Solar multi-functional utilization integrated device and method

Abstract

The application discloses a kind of solar multifunctional utilization integrated device and method, the device includes photo-thermal evaporation system, photocatalytic system and photovoltaic power generation system, wherein: photo-thermal evaporation system includes open vertical container, respectively setting in the upside and inner edge of vertical container inverted V-shaped glass structure and pure water collection tank, photo-thermal evaporation material is placed in vertical container, and sewage storage container and water storage container, the top of the glass structure is also provided with hydrogen collection port;Photocatalytic system includes shell reactor and built-in photocatalyst liquid storage tank, and the upper and lower sides of shell reactor are both light-transmitting glass;Photovoltaic power generation system provides power supply for the whole device, including solar photovoltaic panel and energy storage device, solar photovoltaic panel is set in the lower surface of the lower light-transmitting glass of shell reactor.The application realizes efficient hydrogen energy production and fresh water supply by multifunctional integration using sunlight, and realizes the comprehensive utilization of water resources.

Description

Technical Field

[0001] This invention belongs to the field of water resource treatment technology, specifically relating to an integrated device and method for multifunctional utilization of sunlight. Background Technology

[0002] Traditional wastewater treatment and seawater desalination processes suffer from drawbacks such as high energy consumption, complex equipment operation and maintenance, and secondary pollution caused by the use of chemical agents. In contrast, sunlight, as a renewable energy source, is highly sustainable. Related technologies such as photothermal, photocatalytic, and photovoltaic technologies are continuously advancing, and their cleanliness, high efficiency, and low cost make them promising candidates for water treatment.

[0003] Current methods for purifying wastewater or desalinating seawater using solar thermal technology rely on the heat energy of sunlight to heat water and generate steam. This pure steam is then collected and condensed into liquid water, separating water from pollutants or salts. While this technology can reduce energy consumption to some extent, it suffers from low light energy utilization and poor evaporation efficiency. Photocatalytic technology, which uses photocatalysts to decompose water into hydrogen and oxygen under sunlight, has poor hydrogen production efficiency in wastewater or seawater. The complex composition of wastewater or seawater severely affects the activity of photocatalysts, thus impacting the effectiveness of photocatalytic water splitting for hydrogen production. Furthermore, photovoltaic power generation can directly convert light energy into solar energy, but standalone photovoltaic panels require a large footprint. Therefore, finding a highly efficient and integrated water treatment device based on sunlight utilization is particularly important. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing an integrated device and method for multifunctional utilization of sunlight. This device first utilizes photothermal evaporation technology to evaporate and condense seawater or wastewater to obtain pure water. The collected pure water is used both as freshwater and for photocatalytic hydrogen production, thereby improving the photocatalytic hydrogen production efficiency. Simultaneously, photovoltaic power generation provides electricity for the entire device. This invention, through multifunctional integration, achieves efficient hydrogen production and freshwater supply using sunlight without the need for additional energy supply, realizing the comprehensive utilization of water resources.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The first aspect of the present invention is to provide an integrated device for multifunctional utilization of sunlight, comprising a photothermal evaporation system, a photocatalytic system, and a photovoltaic power generation system, wherein:

[0007] The photothermal evaporation system is used to process the solution to be evaporated to obtain pure water. It includes an open vertical container for holding the solution to be evaporated, an inverted V-shaped glass structure and a pure water collection tank respectively set above and on the inner edge of the vertical container, a photothermal evaporation material placed inside the vertical container, and a wastewater storage container and a water storage container respectively connected to the vertical container and the pure water collection tank. The top of the glass structure is also provided with a hydrogen collection port.

[0008] The photocatalytic system is used for photocatalytic hydrogen production from pure water, including a shell reactor and a storage tank with built-in photocatalyst. The upper and lower sides of the shell reactor are both transparent glass, and the top is provided with a first water inlet and a second water inlet, and the bottom is provided with a water outlet. The pure water collection tank is connected to the first water inlet, and the storage tank is connected to the second water inlet and the water outlet.

