Efficient water photolysis hydrogen production system and device thereof

Abstract

The invention discloses an efficient water photolysis hydrogen production system and a device thereof, relates to the technical field of water photolysis hydrogen production, and aims to solve the problem of low photolysis efficiency in the traditional water photolysis hydrogen production technology, the efficient water photolysis hydrogen production system comprises a frame, a plurality of groups of reaction tubes are arranged on the inner wall of the frame, and every two adjacent groups of reaction tubes are communicated with each other; a plurality of fixing frames are fixedly connected to the inner wall of the frame, the reaction pipes are fixedly connected with the fixing frames respectively, a transfer bin is arranged in the frame, the group of reaction pipes located on the foremost side are communicated with the interior of the transfer bin respectively, and a circulating pipe communicated with the interior of the transfer bin is fixedly connected to the outer wall of the transfer bin. The inner wall of the frame is fixedly connected with a connecting piece, the other end of the connecting piece is fixedly connected with the outer wall of the transfer bin, the outer wall of the frame is fixedly connected with a plurality of supports, and the bottoms of the supports are fixedly connected with an annular base. The method has the advantage of effectively improving the hydrogen production efficiency and effect through water photolysis.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production by photocatalytic water splitting, and more specifically, to an efficient hydrogen production system and device for photocatalytic water splitting. Background Art

[0002] With the intensification of the global energy crisis and the continuous improvement of environmental protection awareness, the development of clean and renewable energy has become an important task for countries around the world. Hydrogen, as a clean energy with zero pollution and high energy density, is regarded as an ideal carrier for future energy. The technology of hydrogen production by photocatalytic water splitting uses solar energy to decompose water into hydrogen and oxygen, which is an important way to realize the conversion of solar energy to chemical energy and has broad application prospects. However, in the technology of hydrogen production by photocatalytic water splitting, there is a problem of low efficiency, and the low photocatalytic efficiency is the key factor restricting its large-scale application and popularization. In view of this, we propose an efficient hydrogen production system and device for photocatalytic water splitting. Summary of the Invention

[0003] The purpose of the present invention is to provide an efficient hydrogen production system and device for photocatalytic water splitting, aiming to solve the problem of low photocatalytic efficiency in traditional hydrogen production technology by photocatalytic water splitting.

[0004] To solve the above technical problems, the present invention provides the following technical solution: An efficient hydrogen production device for photocatalytic water splitting, including a frame, wherein a plurality of reaction tubes are arranged on the inner wall of the frame, and two adjacent reaction tubes are communicated with each other. A plurality of fixing frames are fixedly connected to the inner wall of the frame, and the reaction tubes are respectively fixedly connected to the fixing frames. A transfer bin is arranged inside the frame, and a group of reaction tubes located at the frontmost side are respectively communicated with the inside of the transfer bin. A flow pipe communicated with the inside of the transfer bin is fixedly connected to the outer wall of the transfer bin. A connecting piece is fixedly connected to the inner wall of the frame, and the other end of the connecting piece is fixedly connected to the outer wall of the transfer bin. A plurality of brackets are fixedly connected to the outer wall of the frame, and a circular base is fixedly connected to the bottom of the brackets.

[0005] Preferably, the reaction tubes are inclined, and two adjacent reaction tubes are arranged in sequence downward, forming a multi-layer and multi-column arrangement.

[0006] Preferably, the reaction tubes are both of double-layer light-transmitting structures. The outer layer of the reaction tube is made of high light transmittance glass material, and the inner layer of the reaction tube is quartz glass coated with an antireflection film.

[0007] An efficient hydrogen production system for photocatalytic water splitting, the system includes any one of the above-mentioned efficient hydrogen production devices for photocatalytic water splitting, and the system further includes a filtering device, a molecular sieve, a photocatalyst, a condenser and a magnetic field generating device;

[0008] The filtering device is used to filter and purify water, so as to ensure the efficiency and stability during water photocatalytic splitting;

[0009] The molecular sieve is used to separate hydrogen and oxygen generated by photolysis of water.

[0010] The photocatalyst is a mixture of nano-titanium dioxide powder and a dispersant.

[0011] The condenser is arranged between the water photolysis device and the molecular sieve, and is used for condensing the steam generated by the water photolysis reaction.

[0012] The magnetic field generating device is used to generate an alternating magnetic field, which is used to promote the dispersion of the photocatalyst in water during water photolysis and accelerate the separation of electron-hole pairs in the water photolysis reaction.

[0013] Preferably, the particle size of the nano-titanium dioxide powder in the photocatalyst is 20 - 50 nanometers, the dispersant is polyvinylpyrrolidone, and the mass ratio of the nano-titanium dioxide powder to the dispersant is 1:0.1 - 1:0.5.

