Peripherally-fastened alkaline water electrolytic bath

Abstract

The invention relates to the technical field of alkaline water hydrogen production electrolytic cells, in particular to a periphery-fastened alkaline water hydrogen production electrolytic cell which is formed by combining polar plates, middle polar plates, end polar plates, end pressing plates, gaskets, tension bolts, disc springs and fastening nuts. A rigid fastening reinforcing structure used for limiting bending or twisting deformation of the electrolytic cell body so as to keep the straightness of the electrolytic cell body is additionally arranged on the periphery of the electrolytic cell body for hydrogen production from alkaline water. According to the invention, the peripheral rigid fastening and reinforcing structure is additionally arranged on the original electrolytic cell, so that the displacement of the electrolytic cell caused by thermal expansion and cold contraction in the use process is forcibly limited in a stable area, and the cell body can be effectively prevented from bending, twisting or dislocation; and the high straightness and structural integrity of the electrolytic cell in the whole operation process are ensured, so that the operation reliability of the electrolytic cell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alkaline water hydrogen production electrolyzer, and particularly relates to an alkaline water hydrogen production electrolyzer fastened peripherally. BACKGROUND

[0002] The alkaline water hydrogen production electrolyzer is a device for preparing hydrogen by alkaline water electrolysis. The existing electrolyzer structure is mainly a circular pressure electrolyzer. The circular pressure alkaline water hydrogen production electrolyzer is composed of a plurality of plate assemblies by stacking and assembling, and forms a series structure composed of a plurality of electrolytic cells. A sealing gasket is arranged between adjacent plate assemblies. The plate at both ends and / or the middle of the plate assembly for connecting the power supply and / or the medium inlet and outlet is called an end plate and / or a middle plate. In order to ensure that the plate assembly does not leak under pressure, end pressure plates are arranged at both ends of the plate assembly, and are locked by tension bolts, disc springs and locking nuts.

[0003] The large electrolyzer is composed of at least 100 plate assemblies and gaskets. Since the gasket material has elasticity and softness, during the manufacturing process of plate stacking and locking, and during the use process of temperature rise and fall and pressure increase and decrease, the gasket will change in a series of changes such as compression, rebound and creep under the influence of temperature and pressure changes, and the size of the electrolyzer will also change, thereby causing the deformation, distortion and bending of the electrolyzer body. These deformations will cause the forces on the gaskets at different positions to be different, and the gasket parts with large forces will produce large creep deformation, causing the plate to spit out (i.e. the plate is misaligned and protrudes to one side of the periphery of the electrolyzer body), and the sealing reliability of the gasket parts with small forces is reduced. Long-term repeated creep deformation causes the electrolyzer to bend and distort quickly. Repeating this process, the gasket is also quickly damaged and spit out. More spit out of the gasket causes the electrolyzer to lose sealing, causing the alkaline solution to leak, and the electrolyzer to be scrapped. SUMMARY

[0004] In order to solve the above problems, the present application provides an alkaline water electrolyzer fastened peripherally, which aims to increase the peripheral rigid fastening reinforcement structure of the original electrolyzer, so that the displacement caused by thermal expansion and cold contraction during use is forced to be limited in a stable area, thereby maintaining the flatness of the electrolyzer body. The specific technical scheme is as follows: An alkaline water electrolyzer fastened peripherally, the alkaline water hydrogen production electrolyzer is composed of a plate, a middle plate, an end plate, an end pressure plate, a gasket, a tension bolt, a disc spring and a locking nut, and a rigid fastening reinforcement structure for limiting the bending or distortion of the electrolyzer body and maintaining the flatness of the electrolyzer body is arranged peripherally on the body of the alkaline water hydrogen production electrolyzer.

[0005] Preferably, the rigid fastening and reinforcing structure comprises a plurality of rigid limiters fixedly arranged on the periphery of the electrolytic cell body, which are dispersedly arranged on the periphery of the electrolytic cell body and arranged in gaps or abut against the outer circles of the respective electrode plates on the electrolytic cell body, thereby forming radial limitation for the respective electrode plates in the electrolytic cell body.

[0006] Further, the rigid limiters adopt rigid profiles, which are selected from H-shaped steel, I-shaped steel, round steel, steel pipe or other rigid profiles.

