Hydrogen recovery device based on electrochemical water desalination system

Abstract

The invention relates to a hydrogen recovery device based on an electrochemical water desalination system, and belongs to the field of hydrogen recovery, the hydrogen recovery device comprises a rack, a recovery mechanism for purifying and recovering hydrogen generated by electrochemical water desalination is arranged on the inner wall of the left side of the rack, and a waste heat mechanism for performing heat energy treatment on compressed air is arranged on the outer side of the recovery mechanism. According to the hydrogen recovery device based on the electrochemical water desalination system and the recovery mechanism, efficient recovery and purification of hydrogen generated in the electrochemical water desalination process are achieved, the utilization rate of the hydrogen is increased, the hydrogen is purified to be high in purity, in addition, the hydrogen is compressed to be in a high-pressure state and stored, a stable hydrogen source is provided for a hydrogen fuel cell, and the hydrogen recovery efficiency is improved. The PEM fuel battery pack in the power generation assembly utilizes the high-purity hydrogen and oxygen to generate electrochemical reaction to generate electric energy for users to use, so that the dependence on traditional energy is reduced, the energy cost is reduced, the environmental pollution is reduced, and the utilization of clean energy is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen recovery, and in particular to a hydrogen recovery device based on an electrochemical water desalination system. Background Art

[0002] Electrochemical desalination is a technology that uses electrochemical principles to remove dissolved salts and other impurities in water. It is mainly used in seawater desalination, brackish water desalination and industrial wastewater treatment. This method can effectively convert high-salt water into fresh water to meet the needs of drinking water, agricultural irrigation or industrial water.

[0003] As disclosed in Chinese Patent Publication No. (CN113493239A), an electrochemical treatment device, a seawater desalination system and a method are provided, which relate to the field of water treatment. The electrochemical treatment device includes an electrolytic cell, a power supply, and a first electrode group and a second electrode group. In the first electrode group, the first anode includes a dimensionally stable anode (DSA electrode), and the first cathode includes a titanium electrode. After the power is turned on, the anode directly oxidizes the organic matter and can generate active chlorine, active oxygen and other strong oxidizing substances online, which can effectively sterilize, kill algae, destroy large molecular organic matter, and reduce membrane surface pollution. In the second electrode group, the second anode / second cathode includes an iron electrode or an aluminum electrode, which can generate iron ions or aluminum ions and other ions with complexing effects online, which are hydrolyzed and polymerized into a series of multi-nuclear hydroxyl complexes and hydroxides, which flocculate with suspended matter and pollutants in the water to remove the pollutants. At the same time, the flocculent material can form a filter cake layer on the membrane surface to further reduce membrane pollution.

[0004] However, the prior art such as the above-mentioned patent disclosure still has the problem of poor efficiency in recycling the hydrogen generated in the electrochemical desalination process. In the process of electrochemistry for seawater desalination, brackish water desalination, industrial high-purity water, and capacitive deionization, charged electrodes are used to adsorb ions in the water to remove dissolved solids in the water. This method usually forms a capacitor structure between two electrodes, and controls the adsorption and release of ions by adjusting the voltage, which will produce hydrogen, oxidation and chlorine. The current electrochemical desalination water treatment production process does not recycle the generated hydrogen and other gases. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a hydrogen recovery device based on an electrochemical desalination water system, which has the advantages of good hydrogen recovery and utilization effect, and solves the problem of poor efficiency in the recovery and utilization of hydrogen generated in the electrochemical desalination process in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a hydrogen recovery device based on an electrochemical desalination water system, comprising a frame, a recovery mechanism for purifying and recovering hydrogen generated by electrochemical desalination water is provided on the left inner wall of the frame, and a waste heat mechanism for performing thermal energy treatment on compressed air is provided on the outer side of the recovery mechanism;

