Alkaline water electrolysis cell with cooling

Abstract

The utility model relates to the technical field of alkaline water hydrogen production electrolytic cell, specifically to a kind of alkaline water hydrogen production electrolytic cell with cooling device, including the end pole plate of alkaline water hydrogen production electrolytic cell, cooling cavity being arranged in the inside of end pole plate, the cooling cavity in the inside of end pole plate is connected with circulating cooling system;Further improved scheme also includes in the inside cooling cavity being connected with circulating cooling system in intermediate pole plate is set to the scheme of the utility model can reduce the temperature of end pole plate and intermediate pole plate place sealing washer, to improve the compression strength of this sealing washer, solve end pole plate and intermediate pole plate place sealing washer more easily failure, damage problem, improve the working reliability of alkaline water hydrogen production electrolytic cell, and effectively prolong the service life of alkaline water hydrogen production electrolytic cell.

Description

Technical Field

[0001] This utility model relates to the technical field of alkaline water hydrogen production electrolyzers, specifically to an alkaline water hydrogen production electrolyzer with a cooling device. Background Technology

[0002] An alkaline water electrolyzer is a device that produces hydrogen by electrolyzing alkaline water. Its basic principle is to generate hydrogen and oxygen at the cathode and anode of the electrolyzer by electrolyzing an alkaline aqueous solution. Traditional alkaline water electrolyzers typically use a 30% potassium hydroxide solution or a 26% sodium hydroxide solution as the electrolyte, offering advantages such as mature technology, rich operational experience, and low cost. Currently, industrially produced electrolyzers are structurally divided into circular and square types, and are available in pressurized, slightly positive pressure, and atmospheric pressure configurations, with circular pressurized electrolyzers having the highest market share.

[0003] Figure 1 A typical alkaline water-to-hydrogen electrolyzer includes a number of electrode components assembled by stacking. Sealing gaskets are provided between adjacent electrode components. Among the stacked electrode components, the electrode components located at both ends of the electrolyzer's axial direction are called end plates, and the electrode components located between two end plates are called electrode plates or biplates. The electrode plate located in the middle of the alkaline water-to-hydrogen electrolyzer is used for the inlet and outlet of the alkaline solution and is conventionally called the intermediate electrode plate.

[0004] The aforementioned alkaline water-to-hydrogen electrolyzer has end plates at both ends of the assembled electrode components to press the assembled electrode components and sealing gaskets together. The assembly is axially clamped by tension bolts, disc springs, and lock nuts. Inside the assembled electrolyzer, electrolysis chambers are formed between adjacent electrode plates. These chambers are separated into anode and cathode chambers by diaphragms.

[0005] The aforementioned alkaline water-to-hydrogen electrolyzer is composed of a number of electrolysis chambers connected in series. Due to the overpotential and ohmic resistance of the electrodes, the electrical energy flowing into the electrolyzer is converted into heat energy, except for the energy used to produce hydrogen and oxygen. The heat energy converted from electrical energy exceeding the thermal neutral voltage of 1.48V is carried out of the electrolyzer for cooling by the temperature rise of the alkaline solution (electrolyte) circulating between the chambers. In order to maintain the catalytic activity of the electrodes, the electrolyzer often operates at a relatively high temperature.

[0006] Currently, alkaline water electrolyzers for hydrogen production are mainly used in green energy hydrogen production scenarios such as photovoltaic and wind power generation. Due to the limitations of the natural conditions of green energy, the load supplying the electrolyzers is intermittent and fluctuates significantly, causing the electrolyzers to operate in an unstable state with frequent start-stop cycles and large load fluctuations. This results in frequent changes in the temperature and pressure of the electrolyzers, and the length of the electrolyzers frequently elongates and shortens due to thermal expansion and contraction and pressure changes. To maintain a reliable seal of the electrolyzer despite length changes, disc springs and lock nuts are installed at both ends of the electrolyzer tensioning bolts. The length of the electrolyzer is compensated by increasing or decreasing the compression of the disc springs. Increased disc spring compression increases the surface pressure applied to each sealing gasket; conversely, decreased disc spring compression decreases the surface pressure applied to each sealing gasket. This ensures that the sealing gaskets are constantly under varying surface pressure. Moreover, due to the lag in force transmission, the sealing gaskets closer to the ends of the electrolyzer are more sensitive to changes in pressure.

