Modularized integrated photocatalytic hydrogen production system and photocatalytic hydrogen production method thereof

Abstract

The embodiment of the invention relates to a modular integrated photocatalytic hydrogen production system and a photocatalytic hydrogen production method thereof, and belongs to the technical field of new energy photocatalytic hydrogen production. The modularized integrated photocatalytic hydrogen production system comprises an integrated rack, a plurality of photocatalytic hydrogen production reaction devices are arranged in the integrated rack, and the photocatalytic hydrogen production reaction devices are connected with a monitoring control device. The modularized integrated photocatalytic hydrogen production system provided by the embodiment of the invention not only integrates the photocatalytic hydrogen production reactor, efficient utilization of light emitted by the light source and timely recycling of volatile reaction liquid, but also adopts a modularized structure to integrate a plurality of photocatalytic hydrogen production reaction devices, pipelines thereof and a control system; the whole device is simple in structure, convenient to machine, convenient to use and beneficial to equipment management and maintenance, the hydrogen production scale can be conveniently expanded according to needs, and application and popularization of the photocatalytic hydrogen production technology are facilitated.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of new energy photocatalytic hydrogen production, and in particular, to a modular integrated photocatalytic hydrogen production system and a photocatalytic hydrogen production method thereof. Background Art

[0002] With the continuous growth of energy demand and the increasing awareness of environmental protection, the search for clean and renewable energy has become one of the hot topics of global concern. Hydrogen, as a high calorific value, zero-emission energy carrier, is considered to be one of the ideal clean energy sources in the future. However, traditional hydrogen production methods, such as fossil fuel reforming and water-gas conversion, not only consume a large amount of non-renewable resources, but are also accompanied by the emission of greenhouse gases and other harmful substances, which have a serious impact on the environment. Therefore, the development of efficient and environmentally friendly hydrogen production technology has become an urgent need. Photocatalytic hydrogen production technology is a green and sustainable energy conversion method that uses solar energy to decompose water into hydrogen and oxygen. It can not only realize the conversion of solar energy into chemical energy, but also achieve zero-emission hydrogen production, providing a new idea for solving energy crises and environmental pollution problems.

[0003] The working principle of photocatalytic hydrogen production mainly includes the following steps: (1) Light absorption: Semiconductor materials have energy band structures. When light is irradiated to the surface of semiconductor materials, photons are absorbed by the semiconductor and photogenerated carriers (electrons and holes) are generated; (2) Carrier separation: In semiconductor materials, due to the limitations of the energy band structure, electrons will jump to the conduction band and become free electrons, while holes will remain in the valence band; (3) Carrier migration: Photogenerated electrons and holes migrate to the surface of the photocatalyst and undergo redox reactions with water molecules or hydrogen-containing reaction liquid adsorbed on the surface, in which holes participate in the oxidation reaction and electrons participate in the reduction reaction of hydrogen ions to generate hydrogen, which is collected, stored and utilized by a collection device. Therefore, photocatalytic hydrogen production technology is not only environmentally friendly and efficient, but also has great application prospects.

[0004] The full absorption and utilization of incident light is not only the core factor in improving the energy conversion efficiency of photocatalytic hydrogen production technology, but also directly related to the cost of the produced hydrogen and the promotion and application of this technology. In the existing technology, the main focus is on photocatalysts, that is, the development of photocatalysts with higher light absorption efficiency and wider light absorption range. However, in addition to the research and development of photocatalysts, reactor design is also the key to improving the utilization rate of light energy. By optimizing the structure of the reactor, the configuration of the light source, etc., the efficiency and economy of photocatalytic hydrogen production can be further improved.

[0005] The photocatalytic hydrogen production process is carried out in a reaction device, and the design of the reactor is directly related to the efficiency and stability of the photocatalytic hydrogen production process. Since photocatalytic hydrogen production technology involves multidisciplinary intersections, the design and optimization of hydrogen production reaction devices require the comprehensive application of knowledge in multiple fields such as materials science, chemistry, and optics. Therefore, the development of efficient and stable photocatalytic hydrogen production reaction devices has far-reaching significance for promoting the development of the hydrogen energy economy and realizing the green transformation of the energy structure. With the continuous maturity of photocatalytic hydrogen production technology, more and more research institutions and enterprises have begun to explore its industrial application. In recent years, the research and development of photocatalytic hydrogen production reaction devices has made significant progress, and a variety of new reactors have been designed, such as suspended photocatalytic reactors, fixed photocatalytic reaction devices, focusing reactors, microfluidic reactors, etc. These reactors have their own characteristics and effectively improve the efficiency and stability of photocatalytic hydrogen production. However, the current design of reactors often has problems such as uneven light distribution, low mass transfer efficiency, and poor product separation effect. The following problems need to be solved urgently: First, the utilization rate of light energy is low; second, the current photocatalytic hydrogen production reaction device contains multiple parts and components, which increases the complexity and maintenance difficulty of the system, and the cost of optical components such as condensers is high, which limits the commercial application of photocatalytic hydrogen production technology; third, although the laboratory-scale photocatalytic hydrogen production reaction device has achieved certain results, it still faces many challenges in the process of industrial application, such as the decline in efficiency, energy consumption, and cost increase after the reaction scale is enlarged. Therefore, it is necessary to further strengthen the research and development of photocatalytic hydrogen production reaction devices to promote the continuous advancement and commercial application of photocatalytic hydrogen production technology. Summary of the invention