[0014] Preferably, the molecular sieve adopts a hollow fiber membrane structure, the membrane pore size of the hollow fiber membrane is 0.1 - 1 nm, and a selective adsorption coating is loaded on its surface to improve the separation efficiency of hydrogen and oxygen.

[0015] Preferably, the filtration device includes a coarse filtration unit, a fine filtration unit and an ion exchange filtration unit. The coarse filtration unit is used to remove larger particle impurities in water, the fine filtration unit is used to further filter tiny particles and suspended substances in water, and the ion exchange filtration unit is used to remove metal ions in water.

[0016] Preferably, it further includes a light source, and the light source is an ultraviolet lamp with a wavelength range of 250 - 400 nanometers, which is used to improve the photolysis efficiency.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. By adopting multi-layer, multi-column and inclined double-layer light-transmitting reaction tubes and combining with a light source with a wavelength range of 250 - 400 nanometers, the present invention greatly increases the contact area between light and the photocatalyst and the light intensity. The catalyst uses nano-titanium dioxide powder and polyvinylpyrrolidone dispersant, and the particle size of the nano-titanium dioxide powder is specified as 20 - 50 nanometers, and the mass ratio of the two is controlled at 1:0.1 - 1:0.5. This ratio and particle size design enable the photocatalyst to be fully dispersed in water, exert the maximum catalytic activity, and further improve the reaction effect of water photolysis for hydrogen production. At the same time, the alternating magnetic field generated by the magnetic field generating device can effectively promote the dispersion of the photocatalyst in water and accelerate the separation of electron-hole pairs in the water photolysis reaction. Acting synergistically from multiple dimensions, it solves the problem of low photolysis efficiency in traditional water photolysis for hydrogen production technology and lays a foundation for its large-scale application and popularization.

[0019] 2. The filtration device in the present invention includes a coarse filtration unit, a fine filtration unit, and an ion exchange filtration unit, which can sequentially remove large particle impurities, fine particles and suspended solids, and metal ions in water, comprehensively purify the water, ensure the purity of the reaction environment during water photolysis, reduce the interference of impurities on the photolysis reaction, and thus maintain the efficiency and stability.

[0020] 3. In the present invention, the molecular sieve adopts a hollow fiber membrane structure with a membrane pore size of 0.1 - 1 nm, and a selective adsorption coating is loaded on the surface. This special structure and coating design can accurately separate the hydrogen and oxygen generated by water photolysis, effectively improve the separation efficiency of hydrogen and oxygen, and facilitate the subsequent collection and utilization of hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the device in the present invention;

[0022] Figure 2 It is a cross-sectional view of the reaction tube in the present invention;

[0023] Figure 3 It is a schematic architecture diagram of the system in the present invention.

[0024] Description of the reference numerals in the drawings:

[0025] 1. Frame; 2. Reaction tube; 3. Fixing bracket; 4. Transfer bin; 5. Flow pipe; 6. Connector; 7. Support; 8. Base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Embodiment 1

[0028] As Figure 1-2 shown, a high-efficiency water photolysis hydrogen production device includes a frame 1. A plurality of reaction tubes 2 are arranged on the inner wall of the frame 1, and two adjacent reaction tubes 2 are interconnected. A plurality of fixing brackets 3 are fixedly connected to the inner wall of the frame 1, and the reaction tubes 2 are respectively fixedly connected to the fixing brackets 3. A transfer bin 4 is arranged inside the frame 1. The reaction tubes 2 in the frontmost group are respectively communicated with the inside of the transfer bin 4. A flow pipe 5 communicated with the inside thereof is fixedly connected to the outer wall of the transfer bin 4. A connector 6 is fixedly connected to the inner wall of the frame 1, and the other end of the connector 6 is fixedly connected to the outer wall of the transfer bin 4. A plurality of supports 7 are fixedly connected to the outer wall of the frame 1, and a circular base 8 is fixedly connected to the bottom of the supports 7.

[0029] Specifically, the annular base 8 is used to support the bracket 7, the bracket 7 is used to support the frame 1, and the frame 1 supports the fixing frame 3, so that the fixing frame 3 fixes the reaction tube 2 inside the frame 1. The reaction tubes 2 are interconnected. The connecting piece 6 is fixed inside the frame 1, and the other end of the connecting piece 6 is fixedly connected to the outer wall of the transfer bin 4, thereby fixing the transfer bin 4 inside the frame 1. The inside of the transfer bin 4 is respectively communicated with the inside of a group of reaction tubes 2 located at the frontmost side. The outer wall of the transfer bin 4 is also fixedly connected with a flow pipe 5 communicated with its inside. In this way, water can be added into the transfer bin 4 from the flow pipe 5, and then gradually diverted from the transfer bin 4 into the reaction tubes 2. The water is photolyzed by multiple groups of reaction tubes 2, further increasing the contact degree of water with light during photolysis and enhancing the photolysis efficiency and effect. The hydrogen and oxygen generated after the photolysis reaction of water can return to the transfer bin 4 along the original path and then be discharged through the flow pipe 5 for convenient collection and treatment.

