Integrated electrolytic hydrogen production equipment

Abstract

The utility model relates to the field of hydrogen production equipment, in particular to integrated electrolytic hydrogen production equipment which comprises an electrolytic bath body, a plurality of groups of independent electrode pairs and a gas collecting pipe group, a partition plate is arranged in the electrolytic tank body, the electrolytic tank body is a closed tank body, the partition plate divides the electrolytic tank body into an anode chamber and a cathode chamber, and a conduction gap is formed between the bottom of the partition plate and the bottom of the electrolytic tank body; the multiple sets of independent electrode pairs are arranged at the bottom of the electrolytic cell body at intervals, each independent electrode pair comprises an anode plate and a cathode plate, the anode plates are located in the anode cavity, the cathode plates are located in the cathode cavity, a solar cell panel is arranged on the outer side of the electrolytic cell body, the anode plates are connected with the anode end of the solar cell panel, and the cathode plates are connected with the cathode end of the solar cell panel. And each solar cell panel is connected with a pair of electrodes to form an independent gas production unit. According to the hydrogen production equipment, solar energy is used as power, and hydrogen and oxygen are conveniently and rapidly produced through a simple structure and a simple method.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen production equipment field, concretely relates to integrated electrolytic hydrogen production equipment. BACKGROUND

[0002] As a secondary energy, hydrogen energy has the advantages of diverse sources, zero terminal emissions, and wide application. Under the background of carbon reduction, hydrogen energy has multiple advantages. The acquisition of hydrogen is an important link in the hydrogen energy industry chain.

[0003] There are various existing hydrogen production technologies, such as fossil fuel hydrogen production, biomass hydrogen production, and electrolytic hydrogen production. However, the above-mentioned hydrogen production methods all rely on existing energy conversion, and there is a lot of energy loss in the conversion process. Moreover, they all have the defects of high production cost, multiple production procedures, complex process, and harsh production conditions.

[0004] Among them, fossil fuel hydrogen production also produces a large amount of greenhouse gases such as carbon dioxide, which has no development momentum under the background of carbon reduction. Biomass hydrogen production not only has low yield but also high cost. Electrolytic water hydrogen production is a relatively environmentally friendly hydrogen production method, but it has high energy consumption and requires a large amount of electricity support, which is costly and has no commercial value. The cost of power electrolysis is high, and photovoltaic power generation is used to solve the problem of electricity in the present industrial hydrogen production. However, the photovoltaic water electrolysis scheme still has two major problems, which restrict the reduction of hydrogen production cost to the level of popularization. The two major problems are: 1. The influence of photovoltaic power fluctuation on hydrogen production cost reduction; 2. The influence of meeting the safety working conditions of large-scale electrolytic tank on hydrogen production cost reduction.

[0005] In the present industrial photovoltaic water electrolysis hydrogen production, 1. Fluctuating photovoltaic power is converted into stable direct current power through a complex process of power collection, power storage, power transformation, and control, so that the electrolytic tank can work continuously and stably, thereby solving the problem of the influence of photovoltaic power fluctuation on hydrogen production. This process requires a large number of equipment investment and generates high cost; 2. Large-scale alkaline electrolytic tank has large volume, high precision, and harsh safety working conditions, resulting in high cost; the working temperature of the equipment is usually 70-90℃, and if the hydrogen production is restarted after shutdown, it needs to be preheated to the working temperature in advance, so it has the problem of difficult hydrogen production startup.

[0006] For a perfect proton exchange membrane electrolytic tank, its bipolar plate, gas diffusion layer, proton exchange membrane, and electrode catalyst are the core components that can only work under strong corrosive conditions using a small number of precious metal materials such as gold, platinum, and iridium, which has a high cost.

[0007] For a solid oxide electrolytic tank that has been conquered, it usually operates at 800-1000℃, which puts high requirements on equipment materials, production conditions, and equipment stability, resulting in high cost and immature technology.

[0008] In summary, the current industrial electrolytic hydrogen production method involves large equipment, requires more cost (including energy cost, equipment cost, etc.) in the hydrogen production process, and is relatively complex, has high technical requirements (such as the need to strictly control the temperature, current, voltage and other parameters of the work), is not easy to implement, and is not convenient for popularization and commercial use. Practical new type content

[0009] The utility model intends to provide a kind of integrated electrolytic hydrogen production equipment, with solar energy as power, can effectively overcome the influence of fluctuating power on hydrogen production (the hydrogen production process of the equipment can be self-adaptively adjusted according to power fluctuation, so the influence of power fluctuation on hydrogen production is relatively small), and also can make the water electrolysis hydrogen production equipment start and stop automatically according to illumination conditions. With simple structure and method, hydrogen and oxygen are conveniently and quickly generated.