[0009] The photovoltaic power generation system is used to provide power to the photothermal evaporation system and the photocatalytic system, and includes solar photovoltaic panels and energy storage devices. The solar photovoltaic panels are installed on the lower surface of the light-transmitting glass on the lower side of the shell reactor.

[0010] In some embodiments, the glass structure includes an electrically heated glass on the light-facing side and a condensing glass on the backlight side, as well as triangular support structures located on the front and rear sides for supporting the electrically heated glass and the condensing glass; a sealing glass is also provided on the outer side of the support structure.

[0011] The electrothermal glass is powered by a photovoltaic power generation system; the inner side of the condensing glass is coated with a hydrophobic coating, the material of which is polydimethylsiloxane or a fluoropolymer.

[0012] In some embodiments, in the photothermal evaporation system, the tilt angle of the heating glass is 10°~70°, and the tilt angle of the condensing glass is 15°~45°.

[0013] In some embodiments, in the photothermal evaporation system, the area ratio of the photothermal evaporation material to the vertical container is 0.8:1 to 0.9:1, and the area ratio of the pure water collection tank to the vertical container is 0.1:1 to 0.2:1.

[0014] In some embodiments, the solution to be evaporated is seawater, industrial wastewater, or domestic sewage; the photothermal evaporation material is a three-dimensional porous graphene aerogel or a MOF material loaded on a lightweight hydrophobic substrate, wherein the MOF material has broad-spectrum absorption characteristics.

[0015] In some embodiments, the light-transmitting glass on the upper and lower sides of the shell reactor is quartz glass or ultra-clear glass with high light transmittance; the sidewall of the shell reactor is a reinforcing support mechanism, and several baffles are also provided inside it along the water flow direction, the baffles being arranged in parallel and staggered.

[0016] In some embodiments, the bottom of the shell reactor is further provided with an adjustable angle support device, which can be adjusted to change the tilt angle of the shell reactor. The tilt angle of the shell reactor is 10° to 70°, and the height to length ratio of the shell reactor is 1:40 to 1:50.

[0017] The photocatalyst in the storage tank is TiO2, CdS, or g-C3N4.

[0018] In some embodiments, the wastewater storage container is connected to the wastewater inlet and outlet of the vertical container to realize the circulation of the solution to be evaporated; a circulation pump is respectively installed on the connecting pipe between the wastewater storage container and the vertical container, and on the connecting pipe between the storage tank and the shell reactor, and the circulation pump is powered by a photovoltaic power generation system.

[0019] In some embodiments, the pure water collection tank is provided with a first pure water outlet communicating with a shell reactor and a second pure water outlet communicating with a water storage container, and in the vertical direction, the first pure water outlet is lower than the second pure water outlet; a first valve is provided on the connecting pipe between the first pure water outlet and the shell reactor; and a second valve is provided on the connecting pipe between the second pure water outlet and the water storage container.

[0020] A second aspect of the present invention is that a method for providing the above-mentioned integrated solar energy utilization device is provided, comprising the following steps:

[0021] First, the photothermal evaporation material in the photothermal evaporation system uses the thermal energy in sunlight to cause the solution to evaporate into pure water. The pure water enters the shell reactor of the photocatalytic system as a raw material for hydrogen production in the photocatalytic reaction, and is also stored in a water storage container. Inside the shell reactor, the photocatalyst uses the light energy in sunlight to drive the pure water to undergo a photocatalytic reaction to generate hydrogen. At the same time, the photovoltaic power generation system integrated at the bottom of the shell reactor converts the light energy into electrical energy to power the entire device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The integrated solar energy utilization device of the present invention improves the stability of the photocatalyst and the utilization rate of sunlight by first evaporating and then photocatalyzing hydrogen production to treat sewage or seawater. Compared with the traditional sewage or seawater photocatalytic treatment method, the present invention takes into account the influence of impurity particles in sewage or seawater on the photocatalyst. It obtains pure water by evaporating sewage or seawater for pretreatment, and then uses pure water for photocatalytic hydrogen production. This removes the adverse effects of impurity particles in sewage on photocatalysis, improves the utilization efficiency of sunlight, and significantly improves the photocatalytic hydrogen production effect.

