Hydrogen production electrolytic cell

Abstract

The utility model provides a hydrogen production electrolytic cell. The hydrogen production electrolytic cell comprises an outer shell, an inner combined shell and an electrolysis unit, the outer shell is provided with a mounting opening and a second generating cavity, and the mounting opening is communicated with the second generating cavity; the electrolysis unit comprises a first electrode, a diaphragm and a second electrode; a first generating cavity is formed in the inner combined shell, the first electrode is installed in the inner combined shell, at least part of the first electrode is exposed in the first generating cavity, and the diaphragm is arranged on the face, back on to the first generating cavity, of the first electrode; the inner combined shell is connected with the outer shell through the mounting port, so that the first electrode and the diaphragm are at least partially arranged in the second generating cavity, and the diaphragm divides the first generating cavity and the second generating cavity into mutually independent spaces; a second electrode is arranged on one surface, back to the first electrode, of the diaphragm, and the second electrode is exposed in the second generation cavity.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen production, in particular to electrolytic hydrogen production technology. Background Art

[0002] The electrolytic water hydrogen production technology uses electric energy to decompose water to produce hydrogen, which has the advantages of low pollution and high hydrogen purity, and is one of the current research hotspots in the field of electrochemical energy. However, the existing electrolytic water hydrogen production devices have problems such as large structural size, complex hydrogen-oxygen flow channels, and high maintenance costs. Summary of the Utility Model

[0003] Based on the above-mentioned problems, the present application aims to propose an electrolytic cell for hydrogen production.

[0004] A hydrogen production electrolytic cell includes an outer shell, an inner combined shell, and an electrolysis unit;

[0005] The outer shell has an installation port and a second reaction chamber, and the installation port is communicated with the second reaction chamber;

[0006] The electrolysis unit includes a first electrode, a diaphragm, and a second electrode;

[0007] The inner combined shell forms a first reaction chamber, the first electrode is installed on the inner combined shell, at least part of the first electrode is exposed to the first reaction chamber, and the diaphragm is arranged on the side of the first electrode facing away from the first reaction chamber;

[0008] The inner combined shell is connected to the outer shell through the installation port, so that at least part of the first electrode and the diaphragm are arranged in the second reaction chamber, and the diaphragm divides the first reaction chamber and the second reaction chamber into mutually independent spaces;

[0009] The second electrode is arranged on the side of the diaphragm facing away from the first electrode, and the second electrode is exposed to the second reaction chamber.

[0010] In one embodiment, the second electrode is installed on the inner combined shell and is separated from the first electrode by the diaphragm.

[0011] In one embodiment, the second reaction chamber is formed with an installation part, the second electrode is installed on the installation part, and the inner combined shell is arranged on the side of the installation part through the installation port.

[0012] In one embodiment, an outer combined shell is further included, the second electrode is installed on the outer combined shell, and the outer combined shell body is connected to the inner combined shell to form a combined shell, so that the outer combined shell is arranged on the side of the inner combined shell.

[0013] In one embodiment, the combined shell is connected to the outer shell through the mounting opening, and the combined shell is detachably connected to the outer shell.

[0014] In one embodiment, the outer combined shell is detachably connected to the inner combined shell.

[0015] In one embodiment, the number of the mounting openings is multiple, the number of the electrolysis units is multiple, and one electrolysis unit is installed on one mounting opening.

[0016] In one embodiment, a first inlet pipe, a second inlet pipe, a first outlet pipe, and a second outlet pipe are further included. The first inlet pipe and the first outlet pipe are communicated with the first reaction chamber, and the second inlet pipe and the second outlet pipe are communicated with the second reaction chamber.

[0017] In one embodiment, a gas-liquid separation component is connected to both the first outlet pipe and the second outlet pipe.

[0018] In one embodiment, a drying component is connected to both the first outlet pipe and the second outlet pipe, and the drying component is connected to the gas-liquid separation component.

[0019] In one embodiment, a water circulation pump is further included. The first end of the water circulation pump is connected to the gas-liquid separation component, and the second end of the water circulation pump is communicated with the second reaction chamber or the first reaction chamber.