[0010] To achieve the above object, the utility model adopts the following technical scheme: an integrated electrolytic hydrogen production equipment, comprising,

[0011] Electrolytic tank body, the electrolytic tank body is provided with a baffle, the electrolytic tank body is closed tank body, the baffle separates the electrolytic tank body into anode chamber and cathode chamber, and the bottom of the baffle and the bottom of the electrolytic tank body have a conduction gap;

[0012] Multiple groups of independent electrode pairs, the multiple groups of independent electrode pairs are spaced apart and arranged at the bottom of the electrolytic tank body, the independent electrode pair includes an anode plate and a cathode plate, the anode plate is located in the anode chamber, the cathode plate is located in the cathode chamber, the outer side of the electrolytic tank body is provided with a solar cell panel, the anode plate is connected with the positive electrode end of the solar cell panel, and the cathode plate is connected with the negative electrode end of the solar cell panel;

[0013] Gas collection pipe group, the gas collection pipe group includes an anode collection pipe and a cathode collection pipe, the anode collection pipe is communicated with the anode chamber, and the cathode collection pipe is communicated with the cathode chamber;

[0014] Gas pressure control valve, the gas pressure control valve is used to balance the gas pressure of the anode chamber and the cathode chamber.

[0015] The principle and advantages of the present application are as follows: the utility model separates the electrolytic tank body into anode chamber and cathode chamber by arranging a baffle in the electrolytic tank body, and the bottom of the baffle and the electrolytic tank body have a conduction gap. By injecting electrolyte, the anode plate and the cathode plate can be connected. The setting of the baffle can make the oxygen generated on the anode chamber electrode and the hydrogen generated on the cathode chamber electrode automatically separate due to the upward movement in the electrolyte solution, so as to avoid mixing.

[0016] The application can reduce the distance between the anode plate and the cathode plate as much as possible under the premise that the gas generated on the two plates cannot be mixed, thereby reducing the resistance between the anode plate and the cathode plate, improving the energy conversion rate, and reducing the energy loss.

[0017] The anode plate and the cathode plate in the application are directly powered by the solar cell panel. The electric energy generated by the solar cell panel can easily make the anode plate and the cathode plate conductive to prepare gas. Therefore, when the solar cell panel receives light or receives strong light, the solar cell panel will generate a certain amount of electric energy, and the solar cell panel will power the anode plate and the cathode plate. At this time, the anode plate and the cathode plate will work under the condition of being electrified to generate corresponding gas, thereby realizing the self-starting of the device for preparing gas. When the solar cell panel does not receive light or receives weak light, a certain amount of electric energy will not be generated on the solar cell panel, and the anode plate and the cathode plate will not work under the condition of being electrified to generate corresponding gas. The device is in a closed state. Therefore, the hydrogen production device in the application can automatically switch on and off according to the light of the sun on the solar cell panel. The on-off is convenient and easy, and does not need too much manual intervention and control, and is simple and convenient to operate.

[0018] Because the device in the application has a small volume and contains a small amount of electrolyte solution, the concentration field and the temperature field are easy to be uniform, and preheating is not required. The electrode works under low temperature, voltage and current requirements. Therefore, the electric energy generated by the solar cell panel after receiving light can make the anode plate and the cathode plate work to prepare gas. Compared with the prior art, whether the light is strong or weak, whether it is cloudy or sunny, and whether the light fluctuates, the anode plate and the cathode plate can work to prepare gas, and the hydrogen production self-starting is easy. In the prior art, even if a solar cell panel is used for hydrogen production, because the electrolytic tank is large and contains a large amount of electrolyte solution, the concentration field and the temperature field are difficult to be uniform, and preheating for 30-40 minutes is usually required. Therefore, it cannot be started and stopped at will. Because of high precision, the electrolytic tank works under stable voltage and current, so it cannot be directly powered by fluctuating solar cell panels. It is necessary to go through a complex process of power collection, power transformation, power storage and control to change the fluctuating current and voltage generated by the solar cell panel into stable current and voltage to meet the safe working requirements of the electrolytic tank. Therefore, the light fluctuation has relatively small influence on hydrogen production in the application. When the light fluctuates, the device can also work by self-adjustment without the need for high cost to overcome the influence of light fluctuation, thereby realizing the direct preparation of gas by using the electric energy generated by the solar cell panel.

[0019] The electric energy used by the anode plate and the cathode plate in the application directly comes from the solar panel. Compared with the existing hydrogen production method in the industry, there is no need for long-distance power transmission and power collection, power transformation, power control and other equipment, so the cost of the equipment is greatly reduced. At the same time, the equipment and the independent electrode pair in the application use conventional materials, compared with the prior art, there is no need to use electrode catalyst, gas diffusion material, diaphragm and the like, which can greatly save the cost. At the same time, the solar clean energy is used, and the cost is low.

[0020] The plurality of independent electrode pairs in the electrolytic tank in the application are independent gas production units, and the hydrogen production between the gas production units does not interfere with each other. Although the hydrogen production of a single independent electrode pair is small, the difficulty of gas production of a single independent electrode pair is very small, and it is easy to realize, the technical difficulty is low, the hydrogen production can be operated at normal temperature, and is not limited by temperature, and the hydrogen production process is automatically converted according to the sunlight condition, which is convenient for popularization and implementation.

[0021] The gas produced by the plurality of independent electrode pairs in the single hydrogen production equipment in the application is limited, and cannot meet the demand of a task with a large gas consumption. The number of hydrogen production equipment can be increased, and the gas in each gas collecting pipe can be collected into a gas collecting main pipe to meet various use requirements.

[0022] In the application, the solar panel is used to supply power to the electrode pair, and the cost of the solar panel accounts for about 90% of the total cost of hydrogen production. Renewable energy is used to greatly reduce the cost of hydrogen production. The hydrogen production method in the application operates at normal temperature, and there is no case of taking out alkaline electrolyte with high-temperature gas, so relatively pure hydrogen and oxygen can be obtained, and separation and purification are usually not needed in the later stage.

