Device and method for solar-driven high-salinity wastewater purification and green hydrogen production

Abstract

The application discloses a kind of solar-driven high-salinity wastewater purification collaborative green hydrogen production device, it is related to new energy and environmental protection technical field, including high-salinity wastewater treatment system, power supply system, interface evaporation system, electrolytic water system and condensate water collection system;Wherein, power supply system is interface evaporation system and electrolytic water system provide electric energy;Interface evaporation system receives solar energy and converts it into heat energy to evaporate high-salinity wastewater;Condensate water collection system mainly collects the condensate water formed after water vapor produced by evaporation condenses;Condensate water is then delivered to electrolytic water system as electrolysis raw material, and finally hydrogen and oxygen are produced after electrolytic water system electrolyzes condensate water.The solar-driven high-salinity wastewater purification collaborative green hydrogen production device of the application can efficiently utilize solar energy, high-concentration wastewater is treated by photo-thermal driving, and the pure water produced in this process is electrolyzed to produce clean fuel, with small footprint, high economic efficiency and strong applicability.

Description

Technical Field

[0001] This invention relates to the fields of new energy and environmental protection technology, and in particular to a device and method for solar-driven high-salt wastewater purification and green hydrogen production. Background Technology

[0002] With the rapid development of industrialization, the discharge of high-salinity wastewater (such as chemical, pharmaceutical, textile, and seawater desalination concentrated brine) has increased dramatically, and its treatment has become a major challenge. Traditional treatment methods, such as multi-effect evaporation and mechanical vapor recompression, are highly efficient, but they suffer from high energy consumption, high cost, and are prone to scaling and clogging, and do not meet the national energy conservation and emission reduction policy requirements.

[0003] Meanwhile, hydrogen energy, as a clean and efficient secondary energy source, is a key pathway to achieving the "dual carbon" goal. Currently, over 95% of hydrogen comes from fossil fuel reforming, a process accompanied by substantial carbon emissions. Producing "green hydrogen" through water electrolysis using renewable energy is an ideal approach, but the high cost of electricity consumption hinders its large-scale development.

[0004] Solar energy is the most widely distributed renewable energy source. Photovoltaic technology can directly convert solar energy into electricity, but its energy conversion efficiency is limited by spectral matching, and the generated electricity is intermittent. Solar thermal technology can efficiently utilize the broad spectrum of solar energy to generate heat and is often used in fields such as water evaporation and desalination. However, existing solar hydrogen production technologies typically simply connect photovoltaic power generation to an electrolyzer without fully considering system integration and energy cascade utilization, resulting in low overall solar energy utilization efficiency.

[0005] On the other hand, traditional water electrolysis systems require a large amount of electrical energy to heat the electrolyte to the operating temperature, resulting in significant electrothermal energy demands. If a low-temperature heat source generated by solar energy could replace this heat consumption, the electricity cost of hydrogen production would be greatly reduced, improving the overall economic efficiency of the system.

[0006] Therefore, developing a solar-driven device for the purification of high-salt wastewater and the production of green hydrogen, which can synergistically utilize the spectrum and thermal energy of solar energy, achieve complementary coupling of electricity and heat, and create a highly efficient integrated system for green hydrogen and fresh water, is of great significance for reducing the cost of green hydrogen and promoting the comprehensive utilization of renewable energy. Summary of the Invention

