cathode section 11, a cathode rod 12, an anode section 13, and a diaphragm 14. Specifically, the cathode section 11 includes a first end 21 and a second end 22 opposite to each other. The cathode rod 12 extends along a first direction Y and penetrates the cathode section 11, with one end of the cathode rod 12 extending out of the first end 21 of the cathode section 11. A first space S1 is formed between the inner wall of the cathode section 11 and the cathode rod 12. The first space S1 contains the vanadium electrolyte intermediate product to be electrolyzed and reduced. The cathode section 11 includes a cathode outlet pipe 31 at the first end 21 and a cathode inlet pipe 32 at the second end 22.

[0029] Furthermore, in the electrolysis unit 10, the diaphragm 14 surrounds the outside of the cathode portion 11, and the inner wall of the diaphragm 14 is in close contact with the outer surface of the cathode portion 11. Preferably, in this embodiment, the cathode portion 11 further includes a side mesh 35, which is in close contact with the diaphragm 14 to support the diaphragm 14 in a second direction X perpendicular to the first direction Y. Since the diaphragm 14 is a perfluorosulfonic acid proton exchange membrane, which has a certain degree of flexibility, the side mesh 35 can better support the diaphragm 14 inside the electrolysis unit 10, ensuring that the diaphragm 14 is stably supported within the electrolysis unit 10 and preventing deformation due to uneven stress on both sides, or even diaphragm rupture leading to internal liquid leakage.

[0030] A clearer reference Figures 1-2 The cathode section 11 includes an upper frame plate 42 and a lower frame plate 43. The upper frame plate 42 is located at the first end 21, and the lower frame plate 43 is located at the second end 22. The cathode outlet pipe 31 is located on the upper frame plate 42, and the cathode inlet pipe 32 is located on the lower frame plate 43. A first space S1 is formed between the lower surface S10 of the upper frame plate 42, the upper surface S11 of the lower frame plate 43, the inner wall of the diaphragm S12, and the outer wall S13 of the cathode rod 12.

[0031] In this embodiment, the upper frame plate 42, the lower frame plate 43, and the side mesh 35 are made of corrosion-resistant polymer materials. In the electrolysis unit 10, the upper frame plate 42, the lower frame plate 43, and the side mesh 35 are in direct contact with the intermediate vanadium electrolyte product to be electrolyzed and reduced in the first space S1. Therefore, the use of corrosion-resistant polymer materials can ensure that the upper frame plate 42, the lower frame plate 43, and the side mesh 35 are not corroded by the intermediate vanadium electrolyte product to be electrolyzed and reduced, thus ensuring the structural stability of the upper frame plate 42, the lower frame plate 43, and the side mesh 35, thereby further ensuring the performance of the electrolytic cell.

[0032] Furthermore, the upper frame plate 42 also includes a cathode rod mounting hole 25, and the lower frame plate 43 includes a cathode rod limiting member 26. One end 121 of the cathode rod 12 passes through the cathode rod mounting hole 25 and extends out of the upper frame plate 42, while the other end 122 is fixedly connected to the cathode rod limiting member 26. The cathode rod mounting hole 25 allows the cathode rod 12 to extend out of the upper frame plate 42 and connect with the external circuit (see reference). Figure 3 The cathodes of multiple electrolysis units 10 are connected to the cathode main line 91, thereby enabling interconnection between the cathodes of the multiple electrolysis units 10. By providing cathode rod limiting members 26 on the lower frame plate 43, the position of the cathode rod 12 in the electrolysis unit 10 can be further fixed, ensuring that the cathode rod 12 will not easily displace inside the electrolysis unit 10, thereby further ensuring the performance stability of the electrolysis unit 10.

