Electrolytic tank for producing hydrogen by electrolyzing water

Abstract

The utility model discloses an electrolytic tank for producing hydrogen by electrolyzing water. The electrolytic tank comprises an anode end electrolytic unit tank, a cathode end electrolytic unit tank and a plurality of intermediate electrolytic unit tanks positioned between the anode end electrolytic unit tank and the cathode end electrolytic unit tank, each electrolysis unit tank is formed by folding an anode chamber and a cathode chamber, and an anode side sealing gasket, a diaphragm and a cathode side sealing gasket are sequentially arranged between the folding surfaces of the anode chamber and the cathode chamber; an independent anode chamber liquid inlet and an independent anode chamber liquid outlet are respectively formed in the anode chamber of the electrolysis unit tank, and an independent cathode chamber liquid inlet and an independent cathode chamber liquid outlet are respectively formed in the cathode chamber of the electrolysis unit tank; an anode binding post is arranged on the anode chamber, and a cathode binding post is arranged on the cathode chamber. The device can be installed, disassembled and maintained on site at a use end, and the transportation cost, the maintenance cost and the like caused by installation and maintenance at a production end are reduced; the electrolytic hydrogen production mode can be flexibly switched according to different conditions, so that the advantages of electrolytic alkaline water hydrogen production and PEM hydrogen production are complementary.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production electrolyzers, and in particular to an electrolyzer for producing hydrogen by electrolyzing water. Background Art

[0002] At present, the main technologies for producing hydrogen by electrolysis of water include alkaline water electrolysis and PEM hydrogen production. Both technologies have their own advantages and disadvantages. For example, the cost of the catalyst for hydrogen production by electrolysis of alkaline water is low, the diaphragm used is easy to prepare, and the cost of the electrolyzer is low, while PEM hydrogen production has high electrolysis efficiency and fast start and stop. Therefore, if the two technologies can complement each other, the efficiency of hydrogen production by electrolysis can be improved. Utility Model Content

[0003] The purpose of the utility model is to provide an electrolytic cell for producing hydrogen by electrolyzing water, which has the purpose of low manufacturing cost and convenient installation and maintenance. The specific technical scheme is as follows:

[0004] A water electrolysis hydrogen production electrolytic cell, comprising a plurality of electrolytic cell cells stacked and pressed together in sequence, wherein the plurality of electrolytic cell cells are respectively an anode electrolytic cell cell, a cathode electrolytic cell cell and a plurality of intermediate electrolytic cell cells located between the anode electrolytic cell cell and the cathode electrolytic cell cell; each of the electrolytic cell cells is formed by an anode chamber and a cathode chamber mating together, and an anode side sealing gasket, a diaphragm and a cathode side sealing gasket are sequentially arranged between the mating surfaces of the anode chamber and the cathode chamber; the anode chamber of each of the electrolytic cell cells is respectively provided with an independent anode chamber liquid inlet and an independent anode chamber liquid outlet, and the cathode chamber of each of the electrolytic cell cells is respectively provided with an independent cathode chamber liquid inlet and an independent cathode chamber liquid outlet; the anode chamber is provided with an anode terminal, and the cathode chamber is provided with a cathode terminal.

[0005] In the utility model, the anode electrolysis unit cell, the cathode electrolysis unit cell and the intermediate electrolysis unit cell are all made of nickel material.

[0006] Preferably, the independent anode chamber liquid inlet is located at a lower position on one side of the anode chamber, and the independent anode chamber liquid outlet is located at an upper position on the other side of the anode chamber.

[0007] Preferably, the independent cathode chamber liquid inlet is located at a lower position on one side of the cathode chamber, and the independent cathode chamber liquid outlet is located at an upper position on the other side of the cathode chamber.

[0008] In the utility model, the anode electrolysis unit cell and the cathode unit cell are the same as the intermediate unit cell except for the anode terminal and the cathode terminal.

[0009] In the utility model, an electrode mesh is arranged in the anode chamber near the diaphragm, and a number of support members are also arranged in the anode chamber. The support members divide the anode chamber into a number of anode areas, and each anode area is filled with a three-dimensional elastic net, which is elastically connected between the bottom of the anode chamber and the electrode mesh.

