High-pressure microchannel liquid-coated hydrogen storage system and control method thereof

Abstract

The invention belongs to the technical field of hydrogen storage, and particularly relates to a high-pressure micro-channel liquid-coated hydrogen storage system and a control method of the high-pressure micro-channel liquid-coated hydrogen storage system. An inlet of the gas-liquid supercharger is connected with a liquid source and the hydrogen storage container, and an outlet is connected with the pressure maintaining tank; the pressure maintaining tank is connected with the micro-channel liquid-coated hydrogen device; the micro-channel liquid-coated hydrogen device is connected with a product storage tank; the micro-channel liquid-coated hydrogen device comprises an upper flow channel body and a lower flow channel body; the first end of the upper runner body is connected with the pressure maintaining tank, the second end is connected with the first end of the lower runner body, and the second end of the lower runner body is connected with the product storage tank; the lower runner body is composed of a flow dividing cavity, a flow guide pipe and a jet pipe which are sequentially connected and sequentially reduced in pipe diameter. Compared with the prior art, the invention solves the problems of high preparation cost and short storage time at normal temperature and pressure in the nano-bubble hydrogen storage technology. According to the scheme, high-pressure driving and micro-channel technologies are combined, and hydrogen is stored at normal temperature and normal pressure.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage, and in particular relates to a high-pressure microchannel liquid-coated hydrogen storage system and a control method thereof. Background Art

[0002] Nanobubble hydrogen storage technology is a method of physically encapsulating hydrogen in nano-sized bubbles and using liquid coating to achieve safe and efficient storage and transportation. The principle is to encapsulate hydrogen molecules in nanobubbles through the interfacial tension of the liquid medium; due to the significant Brownian motion of nanobubbles and the double-layer repulsion formed by the surface charge, they can be stably suspended in the liquid for days or even months, avoiding rapid aggregation or rupture. Based on the unique properties of nanobubbles, nanobubble hydrogen storage technology has the characteristics of high stability and high dissolution efficiency. It is an emerging means of efficient hydrogen storage and has broad application prospects in hydrogen agriculture (such as irrigation), hydrogen medicine (such as targeted therapy) and clean energy (such as fuel cell hydrogen storage).

[0003] Currently, nanobubble hydrogen storage technology can be divided into three categories: physical method, electrochemical method and material loading method. The physical method mainly uses mechanical shearing, turbulent tube decompression or ultrasonic cavitation to cut the gas into nano-sized bubbles, such as the nanobubble physical hydrogen dissolution technology used by Nano Barber's nanobubble hydrogen-rich water machine; the electrochemical method is to electrolyze water on the electrode surface to produce hydrogen, and combine the ultrasonic field to promote the detachment and nano-size of the bubbles, such as the ultrasonic and electrochemical combination method disclosed in "Ultrasonic Assisted Electrolysis Enables Massive Production of Hydrogen Bulk Nanobubbles, Journal of Colloid and Interface Science, 695"; the material loading method uses hydrophobic materials to adsorb hydrogen and form interfacial nanobubbles to achieve the effect of nanobubble hydrogen storage. For example, in the scheme of an integrated hydrogen production and storage method and device disclosed in CN1986894A, hydrogen nanobubbles are generated by electrochemical methods on the atomically flat high-order pyrolytic graphite surface.

[0004] However, the current methods still have problems such as high preparation cost and short storage time at room temperature and pressure, which makes nanobubble hydrogen storage technology still difficult to promote and apply in actual environments. Therefore, it is necessary to further propose a low-cost nanobubble hydrogen storage technology suitable for actual environments. Summary of the Invention