[0007] In the present application, the outer part of the tensioning bolt is wrapped with an insulating material, and the insulating material is selected from glass fiber reinforced plastic, polypropylene, polytetrafluoroethylene or other insulating materials.

[0008] In the present application, an insulating structure made of insulating material is arranged between the rigid fastening and reinforcing structure and the electrolytic cell body, which can ensure that the electrolytic cell body and the rigid fastening and reinforcing structure are not conductive, and the rigid fastening and reinforcing structure and the tensioning bolt are arranged in gaps or abut against each other.

[0009] Further, the insulating structure between the rigid fastening and reinforcing structure and the electrolytic cell body is designed as a slidable structure or a slidable material.

[0010] Preferably, an insulating material coating is arranged on the outer surface of the rigid fastening and reinforcing structure, so that the surface of the rigid fastening and reinforcing structure has good insulating property.

[0011] As one of the preferred installation modes of the rigid fastening and reinforcing structure in the present application, the rigid limiters in the rigid fastening and reinforcing structure adopt a bracket type installation structure, which comprises a pair of annular rigid brackets arranged at the two end parts on the periphery of the electrolytic cell body, and the two ends of each rigid limiter are connected between the pair of annular rigid brackets.

[0012] The bracket type installation structure is a whole independent structure arranged on the periphery of the electrolytic cell body, which does not need to be connected with the end pressure plates at the two ends of the electrolytic cell, and only needs to be arranged in gaps or abut against the outer circles of the electrode plates through the insulating structure between the rigid limiters and the outer circles of the electrode plates, so as to allow the electrolytic cell to normally expand and contract in the longitudinal direction, and simultaneously play a role of radial limitation for the electrode plates.

[0013] As the second preferred installation mode of the rigid fastening and reinforcing structure in the present application, the rigid limiters in the rigid fastening and reinforcing structure adopt an end pressure plate installation structure, which connects the two ends of each rigid limiter with the end pressure plates at the two ends of the electrolytic cell through fastening connectors.

[0014] Preferably, the rigid limiting member and the fastening connecting member in the rigid fastening reinforcing structure are designed in a slidable or rolling structure.

[0015] Preferably, when the length of the electrolytic cell is long, the rigid fastening reinforcing structure further comprises one or more reinforcing hoops arranged at the middle part of the periphery of the electrolytic cell body, and each rigid limiting member is fixedly connected with the reinforcing hoops.

[0016] Preferably, the number of the rigid limiting members is four, each rigid limiting member is arranged along the longitudinal direction of the electrolytic cell body, and the four rigid limiting members are uniformly arranged in the circumferential direction.

[0017] The beneficial effects of the present application are: First, the peripheral fastening alkaline water electrolytic cell of the present application increases the rigid fastening reinforcing structure in the periphery of the original electrolytic cell, so that the overall expansion and contraction and the thermal expansion and contraction displacement of each plate are forced to be limited in a stable area, thereby effectively preventing the cell body from bending, twisting or mispositioning, ensuring that the electrolytic cell maintains high flatness and structural integrity during the entire operation process, and improving the reliability of the electrolytic cell operation.

[0018] Second, the peripheral fastening alkaline water electrolytic cell of the present application, by arranging the rigid fastening reinforcing structure, effectively reduces the bending or twisting deformation of the electrolytic cell body, so that the stress on the gasket between the plates is more uniform, avoiding local stress concentration to cause excessive creep or ejection of the gasket, thereby significantly improving the long-term sealing effect of the sealing gasket, reducing the risk of caustic leakage, and prolonging the service life of the electrolytic cell.

[0019] Third, the peripheral fastening alkaline water electrolytic cell of the present application, for large-scale multi-plate electrolytic cells, the rigid fastening reinforcing structure can effectively suppress the dimensional changes caused by gasket elastic recovery and material creep during the manufacturing process and use conditions (such as temperature rise and fall, pressure increase and decrease) of the plate stacking and locking, maintain consistent spacing between electrolytic cells, and improve the operation stability.

[0020] Fourth, the peripheral fastening alkaline water hydrogen production electrolytic cell of the present application, the rigid fastening reinforcing structure and the electrolytic cell body are connected in an insulating manner, which not only realizes mechanical constraint but also does not affect the electrical isolation requirement of the electrolytic cell, avoiding the risk of short circuit or electric leakage.

