Projected UV-concentrated photocatalyst hydrogen production device, method, and use

Abstract

To provide a projected UV-concentrated photocatalyst hydrogen production device, method and use, capable of remarkably reducing a hydrogen production cost by storing electric power in a form of hydrogen energy and producing hydrogen by using electric power of a low price and a negative price, such as renewable energy power generation, bottom electricity and waste electricity.SOLUTION: The projected UV-concentrated photocatalyst hydrogen production device includes a hydrogen production unit, an artificial light concentrated light source unit, and a power adjustment unit. The hydrogen production unit includes a reaction tank and is used for catalytically decomposing water by artificial light to prepare hydrogen gas and oxygen gas. The artificial light concentrated light source unit includes a reflection assembly and several light emitting assemblies, the light emitting assemblies being used for emitting artificial light beams, and the reflection assembly being used for reflecting and concentrating the artificial light beams into the reaction tank. The power adjusting unit is used to provide the artificial light concentrated light source unit with electric energy.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of hydrogen production by renewable energy, and to an apparatus, method and use thereof for producing hydrogen using flood ultraviolet light concentrating catalyst. [Background technology]

[0002] In renewable energy power generation such as solar power generation and wind power generation, there is generally a large fluctuation, and when accessing the power grid, it is easy to cause grid imbalance. In addition, since there are fluctuations in the power consumption end such as peak and bottom consumption in the power grid, renewable energy power generation has a serious problem of wasted electricity due to the difference with the demand of the power grid. Storing wasted electricity by energy storage, hydrogen production, etc. is currently the main development direction to solve this problem. Among them, hydrogen energy can be widely applied in industrial production, hydrogen fuel automobiles, and other fields. Due to the imbalance of power supply and demand, the difference in electricity price between the peak and bottom, and even negative electricity prices have appeared. Hydrogen production by renewable energy power generation is green hydrogen, which can not only store excess new energy electricity, but also greatly reduce the production cost of hydrogen gas by taking advantage of the advantages of low electricity prices and negative electricity prices such as new energy electricity, bottom electricity, and waste electricity.

[0003] The main form of hydrogen production using renewable energy is hydrogen production using electrolytic water. According to the difference in electrolyte system, hydrogen production using electrolytic water can be divided into four types: alkaline electrolytic water (ALK), proton exchange membrane (PEM) electrolytic water, solid oxide electrolysis cell (SOEC), and anion exchange membrane (AEM). Alkaline electrolytic water is the most mature technology for hydrogen production using electrolytic water, but it has not yet been widely applied on a large scale. The main limiting factors are the high maintenance cost of alkalinity, high power consumption, large site area, and the need for a stable power supply during the electrolysis process, which is poorly compatible with green energy. Proton exchange membrane electrolytic water has higher overall efficiency and can adapt to the variability of renewable energy, making it a more promising hydrogen production technology using electrolytic water, but the cost of the catalyst and electrolytic tank materials used is high, especially the precious metal loading of the cathode and anode electrocatalysts, the efficiency of the electrolytic tank, and its lifespan are low.

[0004] Chinese patent CN114751371A discloses a hydrogen production reaction system by concentrated solar energy continuous flow gas-phase water decomposition, which uses natural light as a light source and requires a large area to receive sunlight, which increases the site area and costs.Japanese patent JP2018049632A discloses a method and device for producing hydrogen by solar energy double concentration catalyst, which produces hydrogen by irradiating sunlight and concentrating it twice, which is easily hindered and limited by the variability of sunlight, which further affects the effect of hydrogen production. Summary of the Invention [Problem to be solved by the invention]

[0005] In response to the shortcomings of the prior art, the present invention aims to provide a flood light ultraviolet light collecting catalytic hydrogen production device, method and use thereof. It can significantly reduce the cost of hydrogen production by storing electricity in the form of hydrogen energy and producing hydrogen using low-cost or negative-price electricity such as renewable energy generation, bottom electricity and waste electricity, and can automatically adjust the power according to the fluctuation characteristics of various types of electricity, making it suitable for hydrogen production and energy storage using multiple types of electricity. [Means for solving the problem]

[0006] In order to achieve the object, the present invention provides the following technical solutions.

[0007] In a first aspect, the present invention provides a flood light ultraviolet light concentrating catalytic hydrogen production device, comprising: a hydrogen production unit, an artificial light concentrating light source unit, and a power conditioning unit, wherein the hydrogen production unit includes a reaction tank and is used for catalytically decomposing water with artificial light to prepare hydrogen gas and oxygen gas, the artificial light concentrating light source unit includes a reflecting assembly and several light-emitting assemblies, the light-emitting assembly is used for emitting artificial light, the reflecting assembly is used for reflecting and concentrating the artificial light into the reaction tank, and the power conditioning unit is used for providing electrical energy to the artificial light concentrating light source unit.

[0008] In the present invention, electrical energy is converted into artificial light of a single wavelength range, and hydrogen is produced by catalytically decomposing water with the artificial light in a concentrated form, which greatly reduces the volume and footprint of the hydrogen production vessel, far smaller than the volume and cost of a conventional electrolytic water tank. Furthermore, hydrogen is produced in a totally closed reaction tank, reducing maintenance costs and improving the utilization efficiency of new energy.

[0009] In the present invention, the input end of the power conditioning unit is various low-price and negative-price electric energy with a certain variability, including but not limited to wind power electric energy, photovoltaic power electric energy, geothermal power electric energy, bottom electricity from the national power grid, waste electricity, etc.

[0010] As one preferred technical solution of the present invention, the flood light ultraviolet light concentrating catalytic hydrogen production device further includes a control unit, which is electrically connected to the power adjusting unit and the artificial concentrating light source unit respectively, and is used for feedback control of opening / closing and power adjustment of the light-emitting assembly according to the output power of the power adjusting unit.

[0011] The electric energy provided by the power conditioning unit is a constant voltage or a constant current.

[0012] In the present invention, the power conditioning unit adopts low-price and negative-price electricity such as renewable energy generation electric energy, bottom electricity, waste electricity, etc., which always have large fluctuations. By connecting such electric energy to a voltage regulator or a current regulator, a constant voltage or constant current input power can be obtained, and the control unit independently adjusts the power of the artificial light-concentrating light source unit according to the change in the power output power of the power source, thereby adapting to hydrogen production and energy storage using multiple types of electricity.