[0024] (2) In this invention, the light-facing side of the photothermal evaporation system is heated by electric heating glass, which heats the water vapor condensed on the inner surface of the electric heating glass, eliminates water mist caused by the temperature difference between the inner and outer surfaces of the glass, improves the penetration ability of sunlight, and enhances the photothermal evaporation effect.

[0025] (3) The photovoltaic power generation system in this invention supplies power to the entire device, such as the electric heating glass and the circulating pump, without requiring external additional energy input; and the solar photovoltaic panels in the photovoltaic power generation system are integrated into the bottom of the shell reactor of the photocatalytic system, without taking up additional space. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a multi-functional integrated solar energy utilization device.

[0027] Figure 2 This is a schematic diagram of the structure of a photothermal evaporation system.

[0028] Figure 3 This is a schematic diagram of the photocatalytic system.

[0029] Figure 4 This is a top view of an integrated device for multifunctional utilization of sunlight.

[0030] Figure 5 This is a partial structural diagram of an integrated device for multifunctional utilization of sunlight.

[0031] In the picture:

[0032] 100-Photothermal evaporation system; 101-Vertical container; 102-Glass structure; 103-Pure water collection tank; 104-Photothermal evaporation material; 105-Sewage storage container; 106-Water storage container; 107-Hydrogen collection port; 108-Electrically heated glass; 109-Condensing glass; 110-First pure water outlet; 111-Second pure water outlet; 112-First valve; 113-Second valve;

[0033] 200 - Photocatalytic system; 201 - Shell reactor; 202 - Storage tank; 203 - First inlet; 204 - Second inlet; 205 - Outlet; 206 - Baffle; 207 - Support device;

[0034] 300 - Photovoltaic power generation system; 301 - Solar photovoltaic panel. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order. Orientation descriptions such as "front and back" and "up and down" are relative to the referenced drawings and are only for the convenience of describing relative positional relationships, and are not a limitation on the actual usage posture, installation direction, or structural uniqueness of the device.

[0037] Example 1

[0038] like Figure 1 As shown, the integrated solar multifunctional utilization device of the present invention includes a photothermal evaporation system 100, a photocatalytic system 200, and a photovoltaic power generation system 300, wherein:

[0039] Combination Figure 2 As shown, the photothermal evaporation system 100 is used to process the solution to be evaporated to obtain pure water, including an open vertical container 101 for holding the solution to be evaporated, and an inverted V-shaped glass structure 102 (as shown) disposed above the vertical container 101. Figure 1 As shown, a pure water collection tank 103 is provided on the inner edge of the vertical container 101, a photothermal evaporation material 104 is placed inside the vertical container 101, and a sewage storage container 105 and a water storage container 106 are respectively connected to the vertical container 101 and the pure water collection tank 103. A hydrogen collection port 107 is also provided on the top of the glass structure 102.

[0040] In the photothermal evaporation system 100, the photothermal evaporation material 104 in the vertical container 101 floats at the interface of the solution to be evaporated. It uses the thermal energy of sunlight to promote the evaporation of seawater or sewage, thereby achieving efficient hydrothermal evaporation. After the water vapor condenses, it is collected in the pure water collection tank 103. The collected pure water can be used for photocatalytic reaction in the photocatalytic system 200 on the one hand, and can also be collected in the water storage container 106 on the other hand. The solution to be evaporated includes, but is not limited to, seawater, industrial wastewater and domestic sewage.