[0021] Fifth, the peripheral fastening alkaline water hydrogen production electrolyzer, the slidable design of the insulating structure between the rigid fastening reinforcing structure and the electrolyzer body, and the slidable or rolling structure design between the rigid limiting piece and the fastening connecting piece in the rigid fastening reinforcing structure, are beneficial to releasing normal electrolyzer longitudinal thermal expansion and cold contraction deformation, and limiting electrolyzer body harmful radial bending or twisting deformation, so that the long-term operation reliability and service life of the entire electrolyzer equipment under thermal cycle and pressure cycle can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the prior art alkaline water hydrogen production electrolyzer; Figure 2 is a structural schematic diagram of a peripheral fastening alkaline water electrolyzer of the present application (the rigid fastening reinforcing structure adopts a bracket type mounting connection structure); Figure 3 is an A-A view of Figure 2 ; Figure 4 is a structural schematic diagram of another peripheral fastening alkaline water electrolyzer of the present application (the rigid fastening reinforcing structure adopts an end pressure plate mounting connection structure); Figure 5 is a B-B view of Figure 4 .

[0023] In the figure: 1, fastening nut, 2, disc spring, 3, tension bolt, 4, polar plate, 5, gasket, 6, intermediate polar plate, 7, end polar plate, 8, end pressure plate, 9, rigid fastening reinforcing structure, 10, rigid limiting piece (profile), 11, annular rigid bracket, 12, fastening connecting piece. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0025] As Figures 1 to 5 shown is an embodiment of a peripheral fastening alkaline water electrolyzer of the present application, the alkaline water hydrogen production electrolyzer is composed of polar plates 4, intermediate polar plates 6, end polar plates 7, end pressure plates 8, gaskets 5, tension bolts 3, disc springs 2, and fastening nuts 1, and a rigid fastening reinforcing structure 9 for limiting electrolyzer body bending or twisting deformation and maintaining electrolyzer body flatness is arranged on the periphery of the electrolyzer body.

[0026] Preferably, the rigid fastening reinforcing structure 9 comprises a plurality of rigid limiters 10 fixedly arranged on the periphery of the electrolytic cell body, which are dispersedly arranged on the periphery of the electrolytic cell body and arranged in gaps or abut against the outer circles of the respective polar plates 4 on the electrolytic cell body, thereby forming radial limitation for the respective polar plates 4 in the electrolytic cell body.

[0027] Further, the rigid limiter 10 adopts a rigid profile, which is selected from H-shaped steel, I-shaped steel, round steel, steel pipe or other rigid profiles.

[0028] In the embodiment, the external part of the tensioning bolt 3 is wrapped with an insulating material, and the insulating material is selected from glass fiber reinforced plastic, polypropylene, polytetrafluoroethylene or other insulating materials.

[0029] In the embodiment, an insulating structure is arranged between the rigid fastening reinforcing structure 9 and the electrolytic cell body, which is made of insulating material and can ensure that the electrolytic cell body and the rigid fastening reinforcing structure 9 are not conductive, and the rigid fastening reinforcing structure 9 and the tensioning bolt 3 are arranged in gaps or abut against each other.

[0030] Further, the insulating structure between the rigid fastening reinforcing structure 9 and the electrolytic cell body is designed as a slidable structure or made of slidable material.

[0031] Preferably, the rigid fastening reinforcing structure 9 is provided with an insulating material coating on the outer surface, so that the surface of the rigid fastening reinforcing structure 9 has good insulating property.

[0032] As one of the preferred solutions of the installation mode of the rigid fastening reinforcing structure in the embodiment, the rigid limiter 10 in the rigid fastening reinforcing structure 9 adopts a bracket type installation structure, which comprises a pair of annular rigid brackets 11 arranged at the two end parts on the periphery of the electrolytic cell body, and the two ends of each rigid limiter 10 are connected between the pair of annular rigid brackets 11.

[0033] The bracket type installation structure is an integral independent structure arranged on the periphery of the electrolytic cell body, which does not need to be connected with the end pressure plates 8 at the two ends of the electrolytic cell, and only needs to be arranged in gaps or abut against the outer circles of the polar plates 4 through the insulating structure between the rigid limiters 10 and the outer circles of the polar plates 4, so as to allow the electrolytic cell to normally expand and contract in the longitudinal direction, and at the same time, play a role of radial limitation for the polar plates 4.

