Seawater electrolysis hydrogen production device

Abstract

The utility model relates to the technical field of electrolytic hydrogen production, and particularly discloses a seawater electrolytic hydrogen production device which comprises a seawater buffer tank, an electrolytic bath, a primary heat exchanger, a secondary heat exchanger and a phase change mass transfer tank, a first cold water inlet, a first cold water outlet, a hot water inlet and a hot water outlet are formed in the first-stage heat exchanger, the hot water outlet is connected with a drainage pipeline, a second cold water inlet, a second cold water outlet, a hot alkali inlet and a hot alkali outlet are formed in the second-stage heat exchanger, the hot alkali inlet is connected with an alkali inlet pipeline, and the phase change mass transfer tank comprises a seawater side and an alkali liquor side. A seawater side inlet and a seawater side outlet are formed in the bottom and the top of the seawater side, and an alkali liquor side inlet and an alkali liquor side outlet are formed in the bottom and the top of the alkali liquor side. The seawater hydrogen production process and equipment are simplified, the seawater does not need to be desalted to obtain pure water to prepare hydrogen, and the hydrogen production energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic hydrogen production, and specifically discloses a seawater electrolytic hydrogen production device. Background Art

[0002] Hydrogen is a valuable chemical raw material used in metal smelting and industrial fuel, and can also be used as a reducing agent to prevent oxidation in production. Currently, common hydrogen production methods include hydrogen production from various fossil fuels, water electrolysis, biomass production, and the recovery of hydrogen by-products from various chemical processes. Of these, water electrolysis is becoming the most important method due to its pollution-free operation and low raw material costs.

[0003] The electrolysis of water to produce hydrogen consumes a high amount of raw water. Using fresh water would be a significant waste of fresh water resources, making the use of seawater electrolysis necessary. However, existing seawater hydrogen production technologies often involve first desalinating seawater to produce pure water, which is then electrolyzed to produce hydrogen. This method is cumbersome, requires complex equipment, and increases energy consumption. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the present invention provides a seawater electrolysis hydrogen production device, which simplifies the seawater hydrogen production process and equipment, eliminates the need to desalinate seawater to obtain pure water and then prepare hydrogen, and reduces the energy consumption of hydrogen production.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The seawater electrolysis hydrogen production device includes a seawater cache tank and an electrolytic cell, and also includes a primary heat exchanger, a secondary heat exchanger and a phase change mass transfer tank connected to each other. The electrolytic cell is connected to the alkali solution cache tank. A ceramic membrane is fixedly arranged in the seawater cache tank, and a water outlet is arranged on the top of the ceramic membrane. The primary heat exchanger is respectively provided with a cold water inlet 1, a cold water outlet 1, a hot water inlet and a hot water outlet. The water outlet is connected to the cold water inlet 1 through a pipe, and the hot water outlet is connected to a drainage pipe. The secondary heat exchanger is respectively provided with a cold water inlet 2, a cold water outlet 2, a hot alkali inlet and a hot alkali outlet. The phase change mass transfer tank comprises a seawater side and an alkali solution side, the seawater side and the alkali solution side are separated by a polytetrafluoroethylene membrane, the bottom and top of the seawater side are respectively provided with a seawater side inlet and a seawater side outlet, the bottom and top of the alkali solution side are respectively provided with an alkali solution side inlet and an alkali solution side outlet, the seawater side inlet and the alkali solution side inlet are respectively connected to the cold water outlet 2 and the hot alkali outlet through pipes, and the seawater side outlet and the alkali solution side outlet are respectively connected to the hot water inlet and the alkali solution buffer tank through pipes.

[0007] Furthermore, a water inlet is provided on the side wall of the seawater buffer tank, and the water inlet is connected to a water inlet pipeline.

[0008] Furthermore, a flow meter 1 and a negative pressure gauge 1 are sequentially provided on the pipeline between the water outlet and the cold water inlet 1.

[0009] Furthermore, a seawater self-priming pump is provided on the drainage pipeline.

[0010] Furthermore, a flow meter 2 and a negative pressure gauge 2 are sequentially arranged on the alkali inlet pipeline.

[0011] Furthermore, an alkali inlet and an alkali outlet are respectively provided on the top and side wall of the alkali solution buffer tank. The alkali inlet is connected to the alkali solution side outlet through a pipeline, and the alkali outlet is connected to the alkali drainage pipeline.