[0013] In one preferred technical solution of the present invention, the reflection assembly includes a reflector located above the reaction tank and / or a reflector wall plate located on the inner wall of the reaction tank.

[0014] The reflector is a plane reflector or a hyperbolic reflector.

[0015] The reflector and the reflector wall plate are each independently a polished aluminum alloy plate or an aluminized ultra-clear glass.

[0016] In addition, in the present invention, the reflector can be a smooth, highly reflective polished aluminum alloy plate or aluminum-plated ultra-transparent glass, and the reflective wall plate can also be a polished aluminum alloy plate or aluminum-plated ultra-transparent glass, and the reflector and the reflective wall plate are made of the same material. The reflector and the reflective wall plate in the present invention have an ultraviolet reflectance of more than 90%, and reflect and concentrate the light flux into the reaction tank.

[0017] In the present invention, a transparent top plate is provided on the top of the reaction tank. The transparent top plate includes a light-transmitting ultra-transparent glass. The reflecting mirror is fixed to the transparent top plate. The reaction tank in the present invention has a closed structure, and the artificial light incident from the transparent top plate is reflected by each reflecting wall plate, and the artificial light catalytically decomposes water in the raw material solution in the reaction tank to decompose and form hydrogen gas. Note that the structure of the reaction tank in the present invention is not limited, and it may be a rectangular tank body or a cylindrical tank body.

[0018] In one preferred technical solution of the present invention, several of the light emitting assemblies are mounted on the surface of the reflecting assembly or in the cavity of the reaction tank.

[0019] The light emitting assembly is an artificial cold light source.

[0020] The artificial cold light source includes an ultraviolet LED (Light-emitting Diode) chip and / or a blue light LED chip.

[0021] In the present invention, the light-emitting assembly may be provided on the surface of the reflecting assembly or in the cavity of the reaction tank. Those skilled in the art can arrange the light-emitting assemblies located on the surface of the reflecting assembly or in the cavity of the reaction tank in an array according to the actual situation. That is, the present invention provides the following aspects. When the light-emitting assembly is provided on the surface of the reflecting assembly located at the top of the reaction tank, several light-emitting assemblies are arranged in an array on the surface of the reflecting mirror, and the artificial light from the light-emitting assembly and the reflected artificial light enter the reaction tank through the transparent top plate. When the light-emitting assembly is fixed to the cavity of the reaction tank, several light-emitting assemblies are arranged in an array inside the chamber of the reaction tank and penetrate into the raw material solution in the reaction tank. When the light-emitting assembly is fixed to the reflecting wall plate on the inner wall of the reaction tank, several light-emitting assemblies are arranged in an array on the reflecting wall plate and penetrate into the raw material solution in the reaction tank.

[0022] In the present invention, after the stable power supply is accessed by the power regulation unit to the light-emitting assembly, the control unit adjusts the opening and closing and power regulation of the light-emitting assembly according to the change in the power output power of the power supply, so as to adapt to the fluctuation of the input power. At the same time, the reaction tank has a closed structure, and uses an artificial cold light source such as artificial ultraviolet light as the light source, so that the temperature change is small and one-time light collection is realized. Compared with the process of directly catalyzing sunlight to produce hydrogen in the conventional process, the present invention is not hindered and restricted by the variability of sunlight, and does not need to receive sunlight over a large area, so that the site area is small and the cost is low.

[0023] It should be noted that those skilled in the art can obtain a light-emitting module by connecting multiple light-emitting assemblies in series or in parallel according to the actual situation, and independently control the light-emitting modules through a control unit, and selectively switch or open or close the entire light-emitting module according to the change of the power supply output power.

[0024] As a preferred technical solution of the present invention, the artificial light concentrating light source unit further includes a cooling module for dissipating heat from the light emitting assembly and storing thermal energy.

[0025] The cooling module is used for providing a cooling form for the light-emitting assembly including loop-connected cooling or immersion cooling, and for providing thermal energy to the reaction tank.

[0026] In the present invention, the cooling module needs to be adjusted according to the position of the light-emitting assembly, that is, the present invention provides the following two types of embodiments: (1) When the light-emitting assembly is located above the reaction tank, the cooling module is circulatingly connected to the light-emitting assembly to circulate and cool the light-emitting assembly; (2) When the light-emitting assembly is installed inside the reaction tank, the cooling module similarly enters the reaction tank 1 and immersedly cools the light-emitting assembly with the water in the reaction tank. The cooling module in the present invention stores the heat generated when the light-emitting assembly emits light, collects the heat, and then transmits it to the reaction tank to heat and keep the water warm, which is advantageous for improving the reaction speed.

[0027] The present invention is not limited to a specific structure of the cooling module, and in order to help those skilled in the art to fully understand the overall technical solution and operation process of the present invention, the present invention provides the following specific structure of the related cooling module as an example. The cooling module includes a water cooling device, a water cooling pipe and a heat storage device, the water cooling pipe is close to the light emitting assembly, and the inlet end and the outlet end of the water cooling pipe are respectively connected to the water cooling device and the heat storage device, so that the cooling water flows through the water cooling pipe to cool the light emitting assembly, and the cooling water with the increased temperature enters the heat storage device to store heat. At the same time, the heat storage device is connected to a hydrogen production unit, and the hot water therein can be used as the raw material for the hydrogen production unit, and the stored heat can also heat the raw material in the reaction tank to keep it warm.

[0028] It should be noted that the above description of the structure of the cooling module is not intended to further limit the scope of protection of the present invention. That is, any cooling module already disclosed in the prior art or not disclosed in the new art can be used in the present invention, and is not limited to the operating module having the above structure. Any cooling module capable of achieving the same or similar function can be substituted. The technical solution obtained by the substitution also falls within the scope of protection and disclosure of the present invention.

[0029] In one preferred technical solution of the present invention, the reaction tank is further provided with a water inlet and a gas outlet.

[0030] The hydrogen production unit further includes a water supply module connected to the water supply port.

[0031] The hydrogen production unit further includes a separation module including a drying device, a separation device and a hydrogen storage device, which are connected in series to the gas outlet.

