Multi-stage-plate small-polar-distance ground vanadium electrolysis device

Abstract

The utility model discloses a multi-stage plate small polar distance earth vanadium electrolysis device, which comprises a first hydraulic fixing plate and a second hydraulic fixing plate, the second hydraulic fixing plate is arranged on one side of the first hydraulic fixing plate, a cathode tank is fixed on the inner side of the first hydraulic fixing plate, and a first cathode plate and a second cathode plate are sequentially and fixedly connected to the inner wall of the cathode tank. An anode groove is fixed to the inner side of the second hydraulic fixing plate, a first anode plate, a second anode plate and a first cathode plate are fixedly connected to the inner wall of the anode groove in sequence, the upper ends of the first cathode plate and the second cathode plate are sleeved with cathode conducting rods, and the upper ends of the first anode plate and the second anode plate are sleeved with anode conducting rods. According to the utility model, a plurality of cathode plates and anode plates are arranged at small polar distances, so that the effective area of electrolytic reaction is obviously increased, the energy utilization rate is improved, the concentration polarization is reduced, the electrolytic efficiency is further improved, the volume of the electrolytic tank is more compact, the daily maintenance and management are convenient, and the long-term stable and efficient operation of the device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vanadium electrolysis, in particular to a multi-stage plate and small-pole-distance vanadium electrolysis device. Background Art

[0002] Vanadium electrolysis refers to the electrolysis process using vanadium as the active substance. It is mainly used in all-vanadium liquid flow energy storage systems. Vanadium electrolyte is the core of all-vanadium liquid flow energy storage systems. It is directly related to the energy transmission efficiency of the entire system and determines the performance of the entire battery.

[0003] Currently, there are two main methods for producing vanadium electrolytes: chemical and electrolytic. The chemical method uses chemical reduction or oxidation reactions to produce solutions of vanadium ions in various valence states. This method typically uses chemical reducing agents (such as hydrogen and sulfur dioxide) to reduce vanadium from a higher oxidation state to a valence of 4. However, it is difficult to precisely control the valence ratio of vanadium ions, resulting in poor stability of the resulting electrolyte, making it difficult to meet the needs of large-scale industrial production. The electrolytic method, on the other hand, precisely regulates the valence of vanadium ions by controlling the current, voltage, and electrolyte flow rate, directly reducing vanadium from a higher oxidation state to a valence of 3.5. This electrolytic method is suitable for industrial production, with minimal side reactions and high electrolyte purity, meeting the needs of large-scale vanadium battery applications.

[0004] After searching, the authorization publication number CN202320189043.3 discloses a vanadium electrolyte diaphragm electrolysis device. Although it has certain technical advantages, it still has some obvious shortcomings. First, the device adopts a unipolar plate design, which results in a small effective reaction area of ​​the electrode, low electrolysis efficiency, and insufficient energy utilization. Secondly, the inter-electrode spacing is large, which increases the transmission distance of ions in the electrolyte, resulting in an increase in internal resistance, thereby increasing energy consumption. In addition, the unipolar plate and large inter-electrode spacing design make the device larger and take up more space, which limits its application scalability in large-scale industrial production, and the electrolyte flow is uneven, which easily leads to uneven reaction and affects the stability of product quality.

[0005] Authorization publication numbers CN202321263814.5 and CN202222824111.7 disclose a vanadium electrolyte preparation device. Although the replacement and maintenance of the electrolysis device are relatively simple, there are still some shortcomings in practical applications. First, the design of the device allows the flow of the electrolyte to directly impact the ion membrane, causing the ion membrane to be subjected to stress and tearing when impacted by the liquid. This long-term mechanical stress may cause the ion membrane to lose more and shorten its service life. Secondly, damage to the membrane will not only increase the maintenance frequency and replacement cost of the equipment, but may also affect the quality of the electrolyte and the electrolysis efficiency, resulting in unstable battery performance.