[0012] Furthermore, an electrolytic cell inlet and an electrolytic cell outlet are respectively provided on the side walls on both sides of the electrolytic cell, and one end of the alkali discharge pipeline away from the alkali outlet is connected to the electrolytic cell inlet.

[0013] Furthermore, an alkali liquid pump is provided on the alkali discharge pipeline.

[0014] Furthermore, a pH meter 1 is provided on a side of the pipeline connecting the cold water outlet 2 and the seawater inlet, close to the seawater inlet.

[0015] Furthermore, a pH meter 2 is provided on the side of the pipeline connecting the hot water inlet and the seawater outlet close to the seawater outlet.

[0016] The beneficial effects of the utility model are:

[0017] Through the setting of ceramic membranes, microorganisms in seawater can be effectively filtered to ensure the purity of the produced hydrogen; through the setting of primary and secondary heat exchangers, sufficient heat exchange between seawater and alkali solution can be guaranteed, and sufficient recovery and utilization of thermal energy can be achieved, thereby reducing the energy consumption of hydrogen production; through the setting of polytetrafluoroethylene membranes in the phase change mass transfer tank, a phase change mass transfer process is carried out between seawater and alkali solution, and the alkali solution absorbs the water vapor evaporated from the seawater, and then the seawater in the alkali solution can be electrolyzed to produce hydrogen, avoiding the process of seawater desalination and further ensuring the reduction of energy consumption of hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] In the figure: 1. Seawater buffer tank; 2. Alkali solution buffer tank; 3. Primary heat exchanger; 4. Secondary heat exchanger; 5. Phase change mass transfer tank; 6. Ceramic membrane; 7. Water outlet; 8. Cold water inlet 1; 9. Cold water outlet 1; 10. Hot water inlet; 11. Hot water outlet; 12. Cold water inlet 2; 13. Cold water outlet 2; 14. Hot alkali inlet; 15. Hot alkali outlet; 16. Seawater side inlet; 17. Alkali solution side inlet; 18. Seawater side outlet; 19. Alkali solution side outlet; 20. Flow 1. Flowmeter 1; 21. Negative pressure gauge 1; 22. Drainage pipeline; 23. Alkali inlet pipeline; 24. Water inlet pipeline; 25. Alkali drainage pipeline; 26. Water inlet; 27. Seawater self-priming pump; 28. Flowmeter 2; 29. ​​Negative pressure gauge 2; 30. Alkali inlet; 31. Alkali outlet; 32. Alkali liquid pump; 33. pH meter 1; 34. pH meter 2; 35. Polytetrafluoroethylene membrane; 36. Seawater side; 37. Alkali liquid side; 38. Electrolytic cell; 39. Electrolytic cell inlet; 40. Electrolytic cell outlet. DETAILED DESCRIPTION

[0020] The present invention will be described and explained in detail below with reference to the accompanying drawings.

[0021] Example 1

[0022] like Figure 1 As shown, the seawater electrolysis hydrogen production device includes a seawater cache tank 1 and an electrolytic cell 38, and also includes a primary heat exchanger 3, a secondary heat exchanger 4 and a phase change mass transfer tank 5 connected to each other. The electrolytic cell 38 is connected to the alkali solution cache tank 2. A ceramic membrane 6 is fixedly provided in the seawater cache tank 1, and a water outlet 7 is provided on the top of the ceramic membrane 6. A cold water inlet 8, a cold water outlet 9, a hot water inlet 10 and a hot water outlet 11 are respectively provided on the primary heat exchanger 3. The water outlet 7 is connected to the cold water inlet 8 through a pipe, and the hot water outlet 11 is connected to the drainage pipe 22. The secondary heat exchanger 4 is respectively provided with a cold water inlet 12, a cold water outlet 13, a hot alkali inlet 14 and a hot alkali outlet 15. The cold water inlet 12 is connected to the cold water outlet 1 9 through a pipeline, the hot alkali inlet 14 is connected to the alkali inlet pipeline 23, the phase change mass transfer tank 5 includes a seawater side 36 and an alkali solution side 37, the seawater side 36 and the alkali solution side 37 are separated by a polytetrafluoroethylene membrane 35, the bottom and top of the seawater side 36 are respectively provided with a seawater side inlet 16 and a seawater side outlet 18, the bottom and top of the alkali solution side 37 are respectively provided with an alkali solution side inlet 17 and an alkali solution side outlet 19, the seawater side inlet 16 and the alkali solution side inlet 17 are respectively connected to the cold water outlet 2 13 and the hot alkali outlet 15 through pipelines, and the seawater side outlet 18 and the alkali solution side outlet 19 are respectively connected to the hot water inlet 10 and the alkali solution cache tank 2 through pipelines.