[0005] The present invention aims to address at least one of the aforementioned issues by providing a high-pressure microchannel liquid-coated hydrogen storage system and control method. This system addresses the high production costs and short storage time of existing nanobubble hydrogen storage technologies at room temperature and pressure. This solution combines high-voltage drive with microchannel technology to develop a high-pressure microchannel device that generates liquid-coated nanobubbles of hydrogen, enabling hydrogen storage at room temperature and pressure.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The first aspect of the present invention discloses a high-pressure microchannel liquid-coated hydrogen storage system, comprising a gas pressure supply assembly, a gas-liquid booster, a liquid source, a hydrogen storage container, a pressure-maintaining tank, a microchannel liquid-coated hydrogen device, and a product storage tank;

[0008] The air pressure supply assembly is connected to the gas-liquid booster, and the air pressure supply assembly is used to supply and control the pressure of the gas-liquid booster; the inlet of the gas-liquid booster is respectively connected to the liquid source and the hydrogen storage container, and the outlet of the gas-liquid booster is connected to the pressure-maintaining tank; the pressure-maintaining tank is connected to the inlet of the microchannel liquid-coated hydrogen device, and a control valve is provided on the pipeline between the pressure-maintaining tank and the microchannel liquid-coated hydrogen device; the outlet of the microchannel liquid-coated hydrogen device is connected to the product storage tank;

[0009] The microchannel liquid-coated hydrogen device includes an upper flow channel body and a lower flow channel body; the first end of the upper flow channel body is connected to the pressure-maintaining tank, the second end of the upper flow channel body is connected to the first end of the lower flow channel body, and the second end of the lower flow channel body is connected to the product storage tank; the lower flow channel body is composed of a diverter cavity, a guide tube and a jet tube connected in sequence, wherein the diameters of the diverter cavity, the guide tube and the jet tube decrease in sequence (wherein the minimum diameter can be set to about 1 mm); the upper flow channel body and the lower flow channel body are both microchannels.

[0010] Preferably, the air pressure supply assembly includes an air compressor;

[0011] The air compressor is connected to the gas-liquid supercharger, and an air intake switch is provided on the pipeline between the air compressor and the gas-liquid supercharger; the air compressor is used to provide compressed air to the gas-liquid supercharger.

[0012] Preferably, the air pressure supply assembly further includes a gas pressure gauge and a filter pressure reducing valve;

[0013] The gas pressure gauge and the filter pressure reducing valve are sequentially arranged on the pipeline between the air compressor and the gas-liquid supercharger.

[0014] Preferably, the control valve is a pneumatic needle valve;

[0015] The air compressor is connected to the control valve, and a mechanical reversing valve is provided on the pipeline between the air compressor and the control valve.

[0016] Preferably, a filter and an inlet check valve are sequentially arranged on the pipeline between the liquid source and the gas-liquid booster. The filter filters impurities in the liquid entering the system and protects the internal components of the system from contamination and wear.

[0017] Preferably, a pressure reducing valve and a gas one-way valve are sequentially provided on the pipeline between the hydrogen storage containers;

[0018] The hydrogen storage container is a hydrogen pressure tank.

[0019] Preferably, the inlet of the gas-liquid booster is connected to the liquid source and the hydrogen storage container respectively through a gas-liquid tee.

[0020] Preferably, an outlet one-way valve is provided on the pipeline between the outlet of the gas-liquid booster and the pressure-maintaining tank.

[0021] Preferably, the outlet of the gas-liquid booster is provided with a high-pressure pressure gauge; the pressure-maintaining tank is provided with a pressure-maintaining tank pressure gauge; and the product storage tank is provided with a product pressure gauge; to ensure stable operation of the system and detect the sealing effect of the microchannel liquid-coated hydrogen device.

[0022] Preferably, the upper flow channel body and the lower flow channel body are made of 316L stainless steel, and the upper flow channel body and the lower flow channel body are sealed by high-pressure static sealing technology (high-strength bolt fastening kit and metal sealing gasket).

[0023] The second aspect of the present invention discloses a control method for a high-pressure microchannel liquid-coated hydrogen storage system as described above.

