Water electrolysis hydrogen production electrolytic cell model adopting columnar elastic electrode supporting piece

Abstract

The utility model discloses a water electrolysis hydrogen production electrolytic cell model adopting a columnar elastic electrode supporting piece, which comprises two relatively fixed electrode inner frames, electrode plates are arranged in the two electrode inner frames, and the electrode plates and the electrode inner frames are matched to form a single-side small-scale test space. Electrode supporting columns and spring thimbles are arranged on the electrode plates in the two single-side small-scale test spaces respectively, the electrode supporting columns and the spring thimbles are oppositely arranged, a cathode net, a diaphragm and an anode net are arranged between the electrode supporting columns and the spring thimbles, and the electrode supporting columns, the cathode net, the diaphragm and the anode net are attached to and abut against one another through the spring thimbles; the diaphragm and the gasket are arranged between the two electrode inner frames, and the electrode inner frames are provided with a liquid inlet channel and an air outlet channel which are communicated with the single-side small test space. The space occupation proportion of the electrode supporting assembly in a small-scale test space is small, gas overflow is facilitated, and the'membrane polar distance 'between the cathode net and the anode net can be kept all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production, in particular to an electrolytic cell model for producing hydrogen by water electrolysis using a columnar elastic electrode support. Background Art

[0002] In conventional water electrolysis hydrogen production electrolyzers and various water electrolysis hydrogen production electrolyzer models, since the electrolysis chamber requires a certain amount of space, strip supports (water electrolysis hydrogen production electrolyzers) or serpentine channels (water electrolysis hydrogen production electrolyzer models) are often used to support the electrodes. These structures can meet basic needs, but since these supports themselves occupy a large space, they will affect the gas discharge, and the supports are in contact with the pole net over a large area, resulting in some "electrolysis dead zones" that affect the electrolysis efficiency. In addition, due to the inevitable component processing errors and the difficult-to-control gasket compression, as well as for the protection of the electrodes and diaphragms, it is difficult to achieve the ideal "membrane distance" between the positive and negative electrodes of the water electrolysis hydrogen production electrolyzer (model), which will cause the electrolysis chamber voltage to be slightly higher than the "membrane distance" state. The power loss caused by these points may be insignificant in small-scale and short-term production, but from the perspective of the entire industry and long-term production, it will cause a huge waste of energy.

[0003] In general, the water electrolysis hydrogen production electrolyzer model mainly includes the following disadvantages:

[0004] 1. The electrode support has a large volume, which occupies more space in the electrolysis chamber and will affect gas discharge to a certain extent.

[0005] 2. The electrode support is in contact with the electrode grid over a large area, resulting in a large number of "electrolysis dead zones", which affects the electrolysis efficiency.

[0006] 3. The manufacture of gaskets is affected by many conditions. The parameters of the gaskets actually manufactured may be different from the empirical parameters given by the gasket manufacturer, and the gasket compression obtained by calculation and simulation is different from the actual compression. The working temperature of the electrolytic cell will rise from room temperature to about 90 degrees Celsius, and the gasket will also expand due to heat. Therefore, it is difficult to obtain an accurate value for the actual compression of the gasket. In summary, coupled with the processing errors of the electrolytic cell components, it is difficult to achieve the ideal state of "membrane distance" between the anode and cathode electrodes, resulting in additional cell voltage in the electrolytic cell. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide a water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support. The electrode support assembly occupies a relatively small proportion of the space in the small test space, which is conducive to gas overflow and can also always maintain the "membrane distance" between the anode and cathode grids.

[0008] In order to solve the above technical problems, the utility model provides an electrolytic cell model for producing hydrogen by water electrolysis using a columnar elastic electrode support, comprising two relatively fixed electrode inner frames, wherein electrode plates are arranged in the two electrode inner frames, and the electrode plates and the electrode inner frames cooperate to form a single-sided small test space, and electrode support columns and spring ejectors are respectively arranged on the electrode plates in the two single-sided small test spaces, wherein the electrode support columns and the spring ejectors are arranged opposite to each other, and a cathode network, a diaphragm and an anode network are arranged between the electrode support columns and the spring ejectors, wherein the cathode network, the diaphragm and the anode network of the electrode support columns are fitted and abutted against each other through the spring ejectors, and the diaphragm is arranged between the two electrode inner frames through a gasket, and a liquid inlet channel and an air outlet channel which are connected with the single-sided small test space are arranged on the electrode inner frames.