[0006] Therefore, it is necessary to provide a vanadium electrolysis device that can solve the above-mentioned drawbacks and improve the use effect. Utility Model Content

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The utility model discloses a multi-stage plate small-pole-distance vanadium electrolysis device, comprising a first hydraulic fixed plate and a second hydraulic fixed plate, wherein the second hydraulic fixed plate is provided on one side of the first hydraulic fixed plate, and a cathode slot is fixed on the inner side of the first hydraulic fixed plate, and the inner wall of the cathode slot is fixedly connected with the first cathode plate and the second cathode plate in sequence, an anode slot is fixed on the inner side of the second hydraulic fixed plate, and the inner wall of the anode slot is fixedly connected with the first anode plate and the second anode plate in sequence, an ion membrane fixing frame is provided on the inner side of the second cathode plate and the second anode plate, and an ion exchange membrane is fixed in the middle of the ion membrane fixing frame, a cathode conductive rod is sleeved on the upper ends of the first cathode plate and the second cathode plate, and an anode conductive rod is sleeved on the upper ends of the first anode plate and the second anode plate.

[0009] Furthermore, the outer sides of the first hydraulic fixing plate and the second hydraulic fixing plate are threadedly fixed to the output end of the hydraulic cylinder.

[0010] Furthermore, the first cathode plate, the second cathode plate, the first anode plate, and the second anode plate are all arranged in multiple equal intervals with a small pitch.

[0011] Furthermore, the cathode tank and the anode tank are circulation tanks.

[0012] Furthermore, the outer surfaces of the cathode conductive rod and the anode conductive rod are uniformly coated with an anti-corrosion coating.

[0013] Furthermore, an exhaust port is provided at the upper end of one side of the cathode tank and the anode tank, and a shaft seat is provided inside the exhaust port, an internal threaded pipe is provided inside the middle part of the shaft seat, and an external threaded pipe is threaded on the outer surface of the internal threaded pipe, a connecting ring is fixed on one side of the outer surface of the shaft seat, and the connecting ring is threadedly connected to the front face of the cathode tank and the anode tank through connecting bolts equidistantly passing through the middle.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model adopts multiple, small-pole spacing settings between the cathode plates and the anode plates, which significantly increases the effective area of ​​the electrolysis reaction, improves energy utilization, reduces concentration polarization, and thus improves the electrolysis efficiency, and makes the volume of the electrolytic cell more compact, which is convenient for daily maintenance and management, ensuring long-term stable and efficient operation of the device; at the same time, the hydrogen and oxygen generated in the cathode tank and the anode tank are transported to the outside and react with the alkaline solution to achieve harmless treatment and reduce pollution to the environment; and the outer surfaces of the cathode plates, anode plates, cathode conductive rods and anode conductive rods are coated with an anti-corrosion coating, which can increase corrosion resistance, extend service life and reduce costs.

[0016] 2. Based on the above beneficial effects, when the exhaust port is used to discharge the generated oxygen and hydrogen to the outside, the internal threaded pipe and the external threaded pipe with threaded layout are connected to the external delivery pipeline. While ensuring a tight connection, the length can be adjusted and it is convenient to use. The shaft seat setting can meet the rotation requirements during disassembly and assembly, avoiding bending of the external delivery pipeline during disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is the appearance diagram of the utility model;

[0019] Figure 2 This is the assembly view of the cathode plate and anode plate of the utility model;

[0020] Figure 3 This is the assembly view of the external threaded pipe of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] In the figure: 1. First hydraulic fixing plate; 2. Cathode tank; 21. Exhaust port; 22. Shaft seat; 23. Connecting ring; 24. Connecting bolt; 25. Internal threaded pipe; 26. External threaded pipe; 3. First cathode plate; 4. Second cathode plate; 5. Ion membrane fixing frame; 6. Second anode plate; 7. First anode plate; 8. Anode tank; 9. Second hydraulic fixing plate; 10. Anode conductive rod; 11. Cathode conductive rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0025] See also Figure 1-3As shown, the utility model is a multi-stage plate small-pole-distance vanadium electrolysis device, comprising a first hydraulic fixed plate 1 and a second hydraulic fixed plate 9, a second hydraulic fixed plate 9 being provided on one side of the first hydraulic fixed plate 1, and a cathode tank 2 being fixed on the inner side of the first hydraulic fixed plate 1, a first cathode plate 3 and a second cathode plate 4 being fixedly connected to the inner wall of the cathode tank 2 in sequence, an anode tank 8 being fixed on the inner side of the second hydraulic fixed plate 9, and a first anode plate 7 and a second anode plate 6 being fixedly connected to the inner wall of the anode tank 8 in sequence, an ion membrane fixing frame 5 being provided on the inner side of the second cathode plate 4 and the second anode plate 6, and an ion exchange membrane being fixed in the middle of the ion membrane fixing frame 5, a cathode conductive rod 11 being sleeved on the upper ends of the first cathode plate 3 and the second cathode plate 4, and an anode conductive rod 10 being sleeved on the upper ends of the first anode plate 7 and the second anode plate 6;