[0024] The liquid from the liquid source and the hydrogen from the hydrogen storage container are mixed and enter the gas-liquid booster. The gas-liquid booster pressurizes the mixed fluid under the action of the air pressure supply component. The pressurized fluid enters the pressure maintaining tank for pressure maintenance.

[0025] When the control valve is opened, high-pressure gas-liquid two-phase flow enters the microchannel liquid-coated hydrogen device. The gas-liquid two-phase flow is gradually accelerated and pressurized by the diversion cavity, guide tube and jet tube in the microchannel liquid-coated hydrogen device, and then the liquid-coated hydrogen is achieved through mutual collision. The fluid rich in hydrogen is then collected in the product storage tank.

[0026] The gas-liquid booster preferably converts compressed air from the pneumatic supply assembly into high-pressure hydraulic pressure at a compression ratio of 510:1 (approximately the area ratio of the large and small pistons in the gas-liquid booster). This means that for every 0.1 MPa increase in compressed air pressure, the system increases pressure by 51 MPa. Adjusting the filter pressure reducing valve allows precise control of the optimal pressure for the liquid-encapsulated hydrogen, ensuring stable storage of the hydrogen in the liquid.

[0027] The working principle of the present invention is:

[0028] A microchannel device is a miniaturized fluid control system that can be used for microfluidic manipulation and analysis. Microchannels are typically micron or nanometer-sized. At this tiny scale, high-pressure, high-speed microjets create collisions between gas and liquid phases, breaking up large bubbles to form nanoscale hydrogen bubbles. This allows for long-term storage of hydrogen in the liquid, enabling pipeline transport and storage.

[0029] During the operation of the system, low-pressure fluid from the liquid source enters the gas-liquid booster through the inlet one-way valve, and hydrogen from the hydrogen storage container enters the gas-liquid booster through the pressure reducing valve and the gas one-way valve; the compressed air provided by the air compressor drives the piston of the gas-liquid booster to pressurize the mixed fluid after the gas pressure is controlled by the filtering pressure reducing valve, and the pressurized fluid enters the pressure maintaining tank through the outlet one-way valve for pressure maintenance; when the control valve is opened by the mechanical reversing valve, the high-pressure gas-liquid two-phase flow enters the microchannel liquid-coated hydrogen device and collides to form nano-hydrogen bubbles, realizing liquid-coated hydrogen, and finally the fluid rich in hydrogen is collected in the product storage tank.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The patent of this invention proposes a high-pressure microchannel liquid-coated hydrogen storage system, which combines high-pressure drive and microchannel technology to achieve uniform and long-term stable storage of nano-hydrogen bubbles in liquid at room temperature and pressure. Furthermore, when applied, the flow advantages of the liquid can be utilized to realize long-distance pipeline-based hydrogen transportation.

[0032] The present invention has the properties of high pressure resistance, strong airtightness, good liquid hydrogen coating performance, and high generation efficiency. By optimizing the microchannel structure design (the sizes of the diversion cavity, the guide tube and the jet tube are gradually reduced), the liquid hydrogen coating efficiency is greatly improved, and the coating effect is enhanced.

[0033] The system and method of the present invention mainly consume energy and save costs by using pressure equipment. Compared with existing preparation methods, both energy consumption and equipment costs are lower. In addition, since the present solution combines microchannel technology to coat hydrogen bubbles, tests show that after being placed at room temperature for 48 hours, its Zeta potential (which can reflect stability) can still maintain more than 80% of the initial value, and after being placed at room temperature for 120 hours, its Zeta potential can still maintain more than 60% of the initial value. This shows that the nano hydrogen bubbles prepared by this solution can maintain a high nano hydrogen bubble content over a long storage time at room temperature and have excellent stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the high-pressure microchannel liquid-coated hydrogen storage system;

[0035] Figure 2 This is the physical structure diagram of the high-pressure microchannel liquid-coated hydrogen storage system;

[0036] Figure 3 It is a structural schematic diagram of a microchannel liquid-encapsulated hydrogen device;

