A square modular electrolytic cell with corrosion resistance, salt tolerance and pollution reduction

Abstract

The application discloses a modular square electrolytic cell capable of preventing corrosion, salt resistance and dirt reduction, which is combined in a stacking mode to form an electrolysis stack, and the electrolysis stack comprises an electrolysis stack support, a manual pressing device, a cathode liquid outlet pipe, an anode liquid outlet pipe, an electrolyte inlet pipe, a negative electrode wiring row, a positive electrode wiring row, an anode liquid inlet lining pipe, a cathode liquid inlet lining pipe, a cathode gas outlet lining pipe, an anode gas outlet lining pipe, a positive electrode insulation plate, a negative electrode insulation pressing plate, an electrolytic cell module one, an elastic supporting net and an electrolytic cell module two; electrolyte enters the electrolytic cell modules from the anode liquid inlet lining pipe and the cathode liquid inlet lining pipe through the electrolyte inlet pipe at the bottom, and after electrolysis, hydrogen and an electrolyte mixture flow out from the cathode gas outlet lining pipe, and oxygen and an electrolyte mixture flow out from the anode gas outlet lining pipe, so that liquid paths among the electrolytic modules are connected in parallel.

Description

Technical Field

[0001] This invention relates to the fields of hydrogen production equipment and water electrolysis treatment, specifically, a modular square electrolytic cell that is corrosion-resistant, salt-resistant, and pollution-reducing. Background Technology

[0002] The application of green hydrogen in China's industrial sector for carbon reduction aligns with energy development trends and national industrial policies, demonstrating feasibility and promising prospects. Currently, large-scale water electrolysis for hydrogen production uses pure water, and the demand for freshwater in such processes will reach tens of billions of tons. However, given that the Earth's freshwater reserves are only 2%, this severely restricts the development of the energy industry.

[0003] With the acceleration of industrialization, wastewater discharge across the country has been increasing year by year. The traditional approach is to desalinate wastewater and use large-scale electrolyzers to produce hydrogen, but the process is complicated and the production and maintenance costs are high.

[0004] Therefore, there is a need to provide a modular square electrolytic cell that is corrosion-resistant, salt-resistant, and capable of reducing pollution to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a modular square electrolytic cell that is corrosion-resistant, salt-resistant, and pollution-reducing, capable of directly electrolyzing soda ash water / seawater / domestic sewage / oil and gas field produced water to produce high-purity hydrogen, while simultaneously degrading COD and ammonia nitrogen in the electrolyte; the modular design is adopted from the electrolytic cell module to the electrolytic stack system, making the entire electrolysis system simple to install and maintain, compared to the operation and maintenance costs and time of traditional electrolysis systems.

[0006] The present invention achieves the above objectives through the following technical solutions: A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction capabilities is assembled into an electrolytic stack by stacking. The electrolytic stack includes an electrolytic stack support, a manual clamping device, a cathode outlet pipe, an anode outlet pipe, an electrolyte inlet pipe, a negative electrode terminal block, a positive electrode terminal block, an anode inlet liner pipe, a cathode inlet liner pipe, a cathode outlet liner pipe, an anode outlet liner pipe, a positive electrode insulating plate, a negative electrode insulating pressure plate, electrolytic cell module one, an elastic support net, and electrolytic cell module two. The electrolyte enters the electrolytic cell module through the electrolyte inlet pipe at the bottom, and then through the anode inlet liner pipe and the cathode inlet liner pipe. After electrolysis, the mixture of hydrogen and electrolyte flows out from the cathode outlet liner pipe and then through the cathode outlet pipe, while the mixture of oxygen and electrolyte flows out from the anode outlet liner pipe and then through the anode outlet pipe, thus realizing parallel connection of liquid circuits between the electrolytic modules.

[0007] Furthermore, it also includes insulating nuts, fastening bolts, anode plate assembly, anode gasket, anode frame, intermediate gasket, cathode frame, cathode gasket, cathode plate assembly, insulating nuts, and diaphragm.