[0007] The sealing gaskets in current alkaline water hydrogen production electrolyzers are all made of modified polytetrafluoroethylene (PTFE). However, the physical properties of PTFE mean it softens rapidly with increasing temperature. For example, the compressive strength of pure PTFE is 7–14 MPa at 20°C, but drops to 3–7 MPa at 100°C; modified PTFE has similar physical properties.

[0008] Furthermore, through long-term operational observation and project problem analysis of the alkaline water hydrogen production electrolyzer, the applicant discovered that the gaskets near the end plates and intermediate plates in the alkaline water hydrogen production electrolyzer are more prone to failure than the gaskets located between the other plates. Further analysis revealed two reasons for this: First, the end plates and intermediate plates use thicker steel plates than other plates, resulting in greater heat storage and superior heat transfer performance. This leads to more heat being conducted to the gaskets, causing them to soften before those between other plates. All the thermal expansion of the electrolyzer is concentrated on this weak point, causing gasket failure. Second, the forces generated by thermal expansion and contraction, and pressure changes, causing variations in the compression of the disc springs, are sequentially transmitted to each gasket. The gaskets at the ends bear the greatest force first, making their stress condition more severe than other gaskets, thus accelerating their damage. The combined effect of these two reasons is the root cause of the easy failure of the sealing gaskets near the end plates and intermediate plates.

[0009] Therefore, how to prevent the failure and damage of sealing gaskets in alkaline water hydrogen production electrolyzers, especially the problem that sealing gaskets near the end plates and intermediate plates are more prone to failure and damage, is one of the technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0010] To address the aforementioned problems, this invention proposes an alkaline water hydrogen production electrolyzer with a cooling device. This device aims to reduce the temperature of the sealing gaskets near the end plates and intermediate plates, thereby increasing the compressive strength of the gaskets at these locations. This solves the problem of easier failure and damage to the sealing gaskets at the end plates and intermediate plates, improves the operational reliability of the alkaline water hydrogen production electrolyzer, and effectively extends its service life. The specific technical solution is as follows:

[0011] An alkaline water hydrogen production electrolyzer with a cooling device is provided with cooling chambers in the end plates located at both ends of the alkaline water hydrogen production electrolyzer, or cooling chambers are provided in both the end plates and the intermediate plate located at both ends of the alkaline water hydrogen production electrolyzer; wherein, the cooling chambers are connected to a circulating cooling system.

[0012] Furthermore, the cooling chambers of the end plates and intermediate plates of the alkaline water hydrogen production electrolyzer are located axially adjacent to the sealing gasket.

[0013] Furthermore, the cooling chambers within the end plates and intermediate plates of the alkaline water hydrogen production electrolyzer are arranged in a closed ring at axially adjacent positions where they meet the sealing gaskets. This is used to cool the sealing gaskets pressed against their end faces, thereby ensuring that the compressive strength of the sealing gaskets pressed against the end faces of the end plates and intermediate plates is greater than that of the sealing gaskets located between the other plates.

[0014] Furthermore, the outer edges of the end plates and intermediate plates of the alkaline water hydrogen production electrolyzer are respectively provided with coolant inlets and coolant outlets that communicate with the cooling chambers inside the end plates and intermediate plates, and the coolant inlets and coolant outlets are connected to the circulating cooling system through pipelines.

[0015] As one of the preferred solutions of the circulating cooling system in this utility model, the circulating cooling system of the alkaline water hydrogen production electrolyzer is a circulating cooling system using a heat exchanger, which includes cooling circulation pipelines connected to the coolant inlet and coolant outlet corresponding to the outer edge of the end plate and the intermediate plate, a coolant circulation pump and a heat exchanger respectively installed on the cooling circulation pipeline.