[0037] Figure 4 This is the effect diagram of the product after being coated with hydrogen by this system at 250MPa;

[0038] Figure 5 This is a graph showing the change in Zata potential of the product after being coated with hydrogen by this system at 25°C and 200 MPa after being placed for different times;

[0039] In the figure: 1. Air compressor; 2. Gas pressure gauge; 3. Filter pressure reducing valve; 4. Air inlet switch; 5. Gas-liquid booster; 6. Liquid source; 7. Filter; 8. Inlet check valve; 9. Gas-liquid three-way valve; 10. Hydrogen storage container; 11. Pressure reducing valve; 12. Gas check valve; 13. Outlet check valve; 14. Pressure maintaining tank; 15. Control valve; 16. Mechanical reversing valve; 17. Microchannel liquid-coated hydrogen device; 18. Product storage tank; 19. Diversion chamber; 20. Guide pipe; 21. Jet pipe; 22. Upper flow channel body; 23. Lower flow channel body. DETAILED DESCRIPTION

[0040] The purpose of the present invention is to provide a high-pressure microchannel liquid-coated hydrogen technology in order to overcome the technical difficulties existing in technologies such as high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, and solid hydrogen storage. By combining high-pressure drive with microchannel technology, a high-pressure microchannel experimental device is developed to generate liquid-coated nano hydrogen bubbles, thereby realizing the storage of hydrogen at room temperature and pressure. The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Features such as component models, material names, connection structures, control methods, algorithms, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0041] Example 1

[0042] A high-pressure microchannel liquid-coated hydrogen storage system, such as Figure 1-3 As shown, it includes a gas pressure supply component, a gas-liquid booster 5, a liquid source 6, a hydrogen storage container 10, a pressure maintaining tank 14, a microchannel liquid-coated hydrogen device 17 and a product storage tank 18;

[0043] The air pressure supply assembly is connected to the gas-liquid booster 5, and the air pressure supply assembly is used to supply and control the pressure of the gas-liquid booster 5; the inlet of the gas-liquid booster 5 is connected to the liquid source 6 and the hydrogen storage container 10 respectively, and the outlet of the gas-liquid booster 5 is connected to the pressure-maintaining tank 14; the pressure-maintaining tank 14 is connected to the inlet of the microchannel liquid-coated hydrogen device 17, and a control valve 15 is provided on the pipeline between the pressure-maintaining tank 14 and the microchannel liquid-coated hydrogen device 17; the outlet of the microchannel liquid-coated hydrogen device 17 is connected to the product storage tank 18;

[0044] The microchannel liquid-coated hydrogen device 17 includes an upper flow channel body 22 and a lower flow channel body 23; the first end of the upper flow channel body 22 is connected to the pressure-maintaining tank 14, the second end of the upper flow channel body 22 is connected to the first end of the lower flow channel body 23, and the second end of the lower flow channel body 23 is connected to the product storage tank 18; the lower flow channel body 23 is composed of a diverter cavity 19, a guide tube 20 and a jet tube 21 connected in sequence, wherein the diameters of the diverter cavity 19, the guide tube 20 and the jet tube 21 decrease in sequence; the upper flow channel body 22 and the lower flow channel body 23 are both microchannels.

[0045] More specifically, in this embodiment:

[0046] The present invention provides a high-pressure microchannel liquid-coated hydrogen system, comprising a control drive device and a microchannel liquid-coated hydrogen device 17 .