[0007] The purpose of this invention is to provide a solar-driven device and method for the synergistic production of green hydrogen from high-salt wastewater purification. This device can not only efficiently purify high-salt wastewater, but also use solar photovoltaic panels to provide electricity for the water electrolysis system and the high-salt wastewater treatment system. At the same time, it innovatively recovers and utilizes the low-temperature waste heat generated during the photothermal evaporation process to preheat the electrolyte, significantly reducing the energy consumption of the electrolysis process. It achieves multi-energy complementary coupling of solar energy "light-heat-electricity", and ultimately achieves the goal of efficient, economical and environmentally friendly synergistic production of green hydrogen and wastewater purification, solving the dual problems of high energy consumption in traditional high-salt wastewater treatment and high electricity consumption cost in green hydrogen preparation.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A solar-driven device for purifying high-salinity wastewater and producing green hydrogen includes a high-salinity wastewater treatment system, a power supply system, an interfacial evaporation system, a water electrolysis system, and a condensate collection system. The power supply system is electrically connected to the interfacial evaporation system and the water electrolysis system to provide them with electrical energy. The interfacial evaporation system is located within the high-salinity wastewater treatment system and receives solar energy, converting it into heat energy to evaporate the high-salinity wastewater. The condensate collection system is connected to the interfacial evaporation system and collects the condensate formed after the water vapor generated during evaporation condenses. Furthermore, the condensate collection system is connected to the water electrolysis system to supply the condensate as a feedstock for electrolysis. The water electrolysis system is configured to use electrical energy from the power supply system to electrolyze the condensate from the condensate collection system to produce hydrogen and oxygen.

[0009] Preferably, the high-salinity wastewater treatment system includes a closed treatment chamber and a storage tank. The storage tank is located in the treatment chamber, and a sewage inlet for connecting to the outside is provided on one side wall of the storage tank. High-salinity wastewater is injected into the storage tank for storage through the sewage inlet. The interface evaporation system includes a solar evaporation material and an electric heating device. The solar evaporation material is installed on the top of the storage tank and covers the water surface. The working end of the electric heating device is located in the storage tank and immersed in the high-salt wastewater. The other end of the electric heating device is fixed on the side wall of the treatment chamber and connected to the power supply system. The condensate collection system includes a condensing transparent glass and a condensate collector. The condensing transparent glass is assembled on the top of the treatment chamber. Solar energy passes through the condensing transparent glass and shines on the solar evaporation material. Water vapor condenses upon encountering the condensing transparent glass and collects in the condensate collector. The condensate in the condensate collector is pumped to the water electrolysis system through a water pump and transmission pipeline.

[0010] Preferably, the condensing and light-transmitting glass is tilted at an angle of 30° to 45°; the material of the condensing and light-transmitting glass is quartz glass with high thermal conductivity and high light transmittance.

[0011] Preferably, the solar evaporation material is a carbon-based photothermal material, including one or more of carbon nanotubes, biochar, and carbon black.

[0012] Preferably, a support frame or housing is arranged side by side on one side of the processing chamber, and the power supply system is located on the top of the support frame or housing, including solar photovoltaic panels, batteries and photovoltaic inverters, which are arranged from top to bottom and connected to the top of the support frame or housing.

[0013] Preferably, the water electrolysis system is placed inside the support frame or box and includes a gas generating device, a gas-liquid separation module, a gas drying module, and a gas storage device. The gas generating device is connected to the gas-liquid separation module, the gas drying module, and the gas storage device on both sides in sequence through pipes. The gas storage device includes an oxygen cylinder and a hydrogen cylinder, which are placed side by side at the bottom. The water inlet of the gas generating device is connected to the water outlet of the transmission pipe of the condensate collection system.

[0014] Preferably, the gas generation device includes a membrane electrode assembly and bipolar plates located on both sides thereon; the membrane electrode assembly includes an anode catalyst layer, a cathode catalyst layer, and an ion exchange membrane disposed between the two; an anode gas diffusion layer is provided on the outer side of the anode catalyst layer, and a cathode gas diffusion layer is provided on the outer side of the cathode catalyst layer; the bipolar plates are provided with an electrolyte inlet and an electrolyte outlet for supplying electrolyte to the membrane electrode assembly and discharging reaction products, wherein the electrolyte is condensate water transmitted from a condensate water collection system.

[0015] Preferably, the ion exchange membrane is a proton exchange membrane, model N115 or N117; the anode gas diffusion layer is titanium fiber paper, and the cathode gas diffusion layer is carbon paper.