[0023] The gas pressure control valve in the application controls the gas pressure of the anode chamber and the cathode chamber, ensures that the gas pressure of the anode chamber and the cathode chamber is equal, and avoids mixing of hydrogen and oxygen due to pressure difference.

[0024] In summary, the hydrogen production equipment in the application has simple structure, is easy to manufacture and implement, does not need to use complex and high-cost materials, overcomes many problems of the existing electrolytic tank, and uses simple structure and method to conveniently and quickly produce hydrogen and oxygen. The quality of the produced gas is good, the cost is low, the number of equipment used can be selected according to actual requirements, the demand of different use scenes can be met, the application is applied to industry or life, and the application prospect is wide.

[0025] Preferably, as an improvement, the cathode collecting pipe is provided with a hydrogen drying area or a hydrogen purification area. The hydrogen drying area or the hydrogen purification area is arranged in the cathode collecting pipe, the hydrogen can be further purified or dried, dry or purified hydrogen can be obtained, and the gas quality and collection efficiency are improved.

[0026] Preferably, as an improvement, each independent electrode pair is connected to 1-3 solar cell panels in series.

[0027] Thus, each group of independent electrode pairs can be connected to 1-3 solar cell panels according to actual conditions, when the electricity generated by a solar cell panel is enough to make a group of independent electrode pairs work at a better efficiency, each group of independent electrode pairs can be connected to one solar cell panel, if the electricity generated by a solar cell panel is not enough to make a group of independent electrode pairs work at a better efficiency, multiple solar cell panels in series, such as 2, 3, etc., can be connected to a group of independent electrode pairs.

[0028] Preferably, as an improvement, each solar cell panel is connected to 1-3 groups of independent electrode pairs.

[0029] Similarly, each solar cell panel is connected to 1-3 groups of independent electrode pairs, when the electricity generated by a solar cell panel is enough to make a group of independent electrode pairs work at a better efficiency, each group of independent electrode pairs can be connected to one solar cell panel, if the electricity generated by a solar cell panel is more, a solar cell panel can be connected to more groups of independent electrode pairs to supply power to multiple groups of independent electrode pairs to make them work, for example, a solar cell panel is connected to 2 or 3 groups of independent electrode pairs, etc.

[0030] Preferably, as an improvement, each solar cell panel is connected to 1 group of independent electrode pairs.

[0031] Although a solar cell panel can be connected to multiple groups of independent electrode pairs, and a group of independent electrode pairs can be connected to multiple solar cell panels in series, it is better to connect one group of independent electrode pairs to one solar cell panel, because in this way, multiple pairs of independent electrode pairs are connected to one solar cell panel respectively, which makes the influence between multiple groups of independent electrode pairs in the electrolytic tank smaller, and the independence of multiple groups of independent electrode pairs better, which further ensures that the hydrogen production units do not interfere with each other. When one of the solar cell panels does not work, only the independent electrode pairs connected to it will not work, and other independent electrode pairs will not be disturbed, the independent electrode pairs are less disturbed, thereby ensuring normal hydrogen production.

[0032] Preferably, as an improvement, the distance between the anode plate and the partition plate is 0.5-1 cm, and the distance between the cathode plate and the partition plate is 0.5-1 cm.

[0033] Preferably, as an improvement, the hydrogen drying area includes a first mesh plate, and a hydrogen drying agent bag is arranged on the first mesh plate.

[0034] The hydrogen purification zone comprises a limiting ring fixed to the inner wall of the cathode collecting pipe, and an absorbent package is placed on the limiting ring; or the hydrogen purification zone is provided with a gas washing structure for being immersed in the purification liquid, and the gas washing structure comprises a plurality of gas channel holes.

[0035] Preferably, as an improvement, the anode collecting pipe is provided with an oxygen drying zone, and the oxygen drying zone comprises a second mesh plate on which an oxygen drying agent package is placed.

[0036] Preferably, as an improvement, the anode collecting pipe and the cathode collecting pipe are respectively provided with a gas valve.

[0037] Preferably, as an improvement, the top of the anode collecting pipe and the cathode collecting pipe is provided with a threaded connection port.

[0038] Preferably, as an improvement, the sidewall of the electrolytic cell body is provided with a liquid injection pipe port. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The overall structure schematic diagram of the integrated electrolytic hydrogen production equipment provided by the embodiment of the present application is shown in the figure;

[0040] Figure 2 The side view sectional view of the integrated electrolytic hydrogen production equipment provided by the embodiment of the present application is shown in the figure;

[0041] Figure 3 The front view sectional view of the integrated electrolytic hydrogen production equipment provided by the embodiment of the present application is shown in the figure;

[0042] Figure 4 The overall structure schematic diagram of the integrated electrolytic hydrogen production equipment provided by the embodiment of the present application is shown in the figure; Figure 2 The enlarged schematic diagram of the structure at A in the figure is shown in the figure;

[0043] Figure 5 The structure schematic diagram of the U-shaped pipe part in the embodiment 3 is shown in the figure. DETAILED DESCRIPTION

[0044] The following will be further described in detail through specific embodiments:

[0045] The reference signs in the attached drawings of the specification include: electrolytic cell body 100, anode chamber 110, cathode chamber 120, conducting gap 130, liquid injection pipe port 140, independent electrode pair 200, anode plate 210, anode terminal post 211, cathode plate 220, cathode terminal post 221, gas collecting pipe group 300, anode collecting pipe 310, oxygen drying zone 311, second mesh plate 312, oxygen drying agent package 313, cathode collecting pipe 320, hydrogen drying zone 321, hydrogen purification zone 322, first mesh plate 323, limiting ring 324, hydrogen drying agent package 325, absorbent package 326, gas valve 330, partition plate 400, solar cell panel 500, gas inlet pipe 1, gas outlet pipe 2, and fine pipe 3.