[0047] The control drive device includes: air compressor 1, gas pressure gauge 2, filter pressure reducing valve 3, air inlet switch 4, gas-liquid booster 5, liquid source 6, filter 7, inlet check valve 8, gas-liquid three-way 9, hydrogen storage container 10, pressure reducing valve 11, gas check valve 12, outlet check valve 13, pressure maintaining tank 14, control valve 15, mechanical reversing valve 16, product storage tank 18. Among them, Figure 1 、 2 As shown: the air compressor 1 is connected to the gas-liquid booster 5 through a pipeline provided with a gas pressure gauge 2, a filter pressure reducing valve 3, and an air inlet switch 4 in sequence, which is used to implement pressure supply and pressure control of the gas-liquid booster 5; the liquid source 6 is connected to the gas-liquid tee 9 through a pipeline provided with a filter 7 and an inlet check valve 8 in sequence and further connected to the inlet of the gas-liquid booster 5, and the hydrogen storage container 10 is connected to the gas-liquid tee 9 through a pipeline provided with a pressure reducing valve 11 and a gas check valve 12 in sequence and further connected to the inlet of the gas-liquid booster 5; the outlet of the gas-liquid booster 5 is connected to the pressure maintaining tank 14 through a pipeline provided with an outlet check valve 13, and the pressure maintaining tank 14 is further connected to the inlet of the microchannel liquid-coated hydrogen device 17 through a pipeline provided with a control valve 15, and the outlet of the microchannel liquid-coated hydrogen device 17 is connected to the product storage tank 18; the control valve 15 adopts an air-controlled needle valve, which is connected to the air compressor 1 through a pipeline provided with a mechanical reversing valve 16.

[0048] An inlet check valve 8, a gas check valve 12 and an outlet check valve 13 are respectively provided at the inlet and outlet of the gas-liquid booster 5 to ensure the unidirectional fluidity and stability of the system; a pressure-maintaining tank 14 is provided after the gas-liquid booster 5 to store the pressurized gas-liquid mixture required by the system, thereby providing a stable pressure source to the microchannel liquid-coated hydrogen device 17.

[0049] Furthermore, the outlet of the gas-liquid booster 5 may be provided with a high-pressure pressure gauge to monitor the pressure changes during the fluid pressurization process, thereby detecting the sealing effect of the system. The compressed air inlet of the gas-liquid booster 5 (connected to the air compressor 1) is provided with a gas pressure gauge 2 and an air intake switch 4 to control the fluid boosting pressure, thereby ensuring the accuracy and reliability of the pressurization. The fluid boosting ratio of the gas-liquid booster 5 can be approximated to the area ratio of the large and small pistons inside the gas-liquid booster 5 (the boosting process is achieved through the principle of pressure balance in the axial direction of the piston, the output pressure is proportional to the driving pressure, and the boosting ratio is equal to the ratio of the force-bearing areas of the large and small pistons). Therefore, pistons of different sizes can also be replaced as needed to obtain the target fluid pressure.

[0050] Furthermore, the liquid source 6 is connected to the filter 7, and the liquid is filtered by the filter 7 to effectively remove impurities in the fluid, thereby protecting the internal components of the system from pollution and wear.

[0051] Furthermore, the gas-liquid supercharger 5 in the present embodiment adopts conventional compressed air of 0.8MPa as input, and provides high-pressure hydraulic pressure according to the boost ratio of 510:1 set by the gas-liquid supercharger 5 (similar to the area ratio of the large and small pistons in the gas-liquid supercharger 5), and the output pressure is proportional to the driving pressure. The air compressor 1 provides 0.8MPa of compressed air to the gas-liquid supercharger 5, which accurately controls the gas pressure through the filter pressure reducing valve 3 and then multiplies it by 510 times in the gas-liquid supercharger 5, that is, the system increases 51MPa for every 0.1MPa increase in pressure. According to the actual operating state and target needs, the optimal pressure of the liquid-coated hydrogen can be accurately adjusted by adjusting the filter pressure reducing valve 3 to ensure the stable storage of hydrogen in the liquid.

[0052] The high-pressure power source for the high-pressure microchannel liquid-encapsulated hydrogen system is formed by a combination of an air compressor 1 (providing pressure) and a gas-liquid booster 5 (multiplying pressure). A gas pressure gauge 2 monitors the driving pressure and, in turn, the pressure in the high-pressure microchannel liquid-encapsulated hydrogen system, ensuring the system operates within a safe pressure range and adjusting system parameters based on the pressure readings. A pressure reducing valve 11 and a gas check valve 12 precisely control the appropriate air pressure to enter the gas-liquid booster 5, where it is then boosted and fed into a pressure-maintaining tank 14.

