PEM electrolytic bath structure for producing hydrogen from pure water

Abstract

The utility model belongs to the technical field of electrolytic baths, and particularly relates to a pure water hydrogen production PEM electrolytic bath structure which comprises an anode plate and a cathode plate, the anode plate is provided with an oxygen outlet and a water inlet, the water inlet is fixedly provided with a first connecting shell and a second connecting shell, the first connecting shell is symmetrically provided with connecting assemblies, and the second connecting shell is fixedly provided with a second connecting shell. A filter screen is arranged on the frame and located on one side of the water inlet. According to the utility model, pure water can be conveniently filtered by the filter screen, tiny impurities in the pure water can be intercepted by the filter screen, water flow containing the impurities is prevented from entering the electrolytic bath, when the filter screen is regularly cleaned, the first connecting shell is detached from the second connecting shell by operating the connecting assembly, and then the frame is pulled to move out of the second connecting shell, so that the filter screen is cleaned; the filter screen is arranged on the filter screen to clean impurities on the filter screen, blockage of the filter screen caused by impurity accumulation is avoided, adverse effects of mechanical impurities possibly contained in pure water on the electrolysis process are avoided by filtering the pure water, and the purity of hydrogen produced by the electrolytic bath is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyzers, in particular to a pure water hydrogen production PEM electrolyzer structure. Background Art

[0002] The pure water hydrogen production PEM electrolyzer is a device that produces hydrogen by electrolyzing pure water. Its core components include proton exchange membrane, anode, cathode, bipolar plate, catalyst layer and current collector. The pure water hydrogen production PEM electrolyzer can produce high-purity hydrogen, which is suitable for use in combination with intermittent renewable energy sources such as wind power and solar energy. It can also provide hydrogen for fuel cell vehicles or be used in metal processing and chemical production. PEM electrolyzer has important potential in the hydrogen energy economy. With technological advancement and cost reduction, it has broad application prospects in the future.

[0003] Patent document CN216838211U discloses a multi-stage PEM electrolyzer structure for electrolyzing water, "comprising a lower end plate (1) and an upper end plate (4) with a water inlet (2) and an outlet (3), at least two groups of unit mechanisms are stacked between the lower end plate (1) and the upper end plate (4), each two groups of unit mechanisms are arranged opposite to each other, and a bipolar plate (14) is arranged between adjacent unit mechanisms, and the lower end plate (1), the unit mechanism and the upper end plate (4) are fixed by bolts (5). The utility model has the advantages of simple structure, reliable use and low cost. It effectively prevents the collapse of the channel and avoids the occurrence of flow channel blockage. At the same time, it also improves the sealing effect. , preventing the occurrence of hydrogen and oxygen cross-talk problems and ensuring the normal operation of the electrolyzer". However, the multi-stage PEM electrolyzer structure for electrolyzing water in the above-mentioned public documents mainly considers preventing the collapse of the channel and avoiding the occurrence of flow channel blockage. It does not take into account that when pure water enters the PEM electrolyzer, the water may contain mechanical impurities, such as iron substances, nickel skin, asbestos fiber, asbestos rubber residue, etc. These impurities will have an adverse effect on the electrolysis process, so that the gas and liquid pipelines of the electrolyzer are blocked, thereby causing a short circuit in the tank or reducing the electrolysis efficiency of the electrolyzer. Therefore, it is necessary to develop a pure water hydrogen production PEM electrolyzer structure, which can filter the pure water entering the electrolyzer. Utility Model Content

[0004] The utility model aims to provide a pure water hydrogen production PEM electrolyzer structure to solve the technical problem that impurities contained in pure water may damage the electrolyzer as mentioned in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a pure water hydrogen production PEM electrolyzer structure, comprising an anode plate and a cathode plate, an electrolysis unit is arranged between the anode plate and the cathode plate, an oxygen outlet and a water inlet are arranged on the anode plate, and a hydrogen outlet is arranged on the cathode plate;

[0006] A No. 1 connecting shell and a No. 2 connecting shell are fixedly installed on the water inlet, a connecting component is symmetrically installed on the No. 1 connecting shell, and the No. 1 connecting shell and the No. 2 connecting shell are detachably connected through the connecting component, an installation groove is arranged around the inner wall of the No. 2 connecting shell, a second magnet is fixedly installed on the installation groove, the second magnet is magnetically connected to the first magnet, a frame is fixedly connected to the first magnet, a filter is arranged on the frame, and the filter is located on one side of the water inlet.

