Integrated cooling, separating and washing device and system for producing hydrogen by electrolyzing water

Abstract

The invention discloses an integrated cooling, separating and washing device for hydrogen production through water electrolysis. The integrated cooling, separating and washing device comprises an alkali liquor cooling module, a hydrogen cooling module, a hydrogen washing module, an oxygen cooling module and an oxygen washing module. The hydrogen cooling module and the oxygen cooling module comprise a gas cooling end plate, a plurality of gas cooling water plates and gas runner plates, the gas cooling water plates and the gas runner plates are arranged at intervals, and hydrogen / oxygen containing alkali liquor enters the gas runner plates from the gas cooling end plate, is cooled through the gas cooling water plates on the side and then enters the hydrogen washing module and the oxygen washing module; the hydrogen washing module and the oxygen washing module comprise washing partition plates and a plurality of gas washing plates, and cooled hydrogen / oxygen containing alkali liquor enters the gas washing plates through the washing partition plates to be washed and then flows out; the alkali liquor cooling module comprises alkali liquor partition plates, a plurality of alkali liquor runner plates and alkali liquor cooling water plates, wherein the alkali liquor runner plates and the alkali liquor cooling water plates are arranged between the alkali liquor partition plates at intervals, and alkali liquor of the electrolytic bath enters the alkali liquor runner plates, is cooled through the alkali liquor cooling water plates on the sides and then flows out.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production by water electrolysis, and in particular to an integrated cooling, separation and washing device and system for hydrogen production by water electrolysis. Background Art

[0002] The working principle of the water electrolysis hydrogen production system is a water electrolysis cell composed of a pair of electrodes immersed in an electrolyte and separated by a diaphragm to prevent gas penetration. When a certain direct current is passed through, water decomposes, hydrogen is released at the cathode, and oxygen is released at the anode.

[0003] The raw water of the water electrolysis reaction is constantly consumed, and the impurity ions in the electrolyte are constantly accumulated. At the same time, corrosion will occur during the operation of the alkaline electrolysis hydrogen production equipment to produce impurity ions and insoluble small particles. The higher the concentration of impurity ions in the electrolyte, the lower the efficiency of the electrolysis reaction. It will also affect the service life of the parts of the electrolysis hydrogen production equipment. Therefore, after the electrolysis hydrogen production equipment has been running for a period of time, if the impurity concentration exceeds a certain range, the hydrogen production equipment needs to be stopped and the electrolyte replaced to ensure the high efficiency and long life of the electrolytic cell.

[0004] In order to solve the above problems, the patent application document with application number 202310885483.7 discloses an alkaline water electrolysis hydrogen production system and a water electrolysis hydrogen production method, including an electrolyzer, an oxygen side gas-liquid separation device, a hydrogen side gas-liquid separation device, an ion purification device and a solid impurity filter; the electrolyte outlet of the oxygen side gas-liquid separation device or the electrolyte outlet of the hydrogen side gas-liquid separation device is connected to the ion purification device, and a bypass pipe is provided on one side of the ion purification device; when water is electrolyzed to produce hydrogen, the electrolyte enters the bypass pipe; when the electrolyte is purified, the electrolyte enters the ion purification device.

[0005] The above technical solution removes and filters the impurity ions in the electrolyte by setting up an ion purification device, reduces the impact of impurities on the electrolysis reaction, improves the performance of the electrolyzer, reduces the cost of hydrogen production by electrolysis of water, and increases the life of the electrolysis hydrogen production equipment.

[0006] However, the above technical solution is equipped with hydrogen / oxygen / alkaline liquid coolers, hydrogen / oxygen gas-liquid separators, scrubbers and other equipment to achieve the above functions. The number of equipment is large, and multiple sets of pipelines need to be set up between the equipment, which occupies a large space and has high manufacturing and maintenance costs, which is not conducive to system miniaturization and integration.

