Assembly type electrolysis unit and assembly type electrolysis set

Abstract

The embodiment of the utility model provides an assembly type electrolysis unit and an assembly type electrolysis set, and relates to the field of water electrolysis hydrogen production. According to the utility model, the cathode body is mounted by using the cathode frame, the anode body is mounted by using the anode frame, and the cathode assembly, the diaphragm and the anode assembly are quickly mounted by assembling the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame through the mounting holes in the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame; and a plurality of assembly type electrolysis units can be assembled by utilizing the positioning grooves in the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame to form the assembly type electrolysis set. Compared with the prior art, each independent electrolysis unit can be independently controlled, and can also be independently mounted and maintained, so that the maintenance difficulty, time and cost of the industrial electrolysis bath can be greatly reduced, the reliability and stability of a large-scale electrolysis system can be remarkably improved, and the development and application of a water electrolysis technology can be greatly promoted.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen production by electrolyzing water, and more specifically, to an assembled electrolysis unit and an assembled electrolysis set. Background Technique

[0002] Hydrogen production by electrolyzing water is a widely used method for producing green hydrogen at present. Classified by electrolysis medium, electrolysis water technologies mainly include alkaline electrolysis water, acidic electrolysis water (also known as proton exchange membrane electrolysis water), and high-temperature steam electrolysis. However, regardless of the electrolysis method used, multiple electrolysis chambers need to be stacked and combined to obtain an electrolytic cell with a larger power or gas production. For example, by combining 300 alkaline electrolysis chambers with a diameter of 1.85 meters, an alkaline electrolytic cell with a gas production of about 1000 m 3 / h can be obtained; another example is that by stacking and combining 100 acidic electrolysis chambers with a diameter of 1 meter, an acidic electrolytic cell with a gas production of about 300 m 3 / h can be obtained.

[0003] At present, the mainstream electrolytic cells on the market all have the problems of large volume and heaviness. The alkaline electrolytic cell with a gas production of 1000 m 3 / h can weigh up to 50 tons and have a length of up to 10 meters, and large lifting equipment is required for assembly, transportation, installation and other links. With the progress of technology and the development of the market, electrolytic cells with a larger gas production will be needed in the future. For example, for an alkaline electrolytic cell with a gas production of 10000 m 3 / h, if the current stacking and combination scheme is still used, the weight of the electrolytic cell may exceed 100 tons and the length may reach 100 meters in the future, which seriously limits the application and maintenance of large-scale hydrogen production electrolytic cells, and at the same time its cost will also increase significantly.

[0004] Therefore, there is an urgent need to improve the electrolysis device at present to significantly reduce costs, volume and weight while obtaining a larger gas production.

[0005] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0006] The purpose of the present utility model is to provide an assembled electrolysis unit and an assembled electrolysis set, which can significantly reduce costs, volume and weight while obtaining a larger gas production.

[0007] The embodiments of the present utility model can be implemented as follows:

[0008] In a first aspect, the present utility model provides an assembled electrolysis unit, including a cathode assembly, a diaphragm, and an anode assembly. The cathode assembly is used to be installed on one side of the diaphragm, and the anode assembly is used to be installed on the other side of the diaphragm;

[0009] The cathode assembly includes a cathode bottom plate, a cathode frame, and a cathode body. The cathode body includes a conductive medium with the ability to catalyze hydrogen evolution during electrolysis of water. The cathode frame has a cathode hollow groove for installing the cathode body through the cathode hollow groove. The cathode bottom plate has an installation surface for assembling with the cathode frame, and a plurality of cathode guide posts are provided on the installation surface of the cathode bottom plate;

[0010] The anode assembly includes an anode bottom plate, an anode frame, and an anode body. The anode body includes a conductive medium with the ability to catalyze oxygen evolution during electrolysis of water. The anode frame has an anode hollow groove for installing the anode body through the anode hollow groove. The anode bottom plate has an installation surface for assembling with the anode frame, and a plurality of anode guide posts are provided on the installation surface of the anode bottom plate;

[0011] Position - corresponding mounting holes are provided on the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame to assemble the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame through the mounting holes;

[0012] Positioning grooves are provided on the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame to assemble a plurality of assembled electrolysis units through the positioning grooves.

[0013] In an alternative embodiment, the cathode guide posts on the cathode bottom plate include a plurality of first cathode guide posts, a plurality of second cathode guide posts, and a plurality of third cathode guide posts. The first cathode guide posts are all distributed in the first cathode guide area, the second cathode guide posts are all distributed in the second cathode guide area, and the third cathode guide posts are all distributed in the third cathode guide area. The first cathode guide area and the third cathode guide area are located on both sides of the second cathode guide area. The second cathode guide area accounts for 40% - 60% of the area of the cathode bottom plate;

[0014] And / or, the anode guide posts on the anode bottom plate include a plurality of first anode guide posts, a plurality of second anode guide posts, and a plurality of third anode guide posts. The first anode guide posts are all distributed in the first anode guide area, the second anode guide posts are all distributed in the second anode guide area, and the third anode guide posts are all distributed in the third anode guide area. The first anode guide area and the third anode guide area are located on both sides of the second anode guide area. The second anode guide area accounts for 40% - 60% of the area of the anode bottom plate.

[0015] In an alternative embodiment, the ratio of the height of the cathode guide posts to the height of the anode guide posts is (1.5 - 2.5):1;

[0016] And / or, the projection of the second cathode guide post on the cathode bottom plate is oval or teardrop - shaped, and the projection of the second anode guide post on the anode bottom plate is oval or teardrop - shaped;

[0017] And / or, the shapes of the first cathode current collector post, the third cathode current collector post, the first anode current collector post, and the third anode current collector post are each selected from at least one of comb-shaped, tooth-shaped, grid-shaped, mesh-shaped, and dot matrix-shaped;

[0018] And / or, the assembled electrolysis unit is rectangular, with side lengths of 0.5 m - 5 m, the distance between adjacent cathode current collector posts is 0.5 cm - 5 cm, and the distance between adjacent anode current collector posts is 0.5 cm - 5 cm.

[0019] In an alternative embodiment, the positioning grooves on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame are all located at the edges, and there are more than two positioning grooves, and the positions of the positioning grooves on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame correspond to each other;

[0020] And / or, it further includes a cathode seal and an anode seal. The cathode seal is located between the cathode bottom plate and the cathode cell frame, and the anode seal is located between the anode bottom plate and the anode cell frame.

[0021] In an alternative embodiment, the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame each have a first positioning side, a second positioning side opposite to the first positioning side, and a third positioning side located between the first positioning side and the second positioning side. A first positioning groove is provided on the first positioning side, a second positioning groove is provided on the second positioning side, and a third positioning groove and a fourth positioning groove are provided on the third positioning side;

[0022] And / or, a cathode terminal is provided on the cathode cell frame, and an anode terminal is provided on the anode cell frame. In the use state, the cathode terminal is connected to the negative electrode of the power supply through a cathode wire, and the anode terminal is connected to the positive electrode of the power supply through an anode wire.

