Electrolytic bath and hydrogen production equipment

Abstract

The utility model provides an electrolytic bath and hydrogen production equipment, and relates to the technical field of electrolytic bath hydrogen production, the electrolytic bath comprises a first end plate, a reactor core, a second end plate, a first bolt fastener and a second bolt fastener, the first end plate, the reactor core and the second end plate are sequentially stacked, the thread directions of the first bolt fastener and the second bolt fastener are opposite, and the first bolt fastener and the second bolt fastener are arranged at an interval and respectively penetrate through the first end plate, the reactor core and the second end plate. According to the utility model, the electrolytic bath can be uniformly stressed in the assembly process, and the safe operation of the electrolytic bath is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen production by electrolysis, and more specifically, to an electrolysis cell and hydrogen production equipment. Background Technology

[0002] In an electrolytic cell, the anode chamber and cathode chamber are typically separated by a diaphragm. When direct current passes through the electrolytic cell, an oxidation reaction occurs at the anode-solution interface, and a reduction reaction occurs at the cathode-solution interface, to produce desired products such as oxygen and hydrogen. In related technologies, the electrolytic cell mainly comprises end plates, a core, and multiple bolts. End plates are respectively installed on opposite sides of the core, and the two end plates and the core are fixed by multiple bolts arranged in a ring at intervals.

[0003] Electrolytic cells used for export require high tightening force for bolts and fasteners during assembly. For example, during the stacking of the two end plates and the core, a press is usually used for pressure assembly, with the force acting on the electrolytic cell ranging from tens to hundreds of tons, and ensuring that the flatness of the assembly can reach ±0.5mm.

[0004] However, the bolt structure of the bolt fasteners usually adopts right-hand thread (e.g., clockwise thread). The bolts are evenly distributed around the axis of the end plate. After the nut structure of the bolt fastener is tightened, the nut structure, the bolt structure and the end plate will generate counterclockwise friction force for pre-tightening. The superposition of the pre-tightening forces generated by all the nut structures in the same direction will cause the electrolytic cell to generate a lateral force of about 10% of the assembly force. This lateral force may cause the core to bulge outward, twist and deform, etc., so that the core material will be deformed, displaced, bulged outward, twisted and deformed due to temperature alternation, pressure alternation, vibration and other factors during the use of the electrolytic cell, which will affect the safe operation of the electrolytic cell. Utility Model Content

[0005] The problem this invention addresses is how to ensure the safe operation of an electrolytic cell.

[0006] To address the aforementioned problems, this utility model provides an electrolyzer and hydrogen production equipment.

[0007] In a first aspect, the present invention provides an electrolytic cell, including a first end plate, a core, a second end plate, a first bolt fastener, and a second bolt fastener. The first end plate, the core, and the second end plate are stacked sequentially. The threads of the first bolt fastener and the second bolt fastener are opposite. The first bolt fastener and the second bolt fastener are spaced apart and respectively pass through the first end plate, the core, and the second end plate.

[0008] Optionally, the electrolytic cell includes a plurality of first bolt fasteners and a plurality of second bolt fasteners, with at least one first bolt fastener and at least one second bolt fastener distributed alternately.

[0009] Optionally, the electrolytic cell includes a plurality of first bolt fasteners and a plurality of second bolt fasteners, with at least a portion of the first bolt fasteners and at least a portion of the second bolt fasteners symmetrically distributed.

[0010] Optionally, the electrolytic cell includes a plurality of first bolt fasteners and a plurality of second bolt fasteners, the first bolt fasteners and the second bolt fasteners being diagonally distributed along the axis of the core.

[0011] Optionally, the core includes a first current collector, a plurality of electrode structures, and a second current collector stacked sequentially. The first current collector is attached to the first end plate, and the second current collector is attached to the second end plate. The plurality of electrode structures are stacked. The first current collector and the second current collector are used to be electrically connected to the positive and negative terminals of the DC power supply, respectively.

[0012] Optionally, the electrode structure includes a first sealing gasket, a bipolar plate, and a second sealing gasket stacked sequentially.

[0013] Optionally, both the first bolt fastener and the second bolt fastener include a bolt structure and a nut structure, the bolt structure passing through the first end plate and the second end plate, and at least two nut structures connected to the end of the bolt structure.

[0014] Optionally, both the first bolt fastener and the second bolt fastener further include a disc spring, which is sleeved on the bolt structure, and the disc spring is disposed between the first end plate and / or the second end plate and the nut structure.