[0008] Furthermore, it also includes an outer frame, a limiting plate, an air collection pipe, a liquid spray pipe, a spray nozzle, an air collection hole, bolt holes, an outer sealing gasket, and an inner sealing gasket.

[0009] Furthermore, it also includes titanium plates, spoilers, reinforcing ribs, and electrode mesh.

[0010] Furthermore, it also includes insulating pad one, nut cap, insulating cap, open nut, insulating pad two, and stainless steel bolt.

[0011] Furthermore, plastic plates are screwed onto the upper and lower sides of the inner frame of the fuel cell stack support. First, the positive electrode insulating plate is placed in the frame, and then the positive and negative electrodes of the four electrolytic cell modules are connected end to end. An elastic support mesh is added between every two electrolytic cells. Finally, five manual clamping devices apply pressure evenly through the negative electrode insulating plate to ensure good conductivity between the electrolytic cells and prevent deformation of the inner cavity of the electrolytic cells, while also enabling the electrolytic cell modules to be connected in series.

[0012] Furthermore, the total power of the electrolytic stack can be changed by increasing the number of electrolytic cell modules or increasing the electrode grid area.

[0013] Electrolytic cell modules can be quickly assembled into electrolytic stack systems of different power. When the electrolyte enters the electrolytic cell module from the bottom electrolyte inlet pipe through the anode inlet liner pipe and the cathode inlet liner pipe respectively, after electrolysis, the hydrogen and electrolyte mixture flows from the cathode outlet liner pipe to the cathode outlet pipe, and the oxygen and electrolyte mixture flows from the anode outlet liner pipe to the anode outlet pipe. This achieves parallel connection of liquid circuits between electrolytic cell modules. The positive and negative terminals of each electrolytic cell module are connected, and an elastic support net is added in the middle to ensure uniform pressure transmission of the manual clamping device and prevent deformation of the cavity. It also improves the conductivity between electrolytic cell modules, achieving series circuit connection between electrolytic cell modules.

[0014] Furthermore, the electrolyte contact parts are made of industrial pure titanium, PTFE plastic, and fluororubber, giving the electrolysis system high corrosion resistance. The electrolytes include high-salt, highly corrosive media such as soda ash water, seawater, domestic sewage, and produced water from oil and gas fields.

[0015] Furthermore, the anode mesh uses a porous titanium substrate with a ruthenium-iridium coating, and the cathode mesh uses a porous titanium mesh, enabling the electrolyzer to degrade COD and ammonia nitrogen.

[0016] Compared with existing technologies, this invention can directly electrolyze soda water / seawater / domestic sewage / oil and gas field produced water to produce high-purity hydrogen, while also degrading COD and ammonia nitrogen in the electrolyte; the modular design is adopted from the electrolyzer module to the electrolyzer stack system, making the entire electrolysis system simple to install and maintain, compared with the operation and maintenance costs and time of traditional electrolysis systems. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a modular electrolytic cell stack. Figure 2 A schematic diagram of an electrolytic cell explosion; Figure 3 This is the front view of the electrolytic cell; Figure 4 This is a left view of the electrolytic cell; Figure 5 This is a right view of the electrolytic cell; Figure 6 for Figure 3 A cross-sectional view of kk; Figure 7 This is a schematic diagram of the polar frame structure; Figure 8 This is one of the structural schematic diagrams of the electrode assembly; Figure 9 This is the second schematic diagram of the electrode assembly; Figure 10 This is a cross-sectional view of an electrolytic cell. Detailed Implementation

[0018] Example:

[0019] See Figure 1-10 This embodiment demonstrates a modular square electrolytic cell that is corrosion-resistant, salt-resistant, and pollution-reducing. The electrolytic cell is assembled in a stacking manner to form an electrolytic stack. The electrolytic stack includes an electrolytic stack support 101, a manual clamping device 102, a cathode liquid outlet pipe 103, an anode liquid outlet pipe 104, an electrolyte inlet pipe 105, a negative electrode terminal block 106, a positive electrode terminal block 107, an anode liquid inlet liner pipe 108, a cathode liquid inlet liner pipe 109, a cathode gas outlet liner pipe 110, an anode gas outlet liner pipe 111, a positive electrode insulating plate 112, a negative electrode insulating pressure plate 113, an electrolytic cell module one 114, an elastic support net 115, and an electrolytic cell module two 116. The electrolyte enters the electrolytic cell module from the bottom electrolyte inlet pipe through the anode inlet liner pipe 108 and the cathode inlet liner pipe 109. After electrolysis, the mixture of hydrogen and electrolyte flows out from the cathode outlet liner pipe 110 to the cathode outlet pipe 103, and the mixture of oxygen and electrolyte flows out from the anode outlet liner pipe 111 to the anode outlet pipe 104, realizing the parallel connection of liquid circuits between the electrolytic modules.

[0020] It also includes insulating nut 1 201, fastening bolt 202, anode plate assembly 203, anode sealing gasket 204, anode frame 205, intermediate sealing gasket 206, cathode frame 207, cathode sealing gasket 208, cathode plate assembly 209, insulating nut 210, and diaphragm 211.

[0021] It also includes anode water inlet stud 301, cathode water inlet stud 302, anode air outlet stud 303, cathode air outlet stud 304, cathode water inlet 305, anode air outlet 306, anode water inlet 307, and cathode air outlet 308. It also includes an outer frame 401, a limiting piece 402, an air collecting pipe 403, a liquid spraying pipe 404, a spraying hole 405, an air collecting hole 406, a bolt hole 407, an outer sealing gasket 408, and an inner sealing gasket 409.

[0022] It also includes titanium plate 501, spoiler 502, reinforcing rib 503, and electrode mesh 504.

[0023] It also includes insulating pad 1 601, nut cap 602, insulating cap 603, open nut 604, insulating pad 2 605, stainless steel bolt 606, upper shunt zone of anode 607, anode spray zone 608, cathode spray zone 609, and upper shunt zone of cathode 610.

[0024] Plastic plates are screwed onto the upper and lower sides of the inner frame of the fuel cell stack support. First, the positive electrode insulating plate is placed in the frame. Then, the positive and negative electrodes of the four electrolytic cell modules are connected end to end. An elastic support net is added between every two electrolytic cells. Finally, five manual clamping devices apply pressure evenly through the negative electrode insulating plate to ensure good conductivity between the electrolytic cells and prevent deformation of the inner cavity of the electrolytic cells. At the same time, the electrolytic cell modules are connected in series.

[0025] The total power of the electrolytic stack can be changed by increasing the number of electrolytic cell modules or increasing the area of ​​the electrode grid.

[0026] The parts in contact with the electrolyte are made of industrial pure titanium, PTFE plastic and fluororubber, which gives the electrolysis system high corrosion resistance. The electrolyte includes high-salt and highly corrosive media such as soda water, seawater, domestic sewage and oil and gas field produced water.

[0027] The anode mesh is made of a porous titanium substrate with a ruthenium-iridium coating, and the cathode mesh is made of a porous titanium mesh, which enables the electrolyzer to degrade COD and ammonia nitrogen.

[0028] Electrolytic cell modules can be quickly assembled into electrolytic stack systems of different power. When the electrolyte enters the electrolytic cell module from the bottom electrolyte inlet pipe through the anode inlet liner pipe and the cathode inlet liner pipe respectively, after electrolysis, the hydrogen and electrolyte mixture flows from the cathode outlet liner pipe to the cathode outlet pipe, and the oxygen and electrolyte mixture flows from the anode outlet liner pipe to the anode outlet pipe. This achieves parallel connection of liquid circuits between electrolytic cell modules. The positive and negative terminals of each electrolytic cell module are connected, and an elastic support net is added in the middle to ensure uniform pressure transmission of the manual clamping device and prevent deformation of the cavity. It also improves the conductivity between electrolytic cell modules, achieving series circuit connection between electrolytic cell modules.

[0029] Compared with existing technologies, this invention can directly electrolyze soda water / seawater / domestic sewage / oil and gas field produced water to produce high-purity hydrogen, while also degrading COD and ammonia nitrogen in the electrolyte; the modular design is adopted from the electrolyzer module to the electrolyzer stack system, making the entire electrolysis system simple to install and maintain, compared with the operation and maintenance costs and time of traditional electrolysis systems.