[0020] In one embodiment, the first electrode and the second electrode are single flat electrodes or ring electrodes.

[0021] The beneficial effects of the present application are as follows:

[0022] The hydrogen-oxygen shunt structure of the hydrogen production electrolytic cell of the present application is simple, eliminating the complex hydrogen-oxygen flow channel structure of the existing hydrogen production cell. The supporting components are easier to prepare and install, and can be conveniently assembled in batches, eliminating the complex structure in the existing system, making the size of the hydrogen production equipment smaller. The detachable structure makes the construction and maintenance costs of the hydrogen production electrolytic cell lower and the service life longer.

[0023] The hydrogen production electrolytic cell can efficiently and conveniently assemble multiple electrolysis units, select the number of installed electrolysis units, and seal the unused remaining mounting positions with a sealing cover to efficiently and conveniently control the hydrogen production of the equipment. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a hydrogen production electrolytic cell according to an embodiment of the present application.

[0026] Figure 2 It is another schematic structural diagram of a hydrogen production electrolytic cell according to an embodiment of the present application.

[0027] Figure 3 It is a schematic structural diagram of a hydrogen production electrolytic cell according to another embodiment of the present application.

[0028] Figure 4 It is a schematic structural diagram of a hydrogen production electrolytic cell according to yet another embodiment of the present application. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] As Figure 1 and Figure 2 shown, its structure includes a hydrogen production electrolytic cell according to an embodiment of the present application. Specifically, it includes an outer shell 11, an inner combined shell 12, and an electrolysis unit 10.

[0031] The outer shell 11 has an installation port 15 and a second reaction chamber 4, and the installation port 15 is communicated with the second reaction chamber 4.

[0032] The electrolysis unit 10 includes a first electrode 1, a diaphragm 2, and a second electrode 3.

[0033] The inner combined shell 12 forms a first reaction chamber 5. The first electrode 1 is installed in the inner combined shell 12, at least part of the first electrode 1 is exposed to the first reaction chamber 5, and the diaphragm 2 is arranged on the side of the first electrode 1 facing away from the first reaction chamber 5.

[0034] The inner combined shell 12 is connected to the outer shell 11 through the mounting opening 15, such that the first electrode 1 and the diaphragm 2 are at least partially disposed within the second reaction chamber 4, and the diaphragm 2 divides the first reaction chamber 5 and the second reaction chamber 4 into mutually independent spaces.

[0035] A second electrode 3 is disposed on a side of the diaphragm 2 facing away from the first electrode 1, and the second electrode 3 is exposed to the second reaction chamber 4.

[0036] In this embodiment, the first electrode 1 and the diaphragm 2 are mounted on the inner combined shell 12. The inner combined shell 12 and the outer shell 11 are assembled together, such that the first electrode 1 and the diaphragm 2 are disposed within the outer shell 11 (i.e., the second reaction chamber 4). A second electrode 3 is disposed on a side of the diaphragm 2 facing away from the first electrode 1. That is to say, the first electrode 1 is exposed to the second reaction chamber 4, the second electrode 3 is exposed to the second reaction chamber 4, and the diaphragm 2 within the inner combined shell 12 divides the first reaction chamber 5 and the second reaction chamber 4 into independent spaces. This structure enables the inner combined shell 12 to be conveniently assembled and disassembled with the outer shell 11. Since the first reaction chamber 5 is independently formed within the inner combined shell 12 and the second reaction chamber 4 is formed within the outer shell 11, the inner combined shell 12 is inserted into the second reaction chamber 4 through the mounting opening 15 (to seal the second reaction chamber 4). That is to say, the first reaction chamber 5 and the second reaction chamber 4 are respectively formed on two housing structures and can form an integral structure through assembly, thereby forming a detachable hydrogen production electrolytic cell. In this structure, the provision of the inner combined shell 12 simplifies the installation, maintenance, and replacement of the first electrode 1 and the diaphragm 2, reduces the maintenance cost, and furthermore, simplifies the hydrogen-oxygen separation structure. The space between the diaphragm 2 and the inner combined shell 12 is the first reaction chamber 5, and the space between the diaphragm 2 and the outer shell 11 is the second chamber. Compared with the complex hydrogen-oxygen flow channel structure of the existing hydrogen production cell, it is simpler and easier to manufacture and install.

