Alkaline electrolytic bath pole frame, pole plate and alkaline electrolytic bath

Abstract

The invention provides an alkaline electrolytic bath pole frame, a pole plate and an alkaline electrolytic bath, and belongs to the technical field of electrolytic hydrogen production, the alkaline electrolytic bath pole frame comprises a pole frame main body, the surface of the pole frame main body is provided with a gas-liquid tank and an alkaline liquid tank, and non-metal runner blocks are embedded in the gas-liquid tank and the alkaline liquid tank; a gas-liquid flowing channel is arranged between the back surface of the non-metal runner block in the gas-liquid tank and the tank bottom of the gas-liquid tank, and the front surface of the non-metal runner block in the gas-liquid tank is a plane flush with the top of the gas-liquid tank; an alkali liquor flowing channel is arranged between the back surface of the non-metal runner block in the alkali liquor tank and the tank bottom of the alkali liquor tank, and the front surface of the non-metal runner block in the alkali liquor tank is a plane flush with the top of the alkali liquor tank. The alkaline electrolytic bath has the beneficial effect that the service life of the alkaline electrolytic bath can be effectively prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrolytic hydrogen production, and particularly relates to an alkaline electrolyzer electrode frame, electrode plate and alkaline electrolyzer. Background Art

[0002] As a secondary energy source with wide sources, green, low-carbon characteristics, hydrogen energy has great potential in addressing climate change, promoting energy transformation and industrial upgrading, and is an important part of the future energy system. Moreover, among numerous hydrogen production technologies, alkaline water electrolysis for hydrogen production (ALK) has become one of the main technical routes for large-scale production of green hydrogen due to advantages such as mature technology, stable operation, and strong coupling with renewable energy.

[0003] Currently, existing alkaline electrolyzers are mainly assembled from components such as end pressure plates, gaskets, electrode plates, electrodes, diaphragms, etc., and hundreds of electrolysis chambers are formed through these components. These electrolysis chambers are pressed together by screws and end plates to form a cylindrical or square overall structure. And each electrolysis chamber is bounded by 2 adjacent electrode plates and includes 6 parts: positive and negative bipolar plates, anode electrode, diaphragm, sealing washer, and cathode electrode. Among them, the electrode plate, as the core component supporting the electrode and diaphragm, is welded by an electrode frame made of metal material and a main electrode plate made of metal material, and structures such as hydrogen-side gas-liquid holes, oxygen-side gas-liquid holes, alkali solution holes, alkali solution tanks, gas-liquid tanks, etc. are provided on the electrode frame. Among them, the hydrogen-side gas-liquid hole is the gathering port for the mixture of alkali solution and hydrogen, the oxygen-side gas-liquid hole is the gathering port for the mixture of alkali solution and oxygen, and the mixed products on the hydrogen side and oxygen side respectively enter the gas-liquid separation device after being collected through the corresponding pipelines. The alkali solution hole bears the flow channel cavity for the alkali solution to flow into the reaction space of the electrode plate, the alkali solution tank bears the channel for the alkali solution to enter the reaction space, and the gas-liquid tank bears the channel structure for the gas-liquid mixture to enter the gas-liquid hole. And channel structures such as alkali solution tanks and gas-liquid tanks usually need to rely on the lapping of stainless steel sheets or nickel sheets to form a support plane and a flow channel space, so as to provide support for the diaphragm through the outer side of the stainless steel sheet or nickel sheet to achieve sealing and prevent the leakage of hydrogen and oxygen; the groove-shaped structure inside the stainless steel sheet or nickel sheet serves as the medium flow channel.

[0004] However, during the long-term operation process, potassium ions and sodium hydroxide molecules in the alkali are very likely to react with chromium elements on the surface of stainless steel at high temperatures to form alkaline chromates, thereby significantly weakening the chromium elements on the surface of stainless steel and destroying the corrosion resistance of stainless steel. At the same time, oxygen and water molecules present in the liquid alkali are also likely to react with chromium elements on the surface of stainless steel to form oxygen-containing compounds, and this process will also cause the concentration of chromium elements on the surface of the steel to decrease, thus losing the surface corrosion resistance. Moreover, sodium ions and water molecules in the liquid alkali can penetrate into the inner layer of the stainless steel surface, resulting in embrittlement and cracks inside the stainless steel. At this time, hydrogen and oxygen leakage points will be formed at this position, causing the gas purity at the gas-liquid separation equipment end to decrease, and in severe cases, even affecting the safe operation of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to propose and design an alkaline electrolyzer electrode frame, electrode plate and alkaline electrolyzer for the corrosion problems existing in the internal metal flow channels and stainless steel sheets of the existing alkaline electrolyzers, so as to overcome the above problems and effectively extend the service life of the alkaline electrolyzer.