[0030] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction capabilities, characterized in that: An electrolytic cell is formed by stacking components, including a stack support, a manual clamping device, a cathode outlet pipe, an anode outlet pipe, an electrolyte inlet pipe, a negative terminal block, a positive terminal block, an anode inlet liner pipe, a cathode inlet liner pipe, a cathode outlet liner pipe, an anode outlet liner pipe, a positive electrode insulating plate, a negative electrode insulating pressure plate, electrolytic cell module one, an elastic support net, and an electrolytic cell module two. The electrolyte enters the electrolytic cell module through the electrolyte inlet pipe at the bottom, and then through the anode inlet liner pipe and the cathode inlet liner pipe. After electrolysis, the mixture of hydrogen and electrolyte flows out from the cathode outlet liner pipe and then through the cathode outlet pipe, while the mixture of oxygen and electrolyte flows out from the anode outlet liner pipe and then through the anode outlet pipe, thus realizing parallel connection of liquid circuits between the electrolytic modules.

2. The modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 1, characterized in that: It also includes insulating nuts, fastening bolts, anode plate assembly, anode gasket, anode frame, intermediate gasket, cathode frame, cathode gasket, cathode plate assembly, insulating nuts, and diaphragm.

3. The modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 2, characterized in that: It also includes an outer frame, a limiting plate, an air collection pipe, a liquid spray pipe, a spray nozzle, an air collection hole, bolt holes, an outer sealing gasket, and an inner sealing gasket.

4. The modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 3, characterized in that: It also includes titanium plates, spoilers, reinforcing ribs, and electrode mesh.

5. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 4, characterized in that: It also includes insulating pad 1, nut cap, insulating cap, open nut, insulating pad 2, and stainless steel bolt.

6. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to any one of claims 1-5, characterized in that: Plastic plates are screwed onto the upper and lower sides of the inner frame of the fuel cell stack support. First, the positive electrode insulating plate is placed in the frame. Then, the positive and negative electrodes of the four electrolytic cell modules are connected end to end. An elastic support net is added between every two electrolytic cells. Finally, five manual clamping devices apply pressure evenly through the negative electrode insulating plate to ensure good conductivity between the electrolytic cells and prevent deformation of the inner cavity of the electrolytic cells. At the same time, the electrolytic cell modules are connected in series.

7. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 6, characterized in that: The total power of the electrolytic stack can be changed by increasing the number of electrolytic cell modules or increasing the area of ​​the electrode grid.

8. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 7, characterized in that: Electrolytic cell modules can be quickly assembled into electrolytic stack systems of different power. When the electrolyte enters the electrolytic cell module from the bottom electrolyte inlet pipe through the anode inlet liner pipe and the cathode inlet liner pipe respectively, after electrolysis, the hydrogen and electrolyte mixture flows from the cathode outlet liner pipe to the cathode outlet pipe, and the oxygen and electrolyte mixture flows from the anode outlet liner pipe to the anode outlet pipe. This achieves parallel connection of liquid circuits between electrolytic cell modules. The positive and negative terminals of each electrolytic cell module are connected, and an elastic support net is added in the middle to ensure uniform pressure transmission of the manual clamping device and prevent deformation of the cavity. It also improves the conductivity between electrolytic cell modules, achieving series circuit connection between electrolytic cell modules.

9. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 8, characterized in that: The parts in contact with the electrolyte are made of industrial pure titanium, PTFE plastic and fluororubber, which gives the electrolysis system high corrosion resistance. The electrolyte includes high-salt and highly corrosive media such as soda water, seawater, domestic sewage and oil and gas field produced water.

10. A modular square electrolytic cell with corrosion resistance, salt tolerance, and pollution reduction according to claim 9, characterized in that: The anode mesh is made of a porous titanium substrate with a ruthenium-iridium coating, and the cathode mesh is made of a porous titanium mesh, which enables the electrolyzer to degrade COD and ammonia nitrogen.

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