[0007] The recovery mechanism includes an air-water separator fixed to the left inner wall of the frame, the left and right sides of the top of the air-water separator are respectively connected with an air-water mixed liquid pipe and an external drainage pipe, a piston pump is fixed to the back wall of the inner cavity of the frame, an air supply pipe connected to the air-water separator is fixed to the input end of the piston pump, a separation purifier is provided on the back wall of the frame cavity and located on the right side of the piston pump, and a first air pipe is connected between the separation purifier and the output end of the piston pump, a hydrogen compressor is fixed to the middle of the inner wall of the frame, a second air pipe connected to the air outlet end of the separation purifier is fixed to the air inlet end of the hydrogen compressor, a high-pressure storage tank is fixed to the inner top wall of the frame, and a high-pressure air pipe connected to the air outlet end of the hydrogen compressor is fixed to the air inlet end of the high-pressure storage tank, and a power generation component for recovering hydrogen for power generation is provided at the air outlet end of the high-pressure storage tank;

[0008] The waste heat mechanism includes a collecting box fixed on the outside of the high-pressure air pipe, a spiral heat absorption tube is set on the outside of the high-pressure air pipe and inside the collecting box, the top of the spiral heat absorption tube is connected to a water supply pipe, and the bottom of the spiral heat absorption tube is connected to a drain pipe, a hot water storage tank is fixed on the outside of the frame, a circulating pump is fixed on the outside of the hot water storage tank, and the water outlet of the circulating pump is connected to the bottom end of the water supply pipe, a water pump is fixed on the outside of the hot water storage tank, the water inlet end of the water pump is connected to a water pumping pipe whose other end passes through and extends into the hot water storage tank, and the water outlet end of the water pump is connected to a water outlet pipe.

[0009] Furthermore, a controller is provided on the outside of the frame, and cabinet doors are hinged on both the left and right sides of the frame.

[0010] Furthermore, a regulating valve is fixed on the outer side of the first air pipe.

[0011] Furthermore, one-way valves are fixed to the outer sides of the gas-water mixed liquid pipe and the external drainage pipe, and the top ends of the gas-water mixed liquid pipe and the external drainage pipe penetrate and extend to the outer side of the frame.

[0012] Furthermore, connection holes are provided at both left and right ends of the collection box, and the collection box is fixed to the outside of the high-pressure air pipe through the two connection holes.

[0013] Furthermore, the bottom end of the water discharge pipe penetrates and extends to the inner top wall of the hot water storage tank, and a fixing bracket is fixed between the hot water storage tank and the side opposite to the frame.

[0014] Furthermore, the water inlet end of the circulation pump is connected to a cold water inlet pipe, and a high thermal conductivity film is wound around the outer side of the spiral heat absorption tube.

[0015] Furthermore, the power generation assembly includes a hydrogen exhaust pipe connected to the gas outlet end of the high-pressure storage tank, a power generation battery group is fixed to the right inner wall of the frame, and the top of the power generation battery group is connected to the bottom end of the hydrogen exhaust pipe, and an oxygen supply fan is fixed to the back wall of the inner cavity of the frame, and the air outlet end of the oxygen supply fan is fixed with an oxygen supply pipe connected to the bottom end of the power generation battery group.

[0016] Furthermore, a pressure relief valve is fixed on the outside of the hydrogen exhaust pipe, and a stop valve is fixed on the outside of the hydrogen exhaust pipe and above the power generation battery group.

[0017] Furthermore, a control valve is fixed on the outer side of the oxygen supply pipe, and the power generation battery group is a PEM fuel cell group.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] 1. The hydrogen recovery device based on the electrochemical desalination system has a recovery mechanism that realizes efficient recovery and purification of hydrogen generated from the electrochemical desalination process, which not only improves the utilization rate of hydrogen, but also purifies it to a high purity. In addition, by compressing hydrogen to a high-pressure state and storing it, a stable hydrogen source is provided for hydrogen fuel cells. The PEM fuel cell group in the power generation component uses these high-purity hydrogen to undergo an electrochemical reaction with oxygen to generate electricity for users, which not only reduces dependence on traditional energy and reduces energy costs, but also reduces environmental pollution and promotes the use of clean energy.