[0007] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Summary of the invention

[0008] The object of the present invention is to provide an integrated cooling, separation and washing device and system for producing hydrogen by electrolyzing water, so as to solve the problems existing in the prior art.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions:

[0010] An integrated cooling, separation and washing device for producing hydrogen by electrolyzing water, comprising an alkaline solution cooling module, and a hydrogen cooling module, a hydrogen washing module, an oxygen cooling module and an oxygen washing module symmetrically arranged on both sides of the alkaline solution cooling module;

[0011] The hydrogen cooling module and the oxygen cooling module are arranged on the outside, and include a gas cooling end plate, a plurality of gas cooling water plates and a gas flow channel plate arranged at intervals. Hydrogen / oxygen containing alkali liquid enters the gas flow channel plate from the gas cooling end plate and enters the hydrogen scrubbing module and the oxygen scrubbing module after being cooled by the gas cooling water plates on the side.

[0012] The hydrogen scrubbing module and the oxygen scrubbing module are arranged on the inner side, and include a scrubbing baffle and a plurality of gas scrubbing plates. The cooled hydrogen / oxygen containing alkaline solution enters the gas scrubbing plate through the scrubbing baffle and flows out after being scrubbed.

[0013] The alkali liquid cooling module includes an alkali liquid partition, and a plurality of alkali liquid flow channel plates and alkali liquid cooling water plates arranged at intervals between two partitions. The alkali liquid of the electrolytic cell enters the alkali liquid flow channel plate and flows out after being cooled by the alkali liquid cooling water plates on the side.

[0014] Furthermore, the gas cooling end plate is arranged at the outermost side, and a cooling water outlet, a gas inlet, a cooling water inlet and a drain outlet are arranged on the gas cooling end plate;

[0015] The cooling water outlet and the cooling water inlet are used to introduce cooling water into the gas cooling water plate, the gas inlet is used to introduce hydrogen / oxygen containing alkali liquid into the gas flow channel plate, and the drain port is used to discharge the liquefied alkali liquid.

[0016] Furthermore, the gas cooling water plate is provided with a gas cooling water outlet, a first gas inlet, a first gas outlet, a gas cooling water inlet and a first water collecting tank;

[0017] The gas cooling water inlet is used to communicate with the cooling water inlet of the gas cooling end plate. A plurality of first diversion blocks are provided below the gas cooling water inlet, and a plurality of cooling water flow channels are provided below the first diversion blocks. The bottom of the cooling water flow channel is connected through a plurality of step-distributed baffles, and the outlet end of the cooling water flow channel is connected with the cooling water outlet of the gas cooling end plate through the gas cooling water outlet; the first water collecting trough is provided at the bottom of the gas cooling water plate and is connected with the drain port of the gas cooling end plate.

[0018] Furthermore, the gas flow channel plate is provided with a gas cooling water outlet, a gas inlet, a gas outlet, a gas cooling water inlet and a second water collecting tank;

[0019] The gas inlet is connected with the gas inlet of the gas cooling end plate, a plurality of second diverter blocks are provided below the gas inlet, a plurality of Z-shaped flow channels are provided below the second diverter blocks, a plurality of V-shaped baffles are provided at the bottom of the Z-shaped flow channels, an outlet end of the Z-shaped flow channel is connected with the gas inlet of the next gas flow channel plate through the gas outlet, a second water collecting trough is provided below the V-shaped baffle and is connected with the first water collecting trough of the gas cooling water plate.

[0020] Furthermore, the washing baffle is arranged on the inner side of the hydrogen cooling module and the oxygen cooling module, and a gas outlet connected to the gas outlet of the gas flow channel plate is opened on the washing baffle.