[0032] In the present invention, pure water is used as the raw material for producing hydrogen gas, and the pure water and the catalyst required for hydrogen production are fed into the reaction tank through the water inlet. The artificial light from the light-emitting assembly is collected in the reaction tank under the reflective action and high-magnification focusing action of the reflective assembly. Under the action of the artificial light and the catalyst, the pure water is decomposed into a mixed gas of hydrogen gas and oxygen gas. The mixed gas is discharged from the gas outlet. A separation module is disposed at the gas outlet to dry and separate the mixed gas of hydrogen gas and oxygen gas. The hydrogen gas is introduced into a solid hydrogen storage device for storage, and high-purity hydrogen gas and oxygen gas are obtained and collected respectively.

[0033] In a second aspect, the present invention provides a hydrogen production method using projecting ultraviolet light concentrating catalytic hydrogen production apparatus described in the first aspect, comprising: providing electrical energy to an artificial concentrating light source unit by a power conditioning unit to drive the light-emitting assembly to emit artificial light; and reflecting and concentrating the artificial light into a reaction tank, so that the raw material solution in the reaction tank undergoes an artificial photocatalytic decomposition reaction to produce hydrogen gas.

[0034] In one preferred technical solution of the present invention, the wavelength of the artificial light is 280-492 nm, and may be, for example, 280 nm, 285 nm, 300 nm, 350 nm, 355 nm, 360 nm, 361 nm, 362 nm, 364 nm, 365 nm, 370 nm, 395 nm, 400 nm, 420 nm, 450 nm, 480 nm, or 492 nm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, and may be a wavelength range such as 280-285 nm, 360-365 nm, 395-400 nm, or 400-492 nm.

[0035] The raw material solution contains pure water.

[0036] The temperature of the raw material solution is 60 to 90°C, and may be, for example, 60°C, 63°C, 65°C, 70°C, 75°C, 78°C, 80°C, 82°C, 85°C, 88°C or 90°C, but is not limited to the numerical values ​​listed, and other numerical values ​​not listed within the numerical range also apply similarly.

[0037] The raw material solution further contains a catalyst.

[0038] The concentration of the catalyst is 10 to 50 mg / L, and may be, for example, 10 mg / L, 15 mg / L, 20 mg / L, 25 mg / L, 30 mg / L, 35 mg / L, 40 mg / L, 45 mg / L or 50 mg / L, but is not limited to the recited values, and other unrecited values ​​within the numerical range also apply.

[0039] In addition, the present invention is not limited to the type of catalyst used, and any catalyst for hydrogen production familiar to those skilled in the art can be adopted, for example, strontium titanate catalyst or titanium dioxide catalyst. In order to obtain better results, those skilled in the art can adjust the state and type of catalyst according to the actual situation. For example, the catalyst can adopt nanoparticles, including but not limited to shapes such as spherical, nearly spherical, cubic, plate-like sheet, or polyhedral. The catalyst can be doped with a metal element, including but not limited to any one or a combination of at least two of Cu, Al, Au, Pd, and Pt. Among them, catalysts doped with metal elements are all products familiar to those skilled in the art.

[0040] In addition, the present invention can select different catalysts according to the wavelength of the artificial light to participate in hydrogen production by photolysis. For example, the quantum efficiency of aluminum-doped strontium titanate in catalytic photolysis of water by ultraviolet light is already 96% or more, so when the wavelength of the emitted ultraviolet light is in the range of 360-365 nm after the light-emitting assembly is energized, the strontium titanate catalyst can be used. The ultraviolet light is reflected and focused downward, and the intensity of the highly concentrated ultraviolet light is 100-2500 W / m 2 By this, the concentrated ultraviolet light beam enters the hydrogen production reaction tank through the transparent top plate of the reaction tank, and under the combined action of the ultraviolet light and the strontium titanate catalyst, the raw material solution is decomposed into hydrogen gas and oxygen gas and escapes from the water.

[0041] The pressure of the photodecomposition reaction is 0.1 to 0.3 MPa, and may be, for example, 0.10 MPa, 0.12 MPa, 0.15 MPa, 0.18 MPa, 0.20 MPa, 0.22 MPa, 0.23 MPa, 0.24 MPa, 0.25 MPa, 0.26 MPa, 0.28 MPa, or 0.30 MPa, but is not limited to the numerical values ​​listed above, and other numerical values ​​not listed above within the numerical range also apply.

[0042] As a preferred technical solution of the present invention, the flood ultraviolet light concentrating catalytic hydrogen production method further includes collecting the power output power of a power adjustment unit in real time, and feedback controlling the opening and closing and power adjustment of the light-emitting assembly according to fluctuations in the power output power.

[0043] In a third aspect, the present invention provides a use of the flood light ultraviolet light concentrating catalytic hydrogen production apparatus described in the first aspect, wherein the flood light ultraviolet light concentrating catalytic hydrogen production apparatus is used for storing hydrogen gas energy such as renewable energy generated electric energy, bottom electricity, and waste electricity.

[0044] The modularized flood light ultraviolet light concentrating catalytic hydrogen production device of the present invention can be applied to hydrogen production and energy storage from a variety of electric energy sources with variable characteristics, for example, low-cost hydrogen production and energy storage from electric energy generated by renewable energy sources such as wind power, solar power, and geothermal power, as well as low-cost and negative-price electricity such as bottom electricity and waste electricity.

[0045] The numerical ranges described in the present invention include not only the recited point values ​​but also any point values ​​between the recited numerical ranges that are not recited, and for the sake of space and clarity, the present invention does not exhaustively recite specific point values ​​included in the ranges.