[0030] Further, the reaction tubes 2 are inclined, and adjacent two groups of reaction tubes 2 are arranged downward in sequence, forming a multi-layer and multi-column arrangement.

[0031] Specifically, the reaction tubes 2 arranged in multi-layers, multi-columns and inclinedly greatly increase the light contact area and light intensity, thereby further enhancing the photolysis efficiency and effect.

[0032] Further, the reaction tubes 2 are all of double-layer light-transmitting structures. The outer layer of the reaction tube 2 is made of high light transmittance glass material, and the inner layer of the reaction tube 2 is quartz glass coated with an antireflection film.

[0033] Specifically, the double-layer light-transmitting structure adopted by the reaction tubes 2 is a key link to improve the hydrogen production efficiency. The high light transmittance glass in the outer layer greatly reduces the reflection loss when light is incident, allowing as much light as possible to enter the reaction tube 2. The quartz glass coated with an antireflection film in the inner layer has more advantages and can make more light energy penetrate into the reaction tube 2, thereby further increasing the photolysis efficiency and effect.

[0034] As Figure 3 shown, a high-efficiency water photolysis hydrogen production system includes any one of the above high-efficiency water photolysis hydrogen production devices. The system also includes a filtering device, a molecular sieve, a photocatalyst, a condenser and a magnetic field generating device;

[0035] The filtering device is used to filter and purify water, thereby ensuring the efficiency and stability during water photolysis;

[0036] The molecular sieve is used to separate the hydrogen and oxygen generated by water photolysis;

[0037] The photocatalyst is a mixture of nano-titanium dioxide powder and a dispersant;

[0038] The condenser is arranged between the photolytic water splitting device and the molecular sieve, and is used for condensing the steam generated by the photolytic water splitting reaction;

[0039] The magnetic field generating device is used to generate an alternating magnetic field, which is used to promote the dispersion of the photocatalyst in water during photolytic water splitting and accelerate the separation of electron-hole pairs in the photolytic water splitting reaction.

[0040] Specifically, the water is purified by a filtration device, and then a photocatalyst is added to the water to mix the photocatalyst with the water. Then, the water mixed with the photocatalyst is added to the high-efficiency photolytic water splitting hydrogen production device mentioned above. The high-efficiency photolytic water splitting hydrogen production device mentioned above carries out photolysis on it to generate hydrogen and oxygen. And in this process, not only an alternating magnetic field is generated by the magnetic field generating device to promote the dispersion of the photocatalyst in water during photolytic water splitting and accelerate the separation of electron-hole pairs in the photolytic water splitting reaction, thereby increasing the photolysis reaction during photolytic water splitting, but also the steam generated by the photolytic water splitting reaction is condensed by the condenser, and the molecular sieve separates hydrogen and oxygen, thus completing the production of hydrogen by photolytic water splitting.

[0041] Further, the particle size of the nano-titanium dioxide powder in the photocatalyst is 20 - 50 nanometers, the dispersant is polyvinylpyrrolidone, and the mass ratio of the nano-titanium dioxide powder to the dispersant is 1:0.1 - 1:0.5.

[0042] Specifically, the photocatalyst is selected as a mixture of 20 - 50nm nano-titanium dioxide powder and polyvinylpyrrolidone in a mass ratio of 1:0.1 - 1:0.5, so that the nano-titanium dioxide powder is evenly dispersed in water, fully exposed to the light environment, greatly increasing the contact area and reaction probability between light and the catalyst. Moreover, the suspended nano-titanium dioxide can absorb light energy more efficiently, exciting more photo-generated electron-hole pairs, thereby significantly improving the reaction effect of hydrogen production by photolytic water splitting.

[0043] Further, the molecular sieve adopts a hollow fiber membrane structure, the membrane pore diameter of the hollow fiber membrane is 0.1 - 1nm, and a selective adsorption coating is loaded on its surface to improve the separation efficiency of hydrogen and oxygen.

[0044] Specifically, the molecular sieve with a hollow fiber membrane structure is adopted, and the membrane pore diameter is set to 0.1 - 1nm, and a selective adsorption coating is loaded on the surface, significantly improving the separation efficiency of hydrogen and oxygen. More gas separation channels can be provided per unit volume, enabling the mixed gas to quickly diffuse into the membrane.