[0016] Furthermore, the circulating liquid used in the circulating cooling system of the alkaline water hydrogen production electrolyzer is a non-conductive material; at the same time, the pipes connecting the circulating cooling system and the electrolyzer are insulated pipes.

[0017] Preferably, the heat exchanger is connected to a pipeline from the circulating cooling water of the utility works to achieve heat exchange.

[0018] Preferably, the coolant in the circulating cooling system can be deionized water, silicone oil, ethanol, or other non-conductive fluids.

[0019] Furthermore, the selection of the coolant takes into account compatibility with the materials in the circulating cooling system and does not cause corrosion to the system materials.

[0020] By activating the circulating cooling system, coolant is introduced into the cooling chambers inside the end plates and intermediate plates of the alkaline water hydrogen production electrolyzer. This removes localized heat from the gaskets near the end plates and intermediate plates, thus cooling the gaskets. This ensures that the temperature of the gasket at that location is always lower than that of the gaskets in other locations, thereby increasing the compressive strength of the gasket at that location compared to the gaskets in other locations, and achieving the purpose of resisting pressure changes.

[0021] In this invention, the heat carried out by the cooling chamber is carried out of the circulating cooling system through a heat exchanger.

[0022] In this invention, the pipeline connecting the circulating cooling system to the electrolytic cell is a non-conductive insulated pipeline, and the coolant used in the circulating cooling system is also non-conductive.

[0023] As a second preferred embodiment of the circulating cooling system in this utility model, the circulating cooling system is a circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange. The cooling method of the circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange is as follows: the low-temperature circulating alkaline solution to be introduced into the alkaline water hydrogen production electrolyzer is first introduced into the cooling chamber of the end plate and the intermediate plate to remove heat, and then enters the electrolyzer to carry out the electrolysis reaction, so as to cool down the sealing gasket that is pressed against the end face of the end plate and the intermediate plate.

[0024] Preferably, the circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange includes an alkaline solution circulating pump of the hydrogen production system. The alkaline solution output end of the alkaline solution circulating pump is connected to the coolant inlet on the end plate and the intermediate plate through a pipeline. After the heat is carried away by the cooling chamber, the coolant outlet on the end plate and the intermediate plate is connected to the interior of the alkaline water hydrogen production electrolyzer through a pipeline.

[0025] Preferably, a partition is provided inside the cooling chamber arranged in a closed annular pattern inside the end plate and the intermediate plate, and the coolant inlet and coolant outlet are respectively located on both sides of the partition on the end plate and the intermediate plate.

[0026] The above-mentioned technical solution of this utility model focuses on solving the failure problem of the sealing gasket located at the weakest point among all the sealing gaskets in an alkaline water hydrogen production electrolyzer. By setting cooling chambers inside the end plates and intermediate plates, the temperature environment of the sealing gaskets pressed against the end plates and intermediate plates is improved, thereby increasing the service life of the sealing gaskets at these locations. Therefore, by setting cooling chambers only on the end plates and intermediate plates, and not on the other plates, the problem of the weakest link in the "barrel theory" (i.e., the problem of early failure of the entire electrolyzer due to early damage to the sealing gaskets at the end plates and intermediate plates) is addressed. This makes the service life of the sealing gaskets pressed against the end plates and intermediate plates approach or exceed the service life of the sealing gaskets located between the other plates, thereby greatly improving the overall service life of the alkaline water hydrogen production electrolyzer.

[0027] The beneficial effects of this utility model are:

[0028] First, the alkaline water hydrogen production electrolyzer of this utility model, by setting cooling chambers in the end plates and intermediate plates of the alkaline water hydrogen production electrolyzer, cools the sealing gaskets pressed against the end faces of the end plates and intermediate plates, thereby making the compressive strength of the sealing gaskets at these locations higher than that of the sealing gaskets in other locations. This solves the problem that the sealing gaskets at the end plates and intermediate plates are more prone to failure and damage, improves the working reliability of the alkaline water hydrogen production electrolyzer, and effectively extends the overall service life of the alkaline water hydrogen production electrolyzer.

