Green electricity hydrogen production electrolytic bath structure

Abstract

The utility model provides a green electricity hydrogen production electrolytic bath structure which 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 utility model relates to the technical field of renewable energy water electrolysis hydrogen production equipment, which can ensure uniform flow distribution in an electrolytic bath by arranging double liquid inlets and prolong the service life of the electrolytic bath; 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 utility model belongs to renewable energy water electrolysis hydrogen production equipment technical field, especially relates to a green electricity hydrogen production electrolytic cell structure. BACKGROUND

[0002] Hydrogen energy is an ideal secondary energy, compared with other energy, hydrogen heat value is high, and the combustion product is water, it is the most environment-friendly energy, therefore the development of water electrolysis hydrogen production technology will focus on the wide power fluctuation water electrolysis hydrogen production system suitable for multiple scenes.

[0003] The electrolysis water process energy consumption is higher and due to the volatility of wind power, photovoltaic and other power sources, therefore the power fluctuation range and system control of the electrolysis water hydrogen production system are higher, and the future large-scale application scene brings greater challenge to the equipment scale and operation of single body, the existing single equipment scale of the pressurized alkaline water electrolytic cell gradually improves, and more technical challenges are faced, therefore how to break through the traditional structure design is the problem that needs to be solved at present. UTILITY MODEL CONTENTS

[0004] The utility model embodiment provides a green electricity hydrogen production electrolytic cell structure, including 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 positive and negative electrode assembly comprises a positive plate, a negative plate, a plurality of electrode plates and a liquid inlet plate;

[0007] The plurality of electrode plates and liquid inlet plates are arranged between the positive plate and the negative plate, and the negative 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 plate;

[0008] Cathode side electrode nets and anode side electrode nets are arranged on the two sides of each electrode plate, and a diaphragm is arranged on one side of the anode side electrode net;

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

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

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

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

[0014] Preferably, the polar plate is provided with a liquid channel opening, and the polar plate is provided with an air channel opening above the liquid channel opening.

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

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

[0017] Preferably, the diaphragm is a PPS diaphragm, an ion diaphragm or a composite diaphragm, the top of the diaphragm is a gradient structure, and the thickness dimension of the diaphragm near the upper portion is in an increasing state.

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

[0019] The beneficial effects brought by the utility model are as follows:

[0020] (1) The flow distribution in the electrolytic cell can be ensured to be uniform by setting the double liquid inlet, and the service life of the electrolytic cell is improved;

[0021] (2) By setting the double negative electrode and double positive electrode structure, the influence of different electrolytic cell resistances is solved, and the independent operation control of the electrolytic cell is realized, and the flexibility of the system is improved;

[0022] (3) By the sealing mode of the O-ring and the flat gasket combination, the sealing problem under the variable load condition is solved;

[0023] (4) The segmented electrolytic diaphragm is adopted, the hydrogen-oxygen mutual stringing problem in the electrolytic cell is effectively alleviated, and the safety of the system is improved.

[0024] As can be seen from the above scheme, the utility model embodiment provides a green electricity hydrogen production electrolytic cell structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Fig. 1 shows a front view structural schematic diagram of a green electricity hydrogen production electrolytic cell structure according to an embodiment of the utility model;

[0026] Figure 2 Fig. 2 shows a front view structural schematic diagram of a liquid inlet plate in a green electricity hydrogen production electrolytic cell structure according to an embodiment of the utility model;

[0027] Figure 3 Fig. 3 shows a side view structural schematic diagram of a liquid inlet plate in a green electricity hydrogen production electrolytic cell structure according to an embodiment of the utility model;

[0028] Figure 4 A front view structural schematic diagram of a green electricity hydrogen production electrolytic cell structure polar plate of an embodiment of the present application shows;

[0029] Figure 5 A side view structural schematic diagram of a green electricity hydrogen production electrolytic cell structure polar plate of an embodiment of the present application shows;

[0030] Figure 6 A schematic diagram of a green electricity hydrogen production electrolytic cell structure in which the liquid inlet plate is arranged at the position between the positive plate and the negative plate of an embodiment of the present application shows.

[0031] Figure 7 A schematic diagram of a green electricity hydrogen production electrolytic cell structure in which the liquid inlet plate is arranged at the position of the negative plate of an embodiment of the present application shows.

[0032] Figure 8 A schematic diagram of a green electricity hydrogen production electrolytic cell structure in which the liquid inlet plate is arranged at the position of the positive plate of an embodiment of the present application shows.

