Pressure electrolytic cell cell sealing structure and hydrogen production equipment

Abstract

The application discloses a pressure electrolytic cell chamber sealing structure and a hydrogen production equipment, and belongs to the technical field of hydrogen production by water electrolysis. The pressure electrolytic cell chamber sealing structure comprises a plurality of polar plates, a sealing gasket and a limiting structure, wherein the plurality of polar plates are attached to each other; the sealing gasket is arranged between the two adjacent polar plates which are attached to each other; and the limiting structure is arranged on the polar plate and the sealing gasket, and the limiting structure limits the sealing gasket between the two adjacent polar plates. The utility model can solve the problem that the sealing device of the large electrolytic cell is prone to sealing failure.

Description

Technical Field

[0001] This application relates to the field of water electrolysis hydrogen production technology, and in particular to a pressure-type electrolyzer chamber sealing structure and hydrogen production equipment. Background Technology

[0002] In recent years, with the implementation of the dual-carbon strategy, the water electrolysis hydrogen production industry has developed rapidly. Compared with traditional water electrolysis hydrogen production processes, the rise of green hydrogen and large-scale production applications in energy and chemical industries have placed higher demands on the scale and number of individual electrolyzers, leading to increasingly larger electrolyzers. Large electrolyzers have achieved significant breakthroughs in diameter and length compared to equipment in traditional applications, and the number of electrolysis chambers and the amount of sealing gaskets used have reached new heights. During the water electrolysis hydrogen production process, the sealing devices are subjected to unprecedented high temperatures and pressures, making it easy for ordinary sealing devices to fail. Utility Model Content

[0003] The main objective of this application is to provide a pressure-type electrolyzer chamber sealing structure and hydrogen production equipment, aiming to solve the problem of easy sealing failure of the sealing device in large electrolyzers.

[0004] To achieve the above objectives, this application provides a pressure-type electrolytic cell chamber sealing structure, comprising: multiple electrode plates, a sealing gasket, and a limiting structure, wherein the multiple electrode plates are bonded together; the sealing gasket is disposed between two adjacent electrode plates bonded together; the limiting structure is disposed on the electrode plates and the sealing gasket, and the limiting structure limits the sealing gasket to be located between two adjacent electrode plates.

[0005] Optionally, the limiting structure includes a slot and a protrusion, wherein the slot is formed on both sides of the two electrode plates facing the sealing gasket; the protrusion is disposed on both sides of the sealing gasket facing the electrode plates, and the protrusion is adapted to the slot.

[0006] Optionally, a sealing water line is provided on the bottom surface of the card slot.

[0007] Optionally, a sealing water line is provided at the position on the electrode plate where the slot is not provided.

[0008] Optionally, the width of the sealing gasket at one end facing the electrolytic cell chamber is smaller than the width of the sealing gasket at other locations, and a sealing water line is provided on the side of the electrode plate away from the electrolytic cell chamber and facing the sealing gasket.

[0009] Optionally, the ratio of the width of the protrusion to the width of the sealing gasket is 0.2 to 0.5.

[0010] Optionally, the thickness of the end of the sealing gasket facing the electrolytic cell chamber is 0.2 to 0.6 compared to the thickness of other parts of the sealing gasket.

[0011] To address the aforementioned issues, this application also provides a hydrogen production device, which includes the pressure-type electrolyzer chamber sealing structure described in any of the preceding embodiments.

[0012] This application proposes a pressure-type electrolytic cell chamber sealing structure, with the synergistic effect of multiple electrode plates, sealing gaskets, and limiting structures as the core of the device. The efficient, stable, and long-term sealing of the internal reaction chamber of the electrolytic cell is achieved through the coordinated connection of multiple electrode plates, sealing gaskets, and limiting structures. In the assembled state, two electrode plates are fitted together to form a closed reaction space. The sealing gasket, positioned between the two electrode plates, is the main sealing element. The sealing gasket needs to possess good elasticity to adapt to the assembly pressure; it also needs excellent corrosion resistance, temperature resistance, and aging resistance to ensure normal operation in high-temperature, high-pressure, and highly corrosive environments for extended periods; furthermore, it needs to have high gas tightness and liquid tightness to prevent hydrogen and oxygen gas leakage or liquid seepage. The limiting structure is used to limit and fix the sealing gasket between the two electrode plates. The limiting structure can take various forms, such as protruding structures or embedded limiting structures. Protruding structures achieve a tight seal through pressure; embedded limiting structures use grooves, retaining rings, etc., on the electrode plates to assist in positioning the sealing gasket. The above sealing methods effectively ensure that the gaskets in large electrolytic cells will not slip off, thus preventing sealing failure. Attached Figure Description