[0046] The system refers to an equipment system, a device system, or a production device. Effect of the Invention

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows: The flood light ultraviolet light concentrating catalytic hydrogen production device, method and use according to the present invention convert electrical energy into artificial light of a single wavelength range, and produce hydrogen by catalytically decomposing water with the artificial light through concentrating light, thereby greatly reducing the volume and site area of ​​the hydrogen production vessel, storing low-cost and negative-cost electricity in the form of hydrogen gas energy, significantly reducing the cost of hydrogen production, and independently adjusting the power of the light source according to the fluctuation characteristics of various types of electricity, making it suitable for hydrogen production and energy storage from renewable energy power generation, bottom electricity and waste electricity. [Brief description of the drawings]

[0048] [Figure 1] 1 is a structural schematic diagram of a projected ultraviolet light collecting catalyst hydrogen production device according to Example 1 of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of a light-emitting assembly according to the first embodiment of the present invention. [Diagram 3] FIG. 6 is a structural schematic diagram of a projected ultraviolet light collecting catalyst hydrogen production device according to Example 2 of the present invention. [Figure 4] FIG. 4 is a structural schematic diagram of a light-emitting assembly according to Example 2 of the present invention. [Explanation of symbols]

[0049] 1: reaction tank; 2: reflector; 3: chip; 4: water inlet; 5: gas outlet; 6: transparent top plate; 7: pure water. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0050] In the description of the present invention, the orientations and positional relationships indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the orientations and positional relationships shown in the drawings, and are merely intended to facilitate and simplify the description of the present invention, and do not indicate or suggest that the devices or elements mentioned have a specific orientation and must be configured and operated in a specific orientation. Therefore, it should be understood that they do not limit the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more than two.

[0051] In the description of the present invention, the terms "provide", "connect" and "couple" should be understood in a broad sense unless otherwise clearly defined or limited. For example, they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or internally connected between two parts. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0052] The technical solutions of the present invention will be further described below through specific embodiments in conjunction with the drawings.

[0053] In one specific embodiment, the present invention provides a flood light ultraviolet light concentrating catalytic hydrogen production device, which includes a hydrogen production unit, an artificial light concentrating light source unit, and a power conditioning unit, the hydrogen production unit includes a reaction tank 1 and is used for catalytically decomposing water with artificial light to prepare hydrogen gas and oxygen gas, the artificial light concentrating light source unit includes a reflecting assembly and several light-emitting assemblies, the light-emitting assembly is used for emitting artificial light, the reflecting assembly is used for reflecting and concentrating the artificial light into the reaction tank 1, and the power conditioning unit is used for providing electrical energy to the artificial light concentrating light source unit.

[0054] The flood light ultraviolet light concentrating catalytic hydrogen production device further includes a control unit, which is electrically connected to the power adjustment unit and the artificial concentrating light source unit, respectively, and feedback controls the opening and closing of the light emitting assembly and the power adjustment according to the output power of the power adjustment unit. In the present invention, various low-price and negative-price electricity is adopted for the power adjustment unit, and there is always a large fluctuation, so that such electric energy can be accessed by a voltage regulator or a current regulator to obtain an input power of constant voltage / constant current, and the control unit independently adjusts the power of the artificial concentrating light source unit according to the change in the power output power, thereby adapting to hydrogen production and energy storage using multiple types of renewable energy generation, bottom electricity, and waste electricity.

[0055] The reflection assembly includes a reflector 2 located above the reaction tank 1 and / or a reflector wall plate located on the inner wall of the reaction tank 1. The reflector 2 is a plane reflector or a hyperbolic reflector. The reflector 2 and the reflector wall plate are each independently a polished aluminum alloy plate or an aluminum-plated ultra-transparent glass. The reflector 2 and the reflector wall plate in the present invention are made of the same material. The reflector 2 and the reflector wall plate in the present invention have an ultraviolet reflectance of more than 90%, and reflect and concentrate the light flux into the reaction tank 1.

[0056] In the present invention, a transparent top plate 6 is provided on the top of the reaction tank 1. The transparent top plate 6 includes a light-transmitting ultra-transparent glass. The reflecting mirror 2 is fixed to the transparent top plate 6. The reaction tank 1 in the present invention has a closed structure, and the artificial light is reflective to the raw material solution in the reaction tank 1 under the action of each reflective wall plate to catalytically decompose water with the artificial light to form hydrogen gas. The structure of the reaction tank 1 in the present invention is not limited, and it may be a square tank body or a cylindrical tank body.

[0057] A number of the light-emitting assemblies are distributed on the surface of the reflector assembly or in the cavity of the reaction tank 1. The light-emitting assembly is a cold light source. The cold light source includes an ultraviolet LED chip 3 and / or a blue light LED chip 3. The light-emitting assemblies may be arranged in a rectangular array, a three-dimensional array, or a circular array. Those skilled in the art can obtain a light-emitting module by connecting a plurality of light-emitting assemblies in series or in parallel according to the actual situation, and a control unit can independently control the light-emitting modules to selectively switch or open or close the entire light-emitting module according to the change of the power output power of the power source. The present invention is not specifically limited to the circuit control form of the light-emitting assembly, and in order to help those skilled in the art to well understand the entire technical solution and operation process of the present invention, the present invention provides a circuit control form of a related light-emitting module as an example. In the present invention, a single LED chip 3 has a power of 10-20W and an area of ​​1-5cm 2 a steady-state voltage of a single LED chip 3 is between 3-6V, several single LED chips 3 are connected in series or in parallel to obtain a light-emitting lamp group, the power of each light-emitting lamp group is between 1-2kW and the voltage is between 24-36V, and several light-emitting lamp groups are connected in series and in parallel to obtain a light-emitting module, the power of the light-emitting module is between 0.1-0.2MW and the voltage is between 220-380V. The control unit independently controls the light-emitting lamp group and the light-emitting module, collects the power output power of the power supply in real time, and selectively opens and closes the light-emitting lamp group and / or the light-emitting module according to the change in the power output power of the power supply to adapt to the fluctuation of the input power.

[0058] In some embodiments, when the light-emitting assembly is mounted on the surface of the reflecting assembly located at the top of the reaction tank 1, several light-emitting assemblies are arranged in an array on the surface of the reflecting mirror 2, and the artificial light beams from the light-emitting assemblies and the reflected artificial light beams enter the reaction tank 1 through the transparent top plate 6.

[0059] In some embodiments, when the light emitting assembly is fixed to the inner cavity of the reaction tank 1, several light emitting assemblies are arranged in an array inside the chamber of the reaction tank 1 and immersed in the raw material solution in the reaction tank 1.