[0006] In view of this, the embodiment of the present application provides a modular integrated photocatalytic hydrogen production system and a photocatalytic hydrogen production method, which not only integrates the photocatalytic hydrogen production reactor, the efficient utilization of light emitted by the light source, and the timely recovery and utilization of the volatilized reaction liquid, but also adopts a modular structure to integrate multiple photocatalytic hydrogen production reaction devices and their pipelines and control systems. The entire device is not only simple in structure, easy to process, easy to use, and conducive to equipment management and maintenance, but also easy to expand the scale of hydrogen production as needed, which is conducive to the promotion and application of photocatalytic hydrogen production technology to solve the technical problems raised by the background technology.

[0007] A first aspect of an embodiment of the present application provides a modular integrated photocatalytic hydrogen production system, including an integrated rack, wherein a plurality of photocatalytic hydrogen production reaction devices are arranged in the integrated rack, and the photocatalytic hydrogen production reaction devices are connected to a monitoring and control device.

[0008] In some embodiments that may include the above-mentioned embodiments, the photocatalytic hydrogen production reaction device includes a photocatalytic hydrogen production reactor, a light source is arranged at the outer bottom of the photocatalytic hydrogen production reactor, a metal condensation plate is arranged inside the photocatalytic hydrogen production reactor, and the metal condensation plate is located in the upper middle part of the photocatalytic hydrogen production reactor and is fixedly connected to the inner wall of the photocatalytic hydrogen production reactor.

[0009] In some embodiments that may include the above embodiments, the photocatalytic hydrogen production reactor is formed by a quartz glass bottom plate on the bottom, a metal side plate on the side, and an upper metal panel on the top, and a cavity is formed inside the reactor for holding a hydrogen-containing reaction liquid, and the inner wall of the metal side plate is set to a smooth surface;

[0010] The quartz glass bottom plate is arranged above the light source, and a photocatalyst is arranged on the quartz glass bottom plate, the photocatalyst is immersed in the hydrogen-containing reaction liquid, and the metal condensation plate is located above the liquid surface of the hydrogen-containing reaction liquid;

[0011] A liquid inlet is provided on the metal side plate and located above the liquid surface of the hydrogen-containing reaction liquid, and the liquid inlet is located below the metal condensation plate, and the liquid inlet is used for the inflow of liquid; a liquid outlet is provided on the metal side plate and close to the quartz glass bottom plate, and the liquid outlet is located below the liquid inlet, and the liquid outlet is used for the outflow of liquid;

[0012] The upper metal panel is provided with a hydrogen outlet.

[0013] In some embodiments that may include the above embodiments, the metal condensation plate includes at least two metal thin plates, the metal thin plates are located above the liquid level of the hydrogen-containing reaction liquid and close to the upper metal panel, the lowermost metal thin plate of the metal condensation plate is set to a smooth surface facing the plate surface of the hydrogen-containing reaction liquid, one end of the metal thin plate is fixedly connected to the inner wall of the metal side plate, the other end of the metal thin plate is suspended, and the metal thin plate is inclined and forms an angle of 10-80 degrees with the horizontal plane;

[0014] A circulating water inlet and outlet are provided on the metal side plate, and the circulating water inlet and outlet are located above the liquid inlet. The circulating water inlet and outlet are connected to one end of the metal sheet that is fixed, and the circulating water inlet and outlet transports the condensed circulating water to the metal sheet. A reaction liquid condensation lower port is provided below one end of the metal sheet that is located in the photocatalytic hydrogen production reactor and is the lowest among the metal condensation plates.

[0015] In some embodiments that may include the above embodiments, a plurality of photocatalytic hydrogen production reaction device host chassis are arranged in the integrated frame, and a pipeline channel is formed between the integrated frame and the photocatalytic hydrogen production reaction device host chassis;

[0016] The pipeline channel is integrated with a power line of a light source respectively connected to the monitoring and control device, a hydrogen transmission channel, a condensed water pipe, a liquid inlet pipe and a liquid outlet pipe, the power line of the light source is electrically connected to the light source, the hydrogen transmission channel is threadedly connected to the hydrogen outlet of the photocatalytic hydrogen production reaction device, the condensed water pipe is threadedly connected to the circulating water inlet and outlet of the photocatalytic hydrogen production reaction device, the liquid inlet pipe is threadedly connected to the liquid inlet of the photocatalytic hydrogen production reaction device, and the liquid outlet pipe is threadedly connected to the liquid outlet of the photocatalytic hydrogen production reaction device;

[0017] The length, width and height of the mainframe chassis of the photocatalytic hydrogen production reaction device are all greater than the outer dimensions of the mainframe of the photocatalytic hydrogen production reaction device by more than 5 mm.