[0023] By setting the ceramic membrane 6, microorganisms in seawater can be effectively filtered to ensure the purity of the hydrogen produced; by setting the primary heat exchanger 3 and the secondary heat exchanger 4, sufficient heat exchange between seawater and alkali solution can be ensured, sufficient recovery and utilization of thermal energy can be achieved, and the energy consumption of hydrogen production is reduced; by setting the polytetrafluoroethylene membrane 35 in the phase change mass transfer tank 5, a phase change mass transfer process occurs between seawater and alkali solution, the alkali solution absorbs water vapor evaporated from the seawater, and then the seawater in the alkali solution can be electrolyzed to produce hydrogen, avoiding the process of seawater desalination and further ensuring the reduction of energy consumption of hydrogen production.

[0024] A water inlet 26 is provided on the side wall of the seawater buffer tank 1 , and the water inlet 26 is connected to a water inlet pipeline 24 .

[0025] A flow meter 20 and a negative pressure gauge 21 are provided in sequence on the pipe between the water outlet 7 and the cold water inlet 8. By providing the flow meter 20 and the negative pressure gauge 21, the flow rate and negative pressure of the seawater discharged from the seawater buffer tank 1 can be monitored at all times.

[0026] A seawater self-priming pump 27 is provided on the drainage pipe 22 .

[0027] A flow meter 28 and a negative pressure gauge 29 are sequentially provided on the alkali inlet pipeline 23. By providing the flow meter 28 and the negative pressure gauge 29, the flow rate and the negative pressure of the pressurized alkali solution in the alkali inlet pipeline 23 can be monitored at all times.

[0028] An alkali inlet 30 and an alkali outlet 31 are respectively provided on the top and side wall of the alkali solution buffer tank 2 . The alkali inlet 30 is connected to the alkali solution side outlet 19 through a pipeline, and the alkali outlet 31 is connected to the alkali discharge pipeline 25 .

[0029] An electrolytic cell inlet 39 and an electrolytic cell outlet 40 are respectively provided on the side walls on both sides of the electrolytic cell 38 , and one end of the alkali discharge pipeline 25 away from the alkali outlet 31 is connected to the electrolytic cell inlet 39 .

[0030] A lye pump 32 is provided on the alkali discharge pipeline 25 .

[0031] A pH meter 33 is provided on the side of the pipe connecting the cold water outlet 2 13 and the seawater side inlet 16 near the seawater side inlet 16 to detect the pH value of the seawater at the seawater side inlet 16.

[0032] A pH meter 34 is provided on the side of the pipe connecting the hot water inlet 10 and the seawater outlet 18 near the seawater outlet 18 to detect the pH value of the seawater at the seawater outlet 18.

[0033] Working principle and process:

[0034] First, turn on the seawater self-priming pump 27, and the 20-30℃ seawater enters the seawater buffer tank 1 from the water inlet pipe 24 through the water inlet 26. Then, after the 20-30℃ seawater is filtered through the ceramic membrane 6 to remove microorganisms, it enters the primary heat exchanger 3 from the water outlet 7 through the pipeline through the cold water inlet 8. The 20-30℃ seawater is heated to 45-55℃ in the primary heat exchanger 3 through heat exchange, and enters the secondary heat exchanger 4 from the cold water outlet 9 through the pipeline through the cold water inlet 2 12. Turn on the alkali pump 32, and pressurized 85-95℃ alkali enters the secondary heat exchanger 4 from the alkali inlet pipe 23 through the hot alkali inlet 14. The 45-55℃ seawater is heated to 70-80℃ through heat exchange, and enters the phase change mass transfer tank 5 from the cold water outlet 2 13 through the pipeline through the seawater side inlet 16. The 85-95℃ alkali solution is cooled to 40-5 0℃, and enters the phase change mass transfer tank 5 from the hot alkali outlet 15 through the pipeline through the alkali liquid side inlet 17; 70-80℃ seawater and 40-50℃ alkali liquid undergo a phase change mass transfer process in the phase change mass transfer tank 5, and the water vapor generated by evaporation of the seawater enters the alkali liquid. After the phase change mass transfer process is completed, the alkali liquid enters the alkali liquid buffer tank 2 from the alkali liquid side outlet 19 through the pipeline through the alkali inlet 30, and then the alkali liquid enters the electrolytic cell 38 from the alkali outlet 31 through the alkali discharge pipeline 25 for electrolysis, the 70-80℃ seawater drops to 55-65℃, and enters the first-level heat exchanger 3 from the seawater side outlet 18 through the pipeline through the hot water inlet 10 to exchange heat with the 20-30℃ seawater, forming a cycle. After heat exchange, the 55-65℃ seawater drops to 30-40℃ and is discharged from the hot water outlet 11 through the drainage pipeline 22.