[0023] In an alternative embodiment, it further includes a first support rail, a second support rail, a third support rail, and a fourth support rail. The first positioning groove on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame cooperates with the first support rail, the second positioning groove cooperates with the second support rail, the third positioning groove cooperates with the third support rail, and the fourth positioning groove cooperates with the fourth support rail.

[0024] In an alternative embodiment, a cathode electrolyte inlet and a cathode gas-liquid outlet opposite to the cathode electrolyte inlet are provided on the cathode cell frame;

[0025] An anode electrolyte inlet and an anode gas-liquid outlet opposite to the anode electrolyte inlet are provided on the anode cell frame.

[0026] In an alternative embodiment, it further includes a connector. There are multiple mounting holes, and all the multiple mounting holes are located around the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame;

[0027] The connecting piece passes through the mounting holes on the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame to assemble the electrolysis unit;

[0028] And / or, the cathode electrolyte inlet and the anode electrolyte inlet are respectively located on both sides of the electrolysis unit, and the cathode gas-liquid outlet and the anode gas-liquid outlet are respectively located on both sides of the electrolysis unit.

[0029] In an optional embodiment, the cathode electrolyte inlet is connected to the cathode electrolyte input pipeline and the electrolyte recovery pipeline through a three-way valve, and the cathode electrolyte input pipeline is connected to an electrolyte circulation pump or an alkali tank; the cathode gas-liquid outlet is connected to the cathode gas-liquid output pipeline and an inert gas pipeline through a three-way valve, and the cathode gas-liquid output pipeline is connected to a cathode gas-liquid treatment component;

[0030] And / or, the anode electrolyte inlet is connected to the anode electrolyte input pipeline and the electrolyte recovery pipeline through a three-way valve, the anode electrolyte input pipeline is connected to an electrolyte circulation pump or an alkali tank, and the anode gas-liquid outlet is connected to the anode gas-liquid output pipeline and an inert gas pipeline through a three-way valve, and the anode gas-liquid output pipeline is connected to an anode gas-liquid treatment component.

[0031] In a second aspect, the present utility model provides an assembled electrolysis set, which includes an electrolysis stack, and the electrolysis stack is formed by cumulatively combining a plurality of the assembled electrolysis units in any one of the foregoing embodiments.

[0032] The beneficial effects of the embodiments of the present utility model include: the present utility model uses the cathode frame to install the cathode body and the anode frame to install the anode body, and assembles through the mounting holes on the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame to realize the quick installation of the cathode assembly, the diaphragm and the anode assembly. The positioning grooves on the cathode bottom plate, the cathode frame, the anode bottom plate and the anode frame can be used to assemble a plurality of assembled electrolysis units to form an assembled electrolysis set. Using the assembled electrolysis unit provided by the present utility model is convenient for realizing enlarged assembly, can reduce the requirements for hoisting equipment, improve the maintainability and stability of the electrolytic cell, greatly reduce the weight of the electrolytic cell and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the assembled electrolysis unit provided by the embodiment of the present utility model;

[0035] Figure 2 is Figure 1 the exploded view of the main components of the electrolysis unit in

[0036] Figure 3 is Figure 2 the schematic diagram of the cathode bottom plate in

[0037] Figure 4 is Figure 2 the schematic diagram of the anode bottom plate in

[0038] Figure 5 is Figure 2 the schematic diagram of the cathode frame in

[0039] Figure 6 is Figure 2 the schematic diagram of the anode frame in

[0040] Figure 7 is the connection diagram of the electrolysis unit;

[0041] Figure 8 is the schematic diagram of the cumulative assembly of the electrolysis unit;

[0042] Figure 9 is the connection diagram of the high-power electrolysis stack;

[0043] Figure 10 is the schematic diagram of the cathode bottom plate provided in another embodiment of the present utility model;

[0044] Figure 11 is the schematic diagram of the anode bottom plate provided in another embodiment of the present utility model;

[0045] Figure 12 is another schematic diagram of the cumulative assembly of the electrolysis unit;

[0046] Figure 13 is the schematic diagram of the cathode bottom plate provided in other embodiments of the present utility model;

[0047] Figure 14 is the connection diagram of the electrolysis unit in other embodiments of the present utility model;

[0048] Figure 15 is the schematic diagram of the cumulative assembly in other embodiments of the electrolysis unit.

[0049] Icons: 10 - Prefabricated electrolytic cell; 100 - Prefabricated electrolytic unit; 110 - Cathode assembly; 111 - Cathode bottom plate; 112 - Cathode frame; 113 - Cathode body; 114 - Cathode hollow groove; 115 - Cathode guide post; 1151 - First cathode guide post; 1152 - Second cathode guide post; 1153 - Third cathode guide post; 116 - Cathode seal; 117 - Cathode terminal; 118 - Cathode electrolyte inlet; 119 - Cathode gas-liquid outlet; 120 - Diaphragm; 130 - Anode assembly; 131 - Anode bottom plate; 132 - Anode frame; 133 - Anode body; 134 - Anode hollow groove; 135 - Anode guide post; 1351 - First anode guide post; 1352 - Second anode guide post; 1353 - Third anode guide post; 136 - Anode seal; 137 - Anode terminal; 138 - Anode electrolyte inlet; 139 - Anode gas-liquid outlet; 141 - Mounting hole; 142 - Positioning groove; 1421 - First positioning groove; 1422 - Second positioning groove; 1423 - Third positioning groove; 1424 - Fourth positioning groove; 143 - First positioning side; 144 - Second positioning side; 145 - Third positioning side; 146 - First support rail; 147 - Second support rail; 148 - Third support rail; 149 - Fourth support rail; 001 - Cathode electrolyte input pipe; 002 - Cathode gas-liquid output pipe; 004 - Anode electrolyte input pipe; 005 - Anode gas-liquid output pipe; 006 - Cathode wire; 007 - Anode wire; 008 - Connector; 003 - Cathode side; 009 - Anode side. Detailed implementation mode

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0052] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0053] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0054] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0055] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0056] Please refer to Figure 1 and Figure 2 , this embodiment provides an assembled electrolysis unit 100, which includes a cathode assembly 110, a diaphragm 120, and an anode assembly 130. The cathode assembly 110 is used to be installed on one side of the diaphragm 120, and the anode assembly 130 is used to be installed on the other side of the diaphragm 120 to form a complete electrolysis unit. The electrolysis unit can be directly connected to an external gas-liquid and electrical system to realize small-power electrolytic water for gas production.