[0060] In some embodiments, when the light-emitting assembly is fixed to a reflective wall plate on the inner wall of the reaction tank 1, several light-emitting assemblies are arranged in an array on the reflective wall plate and immersed in the raw material solution in the reaction tank 1.

[0061] In some embodiments, the artificial light collecting light source unit further includes a cooling module for dissipating heat from the light emitting assembly and storing thermal energy, the cooling module being used to provide thermal energy to the reaction tank 1, the cooling form for the light emitting assembly including circulating cooling or immersion cooling.

[0062] In the present invention, the cooling module needs to be adjusted according to the position of the light-emitting assembly. When the light-emitting assembly is installed on the surface of the reflector 2 above the reaction tank 1, the cooling module is connected to the light-emitting assembly in a circulating manner to circulate and cool the light-emitting assembly. (2) When the light-emitting assembly is installed inside the reaction tank 1, the cooling module penetrates into the reaction tank 1 and immersedly cools the light-emitting assembly with the water in the reaction tank 1. The cooling module in the present invention stores the heat generated when the light-emitting assembly emits light, collects the heat, and then transmits it to the reaction tank 1 to heat and keep the water warm, which is advantageous for improving the reaction speed.

[0063] In some embodiments, the reaction tank 1 is further provided with a water inlet 4 and a gas outlet 5. The hydrogen production unit further includes a water supply module connected to the water inlet 4. The hydrogen production unit further includes a separation module. The separation module includes a drying device, a separation device and a hydrogen storage device connected in sequence to the gas outlet 5. In the present invention, pure water 7 is used as a raw material for producing hydrogen gas, and the raw material and a catalyst required for hydrogen production are fed into the reaction tank 1 through the water inlet 4, and the artificial light from the light-emitting assembly is collected in the reaction tank 1 under the reflection action or high-magnification focusing action of the reflection assembly, and the pure water 7 is decomposed into a mixed gas of hydrogen gas and oxygen gas under the action of the artificial light and the catalyst, and the mixed gas is discharged from the gas outlet 5, and a separation module is disposed in the gas outlet 5 to dry and separate the mixed gas of hydrogen gas and oxygen gas, and the hydrogen gas is introduced into a solid hydrogen storage device for storage, and high-purity hydrogen gas and oxygen gas are obtained and collected respectively.

[0064] In another specific embodiment, the present invention provides a hydrogen production method using the flood light ultraviolet light concentrating catalytic hydrogen production apparatus described in one specific embodiment, which includes providing electrical energy to an artificial light concentrating light source unit by a power conditioning unit to drive the light-emitting assembly to emit artificial light, and reflecting and concentrating the artificial light into a reaction tank 1, so that the raw material solution in the reaction tank 1 undergoes a decomposition reaction under the action of a catalyst to produce hydrogen gas.

[0065] The artificial light has a wavelength of 280-492 nm, and preferably uses an artificial ultraviolet ray having a wavelength of 360-365 nm. In the present invention, after the light-emitting assembly is energized, the artificial light is emitted and reflected, so that the artificial light is focused downward, and the intensity of the highly concentrated artificial light is 100-2500 W / m 2 The concentrated artificial light enters the hydrogen production reaction tank 1 through the transparent top plate 6 of the reaction tank 1, and under the action of the artificial light and the catalyst, the raw material is decomposed into hydrogen gas and oxygen gas and escapes from the water.

[0066] The raw solution contains pure water 7, and the temperature of the raw solution is 60 to 90° C. The raw solution further contains a catalyst, and the concentration of the catalyst is 10 to 50 mg / L. The pressure of the photolysis reaction is 0.1 to 0.3 MPa.

[0067] In some embodiments, the flood light ultraviolet light concentrating catalytic hydrogen production method further includes collecting the power supply output power of a power conditioning unit in real time, and feedback controlling the opening and closing and power adjustment of the light-emitting assembly according to fluctuations in the power supply output power.

[0068] Example 1 This embodiment provides a flood light ultraviolet light concentrating catalytic hydrogen production device, which includes a power conditioning unit, a hydrogen production unit, and an artificial concentrating light source unit. The power conditioning unit receives and conditions the low-cost bottom electricity generated by solar power, and then provides electrical energy to the artificial concentrating light source unit.

[0069] The hydrogen production unit includes a reaction tank 1. As shown in FIG. 1, the reaction tank 1 is a square tank with a cross section of 10m×10m, made of stainless steel, with a wall thickness of 5mm and a depth of 0.75m. The inner wall is provided with aluminum-plated ultra-transparent glass as a reflective wall plate, a water inlet 4 is provided at the bottom of the side wall, a gas outlet 5 is provided at the top of the side wall, a transparent top plate 6 is provided at the top of the reaction tank 1, and the ultra-transparent glass is used as a light-transmitting window to form a closed structure. Pure water 7 is poured into the reaction tank 1, and the volume of the pure water 7 is two-thirds of the volume of the reaction tank 1, and the temperature is 90° C. A strontium titanate catalyst is also added to the pure water 7, and the dispersion concentration of the strontium titanate catalyst is 50mg / L, and the strontium titanate catalyst is aluminum-doped polyhedral nanoparticles.

[0070] The artificial light collecting light source unit is located at the top of the reaction tank 1. The artificial light collecting light source unit includes a rotating hyperbolic reflector 2 with a diameter of 10 m, and is fixed to a transparent top plate 6 at the top of the reaction tank 1. As shown in FIG. 2, inside the reflector 2, 10,000 artificial ultraviolet LED chips 3 with a power of 20 W and emitting 360 to 365 nm are provided in an array. A water cooling device for cooling the LED chips 3 is provided inside the rotating hyperbolic reflector 2, and is connected to a water supply port 4 of the reaction tank 1 by a water cooling pipe.

[0071] When hydrogen is produced using the floodlight ultraviolet light concentrating catalyst hydrogen production device of this embodiment, after the artificial concentrating light source unit is energized by the power adjustment unit, the artificial light from the LED lamp array is all artificial ultraviolet light, which passes through the transparent top plate 6 under the focusing action of the hyperbolic reflector 2 and enters the pure water 7 in which the strontium titanate catalyst is dispersed, and under the action of the artificial ultraviolet light, the water is decomposed into hydrogen gas and oxygen gas, which escape from the water. After the hydrogen gas and oxygen gas are dried and separated, they are compressed and stored respectively, or introduced into a solid hydrogen storage device for storage.

