Green electricity hydrogen production electrolytic bath structure

Abstract

The invention provides a green electricity hydrogen production electrolytic cell structure. The green electricity hydrogen production electrolytic cell structure comprises two end pressing plates; a plurality of positive and negative electrode assemblies are arranged between the two end pressing plates, and first insulating plates are arranged between the positive and negative electrode assemblies; each positive and negative electrode assembly comprises a positive electrode plate, a negative electrode plate, a plurality of electrode plates and a liquid inlet plate; the invention relates to the technical field of renewable energy water electrolysis hydrogen production equipment, uniform flow distribution in an electrolytic bath can be ensured by arranging double liquid inlets, and the service life of the electrolytic bath is prolonged; by arranging a double-cathode and double-anode structure, the influence of different resistances of the electrolytic cell is solved, meanwhile, independent operation control of the electrolytic cell can be realized, and the flexibility of the system is improved; through the combined sealing mode of the O-shaped ring and the flat gasket, the sealing problem under the variable load working condition is systematically solved; and a sectional type electrolytic hydrogen production diaphragm is adopted, so that the problem of hydrogen and oxygen intermixing in the electrolytic bath is effectively relieved, and the safety of the system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of renewable energy water electrolysis hydrogen production equipment, and in particular relates to a green electricity hydrogen production electrolytic cell structure. Background Art

[0002] Hydrogen is an ideal secondary energy source. Compared with other energy sources, hydrogen has a high calorific value and its combustion product is water. It is the most environmentally friendly energy source and is considered to be the ultimate energy source for future human society. The development of clean hydrogen energy is imperative, so the development of water electrolysis hydrogen production technology will focus on wide power fluctuation water electrolysis hydrogen production systems suitable for multiple scenarios.

[0003] The water electrolysis process has high energy consumption and due to the volatility of power sources such as wind power and photovoltaics, higher requirements are placed on the power fluctuation range and system control of the water electrolysis hydrogen production system. At the same time, future large-scale application scenarios will bring greater challenges to the scale and operation of single equipment. The scale of existing pressurized alkaline water electrolyzer single equipment has gradually increased, and it also faces more technical challenges. Therefore, how to break through the traditional structural design is an issue that urgently needs to be solved. Summary of the invention

[0004] An embodiment of the present invention provides a green electricity hydrogen production electrolyzer structure, comprising two end pressure plates;

[0005] A plurality of positive and negative electrode assemblies are arranged between the two end pressure plates, and a first insulating plate is arranged between the plurality of positive and negative electrode assemblies;

[0006] Each of the positive and negative electrode assemblies comprises a positive electrode plate, a negative electrode plate, a plurality of electrode plates and a liquid inlet plate;

[0007] The plurality of electrode plates and the liquid inlet plate are arranged between the positive electrode plate and the negative electrode plate, the negative electrode plate is arranged on one side of the end pressure plate, and a second insulating plate is arranged between each end pressure plate and the negative electrode plate;

[0008] Each of the electrode plates is provided with a cathode side electrode net and an anode side electrode net on both sides, and a diaphragm is provided on one side of the anode side electrode net;

[0009] A sealing structure is provided between the positive electrode plate, the negative electrode plate, the plurality of electrode plates and the liquid inlet plate;

[0010] The two end pressure plates are connected to each other via a pull rod.

[0011] Preferably, the sealing structure includes an O-ring and a flat gasket;

[0012] The O-ring and the flat gasket are arranged between the positive plate, the negative plate, the plurality of the plates and the liquid inlet plate, and the O-ring is arranged on one side of the flat gasket.

[0013] Preferably, the number of the plurality of positive and negative electrode assemblies is not less than.

[0014] Preferably, a liquid passage opening is provided on the electrode plate, and an air passage opening is provided on the electrode plate and above the liquid passage opening.

[0015] Preferably, the liquid inlet plate is provided with an alkaline solution pipeline and a hydrogen and oxygen gas outlet, and the alkaline solution pipeline and the hydrogen and oxygen gas outlet are grounded.

[0016] Preferably, the liquid inlet plate in each of the positive and negative electrode assemblies is arranged between the positive electrode plate and the negative electrode plate, or the liquid inlet plate is arranged on one side of the positive electrode plate, or the liquid inlet plate is arranged on one side of the negative electrode plate, or the liquid inlet plate is arranged on one side of the end pressure plate.

[0017] Preferably, the diaphragm is a PPS diaphragm, an ion membrane or a composite diaphragm, the top of the diaphragm is a gradient structure, and the thickness of the diaphragm increases near the upper part.

[0018] Preferably, the electrode plate, the positive electrode plate and the negative electrode plate are all provided with a mastoid structure.