[0013] Figure 1 An exploded view of the structure of a pressure-type electrolytic cell chamber sealing structure provided in this application embodiment;

[0014] Figure 2 for Figure 1 A schematic diagram showing the working relationship between the various components.

[0015] Figure 3 An exploded view of a pressure-type electrolytic cell chamber sealing structure provided in another embodiment of this application;

[0016] Figure 4 for Figure 3 A schematic diagram showing the working relationship between the various components.

[0017] Figure 5 An exploded view of a pressure-type electrolytic cell chamber sealing structure provided in another embodiment of this application;

[0018] Figure 6 for Figure 5 A schematic diagram showing the working relationship between the various components.

[0019] In the diagram, 1 is the electrode plate; 101 is the slot; 102 is the sealing water line; 2 is the sealing gasket; 201 is the protrusion; and 3 is the electrolytic cell chamber.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Please see Figures 1 to 6This application provides a pressure-type electrolytic cell chamber sealing structure. The sealing device may include: multiple electrode plates 1, sealing gaskets 2, and limiting structures. The multiple electrode plates 1 are attached to each other. The sealing gaskets 2 are disposed between two adjacent electrode plates 1 that are attached to each other. The limiting structures are disposed on the electrode plates 1 and the sealing gaskets 2, and the limiting structures limit the sealing gaskets 2 to be located between two adjacent electrode plates 1.

[0026] In this embodiment, the synergistic effect of multiple electrode plates 1, sealing gaskets 2, and limiting structures is the core of this device. The efficient, stable, and long-term sealing of the reaction chamber inside the electrolytic cell is achieved through the coordinated connection of multiple electrode plates 1, sealing gaskets 2, and limiting structures. In the assembled state, two electrode plates 1 are fitted together to form a closed reaction space. The sealing gasket 2, positioned between the two electrode plates 1, is the main sealing element. The sealing gasket 2 needs to have good elasticity to adapt to assembly pressure; it also needs to have excellent corrosion resistance, temperature resistance, and aging resistance to enable long-term normal use in high-temperature, high-pressure, and highly corrosive environments; and it also needs to have high airtightness and liquid tightness to prevent hydrogen and oxygen gas leakage or liquid seepage. The limiting structure is used to limit and fix the sealing gasket 2 between the two electrode plates 1. The limiting structure can take various forms, such as protruding structures or embedded limiting structures. Protruding structures achieve sealing through pressure; embedded limiting structures use grooves, retaining rings, etc., on the electrode plates 1 to assist in positioning the sealing gasket 2. The above sealing method effectively ensures that the sealing gasket 2 in the large electrolytic cell will not slip off and will not cause sealing failure.

[0027] It should be noted that the two electrode plates 1 can be made of corrosion-resistant metals, such as nickel-plated carbon steel; the sealing gasket 2 is mainly made of insulating material, such as modified fluoroplastics.

[0028] Please see Figures 1 to 4 In one possible implementation, the limiting structure may include a slot 101 and a protrusion 201, wherein the slot 101 is formed on both sides of the two electrode plates 1 facing the sealing gasket 2; the protrusion 201 is disposed on both sides of the sealing gasket 2 facing the electrode plates 1, and the protrusion 201 fits perfectly into the slot 101.

[0029] The slot 101 can be rectangular, and the corresponding protrusion 201 can be rectangular. Of course, in some embodiments, the slot 101 can be arc-shaped, and the corresponding protrusion 201 can be arc-shaped, etc. The shape of the slot 101 and the protrusion 201 can be changed according to the specific situation to ensure that the sealing gasket 2 will not slip off between the two electrode plates 1.