[0041] Combination Figure 3As shown, the photocatalytic system 200 is used for photocatalytic hydrogen production from pure water. It includes a tilted shell reactor 201 and a storage tank 202 containing a built-in photocatalyst. The shell reactor 201 has transparent glass on both the top and bottom. It has a first water inlet 203 and a second water inlet 204 at the top and a water outlet 205 at the bottom. The pure water collection tank 103 is connected to the first water inlet 203 to input pure water into the photocatalytic system 200. The storage tank 202 is connected to the second water inlet 204 and the water outlet 205 to input the photocatalyst into the shell reactor 201 and realize the circulation of the reaction liquid. The generated hydrogen gas has a relatively small molecular weight. It enters the photothermal evaporation system 100 from the first water inlet 203 at the top of the shell reactor 201 and is discharged and collected from the hydrogen collection port 107 at the top. The collected hydrogen gas can be introduced with a desiccant to remove the water vapor it carries.

[0042] The photovoltaic power generation system 300 is used to provide power to the photothermal evaporation system 100 and the photocatalytic system 200, including solar photovoltaic panels 301 (such as...). Figure 3 As shown in the figure, the solar photovoltaic panel 301 is installed on the lower surface of the light-transmitting glass on the lower side of the shell reactor 201 and overlaps with it. The integration of the solar photovoltaic panel 301 with the shell reactor 201 can reduce the floor space, and the pure water flowing in the shell reactor 201 can cool the solar photovoltaic panel 301. At the same time, the high temperature of the solar photovoltaic panel 301 can accelerate the photocatalytic decomposition reaction.

[0043] Back Figure 2 The aforementioned glass structure 102 includes an electric heating glass 108 on the light-facing side and a condensing glass 109 on the backlight side, as well as triangular support structures (not shown in the figure) located on the front and rear sides for supporting the electric heating glass 108 and the condensing glass 109. A sealing glass is also provided on the outside of the support structure.

[0044] The electric heating glass 108 is powered by the photovoltaic power generation system 300. When exposed to sunlight, the heating function of the electric heating glass 108 is activated to prevent water vapor generated during evaporation from condensing on the inner surface of the electric heating glass 108, which would cause scattering of incident light and reduce the evaporation efficiency of the photothermal evaporation system 100. The inner side of the condensing glass 109 is coated with a hydrophobic coating, the hydrophobic material being polydimethylsiloxane or a fluoropolymer, to accelerate the flow of condensate.

[0045] In the photothermal evaporation system 100, the tilt angle of the electric heating glass 108 is 10°~70°, and the tilt angle of the condensing glass 109 is 15°~45°. If the tilt angle of the condensing glass 109 is too small, the droplets will flow slowly, while if the tilt angle is too large, the droplets will fall off midway. By setting its tilt angle reasonably, it can be ensured that the droplets fall quickly into the pure water collection tank 103.

[0046] In addition, in the photothermal evaporation system 100, the area ratio of the photothermal evaporation material 104 to the vertical container 101 is 0.8:1 to 0.9:1, and the area ratio of the pure water collection tank 103 to the vertical container 101 is 0.1:1 to 0.2:1.

[0047] The photothermal evaporation material 104 is a three-dimensional porous graphene aerogel or a MOF material loaded on a lightweight hydrophobic substrate. Preferably, the MOF material has broad-spectrum absorption characteristics.

[0048] The upper and lower transparent glass of the aforementioned shell reactor 201 is made of quartz glass or ultra-clear glass with high light transmittance to enhance light transmittance; the sidewalls of the shell reactor 201 are reinforced support structures, such as... Figure 3 and Figure 4 As shown, several baffles 206 are also provided inside the water flow direction. These baffles 206 are arranged in parallel and staggered to achieve uniform flow of pure water.

[0049] The bottom of the shell reactor 201 is also provided with an adjustable angle support device 207. By adjusting the support device 207, the tilt angle of the shell reactor 201 can be changed. The tilt angle of the shell reactor 201 is 10°~70°, and the height to length ratio of the shell reactor 201 is 1:40~1:50.

[0050] The photocatalyst in the storage tank 202 is TiO2, CdS or g-C3N4.