[0010] In the utility model, an electrode mesh is arranged in the cathode chamber near the diaphragm, and a number of support members are also arranged at intervals in the cathode chamber. The number of support members divide the cathode chamber into a number of cathode areas, and each cathode area is filled with a three-dimensional elastic net, which is elastically connected between the bottom of the cathode chamber and the electrode mesh.

[0011] Preferably, the three-dimensional elastic net is a three-dimensional elastic nickel woven net in the shape of a rectangular parallelepiped.

[0012] Preferably, the three-dimensional elastic nickel braided mesh is a hollow three-dimensional elastic nickel braided mesh.

[0013] Preferably, the support member is a support member with a U-shaped cross-section, and the end of the three-dimensional elastic net is embedded in a U-shaped gap of the support member with a U-shaped cross-section.

[0014] Preferably, a pair of support members with U-shaped cross-sections are arranged back to back between adjacent anode regions.

[0015] Preferably, the support member is arranged upright, and a plurality of waist-shaped holes for conveniently fixing the three-dimensional elastic nickel braided mesh are opened on the support member along the up-down direction.

[0016] Preferably, the electrode mesh is one of a nickel mesh, a platinum-coated nickel mesh or a ruthenium-coated nickel mesh.

[0017] In the utility model, flanges are respectively arranged on the anode chamber and the cathode chamber on one side where the anode chamber and the cathode chamber are opposite to each other, and a plurality of screw fastening holes are arranged on the flanges; after the plurality of electrolytic unit cells are stacked together in sequence, they are fixed together by fastening screws passing through the screw fastening holes and insulating members and nuts arranged on the fastening screws.

[0018] In the utility model, the electrolytic cell for producing hydrogen by electrolysis of water is a dual-working mode electrolytic cell for producing hydrogen by electrolysis of water, which is provided with a hydrogen production mode by electrolysis of alkaline water and a hydrogen production mode by PEM. When the electrolytic cell for producing hydrogen by electrolysis of water is set to the hydrogen production mode by electrolysis of alkaline water, the diaphragm used is a PPS diaphragm or a composite diaphragm. When the electrolytic cell for producing hydrogen by electrolysis of water is set to the hydrogen production mode by electrolysis of alkaline water, the diaphragm used is a proton exchange membrane loaded with iridium oxide and graphite.

[0019] In the present invention, the electrolysis process parameters in the electrolysis alkaline water hydrogen production mode are: the electrolyte is 30% potassium hydroxide and is preheated to 90°C, and the current density is set to 2000-3000A / m 2 The electrolysis process parameters in the PEM hydrogen production mode are as follows: deionized water is used as the electrolyte, the electrolyte enters the electrolytic cell at room temperature, and the current density is set to 10000-20000A / m 2 .

[0020] The beneficial effects of the utility model are:

[0021] First, the utility model provides an electrolytic cell for producing hydrogen by electrolyzing water, in which each group of electrolytic cells is composed of an anode electrolytic cell, a cathode electrolytic cell and a plurality of intermediate electrolytic cell cells, which can be installed, disassembled and maintained on site at the user end, thereby reducing the transportation, repair and other costs caused by installation and maintenance at the production end.

[0022] Secondly, the utility model provides an electrolytic cell for producing hydrogen by electrolysis of water, wherein the anode electrolysis unit cell, the cathode electrolysis unit cell and the intermediate electrolysis unit cell group are designed in the same manner, which is convenient for installation and maintenance.

[0023] Thirdly, the utility model provides an electrolytic cell for producing hydrogen by electrolysis of water, in which elastic parts are provided in the cathode and anode chambers in the form of three-dimensional nickel woven mesh, so as to improve the conductivity of the cathode and anode, increase the cathode and anode area, and help reduce the cell voltage and thus reduce energy consumption.

[0024] Fourthly, the utility model provides an electrolytic cell for producing hydrogen by electrolyzing water, in which elastic parts are provided in the cathode and anode chambers in the form of a three-dimensional nickel woven mesh to increase the separation rate of the electrolyte and the gas, thereby improving the hydrogen production efficiency.