[0029] Secondly, the alkaline water hydrogen production electrolyzer with cooling device of this utility model adopts a circulating cooling system with heat exchanger heat exchange. Its cooling circulation pipeline is a non-conductive insulated pipeline, and the coolant is a non-conductive fluid, which further improves the operating safety and working reliability of the electrolyzer.

[0030] Third, the alkaline water hydrogen production electrolyzer with cooling device of this utility model utilizes the circulating alkaline solution of the hydrogen production system for heat exchange in a circulating cooling system. It does not require a dedicated heat exchanger. While cooling down the sealing gaskets at the end plates and intermediate plates and improving the service life of the sealing gaskets, it also saves the purchase cost of heat exchangers and coolant circulation pumps, and reduces the energy consumption of heat exchange, thus exhibiting good energy efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an alkaline water hydrogen production electrolyzer in the prior art;

[0032] Figure 2 Yes Figure 1 The present invention relates to an alkaline water hydrogen production electrolyzer with a cooling device, which is an improved alkaline water hydrogen production electrolyzer. The end plate of the end plate is provided with a cooling cavity inside the electrode frame part used to press the sealing gasket. Figure 2 The view is a two-view diagram, with the left part being the main view and the right part being the left view of the main view.

[0033] Figure 3 This is a partial enlarged schematic diagram showing the installation position of the cooling chamber of the end plate in an alkaline water hydrogen production electrolyzer with a cooling device according to this utility model.

[0034] Figure 4 This is one of the structural schematic diagrams of a circulating cooling system for an alkaline water hydrogen production electrolyzer with a cooling device according to this utility model (using a heat exchanger).

[0035] Figure 5 This is the second schematic diagram of the circulating cooling system of an alkaline water hydrogen production electrolyzer with a cooling device according to this utility model (using circulating alkaline solution heat exchange method).

[0036] In the diagram: 1. End pressure plate, 2. Insulating plate, 3. End electrode plate, 4. Electrode plate, 5. Sealing gasket, 6. Oxygen evolution electrode, 7. Hydrogen evolution electrode, 8. Nut, 9. Disc spring, 10. Diaphragm, 11. Insulating sleeve, 12. Tensioning bolt, 13. Cooling chamber, 14. Intermediate electrode plate, 15. Partition, 16. Coolant inlet, 17. Coolant outlet, 18. Cooling circulation pipeline, 19. Coolant circulation pump, 20. Heat exchanger, 21. Alkali solution channel, 22. End face countersunk hole, 23. Through groove, 24. Alkali solution through hole, 25. Electrode plate body of the end electrode plate, 26. Electrode frame of the end electrode plate, 27. Alkali solution circulation pump. Detailed Implementation

[0037] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0038] like Figures 1 to 5 The illustration shows an embodiment of an alkaline water hydrogen production electrolyzer with a cooling device. Cooling chambers 13 are provided at the end plates 3 at both ends of the alkaline water hydrogen production electrolyzer, or cooling chambers are provided simultaneously in the end plates 3 and the intermediate plate 14 at both ends of the alkaline water hydrogen production electrolyzer; wherein, the cooling chambers 13 are connected to a circulating cooling system.

[0039] Furthermore, the cooling chambers 13 of the end plate 3 and the intermediate plate 14 are located in a longitudinally adjacent position at the point where they meet the sealing gasket 5.

[0040] Furthermore, the cooling chambers 13 within the end plate 3 and the intermediate plate 14 are arranged in a closed ring at an axially adjacent position where they meet the sealing gasket 5. This is used to cool the sealing gasket 5 pressed against its end face, thereby ensuring that the compressive strength of the sealing gasket 5 pressed against the end plate 3 and the intermediate plate 14 is greater than that of the sealing gaskets located between the other plates 4.

[0041] Furthermore, coolant inlet 16 and coolant outlet 17 are respectively provided on the outer edge of the end plate 3 and the intermediate plate 14, which are connected to the cooling cavity 13 inside the end plate 3 and the intermediate plate 14. The coolant inlet 16 and coolant outlet 17 are connected to the circulating cooling system through pipelines.