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

[0034] To make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] A green electricity hydrogen production electrolytic cell structure comprises two end pressing plates 1;

[0036] A plurality of positive and negative electrode assemblies are arranged between the two end pressing 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 comprises a positive plate 5, a negative plate 3, a plurality of polar plates 6 and a liquid inlet plate 4;

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

[0039] The plurality of polar plates 6 and the liquid inlet plate 4 are arranged at a position between the positive plate 5 and the negative plate 3, and the negative plate 3 is arranged at one side of the end pressing plate 1. A second insulating plate 16 is arranged between each end pressing plate 1 and the negative plate 3, and the second insulating plate 16 serves as an insulating plate;

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

[0041] It should be noted that the diaphragm 7 is a PPS diaphragm 7, an ion diaphragm or a composite diaphragm 7. The top of the diaphragm 7 is designed in a gradual manner, and the top is designed in a more dense structure, that is, the thickness dimension near the upper portion is in an increasing state, thereby reducing the mutual intermixing process of the gas in the gas chamber. The diaphragm 7 is used for the isolation of hydrogen and oxygen in the electrolytic cell;

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

[0043] The two end pressing plates 1 are connected to each other by a pull rod 10;

[0044] It should be noted that the pull rod 10 includes a screw rod and a nut. The screw rod is inserted into the two end pressing plates 1, and the nut is matched with the screw rod, so that the plurality of positive and negative electrode assemblies in the two end pressing plates 1 are clamped and fixed. The principle can be referred to the plate-type exchanger. Since it is prior art, no further description is given;

[0045] Specifically, an O-ring 11 and a flat gasket 12 are arranged between the positive plate 5, the negative plate 3, the plurality of polar plates 6 and the liquid inlet plate 4. The O-ring 11 is arranged at one side of the flat gasket 12, which can be the outer ring portion of the flat gasket 12 or the inner ring portion of the flat gasket 12, and is used for sealing between them;

[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 port 13 is arranged on the polar plate 6, and a gas channel port 15 is arranged above the liquid channel port 13 on the polar plate 6;

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

[0050] Specifically, an alkali solution pipeline 17 and a hydrogen and oxygen gas outlet 18 are arranged on the liquid inlet plate 4, and the alkali solution pipeline 17 and the hydrogen and oxygen gas outlet 18 are grounded;

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

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

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

[0054] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A green electricity hydrogen electrolyzer cell structure, characterized by, Two end pressing plates (1) are included. A plurality of positive and negative electrode assemblies are arranged between the two end pressing plates (1), and a first insulating plate (2) is arranged between the plurality of positive and negative electrode assemblies. Each of the positive and negative electrode assemblies comprises a positive plate (5), a negative 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 plate (5) and the negative plate (3), the negative plate (3) is arranged on one side of the end pressing plate (1), and a second insulating plate (16) is arranged between each of the end pressing plates (1) and the negative plate (3). Cathode side electrode grids (8) and anode side electrode grids (9) are 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 grid (9). A sealing structure is arranged between the positive plate (5), the negative plate (3), the plurality of electrode plates (6), and the liquid inlet plate (4). The two end pressing plates (1) are connected to each other by a pull rod (10).

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

3. A green electricity hydrogen electrolyzer cell structure according to claim 1, wherein, The number of the plurality of positive and negative electrode assemblies is not less than 2.

4. A green electricity hydrogen electrolyzer cell structure according to claim 1, wherein, A liquid channel opening (13) is arranged on the electrode plate (6), and an air channel opening (15) is arranged above the liquid channel opening (13) on the electrode plate (6).

5. A green electricity hydrogen electrolyzer cell structure according to claim 1, wherein, An alkali liquid pipeline (17) and a hydrogen-oxygen gas outlet (18) are arranged on the liquid inlet plate (4), and the alkali liquid pipeline (17) and the hydrogen-oxygen gas outlet (18) are grounded.

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

7. A green electricity hydrogen electrolyzer cell structure according to claim 1, wherein, The diaphragm (7) is made of a PPS diaphragm (7), an ion membrane, or a composite diaphragm (7), the top of the diaphragm (7) is a gradient structure, and the thickness dimension of the diaphragm (7) near the upper part increases.

8. A green electricity hydrogen electrolyzer cell structure according to claim 1, wherein, The electrode plate (6), the positive plate (5), and the negative plate (3) are all provided with a papillary structure (14).

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