[0025] Fourthly, the utility model provides an electrolytic cell for producing hydrogen by electrolyzing water, in which each unit cell can independently control parameters such as liquid inlet and outlet flow, pressure and stability, thereby ensuring consistency of all cathode and anode chambers and improving electrolytic cell performance and service life.

[0026] Fifth, the electrolysis hydrogen production mode can be flexibly switched according to different conditions, so that the advantages of hydrogen production by electrolysis of alkaline water and hydrogen production by PEM can complement each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a water electrolysis hydrogen production electrolyzer of the utility model;

[0028] Figure 2 It is a schematic diagram of the structure of the intermediate electrolysis unit cell;

[0029] Figure 3 It is a schematic diagram of the cathode (anode) chamber structure;

[0030] Figure 4 is a schematic diagram of the electrode structure;

[0031] Figure 5 is a schematic diagram of the elastic member structure;

[0032] Figure 6 It is a schematic diagram of the support structure.

[0033] In the figure: 1, electrolytic cell, 11, anode electrolytic cell, 12, cathode electrolytic cell, 13, intermediate electrolytic cell, 14, anode chamber, 15, cathode chamber, 16, sealing gasket, 17, membrane, 18, liquid inlet, 19, liquid outlet, 21, anode terminal, 22, cathode terminal, 23, electrode, 24, elastic member, 25, support member, 26, flange. DETAILED DESCRIPTION

[0034] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0035] like Figures 1 to 6 FIG. 1 is an embodiment of an electrolytic cell for producing hydrogen by electrolysis of water according to the utility model. Figures 1 to 6 The utility model is shown as a general embodiment of an electrolytic cell 1 for producing hydrogen by electrolysis of water, which is composed of a plurality of electrolytic cell cells stacked and pressed together in sequence, and the electrolytic cell cells are respectively an anode electrolytic cell 11, a cathode electrolytic cell 12 and an intermediate electrolytic cell 13. The anode electrolytic cell 11, the cathode electrolytic cell 12 and the intermediate electrolytic cell 13 are respectively arranged on both sides and in the middle of the electrolytic cell. The intermediate electrolytic cell includes components such as an anode chamber 14, a cathode chamber 15, a sealing gasket 16, and a membrane 17. The anode electrolytic cell 11 and the cathode cell 12 are the same as the intermediate cell 13 except for the anode terminal 21 and the cathode terminal 22. The anode electrolytic cell 11, the cathode electrolytic cell 12 and the intermediate electrolytic cell 13 are all provided with components such as a liquid inlet 18, a liquid outlet 19, an electrode 23, an elastic member 24, a support member 25, a flange 26, and a fastening screw. The anode electrolysis unit cell 11, the cathode electrolysis unit cell 12 and the intermediate electrolysis unit cell 13 are all made of nickel. The electrode 23 is divided into an anode and a cathode, which are respectively arranged in the anode chamber 14 and the cathode chamber 15, and are all nickel mesh, platinum-coated nickel mesh or ruthenium-coated nickel mesh. The elastic member 24 is a three-dimensional nickel woven mesh. The support member 25 is made of nickel material into a U-shaped structure. The flange is provided with a plurality of screw fastening holes. The anode chamber 14, the sealing gasket 16, the membrane 17, the sealing gasket 16 and the cathode chamber 15 are sequentially combined together and installed together with screws and insulating parts.

[0036] The liquid inlets 18 of the anode electrolysis unit cell 11, the cathode electrolysis unit cell 12 and the intermediate electrolysis unit cells 13 are simultaneously connected to the liquid inlet main pipe, and the liquid outlets 19 are connected to the liquid outlet main pipe. Each unit cell can independently control the parameters such as the liquid inlet and outlet flow, pressure and stability, which can ensure the consistency of all cathode and anode chambers and improve the performance and service life of the electrolytic cell.

[0037] The parameters for electrolytic alkaline hydrogen production are set as follows: 30% potassium hydroxide is used as the electrolyte and preheated to 90°C, the current density is set to 2000-3000A / m2, and the membrane is selected from PPS membrane or composite diaphragm to electrolyze alkaline water to produce hydrogen.

