Novel alkaline water electrolysis hydrogen production device

Abstract

The invention discloses a novel alkaline water electrolysis hydrogen production device which comprises a frame, an alkaline liquid circulating pump is arranged on the frame, an outlet of the alkaline liquid circulating pump is connected with an alkaline liquid cooler, the alkaline liquid cooler is respectively connected with an electrolytic bath, a cooling water pipeline I and a cooling water pipeline II, and the electrolytic bath is respectively connected with a hydrogen production unit and an oxygen production unit. The device solves the problems that an existing hydrogen production device is large in number of transportation units and low in transportation and installation efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production equipment, and particularly relates to a novel alkaline water electrolysis hydrogen production device. Background Art

[0002] Hydrogen energy is a secondary energy source with rich sources, green and low-carbon, and wide applications, and is gradually becoming one of the important carriers for the global energy transformation and development. The alkaline water electrolysis hydrogen production technology has a high market maturity and is the only electrolysis water hydrogen production technology that can achieve large-scale and low-cost production. The gas-liquid separation device is a key equipment in the alkaline water electrolysis hydrogen production system. During the hydrogen production process in the alkaline water electrolyzer, hydrogen, a mixture of electrolyte and water is generated at the cathode of the electrolyzer, and oxygen, a mixture of electrolyte and water is generated at the anode. In the actual operation of the hydrogen production system, in order to obtain hydrogen / oxygen with higher purity, the mixtures generated at the anode and cathode need to be separated by a gas-liquid separation device. Currently, the equipment structure of the alkaline water electrolysis hydrogen production process is mainly single-layer, with a large volume. During transportation, each container, the pipelines between containers, and the instruments and meters on the pipelines need to be disassembled, resulting in a large number of transportation units and greatly reducing the transportation and installation efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a novel alkaline water electrolysis hydrogen production device, which solves the problems of a large number of transportation units and low transportation and installation efficiency in the existing hydrogen production device.

[0004] The technical solution adopted by the present invention is that the novel alkaline water electrolysis hydrogen production device includes a frame, on which an alkali liquid circulation pump is arranged. The outlet of the alkali liquid circulation pump is connected to an alkali liquid cooler, and the alkali liquid cooler is respectively connected to an electrolyzer, a cooling water pipeline I, and a cooling water pipeline II. The electrolyzer is respectively connected to a hydrogen production unit and an oxygen production unit.

[0005] The characteristics of the present invention further lie in that

[0006] The alkali liquid cooler includes an alkali liquid cooler A and an alkali liquid cooler B. The alkali liquid cooler A is provided with an alkali liquid inlet I, an alkali liquid outlet I, a cooling water inlet I, and a cooling water outlet I. The alkali liquid cooler B is provided with an alkali liquid inlet II, an alkali liquid outlet II, a cooling water inlet II, and a cooling water outlet II;

[0007] The alkali liquid inlet I is connected to the alkali liquid circulation pump, the alkali liquid outlet I is connected to the alkali liquid inlet II, the alkali liquid inlet II is connected to the electrolyzer, the cooling water inlet I is connected to the cooling water pipeline II, the cooling water outlet I is connected to the cooling water pipeline I, the cooling water inlet II is connected to the cooling water pipeline II, and the cooling water outlet II is connected to the cooling water pipeline I.

[0008] The hydrogen production unit includes a hydrogen-alkali separator, which is provided with a feed inlet I, a gas outlet I, a discharge outlet I, a water replenishment inlet I and a balance port I. The feed inlet I is connected to the electrolytic cell, the gas outlet I and the water replenishment inlet I are both connected to the hydrogen comprehensive tower, the discharge outlet I is connected to the alkali liquor circulation pump, the balance port I is connected to the oxygen production unit. The hydrogen comprehensive tower is respectively connected to the pure water pipeline and the hydrogen cooler. The hydrogen cooler is respectively connected to the hydrogen-water separator, the hydrogen-side drainer, the chilled water pipeline I and the chilled water pipeline II. The hydrogen-water separator is connected to the hydrogen storage tank.