[0021] Furthermore, a plurality of the gas washing plates are arranged on the inner side of the washing partition plate, and a gas washing outlet and a gas washing inlet are opened on the top of the gas washing plate;

[0022] A plurality of third diversion blocks are provided below the gas washing outlet and the gas washing inlet, and a plurality of washing flow channels are provided below the third diversion blocks. The outlets of the washing flow channels are connected to a water storage tank filled with pure water, and are used to dissolve trace alkali liquid vapor remaining in the gas in the pure water in the water storage tank to complete the gas washing. The washed gas flows out from the gas washing outlet by bubbling.

[0023] Furthermore, several of the gas washing plates are stacked and respectively constitute a hydrogen washing module and an oxygen washing module together with the washing partitions on the side; a first pure water inlet, a second pure water inlet, a first pure water outlet and a second pure water outlet are respectively provided on the sides of the hydrogen washing module and the oxygen washing module; a hydrogen outlet and an oxygen outlet are respectively provided on the bottom surfaces of the hydrogen washing module and the oxygen washing module.

[0024] Furthermore, the alkali liquid partition is arranged on the inner side of the gas washing plate, and a plurality of alkali liquid flow channel plates and alkali liquid cooling water plates are stacked and arranged, and together with the gas washing plate on the side, form an alkali liquid cooling module; the top surface of the alkali liquid cooling module is provided with an alkali liquid cooling water outlet, an alkali liquid inlet, an alkali liquid outlet and an alkali liquid cooling water inlet;

[0025] The electrolytic cell alkali enters the alkali cooling module through the alkali inlet, enters the alkali flow channel plate through the alkali plate inlet, and is distributed to the alkali flow channel through the fourth diversion block. The electrolytic cell alkali exchanges heat with the cooling water in the alkali cooling water plate arranged laterally in the alkali flow channel, flows out from the alkali plate outlet, and is collected to the alkali outlet of the alkali partition plate;

[0026] The alkali liquid cooling water enters the alkali liquid cooling module through the alkali liquid cooling water inlet, enters the alkali liquid cooling water plate through the alkali liquid cooling water inlet, is distributed to the alkali liquid cooling water flow channel through the fifth diversion block, exchanges heat with the electrolytic cell alkali liquid in the alkali liquid flow channel plate, flows out from the alkali liquid cooling water outlet, and flows out of the alkali liquid cooling module through the alkali liquid cooling water outlet.

[0027] A system of an integrated cooling separation washing device, comprising an electrolytic cell, an integrated cooling separation washing device, a chiller, a water tank, a water pump, a valve group and a PLC controller;

[0028] The lye in the lye water tank enters the electrolytic cell and produces hydrogen and oxygen under the action of electric current;

[0029] Hydrogen and oxygen containing alkali liquid and water vapor enter the hydrogen cooling module and oxygen cooling module respectively, and most of the alkali liquid vapor is liquefied and stored in the water collection tank through heat exchange with cooling water; the cooled hydrogen and oxygen enter the hydrogen washing module and oxygen washing module respectively, and the alkali liquid contained in the hydrogen and oxygen is further removed by washing with pure water, and then leave the integrated cooling separation washing device, and finally enter the back-end purification system through the solenoid valve, one-way valve, and filter;

[0030] When the alkali solution temperature in the electrolytic cell is too high, the alkali solution is discharged from the electrolytic cell and enters the alkali solution cooling module, where the temperature of the alkali solution is reduced by heat exchange with cooling water and finally returned to the electrolytic cell.

[0031] In summary, the present invention has the following beneficial effects:

[0032] While cooling the hydrogen, oxygen and alkali solution, the alkali solution contained in the hydrogen and oxygen is preliminarily separated, and then further washed and removed with pure water. It has the advantages of high integration, small size, low cost and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the integrated cooling, separation and washing device described in the present invention.

[0034] Figure 2 It is an exploded view of the integrated cooling, separation and washing device described in the present invention.

[0035] Figure 3 Schematic diagram of a gas cooled end plate according to the present invention.

[0036] Figure 4 Schematic diagram of the gas cooling water plate of the present invention.

[0037] Figure 5 Schematic diagram of the gas flow channel plate of the present invention.