[0034] As the second preferred solution of the installation mode of the rigid fastening reinforcing structure in the embodiment, the rigid limiter 10 in the rigid fastening reinforcing structure 9 adopts an end pressure plate installation structure, which connects the two ends of each rigid limiter 10 with the end pressure plates 8 at the two ends of the electrolytic cell through fastening connectors 12.

[0035] Preferably, the rigid limiting member 10 and the fastening connecting member 12 in the rigid fastening reinforcing structure 9 are designed in a slidable or rolling structure.

[0036] Preferably, when the length of the electrolytic cell is longer, the rigid fastening reinforcing structure 9 further comprises one or more reinforcing hoops (not shown in the figure) arranged at the middle part of the periphery of the electrolytic cell body, and each rigid limiting member 10 is fixedly connected with the reinforcing hoops.

[0037] Preferably, the number of the rigid limiting members 10 is four, each rigid limiting member 10 is arranged along the longitudinal direction of the electrolytic cell body, and the four rigid limiting members 10 are arranged uniformly in the circumferential direction.

[0038] The above description is only the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A peripheral fastened alkaline water electrolyzer characterized by, The alkaline water hydrogen production electrolytic tank comprises a plurality of components combined by a polar plate, an intermediate polar plate, an end polar plate, an end pressing plate, a gasket, a tension bolt, a disc spring and a fastening nut, characterized in that a rigid fastening reinforcing structure is arranged on the periphery of the body of the alkaline water hydrogen production electrolytic tank to limit the bending or distortion of the electrolytic tank body and maintain the flatness of the electrolytic tank body.

2. A peripherally secured alkaline water electrolyzer according to claim 1, characterized in that, The rigid fastening reinforcing structure comprises a plurality of rigid limiters arranged on the periphery of the electrolytic tank body, which are arranged dispersedly on the periphery of the electrolytic tank body and arranged in the gaps or in contact with the outer circles of the polar plates on the electrolytic tank body, thereby forming radial limitation for the polar plates in the electrolytic tank body.

3. A peripherally secured alkaline water electrolyser according to claim 2, characterised in that, The rigid limiters adopt rigid profiles, which are selected from H-shaped steel, I-shaped steel, round steel, steel pipe or other rigid profiles.

4. A peripherally secured alkaline water electrolyzer according to claim 1, wherein, The tension bolt is wrapped with an insulating material, and the insulating material is selected from glass fiber reinforced plastic, polypropylene, polytetrafluoroethylene or other insulating materials.

5. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 4, wherein, An insulating structure is arranged between the rigid fastening reinforcing structure and the electrolytic tank body, which is made of insulating material and can ensure that the electrolytic tank body and the rigid fastening reinforcing structure are not conductive, and the rigid fastening reinforcing structure and the tension bolt are arranged in a spaced or close manner.

6. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 5, wherein, The insulating structure between the rigid fastening reinforcing structure and the electrolytic tank body is designed with a slidable structure or a slidable material.

7. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 1, wherein, The rigid fastening reinforcing structure is provided with an insulating material coating on the outer surface, so that the surface of the rigid fastening reinforcing structure has good insulation.

8. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 2, wherein, The rigid limiters in the rigid fastening reinforcing structure adopt a bracket type mounting structure, which comprises a pair of annular rigid brackets arranged at the two end positions on the periphery of the electrolytic tank body, and the two ends of each rigid limiter are connected between the pair of annular rigid brackets.

9. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 2, wherein, The rigid limiters in the rigid fastening reinforcing structure adopt an end pressing plate mounting structure, which connects the two ends of each rigid limiter with the end pressing plates at the two ends of the electrolytic tank through fastening connectors.

10. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 9, wherein, The rigid limiters in the rigid fastening reinforcing structure and the fastening connectors adopt a slidable or rolling structure design.

11. A peripherally secured alkaline water electrolyzer for hydrogen production according to claim 8 or 9, characterized in that, The rigid fastening reinforcing structure further comprises one or more reinforcing hoops arranged at the intermediate position on the periphery of the electrolytic tank body, and each rigid limiter is fixedly connected with the reinforcing hoops.

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