[0033] In this embodiment, the portion of the cathode rod 12 that passes through the cathode rod mounting hole 25 is the contact portion 27. The outer wall S3 of the contact portion 27 is in close contact with the inner wall S4 of the cathode rod mounting hole 25. A cathode rod sealing ring 28 is provided between the outer wall S3 of the contact portion 27 and the inner wall S4 of the cathode rod mounting hole 25. The cathode rod sealing ring 28 is suitable for sealing the cathode rod 12 and the cathode rod mounting hole 25. Further, the electrolysis unit 10 also includes an upper frame plate sealing ring 29 and a lower frame plate sealing ring 36. The upper frame plate sealing ring 29 is located on the outer peripheral wall S51 of the upper frame plate 42, and the lower frame plate sealing ring 36 is located on the outer peripheral wall S52 of the lower frame plate 43. The upper frame plate sealing ring 29 is located between the diaphragm 14 and the upper frame plate 42, and the lower frame plate sealing ring 36 is located between the diaphragm 14 and the lower frame plate 43. The upper frame plate sealing ring 29 is suitable for sealing the diaphragm 14 and the upper frame plate 42, and the lower frame plate sealing ring 29 is suitable for sealing the diaphragm 14 and the lower frame plate 43.

[0034] Furthermore, by providing a cathode rod sealing ring 28 between the outer wall S3 of the contact portion 27 and the inner wall S4 of the cathode rod mounting hole 25, the intermediate vanadium electrolyte product to be electrolyzed and reduced in the first space S1 can be further sealed to prevent leakage to the outside through the cathode rod mounting hole 25. At the same time, the structure of providing an upper frame plate sealing ring 29 on the outer peripheral wall S51 of the upper frame plate 42 and a lower frame plate sealing ring 36 on the outer peripheral wall S52 of the lower frame plate 43 can further seal the gap between the diaphragm 14 and the upper frame plate 42, ensuring that the intermediate vanadium electrolyte product to be electrolyzed and reduced will not leak to the outside through the gap between the diaphragm 14 and the upper frame plate 42 or the gap between the diaphragm 14 and the lower frame plate 43, thereby further improving the sealing performance of the electrolysis unit 10 and thus further improving the stability of the electrolysis unit 10.

[0035] In this preferred embodiment, the cathode rod 12 comprises a carbon rod, and a portion of the diaphragm 14 is provided with graphite felt (not shown). The graphite felt is suitable for providing a reaction site for the vanadium electrolyte intermediate product to be electrolytically reduced. The first space S1 of the electrolysis unit 10 contains the vanadium electrolyte intermediate product to be electrolytically reduced. The vanadium electrolyte intermediate product to be electrolytically reduced is a tetravalent vanadium electrolyte. Under a certain current density, the tetravalent vanadium element is further reduced to trivalent vanadium element. The cathode rod 12, comprising a carbon rod, provides a reaction site for the vanadium electrolyte intermediate product to be electrolytically reduced. Since the vanadium electrolyte intermediate product to be electrolytically reduced can also react on the graphite felt, providing graphite felt on the diaphragm 14 can further increase the reactive surface area of ​​the vanadium electrolyte intermediate product to be electrolytically reduced, resulting in more reaction sites for the vanadium electrolyte intermediate product to be electrolytically reduced in the electrolysis unit 10, thereby further improving the efficiency of the electrolysis cell.

[0036] On the other hand, the anode portion 13 includes a third end 23, a fourth end 24, and a frame plate 41 located between the third end 23 and the fourth end 24. The anode portion 13 surrounds the outside of the diaphragm 14. A second space S2 is formed between the inner wall of the anode portion 13 and the diaphragm 14. The second space S2 contains a dilute sulfuric acid solution. The anode portion 13 includes an anode outlet pipe 33 at the third end 23 and an anode inlet pipe 34 at the fourth end 24. On the other hand, the anode portion 13 also includes an upper ring plate 44 and a lower ring plate 45. The upper ring plate 44 is located at the third end 23, and the lower ring plate 45 is located at the fourth end 24. The frame plate 41 is located between the upper ring plate 44 and the lower ring plate 45. The upper ring plate 44 includes an outer peripheral wall S6, and the lower ring plate 45 includes an outer peripheral wall S7. The frame plate 41 extends from the outer peripheral wall S6 of the upper ring plate to the outer peripheral wall S7 of the lower ring plate in the first direction Y. The anode portion 13 also includes an anode tab 46, which is connected to the frame plate 41 and extends out from the outer wall S8 of the frame plate 41.