[0046] Example 1

[0047] The basics are as follows: Figures 1-4 As shown: An integrated electrolytic hydrogen production device includes an electrolytic cell body 100 (equipment shell), multiple sets of independent electrode pairs 200, and a gas collection pipe group 300;

[0048] The electrolytic cell 100 is equipped with a partition 400. When the electrolytic cell 100 is rectangular, its length can be set to 30-100cm and its width can be set to 10-20cm. Of course, the size of the electrolytic cell is not limited to these. The electrolytic cell 100 is a closed cell. The partition 400 divides the electrolytic cell 100 into an anode chamber 110 and a cathode chamber 120, and there is a conductive gap 130 between the bottom of the partition 400 and the bottom of the electrolytic cell 100.

[0049] Multiple sets of independent electrode pairs 200 are spaced apart at the bottom of the electrolytic cell 100 along the length of the electrolytic cell 100. Each independent electrode pair 200 includes an anode plate 210 and a cathode plate 220. The anode plate 210 is located in the anode chamber 110, and the cathode plate 220 is located in the cathode chamber 120. The anode plate 210 is connected to the positive terminal of the solar panel 500 located outside the electrolytic cell 100 through an anode terminal 211 passing through the bottom of the electrolytic cell 100. The cathode plate 220 is connected to the negative terminal of the solar panel 500 located outside the electrolytic cell 100 through a cathode terminal 221 passing through the bottom of the electrolytic cell 100.

[0050] The gas collection pipe assembly 300 is located at the top of the electrolytic cell body 100. The gas collection pipe assembly 300 includes an anode collection pipe 310 and a cathode collection pipe 320. The anode collection pipe 310 is connected to the anode chamber 110 and has an oxygen drying zone 311 inside. The cathode collection pipe 320 is connected to the cathode chamber 120 and has a hydrogen drying zone 321 and a hydrogen purification zone 322 arranged from bottom to top inside. The anode collection pipe 310 and the cathode collection pipe 320 are respectively equipped with a gas pressure control valve.

[0051] The following will further describe an integrated electrolysis hydrogen production device according to this exemplary embodiment.

[0052] In some embodiments of this application, the electrolytic cell 100 is provided with a partition 400. The electrolytic cell 100 is a closed cell. The partition 400 divides the electrolytic cell 100 into an anode chamber 110 and a cathode chamber 120. There is a conductive gap 130 between the bottom of the partition 400 and the bottom of the electrolytic cell 100. That is, the top and both sides of the partition 400 are connected to the electrolytic cell 100 (e.g., welded). The bottom of the partition 400 is suspended, so that after the electrolyte is injected into the electrolytic cell 100, the anode chamber 110 and the cathode chamber 120 can be connected to each other and an electrolytic reaction can occur. Multiple sets of independent electrode pairs 200 are spaced apart at the bottom of the electrolytic cell 100 along its length. Each independent electrode pair 200 includes an anode plate 210 and a cathode plate 220. The anode plate 210 is located in the anode chamber 110, and the cathode plate 220 is located in the cathode chamber 120. The anode plate 210 is connected to the positive terminal of the solar panel 500 located outside the electrolytic cell 100 via an anode terminal 211 passing through the bottom of the electrolytic cell 100. The cathode plate 220 is connected to the negative terminal of the solar panel 500 located outside the electrolytic cell 100 via a cathode terminal 221 passing through the bottom of the electrolytic cell 100. When energized, current flows from the positive terminal of the solar panel 500 through the wire to the anode plate 210, then from the anode plate 210 through the electrolyte solution to the cathode plate 220, and finally from the cathode plate 220 back to the negative terminal of the solar panel 500 through the wire, forming a closed loop, and an electrolytic reaction occurs on the electrode surface. The anode plate 210 and cathode plate 220 are connected and electrically via solar panels 500. Each pair of independent electrodes 200 is connected to a single solar panel 500. Multiple pairs of independent electrodes 200 are arranged within an electrolyzer 100, each connected to multiple solar panels 500, forming multiple independent gas-producing units. Each pair of independent electrodes 200 does not affect the others; one solar panel does not affect the power supply to other solar panels 500, thus not affecting the electrolysis hydrogen production efficiency of other independent electrode pairs 200. By using solar panels 500 as the power source for the electrode pairs, the cost of solar panels 500 accounts for approximately 90% of the total hydrogen production cost. Utilizing renewable energy, this method has the advantages of low cost and low energy consumption.