[0037] In one embodiment, the first electrode 1 and the second electrode 3 are single flat electrodes or ring electrodes. That is to say, for example, as Figure 3 shown, the first electrode 1, the diaphragm 2, and the second electrode 3 are in a plate-like, wavy, serrated, or other irregular plate-like structure. Also, for example, as Figure 4 shown, the first electrode 1, the diaphragm 2, and the second electrode 3 are in a circular ring, square, or other irregular ring structure. In the ring structure, the inner combined shell 12 is in a cylindrical shape. The first electrode 1 is disposed outside the diaphragm 2, the first reaction chamber 5 is inside the diaphragm 2, the second electrode 3 is disposed outside the diaphragm 2, and the space between the diaphragm 2 and the outer shell 11 is the second reaction chamber 4.

[0038] To install the second electrode 3, in one embodiment, the second electrode 3 is installed on the inner combined housing 12 and separated from the first electrode 1 by the diaphragm 2. Specifically, the first electrode 1, the diaphragm 2, and the second electrode 3 are sequentially installed on the inner combined housing 12. The inner combined housing 12 forms a first reaction chamber 5. At least a part of the surface of the first electrode 1 is exposed to the first reaction chamber 5, and an electrolysis reaction occurs in the first reaction chamber 5. The second electrode 3 is disposed on the side of the diaphragm 2 facing away from the first electrode 1, and the diaphragm 2 separates the first electrode 1 and the second electrode 3, so that the second electrode 3 is not disposed in the first reaction chamber 5. By placing the inner combined housing 12 into the second reaction chamber 4 through the installation opening 15, the second electrode 3 not disposed in the first reaction chamber 5 is exposed to the second reaction chamber 4, and an electrolysis reaction occurs in the second reaction chamber 4.

[0039] To install the second electrode 3, in one embodiment, the hydrogen production electrolytic cell further includes an outer combined housing (not shown). The second electrode 3 is installed on the outer combined housing. The outer combined housing is connected to the inner combined housing 12 to form a combined housing, such that the outer combined housing is disposed on the side of the inner combined housing 12. Specifically, the first electrode 1 and the diaphragm 2 are sequentially installed on the inner combined housing 12, and the second electrode 3 is installed on the outer combined housing. The inner combined housing 12 and the outer combined housing are arranged such that the second electrode 3 is disposed on the side of the diaphragm 2 facing away from the first electrode 1. The diaphragm 2 separates the first electrode 1 and the second electrode 3. The inner combined housing 12 forms a first reaction chamber 5. At least a part of the surface of the first electrode 1 is exposed to the first reaction chamber 5, and the second electrode 3 is not disposed in the first reaction chamber 5. By combining the inner combined housing 12 and the outer housing 11, a combined housing is formed. Further, for example, the combined housing is connected to the outer housing 11 through the installation opening 15, and the combined housing is detachably connected to the outer housing 11. By connecting the combined housing to the outer housing 11, the second electrode 3 is exposed to the second reaction chamber 4. In a preferred embodiment, the outer combined housing is detachably connected to the inner combined housing 12. With this structure, the first electrode 1 and the second electrode 3 are designed in a split manner, making the installation, maintenance, and replacement of the electrode components easier.

[0040] In order to install the second electrode 3, in one embodiment, the second reaction chamber 4 is formed with a mounting portion (not shown), the second electrode 3 is mounted on the mounting portion, and the inner combined housing 12 is disposed on the side of the mounting portion through the mounting opening 15. Specifically, the first electrode 1 and the diaphragm 2 are sequentially mounted on the inner combined housing 12, the outer body has a mounting portion for mounting the second electrode 3, the inner combined housing 12 forms a first reaction chamber 5, and at least a part of the surface of the first electrode 1 is exposed to the first reaction chamber 5. By disposing the inner combined housing 12 into the second reaction chamber 4 through the mounting opening 15, the mounting portion is disposed on the side of the mounting portion, that is, the second electrode 3 is disposed on the side of the diaphragm 2 facing away from the first electrode 1, and the second electrode 3 is disposed in the second reaction chamber 4. Among them, for example, the mounting portion is detachably disposed in the outer housing 11, so that disassembly and maintenance can be conveniently performed.