[0007] Preferably, the connecting assembly includes a connecting block, a spring, a clamping block, a square groove, a connecting groove and a clamping slot, the connecting block is fixedly mounted on the cross-section of a connecting shell No. 1, the spring is fixedly mounted inside the connecting block, the clamping block is fixedly mounted on one end of the spring, the square groove is arranged on the connecting block, and one end of the clamping block extends out of the interior of the connecting block through the square groove, the connecting groove is symmetrically arranged on the cross-section of a connecting shell No. 2, the clamping slot is arranged on the connecting shell No. 2, and the clamping slot is communicated with the connecting groove, and the connecting block is clamped in the connecting groove through the clamping block.

[0008] Preferably, a groove is arranged around the cut surface of the second connecting shell, a sealing ring is snap-connected in the groove, and the sealing ring is fixedly mounted on the cut surface of the first connecting shell.

[0009] Preferably, pull rings are symmetrically mounted on the frame, and a sealing ring is also fixedly mounted on the frame.

[0010] Preferably, both the anode plate and the cathode plate are provided with flow channels, and the flow channels are wedge-shaped.

[0011] Preferably, the anode plate and the cathode plate are both provided with connectors, and the connectors are fixedly connected to the top ends of the anode plate and the cathode plate.

[0012] Preferably, a plurality of connecting rods are connected to the anode plate, and the anode plate and the cathode plate are connected by the connecting rods.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is convenient for filtering pure water by installing a filter. The pure water entering the electrolytic cell through the water inlet will first pass through the filter, which will intercept tiny impurities in the pure water to prevent the water containing impurities from entering the electrolytic cell and reducing the electrolysis efficiency of the electrolytic cell. When the filter is cleaned regularly, the No. 1 connection shell is removed from the No. 2 connection shell by operating the connection assembly, and then the frame is pulled out of the No. 2 connection shell by the pull ring to clean the impurities on the filter. After cleaning, the frame is put back into the No. 2 connection shell, and the magnetic connection between the first magnet and the second magnet makes the frame stably located in the No. 2 connection shell to filter the pure water, avoiding the accumulation of impurities and causing the filter to be blocked, thereby improving the filtering effect of the filter on pure water. Filtering pure water avoids the adverse effects of mechanical impurities that may be contained in the pure water on the electrolysis process, thereby improving the purity of hydrogen produced by the electrolytic cell.

[0015] 2. The utility model facilitates improving the hydrogen production efficiency of the electrolyzer by installing a wedge-shaped flow channel. The flow channel has a unique wedge-shaped geometric structure design. The wedge-shaped flow channel can optimize the flow pattern of the liquid in the electrolyzer, reduce eddy currents and turbulence, and allow the electrolyte to flow more evenly over the electrode surface, thereby improving the current density and electrolysis efficiency. At the same time, the design of the wedge-shaped flow channel can increase the contact area between the liquid and the electrode surface, which helps to speed up the transmission speed of ions, increase the generation rate of hydrogen, and also help to better distribute heat in the electrolyzer, avoiding the problem of electrode material degradation or decreased hydrogen production caused by local overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the No. 1 connection shell and the No. 2 connection shell of the utility model;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the structure in the middle;

[0019] Figure 4 It is a schematic diagram of the connection structure between the filter screen and the second connection shell of the utility model;

[0020] Figure 5 It is a schematic diagram of the spring structure of the utility model;

[0021] Figure 6 It is a schematic diagram of the flow channel structure of the utility model.