[0053] Experiments have shown that hydrogen gas can be generated at a voltage of 1.2V. The solar panel 500, under illumination, easily reaches the voltage required to generate gas at the electrodes. Therefore, using the solar panel 500 facilitates the generation of gas by energizing the electrodes. This application uses a separator 400 to separate the anode chamber 110 and the cathode chamber 120, preventing the mixing of hydrogen and oxygen generated during electrolysis. While ensuring that the gases generated on the two electrodes do not mix, the distance between the anode plate 210 and the cathode plate 220 can be minimized as much as possible to reduce the resistance between the electrodes and improve the energy conversion rate.

[0054] In practical use, during the day, the solar panels convert solar energy into electrical energy and power the electrode plates, causing them to automatically start producing gas. The produced gas is then collected and used. At night, the solar panels stop receiving sunlight and supply power, and the electrode plates cease producing hydrogen. Therefore, the hydrogen production equipment in this embodiment can automatically start and stop according to sunlight conditions without manual control, making operation simple and convenient. This application can operate at room temperature and is not limited by temperature, avoiding the removal of electrolyte impurities, such as sodium hydroxide in alkaline electrolytes, by the gas under high temperatures, thus resulting in high-quality gas that does not require subsequent separation and purification. This application integrates multiple sets of independent gas-producing units into a single electrolytic cell 100. Each electrode pair produces a small volume of gas, which adds up to a large volume of hydrogen, allowing for the production of high-quality hydrogen with a simple structure. This method is low-cost, highly efficient, and produces relatively pure gas.

[0055] As a preferred implementation, the materials used for the independent electrode pair 200 can be conventional materials, such as inert cast iron, gray cast iron, etc. These materials are inexpensive and significantly reduce costs.

[0056] In a preferred embodiment, the anode plate 210 and cathode plate 220 of each electrode pair are opposite each other, and the distance between the two opposing anode plates 210 and cathode plates 220 and the partition plate 400 is 1cm-2cm. Therefore, setting the distance between the anode plate 210 and cathode plate 220 to be small reduces the inter-electrode resistance, thereby reducing the amount of current flowing through and converting it into heat energy, and improving the conversion rate of solar energy to hydrogen energy.

[0057] In some embodiments of this application, the gas collection pipe assembly 300 is located at the top of the electrolytic cell 100. The gas collection pipe assembly 300 includes an anode collection pipe 310 and a cathode collection pipe 320. The anode collection pipe 310 is connected to the anode chamber 110 and contains an oxygen drying zone 311. The cathode collection pipe 320 is connected to the cathode chamber 120 and contains a hydrogen drying zone 321 and a hydrogen purification zone 322 from bottom to top. By setting the gas collection pipe at the top of the electrolytic cell 100, since the electrolytic cell 100 is vertically installed and the gas density is less than that of the electrolyte, the gas moves upwards under buoyancy. Hydrogen and oxygen are automatically separated and, influenced by the partition 400, enter the cathode collection pipe 320 and the anode collection pipe 310 respectively for further purification, obtaining a gas with higher purity, and then drying the gas. In some embodiments, multiple sets of anode collection tubes 310 and cathode collection tubes 320 are evenly distributed on the top of the electrolytic cell 100, so that the gas generated by each pair of independent electrodes 200 can enter multiple collection tubes for drying or purification, thereby improving collection efficiency.

[0058] In a preferred embodiment, the hydrogen drying zone 321 includes a first mesh plate 323 welded or snapped into the cathode collecting tube 320. A hydrogen desiccant pack 325 is mounted on the first mesh plate 323, and the hydrogen desiccant pack 325 may contain activated alumina. The activated alumina further dehydrates the hydrogen, utilizing its strong water absorption properties to dry the hydrogen. The hydrogen purification zone 322 includes a limiting ring 324 fixed (welded or snapped) to the inner wall of the cathode collecting tube 320. An absorbent pack 326 is placed on the limiting ring 324, and the absorbent pack 326 may contain activated carbon. The activated carbon further purifies and filters the hydrogen, improving its purity. The width of the hydrogen desiccant pack 325 is smaller than the inner diameter of the limiting ring 324, while the width of the absorbent pack 326 is larger than the inner diameter of the limiting ring 324. By setting the first mesh plate 323, the hydrogen desiccant pack 325 is placed on the first mesh plate 323, and its width is smaller than the upper limiting ring 324, which makes it easy to replace with tools such as clamps. By setting the limiting ring 324, and the width of the absorbent pack 326 is larger than the diameter of the limiting ring 324, the absorbent pack 326 can be placed on the limiting ring 324 without falling down, and it is easy to replace.

[0059] In a preferred embodiment, the oxygen drying zone 311 includes a second mesh plate 312, which is welded or snapped into the anode collecting tube 310. An oxygen desiccant pack 313 is placed on the second mesh plate 312. The oxygen desiccant pack 313 may contain a desiccant such as fixed sodium hydroxide or fixed calcium oxide for drying oxygen, so as to obtain dry oxygen.

[0060] In a preferred embodiment, the cathode collecting pipe 320 and the anode collecting pipe 310 are equipped with pressure control valves. These valves prevent pressure discrepancies between the anode chamber 110 and the cathode chamber 120, thus avoiding mixing of hydrogen and oxygen due to the pressure difference. Gas valves 330 are also provided on the anode collecting pipe 310 and the cathode collecting pipe 320, with each valve positioned near the end of the electrolytic cell 100. By providing a gas valve 330 on each collecting pipe, the on / off state of each pipe can be independently controlled. When replacing the material package or performing maintenance, only the corresponding gas valve 330 needs to be closed, without affecting the gas collection of other collecting pipes.