[0006] To achieve the above purpose, on the one hand, the present invention provides an alkaline electrolyzer electrode frame, which includes an electrode frame body. Gas-liquid grooves and alkali liquid grooves are formed on the surface of the electrode frame body. Non-metal flow channel blocks are embedded in both the inside of the gas-liquid groove and the inside of the alkali liquid groove. A gas-liquid circulation channel is provided between the back surface of the non-metal flow channel block in the gas-liquid groove and the bottom of the gas-liquid groove, and the front surface of the non-metal flow channel block in the gas-liquid groove is a plane flush with the top of the gas-liquid groove. An alkali liquid circulation channel is provided between the back surface of the non-metal flow channel block in the alkali liquid groove and the bottom of the alkali liquid groove, and the front surface of the non-metal flow channel block in the alkali liquid groove is a plane flush with the top of the alkali liquid groove. In this way, since the present invention uses non-metal flow channel blocks instead of stainless steel sheets or nickel sheets at the electrode frame of the alkaline electrolyzer, it can effectively solve the corrosion problems of the internal metal flow channels and stainless steel sheets of the electrode frame in a complex environment, thereby effectively extending the service life of the alkaline electrolyzer. At the same time, compared with the metal structure, due to the certain elasticity of the non-metal structure, it can also play a certain protective role for the diaphragm to prevent the diaphragm from being crushed.

[0007] Further, the back surface of the non-metal flow channel block in the gas-liquid groove abuts against the bottom of the gas-liquid groove; the back surface of the non-metal flow channel block in the alkali liquid groove abuts against the bottom of the alkali liquid groove. At least two grooves are spaced on the back surface of the non-metal flow channel block, and each groove forms a gas-liquid circulation channel or an alkali liquid circulation channel, and the corresponding circulation channel can be divided into a plurality of non-connected flow channel cavities by setting a plurality of grooves.

[0008] Further, the non-metal flow channel block is made of polyether ether ketone and has excellent properties such as alkali resistance, oxidation resistance and high temperature resistance.

[0009] Furthermore, the non-metallic flow channel block is made of polysulfone and has excellent properties such as alkali resistance, oxidation resistance, and high temperature resistance.

[0010] Furthermore, the non-metallic flow channel block is integrally formed by a thermoplastic process. At this time, it can be formed by heating and melting alkali-resistant non-metallic materials (such as polyether ether ketone PEEK, polysulfone PSF / PSU) and molded into a non-metallic flow channel block with a specific structure in a mold at one time, that is, a non-metallic flow channel block with a flat support surface on the front and a preset flow channel cavity on the back is formed, without subsequent machining, thus effectively improving the production efficiency of the bipolar plate and the electrode plate.

[0011] Furthermore, the non-metallic flow channel block is adhered to the bipolar plate body by an adhesive process to prevent the non-metallic flow channel block from falling off during the assembly of the electrolytic cell.

[0012] Furthermore, gas-liquid holes are provided on the surface of the bipolar plate body. The gas-liquid holes are communicated with the gas-liquid tank and serve as the collection port for the gas-liquid mixture on the hydrogen side or the oxygen side. When hydrogen (cathode side) or oxygen (anode side) is generated during the electrolysis reaction, the mixture of the alkali solution and the gas is collected and then transported to the gas-liquid separation device to achieve gas-liquid separation.

[0013] Furthermore, alkali solution holes are provided on the surface of the bipolar plate body. The alkali solution holes are communicated with the alkali solution tank and serve as the core flow channel cavity for the alkali solution to flow into the reaction space of the electrode plate, providing the necessary alkaline electrolyte (such as potassium hydroxide solution) for the electrolysis reaction, ensuring that the alkali solution uniformly flows into the reaction area of each electrolytic cell, and maintaining the continuous progress of the electrolysis reaction.