[0038] Figure 6 Schematic diagram of the washing partition described in the present invention.

[0039] Figure 7 Schematic diagram of the gas scrubbing plate of the present invention.

[0040] Figure 8Schematic diagram of the cooling baffle of the present invention.

[0041] Fig. 9 It is a schematic diagram of the alkali solution flow channel plate described in the present invention.

[0042] Fig.10 It is a schematic diagram of the alkali solution cooling water plate described in the present invention.

[0043] Fig.11 It is a schematic diagram of the integrated cooling, separation and washing system described in the present invention. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0045] like Figures 1 to 10 As shown, the present invention proposes an integrated cooling, separation and washing device for producing hydrogen by electrolyzing water, comprising an alkaline solution cooling module, and a hydrogen cooling module, a hydrogen washing module, an oxygen cooling module and an oxygen washing module symmetrically arranged on both sides of the alkaline solution cooling module;

[0046] The hydrogen cooling module and the oxygen cooling module are arranged on the outside, and include a gas cooling end plate 1, a plurality of gas cooling water plates 2 and a gas flow channel plate 3 arranged at intervals. Hydrogen / oxygen containing alkali liquid enters the gas flow channel plate 3 from the gas cooling end plate 1 and enters the hydrogen scrubbing module and the oxygen scrubbing module after being cooled by the gas cooling water plate 2 on the side.

[0047] The hydrogen scrubbing module and the oxygen scrubbing module are arranged on the inner side, and include a scrubbing baffle 4 and a plurality of gas scrubbing plates 10. The cooled hydrogen / oxygen containing alkaline solution enters the gas scrubbing plate 10 through the scrubbing baffle 4 and flows out after being scrubbed.

[0048] The alkali liquid cooling module includes an alkali liquid partition 5, and a plurality of alkali liquid flow channel plates 6 and alkali liquid cooling water plates 7 arranged at intervals between the two partitions. The alkali liquid of the electrolytic cell enters the alkali liquid flow channel plate 6 and flows out after being cooled through the alkali liquid cooling water plates 7 on the side.

[0049] The gas cooling end plate 1 is arranged at the outermost side, and is provided with a cooling water outlet 11, a gas inlet 12, a cooling water inlet 14 and a drain outlet 15;

[0050] The cooling water outlet 11 and the cooling water inlet 14 are used to introduce cooling water into the gas cooling water plate 2, the gas inlet 12 is used to introduce hydrogen / oxygen containing alkali liquid into the gas flow channel plate 3, and the drain port 15 is used to discharge the liquefied alkali liquid.

[0051] The gas cooling water plate 2 is provided with a gas cooling water outlet 21, a first gas inlet 22, a first gas outlet 23, a gas cooling water inlet 24 and a first water collecting tank 28;

[0052] The gas cooling water inlet 24 is used to communicate with the cooling water inlet 14 of the gas cooling end plate 1. A plurality of first diverter blocks 25 are provided below the gas cooling water inlet 24. A plurality of cooling water flow channels 26 are provided below the first diverter blocks 25. The bottom of the cooling water flow channel 26 is connected through a plurality of step-distributed baffles 27. The outlet end of the cooling water flow channel 26 is connected with the cooling water outlet 11 of the gas cooling end plate 1 through the gas cooling water outlet 21. The first water collecting trough 28 is provided at the bottom of the gas cooling water plate 2 and is connected with the drain port 15 of the gas cooling end plate 1.

[0053] The gas flow channel plate 3 is provided with a gas cooling water outlet 31, a gas inlet 32, a gas outlet 33, a gas cooling water inlet 34 and a second water collecting tank 38;

[0054] The gas inlet 32 ​​is connected to the gas inlet 12 of the gas cooling end plate 1, and a plurality of second diverter blocks 35 are provided below the gas inlet 32, and a plurality of Z-shaped flow channels 36 are provided below the second diverter blocks 35. A plurality of V-shaped baffles 37 are provided at the bottom of the Z-shaped flow channel 36. The outlet end of the Z-shaped flow channel 36 is connected to the gas inlet 32 ​​of the next gas flow channel plate 3 through the gas outlet 33. The second water collecting trough 38 is provided below the V-shaped baffle 37 and is connected to the first water collecting trough 28 of the gas cooling water plate 2.

