Discrete circulating water electrolysis hydrogen production equipment with corrosion resistance and high current efficiency

Abstract

The utility model discloses a corrosion-resistant high-current-efficiency discrete circulating water electrolysis hydrogen production device, which belongs to the technical field of water electrolysis hydrogen production and comprises an electrolytic bath and a hydrogen separator mounted on a hydrogen discharge port of the electrolytic bath. The oxygen separator is mounted on an oxygen discharge interface of the electrolytic cell, a gas output port of the hydrogen separator is connected with a hydrogen comprehensive tower through a pipeline, a hydrogen output pipe is fixedly mounted at an output port of the hydrogen comprehensive tower, and a liquid output port of the hydrogen separator is fixedly connected with a hydrogen-containing return pipe; one end of the hydrogen-containing return pipe is connected with a hydrogen side pump, and an output port of the hydrogen side pump is connected with a hydrogen side filter through a pipeline. According to the invention, current flowing to bypass electrolyte can be greatly reduced, bypass current is reduced, current efficiency is effectively improved, electrochemical corrosion is reduced, the service life of an electrolytic bath is prolonged, energy consumption is greatly reduced, and the operation cost of a product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, and more specifically to a corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment. Background Art

[0002] Hydrogen electrolysis is a process that uses electrical energy to decompose water molecules to produce pure hydrogen and oxygen gas. This method of decomposing water is also called water electrolysis because in this process, water is decomposed into hydrogen and oxygen through electrolysis. The efficiency of hydrogen electrolysis refers to the ability to produce hydrogen using electrical energy and is often used to measure the efficiency of hydrogen electrolysis. Hydrogen electrolysis technology has been widely used in energy conversion and storage. Since hydrogen is a clean, zero-carbon emission energy carrier, using solar energy, wind energy or other renewable energy sources to further improve the efficiency of hydrogen electrolysis has also become a hot research area.

[0003] Current efficiency refers to the percentage of current actually used to produce hydrogen to the total input current. Generally speaking, the higher the current efficiency should be, the higher the efficiency of hydrogen production by electrolysis.

[0004] At present, in the actual use of electrolytic hydrogen production, due to the corresponding alkaline solution produced in the electrolytic cell, when the alkaline solution flows, it will cause certain chemical corrosion and reduce the current efficiency, while reducing the use effect of the electrolytic cell and increasing the operating cost of electrolytic hydrogen production.

[0005] Therefore, in view of this, the existing structure is studied and improved to provide a corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment, in order to achieve a more practical purpose. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] In view of the problems existing in the prior art, the purpose of the utility model is to provide a corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment, which can significantly reduce the current flowing to the bypass electrolyte, reduce the bypass current, effectively improve the current efficiency, reduce electrochemical corrosion, increase the life of the electrolytic cell, and significantly reduce energy consumption, thereby reducing the operating cost of the product.

[0008] 2. Technical solution

[0009] To solve the above problems, the utility model adopts the following technical solutions.

[0010] A corrosion-resistant, high-current-efficiency, discrete circulating water electrolysis hydrogen production equipment comprises an electrolyzer, a hydrogen separator installed on a hydrogen gas discharge interface of the electrolyzer, and an oxygen separator installed on an oxygen gas discharge interface of the electrolyzer.

[0011] The gas output port of the hydrogen separator is connected to a hydrogen integrated tower through a pipeline, a hydrogen output pipe is fixedly installed at the output port of the hydrogen integrated tower, a hydrogen-containing reflux pipe is fixedly connected to the liquid output port of the hydrogen separator, one end of the hydrogen-containing reflux pipe is connected to a hydrogen side pump, the output port of the hydrogen side pump is connected to a hydrogen side filter through a pipeline, the output port of the hydrogen side filter is connected to a hydrogen side cooler through a pipeline, a hydrogen side liquid return port is fixedly provided on one side of the electrolyzer, and the output port of the hydrogen side cooler is connected to the hydrogen side liquid return port through a pipeline;