[0051] Both the electrothermal glass 108 in the photothermal evaporation system 100 and the transparent glass in the shell reactor 201 can be disassembled at will, making them easy to clean and manufacture.

[0052] The light source for the entire device is natural sunlight. By reasonably setting the tilt angle of the electrothermal glass 108 and the tilt angle of the shell reactor 201 so that they face the sun, the device can maximize the reception of direct sunlight, increase the illumination area, and improve the photothermal conversion efficiency and photocatalytic efficiency.

[0053] The wastewater storage container 105 is connected to the wastewater inlet and outlet of the vertical container 101 to realize the circulation of the solution to be evaporated; circulation pumps are respectively installed on the connecting pipes between the wastewater storage container 105 and the vertical container 101, and on the connecting pipes between the liquid storage tank 202 and the shell reactor 201. The circulation pumps are powered by the photovoltaic power generation system 300.

[0054] like Figure 5As shown, the pure water collection tank 103 is provided with a first pure water outlet 110 connected to the shell reactor 201 and a second pure water outlet 111 connected to the water storage container 106. In the vertical direction, the first pure water outlet 110 is lower than the second pure water outlet 111. A first valve 112 is provided on the connecting pipe between the first pure water outlet 110 and the shell reactor 201. A second valve 113 is provided on the connecting pipe between the second pure water outlet 111 and the water storage container 106.

[0055] When both the first valve 112 and the second valve 113 are open, the pure water produced by the photothermal evaporation system 100 is preferentially used for the photocatalytic system 200. When the pure water level in the pure water collection tank 103 reaches the height of the second pure water outlet 111, some of the pure water is collected into the water storage container 106.

[0056] When the first valve 112 is closed and the second valve 113 is opened, the pure water produced by the photothermal evaporation system 100 no longer enters the photocatalytic system 200, but is all collected in the water storage container 106 to meet the pure water usage requirements.

[0057] When the first valve 112 is opened and the second valve 113 is closed, all the pure water produced by the photothermal evaporation system 100 is sent to the photocatalytic system 200 for photocatalytic hydrogen production.

[0058] It should be noted that the integrated solar energy utilization device of the present invention is particularly suitable for offshore operating platforms such as ocean-going vessels and offshore drilling platforms. This is because, firstly, offshore freshwater resources are scarce, but the space is open and solar energy resources are abundant; and secondly, due to the multi-functional integrated design of the device, it not only saves floor space but also meets a variety of needs.

[0059] Example 2

[0060] The implementation method of the integrated solar multi-functional utilization device based on Embodiment 1 above includes the following steps:

[0061] First, the photothermal evaporation material 104 in the photothermal evaporation system 100 uses the thermal energy in sunlight to cause the solution to be evaporated to become pure water. The pure water can be used as a raw material for hydrogen production in the photocatalytic reaction and enters the shell reactor 201 of the photocatalytic system 200. On the other hand, it can be stored as fresh water in the water storage container 106. Inside the shell reactor 201, the photocatalyst uses the light energy in sunlight to drive the pure water to undergo a photocatalytic reaction to generate hydrogen. The circulation pump equipped in the system realizes the continuous circulation of the reaction liquid and enhances the photocatalytic reaction process. At the same time, the photovoltaic power generation system 300 integrated at the bottom of the shell reactor 201 converts light energy into electrical energy to power the entire device and drive the electric heating glass 108 and the circulation pump.

[0062] Example 3, Application Testing

[0063] The application test of the integrated solar multifunctional utilization device of Example 1 was carried out as follows: The device was placed in a sunny location on the ship, and the test was conducted during the period of strongest sunlight, approximately 10:00-14:00. Seawater was added to the sewage storage container 105, and the three-dimensional porous graphene aerogel of the photothermal evaporation material 104 was placed in the vertical container 101. Then, the electric heating glass 108 was installed and sealed with silicone grease. Subsequently, the circulation pump was started to pump the seawater in the sewage storage container 105 into the vertical container 101. The low-density photothermal evaporation material 104 floated on the surface of the seawater. After evaporation for a period of time, the photocatalyst TiO2 was added to the storage tank 202. Then, the circulation pump was started to realize the circulation flow of the reaction liquid and enhance the dispersion of the photocatalyst.