[0009] Furthermore, a first step groove and a second step groove are sequentially formed on the surface of the electrode inner frame on the side away from the single-sided small test space, the electrode plate is arranged in the first step groove, and a sealing rubber plate is arranged in the second step groove.

[0010] Furthermore, an outer frame is provided on the surface of the electrode inner frame, a pressure plate is also provided on the surface of the sealing rubber plate, sealing bolts are provided on the outer frame, the sealing bolts are used to press the pressure plate, the outer frame and the electrode inner frame are locked and connected by a first bolt, and wiring ports are provided on the outer frame, the pressure plate and the sealing rubber plate.

[0011] Furthermore, a metal nesting is provided on the outer frame corresponding to the sealing bolt, and the sealing bolt is threadedly connected to the metal nesting.

[0012] Furthermore, the two electrode inner frames and the gasket are clamped and fixed by the cooperation of the second bolt and the nut, and the gasket is made of PTFE.

[0013] Furthermore, the two single-sided small test spaces are respectively an anode side tank body and a cathode side tank body, the electrode support column is arranged in the anode side tank body, and the spring ejector pin is arranged in the cathode side tank body.

[0014] Furthermore, a third step groove is arranged on the inner surface of the anode side tank body, and the diaphragm is arranged in the third step groove.

[0015] Furthermore, quick connectors are provided on both the liquid inlet channel and the air outlet channel.

[0016] Furthermore, the electrode support column and the spring ejector pin are both made of nickel, precious metal or nickel-plated.

[0017] Beneficial effects of the utility model:

[0018] 1. A columnar structure and a columnar elastic structure are used as the supporting components of the electrode. The columnar structure occupies a smaller chamber space and can be evenly dispersed. The evenly distributed and dispersed structure has little hindering effect on gas overflow.

[0019] 2. Compared with the existing structure, the surface contact between the pole net and the support is transformed into point contact, which reduces the "electrolysis dead zone" and improves the electrolysis efficiency.

[0020] 3. Under the premise of a certain number of electrolytic chambers, the current determines the amount of gas produced. Power P = voltage * current. Therefore, under the condition of a certain current, the smaller the chamber voltage can be used to complete the electrolysis, the lower the energy consumption. The use of spring ejectors makes the overall structure have an elastic support effect, which can provide floating support within a certain support range to ensure that the chamber voltage has no fluctuation or very small fluctuation, so that the "membrane distance" is always maintained between the anode and cathode grids, effectively reducing the chamber voltage and achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the two electrode inner frames of the utility model;

[0023] Figure 3 This is a schematic diagram of the sealing structure of the utility model;

[0024] Figure 4 This utility model Figure 1 Schematic diagram of the internal structure;

[0025] Figure 5 This utility model Figure 4 A partial enlarged schematic diagram of the structure. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1 and Figure 2As shown, an embodiment of the water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support of the utility model comprises two relatively fixed electrode inner frames 1, both electrode inner frames are provided with electrode plates 2, the electrode plates and the electrode inner frames cooperate to form a single-sided small test space 3, the electrode plates in the two single-sided small test spaces are respectively provided with electrode support columns 4 and spring ejectors 5, the electrode support columns and the spring ejectors are arranged opposite to each other, a cathode mesh 22, a diaphragm 21 and an anode mesh 23 are arranged between the electrode support columns and the spring ejectors, the cathode mesh, the diaphragm and the anode mesh of the electrode support columns are fitted and abutted against each other through the spring ejectors, the diaphragm is arranged between the two electrode inner frames through a gasket 20 to form a sealing effect, and a liquid inlet channel 7 and a gas outlet channel 8 which are connected to the electrolytic cell are provided on the electrode inner frames.

[0028] The combined structure of the two electrode inner frames, two single-sided small test spaces, two electrode plates, electrode support columns on the electrode plates, spring ejectors on the electrode plates, cathode mesh, anode mesh, diaphragm and PTFE gaskets is an electrolytic cell.