[0012] The gas output port of the oxygen separator is connected to an aerobic integrated tower through a pipeline, an oxygen output pipe is fixedly installed at the output port of the oxygen integrated tower, an oxygen-containing reflux pipe is fixedly connected to the liquid output port of the oxygen separator, one end of the oxygen-containing reflux pipe is connected to an aerobic side pump, the output port of the oxygen side pump is connected to an aerobic side filter through a pipeline, the output port of the oxygen side filter is connected to an aerobic side cooler through a pipeline, an aerobic side liquid return port is fixedly arranged on the other side of the electrolytic cell, and the output port of the oxygen side cooler is connected to the oxygen side liquid return port through a pipeline;

[0013] A migration tube is arranged between the hydrogen separator and the oxygen separator, and the hydrogen separator and the oxygen separator are connected through the migration tube.

[0014] Furthermore, the hydrogen-side liquid return port and the oxygen-side liquid return port are both provided with a bushing structure.

[0015] Furthermore, the electrolytic cell includes an end pressure plate, a diaphragm gasket, an electrode grid electrode plate, and an intermediate electrode plate arranged in the middle position.

[0016] Furthermore, the middle of the intermediate plate is divided into a hydrogen side chamber and an oxygen side chamber by a partition plate, and a hydrogen output hole and a hydrogen side liquid hole communicating with the hydrogen side chamber are provided on the frame of the intermediate plate;

[0017] The hydrogen output hole and the hydrogen side liquid hole are both provided with a bushing structure.

[0018] Furthermore, an oxygen output hole and an oxygen side liquid hole communicating with the oxygen side chamber are provided on the frame of the intermediate plate;

[0019] The oxygen output hole and the oxygen side liquid hole are both provided with a bushing structure.

[0020] Furthermore, a hydrogen-containing electrolyte cavity with a flat cavity structure is provided on one side of the upper end of the intermediate electrode plate, and a hydrogen-side liquid return hole interconnected with the hydrogen-containing electrolyte cavity is provided on the frame of the intermediate electrode plate;

[0021] The hydrogen side liquid return hole is provided with a bushing structure.

[0022] Furthermore, an oxygen-containing electrolyte cavity with a flat cavity structure is provided on the frame of the intermediate electrode plate, and an oxygen-side liquid return hole interconnected with the oxygen-containing electrolyte cavity is provided on the frame of the intermediate electrode plate;

[0023] The oxygen side liquid return hole is provided with a bushing structure.

[0024] Furthermore, the diaphragm gasket is a thin sheet structure, and the hydrogen output hole, hydrogen side liquid hole, oxygen output hole, oxygen side liquid hole, hydrogen side liquid return hole and oxygen side liquid return hole are all distributed on the diaphragm gasket.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] ① This scheme, the utility model adds a bushing structure to the alkali solution inflow channel and the alkali solution outflow channel in the discrete circulation hydrolysis process, and the alkali solution in the oxygen electrolyte circulation channel and the alkali solution in the hydrogen electrolyte circulation channel are respectively isolated from the electrolytic cell body by alkali-resistant and high-temperature resistant insulating bushings and alkali-resistant and high-temperature resistant insulating adhesives, thereby greatly reducing the current flowing to the bypass electrolyte, reducing the bypass current, effectively improving the current efficiency, and reducing electrochemical corrosion;

[0028] ② This scheme, the utility model adds a bushing structure to the alkali solution inflow channel and the alkali solution outflow channel in the discrete circulation hydrolysis process, and the alkali solution in the oxygen electrolyte circulation channel and the alkali solution in the hydrogen electrolyte circulation channel are respectively isolated from the electrolytic cell body by alkali-resistant and high-temperature resistant insulating bushings and alkali-resistant and high-temperature resistant insulating adhesives, so that the circulating alkali solution and the hydrogen and oxygen generated by electrolysis reduce their erosion of the flow channel, thereby improving the life of the electrolytic cell, and the overhaul cycle of the electrolytic cell is maintained for more than ten years;

[0029] ③ This solution, in this corrosion-resistant high current efficiency discrete circulating water electrolysis hydrogen production equipment, due to the reduction of bypass current loss, the current efficiency of traditional hydrogen production equipment is increased from 85% to 95%, which greatly reduces energy consumption and reduces the operating cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a process flow chart of the utility model;

[0031] Figure 2 It is a schematic diagram of the alkali solution channel of the electrolytic cell of the utility model;

[0032] Figure 3 It is a side view of the pole frame of the electrolytic cell of the utility model.

