Unit tank for square water electrolysis hydrogen production and hydrogen production device

Abstract

The utility model discloses a square water electrolysis hydrogen production unit groove which comprises a rectangular pole frame, a step ring groove is formed in the inner side of the rectangular pole frame, a pressing gasket, a partition plate and a plurality of pressing strips are sequentially arranged on the step ring groove from inside to outside, and the pressing strips are connected with the step ring groove in a locking mode through screws. Through holes are formed in the portions, corresponding to the screws, of the pressing gasket and the partition plate, and the multiple pressing strips are matched to form a pressing frame. The utility model further discloses an electrolysis device using the unit tank. The unit grooves are small in deformation and high in flatness, the hydrogen production device is good in sealing performance, and the preparation cost is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, and in particular to a square unit tank for water electrolysis hydrogen production and a hydrogen production device. Background Art

[0002] Among the traditional electrolyzers for hydrogen production by water electrolysis, circular electrolyzers are the most common, with fewer square electrolyzers. During the preparation process, the parts of the circular cell are all cut from rectangular raw materials, so there are more scraps from the edges. In addition, during installation and maintenance, the circular electrolyzer will be separated as a whole, and only after separation can one of the structures be replaced, which makes disassembly and assembly inconvenient.

[0003] Most of the existing square electrolytic cells use external flow channels, and the current will leak out along the external flow channels with the electrolyte, which leads to more leakage current, increased DC energy consumption, and affects gas purity; in addition, the pressure of the square cell is generally low pressure or normal pressure. There are also a small number of square electrolytic cells that use internal flow channels, but they are basically connected by welding partitions. Due to excessive welding heat, the square cell pole frame is greatly deformed, the assembly is difficult, and it is also easy to leak liquid. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a square unit cell for producing hydrogen by water electrolysis and a hydrogen production device, the unit cell has small deformation and high flatness, the hydrogen production device has good sealing performance, and the preparation cost is controlled.

[0005] In order to solve the above technical problems, the utility model provides a square unit cell for hydrogen production by water electrolysis, including a rectangular pole frame, a step ring groove is arranged on the inner side of the rectangular pole frame, and a clamping gasket, a partition and a plurality of clamping strips are arranged on the step ring groove from the inside to the outside in sequence, and the clamping strip is locked and connected to the step ring groove by screws, and the clamping gasket and the partition corresponding to the screws are provided with through holes, and the plurality of clamping strips cooperate to form a clamping frame.

[0006] Furthermore, the rectangular pole frame is provided with hanging ears on both sides of the top edge, and an insulating block is provided at the bottom of the hanging ears.

[0007] Furthermore, a plurality of flow holes are provided on the top and bottom sides of the rectangular pole frame, the partition plate and the rectangular pole frame cooperate to form a first chamber, the partition plate and the compression strip cooperate to form a second chamber, a first flow groove is provided between at least one flow hole on the top and bottom sides and the first chamber, a second flow groove is provided between at least one flow hole on the top and bottom sides and the second chamber, guide covers are provided on the first flow groove and the second flow groove, a first splicing groove is provided on the rectangular pole frame corresponding to the second flow groove, and a second splicing groove is provided on the compression strip corresponding to the second flow groove.

[0008] A hydrogen production device adopts the unit cell described above.

[0009] Furthermore, it includes a main frame, in which a fixed end pressure plate and a movable end pressure plate are arranged in parallel, a plurality of unit slots are arranged between the fixed end pressure plate and the movable end pressure plate, cathode side components, diaphragms and anode side components are arranged between adjacent unit slots, end cathode slot components and end anode slot components are respectively arranged between the fixed end pressure plate and adjacent unit slots and between the movable end pressure plate and adjacent unit slots, and the fixed end pressure plate and the movable end pressure plate are fixedly connected on their outer peripheries by fastening components.

[0010] Furthermore, two cross beams are arranged on the main frame, guide rails are arranged on the cross beams, support seats are arranged on both sides of the movable end pressure plates, insulating sliders are arranged at the bottom of the support seats, and the insulating sliders cooperate with the guide rails to guide the sliding.