[0029] The inner frame of the electrode is made of PSU material, which is transparent or translucent, so that the internal reflection situation can be observed and the electrolysis process can be observed more intuitively. On the two electrode plates, the electrode on one electrode plate adopts an electrode support column of fixed size, and the electrode on the other electrode plate adopts a spring ejector to form a cathode side component and an anode side component. After the cathode side component and the anode side component are respectively installed in the two electrode inner frames, two relatively single-sided small test spaces are formed at the same time. The single-sided small test space has a liquid inlet channel and a gas outlet channel that are connected to the outside. The gas outlet channel is located at the top, and the generated gas is discharged upward. The liquid inlet channel is located at the side, and the liquid entering does not affect the gas discharge. The setting of the diaphragm prevents the hydrogen generated by the cathode from mixing with the oxygen generated by the anode; wherein, the above-mentioned spring ejector has a certain expansion margin while having a top pressure effect, so that through the elastic support of the spring ejector, it can be adaptively matched with the electrode support column to keep the cathode net, the diaphragm and the anode net always close, and the floating tightening force of the spring ejector is not very large, ensuring that the diaphragm will not be broken. That is, the "membrane pole distance" is always maintained between the positive and negative pole nets of the diaphragm assembly, which can effectively reduce the cell voltage and save energy. The electrode support column and the spring ejector pin are both columnar structures, which are vertically fixed on the corresponding electrode plate. The structure is simple and uncomplicated, occupying a smaller cell space, and the columnar uniformly distributed structure is conducive to the overflow of gas. Among them, the two electrode inner frames are clamped and fixed by the second bolt 19 and the nut, which is convenient for assembly.

[0030] Reference Figure 3As shown, since the single-sided small test space needs to be sealed, in order to ensure the sealing between the electrode plate and the electrode inner frame, a first step groove 9 and a second step groove 10 are sequentially opened on the surface of the electrode inner frame located on the side away from the single-sided small test space, the electrode plate is arranged in the first step groove, and a sealing rubber plate 11 is arranged in the second step groove. While facilitating installation, the sealing rubber plate can perform good sealing on the connection between the electrode plate and the electrode inner frame.

[0031] Reference Figures 3 to 5 As shown, in order to ensure the sealing effect of the sealing rubber pad, an outer frame 12 is provided on the surface of the electrode inner frame, a pressure plate 13 is also provided on the surface of the sealing rubber plate, and a sealing bolt 14 is provided on the outer frame. The sealing bolt is connected to the outer frame by a thread and can be extended during rotation, thereby squeezing the pressure plate to move toward the sealing rubber pad, so that the sealing rubber pad is tightly pressed on the surface of the first step groove and the surface of the electrode plate, that is, the connecting gap between the electrode plate and the electrode inner frame is sealed, and the outer frame and the electrode inner frame are locked and connected by a first bolt 16, and a wiring port 17 is provided on the outer frame, the pressure plate and the sealing rubber plate, and the electrode plate can be powered through the wiring port.

[0032] After the outer frame is provided, the above-mentioned two electrode inner frames, two outer frames, two single-side small test spaces, two electrode plates, electrode support columns on the electrode plates, spring ejectors on the electrode plates, cathode nets, anode nets, diaphragms and PTFE gaskets are an electrolytic cell. After the outer frame is provided, the outer frame cooperates with the corresponding electrode inner frame to form an electrode frame, and the electrode frames on both sides are clamped and fixed by the second bolts 19 and nuts.

[0033] The outer frame is preferably made of PSU material. Since the strength of PSU material is weaker than that of metal material, the sealing bolt will cause pressure on the thread of the outer frame during use and is easy to be damaged. Therefore, a metal nesting 18 is provided on the outer frame corresponding to the sealing bolt. The metal nesting is fitted with the outer frame, and the sealing bolt is in the threaded hole of the metal nesting. The sealing bolt and the metal nesting are threadedly connected to ensure strength.

[0034] The two single-sided test spaces are respectively the anode side tank body and the cathode side tank body, the electrode support column is arranged in the anode side tank body, and the spring ejector pin is arranged in the cathode side tank body. In actual production, the air pressure in the anode and cathode chambers may fluctuate, which will affect the diaphragm, and the anode mesh in the diaphragm assembly actually used has a higher hardness than the cathode mesh. In order to ensure that the diaphragm is tightly attached to the anode mesh after being compressed, so that it is less affected by air pressure fluctuations, the spring ejector pin is arranged in the cathode side tank body, which has a better effect.

[0035] Specifically, a third step groove is provided on the inner surface of the anode side tank body, the diaphragm is arranged in the third step groove 24, the gasket is arranged between the two electrode inner frames and an avoidance opening 25 is provided on the surface, the cathode mesh is arranged in the cathode side tank body and abuts against the diaphragm through the gasket avoidance opening, thereby ensuring that the electrode inner frame can effectively clamp the gasket and ensure the sealing of the two single-sided small test spaces.

[0036] In order to facilitate liquid connection and gas discharge, quick connectors are provided on the liquid inlet channel and the gas outlet channel, and the hose can be directly plugged in, which is also convenient for disassembly and assembly. The electrode support column and the spring ejector pin are made of nickel, precious metal or nickel plating to meet the requirements of electrolysis. Of course, they can also be made of precious metals.