[0057] The cathode assembly 110 includes a cathode bottom plate 111, a cathode cell frame 112, and a cathode body 113. The cathode body 113 is installed through the cathode cell frame 112 and then assembled with the cathode bottom plate 111. Similarly, the anode assembly 130 includes an anode bottom plate 131, an anode cell frame 132, and an anode body 133. The anode body 133 is installed through the anode cell frame 132 and then assembled with the anode bottom plate 131.

[0058] The cathode body 113 includes a conductive medium with the ability of electrolytic water hydrogen evolution catalysis. Specifically, it can be composed of a nickel wire mesh, a conductive cloth, a conductive fiber, and a cathode catalyst on its surface. The cathode catalyst can be a general cathode catalyst for electrolytic hydrogen production, such as nickel, nickel-based alloy, platinum, ruthenium, etc. Similarly, the anode body 133 includes a conductive medium with the ability of electrolytic water oxygen evolution catalysis. Specifically, it can be composed of a nickel wire mesh, a conductive cloth, a conductive fiber, and an anode catalyst on its surface. The anode catalyst can be a general anode catalyst for electrolytic hydrogen production, such as nickel, nickel-based alloy, iridium oxide, ruthenium oxide, nickel sulfide, nickel phosphide, etc.

[0059] The size of the diaphragm 120 can be adapted to the sizes of the cathode assembly 110 and the anode assembly 130. The specific material is not limited, and it can be any one of polyphenylene sulfide cloth, ion exchange membrane, composite membrane, and ionic solvent membrane.

[0060] Mounting holes 141 corresponding in position are provided on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131, and the anode frame 132, so that the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131, and the anode frame 132 can be assembled through the mounting holes 141. The mounting holes 141 can be located at the four peripheral edges of the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131, and the anode frame 132, and the positions are corresponding. There can be multiple mounting holes 141. During assembly, a connecting member 008 can be used to pass the connecting member 008 through the mounting holes 141 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131, and the anode frame 132 to realize the assembly of the electrolysis unit. Specifically, the connecting member 008 can be a fastening bolt, but is not limited thereto. An insulating sleeve can be sleeved on the fastening bolt, and the insulating sleeve is made of one or more of polytetrafluoroethylene, soluble polytetrafluoroethylene, polyether ether ketone, and nylon.

[0061] Please refer to Figure 2 , Figure 3 and Figure 4 , the cathode bottom plate 111 has a mounting surface for assembling with the cathode frame 112. A plurality of cathode flow guiding columns 115 are provided on the mounting surface of the cathode bottom plate 111. The cathode flow guiding columns 115 can play a role in guiding the gas generated at the cathode, enabling it to be quickly released, thereby reducing the resistance caused by bubbles. Similarly, the anode bottom plate 131 has a mounting surface for assembling with the anode frame 132. A plurality of anode flow guiding columns 135 are provided on the mounting surface of the anode bottom plate 131. The anode flow guiding columns 135 play a role in guiding the gas generated at the anode, enabling the gas to be quickly released and reducing the resistance caused by bubbles.

[0062] In some embodiments, the cathode flow guiding columns 115 on the cathode bottom plate 111 include a plurality of first cathode flow guiding columns 1151, a plurality of second cathode flow guiding columns 1152, and a plurality of third cathode flow guiding columns 1153. The first cathode flow guiding columns 1151 are all distributed in the first cathode flow guiding area, the second cathode flow guiding columns 1152 are all distributed in the second cathode flow guiding area, and the third cathode flow guiding columns 1153 are all distributed in the third cathode flow guiding area. The first cathode flow guiding area and the third cathode flow guiding area are located on both sides of the second cathode flow guiding area. That is to say, the second cathode flow guiding columns 1152 are distributed in the middle, and the first cathode flow guiding columns 1151 and the third cathode flow guiding columns 1153 are distributed on both sides. The second cathode flow guiding area accounts for 40%-60% of the area of the cathode bottom plate 111, such as 40%, 50%, 60%, etc., and most of the area is distributed with the second cathode flow guiding columns 1152.

[0063] In some embodiments, the anode current conducting posts 135 on the anode bottom plate 131 include a plurality of first anode current conducting posts 1351, a plurality of second anode current conducting posts 1352, and a plurality of third anode current conducting posts 1353. The first anode current conducting posts 1351 are all distributed in the first anode current conducting area, the second anode current conducting posts 1352 are all distributed in the second anode current conducting area, and the third anode current conducting posts 1353 are all distributed in the third anode current conducting area. The first anode current conducting area and the third anode current conducting area are located on both sides of the second anode current conducting area. That is to say, the second anode current conducting posts 1352 are distributed in the middle, and the first anode current conducting posts 1351 and the third anode current conducting posts 1353 are distributed on both sides. The second anode current conducting area accounts for 40%-60% of the area of the anode bottom plate 131, such as 40%, 50%, 60%, etc., and most of the area is distributed with the second anode current conducting posts 1352.

[0064] Specifically, the first cathode current conducting posts 1151, the second cathode current conducting posts 1152, the third cathode current conducting posts 1153, the first anode current conducting posts 1351, the second anode current conducting posts 1352, and the third anode current conducting posts 1353 can be evenly distributed in the corresponding areas to improve the current conducting effect. The materials of the cathode bottom plate 111 and the anode bottom plate 131 are not limited and can be made of one or more of nickel-plated carbon steel, pure nickel, nickel-containing stainless steel, and nickel-based alloys.

[0065] The current conducting posts in each area can be prepared into different shapes. The projection of the second cathode current conducting posts 1152 on the cathode bottom plate 111 is oval or water droplet-shaped, and the projection of the second anode current conducting posts 1352 on the anode bottom plate 131 is oval or water droplet-shaped. The oval or water droplet-shaped has a smaller flow resistance, and the recirculation area can be limited to a very small range, so that the residence of bubbles can be reduced. Therefore, it can play a better role in current conduction in the middle area. The shapes of the first cathode current conducting posts 1151, the third cathode current conducting posts 1153, the first anode current conducting posts 1351, and the third anode current conducting posts 1353 are all selected from at least one of comb-shaped, tooth-shaped, grid-shaped, mesh-shaped, and dot matrix-shaped. The shapes of the first cathode current conducting posts 1151, the third cathode current conducting posts 1153, the first anode current conducting posts 1351, and the third anode current conducting posts 1353 can be the same or different and can be any of the above shapes independently.

[0066] Specifically, the shape of the comb-shaped current conducting post is as Figure 3 and Figure 4 shown, having spaced columnar protrusions; the tooth-shaped can be the shape of small protrusions arranged at intervals; the grid-shaped can be distributed in rows and columns; the mesh-shaped can be in a staggered or intertwined distribution manner; the dot matrix-shaped refers to a distribution manner similar to a matrix.