[0015] Optionally, both the first bolt fastener and the second bolt fastener further include an insulating sleeve portion, which is sleeved outside the bolt structure.

[0016] Secondly, this utility model provides a hydrogen production device, including the electrolyzer described above.

[0017] The beneficial effects of the electrolyzer and hydrogen production equipment of this utility model are:

[0018] The components of the electrolytic cell can be assembled in the following manner: for example, the first end plate, the core, and the second end plate are stacked sequentially, and then the first and second bolts, which are spaced apart, are respectively inserted into the first end plate, the core, and the second end plate, and tightened. Since the threads of the first and second bolts are opposite, the torques generated by the first and second bolts during tightening are opposite, which causes the lateral forces generated by the spaced-apart first and second bolts to cancel each other out, thereby ensuring that the electrolytic cell is subjected to balanced forces during assembly. This reduces the magnitude of the lateral forces generated by the electrolytic cell during assembly in related technologies, and correspondingly reduces problems such as outward bulging and twisting of the core caused by factors such as temperature, pressure, and vibration during operation, thus ensuring the safe operation of the electrolytic cell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the distribution effect of unidirectional bolt fasteners in an electrolytic cell in related technologies.

[0020] Figure 2 This is a schematic diagram illustrating the effects of core deformation and displacement in an electrolytic cell in related technologies.

[0021] Figure 3 This is a schematic diagram of the electrolytic cell in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the alternating distribution of the first and second bolt fasteners in the electrolytic cell according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the symmetrically distributed first and second bolt fasteners of the electrolytic cell in an embodiment of this utility model.

[0024] Figure 6 This is an exploded structural diagram of the electrolytic cell in an embodiment of this utility model;

[0025] Figure 7 This is a cross-sectional structural diagram of the electrolytic cell in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1'-Electrolytic cell end plate; 2'-Bolt fasteners; 3'-Core;

[0028] 1-First end plate; 11-Electrolyte inlet; 12-Electrolyte outlet; 13-Hydrogen outlet; 2-Second end plate; 3-Core; 31-First collector plate; 32-Electrode plate structure; 321-First sealing gasket; 322-Bipolar plate; 323-Second sealing gasket; 324-Diaphragm; 33-Second collector plate; 4-First bolt fastener; 5-Second bolt fastener; 41-Bolt structure; 42-Nut structure; 43-Disc spring. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0030] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down position, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as front and back position, with the positive direction of the X-axis representing the right and the negative direction representing the left. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for ease of description and simplification of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0031] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0032] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0033] In related technologies, electrolytic cells typically use diaphragms to separate the anode and cathode chambers. When direct current passes through the electrolytic cell, an oxidation reaction occurs at the anode-solution interface, and a reduction reaction occurs at the cathode-solution interface, to produce desired products such as oxygen and hydrogen. In related technologies, combined with... Figure 1 As shown, the electrolytic cell mainly includes end plates, a core 3', and multiple bolt fasteners 2', wherein the core 3' ( Figure 1 End plates are respectively provided on the opposite sides of the core 3' (not shown in the figure), and the two end plates and the core 3' are fixed by a plurality of bolts 2' arranged in a ring at intervals.

[0034] For electrolytic cells used in exports, the bolt fasteners 2' require a high degree of tightening force during assembly. For example, during the stacking process of the two end plates and the core 3', a press is usually used for pressure assembly. The force acting on the electrolytic cell ranges from tens to hundreds of tons, and the flatness of the assembly must be ±0.5mm.

[0035] However, the bolt structure of bolt fastener 2' typically uses right-hand threads (e.g., clockwise threads). Bolts are evenly distributed around the axis of the end plate. After the nut structure of bolt fastener 2' is tightened, the nut structure, bolt structure, and end plate generate a counter-clockwise frictional force for pre-tightening. The superposition of the pre-tightening forces generated by all nut structures in the same direction causes a lateral force of approximately 10% of the assembly force in the electrolytic cell (this lateral force... Figure 1 (This can be represented by F'), and this lateral force may cause the core 3' to bulge outward, twist, or deform. This can lead to problems such as material deformation, displacement, bulging, twisting, or even the core 3''s sealing gasket popping out during the use of the electrolytic cell due to factors such as temperature alternation, pressure alternation, and vibration, thus affecting the safe operation of the electrolytic cell.

[0036] in, Figure 2 In the diagram, the core before the bolts are tightened can be represented by a cross-sectional line, while the core that bulges outward (or twists) after the bolts are tightened can be represented by two arc lines.