[0019] The beneficial effects brought by the present invention are as follows:

[0020] (1) By setting up double liquid inlets, the flow distribution inside the electrolytic cell can be uniform, thereby improving the life of the electrolytic cell;

[0021] (2) By setting up a dual negative electrode and dual positive electrode structure, the influence of different resistances of the electrolytic cell is solved, and the independent operation control of the electrolytic cell can be realized, thereby improving the flexibility of the system;

[0022] (3) The system solves the sealing problem under variable load conditions by using a combination of O-rings and flat gaskets for sealing;

[0023] (4) The use of segmented electrolysis hydrogen production diaphragm can effectively alleviate the problem of hydrogen and oxygen cross-talk inside the electrolyzer and improve the safety of the system.

[0024] It can be seen from the above scheme that an embodiment of the present invention provides a green electricity hydrogen production electrolyzer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing the front view of a green electricity hydrogen production electrolyzer structure according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram showing the main structure of a liquid inlet plate in a green electricity hydrogen production electrolyzer structure according to an embodiment of the present invention;

[0027] Figure 3 A schematic diagram showing the side structure of a liquid inlet plate in a green electricity hydrogen production electrolyzer structure according to an embodiment of the present invention;

[0028] Figure 4 A schematic diagram showing the main structure of a green electricity hydrogen production electrolyzer structure plate according to an embodiment of the present invention;

[0029] Figure 5 A schematic diagram showing the side view of a structure plate of a green electricity hydrogen production electrolyzer according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of a green electricity hydrogen production electrolyzer structure in which a liquid inlet plate is arranged between a positive electrode plate and a negative electrode plate according to an embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of a green electricity hydrogen production electrolyzer structure in which a liquid inlet plate is arranged at the negative electrode plate position according to an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of a green electricity hydrogen production electrolyzer structure in which a liquid inlet plate is arranged at the positive electrode plate position according to an embodiment of the present invention.

[0033] In the figure, 1 is an end pressure plate, 2 is a first insulating plate, 3 is a negative electrode plate, 4 is a liquid inlet plate, 5 is a positive electrode plate, 6 is an electrode plate, 7 is a diaphragm, 8 is a cathode side electrode net, 9 is an anode side electrode net, 10 is a pull rod, 11 is an O-ring, 12 is a flat gasket, 13 is a liquid channel port, 14 is a mastoid structure, 15 is an airway port, 16 is a second insulating plate, 17 is an alkali solution pipeline, and 18 is a hydrogen and oxygen outlet. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] A green electricity hydrogen production electrolyzer structure comprises two end pressure plates 1;

[0036] A plurality of positive and negative electrode assemblies are arranged between the two end pressure plates 1, and a first insulating plate 2 is arranged between the plurality of positive and negative electrode assemblies;

[0037] Each positive and negative electrode assembly includes a positive electrode plate 5, a negative electrode plate 3, a plurality of electrode plates 6 and a liquid inlet plate 4;

[0038] It should be noted that when multiple positive and negative electrode assemblies are installed between two end pressure plates 1, the positive electrode plate 5 in one positive and negative electrode assembly is installed opposite to the positive electrode plate 5 in another positive and negative electrode assembly, and the first insulating plate 2 is arranged between the two to play an insulating role;

[0039] A plurality of electrode plates 6 and a liquid inlet plate 4 are arranged between the positive electrode plate 5 and the negative electrode plate 3. The negative electrode plate 3 is arranged on one side of the end pressure plate 1. A second insulating plate 16 is arranged between each end pressure plate 1 and the negative electrode plate 3. The second insulating plate 16 plays an insulating role.

[0040] A cathode side pole net 8 and an anode side pole net 9 are respectively arranged on both sides of each pole plate 6, and a diaphragm 7 is arranged on one side of the anode side pole net 9;

[0041] It should be noted that the diaphragm 7 adopts a PPS diaphragm 7, an ion membrane or a composite diaphragm 7, and the top of the diaphragm 7 adopts a gradual design, and the top adopts a denser structural design, that is, the thickness dimension near the upper part is increased, which reduces the gas cross-talk process at the top of the gas chamber. The diaphragm 7 is used to isolate hydrogen and oxygen inside the electrolyzer;

[0042] A sealing structure is provided between the positive electrode plate 5, the negative electrode plate 3, the plurality of electrode plates 6 and the liquid inlet plate 4;

[0043] The two end pressure plates 1 are connected to each other via a tie rod 10;

[0044] It should be noted that the pull rod 10 includes a screw and a nut, which are inserted into the two end pressure plates 1 through the screw, and the multiple positive and negative electrode components in the two end pressure plates 1 are clamped and fixed through the cooperation of the nut and the screw. The principle can be referred to the plate exchanger. Since it is a prior art, it will not be described in detail.