[0067] Furthermore, the heights of the first cathode current collector post 1151, the second cathode current collector post 1152, and the third cathode current collector post 1153 are approximately the same, and the heights of the first anode current collector post 1351, the second anode current collector post 1352, and the third anode current collector post 1353 are also approximately the same. The ratio of the height of the cathode current collector post 115 to the height of the anode current collector post 135 is (1.5 - 2.5):1, such as 1.5:1, 2.0:1, 2.5:1, etc. The height of the cathode current collector post is greater than that of the anode current collector post 135, which can provide a wider tolerance range for the pressure change in the cathode and anode compartments caused by power fluctuations, enabling the electrolysis system to maintain stability to the maximum extent.

[0068] Furthermore, the assembled electrolysis unit 100 is rectangular, and when the length and width are equal, the assembled electrolysis unit 100 is square. The side length of the assembled electrolysis unit 100 is 0.5 m - 5 m, and the area is 0.25 m 2 - 25 m 2 , and reasonable design of the dimensions can be carried out according to the process requirements. The distance between adjacent cathode current collector posts 115 is 0.5 cm - 5 cm, and the distance between adjacent anode current collector posts 135 is 0.5 cm - 5 cm.

[0069] Please refer to Figure 2 , Figure 5 and Figure 6 , the cathode frame 112 has a cathode hollow groove 114 to install the cathode body 113 through the cathode hollow groove 114, and the size of the cathode hollow groove 114 is adapted to the size of the cathode body 113. Flow channels can be provided above and below the cathode hollow groove 114 for the electrolyte to flow through. Similarly, the anode frame 132 has an anode hollow groove 134 to install the anode body 133 through the anode hollow groove 134, and the size of the anode hollow groove 134 is adapted to the size of the anode body 133. Flow channels can also be provided above and below the anode hollow groove 134 for the electrolyte to flow through.

[0070] Specifically, the materials of the cathode frame 112 and the anode frame 132 are not limited, and can be made of at least one of nickel-plated carbon steel, pure nickel, nickel-based alloy, and nickel-containing stainless steel.

[0071] In some embodiments, a cathode seal 116 and an anode seal 136 are further included. The cathode seal 116 is located between the cathode bottom plate 111 and the cathode frame 112, and the anode seal 136 is located between the anode bottom plate 131 and the anode frame 132 to improve the sealing performance of the device. Specifically, the cathode seal 116 and the anode seal 136 can be made of materials with certain elasticity such as rubber, but are not limited thereto.

[0072] Please refer to Figures 1 - 6, positioning grooves 142 are provided on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 respectively, so as to assemble a plurality of assembled electrolysis units 100 through the positioning grooves 142. The positions on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 are corresponding, which is convenient for positioning through the track to realize the assembly of a plurality of assembled electrolysis units 100.

[0073] In some embodiments, the positioning grooves 142 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 are all located at the edges, and there are more than two positioning grooves 142. The positions of the positioning grooves 142 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 are corresponding, so as to facilitate the positioning track to be embedded into the positioning grooves 142 to realize the assembly of a plurality of assembled electrolysis units 100.

[0074] Please refer to Figure 7 , the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 all have a first positioning side 143, a second positioning side 144 opposite to the first positioning side 143, and a third positioning side 145 located between the first positioning side 143 and the second positioning side 144. First positioning grooves 1421 are provided on the first positioning side 143, second positioning grooves 1422 are provided on the second positioning side 144, and third positioning grooves 1423 and fourth positioning grooves 1424 are provided on the third positioning side 145. The stability of assembly is improved through the four positioning grooves 142. As Figure 7 shown, the assembled electrolysis unit 100 further includes a first support track 146, a second support track 147, a third support track 148 and a fourth support track 149. The first positioning grooves 1421 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 cooperate with the first support track 146, the second positioning grooves 1422 cooperate with the second support track 147, the third positioning grooves 1423 cooperate with the third support track 148, and the fourth positioning grooves 1424 cooperate with the fourth support track 149.

[0075] Furthermore, a cathode terminal 117 is provided on the cathode frame 112, and an anode terminal 137 is provided on the anode frame 132. In the use state, the cathode terminal 117 is connected to the negative pole of the power supply through a cathode wire 006, and the anode terminal 137 is connected to the positive pole of the power supply through an anode wire 007.

[0076] As Figures 5 - 7As shown, a cathode electrolyte inlet 118 and a cathode gas-liquid outlet 119 opposite to the cathode electrolyte inlet 118 are provided on the cathode frame 112. The cathode electrolyte inlet 118 and the cathode electrolyte inlet 118 can be distributed at the diagonals of the cathode installation position. Similarly, an anode electrolyte inlet 138 and an anode gas-liquid outlet 139 opposite to the anode electrolyte inlet 138 are provided on the anode frame 132. The anode electrolyte inlet 138 and the anode gas-liquid outlet 139 can be distributed at the diagonals of the anode installation position. The electrolyte flows in from the electrolyte inlets of the cathode and the anode, and the gases and gas-liquid mixtures generated after electrolysis are respectively output from the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139.

[0077] In some embodiments, the cathode electrolyte inlet 118 and the anode electrolyte inlet 138 are respectively located on both sides of the electrolysis unit, and the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139 are respectively located on both sides of the electrolysis unit to increase the reaction time.

[0078] In some embodiments, the cathode electrolyte inlet 118 is connected to the cathode electrolyte input pipe 001 and the electrolyte recovery pipe through a three-way valve. The cathode electrolyte input pipe 001 is connected to an electrolyte circulation pump or an alkali tank and is regulated according to process requirements. The cathode gas-liquid outlet 119 is connected to the cathode gas-liquid output pipe 002 and an inert gas pipe (such as a nitrogen delivery pipe) through a three-way valve. The cathode gas-liquid output pipe 002 is connected to a cathode gas-liquid treatment component for further treating the generated gas-liquid mixture. Specifically, the cathode gas-liquid treatment component mainly performs operations such as separating, cooling, cleaning, drying, and pressurizing on the generated gas-liquid mixture.

[0079] In some embodiments, the anode electrolyte inlet 138 is connected to the anode electrolyte input pipe 004 and the electrolyte recovery pipe through a three-way valve. The anode electrolyte input pipe 004 is connected to an electrolyte circulation pump or an alkali tank and is regulated according to process requirements. The anode gas-liquid outlet 139 is connected to the anode gas-liquid output pipe 005 and an inert gas pipe (such as a nitrogen delivery pipe) through a three-way valve. The anode gas-liquid output pipe 005 is connected to an anode gas-liquid treatment component for further treating the generated gas-liquid mixture. Specifically, the anode gas-liquid treatment component mainly performs operations such as separating, cooling, cleaning, drying, and pressurizing on the generated gas-liquid mixture.