[0014] On the other hand, the present invention also provides an alkaline electrolytic cell electrode plate, which includes a main electrode plate and the above-mentioned alkaline electrolytic cell bipolar plate. The main electrode plate is installed on the above-mentioned alkaline electrolytic cell bipolar plate and plays key roles such as electrode support, medium circulation, gas-liquid separation, and sealing in the entire alkaline electrolytic cell.

[0015] In addition, the present invention also provides an alkaline electrolytic cell, which includes the above-mentioned alkaline electrolytic cell electrode plate, and based on this electrode plate structure, effectively extends the service life of the entire alkaline electrolytic cell.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: 1. In the alkaline electrolytic cell of the present invention, the non-metallic flow channel block is used to replace the stainless steel sheet or nickel sheet used in the alkali solution tank and the gas-liquid tank, which can effectively solve the corrosion problem of the internal metal flow channel and the stainless steel sheet in a complex environment and effectively extend the service life of the alkaline electrolytic cell; 2. The present invention uses a thermoplastic process to manufacture the non-metallic flow channel block. Compared with the structure of the conventional alkaline electrolytic cell in which the flow channel holes are machined on the bipolar plate by a milling process, it can effectively improve the production efficiency of the electrode plate; 3. For the electrode frame made by milling process in a conventional alkaline electrolyzer, burrs, flash and other defects are likely to be formed during the milling process at the gas-liquid tank and the lye tank, and manual or mechanical grinding means are often required to remove the defects, resulting in serious time consumption during the production and installation processes. In the present invention, each groove structure is directly designed on the non-metallic flow channel block, reducing the process of batch milling of the metal electrode frame, effectively improving the processing efficiency of the electrode frame, and reducing the burrs and flash during the milling process of the metal machine frame. 4. In a conventional alkaline electrolyzer, if there are missing defects during the processing, serious burr protrusions will be formed after the electroplating anti-corrosion process of the electrode frame, affecting the installation of the stainless steel sheet. Moreover, if the protrusions with nickel layer are forcibly removed and the nickel layer is damaged, this place will become a corrosion point. In the present invention, the non-metallic flow channel block can be installed into the corresponding groove by using a shaping tool, so the non-metallic flow channel block has an advantage in installation efficiency. 5. In the present invention, non-metallic flow-through blocks with non-metallic structures are used at the gas-liquid tank and the lye tank. Compared with the metal structure, the non-metallic structure has a certain elasticity and plays a certain role in protecting the diaphragm to prevent it from being crushed. 6. Due to the elasticity of the non-metallic structure, the sealing effect of the present invention is better than that of the existing metal flow channel structure. At the same time, based on the non-conductive property of the non-metal, the present invention can also effectively reduce stray current, making the hydrogen purification and oxygen purity better than those of the conventional alkaline electrolyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the electrode frame body in the present invention; Figure 2 It is a schematic structural diagram of the non-metallic flow channel block in the present invention Figure 1 ; Figure 3 It is a schematic structural diagram of the non-metallic flow channel block in the present invention Figure 2 ; Figure 4 It is a schematic structural diagram of the non-metallic flow channel block at the gas-liquid tank in the present invention; Figure 5 It is a schematic structural diagram of the non-metallic flow channel block at the lye tank in the present invention; Figure 6 It is a schematic structural diagram of the alkaline electrolyzer electrode plate in the present invention.

[0019] In the figure: 1. Gas-liquid tank; 2. Gas-liquid hole; 3. Main body of the bipolar plate frame; 4. Alkali solution hole; 5. Alkali solution tank; 6. Plane; 7. Groove; 8. Non-metallic flow channel block; 9. Gas-liquid flow channel; 10. Main bipolar plate; 11. Alkali solution flow channel. Detailed implementation mode