[0018] In some embodiments that may include the above embodiments, the monitoring and control device includes a hydrogen transmission channel pressure and flow monitoring module, a light source power supply control module, a condensed water pipe control module, a liquid inlet pipe control module, and a liquid outlet pipe control module;

[0019] The power control module of the light source is connected to the power line of the light source to control its start and stop and adjust the luminous power of the light source, the hydrogen transmission channel pressure and flow monitoring module is connected to the hydrogen transmission channel to monitor its channel pressure and flow, the condensate pipe control module is connected to the condensate pipe to control its start and stop, the liquid inlet pipe control module is connected to the liquid inlet pipe to control the addition of hydrogen-containing reaction liquid, and the liquid outlet pipe control module is connected to the liquid outlet pipe to control the outflow of waste liquid; the monitoring and control device is used to control the working condition of each photocatalytic hydrogen production reaction device and monitor its hydrogen production condition.

[0020] In some embodiments that may include the above-mentioned embodiments, the number of the photocatalytic hydrogen production reaction devices is at least two, and the number of the photocatalytic hydrogen production reaction device host chassis corresponds to the number of the photocatalytic hydrogen production reaction devices, two or more of the photocatalytic hydrogen production reaction devices are placed in the host chassis of the photocatalytic hydrogen production reaction device, and the power line of the light source, the hydrogen transmission channel, the condensed water pipe, the liquid inlet pipe and the liquid outlet pipe in the pipeline channel are respectively connected to the monitoring and control device, and the monitoring and control device controls the opening and closing of the power line of the light source, the hydrogen transmission channel, the condensed water pipe, the liquid inlet pipe and the liquid outlet pipe.

[0021] A second aspect of the embodiment of the present application further provides a photocatalytic hydrogen production method based on the above modular integrated photocatalytic hydrogen production system, comprising the following steps:

[0022] A photocatalyst and a hydrogen-containing reaction liquid are added to each photocatalytic hydrogen production reactor, and the photocatalyst is immersed in the hydrogen-containing reaction liquid. Light emitted by a light source is absorbed by the photocatalyst through a quartz glass bottom plate at the bottom of the photocatalytic hydrogen production reactor for photocatalytic hydrogen production reaction. Hydrogen generated by photocatalysis is collected through a hydrogen outlet. During the reaction, a monitoring and control device controls the continuous addition of hydrogen-containing reaction liquid in each photocatalytic hydrogen production reactor and monitors its hydrogen pressure and flow rate.

[0023] In some embodiments that may include the above-mentioned embodiments, light that is not absorbed by the photocatalyst in each photocatalytic hydrogen production reactor is reflected by the smooth inner surface of the metal side plate and the smooth inner surface of the lowest metal sheet in the metal condensation plate, and is absorbed by the photocatalyst for photocatalytic hydrogen production reaction.

[0024] In some embodiments that may include the above embodiments, the hydrogen-containing reaction liquid evaporated during the hydrogen production reaction in each photocatalytic hydrogen production reactor is promptly condensed into liquid by the metal condensation plate and flows into the reaction liquid to be reused.

[0025] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0026] (1) Expanding the scale of hydrogen production: The present application adopts a modular structure to integrate multiple photocatalytic hydrogen production reaction devices and their pipelines and control systems. The entire device is not only simple in structure, easy to process, easy to use, and conducive to equipment management and maintenance, but also easy to expand the scale of hydrogen production as needed, which is conducive to the promotion and application of photocatalytic hydrogen production technology; and the present application integrates the photocatalytic hydrogen production reactor, the efficient use of light emitted by the light source, and the timely recovery and utilization of the volatilized reaction liquid into one. The entire device is simple in structure, easy to process, and easy to use, which is conducive to the promotion and application of photocatalytic hydrogen production technology.

[0027] (2) Efficient use of light energy: The present application breaks through the design concept of previous photocatalytic reactors and adopts a mirror-like smooth inner surface on the metal side plate of the photocatalytic hydrogen production reactor and the inner side of the metal thin plate on the top of the reaction liquid. When hydrogen is produced by photocatalytic reaction, most of the light emitted by the light source is absorbed by the photocatalyst in the photocatalytic hydrogen production reactor for hydrogen production reaction, while the light that is not absorbed is reflected by the smooth inner surface of the metal side plate and the smooth inner surface of the metal thin plate on the top of the hydrogen-containing reaction liquid, and continues to participate in the photocatalytic hydrogen production reaction, thereby greatly improving the utilization rate of light.