[0011] Furthermore, the unit slot is provided with a support ear, and the unit slot is hung on two beams through the support ear.

[0012] Furthermore, the main frame is provided with a liquid inlet main pipe and a liquid outlet main pipe on both sides of the fixed end pressure plate and the movable end pressure plate, and a connecting hose is provided on the liquid inlet main pipe and the liquid outlet main pipe on one side of the movable end pressure plate, and the connecting hose is connected to the flow channel hole on the movable end pressure plate.

[0013] Furthermore, the fastening assembly includes a stud, an insulating sleeve is provided on the stud, and disc spring locking parts are provided at both ends of the stud.

[0014] Furthermore, an insulating seat is provided at the bottom of the main frame.

[0015] Beneficial effects of the utility model:

[0016] 1. The unit slot is connected by bolts to reduce the deformation of the pole frame and the partition caused by welding, making the whole flat, effectively enhancing the sealing effect, and facilitating the alignment of the flow channel holes.

[0017] 2. The square structure is used as the electrolytic cell, which has less scraps during preparation and effectively saves costs.

[0018] 3. Easy maintenance and disassembly. No need to return to the factory for maintenance. The unit tank can be directly repaired and replaced in the customer's factory, saving the later maintenance cost. The flow channel is located inside the electrolytic cell, the leakage current of the electrolytic cell is reduced, and the gas purity is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the unit slot of the utility model;

[0020] Figure 2 This utility model Figure 1 A partial structural enlarged schematic diagram;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the unit slot of the utility model;

[0022] Figure 4 This utility model Figure 3 A partial structural enlarged schematic diagram;

[0023] Figure 5 This is a schematic diagram of the structure of the hydrogen production device of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the main frame part of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the fastening assembly of the utility model. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1 As shown, an embodiment of a square unit cell for hydrogen production by water electrolysis of the utility model comprises a rectangular pole frame 1, a step ring groove 2 is arranged on the inner side of the rectangular pole frame, a clamping gasket 3, a partition 4 and a plurality of clamping strips 5 are arranged on the step ring groove from the inside to the outside, the clamping strip is locked and connected to the step ring groove by a screw 6, through holes are arranged on the clamping gasket and the partition corresponding to the screw, and the plurality of clamping strips cooperate to form a clamping frame.

[0028] Specifically, the compression gasket can be made of EPDM, chloroprene rubber and other materials, and is clamped and fixed between the compression strip and the step ring groove by a plurality of compression strips and screws, and the compression gasket and the partition are compressed between the partition and the step ring groove, thereby achieving a good sealing effect between the partition and the step ring groove. The screws pass through the through holes on the compression gasket and the partition, and also have a good positioning effect. The rectangular pole frame is welded by 4 frames, which has a thickness of 1-1.2cm. After welding, it has good strength and will not deform. The partition is thin. Although it can meet the isolation and fixing requirements after welding, the deformation will be large. Therefore, after fixing with the compression strip and screws, the problem of welding deformation can be effectively solved, thereby reducing the deformation of the pole frame and the partition caused by welding, and ensuring that there is no leakage risk in the cathode / anode chamber space on both sides of the partition.

[0029] In order to facilitate the convenient disassembly of the square structure electrolytic cell, hanging ears 7 are provided on both sides of the top edge of the rectangular pole frame, and insulating blocks 8 are provided at the bottom of the hanging ears. The unit cell can be hung and positioned through the hanging ears. During the disassembly process, the unit cell is mounted and will not fall, which is convenient for moving and selecting the position that needs to be replaced.