[0072] In this embodiment, by using solar low-cost bottom electricity, the ultraviolet LED light-emitting chip 3 generates artificial ultraviolet light in a specific wavelength range, and the ultraviolet light-emitting array is arranged inside the rotating hyperbolic reflector 2, so that the artificial ultraviolet light from the ultraviolet light source is collected in a closed reaction tank 1 with a strontium titanate catalyst under the high-magnification focusing action of the hyperbolic reflector 2, and pure water 7 is decomposed into a mixture of hydrogen gas and oxygen gas under the high-magnification ultraviolet light and the catalytic action of strontium titanate. Hydrogen gas energy storage utilizes 80% to 90% of the solar bottom electric energy, and can efficiently store solar power generation, which is highly variable due to the influence of sunlight, as hydrogen gas energy.

[0073] Example 2 This embodiment provides a flood ultraviolet light concentrating catalytic hydrogen production device, which includes a power conditioning unit, a hydrogen production unit, and an artificial concentrating light source unit. The negative price waste electricity generated by wind power is accessed by the power conditioning unit, and after conditioning, electric energy is provided to the artificial concentrating light source unit.

[0074] The hydrogen production unit includes a reaction tank 1. As shown in FIG. 3, the reaction tank 1 is a cylindrical structure with a diameter of 30 m, made of stainless steel, with a wall thickness of 20 mm and a depth of 1.5 m. The inner wall of the reaction tank 1 is provided with micro-arc oxidized aluminum-plated ultra-transparent glass, a water inlet 4 is provided at the bottom of the side wall, a gas outlet 5 is provided at the top of the side wall, and a transparent top plate 6 is provided at the top of the reaction tank 1, which adopts ultra-transparent glass and is reinforced with an aluminum rib plate, and also serves as a light-transmitting window to form a closed structure. Pure water 7 is poured into the reaction tank 1, which occupies two-thirds of the volume and has a temperature of 60° C. A strontium titanate catalyst is also added to the pure water 7, and its dispersion concentration is 40 mg / L, and the strontium titanate catalyst is a nanoparticle doped with aluminum and cobalt.

[0075] The artificial light collecting light source unit is located at the top of the reaction tank 1. The artificial light collecting light source unit includes a flat reflecting mirror 2 with a diameter of 30 mm, and is fixed to a transparent top plate 6 at the top of the reaction tank 1. As shown in FIG. 4, inside the flat reflecting mirror 2, 100,000 ultraviolet LED chips 3 with a power of 10 W and emitting 280 to 365 nm are provided in an array. A water cooling device for cooling the LED chips 3 is provided inside the flat reflecting mirror 2, and is connected to a water supply port 4 of the reaction tank 1 by a water cooling pipe.

[0076] When hydrogen is produced using the floodlight ultraviolet light concentrating catalytic hydrogen production device of this embodiment, after the artificial concentrating light source unit is energized by the power adjustment unit, the artificial light from the LED lamp array is all artificial ultraviolet light, which passes through the transparent top plate 6 under the reflective action of the flat reflector 2 and enters the pure water 7 in which strontium titanate catalyst is dispersed. Under the catalysis of the artificial ultraviolet light, the pure water 7 is decomposed into hydrogen gas and oxygen gas, which escape from the water. The hydrogen gas and oxygen gas are then dried and separated, and then compressed and stored, or introduced into a solid hydrogen storage device for storage.

[0077] In this embodiment, by using waste electricity with negative prices during periods when wind power supply is excessive, ultraviolet LED light-emitting chips 3 generate artificial ultraviolet light in a specific wavelength range, and an ultraviolet light-emitting array is placed inside a flat reflecting mirror 2, so that the artificial ultraviolet light from the ultraviolet light source is reflected and collected in a closed reaction tank 1 having a strontium titanate catalyst, and pure water 7 is decomposed into a mixture of hydrogen gas and oxygen gas under the catalytic action of the artificial ultraviolet light and strontium titanate. Hydrogen gas energy storage utilizes 80% of wind power waste electricity, and can efficiently store the electrical energy of waste wind power generation, which is highly variable due to the influence of wind power and peak and bottom electricity, as hydrogen energy.

[0078] Example 3 This embodiment provides a flood ultraviolet light concentrating catalytic hydrogen production device, which is different from the first embodiment in that it further includes a control unit, which is electrically connected to the power adjustment unit and the artificial concentrating light source unit, and adjusts the light emission power of the LED lamp array according to the power supply power of the power adjustment unit under the control of the control unit, so that the solar power with a maximum power of 0.2MW can be converted into artificial ultraviolet light and catalytically decomposed with artificial light to produce hydrogen, and the remaining structure and parameters are the same as those of the first embodiment.

[0079] Example 4 This embodiment provides a flood ultraviolet light concentrating catalytic hydrogen production device, which is different from the embodiment 2 in that it further includes a control unit, which is electrically connected to the power adjustment unit and the artificial concentrating light source unit, and adjusts the light emission power of the LED lamp array according to the power supply power of the power adjustment unit under the control of the control unit, so that it can be adapted to convert the waste electricity of wind power generation with a maximum power of 1MW into artificial ultraviolet light and photocatalytically decompose it to produce hydrogen at low cost, and the remaining structure and parameters are the same as those of the embodiment 2.

[0080] Example 5 This embodiment provides a flood light ultraviolet light collecting catalytic hydrogen production device. The difference with the embodiment 3 is that the LED chip 3 of the artificial collecting light source unit is arranged in a three-dimensional array, fixed in the center of the inner cavity of the reaction tank 1, and immersed in water to dissipate heat from the ultraviolet LED chip 3 in water by immersion cooling, and the rest of the structure and parameters are the same as those of the embodiment 3.

[0081] Example 6 This embodiment provides a flood light ultraviolet light concentrating catalytic hydrogen production device. The difference from embodiment 3 is that the LED chips 3 of the artificial concentrating light source unit are arranged in a rectangular array and fixed to the inner wall of the reaction tank 1, while the rest of the structure and parameters are the same as those of embodiment 3.