[0053] Furthermore, after the fluid is pressurized by the gas-liquid booster 5 and then delivered to the pressure-maintaining tank 14 for pressure maintenance, the pressure is maintained. The pressure-maintaining tank 14 is designed to be a container capable of withstanding high pressures. After the fluid is delivered to the pressure-maintaining tank 14, the pressure within the tank gradually rises until it reaches equilibrium with the output pressure of the gas-liquid booster 5. Under high-pressure conditions, the pressure-maintaining tank 14 absorbs the pressure and fluid fluctuations generated by the flow of the high-pressure fluid, ensuring more stable pressure downstream of the system and precise pressure control.

[0054] Furthermore, it also includes: a product pressure gauge and a pressure-maintaining tank pressure gauge. The product pressure gauge monitors the pressure of the product storage tank 18, and the pressure-maintaining tank pressure gauge monitors the pressure of the pressure-maintaining tank 14 to ensure stable operation of the system and detect the sealing effect of the platform.

[0055] Furthermore, the filter pressure reducing valve 3 and the pressure reducing valve 11 are used to control and adjust the pressure input in the system to ensure that the system operates within an appropriate pressure range.

[0056] Furthermore, the liquid source 6 may be a low-pressure or normal-pressure liquid source, and the specific choice of liquid is determined according to the hydrogen storage needs; the hydrogen storage container 10 may be a hydrogen pressure tank or other gas storage equipment.

[0057] The microchannel liquid-coated hydrogen device 17 includes: an upper flow channel body 22, a lower flow channel body 23, a diverter cavity 19, a guide tube 20, and a jet tube 21; one end of the upper flow channel body 22 is connected to the control valve 15 of the control drive device, and the other end is connected to one end of the lower flow channel body 23, and the other end of the lower flow channel body 23 is connected to the product storage tank 18; the diverter cavity 19, the guide tube 20, and the jet tube 21 are arranged on the lower flow channel body 23, and the sizes of the diverter cavity 19, the guide tube 20, and the jet tube 21 are gradually reduced to form a channel structure in which the fluid is gradually accelerated and pressurized. Under the combined effect of the increase in the two-phase flow velocity and the fluid pressure, the liquid is more likely to form a coating on the hydrogen. Specifically, Figure 3 As shown, the flow channels of the microchannel liquid-coated hydrogen device 17 are all microchannels, which form an internal parallel flow structure with one inlet and one outlet: the upper flow channel body 22 and the diverter cavity 19 form a T-shaped structure, a pair of guide tubes 20 are provided and their first ends are respectively connected to the lateral ends of the diverter cavity 19, and a pair of jet tubes 21 are provided, which are respectively arranged from the second ends of the guide tubes 20 on both sides toward the center and connected to the outlet of the lower flow channel body 23, so that the outlet part of the jet tube 21 and the lower flow channel body 23 also form a T-shaped structure, so that a collision zone where the accelerated fluids on both sides converge will be formed at the connection position of the jet tube 21 and the lower flow channel body 23, and hydrogen is mainly coated with nanobubbles in this area.

[0058] Furthermore, the upper flow channel body 22 and the lower flow channel body 23 are both made of 316L stainless steel through machining, and the upper flow channel body 22 and the lower flow channel body 23 are processed with multiple through holes of the guide tube 20 and the jet tube 21 around the inlet and outlet, and are further threaded to adapt to high-strength bolt fastening kits and metal sealing gaskets, so that the upper flow channel body 22 and the lower flow channel body 23 can achieve high-pressure static sealing.