[0037] To address the problems existing in the aforementioned related technologies, this embodiment provides an electrolyzer and hydrogen production equipment.

[0038] like Figure 3 As shown in the figure, an electrolytic cell provided by this utility model includes a first end plate 1, a core 3, a second end plate 2, a first bolt fastener 4, and a second bolt fastener 5. The first end plate 1, the core 3, and the second end plate 2 are stacked sequentially. The threads of the first bolt fastener 4 and the second bolt fastener 5 are opposite. The first bolt fastener 4 and the second bolt fastener 5 are spaced apart and respectively pass through the first end plate 1, the core 3, and the second end plate 2.

[0039] Specifically, the opposite thread directions of the first bolt fastener 4 and the second bolt fastener 5 can be understood as follows: if the bolt structure 41 of the first bolt fastener 4 has a clockwise thread, then the second bolt fastener 5 has a counterclockwise thread; or, if the bolt structure 41 of the first bolt fastener 4 has a counterclockwise thread, then the second bolt fastener 5 has a clockwise thread.

[0040] In this embodiment, the components of the electrolytic cell can be assembled in the following manner: for example, the first end plate 1, the core 3, and the second end plate 2 are stacked sequentially, and then the first bolt fastener 4 and the second bolt fastener 5, which are spaced apart, are respectively inserted into the first end plate 1, the core 3, and the second end plate 2, and tightened. Since the thread directions of the first bolt fastener 4 and the second bolt fastener 5 are opposite, the torques generated by the first bolt fastener 4 and the second bolt fastener 5 during tightening are opposite, which makes the lateral forces generated by the spaced first bolt fastener 4 and the second bolt fastener 5 cancel each other out, so as to ensure that the electrolytic cell is subjected to balanced forces during assembly, reduce the magnitude of the lateral forces generated by the electrolytic cell during assembly in related technologies, and correspondingly reduce the problems of outward bulging and twisting of the core 3 caused by factors such as temperature, pressure, and vibration during the operation of the electrolytic cell, thereby ensuring the safe operation of the electrolytic cell.

[0041] In addition, an electrolyte inlet 11, an electrolyte outlet 12 and a hydrogen outlet 13 are provided on the first end plate 1; or, the electrolyte inlet 11 and the electrolyte outlet 12 may be respectively provided on the first end plate 1 and the second end plate 2.

[0042] Optionally, combined Figure 4 As shown, the electrolytic cell includes a plurality of first bolt fasteners 4 and a plurality of second bolt fasteners 5, with at least one first bolt fastener 4 and at least one second bolt fastener 5 alternately distributed.

[0043] Specifically, taking the connection of the first bolt fastener 4 and the second bolt fastener 5 to the first end plate 1 as an example, the first end plate 1 and the second end plate 2 of the electrolytic cell can be rectangular plates, circular plates, or polygonal plates. Figure 4 and Figure 5 The first end plate 1 and the second end plate 2 are rectangular plates. The number of the first bolt fastener 4 and the second bolt fastener 5 can be the same or different.

[0044] The alternating distribution of at least one first bolt fastener 4 and at least one second bolt fastener 5 can be understood as the alternating distribution of two adjacent first bolt fasteners 4 and second bolt fasteners 5, or the alternating distribution of one first bolt fastener 4 and multiple second bolt fasteners 5, or the alternating distribution of multiple first bolt fasteners 4 and one second bolt fastener 5, or the alternating distribution of at least two first bolt fasteners 4 and at least two second bolt fasteners 5.

[0045] Figure 4 In the diagram, the lateral force generated by the first bolt fastener 4 during the tightening process can be represented by F1, and the lateral force generated by the second bolt fastener 5 during the tightening process can be represented by F2.

[0046] In this optional embodiment, the arrangement of the first bolt fastener 4 and the second bolt fastener 5 follows the principle of alternating arrangement, which not only achieves the offset or counterbalance of lateral forces (torque), but also reduces the difficulty of assembling the electrolytic cell, reduces the tendency of the membrane electrode, electrode plate and diffusion layer of the core 3 to shift, deform, become uneven or twisted, and improves the stability of the electrolytic cell in long-term operation and its ability to operate under high pressure differential.

[0047] Optionally, combined Figure 5 As shown, the electrolytic cell includes a plurality of first bolt fasteners 4 and a plurality of second bolt fasteners 5, with at least a portion of the first bolt fasteners 4 and at least a portion of the second bolt fasteners 5 symmetrically distributed.