[0037] In this embodiment, the frame plate 41, the upper ring plate 44, and the lower ring plate 45 are made of titanium. The outer wall S8 of the frame plate 41, except for the part in contact with the anode tab 46, is coated with an insulating material to provide insulation for the electrolysis unit 10. The upper ring plate 44 includes a first surface S31 closer to the lower ring plate 45, and the lower ring plate 45 includes a second surface S32 closer to the upper ring plate 44. A second space S2 is formed between the first surface S31, the second surface S32, the inner wall S8 of the frame plate, and the diaphragm 14. In this preferred embodiment, the first surface S31, the second surface S32, and the inner wall S8 of the frame plate are coated with iridium-tantalum. Since the interior of the second space S2 is a dilute sulfuric acid solution, coating the first surface S31, the second surface S32, and the inner wall S8 of the frame plate with iridium-tantalum can ensure that the upper ring plate 44, the lower ring plate 45, and the inner wall S8 of the frame plate are not corroded by the dilute sulfuric acid solution, thus ensuring the structural stability of the upper ring plate 44, the lower ring plate 45, and the frame plate 41, thereby further ensuring the performance of the electrolytic cell.

[0038] In this preferred embodiment, sealing rings (not shown) are provided at the contact points between the upper ring plate 44 and the diaphragm 14, and at the contact points between the lower ring plate 45 and the diaphragm 14, to ensure that the dilute sulfuric acid solution does not leak to the outside through the gaps between the diaphragm 14 and the upper ring plate 44 or between the diaphragm 14 and the lower ring plate 45, thereby further improving the sealing performance of the electrolysis unit 10 and thus further improving the stability of the electrolysis unit 10.

[0039] In another aspect, this application also proposes an electrolysis unit integration module 100, including multiple electrolysis units proposed in any embodiment of this application, such as the electrolysis unit 10 described above. The electrolysis unit integration module 100 further includes a cathode outlet main pipe 51 and multiple cathode outlet manifolds 52, the multiple cathode outlet manifolds 52 being connected to the cathode outlet main pipe 51, and each cathode outlet manifold 52 being connected to the cathode outlet pipe 31 of the electrolysis unit 10; a cathode inlet main pipe 61 and multiple cathode inlet manifolds 62, the multiple cathode inlet manifolds 62 being connected to the cathode inlet main pipe 61, and each cathode inlet manifold 62 being connected to the cathode inlet pipe 32 of the electrolysis unit 10.

[0040] In this embodiment, each electrolysis unit 10 is connected in parallel, so each unit 10 has strong independence. When a certain electrolysis unit 10 in the electrolysis unit integration module 100 fails, it will not affect the operation of the overall electrolysis unit integration module 100, thus ensuring the operation of the electrolysis unit integration module 100.

[0041] Furthermore, the electrolysis unit integrated module 100 also includes an anode liquid outlet main pipe 71 and multiple anode liquid outlet manifolds 72, the multiple anode liquid outlet manifolds 72 being connected to the anode liquid outlet main pipe 71, and each anode liquid outlet manifold 72 being connected to the anode liquid outlet pipe 33 of the electrolysis unit 10; an anode liquid inlet main pipe 81 and multiple anode liquid inlet manifolds 82, the multiple anode liquid inlet manifolds 82 being connected to the anode liquid inlet main pipe 81, and each anode liquid inlet manifold 82 being connected to the anode liquid inlet pipe 34 of the electrolysis unit 10.

[0042] In this embodiment, valves 83 are provided on the cathode outlet manifold 52, cathode inlet manifold 62, anode outlet manifold 72, and anode inlet manifold 82. By using valves 83, when a certain electrolysis unit 10 malfunctions, only the corresponding manifold of the malfunctioning electrolysis unit 10 needs to be closed to stop the operation of that malfunctioning electrolysis unit 10. This allows for individual repair of the malfunctioning electrolysis unit 10 without affecting the operation of other electrolysis units 10.