[0059] The microchannel liquid-coated hydrogen device 17 can operate stably under system pressure conditions of 100MPa to 400MPa; the pressure-maintaining tank 14 stores the supersaturated gas-liquid mixture required by the system and can absorb fluid fluctuations caused by high pressure, ensuring that the pressure downstream of the system is more stable, thereby providing a stable pressure source to the microchannel liquid-coated hydrogen device 17.

[0060] The control drive device controls the gas-liquid booster 5 to simultaneously pressurize the mixed fluid of the liquid provided by the liquid source 6 and the hydrogen gas provided by the hydrogen storage container 10, and transports the pressurized gas-liquid mixed fluid to the pressure maintaining tank 14 for pressure maintenance. Subsequently, the mechanical reversing valve 16 and the control valve 15 are used to control the gas-liquid two-phase flow to enter the microchannel liquid-coated hydrogen device 17 and perform two-phase flow collision and hydrogen coating. The coated product leaves the microchannel liquid-coated hydrogen device 17 and is collected in the product storage tank 18.

[0061] The specific workflow is as follows:

[0062] During the operation of the system, the fluid of the liquid source 6 enters the gas-liquid booster 5 through the inlet one-way valve 8, and at the same time, the hydrogen in the hydrogen storage container 10 enters the gas-liquid booster 5 through the pressure reducing valve 11 and the gas one-way valve 12; compressed air is provided by the air compressor 1, and after the gas pressure is controlled by the filtering pressure reducing valve 3, the compressed air drives the piston of the gas-liquid booster 5 to pressurize the mixed fluid entering the gas-liquid booster 5, and the pressurized fluid enters the pressure maintaining tank 14 through the outlet one-way valve 13 for pressure maintenance; when the mechanical reversing valve 16 opens the control valve 15, the high-pressure gas-liquid two-phase flow enters the microchannel liquid-coated hydrogen device 17 and collides to form nano hydrogen bubbles, realizing liquid-coated hydrogen, and finally the fluid rich in hydrogen is collected in the product storage tank 18.

[0063] The control / usage methods of this system are as follows:

[0064] The liquid from the liquid source 6 and the hydrogen from the hydrogen storage container 10 are mixed and enter the gas-liquid booster 5. The gas-liquid booster 5 pressurizes the mixed fluid under the action of the gas pressure supply component. The pressurized fluid enters the pressure maintaining tank 14 for pressure maintenance.

[0065] When the control valve 15 is opened, the high-pressure gas-liquid two-phase flow enters the microchannel liquid-coated hydrogen device 17. The gas-liquid two-phase flow is gradually accelerated and pressurized by the diversion chamber 19, the guide tube 20 and the jet tube 21 in the microchannel liquid-coated hydrogen device 17, and then the liquid-coated hydrogen is realized through mutual collision. The fluid rich in hydrogen is then collected in the product storage tank 18.

[0066] See Figure 4 The following figure shows the treatment effect of a high-pressure microchannel liquid-encapsulated hydrogen system for encapsulating hydrogen in this embodiment. After treatment with the microchannel liquid-encapsulated hydrogen device 17 at 250 MPa (the outlet pressure of the gas-liquid booster 5), a sample was removed with a rubber-tipped dropper and the size of the nano-hydrogen bubbles was observed using an optical microscope. It is clearly observed that the size and distribution of the nano-hydrogen bubbles are very uniform, and their stability is excellent, demonstrating the significant encapsulation effect of the liquid on the hydrogen.

[0067] See Figure 5, is a graph showing the change in the Zata potential of a solution of a product of this embodiment after being placed for different periods of time. Zeta potential is an important parameter for measuring the stability of a liquid dispersion system, and the magnitude of the Zeta potential in the solution directly affects the stability of hydrogen storage. The experiment measured the Zeta potential of the product solution at different times at 25°C and 200MPa (the outlet pressure of the gas-liquid supercharger 5, i.e., the pressure entering the microchannel liquid-coated hydrogen device 17). The larger the absolute value of the Zeta potential, the higher the density of the surface charge of the nanobubbles, the greater the electrostatic repulsion between the bubbles, and the more stable the nanobubbles. The Zeta potential value of the hydrogen bubbles obtained in this experiment is compared with public data, such as the Zeta potential of nanohydrogen bubbles in gasoline, which is about -10mV lower, indicating that the hydrogen bubbles produced by this solution are more stable. As the storage time increases, the absolute value of the bubble Zeta potential decreases, and the stability of the nanohydrogen bubbles decreases.