[0030] In order to cooperate with the operation mode of the inner flow channel of the square structure electrolytic cell, a plurality of flow holes 9 are arranged on the top and bottom sides of the rectangular pole frame, the partition plate and the rectangular pole frame cooperate to form a first chamber, the partition plate and the compression strip cooperate to form a second chamber, the first chamber and the second chamber are the cathode chamber and the anode chamber, at least one flow hole on the top and bottom sides is provided with a first flow slot 10 between the first chamber, at least one flow hole on the top and bottom sides is provided with a second flow slot 11 between the second chamber, for example, the first flow slot is located in the cathode chamber, then The first flow groove located on the bottom edge is used for the inflow of alkali solution into the cathode chamber, the first flow groove located on the top edge is used for the outflow of alkali solution and gas into the cathode chamber, and the second flow groove is in the anode chamber, the second flow groove located on the bottom edge is used for the inflow of alkali solution into the cathode chamber, and the second flow groove located on the top edge is used for the outflow of alkali solution and gas into the cathode chamber; in summary, among the above multiple flow holes, the flow hole provided with the first flow groove may not be provided with the second flow groove, so as to realize the isolated supply of alkali solution in the cathode chamber and the anode chamber, avoid the risk of gas mixing inside the alkali solution, and operate more stably.

[0031] A guide cover plate 12 is provided on both the first flow channel and the second flow channel to improve the sealing effect. Since a compression strip is provided, a first splicing groove 13 is provided on the rectangular pole frame corresponding to the second flow channel, and a second splicing groove 14 is provided on the compression strip corresponding to the second flow channel. The first splicing groove and the second splicing groove are connected to form a second flow channel.

[0032] The present application also discloses a hydrogen production device, which adopts the above-mentioned unit cell 15, and the unit cell surface has high flatness. Specifically, it includes a main frame 16, in which a fixed end pressure plate 17 and a movable end pressure plate 18 are arranged in parallel, a plurality of unit cells are arranged between the fixed end pressure plate and the movable end pressure plate, a cathode side component, a diaphragm and an anode side component are arranged between adjacent unit cells, an end cathode cell component 19 and an end anode cell component 20 are respectively arranged between the fixed end pressure plate and the adjacent unit cell and between the movable end pressure plate and the adjacent unit cell. In the above structure, mainly between the fixed end pressure plate and the movable end pressure plate, the end cathode slot assembly (including end gasket, insulating plate, end gasket, end cathode slot, cathode gasket) diaphragm, anode gasket, unit slot, cathode gasket, diaphragm, anode gasket, unit slot, cathode gasket, diaphragm, end anode slot assembly (anode gasket, end plate anode slot, end gasket, insulating plate, end gasket) are placed in sequence, and finally the fixed end pressure plate and the movable end pressure plate are fixedly connected by a fastening assembly 21 on the periphery to form a sealed electrolytic cell.

[0033] Two crossbeams 22 are arranged on the main frame, and guide rails 23 are arranged on the crossbeams. Support seats 24 are arranged on both sides of the movable end pressure plate. An insulating slider is arranged at the bottom of the support seat. The insulating slider cooperates with the guide rails to guide and slide, so as to achieve the clamping effect of the movable end pressure plate toward the fixed end pressure plate. The unit tank, the end cathode tank and the end plate anode tank are all provided with hanging ears. The hanging ears are placed on the guide rails of the electrolytic cell bracket, which play a supporting and positioning role and also have a sliding effect, so that the overall structure can be kept integrated during the disassembly process, and a unit tank can be taken separately.

[0034] A liquid inlet manifold 26 and a liquid outlet manifold 27 are provided on both sides of the fixed end pressure plate and the movable end pressure plate of the main frame. A connecting hose 28 is provided on the liquid inlet manifold and the liquid outlet manifold on one side of the movable end pressure plate. The connecting hose is connected to the flow channel hole on the movable end pressure plate to ensure that the pipeline can move adaptively during the movement of the movable end pressure plate. An insulating seat 32 is provided at the bottom of the main frame to avoid leakage. The fastening assembly includes a stud 29, an insulating sleeve 30 is provided on the stud, and disc spring locking parts 31 are provided at both ends of the stud to provide effective fixing ability while ensuring insulation effect.

[0035] Before entering work, the alkali solution passes through two liquid inlet pipes (anode liquid inlet pipe and cathode liquid inlet pipe) and corresponding branch pipes, enters the anode chamber and cathode chamber of each unit tank respectively, and escapes from the two liquid outlet pipes (anode liquid outlet pipe and cathode liquid outlet pipe) respectively to ensure that there is no gas in the unit tank.