[0080] Schematic diagram of the assembled multiple modular electrolysis units 100, as Figure 8 shown, the electrolysis power of the electrolysis unit is 1.5 to 200 kilowatts. After the electrolysis units are assembled cumulatively, a cathode side 003 and an anode side 009 are formed, which can meet the requirements of high power and increase the gas production. External pipelines can be further assembled to form a modular electrolysis assembly 10, as Figure 9 shown.

[0081] The embodiment of the present utility model also provides an assembled electrolyzer set 10, which includes an electrolysis stack. The electrolysis stack is formed by cumulatively combining a plurality of the assembled electrolysis units 100 in any one of the foregoing embodiments to obtain a high-power electrolyzer set. The cumulative number of electrolysis units in the high-power electrolyzer set can be 10 to 500, the electrolysis power is 2.5 kW to 100 MW, and the hydrogen production capacity is 0.5 to 20,000 standard cubic meters per hour. During actual assembly, the electrolysis units in the high-power electrolyzer set can be separated from each other or can be close to each other.

[0082] In some embodiments, when the stack units in the high-power electrolyzer set are separated from each other, insulating components can be provided between the electrolysis units, or insulating components can not be provided.

[0083] In some embodiments, when the electrolysis units in the high-power electrolyzer set are close to each other, the electrolysis units can be arranged in the manner of "cathode|anode + insulating part + cathode|anode + insulating part + cathode|anode...", or can be arranged in the manner of "cathode|anode + cathode|anode + cathode|anode...", or can also be arranged in the manner of "cathode|anode + anode|cathode + cathode|anode...".

[0084] It should be noted that the formation process of the assembled electrolyzer set 10 provided by the embodiment of the present utility model is divided into the following steps: (1) processing to obtain a cathode bottom plate 111, an anode bottom plate 131, a cathode frame 112, and an anode frame 132; (2) combining the cathode frame 112 with a cathode body 113 to obtain a cathode unit; combining the anode frame 132 with an anode body 133 to obtain an anode unit; (3) sequentially laminating the cathode bottom plate 111, a cathode seal 116, the cathode unit, a diaphragm 120, the anode unit, an anode seal 136, and the anode bottom plate 131 in order, and fastening and fixing them with fastening bolts to obtain an electrolysis unit that can be used for electrolytic water to produce gas. (4) Fixing the electrolysis unit on a preset track through a first positioning groove 1421, a second positioning groove 1422, a third positioning groove 1423, and a fourth positioning groove 1424, connecting the cathode electrolyte inlet 118 to the cathode electrolyte circulation pipeline and the electrolyte recovery pipeline through a three-way valve, connecting the cathode electro-gas-liquid outlet to a cathode gas-liquid treatment component and a nitrogen pipeline through a three-way valve, connecting the anode electrolyte inlet 138 to the anode electrolyte circulation pipeline and the electrolyte recovery pipeline through a three-way valve, connecting the anode electro-gas-liquid outlet to an anode gas-liquid treatment component and nitrogen through a three-way valve, connecting the cathode terminal 117 to the negative electrode of the power supply, and connecting the anode terminal 137 to the positive electrode of the power supply. The nitrogen pipeline is provided with a nitrogen filling return and an evacuation circuit. (5) Combining a plurality of electrolysis units obtained according to the combination in the third step as needed, and combining the obtained plurality of electrolysis units in a certain arrangement manner to obtain a larger power electrolysis unit assembly, which is called an electrolyzer set.

[0085] Embodiment 1

[0086] This embodiment provides an assembled electrolytic cell 10, and its forming process is as follows:

[0087] (1) Prepare the cathode bottom plate 111 as Figure 3 shown.

[0088] The first comb-shaped cathode current guiding column 1151, elliptical second cathode current guiding column 1152 and comb-shaped third cathode current guiding column 1153 are machined on a steel plate with dimensions of 4m×4m×13mm. The length, width and height of the first cathode current guiding column 1151 and the third cathode current guiding column 1153 are 1mm×2mm×10mm, and they are evenly arranged horizontally at an interval of 2mm. The major axis of the second cathode current guiding column 1152 is 5mm, the minor axis is 2mm, and the height is 10mm. It is evenly arranged according to 50% of the cathode area, and the major axis is arranged vertically and the minor axis is arranged horizontally. Bolt holes with a diameter of 2cm are arranged around the cathode bottom plate 111 at an interval of 10cm, and the first positioning groove 1421, second positioning groove 1422, third positioning groove 1423 and fourth positioning groove 1424 are machined at the specified positions according to the design.

[0089] (2) Prepare the anode bottom plate 131 as Figure 4 shown.

[0090] The first comb-shaped anode current guiding column 1351, elliptical second anode current guiding column 1352 and comb-shaped third anode current guiding column 1353 are machined on a steel plate with dimensions of 4m×4m×8mm. The length, width and height of the first anode current guiding column 1351 and the third anode current guiding column 1353 are 1mm×2mm×5mm, and they are evenly arranged horizontally at an interval of 2mm. The major axis of the second anode current guiding column 1352 is 5mm, the minor axis is 2mm, and the height is 5mm. It is evenly arranged according to 50% of the cathode area, and the major axis is arranged vertically and the minor axis is arranged horizontally. The first positioning groove 1421, second positioning groove 1422, third positioning groove 1423 and fourth positioning groove 1424 are machined at the specified positions according to the design.

[0091] (3) Prepare the cathode frame 112 as Figure 5 shown.

[0092] Bolt holes with an inner diameter of 2cm are drilled around a square steel plate with a thickness of 10mm, an outer dimension of 4m×4m and an inner dimension of 3.8m×3.8m at an interval of 10cm, and they are aligned with the bolt holes of the cathode bottom plate 111 and the anode bottom plate 131. At the same time, the first positioning groove 1421, second positioning groove 1422, third positioning groove 1423 and fourth positioning groove 1424 and the cathode terminal 117 are machined at the specified positions according to the design. A cathode electrolyte inlet 118 with an inner diameter of 8mm is drilled on the first side, and a cathode gas-liquid outlet 119 with an inner diameter of 8mm is machined at the diagonal position on the other side opposite to it.

[0093] (4) Prepare the anode frame 132 as shown in Figure 6

[0094] Drill bolt holes with an inner diameter of 2 cm at intervals of 10 cm around the square steel plate with a thickness of 5 mm, an outer dimension of 4 m x 4 m, and an inner dimension of 3.8 m x 3.8 m, and align them with the bolt holes of the cathode bottom plate 111 and the anode bottom plate 131. At the same time, process the first positioning groove 1421, the second positioning groove 1422, the third positioning groove 1423, and the fourth positioning groove 1424 and the anode terminal 137 at the specified positions according to the design. Drill an anode electrolyte inlet 138 with an inner diameter of 4 mm on the first side, and process an anode gas-liquid outlet 139 with an inner diameter of 4 mm at the diagonal position on the other side opposite thereto;

[0095] (5) Prepare the anode body 133 and the cathode body 113

[0096] Prepare the cathode body 113 containing the cathode catalyst through processes such as thermal spraying, coating sintering, electroplating, electroless plating, etc., and at the same time prepare the anode body 133 containing the anode catalyst.