[0009] The oxygen production unit includes an oxygen-alkali separator, which is provided with a feed inlet II, a gas outlet II, a discharge outlet II, a water replenishment inlet II and a balance port II. The feed inlet II is connected to the electrolytic cell, the gas outlet II and the water replenishment inlet II are both connected to the oxygen comprehensive tower, the discharge outlet II is connected to the alkali liquor circulation pump, the balance port II is connected to the hydrogen production unit. The oxygen comprehensive tower is respectively connected to the pure water pipeline and the oxygen cooler. The oxygen cooler is respectively connected to the oxygen-water separator, the oxygen-side drainer, the chilled water pipeline I and the chilled water pipeline II. The oxygen-water separator is connected to the oxygen storage tank.

[0010] The hydrogen comprehensive tower and the oxygen comprehensive tower have the same structure, and both include a tower body. The top of the tower body is provided with a gas outlet III, the side wall of the tower body is provided with a water replenishment inlet and a water replenishment outlet. An air inlet channel is arranged inside the tower body, one end of the air inlet channel extends out of the side wall of the tower body, and the other end of the air inlet channel is arranged below the water replenishment inlet. A wire mesh demister is arranged inside the tower body, and the wire mesh demister is arranged above the gas channel. A liquid level transmitter is arranged on the tower body.

[0011] A hydrogen-side liquid level transmitter is arranged on the hydrogen-alkali separator. A hydrogen-side regulating valve is arranged between the hydrogen-water separator and the hydrogen storage tank. A drain port I is arranged on the hydrogen-water separator, and a hydrogen-side safety valve is arranged on the drain port I.

[0012] An oxygen-side liquid level transmitter and an oxygen-side pressure transmitter are arranged on the oxygen-alkali separator. An oxygen-side regulating valve is arranged between the oxygen-water separator and the oxygen storage tank. A drain port II is arranged on the oxygen-water separator, and an oxygen-side safety valve is arranged on the drain port II.

[0013] The frame includes an upper frame and a lower frame. Ear plates I are arranged at the four corners of the bottom of the upper frame. Ear plates II are arranged at the top of the lower frame. The ear plates I and the ear plates II correspond one by one and are connected by bolts. Alkali liquor coolers A, alkali liquor cooler B and an alkali liquor circulation pump are arranged on the inner bottom of the lower frame. The hydrogen-side drainer and the oxygen-side drainer are arranged at the inner top of the lower frame. A cross beam is arranged in the middle of the upper frame. The hydrogen-alkali separator, the hydrogen comprehensive tower, the oxygen comprehensive tower and the oxygen-alkali separator are arranged at the bottom of the upper frame. The hydrogen-water separator and the oxygen-water separator are arranged on the cross beam. The hydrogen cooler and the oxygen cooler are arranged at the top of the upper frame.

[0014] A convex positioning block is provided at each diagonal of the bottom of the upper frame, and a concave positioning block is provided at each diagonal of the top of the lower frame. The convex positioning block cooperates with the concave positioning block.

[0015] The beneficial effects of the present invention are as follows:

[0016] (1) For the novel alkaline water electrolysis hydrogen production device of the present invention, by providing the upper frame and the lower frame, it can be transported as two units during transportation, with fewer transportation units, lower transportation costs, simple disassembly, labor savings, and improved transportation efficiency;

[0017] (2) For the novel alkaline water electrolysis hydrogen production device of the present invention, due to the convex positioning block and the concave positioning block for positioning the upper frame and the lower frame, the installation is convenient, time-saving, and the installation efficiency is improved;

[0018] (3) For the novel alkaline water electrolysis hydrogen production device of the present invention, the process design is reasonable. Hydrogen and alkali solution pass through the hydrogen comprehensive tower to wash the hydrogen, and oxygen and alkali solution pass through the oxygen comprehensive tower to wash the oxygen. As a result, the hydrogen and oxygen basically wash away the alkali solution, greatly reducing the alkali solution content in the gas, reducing alkaline corrosion, while reducing the consumption of alkali solution, avoiding the formation of liquid seal when the gas-liquid two phases are cooled with cold water at the same time, increasing the system pressure. At the same time, it also avoids design difficulties, heat transfer deterioration, equipment damage, etc. caused by different relative flow velocities and flow patterns of the gas-liquid two phases. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the novel alkaline water electrolysis hydrogen production device of the present invention;

[0020] Figure 2 It is a front view of the upper frame and the lower frame of the novel alkaline water electrolysis hydrogen production device of the present invention;

[0021] Figure 3 It is a side view of the upper frame and the lower frame of the novel alkaline water electrolysis hydrogen production device of the present invention;

[0022] Figure 4 It is a top view of the upper frame and the lower frame of the novel alkaline water electrolysis hydrogen production device of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the concave positioning block in the novel alkaline water electrolysis hydrogen production device of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the convex positioning block in the novel alkaline water electrolysis hydrogen production device of the present invention;

[0025] Figure 7 It is a schematic structural diagram of the comprehensive tower in the novel alkaline water electrolysis hydrogen production device of the present invention.