[0022] In the figure: 1. anode plate; 2. cathode plate; 3. electrolysis unit; 4. oxygen outlet; 5. water inlet; 6. hydrogen outlet; 7. No. 1 connecting shell; 8. No. 2 connecting shell; 9. mounting groove; 10. frame; 11. filter screen; 12. first magnet; 13. second magnet; 14. connecting block; 15. connecting groove; 16. spring; 17. clamping block; 18. square groove; 19. clamping groove; 20. sealing ring; 21. pull ring; 22. flow channel; 23. connector; 24. connecting rod; 25. groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A pure water hydrogen production PEM electrolyzer structure includes an anode plate 1 and a cathode plate 2, an electrolysis unit 3 is arranged between the anode plate 1 and the cathode plate 2, an oxygen outlet 4 and a water inlet 5 are arranged on the anode plate 1, and a hydrogen outlet 6 is arranged on the cathode plate 2. A connector 23 is arranged on the anode plate 1 and the cathode plate 2, and the connector 23 is fixedly connected to the top of the anode plate 1 and the cathode plate 2. A plurality of connecting rods 24 are connected to the anode plate 1, and the anode plate 1 and the cathode plate 2 are connected by the connecting rods 24. When the pure water hydrogen production PEM electrolyzer is used, pure water will enter the PEM electrolyzer through the water inlet 5, and water molecules will undergo oxidation reaction on the anode plate 1 side, lose electrons, and generate oxygen and protons, and then the electrons are transferred to the cathode plate 2 through the external circuit. Under the action of the electric field, the protons are conducted to the cathode plate 2 through the proton exchange membrane in the electrolysis unit 3, and a reduction reaction occurs on the side of the cathode plate 2 to obtain electrons to generate hydrogen. The hydrogen and oxygen after the reaction will be collected by the bipolar plates of the anode and cathode and transported to the outside through the oxygen outlet 4 and the hydrogen outlet 6. However, when pure water enters the PEM electrolyzer, the water may contain mechanical impurities, such as iron substances, nickel skin, asbestos fibers, asbestos rubber residues, etc. These impurities will have an adverse effect on the electrolysis process, so that the gas and liquid pipelines of the electrolyzer are blocked, thereby causing a short circuit in the tank or reducing the electrolysis efficiency of the electrolyzer.

[0025] A No. 1 connecting shell 7 and a No. 2 connecting shell 8 are fixedly installed on the water inlet 5, a connecting assembly is symmetrically installed on the No. 1 connecting shell 7, and the No. 1 connecting shell 7 and the No. 2 connecting shell 8 are detachably connected through the connecting assembly, a mounting groove 9 is arranged around the inner wall of the No. 2 connecting shell 8, a second magnet 13 is fixedly installed on the mounting groove 9, a first magnet 12 is magnetically connected to the second magnet 13, a frame 10 is fixedly connected to the first magnet 12, a filter screen 11 is arranged on the frame 10, and the filter screen 11 is located on one side of the water inlet 5. When the pure water entering the electrolytic cell is filtered, the pure water filtering effect inside the electrolytic cell is improved by installing the filter screen 11 which is easy to disassemble. The pure water entering the electrolytic cell through the water inlet 5 will first pass through the filter screen 11, and the filter screen 11 will remove tiny impurities in the pure water. The filter 11 is cleaned regularly by operating the connection assembly to remove the No. 1 connection shell 7 from the No. 2 connection shell 8, and then the frame 10 is pulled out of the No. 2 connection shell 8 by the pull ring 21 to clean the impurities on the filter 11. After cleaning, the frame 10 is put back into the No. 2 connection shell 8, and the magnetic connection between the first magnet 12 and the second magnet 13 makes the frame 10 stably located in the No. 2 connection shell 8 to filter the pure water, avoiding the accumulation of impurities and causing the filter 11 to be blocked, thereby improving the filtering effect of the filter 11 on pure water, filtering the pure water to avoid the adverse effects of mechanical impurities that may be contained in the pure water on the electrolysis process, and improving the purity of hydrogen produced by the electrolyzer.