[0042] As one of the preferred solutions of the circulating cooling system in this embodiment, the circulating cooling system is a circulating cooling system using a heat exchanger, which includes a cooling circulation pipeline 18 connected to the coolant inlet 16 and coolant outlet 17 on the end plate 3 and the intermediate plate 14, a coolant circulation pump 19 and a heat exchanger 20 respectively installed on the cooling circulation pipeline 18.

[0043] Furthermore, the circulating liquid used in the circulating cooling system of the alkaline water hydrogen production electrolyzer is a non-conductive material; at the same time, the pipes connecting the circulating cooling system and the electrolyzer are insulated pipes.

[0044] Preferably, the heat exchanger 20 is connected to a pipeline from the circulating cooling water of the utility works to achieve heat exchange.

[0045] Preferably, the coolant in the circulating cooling system can be deionized water, silicone oil, ethanol, or other non-conductive fluids.

[0046] Furthermore, the selection of the coolant takes into account compatibility with the materials in the circulating cooling system and does not cause corrosion to the system materials.

[0047] By activating the circulating cooling system, coolant is introduced into the cooling chamber 13 inside the end plate 3 and intermediate plate 14 of the alkaline water hydrogen production electrolyzer, carrying away the local heat of the sealing gasket 5 near the end plate 3 and intermediate plate 14, thereby cooling the sealing gasket 5. This ensures that the temperature of the sealing gasket 5 at this location is always lower than that of the sealing gaskets 5 in other locations, thus making the compressive strength of the sealing gasket 5 at this location higher than that of the sealing gaskets in other locations, achieving the purpose of resisting pressure changes.

[0048] In this embodiment, the heat carried out by the cooling chamber 13 is carried out of the circulating cooling system through the heat exchanger 20.

[0049] In this embodiment, the pipeline connecting the circulating cooling system to the electrolytic cell is a non-conductive insulated pipeline, and the coolant used in the circulating cooling system is also non-conductive.

[0050] As a second preferred embodiment of the circulating cooling system, the circulating cooling system is a circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange. The cooling method of the circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange is as follows: the low-temperature circulating alkaline solution to be introduced into the alkaline water hydrogen production electrolyzer is first introduced into the cooling chamber 13 of the end plate 3 and the intermediate plate 14 to remove heat, and then enters the electrolyzer to carry out the electrolysis reaction, so as to cool down the sealing gasket 4 pressed against the end face of the end plate 3 and the intermediate plate 14.

[0051] Preferably, the circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange includes an alkaline solution circulating pump 27 of the hydrogen production system. The alkaline solution output end of the alkaline solution circulating pump 27 is connected to the coolant inlet 16 on the end plate 3 and the intermediate plate 14 through a pipeline. After the heat is carried away by the cooling chamber 13, the coolant outlet 17 on the end plate 3 and the intermediate plate 14 is connected to the interior of the alkaline water hydrogen production electrolyzer through a pipeline.

[0052] Preferably, a partition 15 is provided in the cooling cavity 13 arranged in a closed annular pattern inside the end plate 3 and the intermediate plate 14, and the coolant inlet 16 and the coolant outlet 17 are respectively placed on both sides of the partition 15 on the end plate 3 and the intermediate plate 14.

[0053] The technical solution described in this embodiment focuses on solving the failure problem of the sealing gasket located at the weakest point among all the sealing gaskets in an alkaline water hydrogen production electrolyzer. By setting cooling chambers inside the end plate and intermediate plate 14, the temperature environment of the sealing gasket 5 pressed against the end plate 3 and intermediate plate 14 is improved, thereby increasing the service life of the sealing gasket 5 at that location. Therefore, by setting cooling chambers 13 only on the end plate 3 and intermediate plate 14, and not on the other plates 4, the problem of the weakest link in the "barrel theory" (i.e., the problem of early failure of the entire electrolyzer due to early damage to the sealing gasket 5 at the end plate 3 and intermediate plate 14) is addressed. This makes the service life of the sealing gasket 5 pressed against the end plate 3 and intermediate plate 14 close to or exceed the service life of the sealing gaskets located between the other plates 4, thereby greatly improving the overall service life of the alkaline water hydrogen production electrolyzer.