[0020] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0021] Embodiment 1 As Figures 1 to 5 shown, Embodiment 1 of the present invention provides an alkaline electrolyzer bipolar plate frame, which includes a main body 3 of the bipolar plate frame. Gas-liquid holes 2, alkali solution holes 4, a gas-liquid tank 1, and an alkali solution tank 5 are formed on the surface of the main body 3 of the bipolar plate frame. Moreover, the gas-liquid holes 2 communicate with the gas-liquid tank 1 and serve as the collection ports for the gas-liquid mixture products on the hydrogen side or the oxygen side. When hydrogen (cathode side) or oxygen (anode side) is generated in the electrolysis reaction, the mixture of the alkali solution and the gas is collected and then transported to the gas-liquid separation device to achieve gas-liquid separation. The alkali solution holes 4 communicate with the alkali solution tank 5 and serve as the core flow channel holes for the alkali solution to flow into the reaction space of the bipolar plate, providing the necessary alkaline electrolyte (such as potassium hydroxide solution) for the electrolysis reaction, ensuring that the alkali solution evenly flows into the reaction areas of each electrolysis cell, and maintaining the continuous progress of the electrolysis reaction.

[0022] Non-metallic flow channel blocks 8 are embedded in both the inside of the gas-liquid tank 1 and the inside of the alkali solution tank 5. The non-metallic flow channel blocks 8 are made of non-metallic materials such as polyether ether ketone and polysulfone, which have excellent properties such as alkali resistance, oxidation resistance, and high temperature resistance. Moreover, the non-metallic flow channel blocks 8 are preferably integrally formed by a thermoplastic process. At this time, the alkali-resistant non-metallic material (such as polyether ether ketone PEEK, polysulfone PSF / PSU) can be heated and melted, and then formed into a non-metallic flow channel block 8 with a specific structure in a mold at one time, that is, a non-metallic flow channel block 8 with a flat support surface on the front and a preset flow channel hole cavity on the back is formed, without subsequent mechanical processing, thereby effectively improving the production efficiency of the bipolar plate frame and the bipolar plate.

[0023] And, as Figure 2 , Figure 3 , Figure 4As shown, the front surface of the non-metallic flow channel block 8 adopts a flat surface 6 structure, and the back surface of the non-metallic flow channel block 8 adopts a structure with a plurality of grooves 7 arranged at intervals. Moreover, the back surface of the non-metallic flow channel block 8 located in the gas-liquid tank 1 abuts against the bottom of the gas-liquid tank 1; the back surface of the non-metallic flow channel block 8 located in the lye tank 5 abuts against the bottom of the lye tank 5, and cooperates with the corresponding bottom through the grooves 7 arranged at intervals on the back surface of the non-metallic flow channel block 8 to form a gas-liquid flow channel 9 or a lye flow channel 11, that is, a gas-liquid flow channel 9 is formed between the back surface of the non-metallic flow channel block 8 located in the gas-liquid tank 1 and the bottom of the gas-liquid tank 1 through the grooves 7, and a lye flow channel 11 is formed between the back surface of the non-metallic flow channel block 8 located in the lye tank 5 and the bottom of the lye tank 5 through the grooves 7. At the same time, the front surface of the non-metallic flow channel block 8 located in the gas-liquid tank 1 is flush with the top of the gas-liquid tank 1, and the front surface of the non-metallic flow channel block 8 located in the lye tank 5 is flush with the top of the lye tank 5, so as to provide support for the diaphragm to achieve sealing.

[0024] In this way, since the present invention uses the non-metallic flow channel block 8 to replace the stainless steel sheet or nickel sheet at the electrode frame of the alkaline electrolytic cell, it can effectively solve the corrosion problem of the metal flow channel and stainless steel sheet inside the electrode frame in a complex environment, and thus effectively extend the service life of the alkaline electrolytic cell; at the same time, compared with the metal structure, due to the certain elasticity of the non-metallic structure, it can also play a certain protective role on the diaphragm to prevent the diaphragm from being crushed; and ensure that the sealing effect of the first embodiment is better than that of the existing metal flow channel structure. In addition, based on the non-conductive property of the non-metal, the present invention can also effectively reduce the stray current, making the purity of hydrogen purification and oxygen better than that of the conventional alkaline electrolytic cell; based on the thermoplastic process, compared with the structure of the conventional alkaline electrolytic cell in which the flow channel holes are processed on the electrode frame by the digital milling process, the structure in which the grooves 7 are directly designed at the non-metallic flow channel block 8 in the first embodiment reduces the process of batch milling the grooves on the metal electrode frame, effectively improves the processing efficiency of the electrode frame, reduces the burrs and rough edges during the milling process of the metal machine frame, and thus effectively improves the production efficiency of the electrode plate.