[0055] The washing baffle 4 is arranged inside the hydrogen cooling module and the oxygen cooling module, and a gas outlet 43 communicating with the gas outlet 33 of the gas flow channel plate 3 is opened on the washing baffle 4 .

[0056] A plurality of gas washing plates 10 are arranged on the inner side of the washing partition plate 4, and a gas washing outlet 102 and a gas washing inlet 103 are opened on the top of the gas washing plate 10;

[0057] A plurality of third diverter blocks 105 are provided below the gas washing outlet 102 and the gas washing inlet 103, and a plurality of washing channels 106 are provided below the third diverter blocks 105. The outlets of the washing channels 106 are connected to a water storage tank 107 filled with pure water, and are used to dissolve trace amounts of alkaline liquid vapor remaining in the gas in the pure water of the water storage tank 107 to complete gas washing. The washed gas flows out from the gas washing outlet 102 by bubbling.

[0058] A plurality of the gas washing plates 10 are stacked and respectively form a hydrogen washing module and an oxygen washing module together with the washing partitions 4 on the side. A first pure water inlet 92, a second pure water inlet 95, a first pure water outlet 93 and a second pure water outlet 96 are respectively provided on the sides of the hydrogen washing module and the oxygen washing module. A hydrogen outlet 91 and an oxygen outlet 94 are respectively provided on the bottom surfaces of the hydrogen washing module and the oxygen washing module.

[0059] The alkali liquid partition plate 5 is arranged on the inner side of the gas washing plate 10, and a plurality of alkali liquid flow channel plates 6 and alkali liquid cooling water plates 7 are stacked and arranged, and together with the gas washing plate 10 on the side, form an alkali liquid cooling module; the top surface of the alkali liquid cooling module is provided with an alkali liquid cooling water outlet 81, an alkali liquid inlet 82, an alkali liquid outlet 83 and an alkali liquid cooling water inlet 84;

[0060] The electrolytic cell alkali enters the alkali cooling module through the alkali inlet 82, enters the alkali flow channel plate 6 through the alkali plate inlet 62, and is distributed to the alkali flow channel 66 through the fourth diverter block 65. The electrolytic cell alkali exchanges heat with the cooling water in the alkali cooling water plate 7 arranged laterally in the alkali flow channel 66, flows out from the alkali plate outlet 63, and is collected to the alkali outlet 83 of the alkali partition plate 5.

[0061] The alkali liquid cooling water enters the alkali liquid cooling module through the alkali liquid cooling water inlet 84, enters the alkali liquid cooling water plate 7 through the alkali liquid cooling water inlet 74, is distributed to the alkali liquid cooling water flow channel 76 through the fifth diversion block 75, and after heat exchange with the electrolytic cell alkali liquid in the alkali liquid flow channel plate 6, flows out from the alkali liquid cooling water outlet 71, and flows out of the alkali liquid cooling module through the alkali liquid cooling water outlet 84.

[0062] See also Fig.11 , a system of an integrated cooling separation and washing device, including an electrolytic cell, an integrated cooling separation and washing device (hereinafter referred to as the device), a chiller, a water tank, a water pump, a valve group, a PLC controller, etc.

[0063] The alkali liquid in the alkali water tank enters the electrolytic cell through the water pump P1 and the one-way valve N1, and produces hydrogen and oxygen under the action of electric current.