[0041] In order to improve the hydrogen production capacity, generally, a plurality of stacked electrolysis units 10 are included in a hydrogen production electrolytic cell. By stacking the electrolysis units 10, the hydrogen production can be increased. In one embodiment, the number of the mounting openings 15 is multiple, the number of the electrolysis units 10 is multiple, and one electrolysis unit 10 is mounted on one mounting opening 15. And it can be understood that since the diaphragm 2 separates the first reaction chamber 5 and the second reaction chamber 4, and the diaphragm 2 is disposed on the inner housing, each electrolysis unit 10 is disposed in the second reaction chamber 4, so that the reaction chamber (the second reaction chamber 4) of the second electrode 3 of each electrolysis unit 10 is the same. That is to say, there is one and only one second reaction chamber 4 as the reaction chamber of the second electrode 3 in each electrolysis unit 10, and the reaction chamber of the first electrode 1 of each electrolysis unit 10 is several first reaction chambers respectively formed by each inner combined housing 12. In this structure, the structural design of hydrogen-oxygen shunt becomes simple, avoiding the complex flow channel structure in the existing design. And this structure makes the multiple stacked assembly of the electrolysis units 10 efficient and convenient. The number of the electrolysis units 10 that can be selectively assembled can be selected, and the remaining unused mounting positions are sealed with a sealing cover to seal the mounting opening 15, realizing efficient and convenient assembly, disassembly of the electrolysis units 10 and hydrogen production regulation.

[0042] Further, for example, the hydrogen production electrolytic cell further includes a first inlet pipe 6, a second inlet pipe 8, a first outlet pipe 7, and a second outlet pipe 9. The first inlet pipe 6 and the first outlet pipe 7 are connected to the first reaction chamber 5, and the second inlet pipe 8 and the second outlet pipe 9 are connected to the second reaction chamber 4. In this embodiment, the first inlet pipe 6 and the first outlet pipe 7 are connected to the first reaction chamber 5 of each inner combined shell 12. Water enters the first reaction chamber 5 from the first inlet pipe 6, and after the electrolysis reaction, the gas / water vapor mixture converges and is discharged from the first outlet pipe 7. The second inlet pipe 8 and the second outlet pipe 9 are connected to the second reaction chamber 4, and after the electrolysis reaction, the gas / water vapor mixture converges and is discharged from the second outlet pipe 9. The hydrogen-oxygen separation structure of this embodiment is simple and more optimized than the complex flow channel structure of the existing hydrogen production electrolytic cell.

[0043] It should be understood that, for example, in order to ensure the sealing performance, a sealing ring is provided between the inner combined shell 12 and the outer shell 11. Also, for example, a sealing ring is provided between the combined shell and the outer shell 11 to ensure the sealing performance of the second cavity after assembly.

[0044] For example, a sealing ring is provided between the outer combined shell and the inner combined shell 12 to ensure the sealing performance after the assembly of the outer combined shell and the inner combined shell 12.

[0045] In one embodiment, a gas-liquid separation assembly 22 is connected to both the first outlet pipe 7 and the second outlet pipe 9. The generated hydrogen / oxygen products are discharged through the first outlet pipe 7 and the second outlet pipe 9 and enter the gas-liquid separation assembly 22, where the water vapor mixture can be separated into water and gas, thereby obtaining the required hydrogen / oxygen gas.

[0046] In one embodiment, a drying assembly 23 is connected to both the first outlet pipe 7 and the second outlet pipe 9. The drying assembly 23 is connected to the gas-liquid separation assembly 22. The hydrogen / oxygen gas separated by the gas-liquid separation assembly 22 is dried by the drying assembly 23 to remove the moisture in the gas and obtain the required dried hydrogen / oxygen gas.