[0025] Embodiment 2 As Figure 6As shown in the figure, the second embodiment provides an alkaline electrolyzer plate, which includes a main plate 10 and an alkaline electrolyzer cell frame. Among them, the alkaline electrolyzer cell frame includes a cell frame body 3, and the main plate 10 is installed on the cell frame body 3 of the alkaline electrolyzer cell frame by means of welding or the like. Moreover, gas-liquid holes 2, alkali solution holes 4, gas-liquid grooves 1 and alkali solution grooves 5 are formed on the surface of the cell frame body 3. The gas-liquid holes 2 are communicated with the gas-liquid grooves 1 and serve as the collection ports for the gas-liquid mixture products on the hydrogen side or the oxygen side. When hydrogen (cathode side) or oxygen (anode side) is generated in the electrolysis reaction, the mixture of the alkali solution and the gas is converged and then transported to the gas-liquid separation device to achieve gas-liquid separation. The alkali solution holes 4 are communicated with the alkali solution grooves 5 and serve as the core flow channel cavities for the alkali solution to flow into the plate reaction space, providing the necessary alkaline electrolyte (such as potassium hydroxide solution) for the electrolysis reaction to ensure that the alkali solution evenly flows into the reaction areas of each electrolysis cell and maintains the continuous progress of the electrolysis reaction.

[0026] Non-metallic flow channel blocks 8 are embedded in the interiors of both the gas-liquid groove 1 and the alkali solution groove 5. The non-metallic flow channel blocks 8 are made of non-metallic materials such as polyether ether ketone and polysulfone with excellent properties such as alkali resistance, oxidation resistance and high temperature resistance. Moreover, the non-metallic flow channel blocks 8 are preferably integrally formed by a thermoplastic process. At this time, it can heat and melt the alkali-resistant non-metallic material (such as polyether ether ketone PEEK, polysulfone PSF / PSU), and be integrally formed into a non-metallic flow channel block 8 with a specific structure in a mold, that is, a non-metallic flow channel block 8 with a flat support surface on the front and a preset flow channel cavity on the back is formed, without subsequent mechanical processing, thereby effectively improving the production efficiency of the cell frame and the plate.

[0027] And, as Figure 2 , Figure 3 , Figure 4 shown, the front of the non-metallic flow channel block 8 adopts a flat surface 6 structure, the back of the non-metallic flow channel block 8 adopts a structure with a plurality of grooves 7 arranged at intervals, and the back of the non-metallic flow channel block 8 located in the gas-liquid groove 1 abuts against the bottom of the gas-liquid groove 1; the back of the non-metallic flow channel block 8 located in the alkali solution groove 5 abuts against the bottom of the alkali solution groove 5, and forms a gas-liquid flow channel 9 or an alkali solution flow channel 11 through the cooperation of each groove 7 arranged at intervals on the back of the non-metallic flow channel block 8 and the corresponding bottom, that is, a gas-liquid flow channel 9 is formed between the back of the non-metallic flow channel block 8 located in the gas-liquid groove 1 and the bottom of the gas-liquid groove 1 through each groove 7, and an alkali solution flow channel 11 is formed between the back of the non-metallic flow channel block 8 located in the alkali solution groove 5 and the bottom of the alkali solution groove 5 through each groove 7. At the same time, the front of the non-metallic flow channel block 8 located in the gas-liquid groove 1 is flush with the top of the gas-liquid groove 1, and the front of the non-metallic flow channel block 8 located in the alkali solution groove 5 is flush with the top of the alkali solution groove 5, so as to provide support for the diaphragm to achieve sealing.