[0026] In the figure, 1. caustic liquor cooler A, 2. caustic liquor cooler B, 3. hydrogen-alkali separator, 4. hydrogen cooler, 5. hydrogen synthesis tower, 6. oxygen synthesis tower, 7. oxygen cooler, 8. oxygen-alkali separator, 9. hydrogen-water separator, 10. oxygen-water separator, 11. hydrogen-side drainer, 12. oxygen-side drainer, 13. caustic liquor circulation pump, 14. upper frame, 15. lower frame, 16. concave positioning block, 17. convex positioning block, 18. ear plate I, 19. ear plate II, 20. bolt and nut, 21. hydrogen-side regulating valve, 22. hydrogen-side safety valve, 23. hydrogen-side liquid level transmitter, 24. oxygen-side regulating valve, 25. oxygen-side safety valve, 26. oxygen-side liquid level transmitter, 27. oxygen-side pressure transmitter, 28. tower body, 29. make-up water inlet, 30. make-up water outlet, 31. air inlet passage, 32. wire mesh demister, 33. gas outlet III, 34. electrolytic cell, 35. cooling water pipeline I, 36. cooling water pipeline II, 37. chilled water pipeline I, 38. chilled water pipeline II, 39. liquid level transmitter, 40. cross beam. Detailed implementation mode

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and the specific implementation mode.

[0028] Example 1

[0029] The novel alkaline water electrolysis hydrogen production device of the present invention has a structure as Figure 1 shown, including a frame, on which a caustic liquor circulation pump 13 is arranged. The outlet of the caustic liquor circulation pump 13 is connected to a caustic liquor cooler, which is respectively connected to an electrolytic cell 34, a cooling water pipeline I 35, and a cooling water pipeline II 36. The electrolytic cell 34 is respectively connected to a hydrogen production unit and an oxygen production unit. The caustic liquor circulation pump 13 pumps the caustic liquor in the hydrogen production unit and the oxygen production unit into the caustic liquor cooler for cooling, and the cooled caustic liquor enters the electrolytic cell 34. The cooling water pipeline II 36 is used to cool the caustic liquor in the caustic liquor cooler.

[0030] The lye cooler includes a lye cooler A1 and a lye cooler B2. The lye cooler A1 is provided with a lye inlet I, a lye outlet I, a cooling water inlet I, and a cooling water outlet I. The lye inlet I and the cooling water inlet I are respectively arranged at both ends of the lye cooler A1. The lye outlet I and the cooling water outlet I are respectively arranged at both ends of the lye cooler A1. And the lye inlet I and the cooling water outlet I are arranged on the same side, and the cooling water inlet I and the lye outlet I are arranged on the same side. The lye cooler B2 is provided with a lye inlet II, a lye outlet II, a cooling water inlet II, and a cooling water outlet II. The lye inlet I is connected to the lye circulation pump 13, the lye outlet I is connected to the lye inlet II, the lye inlet II is connected to the electrolytic cell 34, the cooling water inlet I is connected to the cooling water pipeline II36, the cooling water outlet I is connected to the cooling water pipeline I35, the cooling water inlet II is connected to the cooling water pipeline II36, and the cooling water outlet II is connected to the cooling water pipeline I35. Then the lye sequentially enters the lye cooler A1 and the lye cooler B2, and then flows out through the lye cooler B2 and enters the electrolytic cell 34 for electrolysis.