[0033] Description of the numbers in the figure:

[0034] 1. Electrolyzer; 2. Hydrogen separator; 3. Hydrogen integrated tower; 4. Oxygen separator; 5. Oxygen integrated tower; 6. Hydrogen side pump; 7. Hydrogen side filter; 8. Hydrogen side cooler; 9. Oxygen side pump; 10. Oxygen side filter; 11. Oxygen side cooler; 12. Hydrogen output pipe; 13. Oxygen output pipe; 14. Hydrogen-containing reflux pipe; 15. Hydrogen side liquid return port; 16. Oxygen-containing reflux pipe; 17. Oxygen side liquid return port ; 18. Migration tube; 19. End pressure plate; 20. Diaphragm gasket; 21. Electrode grid electrode plate; 22. Intermediate electrode plate; 23. Separator plate; 24. Hydrogen side chamber; 25. Oxygen side chamber; 26. Hydrogen output hole; 27. Hydrogen side liquid hole; 28. Oxygen output hole; 29. ​​Oxygen side liquid hole; 30. Hydrogen-containing electrolyte chamber; 31. Hydrogen side liquid return hole; 32. Oxygen-containing electrolyte chamber; 33. Oxygen side liquid return hole. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0036] Example:

[0037] See also Figure 1-3 , a corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment, comprising an electrolyzer 1, a hydrogen separator 2 installed on the hydrogen discharge interface of the electrolyzer 1, and an oxygen separator 4 installed on the oxygen discharge interface of the electrolyzer 1, at which hydrogen and oxygen separation is completed by electrolysis;

[0038] The gas output port of the hydrogen separator 2 is connected to the hydrogen integrated tower 3 through a pipeline, and a hydrogen output pipe 12 is fixedly installed at the output port of the hydrogen integrated tower 3. A hydrogen-containing reflux pipe 14 is fixedly connected to the liquid output port of the hydrogen separator 2, and one end of the hydrogen-containing reflux pipe 14 is connected to a hydrogen side pump 6, and the output port of the hydrogen side pump 6 is connected to a hydrogen side filter 7 through a pipeline, and the output port of the hydrogen side filter 7 is connected to a hydrogen side cooler 8 through a pipeline. A hydrogen side liquid return port 15 is fixedly provided on one side of the electrolyzer 1, and the output port of the hydrogen side cooler 8 is connected to the hydrogen side liquid return port 15 through a pipeline. Hydrogen is discharged from the hydrogen output pipe 12, and the remaining liquid passes through the hydrogen separator 2, the hydrogen integrated tower 3, the hydrogen-containing reflux pipe 14, the hydrogen side pump 6, the hydrogen side filter 7 and the hydrogen side cooler 8 in sequence, and finally flows back to the electrolyzer 1 at the hydrogen side liquid return port 15 to complete the circulation of the hydrogen-containing liquid;

[0039] The gas output port of the oxygen separator 4 is connected to the aerobic integrated tower 5 through a pipeline, and an oxygen output pipe 13 is fixedly installed at the output port of the oxygen integrated tower 5. The liquid output port of the oxygen separator 4 is fixedly connected to an oxygen-containing reflux pipe 16, one end of the oxygen-containing reflux pipe 16 is connected to an aerobic side pump 9, and the output port of the oxygen side pump 9 is connected to an aerobic side filter 10 through a pipeline, and the output port of the oxygen side filter 10 is connected to an aerobic side cooler 11 through a pipeline. An oxygen side liquid return port 17 is fixedly arranged on the other side of the electrolyzer 1, and the output port of the oxygen side cooler 11 is connected to the oxygen side liquid return port 17 through a pipeline. Oxygen is discharged from the oxygen output pipe 13, and the remaining liquid passes through the oxygen separator 4, the oxygen integrated tower 5, the oxygen-containing reflux pipe 16, the oxygen side pump 9, the oxygen side filter 10 and the oxygen side cooler 11 in sequence, and finally flows back to the electrolyzer 1 at the oxygen side liquid return port 17 to complete the circulation of the hydrogen-containing liquid;

[0040] A migration pipe 18 is provided between the hydrogen separator 2 and the oxygen separator 4 , and the hydrogen separator 2 and the oxygen separator 4 are connected via the migration pipe 18 .