[0061] In a preferred embodiment, the tops of the anode collecting pipe 310 and the cathode collecting pipe 320 are provided with threaded connection ports. By setting the tops of the collecting pipes as threaded connection ports, they can be used to connect to the gas pipe interface of the gas collecting tank (or gas bag), and the threaded connection facilitates disassembly and connection. To improve sealing performance, sealing structures such as sealing rings can be provided at the interface.

[0062] In a preferred embodiment, the lower part of the side wall of the electrolytic cell 100 is provided with a liquid injection port 140. The liquid injection port 140 is equipped with a control switch and is used to connect to a liquid injection pipe or other electrolytic cells. By providing a liquid injection port 140 on the lower part of the side wall of the electrolytic cell 100, it is convenient to add electrolyte. Alternatively, multiple liquid injection ports 140 of different electrolytic cells 100 can be connected in series by a conduit for overall liquid injection. Since it is located in the lower part rather than the upper part, liquid sealing can be achieved through the electrolyte inside the electrolytic cell 100, reducing equipment control costs.

[0063] During the research process, the inventors conducted experiments in Chongqing. In the experiments, the area of ​​each anode plate and cathode plate immersed in the liquid was 11 square centimeters. A 20W solar panel and a 100W solar panel were connected to a pair of independent electrodes respectively. Under cloudy conditions, hydrogen bubbles were generated on the electrodes, which shows that even under cloudy weather conditions, the solar panel can provide power to enable the independent electrode pair to generate hydrogen.

[0064] In some embodiments, the anode plate and cathode plate in this application are not necessarily rectangular, but may also be cylindrical, circular, or other shapes, and their shapes can be arbitrarily set. The specific size of the surface area of ​​the anode and cathode plates immersed in the liquid depends on the power of the solar panel. For example, when using a 100W solar panel as the power source, and the electrolyte solution is a saturated NaOH solution at 20°C, the hydrogen production efficiency is best when the surface area of ​​both the anode and cathode plates immersed in the liquid is 13 square centimeters. This not only ensures the hydrogen production efficiency but also allows for the use of less electrode material. In the above case, if the electrode area (the area immersed in the liquid) is less than 13 square centimeters, the electrons donated by the cathode plate cannot leave in time due to the generated hydrogen gas, hindering the hydrogen ions from gaining electrons and becoming hydrogen gas, thus reducing the hydrogen production efficiency. Similarly, if the electrode area is greater than 13 square centimeters, when the cathode plate donates electrons, the hydrogen ions can gain electrons on a larger area than 13 square centimeters, ensuring that there are always hydrogen ions that can accept the electrons donated by the electrode and become hydrogen gas in time, thus ensuring the highest hydrogen production efficiency. However, this will result in relatively more electrode material consumption. Therefore, in this case, an electrode immersion area of ​​13 square centimeters is preferable. Of course, if the 100W solar panel is replaced with a 330W or 670W panel, the optimal area of ​​the electrode immersed in the liquid needs to be adjusted. For example, with a 670W solar panel, the optimal area of ​​the electrode immersed in the liquid is approximately 312 square centimeters. If the area is smaller than this, the hydrogen production efficiency will decrease; if it is larger, the cost of the electrode material will increase. Therefore, there is no specific limitation on the surface area of ​​the electrode. The surface area can be adjusted according to different application scenarios and different solar panels to ensure optimal gas production efficiency.

[0065] It should be noted that the electrolytic hydrogen production equipment of this application has a simple structure and low cost. It can be integrated into several independent electrolytic hydrogen production units for industrial hydrogen or oxygen production, or into a few independent electrolytic hydrogen production units for domestic hydrogen or oxygen production. In actual use, the specifications of the solar panels and the size of the hydrogen production equipment can be designed according to the specific scale of use.

[0066] For example, this equipment has the following application scenarios: small-scale gas production: suitable for use as clean fuel in rural areas, grasslands, and islands by individual households. Using a 20KW (200 x 100W) solar panel with a capacity of 500 mm, the daily hydrogen production is approximately 10 m³. 3The generated hydrogen is collected in a 10-cubic-meter gasbag, which is then connected to a gas stove, water heater, etc. The hydrogen produced during the day can meet the daily gas needs of an average household. Another example is medium-scale gas production: suitable for small towns, used as a clean fuel. Depending on the needs, a scale of 500 solar panels (e.g., 20,000-50,000 100W solar panels) can be selected. Due to the increased hydrogen production, it can be appropriately pressurized and stored (low-pressure storage of hydrogen does not require high-quality storage materials) for later use. Gas production can be centralized, and then distributed at low pressure. The byproduct oxygen can be compressed and filled into medical cylinders for use in local hospitals. Furthermore, in areas with insufficient solar energy, the hydrogen produced in this application can be mixed with natural gas for supply. Another example is large-scale production of high-purity hydrogen and oxygen: in areas with good solar energy, such as Inner Mongolia, Xinjiang, and Tibet; hydrogen power plants can be built using barren beaches, deserts, and other desert areas, producing hydrogen during the day and generating electricity at night to balance the national power grid. High-purity hydrogen and oxygen can be directly used as industrial raw materials; "green hydrogen" and "green oxygen" can be directly supplied to chemical systems to produce high-end chemical products such as polyethylene and polypropylene. Large-scale chlor-alkali industrial production bases can also be built, replacing the conductive gap between the partition and the bottom of the electrolytic cell with an ion exchange membrane, using saturated brine as the electrolyte, to produce industrial products such as hydrogen, chlorine, and sodium hydroxide on a large scale. Therefore, the integrated electrolytic hydrogen production equipment of this application is highly practical, easy to implement, and has a wide range of applications.