[0031] The hydrogen production unit includes a hydrogen-alkali separator 3, which is a horizontal container arranged vertically. The hydrogen-alkali separator 3 is provided with a feed port I, a gas outlet I, a discharge port I, a water replenishment port I and a balance port I. The feed port I is connected to the electrolyzer 34, the gas outlet I and the water replenishment port I are both connected to the hydrogen comprehensive tower 5, the discharge port I is connected to the alkali liquid circulation pump 13, the balance port I is connected to the oxygen production unit, the hydrogen comprehensive tower 5 is respectively connected to the pure water pipeline and the hydrogen cooler 4, the hydrogen cooler 4 is respectively connected to the hydrogen-water separator 9, the hydrogen side drainer 11, the chilled water pipeline I37, and the chilled water pipeline II38, the hydrogen-water separator 9 is connected to the hydrogen storage tank, the hydrogen-water separator 9 is a vertical container, and the hydrogen side drainer 11 is used to collect condensed water from the hydrogen cooler 4 and sewage from the hydrogen-water separator 9. A mixture of hydrogen and alkali liquid enters the hydrogen-alkali separator 3 through the feed port, and the hydrogen and alkali liquid are separated by gravity; the gas outlet I and the water replenishment port I of the hydrogen-alkali separator 3 are connected to the hydrogen comprehensive tower 5, and the separated hydrogen enters the hydrogen comprehensive tower 5; the discharge port I of the hydrogen-alkali separator 3 is connected to the discharge port II of the oxygen-alkali separator 8 and then connected to the inlet of the alkali liquid circulation pump 13, and the separated alkali liquid enters the alkali liquid circulation loop; the balance port I of the hydrogen-alkali separator 3 is connected to the balance port II of the oxygen-alkali separator 8, which plays a role in balancing the internal pressures of the hydrogen-alkali separator 3 and the oxygen-alkali separator 8; a hydrogen side liquid level transmitter 23 is provided on the hydrogen-alkali separator 3, a hydrogen side regulating valve 21 is provided between the hydrogen-water separator 9 and the hydrogen storage tank, an emptying port I is provided on the hydrogen-water separator 9, and a hydrogen side safety valve 22 is provided on the emptying port I to ensure the safety of the water electrolysis hydrogen production process when the hydrogen pipeline is blocked. A hydrogen-side regulating valve 21 is provided on the pipeline through which the qualified hydrogen produced by the hydrogen-water separator 9 enters the hydrogen storage tank. The hydrogen-side regulating valve 21 adjusts the opening of the hydrogen-side regulating valve 21 according to the signals of the hydrogen-side liquid level transmitter 23 provided in the hydrogen-alkali separator 3 and the oxygen-side liquid level transmitter 26 of the oxygen-alkali separator 8 to ensure the system liquid level balance and the separation effect of the separator.

[0032] The oxygen generation unit includes an oxygen-alkali separator 8. The oxygen-alkali separator 8 is a horizontally arranged horizontal container. The oxygen-alkali separator 8 is provided with a feed port II, a gas outlet II, a discharge port II, a water replenishment port II and a balance port II. The feed port II is connected to the electrolytic cell 34. The gas outlet II and the water replenishment port II are both connected to the oxygen synthesis tower 6. The discharge port II is connected to the alkali liquor circulation pump 13. The balance port II is connected to the hydrogen generation unit. The oxygen synthesis tower 6 is respectively connected to a pure water pipeline and an oxygen cooler 7. The oxygen cooler 7 is respectively connected to an oxygen-water separator 10, an oxygen-side drainer 12, a chilled water pipeline I 37 and a chilled water pipeline II 38. The oxygen-water separator 10 is connected to an oxygen storage tank. The oxygen-water separator 10 is a vertical container. The function of the oxygen-side drainer 12 is to collect the condensate water of the oxygen cooler 7 and the sewage of the oxygen-water separator 10. The feed port II of the oxygen-alkali separator 8 is connected to the electrolytic cell 34. The mixture of oxygen and alkali liquor enters the oxygen-alkali separator 8 through the feed port II to separate oxygen and alkali liquor. The gas outlet II and the water replenishment port II of the oxygen-alkali separator 8 are connected to the oxygen synthesis tower 6. The separated hydrogen enters the oxygen synthesis tower 6. An oxygen-side liquid level transmitter 26 and an oxygen-side pressure transmitter 27 are arranged on the oxygen-alkali separator 8. An oxygen-side regulating valve 24 is arranged between the oxygen-water separator 10 and the oxygen storage tank. An exhaust port II is arranged on the oxygen-water separator 10, and an oxygen-side safety valve 25 is arranged on the exhaust port II to ensure the safety of the water electrolysis hydrogen production process when the oxygen pipeline is blocked. An oxygen-side regulating valve 24 is arranged on the pipeline where the qualified oxygen produced by the oxygen-water separator 10 enters the oxygen storage tank. The oxygen-side regulating valve 24 adjusts the opening of the oxygen-side regulating valve 24 according to the signal collected by the oxygen-side pressure transmitter 27 of the oxygen-alkali separator 8 to ensure the system pressure of the electrolytic hydrogen production process.