[0041] See also Figure 1 Specifically, the hydrogen-side liquid return port 15 and the oxygen-side liquid return port 17 are both provided with a bushing structure.

[0042] See also Figure 2 and Figure 3 Specifically, the electrolytic cell 1 includes an end pressure plate 19, a diaphragm gasket 20, an electrode grid electrode plate 21, and an intermediate electrode plate 22 arranged in the middle position.

[0043] Specifically, the middle of the intermediate plate 22 is divided into a hydrogen side chamber 24 and an oxygen side chamber 25 by a partition plate 23, and a hydrogen output hole 26 and a hydrogen side liquid hole 27 communicating with the hydrogen side chamber 24 are provided on the frame of the intermediate plate 22;

[0044] The hydrogen output hole 26 and the hydrogen side liquid hole 27 are both provided with a bushing structure.

[0045] Specifically, the frame of the intermediate plate 22 is provided with an oxygen output hole 28 and an oxygen side liquid hole 29 which are communicated with the oxygen side chamber 25;

[0046] The oxygen output hole 28 and the oxygen side liquid hole 29 are both provided with a bushing structure.

[0047] Specifically, a hydrogen-containing electrolyte chamber 30 with a flat cavity structure is provided on one side of the upper end of the intermediate electrode plate 22, and a hydrogen-side liquid return hole 31 interconnected with the hydrogen-containing electrolyte chamber 30 is provided on the frame of the intermediate electrode plate 22;

[0048] The hydrogen-side liquid return hole 31 has a bushing structure.

[0049] Specifically, an oxygen-containing electrolyte cavity 32 with a flat cavity structure is provided on the frame of the intermediate electrode plate 22, and an oxygen-side liquid return hole 33 interconnected with the oxygen-containing electrolyte cavity 32 is provided on the frame of the intermediate electrode plate 22;

[0050] The oxygen-side liquid return hole 33 has a bushing structure.

[0051] Specifically, the diaphragm gasket 20 is a thin sheet structure, and the hydrogen output hole 26 , the hydrogen side liquid hole 27 , the oxygen output hole 28 , the oxygen side liquid hole 29 , the hydrogen side liquid return hole 31 and the oxygen side liquid return hole 33 are all distributed on the diaphragm gasket 20 .

[0052] Working principle:

[0053] When performing corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production operations:

[0054] First, the electrolyte is electrolyzed in the electrolytic cell 1 to produce liquid hydrogen and liquid oxygen;

[0055] Then, the liquid hydrogen is separated to produce hydrogen and hydrogen-containing residual liquid, and the liquid oxygen is separated to produce oxygen and oxygen-containing residual liquid, and the hydrogen and oxygen are collected through the oxygen output pipe 13 and the hydrogen output pipe 12 respectively;

[0056] Then, the oxygen-containing residual liquid and the hydrogen-containing residual liquid are filtered and cooled, and then flow back to the oxygen-side chamber 25 and the hydrogen-side chamber 24 of the electrolytic cell 1, respectively, to form an oxygen-containing electrolyte and a hydrogen-containing electrolyte, respectively;

[0057] Finally, the oxygen-containing electrolyte and the hydrogen-containing electrolyte undergo independent oxygen-side circulation and hydrogen-side circulation processes respectively, and the oxygen separator 4 in the oxygen-side circulation process and the hydrogen separator 2 in the hydrogen-side circulation process are connected through the migration tube 18 .

[0058] When the electrolyte is refluxed, the alkali solution and gas flow channels of the electrolytic cell 1 are protected by the bushing structure, which improves the current efficiency and reduces the risk of corrosion. The service life is long, and the overhaul period is more than ten years on average.