[0097] (6) Assembly

[0098] Weld the obtained cathode frame 112 and the cathode body 113 together to obtain a cathode unit, and weld the anode frame 132 and the anode body 133 together to obtain an anode unit. Stack and install and fasten the cathode bottom plate 111, the cathode seal 116, the cathode unit, the diaphragm 120, the anode unit, the anode seal 136, and the anode bottom plate 131 in sequence by tightening bolts in the manner shown in Figure 2 Figure 1 the monomer electrolysis unit shown.

[0099] Connect the electrolysis unit to the electrolyte pipeline, the gas-liquid treatment pipeline, and the power supply in the electrolysis system in the manner shown in Figure 7 Figure 8 so that the monomer electrolysis unit can electrolyze water to produce hydrogen and oxygen. Insert 200 monomer electrolysis units in the arrangement pattern of "cathode|anode + cathode|anode +..." as shown in 3 / hour on the preset installation track to form an electrolytic water hydrogen production electrolytic cell with a power of 15 MW, and the hydrogen production amount is 3000 m Figure 9 as shown.

[0100] Example 2

[0101] This example provides an assembled electrolytic cell 10, and its formation process is as follows:

[0102] (1) Prepare the cathode bottom plate 111 as shown in Figure 10 ​​​​

[0103] By machining, a steel plate with dimensions of 5m x 5m x 20mm is processed to obtain a first cathode current collector post 1151 with a comb shape, a circular second cathode current collector post 1152, and a third cathode current collector post 1153 with a comb shape. The first cathode current collector post 1151 and the third cathode current collector post 1153 have a length, width, and height of 1mm x 2mm x 15mm, are evenly arranged horizontally at an interval of 2mm. The second cathode current collector post 1152 has a diameter of 2mm and a height of 15mm, and is evenly arranged according to 50% of the cathode area, and its major axis is along the vertical direction and the minor axis is along the horizontal direction. Bolt holes with a diameter of 2cm are set around the cathode bottom plate 111 at an interval of 10cm, and the first positioning groove 1421, the second positioning groove 1422, the third positioning groove 1423, and the fourth positioning groove 1424 are machined at the specified positions according to the design.

[0104] (2) Prepare the anode bottom plate 131 as shown in Figure 11

[0105] On a steel plate with dimensions of 5m x 5m x 12.5mm, the anode bottom plate 131 is processed to obtain a first anode current collector post 1351 with a comb shape, a circular second anode current collector post 1352, and a third anode current collector post 1353 with a comb shape as shown in Figure 11

[0106] (3) Prepare the cathode frame 112 as shown in Figure 5

[0107] Bolt holes with an inner diameter of 2cm are drilled around a square steel plate with a thickness of 20mm, an outer dimension of 5m x 5m, and an inner dimension of 4.8m x 4.8m at an interval of 10cm, and are aligned with the bolt holes of the cathode bottom plate 111 and the anode bottom plate 131. At the same time, the first positioning groove 1421, the second positioning groove 1422, the third positioning groove 1423, the fourth positioning groove 1424, and the cathode terminal 117 are machined at the specified positions according to the design. A cathode electrolyte inlet 118 with an inner diameter of 16mm is drilled on the first side, and a cathode gas-liquid outlet 119 with an inner diameter of 16mm is machined at the diagonal position on the other side opposite thereto.

[0108] (4) Prepare the anode frame 132 as shown in Figure 6

[0109] ​​​​On the four sides of a square steel plate with a thickness of 7.5 mm, an outer dimension of 4 m x 4 m, and an inner dimension of 3.8 m x 3.8 m, bolt holes with an inner diameter of 2 cm are drilled at intervals of 10 cm, and they are aligned with the bolt holes of the cathode bottom plate 111 and the anode bottom plate 131. At the same time, the first positioning groove 1421, the second positioning groove 1422, the third positioning groove 1423, the fourth positioning groove 1424, and the anode terminal 137 are machined at the specified positions according to the design. An anode electrolyte inlet 138 with an inner diameter of 6 mm is drilled on the first side, and an anode gas-liquid outlet 139 with an inner diameter of 6 mm is machined at the diagonal position on the other side opposite thereto.

[0110] (5) Prepare the anode body 133 and the cathode body 113

[0111] The cathode body 113 containing the cathode catalyst is prepared by processes such as thermal spraying, coating sintering, electroplating, electroless plating, etc. At the same time, the anode body 133 containing the anode catalyst is prepared.

[0112] (6) Assembly

[0113] The obtained cathode frame 112 and the cathode body 113 are welded together to obtain the cathode unit, and the anode frame 132 and the anode body 133 are welded together to obtain the anode unit. The cathode bottom plate 111, the cathode seal 116, the cathode unit, the diaphragm 120, the anode unit, the anode seal 136, and the anode bottom plate 131 are sequentially stacked and installed and fastened by fastening bolts in the Figure 2 shown manner to obtain the Figure 1 shown single electrolysis unit.

[0114] The electrolysis unit is connected to the electrolyte pipeline, the gas-liquid treatment pipeline, and the power supply in the electrolysis system in the Figure 7 shown manner, enabling the single electrolysis unit to electrolyze water to produce hydrogen and oxygen. Four hundred single electrolysis units are inserted into the preset installation track in the Figure 12 shown "cathode|anode + anode|cathode + …" arrangement method to form an electrolytic water hydrogen production electrolyzer with a power of 50 MW, and the hydrogen production amount is 10,000 m 3 / hour.

[0115] Example 3

[0116] According to Example 1, two hundred single electrolysis units with a size of 4 m x 4 m are arranged in the Figure 8 shown "cathode|anode + cathode|anode + …" arrangement method to obtain an electrolytic water hydrogen production electrolyzer with a power of 15 MW, and it is integrated with components such as electrolyte circulation, gas-liquid treatment, and electrification control into an electrolysis system, and the system hydrogen production amount is 3,000 m 3 / hour.

[0117] The electrolysis system sets a number for each single electrolysis unit, detects the working status of each single electrolysis unit in real time, and provides real-time feedback on its working voltage, current, hydrogen production, oxygen production, oxygen in hydrogen, hydrogen in oxygen, temperature, cathode and anode pressure difference and other data. During operation, the working voltage of each electrolysis unit is 1.8±0.1V, the current is 43320±10A, and the hydrogen production is 15±0.2m 3 / hour, oxygen production is 7.5±0.2m 3 / hour, oxygen in hydrogen is 0.1%±0.05%, hydrogen in oxygen is 0.2±0.05%, temperature is 80±2℃, and the pressure difference between the cathode and cathode is 100±10Pa. After running for a period of time, it was found that the single electrolysis unit numbered N was abnormal, and its hydrogen content in oxygen reached 2.5%, and other parameters were normal. It was judged that there was a cross-gas phenomenon in the electrolysis unit, and it was suspected that the diaphragm 120 was broken and failed. Therefore, the system control cut off the power supply of the electrolysis unit, closed its electrolyte inlet solenoid valve, and closed its cathode gas-liquid outlet 119 and anode gas-liquid outlet 139 after waiting for 1 minute, so that it was isolated from the electrolysis system, and the electrolysis system continued to run.