[0047] In one embodiment, a water circulation pump 21 is further included. The first end of the water circulation pump 21 is connected to the gas-liquid separation assembly 22, and the second end of the water circulation pump 21 is connected to the second reaction chamber 4 or the first reaction chamber 5. The water separated by the gas-liquid separation assembly 22 is guided back to the second reaction chamber 4 or the first reaction chamber 5 through the water circulation pump 21 for reaction, improving the utilization rate of water and saving energy.

[0048] It should be understood that a first wastewater discharge pipe 41 and a second wastewater discharge pipe 31 are further included. The first wastewater discharge pipe 41 is connected to the first reaction chamber 5, and the second wastewater discharge pipe 31 is connected to the second reaction chamber 4. The wastewater discharge pipes are used to discharge the generated wastewater.

[0049] It should be understood that the first electrode 1 and the second electrode 3 are externally connected to a power source. The first electrode 1 is electrically connected to the positive or negative pole of the power source, the second electrode 3 is electrically connected to the negative or positive pole of the power source, and the polarities of the first electrode 1 and the second electrode 3 are opposite, so that an electrolysis reaction occurs to produce hydrogen / oxygen.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0051] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A hydrogen production electrolyzer, characterized in that: It includes an outer shell, an inner combined shell and an electrolysis unit; The outer shell has a mounting port and a second generating chamber, and the mounting port is communicated with the second generating chamber; The electrolytic cell comprises a first electrode, a diaphragm, and a second electrode; The inner combined shell forms a first generating chamber, the first electrode is installed in the inner combined shell, the first electrode is at least partially exposed to the first generating chamber, and the diaphragm is disposed on a side of the first electrode facing away from the first generating chamber; The inner combined shell is connected to the outer shell through the mounting opening, so that the first electrode and the diaphragm are at least partially disposed in the second generating chamber, and the diaphragm divides the first generating chamber and the second generating chamber into mutually independent spaces; A second electrode is disposed on a side of the diaphragm facing away from the first electrode, and the second electrode is exposed to the second generating chamber.

2. The hydrogen production electrolyzer according to claim 1, characterized in that: The second electrode is mounted on the inner combined shell and is separated from the first electrode by the diaphragm.

3. The hydrogen production electrolyzer according to claim 1, characterized in that: The second generating chamber is formed with a mounting portion, the second electrode is mounted on the mounting portion, and the inner combined shell is disposed on a side surface of the mounting portion through the mounting opening.

4. The hydrogen production electrolyzer according to claim 1, characterized in that: It also includes an outer combined shell, the second electrode is installed on the outer combined shell, and the outer combined shell is connected with the inner combined shell to form a combined shell, so that the outer combined shell is arranged on the side of the inner combined shell.

5. The hydrogen production electrolyzer according to claim 4, characterized in that: The combined shell is connected to the outer shell through the installation opening, and the combined shell is detachably connected to the outer shell.

6. The hydrogen production electrolyzer according to claim 4, characterized in that: The outer combined shell body is detachably connected to the inner combined shell body.

7. The hydrogen production electrolyzer according to claim 1, characterized in that: There are multiple installation ports, multiple electrolysis units, and one electrolysis unit is installed on one installation port.

8. The hydrogen production electrolyzer according to claim 1, characterized in that: It also includes a first inlet pipe, a second inlet pipe, a first outlet pipe and a second outlet pipe. The first inlet pipe and the first outlet pipe are connected to the first generating chamber, and the second inlet pipe and the second outlet pipe are connected to the second generating chamber.

9. The hydrogen production electrolyzer according to claim 8, characterized in that: The first outlet pipe and the second outlet pipe are both connected with a gas-liquid separation component.

10. The hydrogen production electrolyzer according to claim 9, characterized in that: The first outlet pipe and the second outlet pipe are both connected with a drying component, and the drying component is connected to the gas-liquid separation component.

11. The hydrogen production electrolyzer according to claim 9, characterized in that: It also includes a water circulation pump, a first end of which is connected to the gas-liquid separation component, and a second end of which is connected to the second generating chamber or the first generating chamber.

12. The hydrogen production electrolyzer according to claim 1, characterized in that: The first electrode and the second electrode are single plate electrodes or ring electrodes.

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