[0028] (3) Realizing the recovery and reuse of hydrogen-containing reaction liquid: The hydrogen-containing reaction liquid volatilized during the photocatalytic hydrogen production reaction of the present application is promptly condensed into liquid by the metal condensation plate and flows into the reaction liquid for reuse, which not only improves the utilization rate of the hydrogen-containing reaction liquid, but also greatly reduces the humidity of the prepared hydrogen, thereby reducing the subsequent drying treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of a modular integrated photocatalytic hydrogen production system according to an embodiment of the present application;

[0031] Figure 2 This is a schematic structural diagram of a photocatalytic hydrogen production reaction device according to an embodiment of the present application;

[0032] Figure 3 This is a schematic structural diagram of a metal condensation plate according to an embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the unabsorbed light of an embodiment of the present application being reflected and reused through the inner wall of the reactor;

[0034] Figure 5 This is a schematic diagram of the structure of an integrated rack according to an embodiment of the present application;

[0035] Figure 6 Schematic diagram of the structure of the monitoring and control device of an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Photocatalytic hydrogen production reaction device; 11. Photocatalytic hydrogen production reactor; 1101. Quartz glass bottom plate; 1102. Metal side plate; 1103. Upper metal panel; 1104. Liquid inlet; 1105. Liquid outlet; 1106. Hydrogen outlet; 1107. Photocatalyst; 1108. Hydrogen-containing reaction liquid; 12. Light source; 13. Metal condensation plate; 1301. Metal thin plate; 1302. Condensed circulating water; 1303. Circulating water inlet and outlet; 1304. The lower port of the reaction liquid condensation; 2. Integrated rack; 201. Main chassis of the photocatalytic hydrogen production reaction device; 202. Power cord of the light source; 203. Hydrogen transmission channel; 204. Condensate pipe; 205. Liquid inlet pipe; 206. Liquid outlet pipe; 3. Monitoring and control device; 301. Hydrogen transmission channel pressure and flow monitoring module; 302. Power control module of the light source; 303. Condensate pipe control module; 304. Liquid inlet pipe control module; 305. Liquid outlet pipe control module. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0040] Secondly, it should be noted that in the description of the present application, terms such as "up", "down", "left", "right", "front", "back", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0041] The current reactor designs in related technologies often have problems such as uneven light distribution, low mass transfer efficiency, and poor product separation. The following problems need to be solved urgently: First, the utilization rate of light energy is low; second, the current photocatalytic hydrogen production reaction device contains multiple parts and components, which increases the complexity and maintenance difficulty of the system, and the cost of optical components such as condensers is high, which limits the commercial application of photocatalytic hydrogen production technology; third, although laboratory-scale photocatalytic hydrogen production reaction devices have achieved certain results, they still face many challenges in the process of industrial application, such as decreased efficiency, energy consumption, and increased costs after the reaction scale is expanded.

[0042] In order to solve the above technical problems, Figure 1 As shown, an embodiment of the present application provides a modular integrated photocatalytic hydrogen production system, including an integrated frame 2, in which a plurality of photocatalytic hydrogen production reaction devices 1 are arranged, and the photocatalytic hydrogen production reaction devices 1 are connected to a monitoring and control device 3.

[0043] Further, refer to Figure 2 The photocatalytic hydrogen production reaction device 1 includes a photocatalytic hydrogen production reactor 11, a light source 12 is arranged at the outer bottom of the photocatalytic hydrogen production reactor 11, a metal condensation plate 13 is arranged inside the photocatalytic hydrogen production reactor 11, and the metal condensation plate 13 is located in the middle and upper part of the photocatalytic hydrogen production reactor 11 and is fixedly connected to the inner wall of the photocatalytic hydrogen production reactor 11.

[0044] In a specific embodiment, the light source 12 is set as an LED light source and is evenly distributed below the photocatalytic hydrogen production reactor 11. The number of LED lights, the power size and the density of the arrangement are set according to actual needs to ensure that the light emitted by them can be evenly and quickly absorbed. The metal condensation plate 13 can be fixed to the inner wall of the photocatalytic hydrogen production reactor 11 by threaded connection or welding. Other methods that can achieve fixed connection are also applicable to the embodiments of the present application and are not limited here.

[0045] Further, refer to Figure 2 The photocatalytic hydrogen production reactor 11 is formed by a quartz glass bottom plate 1101 on the bottom, a metal side plate 1102 on the side and an upper metal panel 1103 on the top, and a cavity is formed inside it for holding a hydrogen-containing reaction liquid 1108. The inner wall of the metal side plate 1102 is set to a smooth surface.

[0046] In a specific embodiment, the quartz glass bottom plate 1101 and the upper metal panel 1103 are arranged opposite to each other, serving as the bottom and the top respectively, and the quartz glass bottom plate 1101 and the upper metal panel 1103 are fixedly connected to the metal side plate 1102 respectively, and the specific fixing method is not limited, for example, it can be fixedly connected by threaded connection or welding. In addition, the material of the quartz glass bottom plate 1101 is quartz glass, and the material of the metal side plate 1102 and the upper metal panel 1103 are both metal, for example, aluminum alloy or stainless steel, which is not limited in this application.