[0064] Hydrogen with a large amount of alkali liquid vapor enters the device cooling module from the gas inlet 1-2-2, and most of the alkali liquid vapor is liquefied and stored in the water collection tank through cooling and heat exchange. The cooled hydrogen enters the washing module, and the alkali liquid vapor contained in the gas is further removed by washing with pure water, and then leaves the device through the gas outlet 9-4. It enters the purification system at the back end through the solenoid valve S6, the one-way valve N6, and the filter F2. A temperature sensor T1 is provided between the gas outlet 9-4 and the solenoid valve S6 and is connected to the PLC. If the outlet temperature is detected to be too high, the PLC will send a signal to control the solenoid valve S6 to reverse the direction so that the hydrogen flows to the one-way valve N4 and enters the gas inlet 1-2-2 for cooling again.

[0065] Oxygen with a large amount of alkali liquid vapor enters the cooling module of the device through the gas inlet 1-2-1, and most of the alkali liquid vapor is liquefied and stored in the water collection tank through cooling and heat exchange. The cooled oxygen enters the washing module, and the alkali liquid vapor contained in the gas is further removed by washing with pure water, and then leaves the device through the gas outlet 9-1. It enters the purification system at the back end through the solenoid valve S5, the one-way valve N5, and the filter F1. A temperature sensor T2 is set between the gas outlet 9-1 and the solenoid valve S5 and connected to the PLC. If the outlet temperature is detected to be too high, the PLC will send a signal to control the solenoid valve S5 to change direction so that the oxygen flows to the one-way valve N7 and enters the gas inlet 1-2-1 for cooling again.

[0066] Drain ports 1-5-2 and 1-5-2 are provided on the gas cooling end plate 1 of the gas cooling module of the device, and are connected to the waste water tank through pipelines. Liquid level gauges L1 and L2 are provided in the waste water tank to monitor the liquid level in the tank in real time. When the liquid level reaches the specified height, the signal is fed back to the PLC, and the solenoid valves S1 and S3 are opened to drain the liquid through the PLC.

[0067] If the temperature of the alkali solution in the electrolytic cell is too high, it will seriously affect the efficiency of electrolytic hydrogen production. In order to control the temperature of the alkali solution in the cell, it needs to be cooled. After being discharged from the electrolytic cell, the alkali solution enters the alkali solution cooling module of the device through the alkali solution inlet 8-2. After sufficient heat exchange and cooling with the alkali solution cooling water, it flows out from the alkali solution outlet 8-3 and returns to the alkali solution water tank.

[0068] Driven by the cooling water pump P2, the cooling water enters the gas cooling module and alkali liquid cooling module of the device from the gas cooling water inlet 1-4-1, gas cooling water inlet 1-4-2 and alkali liquid cooling water inlet 8-4 respectively, and after sufficient heat exchange with hydrogen, oxygen and alkali liquid respectively, flows out of the device from the gas cooling water outlet 1-1-1, gas cooling water outlet 1-1-2 and alkali liquid cooling water outlet 8-1 and returns to the chiller. A mass flow meter FM1 is set between the cooling water pump P and the device inlet for real-time monitoring of the cooling water flow.

[0069] The pure water in the pure water tank, driven by the pure water pump P3 and the pure water pump P4, flows through the one-way valve N2 and the one-way valve N3 respectively, and enters the hydrogen washing module and the oxygen washing module of the device through the pure water inlet 9-5 and the pure water inlet 9-2 respectively. The trace alkali liquid vapor remaining in the hydrogen and oxygen is dissolved in the pure water, and is discharged from the device through the pure water outlet 9-6 and the pure water outlet 9-3 and enters the pure water tank. The pure water tank is respectively provided with pH meters PH1 and PH2 and connected to the PLC to monitor the pH value in the water tank in real time. When the pH value exceeds the specified value, the PLC controls the solenoid valve S2 and the solenoid valve S4 to open and drain the water, and then the solenoid valve changes the flow direction to replenish the pure water in the water tank to the specified liquid level.