[0028] Moreover, at this time, the alkaline electrolyzer plate with the above-mentioned alkaline electrolyzer electrode frame has the following beneficial effects: First, in the second embodiment of the present invention, the non-metal flow channel block is used to replace the stainless steel sheet or nickel sheet used in the alkali liquid tank and the gas-liquid tank, which can effectively solve the corrosion problem of the internal metal flow channel and stainless steel sheet in a complex environment and effectively extend the service life of the alkaline electrolyzer; Second, the non-metal flow channel block is made by thermoplastic process. Compared with the structure of the conventional alkaline electrolyzer in which the flow channel holes are machined on the electrode frame by milling process, the production efficiency of the electrode plate can be effectively improved. Specifically, in the conventional alkaline electrolyzer, burrs, flash and other defects are easily formed during the milling process at the gas-liquid tank and the alkali liquid tank, and manual or mechanical grinding means are often required to remove the defects, resulting in serious time consumption in the production and installation process; while in the present invention, each groove structure is directly designed on the non-metal flow channel block, reducing the process of batch milling of the metal electrode frame, effectively improving the processing efficiency of the electrode frame, and reducing the burr and flash phenomenon during the milling process of the metal frame; At the same time, in the conventional alkaline electrolyzer, if there are omitted defects during the processing, after the electroplating anti-corrosion process of the electrode frame, serious burr protrusions will be formed, which will affect the installation of the stainless steel sheet. Moreover, if the protrusion with nickel layer is forcibly removed and the nickel layer is damaged, this place will become a corrosion point; while in the present invention, the non-metal flow channel block can be installed into the corresponding groove by using a shaping tool, so the non-metal flow channel block has an advantage in installation efficiency; In addition, in the second embodiment, the non-metal flow-through block with a non-metal structure is used at the gas-liquid tank and the alkali liquid tank. Compared with the metal structure, the non-metal structure has a certain elasticity, which has a certain protective effect on the diaphragm and prevents the diaphragm from being crushed; Moreover, due to the elasticity of the non-metal structure, the sealing effect of the second embodiment is better than that of the existing metal flow channel structure; At the same time, based on the non-conductive characteristic of the non-metal, the second embodiment can also effectively reduce the stray current, making the hydrogen purification and oxygen purity better than those of the conventional alkaline electrolyzer.

[0029] Embodiment Three Embodiment 3 provides an alkaline electrolyzer, which includes the alkaline electrolyzer plate described in Embodiment 2. The alkaline electrolyzer plate includes a main plate 10 and an alkaline electrolyzer cell frame. Among them, the alkaline electrolyzer cell frame includes a cell frame body 3, and the main plate 10 is installed on the cell frame body 3 of the alkaline electrolyzer cell frame by means of welding or the like. Moreover, gas-liquid holes 2, alkali solution holes 4, gas-liquid grooves 1 and alkali solution grooves 5 are provided on the surface of the cell frame body 3. The gas-liquid holes 2 are communicated with the gas-liquid grooves 1 and serve as the collecting ports for the gas-liquid mixture products on the hydrogen side or the oxygen side. When hydrogen (cathode side) or oxygen (anode side) is generated in the electrolysis reaction, the mixture of alkali solution and gas is converged and then transported to the gas-liquid separation device to achieve gas-liquid separation. The alkali solution holes 4 are communicated with the alkali solution grooves 5 and serve as the core flow channel cavities for the alkali solution to flow into the plate reaction space, providing the necessary alkaline electrolyte (such as potassium hydroxide solution) for the electrolysis reaction, ensuring that the alkali solution evenly flows into the reaction areas of each electrolysis chamber, and maintaining the continuous progress of the electrolysis reaction.

[0030] Non-metallic flow channel blocks 8 are embedded in both the inside of the gas-liquid groove 1 and the inside of the alkali solution groove 5. The non-metallic flow channel blocks 8 are made of non-metallic materials with excellent properties such as alkali resistance, oxidation resistance and high temperature resistance, such as polyether ether ketone and polysulfone. Moreover, the non-metallic flow channel blocks 8 are preferably integrally formed by a thermoplastic process. At this time, it can heat and melt alkali-resistant non-metallic materials (such as polyether ether ketone PEEK, polysulfone PSF / PSU), and be integrally formed into a non-metallic flow channel block 8 with a specific structure in a mold, that is, a non-metallic flow channel block 8 with a flat support surface on the front and a preset flow channel cavity on the back is formed, without subsequent mechanical processing, thereby effectively improving the production efficiency of the cell frame and the plate.