[0020] 2. The hydrogen recovery device based on the electrochemical desalination water system, the waste heat mechanism realizes the effective recovery and utilization of the heat generated in the hydrogen compression process through the collection box, spiral heat absorption tube, hot water storage tank, circulation pump and water pump and other equipment, which not only improves the comprehensive utilization efficiency of energy, but also provides additional thermal energy resources for the system by converting waste heat into hot water, reduces energy waste, reduces the operating cost of the system, and improves the energy efficiency of the entire system. In addition, the coordinated use of the circulation pump and the water pump ensures the reliability of the hot water supply, which helps to reduce the dependence on traditional energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the recycling mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of a power generation assembly of the present invention;

[0024] Figure 4 It is a schematic diagram of the waste heat mechanism of the present invention;

[0025] Figure 5 It is a partial schematic diagram of the waste heat mechanism of the present invention.

[0026] In the figure: 1 frame, 2 recovery mechanism, 21 gas-water separator, 22 gas-water mixed liquid pipe, 23 external drainage pipe, 24 piston pump, 25 air supply pipe, 26 separation purifier, 27 first air pipe, 28 hydrogen compressor, 29 second air pipe, 210 high-pressure storage tank, 211 high-pressure air pipe, 3 waste heat mechanism, 31 collection box, 32 spiral heat absorption pipe, 33 water supply pipe, 34 drain pipe, 35 hot water storage tank, 36 circulation pump, 37 water pump, 38 water pump, 39 water outlet pipe, 310 cold water inlet pipe, 4 power generation component, 41 hydrogen discharge pipe, 42 power generation battery group, 43 oxygen supply fan, 44 oxygen supply pipe, 45 pressure relief valve, 46 stop valve, 47 control valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 In this embodiment, a hydrogen recovery device based on an electrochemical desalination water system includes a frame 1, and a recovery mechanism 2 for purifying and recovering hydrogen generated by electrochemical desalination water is provided on the left inner wall of the frame 1, and a waste heat mechanism 3 for performing thermal energy treatment on compressed air is provided on the outer side of the recovery mechanism 2.

[0029] In this embodiment, a controller is provided on the outside of the rack 1, and cabinet doors are hinged on both the left and right sides of the rack 1.

[0030] See also Figures 2 to 3In order to purify and recover the hydrogen generated by electrochemical desalination of water, the recovery mechanism 2 in this embodiment includes a gas-water separator 21 fixed to the inner wall on the left side of the frame 1. The gas-water mixture containing hydrogen and oxygen generated in the electrochemical desalination process is first introduced into the gas-water separator 21, and the gas-water separator 21 separates the gas and water. The left and right sides of the top of the gas-water separator 21 are respectively connected with a gas-water mixed liquid pipe 22 and an external drainage pipe 23. The gas-water separator 21 separates the gas and water, and the gas enters the next process, while the water is discharged through the external drainage pipe 23. A piston pump 24 is fixed to the back wall of the inner cavity of the frame 1, and the separated gas enters the piston pump 24, where the gas is compressed to 3.5Mpa. An air supply pipe 25 connected to the gas-water separator 21 is fixed to the input end of the piston pump 24. A separation A separation purifier 26 is provided, and a first air pipe 27 is connected between the separation purifier 26 and the output end of the piston pump 24. The compressed gas enters the separation purifier 26 through the first air pipe 27, where the hydrogen is further purified to a high purity. A hydrogen compressor 28 is fixed to the middle of the inner wall of the frame 1, and a second air pipe 29 connected to the outlet end of the separation purifier 26 is fixed to the air inlet end of the hydrogen compressor 28. A high-pressure storage tank 210 is fixed to the inner top wall of the frame 1, and a high-pressure air pipe 211 connected to the outlet end of the hydrogen compressor 28 is fixed to the air inlet end of the high-pressure storage tank 210. The purified hydrogen enters the hydrogen compressor 28 through the second air pipe 29, and the hydrogen is compressed to 35Mpa. The compressed hydrogen is stored in the high-pressure storage tank 210 and is ready for power generation. The outlet end of the high-pressure storage tank 210 is provided with a power generation component 4 for recovering hydrogen for power generation.