[0033] Embodiment 2

[0034] Such as Figure 7As shown, on the basis of Embodiment 1, the hydrogen synthesis tower 5 and the oxygen synthesis tower 6 have the same structure, both including a tower body 28. A gas outlet III 33 is provided at the top of the tower body 28. A water replenishment inlet 29 and a water replenishment outlet 30 are provided on the side wall of the tower body 28. An air inlet channel 31 is provided inside the tower body 28. One end of the air inlet channel 31 extends out of the side wall of the tower body 28, and the other end of the air inlet channel 31 is arranged below the water replenishment inlet 29. Through this setting, hydrogen and oxygen can be washed, and the caustic solution can be basically washed away, greatly reducing the caustic solution content in the gas, reducing alkaline corrosion, reducing the consumption of the caustic solution, and effectively using pure water at the same time. On the one hand, the pure water replenishes water for the electrolytic cell, and on the other hand, it washes the oxygen and hydrogen gases. A wire mesh demister 32 is provided inside the tower body 28, and the wire mesh demister 32 is arranged above the air inlet channel 31. A liquid level transmitter 39 is provided on the tower body 28. The liquid level transmitter 39 is used to interlock and stop the water replenishment pump of the water replenishment system when the pure water liquid level in the hydrogen synthesis tower 5 and the oxygen synthesis tower 6 is too high; the gas outlet III 33 of the hydrogen synthesis tower 5 is connected to the hydrogen cooler 4, the water replenishment outlet 30 of the hydrogen synthesis tower 5 is connected to the water replenishment port I, the water replenishment inlet 29 of the hydrogen synthesis tower 5 is connected to the pure water pipeline, and the air inlet channel 31 of the hydrogen synthesis tower 5 is connected to the gas outlet I. Similarly, the gas outlet III 33 of the oxygen synthesis tower 6 is connected to the oxygen cooler 7, the water replenishment outlet 30 of the oxygen synthesis tower 6 is connected to the water replenishment port II, the water replenishment inlet 29 of the oxygen synthesis tower 6 is connected to the pure water pipeline, and the air inlet channel 31 of the oxygen synthesis tower 6 is connected to the gas outlet II.

[0035] As Figure 2 , Figure 3 and Figure 4 shown, the frame includes an upper frame 14 and a lower frame 15. Ear plates I 18 are provided at the four corners of the bottom of the upper frame 14. Ear plates II 19 are provided at the top of the lower frame 15. The ear plates I 18 and the ear plates II 19 correspond one by one and are connected by bolts. A caustic solution cooler A 1, a caustic solution cooler B 2, and a caustic solution circulation pump 13 are provided on the inner bottom of the lower frame 15. A hydrogen side drainer 11 and an oxygen side drainer 12 are provided at the inner top of the lower frame 15. A cross beam 40 is provided in the middle of the upper frame 14. A hydrogen alkali separator 3, a hydrogen synthesis tower 5, an oxygen synthesis tower 6, and an oxygen alkali separator 8 are provided at the bottom of the upper frame 14. A hydrogen water separator 9 and an oxygen water separator 10 are provided on the cross beam 40. A hydrogen cooler 4 and an oxygen cooler 7 are provided at the top of the upper frame 14.