[0070] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0071] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An integrated cooling, separation and washing device for producing hydrogen by electrolysis of water, characterized in that: It includes an alkali liquid cooling module, and a hydrogen cooling module, a hydrogen washing module, an oxygen cooling module and an oxygen washing module which are symmetrically arranged on both sides of the alkali liquid cooling module; The hydrogen cooling module and the oxygen cooling module are arranged on the outside, and include a gas cooling end plate (1), a plurality of gas cooling water plates (2) arranged at intervals, and a gas flow channel plate (3). Hydrogen / oxygen containing alkaline liquid enters the gas flow channel plate (3) from the gas cooling end plate (1) and is cooled by the gas cooling water plate (2) at the side before entering the hydrogen scrubbing module and the oxygen scrubbing module. The hydrogen scrubbing module and the oxygen scrubbing module are arranged on the inner side, and include a scrubbing baffle (4) and a plurality of gas scrubbing plates (10). The cooled hydrogen / oxygen containing alkaline solution enters the gas scrubbing plate (10) through the scrubbing baffle (4) and flows out after being scrubbed. The alkali liquid cooling module comprises an alkali liquid partition (5), and a plurality of alkali liquid flow channel plates (6) and alkali liquid cooling water plates (7) arranged at intervals between two partitions. The alkali liquid of the electrolytic cell enters the alkali liquid flow channel plate (6) and flows out after being cooled through the alkali liquid cooling water plates (7) on the side.

2. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The gas cooling end plate (1) is arranged at the outermost side, and a cooling water outlet (11), a gas inlet (12), a cooling water inlet (14) and a drain outlet (15) are provided on the gas cooling end plate (1); The cooling water outlet (11) and the cooling water inlet (14) are used to introduce cooling water into the gas cooling water plate (2), the gas inlet (12) is used to introduce hydrogen / oxygen containing alkali liquid into the gas flow channel plate (3), and the drain outlet (15) is used to discharge the liquefied alkali liquid.

3. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 2, characterized in that: The gas cooling water plate (2) is provided with a gas cooling water outlet (21), a first gas inlet (22), a first gas outlet (23), a gas cooling water inlet (24) and a first water collecting tank (28); The gas cooling water inlet (24) is used to communicate with the cooling water inlet (14) of the gas cooling end plate (1); a plurality of first flow dividers (25) are provided below the gas cooling water inlet (24); a plurality of cooling water flow channels (26) are provided below the first flow dividers (25); the bottom of the cooling water flow channels (26) are connected via a plurality of step-distributed baffles (27); the outlet end of the cooling water flow channel (26) is connected to the cooling water outlet (11) of the gas cooling end plate (1) via the gas cooling water outlet (21); and the first water collecting trough (28) is provided at the bottom of the gas cooling water plate (2) and is connected to the drain port (15) of the gas cooling end plate (1).

4. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 3, characterized in that: The gas flow channel plate (3) is provided with a gas cooling water outlet (31), a gas inlet (32), a gas outlet (33), a gas cooling water inlet (34) and a second water collecting tank (38); The gas inlet (32) is connected to the gas inlet (12) of the gas cooling end plate (1), a plurality of second flow dividers (35) are provided below the gas inlet (32), a plurality of Z-shaped flow channels (36) are provided below the second flow dividers (35), a plurality of V-shaped baffles (37) are provided at the bottom of the Z-shaped flow channels (36), the outlet end of the Z-shaped flow channels (36) is connected to the gas inlet (32) of the next gas flow channel plate (3) through the gas outlet (33), and the second water collecting trough (38) is provided below the V-shaped baffle (37) and is connected to the first water collecting trough (28) of the gas cooling water plate (2).

5. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 4, characterized in that: The washing baffle (4) is arranged on the inner side of the hydrogen cooling module and the oxygen cooling module, and a gas outlet (43) communicating with the gas outlet (33) of the gas flow channel plate (3) is opened on the washing baffle (4).

6. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 5, characterized in that: A plurality of gas washing plates (10) are arranged on the inner side of the washing partition plate (4), and a gas washing outlet (102) and a gas washing inlet (103) are provided on the top of the gas washing plate (10); A plurality of third flow dividers (105) are provided below the gas washing outlet (102) and the gas washing inlet (103), and a plurality of washing channels (106) are provided below the third flow dividers (105). The outlets of the washing channels (106) are connected to a water storage tank (107) filled with pure water, and are used to dissolve trace amounts of alkaline liquid vapor remaining in the gas in the pure water in the water storage tank (107) to complete gas washing. The washed gas flows out from the gas washing outlet (102) in a bubbling manner.

7. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 6, characterized in that: A plurality of the gas washing plates (10) are stacked and respectively form a hydrogen washing module and an oxygen washing module together with the washing partitions (4) on the side. A first pure water inlet (92), a second pure water inlet (95), a first pure water outlet (93) and a second pure water outlet (96) are respectively provided on the side surfaces of the hydrogen washing module and the oxygen washing module. A hydrogen outlet (91) and an oxygen outlet (94) are respectively provided on the bottom surfaces of the hydrogen washing module and the oxygen washing module.

8. The integrated cooling, separation and washing device for producing hydrogen by electrolysis of water according to claim 7, characterized in that: The alkali liquid partition plate (5) is arranged on the inner side of the gas washing plate (10), and a plurality of alkali liquid flow channel plates (6) and alkali liquid cooling water plates (7) are stacked and arranged to form an alkali liquid cooling module with the gas washing plate (10) on the side; the top surface of the alkali liquid cooling module is provided with an alkali liquid cooling water outlet (81), an alkali liquid inlet (82), an alkali liquid outlet (83) and an alkali liquid cooling water inlet (84); The electrolytic cell alkali enters the alkali cooling module through the alkali inlet (82), enters the alkali flow channel plate (6) through the alkali plate inlet (62), and is distributed to the alkali flow channel (66) through the fourth diversion block (65). The electrolytic cell alkali exchanges heat with the cooling water in the alkali cooling water plate (7) arranged laterally in the alkali flow channel (66), then flows out from the alkali plate outlet (63) and is collected at the alkali outlet (83) of the alkali partition plate (5); The alkali liquid cooling water enters the alkali liquid cooling module through the alkali liquid cooling water inlet (84), enters the alkali liquid cooling water plate (7) through the alkali liquid cooling water inlet (74), is distributed to the alkali liquid cooling water flow channel (76) through the fifth diversion block (75), exchanges heat with the electrolytic cell alkali liquid in the alkali liquid flow channel plate (6), flows out through the alkali liquid cooling water outlet (71), and flows out of the alkali liquid cooling module through the alkali liquid cooling water outlet (84).

9. A system having the integrated cooling, separation and washing device according to claim 8, characterized in that: It includes an electrolytic cell, an integrated cooling separation and washing device, a chiller, a water tank, a water pump, a valve group and a PLC controller; The lye in the lye water tank enters the electrolytic cell and produces hydrogen and oxygen under the action of electric current; Hydrogen and oxygen containing alkali liquid and water vapor enter the hydrogen cooling module and oxygen cooling module respectively, and most of the alkali liquid vapor is liquefied and stored in the water collection tank through heat exchange with cooling water; the cooled hydrogen and oxygen enter the hydrogen washing module and oxygen washing module respectively, and the alkali liquid contained in the hydrogen and oxygen is further removed by washing with pure water, and then leave the integrated cooling separation washing device, and finally enter the back-end purification system through the solenoid valve, one-way valve, and filter; When the alkali solution temperature in the electrolytic cell is too high, the alkali solution is discharged from the electrolytic cell and enters the alkali solution cooling module, where the temperature of the alkali solution is reduced by heat exchange with cooling water and finally returned to the electrolytic cell.

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