[0031] And, as Figure 2 、 Figure 3 、 Figure 4 shown, the front of the non-metallic flow channel block 8 adopts a flat surface 6 structure, the back of the non-metallic flow channel block 8 adopts a structure with a plurality of grooves 7 arranged at intervals, and the back of the non-metallic flow channel block 8 located in the gas-liquid groove 1 abuts against the bottom of the gas-liquid groove 1; the back of the non-metallic flow channel block 8 located in the alkali solution groove 5 abuts against the bottom of the alkali solution groove 5, and forms a gas-liquid flow channel 9 or an alkali solution flow channel 11 through the cooperation of each groove 7 arranged at intervals on the back of the non-metallic flow channel block 8 and the corresponding bottom, that is, a gas-liquid flow channel 9 is formed between the back of the non-metallic flow channel block 8 located in the gas-liquid groove 1 and the bottom of the gas-liquid groove 1 through each groove 7, and an alkali solution flow channel 11 is formed between the back of the non-metallic flow channel block 8 located in the alkali solution groove 5 and the bottom of the alkali solution groove 5 through each groove 7. At the same time, the front of the non-metallic flow channel block 8 located in the gas-liquid groove 1 is flush with the top of the gas-liquid groove 1, and the front of the non-metallic flow channel block 8 located in the alkali solution groove 5 is flush with the top of the alkali solution groove 5, so as to provide support for the diaphragm to achieve sealing.

[0032] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An alkaline electrolyzer bipolar plate, comprising a bipolar plate main body (3), wherein a gas-liquid groove (1) and an alkali solution groove (5) are formed on the surface of the bipolar plate main body (3), and it is characterized in that, A non-metallic flow channel block (8) is embedded in both the interior of the gas-liquid tank (1) and the interior of the lye tank (5). A gas-liquid flow channel (9) is provided between the back surface of the non-metallic flow channel block (8) located in the gas-liquid tank (1) and the bottom of the gas-liquid tank (1). The front surface of the non-metallic flow channel block (8) located in the gas-liquid tank (1) is a plane (6) flush with the top of the gas-liquid tank (1); a lye flow channel (11) is provided between the back surface of the non-metallic flow channel block (8) located in the lye tank (5) and the bottom of the lye tank (5). The front surface of the non-metallic flow channel block (8) located in the lye tank (5) is a plane (6) flush with the top of the lye tank (5).

2. The alkaline electrolyzer electrode frame according to claim 1, characterized in that, The back surface of the non-metallic flow channel block (8) located in the gas-liquid tank (1) abuts against the bottom of the gas-liquid tank (1); the back surface of the non-metallic flow channel block (8) located in the lye tank (5) abuts against the bottom of the lye tank (5). At least two grooves (7) are provided at intervals on the back surface of the non-metallic flow channel block (8).

3. The bipolar plate for an alkaline electrolyzer according to claim 1, wherein The material of the non-metallic flow channel block (8) is polyetheretherketone.

4. The bipolar plate for an alkaline electrolyzer according to claim 1, wherein The material of the non-metallic flow channel block (8) is polysulfone.

5. The bipolar plate of the alkaline electrolyzer according to claim 1, wherein, The non-metallic flow channel block (8) is integrally formed by a thermoplastic process.

6. The bipolar plate for an alkaline electrolyzer according to claim 1, wherein The non-metallic flow channel block (8) is adhered to the bipolar plate frame body (3) by an adhesive process.

7. The bipolar plate of the alkaline electrolyzer according to claim 1, characterized in that, Gas-liquid holes (2) are formed on the surface of the bipolar plate frame body, and the gas-liquid holes (2) communicate with the gas-liquid tank (1).

8. The bipolar plate for an alkaline electrolyzer according to claim 1, wherein Lye holes (4) are formed on the surface of the bipolar plate frame body, and the lye holes (4) communicate with the lye tank (5).

9. An alkaline electrolyzer plate, comprising a main plate (10), characterized in that, It further includes a bipolar plate for an alkaline electrolytic cell according to any one of claims 1-8, and a main electrode plate (10) is installed on the bipolar plate for the alkaline electrolytic cell.

10. An alkaline electrolyzer, characterized in that, It includes a bipolar plate for an alkaline electrolytic cell according to claim 9.

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