[0047] The quartz glass bottom plate 1101 is disposed above the light source 12 , and a photocatalyst 1107 is disposed on the quartz glass bottom plate 1101 . The photocatalyst 1107 is immersed in the hydrogen-containing reaction liquid 1108 , and the metal condensation plate 13 is located above the liquid surface of the hydrogen-containing reaction liquid 1108 .

[0048] In a specific embodiment, the photocatalyst 1107 can be a titanium dioxide photocatalyst or a g-C3N4 photocatalyst, and the hydrogen-containing reaction liquid 1108 can be water or methanol or a mixture of the two. Other photocatalysts and hydrogen-containing reaction liquids that can achieve photocatalytic hydrogen production are also applicable to the embodiments of the present application, without limitation.

[0049] Specifically, a liquid inlet 1104 is provided on the metal side plate 1102 and is located above the liquid surface of the hydrogen-containing reaction liquid 1108, and the liquid inlet 1104 is located below the metal condensation plate 13, and the liquid inlet 1104 is used for the inflow of liquid; a liquid outlet 1105 is provided on the metal side plate 1102 and is close to the quartz glass bottom plate 1101, and the liquid outlet 1105 is located below the liquid inlet 1104, and the liquid outlet 1105 is used for the outflow of liquid; a hydrogen outlet 1106 is provided on the upper metal panel 1103.

[0050] Further, refer to Figure 2 , Figure 3 and Figure 4 The metal condensation plate 13 includes at least two metal thin plates 1301, the metal thin plates 1301 are located above the liquid level of the hydrogen-containing reaction liquid 1108 and close to the upper metal panel 1103, the plate surface of the lowest metal thin plate 1301 in the metal condensation plate 13 facing the hydrogen-containing reaction liquid 1108 is set to a smooth surface, one end of the metal thin plate 1301 is fixedly connected to the inner wall of the metal side plate 1102, and the other end of the metal thin plate 1301 is suspended, and the metal thin plate 1301 is inclined and forms an angle of 10-80 degrees with the horizontal plane.

[0051] In a specific embodiment, one end of the metal sheet 1301 is fixed to the inner wall of the metal side plate 1102 by means of a threaded connection. The metal sheet 1301 is tilted and forms an angle of 45 degrees with the horizontal plane. Other inclinations can be selected according to actual needs, and this embodiment of the present application does not limit this.

[0052] Specifically, a circulating water inlet and outlet 1303 is provided on the metal side plate 1102, and the circulating water inlet and outlet 1303 is located above the liquid inlet 1104. The circulating water inlet and outlet 1303 is connected to the fixed end of the metal sheet 1301. The circulating water inlet and outlet 1303 transports the condensed circulating water 1302 to the metal sheet 1301. A reaction liquid condensation lower port 1304 is provided below the fixed end of the metal sheet 1301 which is located in the photocatalytic hydrogen production reactor 11 and is the lowest among the metal condensation plates 13.

[0053] It should be noted that a conventional water pipe (not shown in the figure) for the circulation of condensed circulating water 1302 is correspondingly arranged on the metal sheet 1301. The condensed circulating water 1302 is transported from the circulating water inlet and outlet 1303 to the circulating water inlet and outlet 1303 through the metal sheet 1301 via the conventional water pipe. The conventional water pipe can be a conventional PVC pipe or copper pipe, which is not limited in the present application. The metal sheet 1301 can be a single-layer thin plate, in which case the conventional water pipe is laid on the upper surface of the metal sheet 1301. The metal sheet 1301 can also be a hollow thin plate, in which case the conventional water pipe is laid on the lower surface of the hollow metal sheet 1301, which is not limited in the present application. Conventional water pipes are laid along the slope of the metal sheet 1301 from top to bottom and may be in a zigzag shape, which is not limited in the present application, until the circulating water inlet and outlet 1303 of the lowest metal sheet (i.e., the same conventional water pipe connects the circulating water inlet and outlet 1303 of two adjacent metal sheets 1301, which is used to respond to the above-described condensed circulating water 1302 being transported from the circulating water inlet and outlet 1303 through the metal sheet 1301 to the circulating water inlet and outlet 1303 of the adjacent metal sheet 1301 through the conventional water pipe). The connection between the conventional water pipe and the metal sheet 1301 adopts a suitable connection method, such as clip fixation, etc., which is not limited in the present application. During the photocatalytic hydrogen production reaction, the volatilized reaction liquid vapor of the hydrogen-containing reaction liquid 1108 is blocked by the metal sheet 1301 with a lower temperature through which the condensation circulating water 1302 is passed, and the reaction liquid vapor is cooled and turned into droplets, among which the reaction liquid droplets cooled by the bottom metal sheet 1301 directly drip into the hydrogen-containing reaction liquid 1108 to be reused; the uncondensed reaction liquid vapor passes through the gaps between the multiple layers of metal sheets 1301 and enters the second, third and even top metal sheets 1301 from bottom to top. After the reaction liquid vapor is cooled by each layer of metal sheets 1301 from bottom to top, the cooling droplets flow along the slope of each layer of metal sheets 1301 to the next layer of metal sheets 1301, and finally reach the bottom metal sheet 1301, and drip into the hydrogen-containing reaction liquid 1108 through the reaction liquid condensation lower port 1304 to participate in the photocatalytic reaction again. After the above-mentioned circulating water condensation process, not only the hydrogen-containing reaction liquid is fully utilized, but also the humidity of the hydrogen collected from the hydrogen outlet 1106 is greatly reduced and the purity is greatly improved, which effectively reduces the subsequent drying cost of the produced hydrogen.