[0045] Specifically, the O-ring 11 and the flat gasket 12 are arranged between the positive plate 5, the negative plate 3, the plurality of plates 6 and the liquid inlet plate 4, and the O-ring 11 is arranged on one side of the flat gasket 12, which can be the outer ring part of the flat gasket 12 or the inner ring part of the flat gasket 12, for sealing therebetween;

[0046] It should be noted that the flat gasket 12 is made of modified polytetrafluoroethylene material;

[0047] Specifically, the number of the plurality of positive and negative electrode assemblies is not less than 2;

[0048] Specifically, a liquid channel opening 13 is provided on the electrode plate 6, and an air channel opening 15 is provided on the electrode plate 6 and above the liquid channel opening 13;

[0049] It should be noted that the liquid channel opening 13 is used for the circulation of alkali solution, and the gas channel opening 15 is used for the circulation of hydrogen and oxygen gases;

[0050] Specifically, the liquid inlet plate 4 is provided with an alkaline solution pipeline 17 and a hydrogen and oxygen gas outlet 18, and the alkaline solution pipeline 17 and the hydrogen and oxygen gas outlet 18 are grounded;

[0051] It should be noted that the alkali liquid pipeline 17 is used to add alkali liquid to the electrolytic cell, and the hydrogen and oxygen outlet 18 is used to discharge the gas generated in the electrolytic cell; the outlet pipelines of hydrogen or oxygen of the electrolytic cell are combined or separately led to the inlet of the gas-liquid processor, and the alkali liquid pipeline 17 and the hydrogen and oxygen outlet 15 are grounded;

[0052] Specifically, the liquid inlet plate 4 in each positive and negative electrode assembly is arranged between the positive electrode plate 5 and the negative electrode plate 3, or the liquid inlet plate 4 is arranged on one side of the positive electrode plate 5, or the liquid inlet plate 4 is arranged on one side of the negative electrode plate 3, or the liquid inlet plate 4 is arranged on one side of the end pressure plate 1;

[0053] Specifically, the pole plate 6 , the positive pole plate 5 and the negative pole plate 3 are all provided with a mastoid structure 14 .

[0054] The above are preferred embodiments 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A green electricity hydrogen production electrolyzer structure, characterized in that: It comprises two end pressure plates (1); A plurality of positive and negative electrode assemblies are arranged between the two end pressure plates (1), and a first insulating plate (2) is arranged between each of the plurality of positive and negative electrode assemblies; Each of the positive and negative electrode assemblies comprises a positive electrode plate (5), a negative electrode plate (3), a plurality of electrode plates (6) and a liquid inlet plate (4); The plurality of electrode plates (6) and the liquid inlet plate (4) are arranged between the positive electrode plate (5) and the negative electrode plate (3); the negative electrode plate (3) is arranged on one side of the end pressure plate (1); and a second insulating plate (16) is arranged between each end pressure plate (1) and the negative electrode plate (3); A cathode side electrode net (8) and an anode side electrode net (9) are respectively arranged on both sides of each of the electrode plates (6), and a diaphragm (7) is arranged on one side of the anode side electrode net (9); A sealing structure is provided between the positive electrode plate (5), the negative electrode plate (3), the plurality of electrode plates (6) and the liquid inlet plate (4); The two end pressure plates (1) are connected to each other via a pull rod (10).

2. A green electricity hydrogen production electrolyzer structure according to claim 1, characterized in that: The sealing structure comprises an O-ring (11) and a flat gasket (12); The O-ring (11) and the flat gasket (12) are arranged between the positive electrode plate (5), the negative electrode plate (3), the plurality of electrode plates (6) and the liquid inlet plate (4), and the O-ring (11) is arranged on one side of the flat gasket (12).

3. The green electricity hydrogen production electrolyzer structure according to claim 1 is characterized in that: The number of the plurality of positive and negative electrode assemblies is no less than 2.

4. The green electricity hydrogen production electrolyzer structure according to claim 1 is characterized in that: The electrode plate (6) is provided with a liquid passage opening (13), and an air passage opening (15) is provided on the electrode plate (6) and above the liquid passage opening (13).

5. The green electricity hydrogen production electrolyzer structure according to claim 1, characterized in that: The liquid inlet plate (4) is provided with an alkaline solution pipeline (17) and a hydrogen and oxygen gas outlet (18), and the alkaline solution pipeline (17) and the hydrogen and oxygen gas outlet (18) are grounded.

6. The green electricity hydrogen production electrolyzer structure according to claim 1, characterized in that: The liquid inlet plate (4) in each of the positive and negative electrode assemblies is arranged between the positive electrode plate (5) and the negative electrode plate (3), or the liquid inlet plate (4) is arranged on one side of the positive electrode plate (5), or the liquid inlet plate (4) is arranged on one side of the negative electrode plate (3), or the liquid inlet plate (4) is arranged on one side of the end pressure plate (1).

7. The green electricity hydrogen production electrolyzer structure according to claim 1 is characterized in that: The diaphragm (7) is a PPS diaphragm (7), an ion membrane or a composite diaphragm (7). The top of the diaphragm (7) is a gradual structure, and the thickness of the diaphragm (7) increases near the upper part.

8. The green electricity hydrogen production electrolyzer structure according to claim 1, characterized in that: The pole plate (6), the positive pole plate (5) and the negative pole plate (3) are all provided with a mastoid structure (14).

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