[0064] Among them, the inclination angle of the electric heating glass 108 is 60°, the inclination angle of the condensing glass 109 is 30°, the inclination angle of the shell reactor 201 is 45°, the hydrophobic coating on the inner side of the condensing glass 109 is polytetrafluoroethylene, the area ratio of the photothermal evaporation material 104 to the vertical container 101 is 0.8:1, the area ratio of the pure water collection tank 103 to the vertical container 101 is 0.2:1, and the height to length ratio of the shell reactor 201 is 1:50.

[0065] After a period of illumination, it was found that in the photothermal evaporation system 100, no large area of ​​water vapor condensed on the inner surface of the heating glass 108 on the light-facing side, and it maintained good light transmittance; a large number of water droplets condensed on the inner surface of the condensing glass 109 on the shaded side, flowing downwards into the pure water collection tank 103; the pure water in the shell reactor 201 flowed uniformly along the partition 206 and circulated under the action of the circulation pump; a certain volume of fresh water was collected in the water storage container 106. Using a syringe, 1 mL of gas was drawn from the hydrogen collection port 107 and injected into the gas chromatograph; a hydrogen peak was clearly observed, proving that hydrogen was produced in the shell reactor 201.

[0066] In contrast, seawater that was not treated by the photothermal evaporation system 100 was directly added to the photocatalytic system 200, and the photocatalyst TiO2 was directly dispersed in the seawater. After the same amount of light exposure, the same volume of gas was taken out from the hydrogen collection port 107 and injected into a gas chromatograph to observe the peak area of ​​hydrogen.

[0067] The comparison revealed that the volume of hydrogen produced by photocatalytic decomposition of water using evaporated pure water was 30% higher than that produced by photocatalytic decomposition of seawater directly. This is because inorganic salt ions in seawater are adsorbed on the surface of the photocatalyst, reducing the active sites of the photocatalyst and thus lowering the catalytic effect.

[0068] In summary, this invention fully utilizes sunlight to develop an integrated device combining photothermal conversion, photocatalysis, and photovoltaic power generation for efficient hydrogen production and freshwater supply. By implementing photothermal evaporation and photocatalysis in separate zones, this invention solves problems such as low long-term device stability, reduced photocatalyst activity in wastewater, and sunlight scattering by pollutants, achieving highly efficient photothermal evaporation and photocatalytic hydrogen production, thus improving the utilization efficiency of sunlight. Furthermore, the integration of photocatalysis and photovoltaic power generation eliminates the need for an additional power supply and solves the problem of large footprint associated with conventional photovoltaic power generation.

[0069] The above accompanying drawings and descriptions only illustrate the preferred embodiments of the present invention. The present invention includes, but is not entirely limited to, the embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are within the scope of the present invention. Therefore, any equivalent substitutions or modifications made within the scope of the claims of the present invention are within the protection scope of the present invention.