[0038] The parameters for hydrogen production using PEM are set as follows: deionized water is used as the electrolyte, it enters the electrolyzer at room temperature, the current density is set to 10000-20000A / m2, and the membrane is a proton exchange membrane loaded with iridium oxide and graphite, and PEM electrolysis is used to produce hydrogen.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production electrolyzer, characterized in that: It is composed of a plurality of electrolytic unit cells stacked and pressed together in sequence, wherein the plurality of electrolytic unit cells are respectively an anode electrolytic unit cell, a cathode electrolytic unit cell and a plurality of intermediate electrolytic unit cells located between the anode electrolytic unit cell and the cathode electrolytic unit cell; each of the electrolytic unit cells is formed by an anode chamber and a cathode chamber mating together, and an anode side sealing gasket, a diaphragm and a cathode side sealing gasket are sequentially arranged between the mating surfaces of the anode chamber and the cathode chamber; the anode chamber of each of the electrolytic unit cells is respectively provided with an independent anode chamber liquid inlet and an independent anode chamber liquid outlet, and the cathode chamber of each of the electrolytic unit cells is respectively provided with an independent cathode chamber liquid inlet and an independent cathode chamber liquid outlet; the anode chamber is provided with an anode terminal, and the cathode chamber is provided with a cathode terminal.

2. A water electrolysis hydrogen production electrolyzer according to claim 1, characterized in that: The anode electrolysis unit cell and the cathode unit cell are the same as the middle electrolysis unit cell except for the anode terminal and the cathode terminal.

3. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, characterized in that: An electrode mesh is arranged in the anode chamber near the diaphragm, and a number of support members are also arranged in the anode chamber. The support members divide the anode chamber into a number of anode areas, and each anode area is filled with a three-dimensional elastic net, which is elastically connected between the bottom of the anode chamber and the electrode mesh.

4. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, characterized in that: An electrode mesh is arranged in the cathode chamber near the diaphragm, and a number of support members are arranged at intervals in the cathode chamber. The support members divide the cathode chamber into a number of cathode areas, and each cathode area is filled with a three-dimensional elastic net, which is elastically connected between the bottom of the cathode chamber and the electrode mesh.

5. A water electrolysis hydrogen production electrolyzer according to claim 3 or 4, characterized in that: The three-dimensional elastic net is a three-dimensional elastic nickel braided net in the shape of a rectangular parallelepiped.

6. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 5, characterized in that: The support member is a support member with a U-shaped cross section, and the end of the three-dimensional elastic net is embedded in the U-shaped gap of the support member with a U-shaped cross section.

7. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 3, characterized in that: The electrode mesh is one of a nickel mesh, a platinum-coated nickel mesh or a ruthenium-coated nickel mesh.

8. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, characterized in that: Flanges are respectively arranged on the anode chamber and the cathode chamber on one side where the anode chamber and the cathode chamber are opposite to each other, and a plurality of screw fastening holes are arranged on the flanges; after the plurality of electrolytic unit cells are stacked together in sequence, they are fixed together by fastening screws passing through the screw fastening holes and insulating members and nuts arranged on the fastening screws.

9. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The electrolytic water hydrogen production electrolyzer is a dual-working mode electrolytic water hydrogen production electrolyzer provided with an alkaline water electrolysis hydrogen production mode and a PEM hydrogen production mode; when the electrolytic water hydrogen production electrolyzer is set to the alkaline water electrolysis hydrogen production mode, the diaphragm used is a PPS diaphragm or a composite diaphragm; when the electrolytic water hydrogen production electrolyzer is set to the PEM hydrogen production mode, the diaphragm used is a proton exchange membrane loaded with iridium oxide and graphite.

10. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 9, characterized in that: The electrolysis process parameters in the electrolysis alkaline water hydrogen production mode are: the electrolyte is 30% potassium hydroxide and preheated to 90°C, and the current density is set to 2000-3000A / m 2 The electrolysis process parameters in the PEM hydrogen production mode are as follows: deionized water is used as the electrolyte, the electrolyte enters the electrolytic cell at room temperature, and the current density is set to 10000-20000A / m 2 .

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