[0048] Specifically, the symmetrical distribution of at least a portion of the first bolt fasteners 4 and at least a portion of the second bolt fasteners 5 can be understood as a symmetrical distribution of a portion of the first bolt fasteners 4 and a portion of the second bolt fasteners 5, or a symmetrical distribution of all the first bolt fasteners 4 and all the second bolt fasteners 5.

[0049] For example, if the first end plate 1 and the second end plate 2 are rectangular plates, then a row of multiple first bolt fasteners 4 arranged longitudinally and a row of multiple second bolt fasteners 5 are symmetrically distributed, and a column of multiple first bolt fasteners 4 arranged transversely and a column of multiple second bolt fasteners 5 are symmetrically distributed.

[0050] Figure 5 In the diagram, the lateral force generated by the first bolt fastener 4 during the tightening process can be represented by F1, and the lateral force generated by the second bolt fastener 5 during the tightening process can be represented by F2.

[0051] In this optional embodiment, the first bolt fastener 4 and the second bolt fastener 5 are arranged symmetrically, which not only achieves the cancellation or offset of lateral forces (torque), but also reduces the difficulty of assembling the electrolytic cell, reduces the tendency of the membrane electrode, electrode plate and diffusion layer of the core 3 to shift, deform, become uneven or twisted, and improves the long-term stability of the electrolytic cell and its ability to operate under high pressure differential.

[0052] Optionally, the electrolytic cell includes a plurality of first bolt fasteners 4 and a plurality of second bolt fasteners 5, wherein the first bolt fasteners 4 and the second bolt fasteners 5 are diagonally distributed.

[0053] Specifically, the first bolt fastener 4 and the second bolt fastener 5 being diagonally distributed can be understood as follows: if the first end plate 1 and the second end plate 2 are rectangular plates or regular polygonal plates, taking the first end plate 1 as an example, the first bolt fastener 4 and the second bolt fastener 5 are respectively provided at the two opposite corners of the first end plate 1.

[0054] In this optional embodiment, the first bolt fastener 4 and the second bolt fastener 5 are arranged diagonally, which not only achieves the cancellation or counteraction of lateral forces (torque), but also reduces the difficulty of assembling the electrolytic cell, reduces the tendency of the membrane electrode, electrode plate and diffusion layer of the core 3 to shift, deform, become uneven or twisted, and improves the stability of the electrolytic cell in long-term operation and its ability to operate under high pressure differential.

[0055] Optionally, combined Figure 6 As shown, the core 3 includes a first current collector 31, a plurality of electrode structures 32 and a second current collector 33 stacked in sequence. The first current collector 31 is attached to the first end plate 1, and the second current collector 33 is attached to the second end plate 2. The plurality of electrode structures 32 are stacked in sequence. The first current collector 31 and the second current collector 33 are used to be electrically connected to the positive and negative terminals of the DC power supply, respectively.

[0056] Specifically, the first collector plate 31 can be fitted to the side wall of the first end plate 1 facing the second end plate 2, and the second collector plate 33 can be fitted to the side wall of the second end plate 2 facing the first end plate 1.

[0057] The first current collector 31 can be used as the anode plate of the electrolytic cell, and has a positive electrode terminal that can be electrically connected to the positive terminal of the DC power supply; the second current collector 33 can be used as the cathode plate of the electrolytic cell, and has a negative electrode terminal that can be electrically connected to the negative terminal of the DC power supply.

[0058] Optionally, combined Figure 6 As shown, the electrode structure 32 includes a first sealing gasket 321, a bipolar plate 322, and a second sealing gasket 323 stacked in sequence.

[0059] Specifically, one side of the bipolar plate 322 is the anode side, and the opposite side can be the cathode side. The two sides of the bipolar plate 322 can have the same structure, so there is no need to distinguish between the front and back sides during installation.

[0060] The first sealing gasket 321 and the second sealing gasket 323 can be made of corrosion-resistant, insulating, and stable rubber products (such as EPDM rubber), which can be sealed to the outer edge of the bipolar plate 322 to ensure the sealing performance of the electrolytic cell and prevent electrolyte leakage in the electrolytic cell.

[0061] Furthermore, the electrolytic cell may include multiple electrolytic chambers, with one electrolytic chamber located between two adjacent bipolar plates 322. (Combined) Figure 7 As shown, the electrode structure 32 may further include a diaphragm 324, which may be disposed between the two bipolar plates 322 to prevent the mixing of hydrogen and oxygen generated in the electrolysis chamber; the diaphragm 324 may be made of asbestos. To further improve the sealing performance of the electrolytic cell, sealing gaskets may be provided on both sides of the diaphragm 324, and similarly, sealing gaskets may be provided on both sides of the bipolar plates 322.