[0016] Preferably, it also includes a corrosion-resistant Teflon gasket with a thickness of 0.5 mm. The Teflon gasket is disposed around the edge of the ion exchange membrane and is located between the bipolar plate and the anode gas diffusion layer and the cathode gas diffusion layer to provide sealing and electrical insulation.

[0017] A solar-driven method for the combined purification of high-salinity wastewater and the production of green hydrogen, employing the apparatus for the combined purification of high-salinity wastewater and the production of green hydrogen as described in any of the preceding methods, includes the following steps: S1. Wastewater injection and separation: High-salt wastewater enters the storage tank. Solar energy shines through the condensing transparent glass onto the surface of the solar evaporation material, converting it into heat energy and evaporating the wastewater to form water vapor. S2. Condensation occurs when water vapor condenses into liquid water upon contact with the condensing transparent glass, and the liquid water collects along the inclined condensing transparent glass into a condensate collector. S3, Power Conversion: Solar photovoltaic panels convert light energy into electrical energy, which is then regulated by a photovoltaic inverter and stored in a battery to power electric heating devices, water pumps, and water electrolysis systems. S4. Heating operation: The electric heating device heats the high-salt wastewater to a constant temperature to improve evaporation efficiency. S5. Condensate delivery: The water pump delivers the condensate to the gasification unit of the water electrolysis system. S6. Electrolysis gasification: The gasification device uses electrical energy to electrolyze condensed water to produce hydrogen and oxygen. S7. Gas separation and storage: The gas generated by electrolysis is separated by the gas-liquid separation module, the liquid is returned to the condensate collector, and the gas is dried by the gas drying module and then stored in the gas storage device.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention relates to a solar-driven device for purifying high-salinity wastewater and simultaneously producing green hydrogen. 1) This invention directly drives the water electrolysis system and electric heating device through photovoltaic power generation; while photothermal evaporation directly utilizes solar thermal energy to treat wastewater without secondary conversion, which greatly improves the overall utilization efficiency of solar energy. 2) The high-salt wastewater treatment system, condensate collection system and water electrolysis system are connected in series through pipelines and water pumps, so that the condensate produced after the high-salt wastewater is purified by evaporation is no longer discharged as a simple product, but is directly supplied as a raw material to the gasification unit to produce hydrogen. This realizes the "treatment-reuse-value-added" cycle of water resources, improves the wastewater recycling rate and saves resources. 3) An electric heating device is installed on the wastewater treatment side and works in conjunction with solar interface evaporation to preheat the temperature of the condensate entering the gasification unit, reducing the external energy consumption required to heat the electrolyte to the working temperature, thereby directly reducing the unit power consumption of hydrogen production and improving economic efficiency.

[0019] This invention relates to a solar-driven high-salt wastewater purification and green hydrogen production device that can efficiently utilize solar energy to treat high-concentration wastewater through photothermal drive. Simultaneously, the pure water produced in this process is electrolyzed to generate clean fuel. Compared with traditional high-salt wastewater treatment technologies, this invention has a smaller footprint, higher economic efficiency, and can provide clean fuel and a highly efficient wastewater treatment system for off-grid areas. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1This is a flowchart of the process of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is the left view of the present invention; Figure 4 This is a schematic diagram of the electrolytic water system of the present invention.

[0022] Explanation of reference numerals in the attached diagram: 1. Solar energy; 2. Condensing transparent glass; 3. Solar photovoltaic panel; 4. Battery; 5. Photovoltaic inverter; 6. Gas separation module; 7. Gas generation device; 8. Gas drying module; 9. Gas storage device; 10. Solar evaporation material; 11. High-salt wastewater; 12. Electric heating device; 13. Water pump; 14. Storage tank; 15. Sewage inlet; 16. Condensate collector; 21. Bipolar plate; 22. Anode gas diffusion layer; 23. Anode catalyst layer; 24. Ion exchange membrane; 25. Cathode catalyst layer; 26. Cathode gas diffusion layer; 27. Electrolyte inlet; 28. Electrolyte outlet. Detailed Implementation