[0030] Specifically, the groove 101, in conjunction with the protrusion 201, can limit the sealing gasket 2 between the two electrode plates 1, effectively preventing the sealing gasket 2 from shifting or slipping during assembly or operation. The protrusion 201 is embedded in the groove 101 on the electrode plate 1, forming a mechanical limit, which improves the tight fit between the sealing gasket 2 and the electrode plate 1, and enhances the sealing effect.

[0031] Please see Figure 1 , Figure 2 In one possible implementation, a sealing water line 102 may be provided on the bottom surface of the card slot 101.

[0032] In this embodiment, the sealing water line 102 further enhances the sealing effect. When pressure is generated inside the electrolytic cell, the sealing water line 102, together with the sealing gasket 2, forms an additional seal, effectively preventing gas or liquid leakage. The design of the sealing water line 102 ensures that the sealing device maintains excellent sealing performance under long-term high temperature and high pressure environments, thereby improving the safety and stability of the entire electrolytic cell.

[0033] In addition, the sealing water line 102 can also serve as an additional safety barrier. Even if the sealing gasket 2 experiences minor wear due to long-term use or environmental factors, the sealing water line 102 can compensate for this defect to a certain extent and extend the service life of the sealing device.

[0034] Please see Figure 3 , Figure 4 In one possible implementation, a sealing water line 102 may be provided at the position on the electrode plate 1 where the slot 101 is not provided.

[0035] In this embodiment, the engagement of the protrusion 201 with the slot 101 and the sealing water line 102 together constitute a multi-layer sealing mechanism. The protrusion 201, embedded in the slot 101, provides mechanical restraint, ensuring the stable position of the sealing gasket 2 between the electrode plates 1 and preventing seal failure due to vibration or pressure changes. The sealing water line 102 provides an additional sealing barrier, effectively preventing gas or electrolyte leakage even under high-pressure environments. This design not only improves the reliability of the seal but also enhances the overall safety and stability of the electrolytic cell.

[0036] Please see Figure 5 , Figure 6 In one possible implementation, the width of the end of the sealing gasket 2 facing the electrolytic cell chamber 3 is smaller than the width of the sealing gasket 2 at other locations, and a sealing water line 102 can be provided on the side of the electrode plate 1 away from the electrolytic cell chamber 3 and facing the sealing gasket 2.

[0037] Specifically, the design of the sealing gasket 2 has been carefully considered to optimize the sealing effect. The width of the end of the sealing gasket 2 facing the electrolytic cell chamber is designed to be smaller than the width at other locations. This design facilitates easier positioning of the sealing gasket 2 during installation. Simultaneously, the internal pressure force F acting on the sealing gasket is equal to the electrolytic cell working pressure P multiplied by the contact area S of the sealing gasket's internal pressure cross-section, i.e., F = P * S. It is evident that reducing the internal pressure cross-section directly reduces the internal pressure force. For example, if the conventional electrolytic cell sealing gasket 2 is approximately 3mm thick, this technology sets the inner edge thickness of the sealing gasket 2 to 1mm, thus reducing the radial extrusion force of the working internal pressure of the electrolytic cell on the sealing gasket 2. This achieves zero displacement of the sealing gasket 2, ensuring the long-term sealing capability of the electrolytic cell sealing system. Furthermore, a sealing water line 102 is provided at the end of the electrode plate 1 furthest from the electrolytic cell chamber. This design further enhances the reliability of the seal and prevents leakage that may occur from the edge of the electrode plate.

[0038] Furthermore, in one possible implementation, the ratio of the width of the protrusion 201 to the width of the sealing gasket 2 can be 0.2 to 0.5.

[0039] Specifically, the ratio of the width of the protrusion 201 to the width of the sealing gasket 2 can be 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc.

[0040] It is worth noting that the ratio of the width of the protrusion 201 to the width of the sealing gasket 2 is controlled within the range of 0.2 to 0.5. This ratio is chosen based on a comprehensive consideration of sealing performance and ease of assembly. An excessively wide protrusion 201 may increase assembly difficulty, while an excessively narrow protrusion 201 may affect the sealing effect. Through extensive experiments and simulation analyses, this optimal ratio was finally determined to ensure the best performance of the sealing device.