[0037] Based on the above structure, the assembly description is as follows: There are stepped grooves in the electrode inner frame, namely the first step groove and the second step groove. First, place the electrode plate in the first step groove in the electrode inner frame with the columnar support facing inward, then place the rubber sealing plate in the second step groove, and then place the pressure plate. There are square stepped holes on the outer frame. Install the square metal nest into the square stepped hole, and then use the first bolt to match the threaded hole on the electrode inner frame to lock the outer frame and the electrode inner frame together. Then, use the sealing bolt to screw in and squeeze the pressure plate through the nesting, so that the sealing rubber pad plays a good sealing role. Assemble the two electrode inner frames separately in the above manner;

[0038] Then, eight second bolts are passed through the corresponding through holes from the outside of the electrode inner frame on the anode side. The electrode support column on the anode side is placed on the table with the anode mesh, diaphragm, PTFE gasket for sealing, cathode mesh, and then the electrode inner frame on the cathode side is placed, with the spring ejector on the cathode side facing the table. Finally, the electrode inner frames on both sides are clamped by locking the nuts with the second bolts. After that, the gas and liquid inlet and outlet pipes can be installed through the quick plug-in connector, and the power is turned on for operation.

[0039] A through hole needs to be opened on the gasket, and the gasket is mounted on the second bolt through the through hole to ensure the installation position accuracy of the gasket, which is convenient for the installation of the middle avoidance position. The position accuracy of each component during installation is high and the difficulty of assembly can be reduced.

[0040] Based on the above-mentioned floating support structure, this model can also explore the influence of the tightening force on the chamber voltage under the premise of the membrane electrode distance. Specifically, depending on the thickness of the gasket used, the tightening force of the spring pin on the cathode grid is also different. The thinner the gasket, the smaller the distance between the end of the spring pin and the end of the electrode support column, and the greater the tightening force. The thicker the gasket, the larger the distance and the smaller the tightening force. The exploration is based on this.

[0041] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support, characterized in that: It comprises two relatively fixed electrode inner frames, both of which are provided with electrode plates, the electrode plates and the electrode inner frames cooperate to form a single-sided small test space, the electrode plates in the two single-sided small test spaces are respectively provided with electrode support columns and spring ejectors, the electrode support columns and the spring ejectors are arranged opposite to each other, a cathode net, a diaphragm and an anode net are arranged between the electrode support columns and the spring ejectors, the electrode support columns, the cathode net, the diaphragm and the anode net are fitted and abutted against each other through the spring ejectors, the diaphragm and the gasket are arranged between the two electrode inner frames, and a liquid inlet channel and an air outlet channel which are communicated with the single-sided small test space are arranged on the electrode inner frame.

2. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 1, characterized in that: The surface of the electrode inner frame located away from the single-side small test space is provided with a first step groove and a second step groove in sequence, the electrode plate is arranged in the first step groove, and a sealing rubber plate is arranged in the second step groove.

3. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 2, characterized in that: An outer frame is arranged on the outer surface of the electrode inner frame, a pressure plate is also arranged on the surface of the sealing rubber plate, a sealing bolt is arranged on the outer frame, the sealing bolt is used to press the pressure plate, the outer frame and the electrode inner frame are locked and connected by a first bolt, and wiring ports are arranged on the outer frame, the pressure plate and the sealing rubber plate.

4. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 3, characterized in that: A metal nesting is arranged on the outer frame corresponding to the sealing bolt, and the sealing bolt is threadedly connected with the metal nesting.

5. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 1, characterized in that: The two electrode inner frames and the gasket are clamped and fixed by the cooperation of the second bolt and the nut, and the gasket is made of PTFE.

6. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 1, characterized in that: The two single-sided small test spaces are respectively an anode side tank body and a cathode side tank body, the electrode support column is arranged in the anode side tank body, and the spring ejector pin is arranged in the cathode side tank body.

7. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 6, characterized in that: A third step groove is arranged on the inner surface of the anode side tank body, and the diaphragm is arranged in the third step groove.

8. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 1, characterized in that: The liquid inlet channel and the air outlet channel are both provided with quick connectors.

9. The water electrolysis hydrogen production electrolyzer model using a columnar elastic electrode support as claimed in claim 1, characterized in that: The electrode support column and the spring ejector pin are both made of nickel material, precious metal or nickel-plated.

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