[0023] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] like Figure 1-4As shown, a solar-driven device for purifying high-salinity wastewater and producing green hydrogen includes a high-salinity wastewater treatment system, a power supply system, an interfacial evaporation system, a water electrolysis system, and a condensate collection system. The power supply system is electrically connected to the interfacial evaporation system and the water electrolysis system to provide them with electrical energy. The interfacial evaporation system is located within the high-salinity wastewater treatment system and receives solar energy, converting it into heat energy to evaporate the high-salinity wastewater. The condensate collection system is connected to the interfacial evaporation system and collects the condensate formed after the water vapor generated during evaporation condenses. Furthermore, the condensate collection system is connected to the water electrolysis system to transport the condensate as a feedstock to the water electrolysis system. The water electrolysis system is configured to use electrical energy from the power supply system to electrolyze the condensate from the condensate collection system to produce hydrogen and oxygen. Specifically, the device is 2 meters long, 1 meter wide, and 1 meter high; its total footprint is only 2 square meters, giving it a small footprint advantage. All subsystems are compactly integrated into a single frame, overcoming the limitations of traditional high-salinity wastewater treatment plants (such as evaporation ponds) and centralized renewable energy hydrogen production facilities that require large land areas. This modular device can be deployed in off-grid or grid-vulnerable areas such as islands, remote mining areas, and coastal plants, enabling multi-product output. It not only purifies wastewater but also simultaneously produces high-value-added green hydrogen and oxygen, as well as reusable freshwater.

[0025] Specifically, the high-salinity wastewater treatment system includes a closed treatment chamber and a storage tank 14. The storage tank 14 is located in the treatment chamber, and a sewage inlet 15 for connecting to the outside is provided on one side wall of the storage tank 14. High-salinity wastewater 11 is injected into the storage tank 14 for storage through the sewage inlet 15. The interface evaporation system includes a solar evaporation material 10 and an electric heating device 12. The solar evaporation material 10 is installed on top of the storage tank 14 and covers the water surface. The working end of the electric heating device 12 is located in the storage tank 14 and is immersed in the high-salt wastewater 11. The other end of the electric heating device 12 is fixed on the side wall of the treatment chamber and connected to the power supply system. Specifically, the electric heating device 12 is one or more of an electric heating rod, a heat pump, and a heat pipe. Its purpose is to improve the efficiency of solar evaporation and accelerate the treatment speed of high-salt wastewater.

[0026] The condensate collection system includes a condensation-transparent glass 2 and a condensate collector 16. The condensation-transparent glass 2 is assembled on the top of the treatment chamber. The solar energy 1 shines on the solar evaporation material 10 after passing through the condensation-transparent glass 2. Water vapor condenses upon encountering the condensation-transparent glass 2 and collects in the condensate collector 16. The condensate in the condensate collector 16 is pumped to the electrolytic water system through a water pump 13 and a transmission pipeline.

[0027] like Figure 2 As shown, in a specific embodiment, the condensing transparent glass 2 is inclined at an angle of 30° to 45°; the condensing transparent glass 2 is made of quartz glass with high thermal conductivity and high light transmittance. The solar evaporation material 10 is a carbon-based photothermal material, including one or more of carbon nanotubes, biochar, and carbon black. Carbon-based photothermal materials have excellent photothermal conversion capabilities, which can convert solar energy into heat energy to heat and treat high-salt wastewater.

[0028] Specifically, a support frame or housing is arranged side-by-side on one side of the processing chamber. The power supply system is located on top of the support frame or housing and includes solar photovoltaic panels 3, batteries 4, and photovoltaic inverters 5. The solar photovoltaic panels 3, batteries 4, and photovoltaic inverters 5 are arranged from top to bottom and connected to the top of the support frame or housing. The solar photovoltaic panels 3 are commercial solar photovoltaic panels, which have advantages such as low cost, good environmental adaptability, and high power generation efficiency. The batteries 4 and photovoltaic inverters 5 are used to regulate and stabilize the voltage output by the solar photovoltaic panels 3, preventing excessive start-up and shutdown voltages during electrolysis from damaging the water electrolysis system.