[0041] Furthermore, in one possible implementation, the thickness of the end of the sealing gasket 2 facing the electrolytic cell chamber 3 is 0.2 to 0.6 compared to the thickness of the sealing gasket 2 at other locations.

[0042] In this embodiment, the ratio of the thickness of the end of the sealing gasket 2 facing the electrolytic cell chamber 3 to the thickness of other parts of the sealing gasket 2 can be 0.2, 0.3, 0.4, 0.5, 0.6, etc.

[0043] The ratio of the thickness of the end of the sealing gasket 2 facing the electrolytic cell chamber 3 to the thickness of other parts of the sealing gasket 2 is controlled within the range of 0.2 to 0.6. This design aims to balance sealing performance and assembly pressure. The smaller thickness helps reduce the radial extrusion force on the sealing gasket 2 during installation, thereby reducing the risk of deformation of the sealing gasket 2 due to long-term pressure. At the same time, this design also ensures that the sealing gasket 2 has sufficient elasticity at the inner end of the electrolytic cell chamber 3 to accommodate minor deformations caused by temperature changes or pressure fluctuations, thus maintaining a long-term sealing effect. Experimental verification has shown that the sealing gasket 2 within this ratio range exhibits excellent sealing performance and a long service life.

[0044] In summary, the pressure-type electrolyzer chamber sealing structure provided in this application embodiment achieves a highly efficient, stable, and long-term sealing effect through the ingenious design of the electrode plates, sealing gaskets, and limiting structures. This design not only solves the problem of easy sealing failure in large electrolyzer sealing devices but also provides strong technical support for the further development of the water electrolysis hydrogen production industry.

[0045] To achieve the above objectives, this application also provides a hydrogen production device, which includes the pressure-type electrolyzer chamber sealing structure mentioned in any of the above claims.

[0046] Specifically, this hydrogen production equipment significantly improves the sealing performance and stability of the electrolyzer by applying the aforementioned sealing device to the electrolyzer. During actual operation, the reaction chamber inside the electrolyzer is efficiently and stably sealed, effectively preventing hydrogen and oxygen gas leakage or liquid seepage, thereby ensuring the safety and efficiency of the water electrolysis hydrogen production process.

[0047] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A pressure electrolyser cell seal structure characterised in that, include: Multiple electrode plates (1) are bonded together; A sealing gasket (2) is placed between two adjacent electrode plates (1) that are in contact with each other; A limiting structure is provided on the electrode plate (1) and the sealing gasket (2), and the limiting structure limits the sealing gasket (2) between two adjacent electrode plates (1).

2. The pressure electrolyser cell seal structure of claim 1, wherein, The limiting structure includes: The slots (101) are provided on both sides of the two electrode plates (1) facing the sealing gasket (2); A protrusion (201) is provided on both sides of the sealing gasket (2) facing the electrode plate (1), and the protrusion (201) is adapted to the slot (101).

3. The pressure electrolyser cell seal structure of claim 2, wherein, A sealing water line (102) is provided on the bottom surface of the card slot (101).

4. The pressure electrolyser cell seal structure of claim 2, wherein, A sealing water line (102) is provided at the position on the electrode plate (1) where the slot (101) is not provided.

5. The pressure-type electrolytic cell chamber sealing structure according to claim 1, characterized in that, The width of the sealing gasket (2) facing the electrolytic cell chamber (3) is smaller than the width of the sealing gasket (2) at other locations. The electrode plate (1) is provided with a sealing water line (102) on the side away from the electrolytic cell chamber (3) and facing the sealing gasket (2).

6. The pressure-type electrolytic cell chamber sealing structure according to claim 4, characterized in that, The ratio of the width of the protrusion (201) to the width of the sealing gasket (2) is 0.2 to 0.

5.

7. The pressure electrolyser cell seal structure of claim 5, wherein, The thickness of the sealing gasket (2) at one end facing the electrolytic cell chamber (3) is 0.2 to 0.6 compared to the thickness at other locations of the sealing gasket (2).

8. A hydrogen production apparatus, characterized by comprising: Includes the pressure-type electrolytic cell chamber sealing structure as described in any one of claims 1 to 7.

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