[0036] Subsequently, the hydrogen production device is powered on and gradually enters the working state. The alkali solution undergoes an oxidation reaction in the anode chamber to produce oxygen. As the gas floats, the oxygen and part of the alkali solution flow out of the unit tank and enter the anode liquid outlet main pipe. The alkali solution undergoes a reduction reaction in the cathode chamber to produce hydrogen. The hydrogen and part of the alkali solution flow out of the unit tank and enter the cathode liquid outlet main pipe. The diaphragm between the cathode chamber and the anode chamber is used to isolate hydrogen and oxygen, and through the hydrophilicity of the diaphragm, the hydroxide ions migrate to complete the entire redox reaction.

[0037] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A square unit cell for producing hydrogen by water electrolysis, characterized in that: It comprises a rectangular pole frame, the inner side of which is provided with a step ring groove, the step ring groove is provided with a clamping gasket, a partition and a plurality of clamping strips in sequence from the inside to the outside, the clamping strips are locked and connected to the step ring groove by screws, the clamping gasket and the partition corresponding to the screws are provided with through holes, and the plurality of clamping strips cooperate to form a clamping frame.

2. The square unit cell for producing hydrogen by water electrolysis according to claim 1, characterized in that: The rectangular pole frame is provided with hanging ears on both sides of the top edge, and an insulating block is provided at the bottom of the hanging ears.

3. The square unit cell for producing hydrogen by water electrolysis according to claim 1, characterized in that: A plurality of flow holes are arranged on the top and bottom sides of the rectangular pole frame, the partition plate cooperates with the rectangular pole frame to form a first chamber, the partition plate cooperates with the compression strip to form a second chamber, a first flow groove is arranged between at least one flow hole on the top and bottom sides and the first chamber, a second flow groove is arranged between at least one flow hole on the top and bottom sides and the second chamber, flow guide covers are arranged on the first flow groove and the second flow groove, a first splicing groove is arranged on the rectangular pole frame corresponding to the second flow groove, and a second splicing groove is arranged on the compression strip corresponding to the second flow groove.

4. A hydrogen production device, characterized in that: The unit slot as claimed in claim 3 is used.

5. The hydrogen production device according to claim 4, characterized in that: It comprises a main body frame, in which a fixed end pressure plate and a movable end pressure plate are arranged in parallel, a plurality of unit slots are arranged between the fixed end pressure plate and the movable end pressure plate, cathode side components, diaphragms and anode side components are arranged between adjacent unit slots, end cathode slot components and end anode slot components are arranged between the fixed end pressure plate and adjacent unit slots and between the movable end pressure plate and adjacent unit slots respectively, and the fixed end pressure plate and the movable end pressure plate are fixedly connected on their outer peripheries by fastening components.

6. The hydrogen production device according to claim 5, characterized in that: The main frame is provided with two cross beams, the cross beams are provided with guide rails, the movable end pressure plates are provided with support seats on both sides of the cross beams, the bottom of the support seats is provided with insulating sliders, and the insulating sliders cooperate with the guide rails to guide the sliding.

7. The hydrogen production device according to claim 6, characterized in that: The unit slot is provided with a support ear, and the unit slot is hung on two cross beams through the support ear.

8. The hydrogen production device according to claim 5, characterized in that: The main frame is provided with a liquid inlet main pipe and a liquid outlet main pipe on both sides of the fixed end pressure plate and the movable end pressure plate. The liquid inlet main pipe and the liquid outlet main pipe on one side of the movable end pressure plate are provided with connecting hoses, and the connecting hoses are connected to the flow channel holes on the movable end pressure plate.

9. The hydrogen production device according to claim 5, characterized in that: The fastening assembly comprises a stud, an insulating sleeve is sleeved on the stud, and disc spring locking parts are arranged at both ends of the stud.

10. The hydrogen production device according to claim 5, characterized in that: An insulating seat is arranged at the bottom of the main frame.

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