[0118] Example 4

[0119] On the basis of Example 3, after the present embodiment finds that an individual electrolysis unit has failed and isolates it from the electrolysis system, the electrolysis unit is set to maintenance mode, at which time the three-way valve at the cathode electrolyte inlet 118 will switch to the electrolyte recovery pipeline, the three-way valve at the anode electrolyte inlet 138 will switch to the electrolyte recovery pipeline, and at the same time, the three-way valves at the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139 will switch to the nitrogen pipeline. At this time, the solenoid valves at the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139 are opened, and nitrogen enters the inside of the electrolysis unit from the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139, and the solenoid valves at the cathode electrolyte inlet 118 and the anode electrolyte inlet 138 are opened, and the electrolyte remaining inside the electrolysis unit flows into the electrolyte recovery pipeline along the cathode electrolyte inlet 118 and the anode electrolyte inlet 138, and after the electrolyte in it is completely emptied, all solenoid valves are closed.

[0120] Then, the electrolysis unit is carefully lifted out and transferred to the maintenance area for disassembly and maintenance, and the diaphragm 120 is replaced. After troubleshooting, reassemble, fill the anode and cathode chambers with nitrogen, and then connect to the electrolysis system. First, switch the three-way valves at the cathode electrolyte inlet 118 and the anode electrolyte inlet 138 to the electrolyte circulation pipeline, open the liquid inlet solenoid valve, so that the electrolyte enters the cathode chamber and the anode chamber, and after the electrolyte fills 2 / 3 of the chamber space, open the emptying circuit of the nitrogen pipeline to empty the gas inside through this circuit, and turn on the power at the same time, the anode and cathode begin to produce hydrogen and oxygen, and after the electrolyte completely fills the anode and cathode chambers or continues electrolysis for 10 minutes, control the three-way valves at the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139 to switch to the cathode gas-liquid treatment pipeline and the anode gas-liquid treatment pipeline respectively, open the solenoid valves at the cathode gas-liquid outlet 119 and the anode gas-liquid outlet 139, and the electrolysis unit is reconnected to the electrolysis system.

[0121] Example 5

[0122] In this embodiment, the cathode bottom plate 111 ( Figure 3 ) The first positioning groove 1421 and the second positioning groove 1422 are changed into a stepped type, so as to obtain Figure 13 Another cathode bottom plate 111 is shown. Similarly, for the anode bottom plate 131 ( Figure 4 )、cathode frame 112(5)、anode frame 132( Figure 6 ) is modified in the same way, that is, the first positioning groove 1421 and the second positioning groove 1422 are changed into a stepped type, and then the components are combined to obtain Figure 14 Another unit cell is shown. Figure 14 The electrolysis unit is connected to the electrolyte pipeline, the gas-liquid processing pipeline and the power supply in the electrolysis system, so that the single electrolysis unit can electrolyze water to produce hydrogen and oxygen.

[0123] Further, the electrolysis unit is Figure 15 As shown in the figure, the plug-in installation method is used to Figure 14 The electrolysis units are stacked and combined to obtain a high-power electrolysis set, which is connected to the electrolyte pipeline, gas-liquid processing pipeline and power supply in the electrolysis system in the same manner as in the above-mentioned embodiment, thereby obtaining a high-power electrolysis set.

[0124] 700 Figure 14 Monomer electrolysis unit such as Figure 15 The arrangement of "cathode | anode + cathode | anode +..." is shown as an insertion into the preset installation track, forming a 50MW water electrolysis hydrogen production electrolyzer with a hydrogen production capacity of 10,000m 3 Compared with the above-mentioned embodiment, this embodiment has the advantages of more convenient hoisting and easier maintenance.

[0125] Comparative Example 1

[0126] This comparative example provides a traditional electrolysis set. 300 alkaline electrolysis cells with a diameter of 1.85 meters are combined to form an electrolytic water hydrogen production electrolyzer with a power of 15 MW, and the hydrogen production is 3000 m 3 / hour.

[0127] In summary, the embodiments of the present utility model provide an assembled electrolysis unit 100 and an assembled electrolysis set. The cathode body 113 is installed by using the cathode frame 112, and the anode body 133 is installed by using the anode frame 132. Assembly is carried out through the mounting holes 141 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132, realizing the quick installation of the cathode assembly 110, the diaphragm 120 and the anode assembly 130. The positioning grooves 142 on the cathode bottom plate 111, the cathode frame 112, the anode bottom plate 131 and the anode frame 132 can be used to assemble multiple assembled electrolysis units 100 to form an assembled electrolysis set. It has the following advantages:

[0128] (1) Reduce the requirements for lifting equipment

[0129] The assembled electrolysis unit 100 and the high-power electrolysis set provided by the embodiments of the present utility model optimize the existing integral electrolyzer into an assembled independent structure, breaking the whole into parts, effectively reducing the weight and size of a single electrolyzer. The electrolyzer with an original single weight of 50 tons or even nearly 100 tons is split into multiple electrolysis units with a single weight of only about 100 kg. Therefore, the requirements for lifting equipment are greatly reduced, and the electrolysis units can even be transported without using lifting equipment, which greatly facilitates the installation, transportation, lifting and maintenance of the electrolyzer.

[0130] (2) Improve the maintainability and stability of the electrolyzer

[0131] Due to the adopted assembled design, the power supply, electrolyte and gas production of each electrolysis unit can be independently controlled. Once it is found that a few electrolysis units are faulty, they can be isolated without affecting the operation of the electrolysis system, significantly improving the maintainability and stability of the electrolyzer.

[0132] (3) Greatly reduce the weight of the electrolyzer and lower the cost

[0133] Due to the use of assembled design, the electrolytic cell is transformed into an electrolytic cell, so there is no need to use the bipolar plates and end plates in the traditional electrolytic cell. The weight of a single bipolar plate in a traditional electrolytic cell is about 50 kilograms, and the total weight of 300 bipolar plates is about 15 tons, and the total weight of two end plates can reach 15 tons. Therefore, the weight of the bipolar plates and end plates in the traditional electrolytic cell accounts for up to 60%, which is the main source of its weight. The use of assembled design eliminates the use of end plates and bipolar plates, which can significantly reduce the weight of the electrolytic cell and also has a significant cost reduction effect. The embodiment of the utility model can effectively reduce the problems of large size, bulkiness, high cost, etc. of existing alkaline electrolytic cells, and can greatly promote the development and application of electrolytic water technology.