[0062] The electrolytic cell is filled with electrolyte, which can be an aqueous solution of sodium hydroxide or potassium hydroxide. When the first current collector 31 and the second current collector 33 are connected to a DC power supply, hydrogen and oxygen can be generated in the electrolytic cell.

[0063] Figure 7 The vertical arrow inside the electrolyzer indicates the direction in which hydrogen gas flows upward into the hydrogen gas channel within the electrolysis chamber.

[0064] Figure 7 In the process, the stacking direction of the first end plate 1, the core 3, and the second end plate 2 can be the same as that of the other end plate 2. Figure 7 The Z-axis of the coordinate system is parallel to the direction of the flow of hydrogen gas. The direction of the arrow inside the electrolyzer indicates the flow direction of hydrogen gas. Figure 7 The X-axis is parallel in the coordinate system.

[0065] The electrolyzer may also include a membrane electrode, which is alternately stacked with bipolar plates. The membrane electrode may be composed of one or more layers of ion exchange membrane and electrode material. This ion exchange membrane has selective permeability, which allows specific types of ions to pass through while preventing the diffusion of other ions or molecules. During the electrolysis process, the membrane electrode plays a key role in separating the electrolyte solution, preventing the mixing of different electrolytes, and promoting ion exchange.

[0066] Optionally, combined Figure 6 As shown, both the first bolt fastener 4 and the second bolt fastener 5 include a bolt structure 41 and a nut structure 42. The bolt structure 41 passes through the first end plate 1 and the second end plate 2, and at least two of the nut structures 42 are connected to the end of the bolt structure 41.

[0067] Specifically, the first bolt fastener 4 and the second bolt fastener 5 have the same component composition, but the thread direction of the bolt structure 41 of the first bolt fastener 4 and the second bolt fastener 5 is opposite.

[0068] Taking the first bolt fastener 4 as an example, the bolt structure 41 of the first bolt fastener 4 may have a regular polygonal head, and at least two nut structures 42 may be provided at the other end of the bolt structure 41; or, the bolt structure 41 of the first bolt fastener 4 may not have a regular polygonal head, and at least two nut structures 42 may be provided at each end of the bolt structure 41.

[0069] In this optional embodiment, after the first end plate 1, the core 3, and the second end plate 2 are stacked, the bolt structure 41 of the first bolt fastener 4 and the second bolt fastener 5 can be inserted into the first end plate 1, the core 3, and the second end plate 2. Subsequently, two nut structures 42 can be connected to at least one end of the bolt structure 41 to improve the assembly stability of the components in the electrolytic cell, such as the first end plate 1, the core 3, and the second end plate 2.

[0070] Optionally, combined Figure 6 As shown, both the first bolt fastener 4 and the second bolt fastener 5 further include a disc spring 43, which is sleeved on the bolt structure 41. The disc spring 43 is disposed between the first end plate 1 and / or the second end plate 2 and the nut structure 42.

[0071] Specifically, taking the first bolt fastener 4 as an example, if the bolt structure 41 of the first bolt fastener 4 has a regular polygonal head, a disc spring 43 can be sleeved on the other end of the bolt structure 41, and the disc spring 43 is located between the nut structure 42 and the first end plate 1; or, if the bolt structure 41 of the first bolt fastener 4 does not have a regular polygonal head, a disc spring 43 can be sleeved on each end of the bolt structure 41, and a disc spring 43 can be set between the first end plate 1 and the nut structure 42 at one end of the bolt structure 41, and another disc spring 43 can be set between the second end plate 2 and the nut structure 42 at the other end of the bolt structure 41.

[0072] In this optional embodiment, by providing the disc spring 43 between the first end plate 1 and / or the second end plate 2 and the nut structure 42, the disc spring 43 can help the operator to pre-tighten the nut structure 42 connected to the bolt structure 41, so that the pre-tightening force of the multiple first bolt fasteners 4 and the multiple second bolt fasteners 5 on the first end plate 1, the core 3 and the second end plate 2 is balanced, thus ensuring the assembly quality of each component of the electrolytic cell.

[0073] Optionally, both the first bolt fastener 4 and the second bolt fastener 5 further include an insulating sleeve portion, which is sleeved on the outside of the bolt structure 41.