[0026] The first hydraulic fixing plate 1 and the second hydraulic fixing plate 9 are screw-fixed to the outer sides of the hydraulic cylinder output end;

[0027] The first hydraulic fixing plate 1 and the second hydraulic fixing plate 9 are acted upon by an external hydraulic cylinder to fix the cathode tank 2 and the anode tank 8 and ensure the stability and sealing of the connection; the cathode tank 2 and the anode tank 8 are used for fixing the structures of the first cathode plate 3, the second cathode plate 4, the second anode plate 6 and the second anode plate 6 respectively, and are provided with a cathode liquid and an anode liquid respectively inside, the cathode liquid is a vanadium electrolyte, and the anode liquid is a dilute sulfuric acid solution, which are used for the electrolytic reaction of the cathode and the anode respectively, and are sealed by a corrosion-resistant gasket made of materials such as polytetrafluoroethylene to effectively prevent electrolysis. Liquid leakage is prevented to maintain the air tightness of the cell body; the first cathode plate 3, the second cathode plate 4, the first anode plate 7 and the second anode cooperate with each other in the electrolysis reaction, and through the redox reaction, realize the process of converting electrical energy into chemical energy or converting one chemical substance into another chemical substance; the anode conductive rod 10 and the cathode conductive rod 11 are used to introduce power into the electrodes in the electrolytic cell, and are made of copper to ensure stable current transmission; the ion membrane fixing frame 5 is located between the cathode cell 2 and the anode cell 8, and is used to fix the ion exchange membrane, ensure the isolation of the electrolyte of the anode and cathode, and allow ions to pass freely.

[0028] The cathode tank 2 and the anode tank 8 are circulation tanks;

[0029] The circulation tanks are used for the cathode liquid and the anode liquid respectively, so that the liquid can be circulated and processed, and a bottom-in and top-out mode is realized, which effectively reduces the influence of concentration polarization and thus improves the electrolysis efficiency. The two tanks are set to have uneven flow rates, which effectively reduces the temperature rise of the electrolytic cell.

[0030] The outer surfaces of the cathode conductive rod 11 and the anode conductive rod 10 are uniformly coated with an anti-corrosion coating;

[0031] Anti-corrosion coating ensures the corrosion resistance of the structure and reduces maintenance costs.

[0032] An exhaust port 21 is provided at the upper end of one side of the cathode tank 2 and the anode tank 8, and a shaft seat 22 is sleeved inside the exhaust port 21. An internally threaded pipe 25 is sleeved inside the middle of the shaft seat 22, and an externally threaded pipe 26 is threaded on the outer surface of the internally threaded pipe 25. A connecting ring 23 is fixed to one side of the outer surface of the shaft seat 22, and the connecting ring 23 is threadedly connected to the front of the cathode tank 2 and the anode tank 8 via connecting bolts 24 equidistantly passing through the middle.

[0033] The exhaust port 21 discharges the hydrogen and oxygen generated in the cathode tank 2 and the anode tank 8 to the outside. The connecting ring 23 is used in conjunction with the connecting bolts 24 to install the shaft seat 22. The shaft seat 22 can rotate at multiple angles to avoid bending of the connected delivery pipeline during disassembly and assembly. The internal threaded pipe 25 is then connected through the shaft seat 22. An external threaded pipe 26 is provided on the outer surface of the internal threaded pipe 25. While ensuring the connection to the external delivery pipeline, the length can be adjusted.