[0026] See also Figure 2 and Figure 3 The connecting assembly includes a connecting block 14, a spring 16, a clamping block 17, a square groove 18, a connecting groove 15 and a clamping groove 19. The connecting block 14 is fixedly mounted on the section of the No. 1 connecting shell 7. The spring 16 is fixedly mounted inside the connecting block 14. The clamping block 17 is fixedly mounted on one end of the spring 16. The square groove 18 is arranged on the connecting block 14, and one end of the clamping block 17 extends out of the interior of the connecting block 14 through the square groove 18. The connecting groove 15 is symmetrically arranged on the section of the No. 2 connecting shell 8. The clamping groove 19 is arranged on the No. 2 connecting shell 8. On, the card slot 19 is connected with the connecting slot 15, and the connecting block 14 is engaged in the connecting slot 15 through the card block 17. When the No. 1 connecting shell 7 is connected to the No. 2 connecting shell 8, an external force is first applied to the card block 17 to make it shrink into the connecting block 14, and then the connecting block 14 is pushed to enter the connecting slot 15. Finally, when the card block 17 moves to the card slot 19, the spring 16 is not suppressed by the external force and quickly resets. At the same time, it drives the card block 17 to pass through the card slot 19, so that the No. 1 connecting shell 7 and the No. 2 connecting shell 8 are connected and fixed.

[0027] See also Figure 3The cut surface of the No. 2 connecting shell 8 is surrounded by a groove 25, and a sealing ring 20 is snap-connected in the groove 25, and the sealing ring 20 is fixedly installed on the cut surface of the No. 1 connecting shell 7. When the No. 1 connecting shell 7 and the No. 2 connecting shell 8 are connected, the sealing ring 20 will be snap-connected with the groove 25 to seal the connecting gap to prevent water stains from overflowing from the gap.

[0028] See also Figure 4 A pull ring 21 is symmetrically mounted on the frame 10, and a sealing ring 20 is also fixedly mounted on the frame 10. The pull ring 21 is used to pull the frame 10 out of the second connecting shell 8 to bring the filter screen 11 out to the outside, so as to clean the filter screen 11.

[0029] See also Figure 6 A flow channel 22 is provided on both the anode plate 1 and the cathode plate 2, and the flow channel 22 is wedge-shaped. When the hydrogen production efficiency of the electrolyzer is improved, the wedge-shaped flow channel 22 is provided to facilitate improving the hydrogen production efficiency of the electrolyzer. The flow channel 22 is designed with a unique wedge-shaped geometric structure. The wedge-shaped flow channel 22 can optimize the flow pattern of the liquid in the electrolyzer, reduce eddy currents and turbulence, and allow the electrolyte to flow more evenly over the electrode surface, thereby improving the current density and electrolysis efficiency. At the same time, the design of the wedge-shaped flow channel 22 can increase the contact area between the liquid and the electrode surface, which helps to speed up the transmission speed of ions, increase the generation rate of hydrogen, and also help to better distribute heat in the electrolyzer, avoiding the problem of electrode material degradation or decreased hydrogen production caused by local overheating.