[0054] Further, refer to Figure 5 A plurality of photocatalytic hydrogen production reaction device mainframe chassis 201 are arranged in the integrated frame 2, and a pipeline channel is formed between the integrated frame 2 and the photocatalytic hydrogen production reaction device mainframe chassis 201.

[0055] Among them, the pipeline channel is integrated with a power cord 202 of the light source, a hydrogen transmission channel 203, a condensed water pipe 204, a liquid inlet pipe 205 and a liquid outlet pipe 206, which are respectively connected to the monitoring and control device 3. The power cord 202 of the light source is electrically connected to the light source 12, the hydrogen transmission channel 203 is threadedly connected to the hydrogen outlet 1106 in the photocatalytic hydrogen production reaction device 1, the condensed water pipe 204 is threadedly connected to the circulating water inlet and outlet 1303 in the photocatalytic hydrogen production reaction device 1, the liquid inlet pipe 205 is threadedly connected to the liquid inlet 1104 in the photocatalytic hydrogen production reaction device 1, and the liquid outlet pipe 206 is threadedly connected to the liquid outlet 1105 in the photocatalytic hydrogen production reaction device 1.

[0056] Specifically, the length, width and height of the main frame case 201 of the photocatalytic hydrogen production reaction device are more than 5 mm larger than the outer dimensions of the main frame of the photocatalytic hydrogen production reaction device 1 , and the main frame case 201 of the photocatalytic hydrogen production reaction device is used to load the main frame of the photocatalytic hydrogen production reaction device 1 .

[0057] In a specific implementation, the length, width and height of the photocatalytic hydrogen production reaction device host chassis 201 are 10 mm larger than the outer dimensions of the photocatalytic hydrogen production reaction device 1 host, ensuring that the host of the photocatalytic hydrogen production reaction device 1 is not damaged.

[0058] Further, refer to Figure 6 The monitoring and control device 3 includes a hydrogen transmission channel pressure flow monitoring module 301, a light source power supply control module 302, a condensed water pipe control module 303, a liquid inlet pipe control module 304 and a liquid outlet pipe control module 305.

[0059] Among them, the power control module 302 of the light source is connected to the power cord 202 of the light source to control its start and stop and adjust the luminous power of the light source, the hydrogen transmission channel pressure and flow monitoring module 301 is connected to the hydrogen transmission channel 203 to monitor its channel pressure and flow, the condensate pipe control module 303 is connected to the condensate pipe 204 to control its start and stop, the liquid inlet pipe control module 304 is connected to the liquid inlet pipe 205 to control the addition of hydrogen-containing reaction liquid 1108, and the liquid outlet pipe control module 305 is connected to the liquid outlet pipe 206 to control the outflow of waste liquid; the monitoring and control device 3 is used to control the working condition of each photocatalytic hydrogen production reaction device 1 and monitor its hydrogen production condition.

[0060] Further, refer to Figure 5The number of photocatalytic hydrogen production reaction devices 1 is at least two, specifically four, and the number of photocatalytic hydrogen production reaction device host chassis 201 corresponds to the number of photocatalytic hydrogen production reaction devices 1. Specifically, the number of photocatalytic hydrogen production reaction device host chassis 201 is also four. The four photocatalytic hydrogen production reaction devices 1 are respectively placed in the four photocatalytic hydrogen production reaction device host chassis 201. The power line 202, hydrogen transmission channel 203, condensed water pipe 204, liquid inlet pipe 205 and liquid outlet pipe 206 of the light source in the pipeline channel are respectively connected to the monitoring and control device 3, and the monitoring and control device 3 controls the opening and closing of the power line 202, hydrogen transmission channel 203, condensed water pipe 204, liquid inlet pipe 205 and liquid outlet pipe 206 of the light source.