[0054] See Figure 1This is a typical structure for the inlet and outlet of alkaline solution in existing alkaline water electrolyzers, including end plates 1, tension bolts 12, disc springs 9, end plates 3, sealing gaskets 5, plates 4, diaphragms 10, oxygen evolution electrodes 6, hydrogen evolution electrodes 7, etc., and also includes intermediate plates 14 for the inlet and outlet of alkaline solution, hydrogen, and oxygen.

[0055] See Figure 2 and 3 This utility model is relative to Figure 1 The improvement involves incorporating a cooling chamber 13 within the terminal electrode plate 3 and the intermediate electrode plate 14. The cooling chamber 13 is located within the electrode frame 26 of the terminal electrode plate 3 and the intermediate electrode plate 14 (where a sealing gasket 5 is pressed against the end face of the electrode frame 26). The cooling chamber 13 is arranged in a closed annular shape and is not connected to the electrolysis chamber. It is used to cool the sealing gasket 5 pressed against the end face of the electrode frame 26 of the terminal electrode plate 3 and the intermediate electrode plate 14. The cooling chamber 13 has two coolant inlets and outlets at the outer edges of the electrode frames of the terminal electrode plate 3 and the intermediate electrode plate 14 for connection to a circulating cooling system. To ensure that the coolant circulates in an annular manner, a cooling chamber baffle 15 is provided within the annular cooling chamber (see [link to relevant documentation]). Figure 2 ).

[0056] See Figure 2 and 3 The alkaline water hydrogen production electrolyzer also has alkaline channels 21 for alkaline solution entry and exit on the end faces of the end plates 3 and intermediate plates 14. These channels have countersunk holes 22 on the end faces, and through grooves 23 connected to the electrolysis chambers are radially arranged on the countersunk holes 22. In addition, each electrode plate 4 and sealing gasket 5 of the alkaline water hydrogen production electrolyzer also has corresponding alkaline through holes 24 connected to the countersunk holes 22. The alkaline channels 21 connecting the electrolysis chambers are formed by the sequential connection of the alkaline through holes 24, countersunk holes 22, and through grooves 23. The structure of the alkaline channels 21 on the end faces of the end plates 3 and intermediate plates 14 avoids interference with the annular structure space of the cooling chamber 13.

[0057] The aforementioned end plate 3 and intermediate plate 14 include plate bodies 25 of the end plate and intermediate plate 14 and a frame 26 of the end plate and intermediate plate 14 connected to the outer edge of the plate bodies 25. Their structure can be integral or assembled / welded. For example, when the end plate and intermediate plate 14 adopt an assembled / welded structure, an annular groove can be formed circumferentially on the inner surface of the frame 26. A partition 15 is first welded into the annular groove, and then the outer circle of the plate bodies 25 of the end plate and intermediate plate 14 is fitted into the inner hole of the frame 26, thereby sealing the opening of the annular groove at the inner hole of the frame 26. A closed annular cooling cavity 13 is then formed by welding.

[0058] See Figure 4This is a technical solution for a circulating cooling system, which consists of a heat exchanger 20, a circulating pump 19, and cooling circulation pipes (insulated pipes), connected to the coolant inlet and outlet 16 and 17 of the end plate 3 and intermediate plate 14 of the electrolyzer. The circulating cooling water, an essential component for hydrogen production via water electrolysis, is also connected to the heat exchange end of the heat exchanger 20. Preferably, the pipes connecting the circulating cooling system to the electrolyzer are non-conductive insulated pipes, and the coolant flowing through them is also non-conductive. The coolant can be deionized water, silicone oil, ethanol, or other non-conductive fluids.

[0059] Operating method: Start the circulating cooling system and pass the coolant into the cooling chamber 13 in the end plate 3 and the intermediate plate 14 of the alkaline water hydrogen production electrolyzer. This coolant carries away the local heat of the sealing gasket 5 at the electrode frame of the end plate 3 and the intermediate plate 14, thereby cooling the sealing gasket 5. The heat carried out by the cooling chamber 13 is carried away by the circulating cooling water of the utility through the heat exchanger 20, thus achieving the cooling of the circulating cooling water.