[0030] Working principle: when filtering the pure water entering the electrolytic cell, the filter screen 11 which is easy to disassemble is installed to improve the filtering effect of the pure water inside the electrolytic cell. The pure water entering the electrolytic cell through the water inlet 5 will first pass through the filter screen 11. The filter screen 11 will intercept the tiny impurities in the pure water to prevent the water flow containing impurities from entering the electrolytic cell and reducing the electrolysis efficiency of the electrolytic cell. When cleaning the filter screen 11 regularly, the No. 1 connecting shell 7 is removed from the No. 2 connecting shell 8 by operating the connecting assembly, and then the frame 10 is pulled out of the No. 2 connecting shell 8 by the pull ring 21 to clean the impurities on the filter screen 11. After cleaning, the frame 10 is put back into the No. 2 connecting shell 8, and the frame 10 is stably located in the No. 2 connecting shell 8 through the magnetic connection between the first magnet 12 and the second magnet 13 to filter the pure water to avoid impurities accumulation. The filter 11 is blocked, which improves the filtering effect of the filter 11 on pure water. Filtering pure water avoids the adverse effects of mechanical impurities that may be contained in the pure water on the electrolysis process, thereby improving the purity of hydrogen produced by the electrolyzer. When improving the hydrogen production efficiency of the electrolyzer, the wedge-shaped flow channel 22 is provided to facilitate improving the hydrogen production efficiency of the electrolyzer. The flow channel 22 has a unique wedge-shaped geometric structure design. The wedge-shaped flow channel 22 can optimize the flow pattern of the liquid in the electrolyzer, reduce eddy currents and turbulence, and allow the electrolyte to flow more evenly over the electrode surface, thereby improving the current density and electrolysis efficiency. At the same time, the design of the wedge-shaped flow channel 22 can increase the contact area between the liquid and the electrode surface, which helps to speed up the transmission speed of ions, increase the hydrogen generation rate, and also help to better distribute heat in the electrolyzer, avoiding the problem of electrode material degradation or decreased hydrogen production caused by local overheating.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A pure water hydrogen production PEM electrolyzer structure, comprising an anode plate (1) and a cathode plate (2), characterized in that: An electrolysis unit (3) is arranged between the anode plate (1) and the cathode plate (2); an oxygen outlet (4) and a water inlet (5) are arranged on the anode plate (1); and a hydrogen outlet (6) is arranged on the cathode plate (2); A first connecting shell (7) and a second connecting shell (8) are fixedly mounted on the water inlet (5); a connecting assembly is symmetrically mounted on the first connecting shell (7); and the first connecting shell (7) and the second connecting shell (8) are detachably connected via the connecting assembly; an installation groove (9) is arranged around the inner wall of the second connecting shell (8); a second magnet (13) is fixedly mounted on the installation groove (9); a first magnet (12) is magnetically connected to the second magnet (13); a frame (10) is fixedly connected to the first magnet (12); a filter screen (11) is arranged on the frame (10), and the filter screen (11) is located on one side of the water inlet (5).

2. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: The connection assembly comprises a connection block (14), a spring (16), a clamping block (17), a square groove (18), a connection groove (15) and a clamping groove (19); the connection block (14) is fixedly mounted on a section of a No. 1 connection shell (7); the spring (16) is fixedly mounted inside the connection block (14); the clamping block (17) is fixedly mounted on one end of the spring (16); the square groove (18) is arranged on the connection block (14); one end of the clamping block (17) extends out of the interior of the connection block (14) through the square groove (18); the connection groove (15) is symmetrically arranged on a section of a No. 2 connection shell (8); the clamping groove (19) is arranged on the No. 2 connection shell (8); the clamping groove (19) is connected to the connection groove (15); and the connection block (14) is clamped in the connection groove (15) through the clamping block (17).

3. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: The cut surface of the second connecting shell (8) is surrounded by a groove (25), a sealing ring (20) is snap-connected in the groove (25), and the sealing ring (20) is fixedly mounted on the cut surface of the first connecting shell (7).

4. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: A pull ring (21) is symmetrically mounted on the frame (10), and a sealing ring (20) is also fixedly mounted on the frame (10).

5. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: The anode plate (1) and the cathode plate (2) are both provided with flow channels (22), and the flow channels (22) are wedge-shaped.

6. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: The anode plate (1) and the cathode plate (2) are both provided with a connector (23), and the connector (23) is fixedly connected to the top of the anode plate (1) and the cathode plate (2).

7. A pure water hydrogen production PEM electrolyzer structure according to claim 1, characterized in that: The anode plate (1) is connected to a plurality of groups of connecting rods (24), and the anode plate (1) and the cathode plate (2) are connected via the connecting rods (24).

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