[0034] Working principle: After fixing the cathode tank 2 on the inner side of the first hydraulic fixed plate 1, the anode tank 8 is also fixed on the inner side of the second hydraulic fixed plate 9, and the first cathode plate 3 and the second cathode plate 4 are fixedly arranged with equidistant small pole pitch in the cathode tank 2, and the first anode plate 7 and the second anode plate 6 are fixedly arranged with equidistant small pole pitch in the anode tank 8. At this time, the first hydraulic fixed plate 1 and the second hydraulic fixed plate 9 can be brought inward and fit with both sides of the ion membrane fixed frame 5 in the middle, and an ion exchange membrane is fixed in the middle of the ion membrane fixed frame 5, and corrosion-resistant gaskets are embedded in the connection between the three to ensure the sealing of the connection. At the same time, the first hydraulic fixed plate 1 and the second hydraulic fixed plate 9 are respectively fixed to the output end of the external hydraulic cylinder, and the inlet and outlet of the circulation tank in the cathode tank 2 and the anode tank 8 are respectively sleeved with the input and output ends of the external circulation pump, and then the anode conductive rod 10 and the cathode conductive rod 11 are respectively sleeved with the positive and negative poles of the rectifier.

[0035] This solution adopts multiple, small-pole spacing settings between the cathode plates and the anode plates, which significantly increases the effective area of ​​the electrolysis reaction, improves energy utilization, reduces concentration polarization, and thus improves the electrolysis efficiency. It also makes the volume of the electrolytic cell more compact, facilitates daily maintenance and management, and ensures long-term stable and efficient operation of the device; at the same time, the hydrogen and oxygen generated in the cathode tank 2 and the anode tank 8 are transported to the outside and react with the alkaline solution to achieve harmless treatment, reducing pollution to the environment; and the outer surfaces of the cathode plates, anode plates, cathode conductive rods 11 and anode conductive rods 10 are coated with an anti-corrosion coating, which can increase corrosion resistance, extend service life, and reduce costs.

[0036] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage plate small-pole-distance vanadium electrolysis device, characterized in that: The invention comprises a first hydraulic fixing plate (1) and a second hydraulic fixing plate (9), wherein the first hydraulic fixing plate (1) is provided with the second hydraulic fixing plate (9) on one side, and a cathode tank (2) is fixed on the inner side of the first hydraulic fixing plate (1), and the inner wall of the cathode tank (2) is fixedly connected with a first cathode plate (3) and a second cathode plate (4) in sequence, an anode tank (8) is fixed on the inner side of the second hydraulic fixing plate (9), and the inner wall of the anode tank (8) is fixedly connected with a first anode plate (7) and a second anode plate (6) in sequence, an ion membrane fixing frame (5) is provided on the inner side of the second cathode plate (4) and the second anode plate (6), and an ion exchange membrane is fixed on the ion membrane fixing frame (5), and the upper ends of the first cathode plate (3) and the second cathode plate (4) are sleeved with a cathode conductive rod (11), and the upper ends of the first anode plate (7) and the second anode plate (6) are sleeved with an anode conductive rod (10).

2. The multi-stage plate small-pole-gap vanadium electrolysis device according to claim 1, characterized in that: The outer sides of the first hydraulic fixing plate (1) and the second hydraulic fixing plate (9) are threadedly fixed to the output end of the hydraulic cylinder.

3. The multi-stage plate small-pole-distance vanadium electrolysis device according to claim 1, characterized in that: The first cathode plate (3), the second cathode plate (4), the first anode plate (7), and the second anode plate (6) are all arranged in multiple equal intervals with a small pole pitch.

4. The multi-stage plate small-pole-gap vanadium electrolysis device according to claim 1, characterized in that: The cathode tank (2) and the anode tank (8) are circulation tanks.

5. The multi-stage plate small-pole-gap vanadium electrolysis device according to claim 1, characterized in that: The outer surfaces of the cathode conductive rod (11) and the anode conductive rod (10) are uniformly coated with an anti-corrosion coating.

6. The multi-stage plate small-pole-distance vanadium electrolysis device according to claim 1, characterized in that: An exhaust port (21) is provided at the upper end of one side of the cathode tank (2) and the anode tank (8), and a shaft seat (22) is sleeved inside the exhaust port (21); an internal threaded pipe (25) is sleeved inside the middle of the shaft seat (22), and an external threaded pipe (26) is threaded on the outer surface of the internal threaded pipe (25); a connecting ring (23) is fixed on one side of the outer surface of the shaft seat (22), and the connecting ring (23) is threadedly connected to the front of the cathode tank (2) and the anode tank (8) through connecting bolts (24) equidistantly passing through the middle.

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