[0045] Further, the filtration device includes a coarse filtration unit, a fine filtration unit, and an ion exchange filtration unit. The coarse filtration unit is used to remove larger particle impurities in the water, the fine filtration unit is used to further filter out tiny particles and suspended substances in the water, and the ion exchange filtration unit is used to remove metal ions in the water.

[0046] Specifically, the coarse filtration unit, the fine filtration unit, and the ion exchange filtration unit are progressive layer by layer, which not only avoids the coverage of the active sites of the photocatalyst by impurities, but also eliminates the interference of metal ions on the water photolysis reaction, improves the operation stability of the water photolysis device, and increases the hydrogen production efficiency.

[0047] Furthermore, it also includes a light source, which is an ultraviolet lamp with a wavelength range of 250 - 400 nanometers, used to improve the photolysis efficiency.

[0048] Specifically, the stable ultraviolet light irradiation ensures the continuous and efficient progress of the water photolysis reaction, significantly accelerates the rate of water decomposition to produce hydrogen and oxygen, and greatly improves the overall hydrogen production efficiency.

[0049] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. An efficient photocatalytic hydrogen production device, characterized in that: The invention comprises a frame (1), wherein the inner wall of the frame (1) is provided with a plurality of groups of reaction tubes (2), and two adjacent groups of the reaction tubes (2) are connected to each other; the inner wall of the frame (1) is fixedly connected with a plurality of fixing frames (3), and the reaction tubes (2) are respectively fixedly connected to the fixing frames (3); a transfer bin (4) is arranged inside the frame (1), and a group of the reaction tubes (2) located at the front side are respectively connected to the interior of the transfer bin (4); the outer wall of the transfer bin (4) is fixedly connected with a flow pipe (5) connected to the interior thereof; the inner wall of the frame (1) is fixedly connected with a connecting piece (6), and the other end of the connecting piece (6) is fixedly connected with the outer wall of the transfer bin (4); the outer wall of the frame (1) is fixedly connected with a plurality of brackets (7), and the bottom of the bracket (7) is fixedly connected with an annular base (8).

2. The high-efficiency photocatalytic water splitting hydrogen production device according to claim 1, characterized in that: The reaction tubes (2) are arranged obliquely, and two adjacent groups of reaction tubes (2) are arranged downward in sequence to form a multi-layer and multi-row arrangement.

3. The high-efficiency photocatalytic water hydrogen production device according to claim 1, characterized in that: The reaction tubes (2) are all double-layer light-transmitting structures, the outer layer of the reaction tubes (2) is made of high-transmittance glass, and the inner layer of the reaction tubes (2) is made of quartz glass coated with an anti-reflection film.

4. A high-efficiency photolysis water hydrogen production system, comprising a high-efficiency photolysis water hydrogen production device as described in any one of claims 1 to 3, characterized in that: The system also includes a filtering device, a molecular sieve, a photocatalyst, a condenser and a magnetic field generating device; The filtering device is used to filter and purify water, thereby ensuring the efficiency and stability of water photolysis; The molecular sieve is used to separate hydrogen and oxygen produced by photolysis of water; The photocatalyst is a mixture of nano titanium dioxide powder and a dispersant; The condenser is arranged between the photolysis water device and the molecular sieve, and is used to condense the steam generated by the photolysis water reaction; The magnetic field generating device is used to generate an alternating magnetic field to promote the dispersion of the photocatalyst in water during photolysis of water and to accelerate the separation of electron-hole pairs in the photolysis of water reaction.

5. The high-efficiency photolysis water hydrogen production system according to claim 4, characterized in that: The particle size of the nano titanium dioxide powder in the photocatalyst is 20-50 nanometers, the dispersant is polyvinyl pyrrolidone, and the mass ratio of the nano titanium dioxide powder to the dispersant is 1:0.1-1:0.

5.

6. The high-efficiency photocatalytic water splitting hydrogen production system according to claim 4, characterized in that: The molecular sieve adopts a hollow fiber membrane structure. The membrane pore size of the hollow fiber membrane is 0.1-1 nm, and a selective adsorption coating is loaded on its surface to improve the separation efficiency of hydrogen and oxygen.

7. The high-efficiency photolysis water hydrogen production system according to claim 4, characterized in that: The filtering device comprises a coarse filtering unit, a fine filtering unit and an ion exchange filtering unit. The coarse filtering unit is used to remove larger particle impurities in water, the fine filtering unit is used to further filter tiny particles and suspended matter in water, and the ion exchange filtering unit is used to remove metal ions in water.

8. The high-efficiency photolysis water hydrogen production system according to claim 4, characterized in that: It also includes a light source, which is an ultraviolet lamp with a wavelength range of 250-400 nanometers, and is used to improve the photolysis efficiency.

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