[0031] The power generation component 4 includes a hydrogen exhaust pipe 41 connected to the gas outlet end of the high-pressure storage tank 210. A power generation battery group 42 is fixed to the right inner wall of the frame 1, and the top of the power generation battery group 42 is connected to the bottom end of the hydrogen exhaust pipe 41. The hydrogen stored in the high-pressure storage tank 210 flows out through the hydrogen exhaust pipe 41, and the hydrogen exhaust pipe 41 guides the hydrogen to the power generation battery group 42. An oxygen supply fan 43 is fixed to the back wall of the inner cavity of the frame 1. An oxygen supply pipe 44 connected to the bottom end of the power generation battery group 42 is fixed to the air outlet end of the oxygen supply fan 43. In the power generation battery group 42, hydrogen reacts electrochemically with oxygen supplied through the oxygen supply pipe 44 to generate electrical energy.

[0032] Among them, a pressure relief valve 45 is fixed on the outside of the hydrogen exhaust pipe 41, a stop valve 46 is fixed on the outside of the hydrogen exhaust pipe 41 and above the power generation battery group 42, a control valve 47 is fixed on the outside of the oxygen supply pipe 44, and the oxygen supply fan 43 provides necessary oxygen to ensure the smooth electrochemical reaction of the fuel cell. The power generation battery group 42 is a PEM fuel cell group, and the electric energy generated by the power generation battery group 42 is output through the connected circuit for use by users.

[0033] In this embodiment, a regulating valve is fixed to the outside of the first air pipe 27, and a one-way valve is fixed to the outside of the gas-water mixed liquid pipe 22 and the external drainage pipe 23. The top ends of the gas-water mixed liquid pipe 22 and the external drainage pipe 23 penetrate and extend to the outside of the frame 1. A pressure relief valve 45 and a stop valve 46 are installed on the hydrogen exhaust pipe 41 to ensure the safety and controllability of the system. During the power generation process, the control valve 47 is used to adjust the oxygen flow in the oxygen supply pipe 44 to optimize the power generation efficiency.

[0034] It should be noted that the PEM fuel cell stack is a fuel cell system that uses a proton exchange membrane as an electrolyte. The PEM fuel cell is an efficient and environmentally friendly energy conversion device that can directly convert the chemical energy of hydrogen and oxygen into electrical energy.

[0035] See also Figures 4 to 5 In order to process the compressed air with heat energy, the waste heat mechanism 3 in this embodiment includes a collecting box 31 fixed on the outside of the high-pressure air pipe 211. A spiral heat absorption tube 32 is installed on the outside of the high-pressure air pipe 211 and inside the collecting box 31. The spiral heat absorption tube 32 is usually located on the outside of the high-pressure air pipe 211 so as to absorb the heat generated during the hydrogen compression process. The top of the spiral heat absorption tube 32 is connected to a water supply pipe 33, and the bottom of the spiral heat absorption tube 32 is connected to a water discharge pipe 34. A hot water storage tank 35 is fixed on the outside of the frame 1. When cold water flows in the spiral heat absorption tube 32, the high thermal conductivity film on the inner wall of the tube helps to improve the heat exchange efficiency, so that the cold water can absorb the heat generated during the compression and pressurization of hydrogen. This process helps to cool the hydrogen compression process and recycle the waste heat generated during the compression process. The cold water that has absorbed heat is converted into hot water, and then flows into the hot water storage tank 35 along the drain pipe 34 for temporary storage. A circulation pump 36 is fixed on the outside of the hot water storage tank 35, and the water outlet end of the circulation pump 36 is connected to the bottom end of the water supply pipe 33. The circulation pump 36 is started and starts to work. Its function is to extract cold water from the external water source and transport it to the system. The circulation pump 36 pumps the cold water along the water supply pipe 33 into the spiral heat absorption tube 32. A pumping pump 37 is fixed on the outside of the hot water storage tank 35. The water inlet end of the pumping pump 37 is connected to a pumping pipe 38 whose other end passes through and extends into the hot water storage tank 35. The water outlet end of the pumping pump 37 is connected to an outlet pipe 39. The hot water storage tank 35 is used to store hot water for subsequent use. When hot water is needed, the pumping pump 37 is started to pump the hot water out of the hot water storage tank 35.