Claims

1. A seawater electrolysis hydrogen production device, comprising a seawater buffer tank (1) and an electrolytic cell (38), characterized in that: The invention also includes a first-stage heat exchanger (3), a second-stage heat exchanger (4) and a phase change mass transfer tank (5) connected to each other, an electrolytic cell (38) and an alkali solution buffer tank (2), a ceramic membrane (6) is fixedly provided in the seawater buffer tank (1), a water outlet (7) is provided on the top of the ceramic membrane (6), a cold water inlet (8), a cold water outlet (9), a hot water inlet (10) and a hot water outlet (11) are provided on the first-stage heat exchanger (3), the water outlet (7) is connected to the cold water inlet (8) through a pipe, and the hot water outlet (11) is connected to a drainage pipe (22), a cold water inlet (12), a cold water outlet (13), a hot alkali inlet (14) and a hot alkali outlet (15) are provided on the second-stage heat exchanger (4), the cold water inlet (12) is connected to the cold water outlet (13) through a pipe, and the hot water outlet (11) is connected to the drainage pipe (22). The water outlet (9) and the hot alkali inlet (14) are connected to the alkali inlet pipeline (23). The phase change mass transfer tank (5) includes a seawater side (36) and an alkali solution side (37). The seawater side (36) and the alkali solution side (37) are separated by a polytetrafluoroethylene membrane (35). The bottom and top of the seawater side (36) are respectively provided with a seawater side inlet (16) and a seawater side outlet (18). The bottom and top of the alkali solution side (37) are respectively provided with an alkali solution side inlet (17) and an alkali solution side outlet (19). The seawater side inlet (16) and the alkali solution side inlet (17) are respectively connected to the cold water outlet (13) and the hot alkali outlet (15) through pipelines. The seawater side outlet (18) and the alkali solution side outlet (19) are respectively connected to the hot water inlet (10) and the alkali solution buffer tank (2) through pipelines.

2. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A water inlet (26) is provided on the side wall of the seawater buffer tank (1), and the water inlet (26) is connected to a water inlet pipeline (24).

3. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A flow meter (20) and a negative pressure gauge (21) are sequentially provided on the pipeline between the water outlet (7) and the cold water inlet (8).

4. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A seawater self-priming pump (27) is provided on the drainage pipeline (22).

5. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A second flow meter (28) and a second negative pressure gauge (29) are sequentially provided on the alkali inlet pipeline (23).

6. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: An alkali inlet (30) and an alkali outlet (31) are respectively provided on the top and side wall of the alkali solution buffer tank (2); the alkali inlet (30) is connected to the alkali solution side outlet (19) through a pipeline, and the alkali outlet (31) is connected to the alkali discharge pipeline (25).

7. The seawater electrolysis hydrogen production device according to claim 6, characterized in that: An electrolytic cell inlet (39) and an electrolytic cell outlet (40) are respectively provided on the side walls on both sides of the electrolytic cell (38), and one end of the alkali discharge pipeline (25) away from the alkali outlet (31) is connected to the electrolytic cell inlet (39).

8. The seawater electrolysis hydrogen production device according to claim 6, characterized in that: A lye pump (32) is provided on the alkali discharge pipeline (25).

9. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A pH meter 1 (33) is provided on a side of the pipeline connecting the cold water outlet 2 (13) and the seawater side inlet (16) close to the seawater side inlet (16).

10. The seawater electrolysis hydrogen production device according to claim 1, characterized in that: A second pH meter (34) is provided on a side of the pipeline connecting the hot water inlet (10) and the seawater outlet (18) close to the seawater outlet (18).

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