[0036] Embodiment 3

[0037] As Figure 5 and Figure 6As shown in the figure, on the basis of Embodiment 2, convex positioning blocks 17 are provided at a set of diagonals at the bottom of the upper frame 14, and concave positioning blocks 16 are provided at a set of diagonals at the top of the lower frame 15. The convex positioning blocks 17 cooperate with the concave positioning blocks 16. During installation, the convex positioning blocks 17 welded at the diagonal positions of the bottom beam of the upper frame 14 and the concave positioning blocks 16 welded at the corresponding positions of the lower frame 15 are used for positioning. Two unit transports are installed, and then the flanges of the pipelines between the upper frame 14 and the lower frame 15 are installed in place. Finally, the bolts between the ear plate I 18 and the ear plate II 19 are assembled and fixed. The installation is convenient, time-saving, and the installation efficiency is improved.

[0038] The gas pipeline and the water pipeline between the upper frame 14 and the lower frame 15 are connected by flanges. During transportation, the flanges of the pipelines between the upper frame 14 and the lower frame 15 and the bolts between the ear plate I 18 and the ear plate II 19 are removed, and it can be divided into two unit transports. The number of transport units is small, the transport cost is low, the disassembly is simple, the labor is saved, and the transport efficiency is improved.

[0039] The working process of the novel alkaline water electrolysis hydrogen production device of the present invention is as follows: The lye circulation pump 13 makes the lye pass through the lye cooler A1, the lye cooler B2, the electrolytic cell 34, the hydrogen-alkali separator 3 and the oxygen-alkali separator 8 to form a lye circulation loop. The mixture of hydrogen and lye enters the hydrogen-alkali separator 3 through the feed port I, and the hydrogen and the lye are separated by gravity. The separated hydrogen enters the hydrogen comprehensive tower 5. The discharge port I of the hydrogen-alkali separator 3 is communicated with the discharge port II of the oxygen-alkali separator 8 and then connected to the inlet of the lye circulation pump 13. The separated lye enters the lye circulation loop. The balance port I of the hydrogen-alkali separator 3 is communicated with the balance port II of the oxygen-alkali separator 8, which plays a role in balancing the internal pressures of the hydrogen-alkali separator 3 and the oxygen-alkali separator 8. The hydrogen enters the hydrogen cooler 4 for cooling after being washed by the hydrogen comprehensive tower 5 and then enters the hydrogen-water separator 9. After separation, it enters the hydrogen storage tank for storage. Similarly, the oxygen also has the same process.

Claims

1. A novel alkaline water electrolysis hydrogen production device, characterized in that, it includes a frame, an alkaline solution circulation pump (13) is arranged on the frame, the outlet of the alkaline solution circulation pump (13) is connected to an alkaline solution cooler, the alkaline solution cooler is respectively connected to an electrolytic cell (34), a cooling water pipeline I (35), and a cooling water pipeline II (36), and the electrolytic cell (34) is respectively connected to a hydrogen production unit and an oxygen production unit.

2. The novel alkaline water electrolysis hydrogen production device according to claim 1, characterized in that, the alkaline solution cooler includes an alkaline solution cooler A (1) and an alkaline solution cooler B (2), the alkaline solution cooler A (1) is provided with an alkaline solution inlet I, an alkaline solution outlet I, a cooling water inlet I, and a cooling water outlet I, and the alkaline solution cooler B (2) is provided with an alkaline solution inlet II, an alkaline solution outlet II, a cooling water inlet II, and a cooling water outlet II; the alkaline solution inlet I is connected to the alkaline solution circulation pump (13), the alkaline solution outlet I is connected to the alkaline solution inlet II, the alkaline solution inlet II is connected to the electrolytic cell (34), the cooling water inlet I is connected to the cooling water pipeline II (36), the cooling water outlet I is connected to the cooling water pipeline I (35), the cooling water inlet II is connected to the cooling water pipeline II (36), and the cooling water outlet II is connected to the cooling water pipeline I (35).

3. The novel alkaline water electrolysis hydrogen production device according to claim 2, characterized in that, the hydrogen production unit includes a hydrogen-alkali separator (3), the hydrogen-alkali separator (3) is provided with a feed inlet I, a gas outlet I, a discharge outlet I, a water replenishment inlet I, and a balance port I, the feed inlet I is connected to the electrolytic cell (34), both the gas outlet I and the water replenishment inlet I are connected to a hydrogen synthesis tower (5), the discharge outlet I is connected to the alkaline solution circulation pump (13), the balance port I is connected to the oxygen production unit, the hydrogen synthesis tower (5) is respectively connected to a pure water pipeline and a hydrogen cooler (4), and the hydrogen cooler (4) is respectively connected to a hydrogen-water separator (9), a hydrogen-side drainer (11), a refrigeration water pipeline I (37), and a refrigeration water pipeline II (38), and the hydrogen-water separator (9) is connected to a hydrogen storage tank.