[0036] In this embodiment, connection holes are provided at both ends of the collecting box 31, and the collecting box 31 is fixed to the outside of the high-pressure air pipe 211 through the two connection holes. The bottom end of the drain pipe 34 passes through and extends to the inner top wall of the hot water storage tank 35. A fixed bracket is fixed between the hot water storage tank 35 and the side opposite to the frame 1. The water inlet end of the circulating pump 36 is connected to the cold water inlet pipe 310. One end of the cold water inlet pipe 310 is connected to an external faucet or other water source to provide the required cold water for the system. A high thermal conductivity film is wrapped around the outer side of the spiral heat absorption tube 32.

[0037] It should be noted that when hot water is needed, the water pump 37 is started, and the water pump 37 pumps the hot water out of the hot water storage tank 35 and discharges it along the outlet pipe 39 for use outside the system. The hot water can be used for various purposes, such as domestic water heating, industrial process heating or other occasions requiring a heat source.

[0038] The working principle of the above embodiment is:

[0039] (1) The gas-water mixture containing hydrogen and oxygen generated during the electrochemical desalination process is first introduced into the gas-water separator 21, which separates the gas and water. The gas enters the next process, while the water is discharged through the external drain pipe 23. The separated gas enters the piston pump 24, where the gas is compressed to 3.5 MPa. The compressed gas enters the separation purifier 26 through the first gas pipe 27, where the hydrogen is further purified to a high purity. The purified hydrogen enters the hydrogen compressor 28 through the second gas pipe 29, where the hydrogen is compressed to 35 MPa. The compressed hydrogen is stored in the high-pressure storage tank 210 and is ready to be used for power generation. The hydrogen in the battery pack 42 flows out through the hydrogen exhaust pipe 41, and the hydrogen exhaust pipe 41 guides the hydrogen to the power generation battery pack 42. A PEM fuel cell pack is used here. In the power generation battery pack 42, the hydrogen reacts electrochemically with the oxygen supplied through the oxygen supply pipe 44 to generate electrical energy. The electrical energy generated by the power generation battery pack 42 is output through the connected circuit for use by the user. The oxygen supply fan 43 provides the necessary oxygen to ensure that the electrochemical reaction of the fuel cell proceeds smoothly. A pressure relief valve 45 and a stop valve 46 are installed on the hydrogen exhaust pipe 41 to ensure the safety and controllability of the system. During the power generation process, the control valve 47 is used to adjust the oxygen flow in the oxygen supply pipe 44 to optimize the power generation efficiency.

[0040] (2) One end of the cold water inlet pipe 310 is connected to an external faucet or other water source to provide the system with the required cold water. The circulation pump 36 is started and begins to work. Its function is to extract cold water from the external water source and transport it to the system. The circulation pump 36 pumps the cold water along the water supply pipe 33 to the spiral heat absorption pipe 32. The spiral heat absorption pipe 32 is usually located on the outside of the high-pressure gas pipe 211 so that it can absorb the heat generated during the hydrogen compression process. When the cold water flows in the spiral heat absorption pipe 32, the high thermal conductivity film on the inner wall of the pipe helps to improve the heat exchange efficiency, so that the cold water can absorb the hydrogen compression. The heat generated during the pressurization process helps to cool the hydrogen compression process and recycle the waste heat generated during the compression process. The cold water that has absorbed the heat is converted into hot water, and then flows into the hot water storage tank 35 along the drain pipe 34 for temporary storage. The hot water storage tank 35 is used to store hot water for subsequent use. When hot water is needed, the water pump 37 is started. The water pump 37 pumps the hot water out of the hot water storage tank 35 and discharges it along the outlet pipe 39 for use outside the system. The hot water can be used for a variety of purposes, such as domestic water heating, industrial process heating or other occasions requiring a heat source.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A hydrogen recovery device based on an electrochemical desalination water system, comprising a frame (1), characterized in that: The left inner wall of the frame (1) is provided with a recovery mechanism (2) for purifying and recovering hydrogen generated by electrochemical desalination of water, and the outer side of the recovery mechanism (2) is provided with a waste heat mechanism (3) for performing thermal energy treatment on compressed air; The recovery mechanism (2) comprises an air-water separator (21) fixed to the left inner wall of the frame (1); the left and right sides of the top of the air-water separator (21) are respectively connected to an air-water mixed liquid pipe (22) and an external drainage pipe (23); a piston pump (24) is fixed to the back wall of the inner cavity of the frame (1); an air supply pipe (25) connected to the air-water separator (21) is fixed to the input end of the piston pump (24); a separation purifier (26) is provided on the back wall of the cavity of the frame (1) and located on the right side of the piston pump (24); and the separation purifier (26) and the piston pump (2 A first air pipe (27) is connected between the output ends of the separation and purifier (26) and the output ends of the separation and purifier (26); a hydrogen compressor (28) is fixed in the middle of the inner wall of the frame (1); a second air pipe (29) connected to the outlet end of the separation and purifier (26) is fixed at the air inlet end of the hydrogen compressor (28); a high-pressure storage tank (210) is fixed to the inner top wall of the frame (1); a high-pressure air pipe (211) connected to the outlet end of the hydrogen compressor (28) is fixed at the air inlet end of the high-pressure storage tank (210); and a power generation component (4) for recovering hydrogen for power generation is provided at the outlet end of the high-pressure storage tank (210); The waste heat mechanism (3) comprises a collecting box (31) fixed on the outside of the high-pressure air pipe (211); a spiral heat absorption tube (32) is sleeved on the outside of the high-pressure air pipe (211) and inside the collecting box (31); the top end of the spiral heat absorption tube (32) is connected to a water supply tube (33), and the bottom end of the spiral heat absorption tube (32) is connected to a water discharge tube (34); a hot water storage tank (35) is fixed on the outside of the frame (1); a circulating pump (36) is fixed on the outside of the hot water storage tank (35), and the water outlet end of the circulating pump (36) is connected to the bottom end of the water supply tube (33); a water pump (37) is fixed on the outside of the hot water storage tank (35); the water inlet end of the water pump (37) is connected to a water pump (38) the other end of which passes through and extends into the inside of the hot water storage tank (35); and the water outlet end of the water pump (37) is connected to a water outlet tube (39).