[0060] See Figure 5 Another technical solution for the circulating cooling system is that the electrolyte output by the alkaline circulating pump 27 used to realize the circulation of alkaline solution in the alkaline water hydrogen production electrolyzer does not directly enter the electrolyzer. Instead, it first enters the cooling chamber 13 inside the end plate 3 and the intermediate plate 14 through the pipeline to cool the sealing gasket at the electrode frame 26 pressed against the end plate 3 and the intermediate plate 14. Then, it comes out from the cooling chamber 13 of the end plate 3 and the intermediate plate 14 and enters the electrolyzer through the pipeline from the intermediate plate 14.

[0061] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An alkaline water-to-hydrogen electrolyzer with a cooling device, characterized in that, A cooling chamber is provided in the end plates at both ends of the alkaline water hydrogen production electrolyzer, or a cooling chamber is provided in both the end plates and the intermediate plate at both ends of the alkaline water hydrogen production electrolyzer; wherein the cooling chamber is connected to a circulating cooling system.

2. The alkaline water hydrogen production electrolyzer with a cooling device according to claim 1, characterized in that, The cooling chambers of the end plates and intermediate plates are located axially adjacent to the sealing gaskets.

3. The alkaline water hydrogen production electrolyzer with a cooling device according to claim 2, characterized in that, The cooling chambers within the end plates and intermediate plates are arranged in a closed ring at axially adjacent positions where they meet the sealing gaskets. These chambers are used to cool the sealing gaskets pressed against their end faces, thereby ensuring that the compressive strength of the sealing gaskets pressed against the end faces of the end plates and intermediate plates is greater than that of the sealing gaskets located between the other plates.

4. The alkaline water hydrogen production electrolyzer with a cooling device according to claim 3, characterized in that, Coolant inlets and coolant outlets are respectively provided on the outer edges of the end plate and the intermediate plate, which are connected to the cooling chambers inside the end plate and the intermediate plate. The coolant inlets and coolant outlets are connected to the circulating cooling system through pipelines.

5. An alkaline water hydrogen production electrolyzer with a cooling device according to claim 4, characterized in that, The circulating cooling system is a circulating cooling system that uses a heat exchanger for heat exchange. It includes cooling circulation pipelines connected to the coolant inlet and coolant outlet on the end plate and intermediate plate, a coolant circulation pump and a heat exchanger respectively installed on the cooling circulation pipelines.

6. An alkaline water hydrogen production electrolyzer with a cooling device according to claim 5, characterized in that, The circulating fluid used in the circulating cooling system is a non-conductive material; at the same time, the pipes connecting the circulating cooling system to the electrolytic cell are insulated pipes.

7. An alkaline water hydrogen production electrolyzer with a cooling device according to claim 2, characterized in that, The circulating cooling system is a circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange. The cooling method of the circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange is as follows: The low-temperature circulating alkaline solution to be introduced into the alkaline water hydrogen production electrolyzer is first introduced into the cooling chamber of the end plate and the intermediate plate to remove heat, and then enters the electrolyzer to carry out the electrolysis reaction, so as to cool down the sealing gaskets pressed against the end plates and the intermediate plate.

8. An alkaline water hydrogen production electrolyzer with a cooling device according to claim 7, characterized in that, The circulating cooling system that uses the circulating alkaline solution of the hydrogen production system for heat exchange includes an alkaline solution circulating pump of the hydrogen production system. The alkaline solution output end of the alkaline solution circulating pump is connected to the coolant inlet on the end plate and the intermediate plate through a pipeline. After the heat is carried away by the cooling chamber, the coolant outlet on the end plate and the intermediate plate is connected to the interior of the alkaline water hydrogen production electrolyzer through a pipeline.

9. An alkaline water hydrogen production electrolyzer with a cooling device according to claim 4, characterized in that, The cooling chambers arranged in a closed ring inside the end plates and intermediate plates are equipped with partitions. The coolant inlet and coolant outlet are respectively located on both sides of the partitions on the end plates and intermediate plates.

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