[0043] On the other hand, the electrolysis unit integration module 100 also includes a cathode main line 91 and an anode main line 92, with multiple cathode rod connecting lines 93 connected to the cathode main line 91, and each cathode rod connecting line 93 connected to the cathode rod 12 of the electrolysis unit. Furthermore, multiple anode tab connecting lines 94 are connected to the anode main line 92, and each anode tab connecting line 94 is connected to the anode tab 46 of the electrolysis unit 10.

[0044] In this embodiment, both the cathode rod connecting line 93 and the anode tab connecting line 94 are equipped with switches 95. With the setting of switches 95, when a certain electrolysis unit 10 malfunctions, it is only necessary to turn off the corresponding circuit switch of the malfunctioning electrolysis unit 10 to stop the operation of the malfunctioning electrolysis unit 10 and disconnect the malfunctioning electrolysis unit 10 from the anode main line 92 or the cathode main line 91. Thus, the malfunctioning electrolysis unit 10 can be disassembled and maintained separately without disassembling and maintaining the entire electrolysis unit integrated module 100, thereby significantly reducing the manpower, material resources and time costs of maintaining the electrolysis unit integrated module.

[0045] This application employs a cylindrical electrolysis unit structure with a cathode, an anode, and a cathode rod. Compared to the planar electrolysis unit of a stack electrolysis device, this structure has a higher surface area, a higher degree of integration, and a more uniform flow field. In the integrated electrolysis unit module assembled by the electrolysis units of this application, each electrolysis unit is independent and highly spaced. Since each electrolysis unit has valves on its cathode outlet manifold, cathode inlet manifold, anode outlet manifold, and anode inlet manifold, when an individual electrolysis unit malfunctions, it is not necessary to disassemble the entire integrated electrolysis unit module. Only the valve of the malfunctioning electrolysis unit needs to be closed for individual repair, which can significantly reduce the manpower, material resources, and time costs of maintaining the integrated electrolysis unit module.

[0046] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0047] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0048] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0049] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0050] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. An electrolysis unit, characterized in that, include: The cathode portion includes a first end and a second end opposite to each other. The cathode rod extends along a first direction and penetrates the cathode portion, with one end of the cathode rod extending out of the first end of the cathode portion. A first space exists between the inner wall of the cathode portion and the cathode rod. The first space contains an intermediate vanadium electrolyte product to be electrolyzed and reduced. The cathode portion includes a cathode outlet pipe at the first end and a cathode inlet pipe at the second end. A diaphragm surrounds the outside of the cathode portion, and the inner wall of the diaphragm is in close contact with the outer surface of the cathode portion; as well as The anode portion includes a third end, a fourth end, and a frame plate located between the third end and the fourth end. The anode portion surrounds the outside of the diaphragm. A second space exists between the inner wall of the anode portion and the diaphragm. The second space contains a dilute sulfuric acid solution. The anode portion includes an anode outlet pipe at the third end and an anode inlet pipe at the fourth end.

2. The electrolysis unit as described in claim 1, characterized in that, The cathode section includes an upper frame plate and a lower frame plate, the upper frame plate is located at the first end, and the lower frame plate is located at the second end. The cathode outlet pipe is located on the upper frame plate, and the cathode inlet pipe is located on the lower frame plate.

3. The electrolysis unit as described in claim 2, characterized in that, The first space is formed between the lower surface of the upper frame plate, the upper surface of the lower frame plate, the inner wall of the diaphragm, and the outer wall of the cathode rod.

4. The electrolysis unit as described in claim 2, characterized in that, The upper frame plate also includes a cathode rod mounting hole, and the lower frame plate also includes a cathode rod limiting member. One end of the cathode rod passes through the cathode rod mounting hole and exits the upper frame plate, while the other end is fixedly connected to the cathode rod limiting member.

5. The electrolysis unit as described in claim 4, characterized in that, The portion of the cathode rod that passes through the cathode rod mounting hole is the contact portion. The outer wall of the contact portion is in close contact with the inner wall of the cathode rod mounting hole. A cathode rod sealing ring is provided between the outer wall of the contact portion and the inner wall of the cathode rod mounting hole. The cathode rod sealing ring is adapted to seal the cathode rod and the cathode rod mounting hole.