2. A hydrogen recovery device based on an electrochemical desalination water system according to claim 1, characterized in that: A controller is provided on the outside of the frame (1), and cabinet doors are hinged on both the left and right sides of the frame (1).

3. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: A regulating valve is fixed on the outer side of the first air pipe (27).

4. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: One-way valves are fixed to the outsides of the gas-water mixed liquid pipe (22) and the external drainage pipe (23), and the top ends of the gas-water mixed liquid pipe (22) and the external drainage pipe (23) penetrate and extend to the outside of the frame (1).

5. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: The left and right ends of the collection box (31) are both provided with connection holes, and the collection box (31) is fixed to the outside of the high-pressure air pipe (211) through the two connection holes.

6. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: The bottom end of the water discharge pipe (34) penetrates and extends to the inner top wall of the hot water storage tank (35), and a fixing bracket is fixed between the hot water storage tank (35) and the side opposite to the frame (1).

7. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: The water inlet end of the circulation pump (36) is connected to a cold water introduction pipe (310), and a high thermal conductivity film is wound around the outer side of the spiral heat absorption tube (32).

8. The hydrogen recovery device based on the electrochemical desalination water system according to claim 1, characterized in that: The power generation assembly (4) comprises a hydrogen gas discharge pipe (41) connected to the gas outlet end of the high-pressure storage tank (210); a power generation battery group (42) is fixed to the right inner wall of the frame (1), and the top of the power generation battery group (42) is connected to the bottom end of the hydrogen gas discharge pipe (41); an oxygen supply fan (43) is fixed to the back wall of the inner cavity of the frame (1); and an oxygen supply pipe (44) connected to the bottom end of the power generation battery group (42) is fixed to the air outlet end of the oxygen supply fan (43).

9. A hydrogen recovery device based on an electrochemical desalination water system according to claim 8, characterized in that: A pressure relief valve (45) is fixed on the outside of the hydrogen exhaust pipe (41), and a stop valve (46) is fixed on the outside of the hydrogen exhaust pipe (41) and above the power generation battery group (42).

10. A hydrogen recovery device based on an electrochemical desalination water system according to claim 8, characterized in that: A control valve (47) is fixed on the outer side of the oxygen supply pipe (44), and the power generation battery group (42) is a PEM fuel cell group.

Images