[0134] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An assembled electrolysis unit, characterized in that, It includes a cathode assembly, a diaphragm, and an anode assembly. The cathode assembly is used to be installed on one side of the diaphragm, and the anode assembly is used to be installed on the other side of the diaphragm; The cathode assembly includes a cathode bottom plate, a cathode frame, and a cathode body. The cathode body includes a conductive medium with the catalytic ability of electrolytic water hydrogen evolution. The cathode frame has a cathode hollow groove to install the cathode body through the cathode hollow groove; the cathode bottom plate has an installation surface assembled with the cathode frame, and a plurality of cathode guide posts are arranged on the installation surface of the cathode bottom plate; The anode assembly includes an anode bottom plate, an anode frame, and an anode body. The anode body includes a conductive medium with the catalytic ability of electrolytic water oxygen evolution. The anode frame has an anode hollow groove to install the anode body through the anode hollow groove; the anode bottom plate has an installation surface assembled with the anode frame, and a plurality of anode guide posts are arranged on the installation surface of the anode bottom plate; Position-corresponding installation holes are provided on the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame to assemble the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame through the installation holes; Positioning grooves are provided on the cathode bottom plate, the cathode frame, the anode bottom plate, and the anode frame to assemble a plurality of the assembled electrolysis units through the positioning grooves.

2. The prefabricated electrolysis unit according to claim 1, characterized in that, The cathode guide posts on the cathode bottom plate include a plurality of first cathode guide posts, a plurality of second cathode guide posts, and a plurality of third cathode guide posts. The first cathode guide posts are all distributed in the first cathode guide area, the second cathode guide posts are all distributed in the second cathode guide area, the third cathode guide posts are all distributed in the third cathode guide area. The first cathode guide area and the third cathode guide area are located on both sides of the second cathode guide area; the second cathode guide area accounts for 40%-60% of the area of the cathode bottom plate; And / or, the anode guide posts on the anode bottom plate include a plurality of first anode guide posts, a plurality of second anode guide posts, and a plurality of third anode guide posts. The first anode guide posts are all distributed in the first anode guide area, the second anode guide posts are all distributed in the second anode guide area, the third anode guide posts are all distributed in the third anode guide area. The first anode guide area and the third anode guide area are located on both sides of the second anode guide area; The second anode guide area accounts for 40%-60% of the area of the anode bottom plate.

3. The prefabricated electrolysis unit according to claim 2, characterized in that, The ratio of the height of the cathode guide post to the height of the anode guide post is (1.5-2.5):1; And / or, the projection of the second cathode guide post on the cathode bottom plate is oval or drop-shaped, and the projection of the second anode guide post on the anode bottom plate is oval or drop-shaped; And / or, the shapes of the first cathode guide post, the third cathode guide post, the first anode guide post, and the third anode guide post are all selected from at least one of comb-shaped, tooth-shaped, grid-shaped, mesh-shaped, and dot matrix-shaped; And / or, the assembled electrolysis unit is rectangular with side lengths of 0.5 m - 5 m, the distance between adjacent cathode current-conducting posts is 0.5 cm - 5 cm, and the distance between adjacent anode current-conducting posts is 0.5 cm - 5 cm.

4. The prefabricated electrolysis unit according to claim 1, wherein The positioning grooves on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame are all located at the edges, and there are more than two positioning grooves. The positioning grooves on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame are in corresponding positions. And / or, it further includes a cathode seal and an anode seal. The cathode seal is located between the cathode bottom plate and the cathode cell frame, and the anode seal is located between the anode bottom plate and the anode cell frame.

5. The prefabricated electrolysis unit according to claim 4, characterized in that The cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame all have a first positioning side, a second positioning side opposite to the first positioning side, and a third positioning side located between the first positioning side and the second positioning side. A first positioning groove is provided on the first positioning side, a second positioning groove is provided on the second positioning side, and a third positioning groove and a fourth positioning groove are provided on the third positioning side. And / or, a cathode connection post is provided on the cathode cell frame, and an anode connection post is provided on the anode cell frame. In the working state, the cathode connection post is connected to the negative pole of the power supply through a cathode wire, and the anode connection post is connected to the positive pole of the power supply through an anode wire.

6. The prefabricated electrolysis unit according to claim 5, wherein It further includes a first support rail, a second support rail, a third support rail, and a fourth support rail. The first positioning grooves on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame cooperate with the first support rail, the second positioning grooves cooperate with the second support rail, the third positioning grooves cooperate with the third support rail, and the fourth positioning grooves cooperate with the fourth support rail.

7. The prefabricated electrolysis unit according to any one of claims 1-6, characterized in that, A cathode electrolyte inlet and a cathode gas-liquid outlet opposite to the cathode electrolyte inlet are provided on the cathode cell frame. An anode electrolyte inlet and an anode gas-liquid outlet opposite to the anode electrolyte inlet are provided on the anode cell frame.

8. The prefabricated electrolysis unit according to claim 7, characterized in that, It further includes a connecting piece. There are multiple installation holes, and all the multiple installation holes are located around the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame. The connecting piece passes through the installation holes on the cathode bottom plate, the cathode cell frame, the anode bottom plate, and the anode cell frame to realize the assembly of the electrolysis unit. And / or, the cathode electrolyte inlet and the anode electrolyte inlet are respectively located on both sides of the electrolysis unit, and the cathode gas-liquid outlet and the anode gas-liquid outlet are respectively located on both sides of the electrolysis unit.

9. The prefabricated electrolysis unit according to claim 7, wherein, The cathode electrolyte inlet is connected to a cathode electrolyte input pipeline and an electrolyte recovery pipeline through a three-way valve. The cathode electrolyte input pipeline is connected to an electrolyte circulation pump or an alkali tank. The cathode gas-liquid outlet is connected to a cathode gas-liquid output pipeline and an inert gas pipeline through a three-way valve. The cathode gas-liquid output pipeline is connected to a cathode gas-liquid treatment component. And / or, the anolyte inlet is connected to the anolyte input pipeline and the electrolyte recovery pipeline through a three-way valve. The anolyte input pipeline is connected to an electrolyte circulation pump or an alkali solution tank. The anodic gas-liquid outlet is connected to the anodic gas-liquid output pipeline and an inert gas pipeline through a three-way valve. The anodic gas-liquid output pipeline is connected to an anodic gas-liquid treatment component.

10. An assembled electrolytic cell, characterized in that, It includes an electrolytic stack, and the electrolytic stack is formed by cumulatively combining a plurality of the assembled electrolytic units described in any one of claims 1-9.

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