[0029] like Figure 2 As shown, the water electrolysis system is placed inside the support frame or box, and includes a gas generator 7, a gas-liquid separation module 6, a gas drying module 8, and a gas storage device 9. The gas generator 7 is connected to the gas-liquid separation module 6, the gas drying module 8, and the gas storage device 9 on both sides via pipes. The gas storage device 9 includes an oxygen cylinder and a hydrogen cylinder, which are placed side by side at the bottom. The inlet of the gas generator 7 is connected to the outlet of the transmission pipe of the condensate collection system. During operation, the raw material in the water electrolysis system comes from the condensate produced by the high-salt wastewater treatment system. Under the voltage provided by the power supply system, the gas generator 7 converts electrical energy into chemical energy, causing hydrogen to be produced at the cathode and oxygen at the anode. The gas is then separated by the gas-liquid separation module 6, and the separated liquid flows back to the condensate collector 16. The separated humid gas is dried by the gas drying module 8 to obtain high-concentration dry gas, which is then stored in the gas storage device 9, i.e., hydrogen and oxygen are stored in their respective hydrogen and oxygen cylinders.

[0030] like Figure 4As shown, the gas generating device 7 includes a membrane electrode assembly and bipolar plates 21 located on both sides thereon; the membrane electrode assembly includes an anode catalyst layer 23, a cathode catalyst layer 25, and an ion exchange membrane 24 placed between the two; an anode gas diffusion layer 22 is provided on the outer side of the anode catalyst layer 23, and a cathode gas diffusion layer 26 is provided on the outer side of the cathode catalyst layer 25; the bipolar plates 21 are provided with an electrolyte inlet 27 and an electrolyte outlet 28 for supplying electrolyte to the membrane electrode assembly and discharging reaction products, wherein the electrolyte is condensate transported from a condensate collection system.

[0031] Specifically, the ion exchange membrane 24 is a proton exchange membrane, model N115 or N117; the anode gas diffusion layer 22 is titanium fiber paper, and the cathode gas diffusion layer 26 is carbon paper.

[0032] In addition, a corrosion-resistant Teflon gasket with a thickness of 0.5 mm is included. The Teflon gasket is disposed around the edge of the ion exchange membrane 24 and is located between the bipolar plate 21 and the anode gas diffusion layer 22 and the cathode gas diffusion layer 26 to provide sealing and electrical insulation.

[0033] A method for solar-driven high-salinity wastewater purification and green hydrogen production, employing the apparatus described above for solar-driven high-salinity wastewater purification and green hydrogen production, includes the following steps: S1. Wastewater injection and separation: High-salt wastewater 11 enters the regulating tank 14. Solar energy 1 shines through the condensing transparent glass 2 onto the surface of the solar evaporation material 10, converting it into heat energy and evaporating the wastewater to form water vapor. Specifically, the solar evaporation material 10 can quickly convert solar energy into heat energy to heat and evaporate the high-salt wastewater 11 that wets the surface of the solar evaporation material. S2. The generation of condensate: the high-salt wastewater 11 is heated and evaporated to form water vapor. The water vapor rises and comes into contact with the condensing transparent glass 2 and condenses into liquid water. The water is collected along the inclined condensing transparent glass 2 into the condensate collector 16. S3, Power conversion: Solar photovoltaic panel 3 converts light energy into electrical energy, which is then regulated by photovoltaic inverter 5 and stored in battery 4 to power electric heating device 12, water pump 13 and water electrolysis system. S4. Heating operation: The electric heating device 12 heats the high-salinity wastewater 11 to a constant temperature, improving evaporation efficiency. Specifically, the electric heating device 12 has a temperature control function, which can keep the water temperature of the high-salinity wastewater 11 constant at 40~80℃, improving the water treatment capacity of the high-salinity wastewater purification system. S5. Condensate delivery: Pump 13 delivers condensate to the gas generator 7 of the water electrolysis system. S6. Electrolysis gas production: Gas production device 7 uses electrical energy to electrolyze condensed water to produce hydrogen and oxygen. S7. Gas separation and storage: The gas generated by electrolysis is separated by the gas-liquid separation module 6, the liquid is returned to the condensate collector 16, and the gas is dried by the gas drying module 8 and then stored in the gas storage device 9.