[0067] Example 2

[0068] In practical use, the anode collection pipes 310 of multiple integrated electrolytic hydrogen production devices are connected to a common oxygen collection manifold. Oxygen generated by each integrated electrolytic hydrogen production device enters the oxygen collection manifold for collection, aggregation, and transmission. Similarly, the cathode collection pipes 320 of multiple integrated electrolytic hydrogen production devices are connected to a common hydrogen collection manifold. Hydrogen generated by each integrated electrolytic hydrogen production device enters the hydrogen collection manifold for collection, aggregation, and transmission. Furthermore, pressure control valves can be installed on both the oxygen and hydrogen collection manifolds. This eliminates the need for pressure control valves on each anode collection pipe 310 and cathode collection pipe 320 of each integrated electrolytic hydrogen production device, significantly reducing the number of pressure control valves required.

[0069] Example 3

[0070] The difference between this embodiment and Embodiment 1 lies in the hydrogen purification method. In this embodiment, the hydrogen purification zone 322 is equipped with a U-shaped tube. One side of the U-shaped tube is the inlet pipe 1, and the other side is the outlet pipe 2. The inlet pipe 1 is connected to the cathode chamber 120. Specifically, the U-shaped tube in this embodiment can be part of the cathode collecting pipe 320, or it can be connected to the cathode collecting pipe 320 independently. In this case, the inlet pipe 1 and the cathode collecting pipe 320 are connected. Water is provided at the bottom of the U-shaped tube. The outlet pipe 2 is internally connected to a gas washing structure. The gas washing structure includes multiple vertical thin tubes 3 (the so-called thin tube 3 refers to the thin tube 3 having a diameter smaller than the outlet pipe 2, and each thin tube constitutes a gas passage hole). The thin tube 3 can be a lumen or an independent tube, and the lower ends of the multiple thin tubes 3 are inserted into the water.

[0071] Therefore, the gas generated in the cathode chamber 120 enters the inlet pipe 1. The hydrogen gas exerts pressure on the liquid, thus forcing the liquid to the right into the outlet pipe 2. Most of the liquid enters the water outlet pipe above the thin tube 3 through the thin tube 3. Then, the gas passes through the thin tube 3 and rises from multiple thin tubes 3, forming small bubbles, and finally exits from the outlet pipe 2 through the liquid. The reason for using multiple thin tubes 3 in this embodiment is that the thin tubes 3 can reduce the volume of the gas, making the gas bubbles smaller. Smaller bubbles are easier to form, and the contact area between the bubbles and the liquid is larger, thus allowing the water to wash the sodium hydroxide more thoroughly.

[0072] Example 4

[0073] The difference between this embodiment and Embodiment 1 lies in the hydrogen purification method. In this embodiment, the hydrogen purification zone 322 is equipped with a gas washing bottle containing water. The long tube in the gas washing bottle serves as the inlet tube and is inserted into the water, while the short tube serves as the outlet tube, positioned above the water surface. The inlet tube is connected to the cathode chamber 120. Specifically, in this embodiment, the water inlet tube can be part of the cathode collecting tube 320 or can be connected separately to the cathode collecting tube 320. The end of the inlet tube (the end furthest from the cathode chamber 120) is connected to a gas washing structure. In this embodiment, the gas washing structure is a porous sphere submerged in water. The porous sphere has multiple air passages, the diameter of which is smaller than the diameter of the inlet tube.

[0074] Therefore, the gas generated in the cathode chamber 120 enters the inlet pipe and then passes through the porous ball into the water. The gas flows out from the multiple pores of the porous ball, forming small bubbles, and finally exits from the outlet pipe through the liquid. The porous ball is used in this embodiment because its multiple pores reduce the gas volume, resulting in smaller bubbles. Smaller bubbles are easier to form, and their larger contact area with the liquid allows for more thorough washing of the sodium hydroxide. After washing, the gas flows out from the outlet pipe and is collected or utilized elsewhere.

[0075] Example 5

[0076] This embodiment compares the hydrogen production equipment of this application with that of Baofeng Energy to illustrate how this equipment can significantly reduce costs in hydrogen production.

[0077] Baofeng Energy's complete photovoltaic hydrogen production industry chain can be divided into three main stages: photovoltaic power generation, water electrolysis hydrogen production, and hydrogen storage and application.

[0078] 1. Photovoltaic power generation stage

[0079] 1-1 Solar Energy Harvesting: Large-area solar energy is collected through solar panels and other equipment and efficiently converted into electrical energy for subsequent hydrogen production.

[0080] 1-2 Power Conversion and Transmission: The solar panels generate direct current (DC), which is converted into alternating current (AC) by inverters and other equipment. The AC is then transmitted through power lines to the area where the water electrolysis hydrogen production unit is located, where it is converted back into DC. During this process, it is necessary to ensure the stability and efficiency of power transmission and reduce power loss during transmission.