[0074] Specifically, an insulating sleeve (not shown in the figure) can be fitted between the two ends of the bolt structure 41. The insulating sleeve can be fixed to the bolt structure 41 by means of bonding, heat fusion or other methods.

[0075] In this optional embodiment, by providing an insulating sleeve over the bolt structure 41, the insulating sleeve not only serves to insulate the bolt structure 41 of the first bolt fastener 4 and the second bolt fastener 5 from the core 3, such as the first current collector 31, the electrode structure 32, and the second current collector 33, but also prevents electric shock accidents from the outside of the electrolytic cell, such as from operators.

[0076] This utility model provides a hydrogen production device, including the electrolyzer described in the above embodiment.

[0077] The hydrogen production equipment in this embodiment also includes a circulating pump, a gas-liquid separator, an inlet pipe, and an outlet pipe. The outlet of the circulating pump is connected to the electrolyte inlet 11 of the electrolyzer through the inlet pipe, which is used to transport the electrolyte into the electrolyzer through the inlet pipe. The electrolyte outlet 12 of the electrolyzer is connected to the gas-liquid separator through the outlet pipe, so that the gas-liquid mixture output from the electrolyte inlet 11 in the electrolyzer is separated into gases by the gas-liquid separator. The gas-liquid separator is connected to the inlet of the circulating pump through a connecting pipe. The remaining electrolyte in the gas-liquid separator is cooled and then pumped into the electrolyzer through the connecting pipe by the circulating pump, so that the electrode liquid in the electrolyzer can circulate.

[0078] The hydrogen production equipment in this embodiment has the same beneficial effects as the electrolyzer described above compared to the prior art, and will not be repeated here.

[0079] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. An electrolytic cell, characterized in that, It includes a first end plate (1), a core (3), a second end plate (2), a first bolt fastener (4), and a second bolt fastener (5). The first end plate (1), the core (3), and the second end plate (2) are stacked in sequence. The first bolt fastener (4) and the second bolt fastener (5) have opposite thread directions. The first bolt fastener (4) and the second bolt fastener (5) are spaced apart and pass through the first end plate (1), the core (3), and the second end plate (2), respectively.

2. The electrolytic cell according to claim 1, characterized in that, It includes a plurality of first bolt fasteners (4) and a plurality of second bolt fasteners (5), with at least one first bolt fastener (4) and at least one second bolt fastener (5) alternately distributed.

3. The electrolytic cell according to claim 1, characterized in that, It includes a plurality of first bolt fasteners (4) and a plurality of second bolt fasteners (5), with at least a portion of the first bolt fasteners (4) and at least a portion of the second bolt fasteners (5) symmetrically distributed.

4. The electrolytic cell according to claim 1, characterized in that, It includes a plurality of first bolt fasteners (4) and a plurality of second bolt fasteners (5), the first bolt fasteners (4) and the second bolt fasteners (5) being diagonally distributed along the axis of the core (3).

5. The electrolytic cell according to claim 1, characterized in that, The core (3) includes a first current collector (31), multiple electrode structures (32) and a second current collector (33) stacked in sequence. The first current collector (31) is attached to the first end plate (1), and the second current collector (33) is attached to the second end plate (2). The multiple electrode structures (32) are stacked in sequence. The first current collector (31) and the second current collector (33) are used to be electrically connected to the positive and negative terminals of the DC power supply, respectively.

6. The electrolytic cell according to claim 5, characterized in that, The electrode structure (32) includes a first sealing gasket (321), a bipolar plate (322), and a second sealing gasket (323) stacked in sequence.

7. The electrolytic cell according to any one of claims 1 to 6, characterized in that, Both the first bolt fastener (4) and the second bolt fastener (5) include a bolt structure (41) and a nut structure (42). The bolt structure (41) passes through the first end plate (1) and the second end plate (2), and at least two of the nut structures (42) are connected to the end of the bolt structure (41).

8. The electrolytic cell according to claim 7, characterized in that, Both the first bolt fastener (4) and the second bolt fastener (5) further include a disc spring (43), which is sleeved on the bolt structure (41). The disc spring (43) is disposed between the first end plate (1) and / or the second end plate (2) and the nut structure (42).

9. The electrolytic cell according to claim 7, characterized in that, Both the first bolt fastener (4) and the second bolt fastener (5) further include an insulating sleeve portion, which is sleeved outside the bolt structure (41).

10. A hydrogen production device, characterized in that, Includes the electrolytic cell as described in any one of claims 1 to 9.

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