[0061] refer to Figure 2 , Figure 3 and Figure 4 The present application adopts the above modular integrated photocatalytic hydrogen production system to carry out photocatalytic hydrogen production according to the principle of:

[0062] A photocatalyst 1107 and a hydrogen-containing reaction liquid 1108 are added to each photocatalytic hydrogen production reactor 11, and the photocatalyst 1107 is immersed in the hydrogen-containing reaction liquid 1108. The light emitted by the light source 12 is transmitted through the quartz glass bottom plate 1101 at the bottom of the photocatalytic hydrogen production reactor 11 and absorbed by the photocatalyst 1107 for photocatalytic hydrogen production reaction. The light not absorbed by the photocatalyst 1107 in each photocatalytic hydrogen production reactor 11 is reflected by the smooth inner surface of the metal side plate 1102 and the smooth inner surface of the lowest metal sheet 1301 in the metal condensation plate 13, and is absorbed by the photocatalyst 1107 for photocatalytic hydrogen production reaction. The hydrogen-containing reaction liquid 1108 evaporated in the hydrogen production reaction process of each photocatalytic hydrogen production reactor 11 is condensed into liquid in time by the metal condensation plate 13 and reused. The hydrogen generated by photocatalysis is collected through the hydrogen outlet 1106. During the reaction process, the monitoring and control device 3 controls the continuous addition of the hydrogen-containing reaction liquid 1108 in each photocatalytic hydrogen production reactor 11 and monitors its hydrogen pressure and flow rate.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A modular integrated photocatalytic hydrogen production system, characterized in that: It comprises an integrated frame (2), wherein a plurality of photocatalytic hydrogen production reaction devices (1) are arranged in the integrated frame (2), and the photocatalytic hydrogen production reaction devices (1) are connected to a monitoring and control device (3).

2. The modular integrated photocatalytic hydrogen production system according to claim 1, characterized in that: The photocatalytic hydrogen production reaction device (1) comprises a photocatalytic hydrogen production reactor (11), a light source (12) is arranged at the outer bottom of the photocatalytic hydrogen production reactor (11), a metal condensation plate (13) is arranged inside the photocatalytic hydrogen production reactor (11), and the metal condensation plate (13) is located in the upper middle part of the photocatalytic hydrogen production reactor (11) and is fixedly connected to the inner wall of the photocatalytic hydrogen production reactor (11).

3. The modular integrated photocatalytic hydrogen production system according to claim 2, characterized in that: The photocatalytic hydrogen production reactor (11) is formed by a quartz glass bottom plate (1101) on the bottom, a metal side plate (1102) on the side, and an upper metal panel (1103) on the top, which are fixedly connected, and a receiving cavity is formed inside the reactor for containing a hydrogen-containing reaction liquid (1108), and the inner wall of the metal side plate (1102) is set to a smooth surface; The quartz glass bottom plate (1101) is arranged above the light source (12), and a photocatalyst (1107) is arranged on the quartz glass bottom plate (1101), the photocatalyst (1107) is immersed in the hydrogen-containing reaction liquid (1108), and the metal condensation plate (13) is located above the liquid surface of the hydrogen-containing reaction liquid (1108); A liquid inlet (1104) is provided on the metal side plate (1102) and is located above the liquid surface of the hydrogen-containing reaction liquid (1108), and the liquid inlet (1104) is located below the metal condensation plate (13), and the liquid inlet (1104) is used for the inflow of liquid; a liquid outlet (1105) is provided on the metal side plate (1102) and is close to the quartz glass bottom plate (1101), and the liquid outlet (1105) is located below the liquid inlet (1104), and the liquid outlet (1105) is used for the outflow of liquid; The upper metal panel (1103) is provided with a hydrogen outlet (1106).

4. The modular integrated photocatalytic hydrogen production system according to claim 3, characterized in that: The metal condensation plate (13) comprises at least two metal thin plates (1301), the metal thin plates (1301) are located above the liquid level of the hydrogen-containing reaction liquid (1108) and close to the upper metal panel (1103), the plate surface of the lowest metal thin plate (1301) in the metal condensation plate (13) facing the hydrogen-containing reaction liquid (1108) is set to a smooth surface, one end of the metal thin plate (1301) is fixedly connected to the inner wall of the metal side plate (1102), and the other end of the metal thin plate (1301) is suspended, and the metal thin plate (1301) is inclined and forms an angle of 10-80 degrees with the horizontal plane; The metal side plate (1102) is provided with a circulating water inlet and outlet (1303), and the circulating water inlet and outlet (1303) is located above the liquid inlet (1104). The circulating water inlet and outlet (1303) is connected to one end fixed to the metal sheet (1301), and the circulating water inlet and outlet (1303) transports the condensed circulating water (1302) to the metal sheet (1301). A reaction liquid condensation lower port (1304) is provided below one end fixed to the lowest metal sheet (1301) in the metal condensation plate (13) and located in the photocatalytic hydrogen production reactor (11).