6. The electrolysis unit as described in claim 2, characterized in that, The cathode portion further includes a side mesh that is in close contact with the diaphragm to support the diaphragm in a second direction perpendicular to the first direction.

7. The electrolysis unit as described in claim 2, characterized in that, It also includes an upper frame plate sealing ring and a lower frame plate sealing ring. The upper frame plate sealing ring is located on the outer peripheral wall of the upper frame plate, and the lower frame plate sealing ring is located on the outer peripheral wall of the lower frame plate. The upper frame plate sealing ring is located between the diaphragm and the upper frame plate, and the lower frame plate sealing ring is located between the diaphragm and the lower frame plate. The upper frame plate sealing ring is adapted to seal the diaphragm and the upper frame plate, and the lower frame plate sealing ring is adapted to seal the diaphragm and the lower frame plate.

8. The electrolysis unit as described in claim 1, characterized in that, The cathode rod includes a carbon rod, the diaphragm includes a perfluorosulfonic acid proton exchange membrane, and a portion of the diaphragm is provided with graphite felt, which is adapted to provide a reaction site for the vanadium electrolyte intermediate product to be electrolytically reduced.

9. The electrolysis unit as described in claim 1, characterized in that, The anode portion further includes an upper ring plate and a lower ring plate. The upper ring plate is located at the third end, and the lower ring plate is located at the fourth end. The frame plate is located between the upper ring plate and the lower ring plate. The upper ring plate includes an outer peripheral wall, and the lower ring plate includes an outer peripheral wall. The frame plate extends from the outer peripheral wall of the upper ring plate to the outer peripheral wall of the lower ring plate in the first direction.

10. The electrolysis unit as described in claim 9, characterized in that, The frame plate, the upper ring plate, and the lower ring plate are made of titanium. At least a portion of the outer wall of the frame plate is coated with an insulating material. The upper ring plate includes a first surface closer to the lower ring plate, and the lower ring plate includes a second surface closer to the upper ring plate. The first surface, the second surface, and the inner wall of the frame plate are coated with iridium-tantalum. A second space is formed between the first surface, the second surface, the inner wall of the frame plate, and the diaphragm.

11. The electrolysis unit according to any one of claims 1 to 10, characterized in that, It also includes an anode tab that extends from the outer wall of the frame plate.

12. An integrated module for an electrolysis unit, characterized in that, include: Multiple electrolysis units as described in any one of claims 1 to 11; The system includes a cathode liquid outlet main pipe and multiple cathode liquid outlet manifolds, wherein the multiple cathode liquid outlet manifolds are connected to the cathode liquid outlet main pipe, and each cathode liquid outlet manifold is connected to the cathode liquid outlet pipe of the electrolysis unit. The system includes a cathode liquid inlet main pipe and multiple cathode liquid inlet manifolds, wherein the multiple cathode liquid inlet manifolds are connected to the cathode liquid inlet main pipe, and each cathode liquid inlet manifold is connected to the cathode liquid inlet pipe of the electrolysis unit. The system includes a main anode outlet pipe and multiple anode outlet manifolds, wherein the multiple anode outlet manifolds are connected to the main anode outlet pipe, and each anode outlet manifold is connected to the anode outlet pipe of the electrolysis unit. The system includes a main anode inlet pipe and multiple anode inlet manifolds, wherein the multiple anode inlet manifolds are connected to the main anode inlet pipe, and each anode inlet manifold is connected to the anode inlet pipe of the electrolysis unit. Valves are provided on the cathode outlet manifold, the cathode inlet manifold, the anode outlet manifold, and the anode inlet manifold.

13. The integrated module as described in claim 12, characterized in that, Also includes: A cathode main line is provided, and multiple cathode rod connecting lines are connected to the cathode main line. Each cathode rod connecting line is electrically connected to the cathode rod of the electrolysis unit. The anode main line is electrically connected to multiple anode tab connecting lines, and each anode tab connecting line is electrically connected to the anode tab of the electrolysis unit. Both the cathode rod connecting line and the anode tab connecting line are equipped with switches.

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