4. The novel alkaline water electrolysis hydrogen production device according to claim 3, characterized in that, the oxygen production unit includes an oxygen-alkali separator (8), the oxygen-alkali separator (8) is provided with a feed inlet II, a gas outlet II, a discharge outlet II, a water replenishment inlet II, and a balance port II, the feed inlet II is connected to the electrolytic cell (34), both the gas outlet II and the water replenishment inlet II are connected to an oxygen synthesis tower (6), the discharge outlet II is connected to the alkaline solution circulation pump (13), the balance port II is connected to the hydrogen production unit, the oxygen synthesis tower (6) is respectively connected to a pure water pipeline and an oxygen cooler (7), and the oxygen cooler (7) is respectively connected to an oxygen-water separator (10), an oxygen-side drainer (12), a refrigeration water pipeline I (37), and a refrigeration water pipeline II (38), and the oxygen-water separator (10) is connected to an oxygen storage tank.

5. The novel alkaline water electrolysis hydrogen production device according to claim 4, characterized in that, The hydrogen synthesis tower (5) and the oxygen synthesis tower (6) have the same structure, both including a tower body (28). A gas outlet III (33) is provided at the top of the tower body (28). A water replenishment inlet (29) and a water replenishment outlet (30) are provided on the side wall of the tower body (28). An air inlet channel (31) is provided inside the tower body (28). One end of the air inlet channel (31) extends out of the side wall of the tower body (28), and the other end of the air inlet channel (31) is arranged below the water replenishment inlet (29). A wire mesh demister (32) is provided inside the tower body (28), and the wire mesh demister (32) is arranged above the air inlet channel (31). A liquid level transmitter (39) is provided on the tower body (28).

6. The novel alkaline water electrolysis hydrogen production device according to claim 4, characterized in that, a hydrogen-side liquid level transmitter (23) is provided on the hydrogen-alkali separator (3). A hydrogen-side regulating valve (21) is provided between the hydrogen water separator (9) and the hydrogen storage tank. An exhaust port I is provided on the hydrogen water separator (9), and a hydrogen-side safety valve (22) is provided on the exhaust port I.

7. The novel alkaline water electrolysis hydrogen production device according to claim 5, characterized in that, an oxygen-side liquid level transmitter (26) and an oxygen-side pressure transmitter (27) are provided on the oxygen-alkali separator (8). An oxygen-side regulating valve (24) is provided between the oxygen water separator (10) and the oxygen storage tank. An exhaust port II is provided on the oxygen water separator (10), and an oxygen-side safety valve (25) is provided on the exhaust port II.

8. The novel alkaline water electrolysis hydrogen production device according to claim 5, characterized in that, the frame includes an upper frame (14) and a lower frame (15). Ear plates I (18) are provided at the four corners of the bottom of the upper frame (14). Ear plates II (19) are provided at the top of the lower frame (15). The ear plates I (18) and the ear plates II (19) correspond one by one and are connected by bolts. An alkali liquid cooler A (1), an alkali liquid cooler B (2), and an alkali liquid circulation pump (13) are provided on the inner bottom of the lower frame (15). A hydrogen-side drainer (11) and an oxygen-side drainer (12) are provided at the inner top of the lower frame (15). A cross beam (40) is provided in the middle of the upper frame (14). A hydrogen-alkali separator (3), a hydrogen synthesis tower (5), an oxygen synthesis tower (6), and an oxygen-alkali separator (8) are provided at the bottom of the upper frame (14). A hydrogen water separator (9) and an oxygen water separator (10) are provided on the cross beam (40). A hydrogen cooler (4) and an oxygen cooler (7) are provided at the top of the upper frame (14).

9. The novel alkaline water electrolysis hydrogen production device according to claim 5, characterized in that, convex positioning blocks (17) are provided at a set of diagonals at the bottom of the upper frame (14), and concave positioning blocks (16) are provided at a set of diagonals at the top of the lower frame (15). The convex positioning blocks (17) cooperate with the concave positioning blocks (16).

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