[0082] Example 7 This embodiment provides a flood-light ultraviolet light-concentrating catalytic hydrogen production device, which includes a power conditioning unit, a hydrogen production unit, an artificial light-concentrating light source unit, and a control unit. The low-cost bottom electricity from the power bottom of the national power grid is accessed by the power conditioning unit, and after conditioning, electric energy is provided to the artificial light-concentrating light source unit. The hydrogen production unit includes a reaction tank 1, the artificial light-concentrating light source unit is located at the top of the reaction tank 1, and the control unit is electrically connected to the power conditioning unit and the artificial light-concentrating light source unit respectively.

[0083] The reaction tank 1 is a cylindrical structure with a diameter of 30 m, made of stainless steel, with a wall thickness of 20 mm and a depth of 1.5 m. The inner wall is made of mirror aluminum material that has been micro-arc oxidized, a water inlet 4 is provided at the bottom of the side wall, a gas outlet 5 is provided at the top of the side wall, a transparent top plate 6 is provided at the top of the reaction tank 1, and ultra-transparent glass is adopted and reinforced with an aluminum alloy rib plate, and a light-transmitting window is also provided to form a closed structure. Pure water 7 is poured into the reaction tank 1, and the pure water 7 occupies two-thirds of the volume, and the temperature is 70°C. Strontium titanate catalyst is also added to the pure water 7, and its dispersion concentration is 30 mg / L. The strontium titanate catalyst is a polyhedral nanoparticle doped with aluminum, cobalt, and rhodium.

[0084] The artificial light source unit includes a flat reflector 2 with a diameter of 30 m, and 100,000 LED chips 3 with a power of 10 W (artificial projected ultraviolet light with an emission wavelength range of 350 to 405 nm) are provided in an array on the inside of the flat reflector 2. A water cooling device is provided inside the rotating hyperbolic reflector 2, and is connected to the water supply port 4 of the reaction tank 1 by a water cooling pipe.

[0085] When hydrogen is produced using the floodlight ultraviolet light concentrating catalytic hydrogen production device of this embodiment, the artificial light concentrating light source unit is energized by the power adjustment unit, the LED lamp array emits artificial floodlight ultraviolet light, the artificial floodlight ultraviolet light passes through the transparent top plate 6 under the reflection of the rotating hyperbolic reflector 2 and enters the pure water 7 in which the strontium titanate catalyst is dispersed, and the pure water 7 is decomposed into hydrogen gas and oxygen gas under the catalysis of the artificial floodlight ultraviolet light, and escapes from the water, and the hydrogen gas and oxygen gas are dried and separated, and then compressed and stored, or introduced into the solid hydrogen storage device for storage. The LED lamp array adjusts the light emission power according to the power supply power by the power adjustment unit under the control of the control unit, and can be adapted to convert low-cost bottom electricity with a maximum power of 1 MW into artificial floodlight ultraviolet light to catalytically decompose water with artificial light to produce hydrogen.

[0086] In this embodiment, the LED light-emitting chip 3 generates artificial ultraviolet light in a specific wavelength range by using low-cost bottom electricity, and the LED lamp light-emitting array is arranged inside the rotating hyperbolic reflector 2, so that the artificial ultraviolet light from the light-emitting array is reflected and collected in a closed reaction tank 1 with a strontium titanate catalyst, and the pure water 7 is decomposed into a mixture of hydrogen gas and oxygen gas under the catalytic action of the artificial ultraviolet light and strontium titanate. Hydrogen gas energy storage can utilize 80% of the electrical energy of low-cost bottom electricity to convert low-cost bottom electricity into expensive hydrogen energy.

[0087] Example 8 This embodiment provides a flood light ultraviolet light concentrating catalytic hydrogen production device, which includes a power conditioning unit, a hydrogen production unit, an artificial light concentrating light source unit, and a control unit. The power of offshore wind power generation and wave power generation near a coastal island is accessed by the power conditioning unit, and after conditioning, electric energy is provided to the artificial light concentrating light source unit. The hydrogen production unit includes a reaction tank 1, the artificial light concentrating light source unit is located on the top of the reaction tank 1, and the control unit is electrically connected to the power conditioning unit and the artificial light concentrating light source unit, respectively.

[0088] The reaction tank 1 is a rectangular structure with a cross section of 20m x 10m, made of stainless steel, with a wall thickness of 15mm and a depth of 1.2m, with a mirror aluminum material that has been micro-arc oxidized on the inner wall, a water inlet 4 at the bottom of the side wall, a gas outlet 5 at the top of the side wall, a transparent top plate 6 at the top of the reaction tank 1, and ultra-transparent glass is used to form a light-transmitting window, forming a closed structure. Pure water 7 is poured into the reaction tank 1, and the pure water 7 occupies four-fifths of the volume, and the temperature is 80°C. Strontium titanate catalyst is also added to the pure water 7, and its dispersion concentration is 20mg / L, and the strontium titanate catalyst is a nanoparticle doped with aluminum, cobalt, and platinum.

[0089] The artificial light source unit includes a 20m x 10m flat reflector 2, inside which 500,000 LED chips 3 (artificial UV light with an emission wavelength range of 300-492 nm) with a power of 20 W are arranged in an array. A water cooling device is provided inside the rotating hyperbolic reflector 2, and is connected to the water supply port 4 of the reaction tank 1 by a water cooling pipe.

[0090] When hydrogen is produced using the floodlight ultraviolet light concentrating catalytic hydrogen production device of this embodiment, after the artificial concentrating light source unit is energized by the power adjustment unit, the LED lamp array emits artificial floodlight ultraviolet light, which is reflected by the rotating hyperbolic reflector 2 and passes through the transparent top plate 6 to enter the pure water 7 in which the strontium titanate catalyst is dispersed, and the pure water 7 is decomposed into hydrogen gas and oxygen gas under the catalysis of the artificial floodlight ultraviolet light, which escapes from the water, and the hydrogen gas and oxygen gas are dried and separated, and then compressed and stored, or introduced into the solid hydrogen storage device for storage. The LED lamp array adjusts the light emission power according to the power supply power by the power adjustment unit under the control of the control unit, and can be adapted to convert the electrical energy of offshore wind power generation and wave power generation with a maximum power of 10 MW into artificial floodlight ultraviolet light, and use the artificial light to catalytically decompose water to produce hydrogen.