[0034] Specifically, the basic principle of this invention is as follows: solar photovoltaic power generation is used to heat the interface evaporation material, which uses thermal energy to separate the solid and liquid of high-salt wastewater. The condensate is collected and used as raw material for the water electrolysis system, thereby electrolyzing the condensate into hydrogen and oxygen.

[0035] Meanwhile, the generated gas passes through the gas-liquid separation module 6 to separate the electrolyte and gas. The separated electrolyte flows back to the condensate collector 16, and the generated gas passes through the gas drying module 8 and is then stored in the gas storage device 9, thus completing the separation and storage of the gas.

[0036] In summary, this invention represents a multi-faceted and efficient utilization of solar energy. Specifically, solar photovoltaic panels convert light energy into electrical energy to power a high-salinity wastewater treatment system and a water electrolysis system. Simultaneously, an interfacial evaporation system directly converts solar energy into heat energy to drive the evaporation of high-salinity wastewater, achieving solid-liquid separation and wastewater purification. The device is compact, occupies a small area, and has a high degree of system integration. It can operate stably off-grid or in remote areas without external power grid support, simultaneously producing green hydrogen and purified freshwater, thus offering both good environmental benefits and economic viability.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A solar-driven device for purifying high-salinity wastewater and producing green hydrogen, characterized in that: The system includes a high-salinity wastewater treatment system, a power supply system, an interface evaporation system, a water electrolysis system, and a condensate collection system. The power supply system is electrically connected to the interface evaporation system and the water electrolysis system to provide them with electrical energy. The interface evaporation system is located within the high-salinity wastewater treatment system and receives solar energy, converting it into heat energy to evaporate the high-salinity wastewater. The condensate collection system is connected to the interface evaporation system and collects the condensate formed after the water vapor generated during evaporation condenses. Furthermore, the condensate collection system is connected to the water electrolysis system to transport the condensate as a feedstock to the water electrolysis system. The water electrolysis system is configured to use electrical energy from the power supply system to electrolyze the condensate from the condensate collection system to produce hydrogen and oxygen.

2. The solar-driven high-salinity wastewater purification and green hydrogen production device according to claim 1, characterized in that: The high-salt wastewater treatment system includes a closed treatment chamber and a storage tank (14). The storage tank (14) is located in the treatment chamber. A sewage inlet (15) for connecting to the outside is provided on one side wall of the storage tank (14). High-salt wastewater (11) is injected into the storage tank (14) for storage through the sewage inlet (15). The interface evaporation system includes a solar evaporation material (10) and an electric heating device (12). The solar evaporation material (10) is installed on the top of the storage tank (14) and covers the water surface. The working end of the electric heating device (12) is located in the storage tank (14) and immersed in the high-salt wastewater (11). The other end of the electric heating device (12) is fixed on the side wall of the treatment chamber and connected to the power supply system. The condensate collection system includes a condensate transparent glass (2) and a condensate collector (16). The condensate transparent glass (2) is assembled on the top of the processing chamber. The solar energy (1) shines on the solar evaporation material (10) after passing through the condensate transparent glass (2). Water vapor condenses after encountering the condensate transparent glass (2) and collects in the condensate collector (16). The condensate in the condensate collector (16) is pumped to the electrolytic water system through a water pump (13) and a transmission pipeline.

3. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 2, characterized in that: The condensing transparent glass (2) is tilted, with an tilt angle of 30°~45°; the material of the condensing transparent glass (2) is quartz glass with high thermal conductivity and high light transmittance.

4. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 2, characterized in that: The solar evaporation material (10) is a carbon-based photothermal material, including one or more of carbon nanotubes, biocarbon, and carbon black.

5. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 2, characterized in that: A support frame or box is arranged side by side on one side of the processing room. The power supply system is located on the top of the support frame or box and includes a solar photovoltaic panel (3), a storage battery (4) and a photovoltaic inverter (5). The solar photovoltaic panel (3), the storage battery (4) and the photovoltaic inverter (5) are arranged from top to bottom and connected to the top of the support frame or box.

6. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 5, characterized in that: The water electrolysis system is placed in the support frame or box and includes a gas generating device (7), a gas-liquid separation module (6), a gas drying module (8), and a gas storage device (9). The gas generating device (7) is connected to the gas-liquid separation module (6), the gas drying module (8), and the gas storage device (9) on both sides in sequence through pipes. The gas storage device (9) includes an oxygen cylinder and a hydrogen cylinder, which are placed side by side at the bottom. The water inlet of the gas generating device (7) is connected to the water outlet of the transmission pipe of the condensate collection system.

7. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 6, characterized in that: The gas generating device (7) includes a membrane electrode assembly and bipolar plates (21) located on both sides thereon. The membrane electrode assembly includes an anode catalyst layer (23), a cathode catalyst layer (25), and an ion exchange membrane (24) disposed between the two. An anode gas diffusion layer (22) is provided on the outside of the anode catalyst layer (23), and a cathode gas diffusion layer (26) is provided on the outside of the cathode catalyst layer (25). The bipolar plate (21) is provided with an electrolyte inlet (27) and an electrolyte outlet (28) for supplying electrolyte to the membrane electrode assembly and discharging reaction products. The electrolyte is condensate from the condensate collection system.

8. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 7, characterized in that: The ion exchange membrane (24) is a proton exchange membrane, model N115 or N117; the anode gas diffusion layer (22) is titanium fiber paper, and the cathode gas diffusion layer (26) is carbon paper.

9. The apparatus for solar-driven high-salinity wastewater purification and synergistic green hydrogen production according to claim 7, characterized in that: It also includes a corrosion-resistant Teflon gasket with a thickness of 0.5 mm, which is arranged around the edge of the ion exchange membrane (24) and between the bipolar plate (21) and the anode gas diffusion layer (22) and the cathode gas diffusion layer (26) to provide sealing and electrical insulation.

10. A method for solar-driven high-salinity wastewater purification and synergistic green hydrogen production, characterized in that, The apparatus for solar-driven high-salinity wastewater purification and green hydrogen production according to any one of claims 1-9 includes the following steps: S1. Wastewater injection and separation: High-salt wastewater (11) enters the storage tank (14). Solar energy (1) shines through the condensing transparent glass (2) onto the surface of the solar evaporation material (10), converting it into heat energy and evaporating the wastewater to form water vapor. S2. The generation of condensate: water vapor comes into contact with the condensing transparent glass (2) and condenses into liquid water, which is collected along the inclined condensing transparent glass (2) into the condensate collector (16); S3, power conversion: the solar photovoltaic panel (3) converts light energy into electrical energy, which is then regulated by the photovoltaic inverter (5) and stored in the battery (4) to power the electric heating device (12), water pump (13) and water electrolysis system. S4. Heating operation: The electric heating device (12) heats the high-salt wastewater (11) to a constant temperature to improve the evaporation efficiency; S5. Condensate delivery: The water pump (13) delivers the condensate to the gas generator (7) of the water electrolysis system. S6. Electrolysis gas production: The gas production device (7) uses electrical energy to electrolyze condensed water to produce hydrogen and oxygen. S7. Gas separation and storage: The gas generated by electrolysis is separated by the gas-liquid separation module (6), the liquid is returned to the condensate collector (16), and the gas is dried by the gas drying module (8) and then stored in the gas storage device (9).

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