5. The modular integrated photocatalytic hydrogen production system according to claim 3, characterized in that: A plurality of photocatalytic hydrogen production reaction device host chassis (201) are arranged in the integrated frame (2), and a pipeline channel is formed between the integrated frame (2) and the photocatalytic hydrogen production reaction device host chassis (201); The pipeline channel is integrated with a power line (202) of a light source, a hydrogen transmission channel (203), a condensed water pipe (204), a liquid inlet pipe (205) and a liquid outlet pipe (206) which are respectively connected to the monitoring and control device (3); the power line (202) of the light source is electrically connected to the light source (12); the hydrogen transmission channel (203) is threadedly connected to the hydrogen outlet (1106) in the photocatalytic hydrogen production reaction device (1); the condensed water pipe (204) is threadedly connected to the circulating water inlet (1303) in the photocatalytic hydrogen production reaction device (1); the liquid inlet pipe (205) is threadedly connected to the liquid inlet (1104) in the photocatalytic hydrogen production reaction device (1); and the liquid outlet pipe (206) is threadedly connected to the liquid outlet (1105) in the photocatalytic hydrogen production reaction device (1); The length, width and height dimensions of the mainframe chassis (201) of the photocatalytic hydrogen production reaction device are all greater than 5 mm in size than the external dimensions of the mainframe of the photocatalytic hydrogen production reaction device (1).

6. The modular integrated photocatalytic hydrogen production system according to claim 5, characterized in that: The monitoring and control device (3) comprises a hydrogen transmission channel pressure flow monitoring module (301), a light source power supply control module (302), a condensed water pipe control module (303), a liquid inlet pipe control module (304) and a liquid outlet pipe control module (305); The power control module (302) of the light source is connected to the power line (202) of the light source to control its start and stop and adjust the luminous power of the light source, the hydrogen transmission channel pressure and flow monitoring module (301) is connected to the hydrogen transmission channel (203) to monitor its channel pressure and flow, the condensate pipe control module (303) is connected to the condensate pipe (204) to control its start and stop, the liquid inlet pipe control module (304) is connected to the liquid inlet pipe (205) to control the addition of hydrogen-containing reaction liquid (1108), and the liquid outlet pipe control module (305) is connected to the liquid outlet pipe (206) to control the outflow of waste liquid; the monitoring and control device (3) is used to control the working condition of each photocatalytic hydrogen production reaction device (1) and monitor its hydrogen production condition.

7. The modular integrated photocatalytic hydrogen production system according to claim 5, characterized in that: The number of the photocatalytic hydrogen production reaction devices (1) is at least two, and the number of the photocatalytic hydrogen production reaction device host chassis (201) corresponds to the number of the photocatalytic hydrogen production reaction devices (1). Two or more of the photocatalytic hydrogen production reaction devices (1) are placed in the photocatalytic hydrogen production reaction device host chassis (201). The power line (202) of the light source, the hydrogen transmission channel (203), the condensed water pipe (204), the liquid inlet pipe (205) and the liquid outlet pipe (206) in the pipeline channel are respectively connected to the monitoring and control device (3), and the monitoring and control device (3) controls the opening and closing of the power line (202) of the light source, the hydrogen transmission channel (203), the condensed water pipe (204), the liquid inlet pipe (205) and the liquid outlet pipe (206).

8. A method for photocatalytic hydrogen production based on the modular integrated photocatalytic hydrogen production system according to any one of claims 3 to 7, characterized in that: The following steps are involved: A photocatalyst (1107) and a hydrogen-containing reaction liquid (1108) are added to each photocatalytic hydrogen production reactor (11), and the photocatalyst (1107) is immersed in the hydrogen-containing reaction liquid (1108). Light emitted by a light source (12) passes through a quartz glass bottom plate (1101) at the bottom of the photocatalytic hydrogen production reactor (11) and is absorbed by the photocatalyst (1107) for a photocatalytic hydrogen production reaction. Hydrogen generated by photocatalysis is collected through a hydrogen outlet (1106). During the reaction, a monitoring and control device (3) controls the addition of the hydrogen-containing reaction liquid (1108) to each photocatalytic hydrogen production reactor (11) and monitors its hydrogen pressure and flow rate.

9. The photocatalytic hydrogen production method according to claim 8, characterized in that: The light in each photocatalytic hydrogen production reactor (11) that is not absorbed by the photocatalyst (1107) is reflected by the smooth inner surface of the metal side plate (1102) and the smooth inner surface of the lowest metal sheet (1301) in the metal condensation plate (13), and is absorbed by the photocatalyst (1107) for photocatalytic hydrogen production reaction.

10. The photocatalytic hydrogen production method according to claim 8, characterized in that: The hydrogen-containing reaction liquid (1108) evaporated during the hydrogen production reaction of each photocatalytic hydrogen production reactor (11) is promptly condensed into liquid by the metal condensation plate (13) and flows into the reaction liquid for reuse.

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