Claims

1. A multi-functional integrated device for utilizing sunlight, characterized in that, This includes photothermal evaporation systems, photocatalytic systems, and photovoltaic power generation systems, among which: The photothermal evaporation system is used to process the solution to be evaporated to obtain pure water. It includes an open vertical container for holding the solution to be evaporated, an inverted V-shaped glass structure and a pure water collection tank respectively set above and on the inner edge of the vertical container, a photothermal evaporation material placed inside the vertical container, and a wastewater storage container and a water storage container respectively connected to the vertical container and the pure water collection tank. The top of the glass structure is also provided with a hydrogen collection port. The photocatalytic system is used for photocatalytic hydrogen production from pure water, including a shell reactor and a storage tank with built-in photocatalyst. The upper and lower sides of the shell reactor are both transparent glass, and the top is provided with a first water inlet and a second water inlet, and the bottom is provided with a water outlet. The pure water collection tank is connected to the first water inlet, and the storage tank is connected to the second water inlet and the water outlet. The photovoltaic power generation system is used to provide power to the photothermal evaporation system and the photocatalytic system, and includes solar photovoltaic panels and energy storage devices. The solar photovoltaic panels are installed on the lower surface of the light-transmitting glass on the lower side of the shell reactor. The glass structure includes an electrically heated glass on the light-facing side and a condensing glass on the back-facing side, as well as triangular support structures on the front and rear sides for supporting the electrically heated glass and the condensing glass; a sealing glass is also provided on the outside of the support structure; the electrically heated glass is powered by a photovoltaic power generation system; the inner side of the condensing glass is coated with a hydrophobic coating, and the material of the hydrophobic coating is polydimethylsiloxane or a fluoropolymer. The solution to be evaporated is seawater, industrial wastewater, or domestic sewage; the photothermal evaporation material is a three-dimensional porous graphene aerogel or a MOF material loaded on a lightweight hydrophobic substrate, and the MOF material has broad-spectrum absorption characteristics.

2. The integrated solar multi-functional utilization device according to claim 1, characterized in that, In the photothermal evaporation system, the tilt angle of the heating glass is 10°~70°, and the tilt angle of the condensing glass is 15°~45°.

3. The integrated solar multi-functional utilization device according to claim 1, characterized in that, In the photothermal evaporation system, the area ratio of the photothermal evaporation material to the vertical container is 0.8:1 to 0.9:1, and the area ratio of the pure water collection tank to the vertical container is 0.1:1 to 0.2:

1.

4. The integrated solar multi-functional utilization device according to claim 1, characterized in that, The upper and lower transparent glass of the shell reactor is made of quartz glass or ultra-clear glass with high light transmittance; the side wall of the shell reactor is a reinforced support mechanism, and several baffles are also provided inside along the water flow direction, and the baffles are arranged in parallel and staggered.

5. The integrated device for multifunctional utilization of sunlight according to claim 1, characterized in that, The bottom of the shell reactor is also provided with an adjustable angle support device. The tilt angle of the shell reactor can be changed by adjusting the support device. The tilt angle of the shell reactor is 10° to 70°, and the height to length ratio of the shell reactor is 1:40 to 1:

50. The photocatalyst in the storage tank is TiO2, CdS, or g-C3N4.

6. The integrated device for multifunctional utilization of sunlight according to claim 1, characterized in that, The wastewater storage container is connected to the wastewater inlet and outlet of the vertical container to realize the circulation of the solution to be evaporated; circulation pumps are respectively installed on the connecting pipes between the wastewater storage container and the vertical container, and on the connecting pipes between the storage tank and the shell reactor. The circulation pumps are powered by the photovoltaic power generation system.

7. The integrated solar multi-functional utilization device according to claim 1, characterized in that, The pure water collection tank is provided with a first pure water outlet connected to the shell reactor and a second pure water outlet connected to the water storage container. In the vertical direction, the first pure water outlet is lower than the second pure water outlet. A first valve is provided on the connecting pipe between the first pure water outlet and the shell reactor. A second valve is provided on the connecting pipe between the second pure water outlet and the water storage container.

8. A method using the integrated solar multi-functional utilization device according to any one of claims 1 to 7, characterized in that, Includes the following steps: First, the photothermal evaporation material in the photothermal evaporation system uses the thermal energy in sunlight to cause the solution to evaporate into pure water. The pure water enters the shell reactor of the photocatalytic system as a raw material for hydrogen production in the photocatalytic reaction, and is also stored in a water storage container. Inside the shell reactor, the photocatalyst uses the light energy in sunlight to drive the pure water to undergo a photocatalytic reaction to generate hydrogen. At the same time, the photovoltaic power generation system integrated at the bottom of the shell reactor converts the light energy into electrical energy to power the entire device.

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