[0091] In this embodiment, LED light-emitting chips 3 generate artificial ultraviolet light in a specific wavelength range by using electricity from offshore wind and wave power generation near a coastal island, and an ultraviolet light-emitting array is arranged inside a rotating hyperbolic reflector 2, so that the artificial ultraviolet light from the light-emitting array is reflected and collected inside a closed reaction tank 1 having a strontium titanate catalyst, and pure water 7 is decomposed into a mixture of hydrogen gas and oxygen gas under the catalytic action of the artificial ultraviolet light and strontium titanate. Hydrogen gas energy storage can utilize 80% of the island's wind and wave power generation to efficiently store the highly variable electrical energy from offshore generation as hydrogen energy.

[0092] The present invention uses concentrated artificial light to catalytically decompose water and produce hydrogen, thereby greatly reducing the volume and site area of ​​the hydrogen production vessel, far smaller than the volume and cost of an electrolytic water tank. In addition, the invention uses only pure water 7 as a raw material, operates in a fully enclosed manner, has low maintenance costs, and has a total efficiency of 60-70% for hydrogen production, and produces hydrogen with low-cost electrical energy, thereby significantly reducing the cost of hydrogen production. The temperature inside the reaction tank 1 is low and easy to control, achieving modular operation and reducing the site area. Furthermore, the power of the light source can be independently adjusted according to the fluctuation characteristics of the electrical energy, making it suitable for hydrogen production and energy storage of electricity with multiple types of fluctuation characteristics, particularly hydrogen gas energy storage using low-cost and negative-cost electricity such as renewable energy-generated electrical energy, bottom electricity, and waste electricity.

[0093] The applicant declares that the above is only a specific embodiment of the present invention, and the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any modifications or replacements that can be easily conceived within the technical scope disclosed in the present invention are all included in the protection scope and disclosure scope of the present invention.

Claims

1. The present invention includes a hydrogen production unit, an artificial light source unit, a control unit, and a power adjustment unit, The hydrogen production unit includes a reaction tank and is used for catalytically decomposing water with artificial light to prepare hydrogen gas and oxygen gas; The artificial light collecting light source unit includes a reflecting assembly and several light emitting assemblies, the several light emitting assemblies are chips arranged in an array, and is used to emit artificial light; the reflecting assembly includes a reflecting mirror located above the reaction tank, the reflecting mirror is a hyperbolic reflecting mirror, and is used to reflect and collect the artificial light into the reaction tank; The power adjusting unit is used to provide electrical energy to the artificial light-concentrating light source unit, and the control unit is electrically connected to the power adjusting unit and the artificial light-concentrating light source unit respectively, and the control unit is used to feedback control the opening / closing and power adjustment of the light-emitting assembly according to the output power of the power adjusting unit. A hydrogen production device using floodlight ultraviolet light collection and catalytic conversion.

2. The electric energy provided by the power conditioning unit is a constant voltage or a constant current.

2. The hydrogen production device according to claim 1, wherein the hydrogen production device uses a floodlight ultraviolet light collecting catalyst.

3. The reflective assembly further includes a reflective wall panel located on an inner wall of the reaction tank; The reflector and the reflector wall plate are each independently a polished aluminum alloy plate or an aluminum-plated ultra-clear glass; 2. The hydrogen production device according to claim 1, wherein the hydrogen production device uses a floodlight ultraviolet light collecting catalyst.

4. Some of the light emitting assemblies are provided on the surface of the reflecting assembly or in the cavity of the reaction tank; the light emitting assembly is an artificial cold light source; The artificial cold light source includes an ultraviolet LED chip and / or a blue light LED chip; 2. The hydrogen production device according to claim 1, wherein the hydrogen production device uses a floodlight ultraviolet light collecting catalyst.

5. The artificial light concentrating light source unit further includes a cooling module for dissipating heat from the light emitting assembly and storing thermal energy; The cooling module is used to provide a cooling form for the light-emitting assembly including a loop-connection cooling or an immersion cooling, and to provide thermal energy to the reaction tank.

2. The hydrogen production device according to claim 1, wherein the hydrogen production device uses a floodlight ultraviolet light collecting catalyst.

6. The reaction tank is further provided with a water inlet and a gas outlet, The hydrogen production unit further includes a water supply module connected to the water supply port, The hydrogen production unit further includes a separation module including a drying device, a separation device, and a hydrogen storage device, which are connected in series to the gas outlet.

2. The hydrogen production device according to claim 1, wherein the hydrogen production device uses a floodlight ultraviolet light collecting catalyst.

7. A method for producing hydrogen using the projected ultraviolet ray concentrating catalytic hydrogen production device according to any one of claims 1 to 6, comprising the steps of: Providing electrical energy to the artificial light collecting light source unit by the power adjusting unit to drive the light emitting assembly to emit artificial light, and reflecting and collecting the artificial light into the reaction tank, so that the raw material solution in the reaction tank generates an artificial photocatalytic decomposition reaction to produce hydrogen gas. A method for producing hydrogen using ultraviolet light focusing catalyst.

8. The wavelength of the artificial light is 280 to 492 nm; The raw material solution contains pure water, The temperature of the raw material solution is 60 to 90° C. The raw material solution further comprises a catalyst; The catalyst has a concentration of 10 to 50 mg / L; The pressure of the artificial photocatalytic decomposition reaction is 0.1 to 0.3 MPa; 8. The method for producing hydrogen using ultraviolet light projection and concentrating catalyst according to claim 7.

9. The power supply output power of the power adjustment unit is collected in real time, and feedback-controlled opening / closing and power adjustment of the light-emitting assembly according to the fluctuation of the power supply output power.

8. The method for producing hydrogen using ultraviolet light projection and concentrating catalyst according to claim 7.

10. Use of the flood light ultraviolet light collecting catalytic hydrogen production device according to any one of claims 1 to 6, The flood light ultraviolet light collecting catalytic hydrogen production device is used for storing hydrogen gas energy of renewable energy generation electric energy, bottom electricity, and waste electricity; 2. Use of a floodlight ultraviolet light collecting catalytic hydrogen production device.

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