[0059] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A corrosion-resistant, high-current-efficiency, discrete circulating water electrolysis hydrogen production equipment, comprising an electrolytic cell (1), a hydrogen separator (2) mounted on a hydrogen gas discharge interface of the electrolytic cell (1), and an oxygen separator (4) mounted on an oxygen gas discharge interface of the electrolytic cell (1), characterized in that: The gas output port of the hydrogen separator (2) is connected to a hydrogen integrated tower (3) via a pipeline, a hydrogen output pipe (12) is fixedly installed at the output port of the hydrogen integrated tower (3), a hydrogen-containing reflux pipe (14) is fixedly connected to the liquid output port of the hydrogen separator (2), one end of the hydrogen-containing reflux pipe (14) is connected to a hydrogen side pump (6), the output port of the hydrogen side pump (6) is connected to a hydrogen side filter (7) via a pipeline, the output port of the hydrogen side filter (7) is connected to a hydrogen side cooler (8) via a pipeline, a hydrogen side liquid return port (15) is fixedly provided on one side of the electrolyzer (1), and the output port of the hydrogen side cooler (8) is connected to the hydrogen side liquid return port (15) via a pipeline; The gas output port of the oxygen separator (4) is connected to the aerobic integrated tower (5) through a pipeline, the output port of the oxygen integrated tower (5) is fixedly installed with an oxygen output pipe (13), the liquid output port of the oxygen separator (4) is fixedly connected with an oxygen-containing reflux pipe (16), one end of the oxygen-containing reflux pipe (16) is connected to an aerobic side pump (9), the output port of the oxygen side pump (9) is connected to an aerobic side filter (10) through a pipeline, the output port of the oxygen side filter (10) is connected to an aerobic side cooler (11) through a pipeline, the other side of the electrolytic cell (1) is fixedly provided with an oxygen side liquid return port (17), and the output port of the oxygen side cooler (11) is connected to the oxygen side liquid return port (17) through a pipeline; A migration tube (18) is provided between the hydrogen separator (2) and the oxygen separator (4), and the two are connected via the migration tube (18).

2. The corrosion-resistant, high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 1, characterized in that: The hydrogen-side liquid return port (15) and the oxygen-side liquid return port (17) are both provided with a bushing structure.

3. The corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 1, characterized in that: The electrolytic cell (1) comprises an end pressure plate (19), a diaphragm gasket (20), a pole grid pole plate (21), and an intermediate pole plate (22) arranged in the middle.

4. The corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 3 is characterized by: The middle part of the intermediate plate (22) is divided into a hydrogen side chamber (24) and an oxygen side chamber (25) by a partition plate (23), and a hydrogen output hole (26) and a hydrogen side liquid hole (27) communicating with the hydrogen side chamber (24) are provided on the frame of the intermediate plate (22); The hydrogen output hole (26) and the hydrogen side liquid hole (27) are both provided with a bushing structure.

5. The corrosion-resistant and high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 3 is characterized by: The frame of the intermediate plate (22) is provided with an oxygen output hole (28) and an oxygen side liquid hole (29) which are in communication with the oxygen side chamber (25); The oxygen output hole (28) and the oxygen side liquid hole (29) are both provided with a bushing structure.

6. The corrosion-resistant, high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 3, characterized in that: A hydrogen-containing electrolyte chamber (30) with a flat cavity structure is provided on one side of the upper end of the intermediate electrode plate (22), and a hydrogen-side liquid return hole (31) communicating with the hydrogen-containing electrolyte chamber (30) is provided on the frame of the intermediate electrode plate (22); The hydrogen side liquid return hole (31) has a bushing structure.

7. The corrosion-resistant, high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 3, characterized in that: An oxygen-containing electrolyte cavity (32) with a flat cavity structure is provided on the frame of the intermediate electrode plate (22), and an oxygen-side liquid return hole (33) which is interconnected with the oxygen-containing electrolyte cavity (32) is provided on the frame of the intermediate electrode plate (22); The oxygen-side liquid return hole (33) has a bushing structure.

8. The corrosion-resistant, high-current-efficiency discrete circulating water electrolysis hydrogen production equipment according to claim 4, characterized in that: The diaphragm gasket (20) is a thin sheet structure, and the hydrogen output hole (26), the hydrogen side liquid hole (27), the oxygen output hole (28), the oxygen side liquid hole (29), the hydrogen side liquid return hole (31) and the oxygen side liquid return hole (33) are all distributed on the diaphragm gasket (20).

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