[0081] 2. Hydrogen production stage via water electrolysis

[0082] 2-1 Water pretreatment: Water is usually purified by methods such as filtration and ion exchange to ensure the purity of the water entering the electrolytic cell.

[0083] 2-2 Electrolysis Reaction: Pretreated water enters the electrolytic cell, where it is decomposed into hydrogen and oxygen under the action of direct current. Baofeng Energy uses a high-efficiency alkaline electrolytic cell for hydrogen production. During the electrolysis process, parameters such as current, voltage, and temperature need to be strictly controlled to ensure the stable progress of the electrolysis reaction.

[0084] 2-3 Gas Separation and Collection: The hydrogen and oxygen produced by electrolysis need to be separated by separation equipment. The hydrogen is collected for storage or further processing, while the oxygen can be stored or discharged as needed.

[0085] 3. Hydrogen storage and application stage

[0086] 3-1 Hydrogen Storage: The produced hydrogen needs to be stored for later use. Storage methods include high-pressure gaseous storage and liquid storage. High-pressure gaseous storage is currently the more common method, requiring the use of high-pressure storage tanks to store hydrogen; liquid storage requires cooling the hydrogen to extremely low temperatures to make it liquid for easy storage and transportation.

[0087] 3-2 Hydrogen Applications: Baofeng Energy directly supplies its produced green hydrogen to its chemical system, replacing the gray hydrogen generated in traditional coal-to-hydrogen processes, for the production of high-end chemical products. In addition, hydrogen can be widely used in high-purity silicon production, hydrogen fuel cell vehicles, the electronics industry, the metallurgical industry, combined heat and power (CHP), and energy storage.

[0088] This application also divides photovoltaic hydrogen production into three similar stages and compares their costs with those of Baofeng Energy's complete photovoltaic hydrogen production industry chain. The cost of the third stage, "hydrogen storage and application stage," is exactly the same as that of Baofeng Energy's third stage. In the first stage, this application simply replaces all the equipment in Baofeng Energy's first stage with the same number of solar panels, eliminating the need for related power conversion and transmission equipment. In the second stage, this application simply replaces all the equipment in Baofeng Energy's second stage with "an integrated electrolysis hydrogen production device," eliminating the need for insulation equipment, voltage stabilization equipment, separation equipment, etc. Therefore, apart from the cost of the solar panels, this application only calculates the cost of the electrodes and the container holding the electrodes (electrolyzer). The equipment structure is simple, and other costs are minimal, thus significantly reducing the overall cost.

[0089] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An integrated electrolysis hydrogen production device, characterized in that: include, An electrolytic cell body is provided with a partition inside the electrolytic cell body. The electrolytic cell body is a closed cell body. The partition divides the electrolytic cell body into an anode chamber and a cathode chamber. There is a conductive gap between the bottom of the partition and the bottom of the electrolytic cell body. Multiple sets of independent electrode pairs are spaced apart at the bottom of the electrolytic cell. Each independent electrode pair includes an anode plate and a cathode plate. The anode plate is located in the anode chamber, and the cathode plate is located in the cathode chamber. A solar panel is provided on the outside of the electrolytic cell. The anode plate is connected to the positive terminal of the solar panel, and the cathode plate is connected to the negative terminal of the solar panel. A gas collection tube assembly, comprising an anode collection tube and a cathode collection tube, wherein the anode collection tube is connected to the anode chamber; and the cathode collection tube is connected to the cathode chamber. A pneumatic control valve is used to balance the pneumatic pressure in the anode chamber and the cathode chamber.

2. The integrated electrolysis hydrogen production equipment according to claim 1, characterized in that: The cathode collection tube is equipped with a hydrogen drying zone or a hydrogen purification zone.

3. The integrated electrolysis hydrogen production equipment according to claim 1, characterized in that: Each independent electrode pair is connected to 1-3 solar panels, or each solar panel is connected to 1-3 sets of independent electrode pairs.

4. The integrated electrolysis hydrogen production equipment according to claim 3, characterized in that: Each solar panel is connected to one set of independent electrode pairs.

5. An integrated electrolysis hydrogen production device according to claim 1, characterized in that: The distance between the anode plate and the partition is 0.5cm-1cm, and the distance between the cathode plate and the partition is 0.5cm-1cm.

6. An integrated electrolysis hydrogen production device according to claim 2, characterized in that: The hydrogen drying zone includes a first mesh plate, on which a hydrogen desiccant pack is provided; The hydrogen purification zone includes a limiting ring fixed to the inner wall of the cathode collecting tube, and an absorbent pack is placed on the limiting ring; or, the hydrogen purification zone is provided with a gas washing structure for immersion in the purification solution, and the gas washing structure includes multiple gas channels.

7. An integrated electrolysis hydrogen production device according to claim 1, characterized in that: The anode collecting tube is provided with an oxygen drying zone, which includes a second mesh plate on which an oxygen desiccant pack is placed.

8. An integrated electrolysis hydrogen production device according to claim 1, characterized in that: Gas valves are respectively provided on the anode collecting tube and the cathode collecting tube.

9. An integrated electrolysis hydrogen production device according to claim 1, characterized in that: The top of the anode collecting tube and the cathode collecting tube are provided with threaded connection ports.

10. An integrated electrolysis hydrogen production device according to claim 1, characterized in that: The side wall of the electrolytic cell is provided with a liquid injection port.

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