[0068] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0069] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A high-pressure microchannel liquid-coated hydrogen storage system, characterized in that: It includes a gas pressure supply component, a gas-liquid booster (5), a liquid source (6), a hydrogen storage container (10), a pressure-maintaining tank (14), a microchannel liquid-coated hydrogen device (17) and a product storage tank (18); The air pressure supply assembly is connected to the gas-liquid booster (5), and the air pressure supply assembly is used for supplying and controlling the pressure of the gas-liquid booster (5); the inlet of the gas-liquid booster (5) is connected to the liquid source (6) and the hydrogen storage container (10), respectively, and the outlet of the gas-liquid booster (5) is connected to the pressure-maintaining tank (14); the pressure-maintaining tank (14) is connected to the inlet of the microchannel liquid-coated hydrogen device (17), and a control valve (15) is provided on the pipeline between the pressure-maintaining tank (14) and the microchannel liquid-coated hydrogen device (17); the outlet of the microchannel liquid-coated hydrogen device (17) is connected to the product storage tank (18); The microchannel liquid-coated hydrogen device (17) includes an upper flow channel body (22) and a lower flow channel body (23); the first end of the upper flow channel body (22) is connected to the pressure-maintaining tank (14), the second end of the upper flow channel body (22) is connected to the first end of the lower flow channel body (23), and the second end of the lower flow channel body (23) is connected to the product storage tank (18); the lower flow channel body (23) is composed of a diverter cavity (19), a guide tube (20) and an ejector tube (21) connected in sequence, wherein the diameters of the diverter cavity (19), the guide tube (20) and the ejector tube (21) decrease in sequence; the upper flow channel body (22) and the lower flow channel body (23) are both microchannels.

2. A high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: The air pressure supply assembly comprises an air compressor (1); The air compressor (1) is connected to the gas-liquid booster (5), and an air intake switch (4) is provided on the pipeline between the air compressor (1) and the gas-liquid booster (5); the air compressor (1) is used to provide compressed air to the gas-liquid booster (5).

3. A high-pressure microchannel liquid-coated hydrogen storage system according to claim 2, characterized in that: The air pressure supply assembly further comprises a gas pressure gauge (2) and a filter pressure reducing valve (3); The gas pressure gauge (2) and the filter pressure reducing valve (3) are sequentially arranged on the pipeline between the air compressor (1) and the gas-liquid booster (5).

4. A high-pressure microchannel liquid-coated hydrogen storage system according to claim 2, characterized in that: The control valve (15) is a pneumatically controlled needle valve; The air compressor (1) is connected to a control valve (15), and a mechanical reversing valve (16) is provided on a pipeline between the air compressor (1) and the control valve (15).

5. The high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: A filter (7) and an inlet one-way valve (8) are sequentially arranged on the pipeline between the liquid source (6) and the gas-liquid booster (5).

6. The high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: A pressure reducing valve (11) and a gas one-way valve (12) are sequentially arranged on the pipeline between the hydrogen storage containers (10); The hydrogen storage container (10) is a hydrogen pressure tank.

7. The high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: The inlet of the gas-liquid booster (5) is connected to the liquid source (6) and the hydrogen storage container (10) respectively through a gas-liquid tee (9).

8. The high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: An outlet one-way valve (13) is provided on the pipeline between the outlet of the gas-liquid booster (5) and the pressure-maintaining tank (14).

9. The high-pressure microchannel liquid-coated hydrogen storage system according to claim 1, characterized in that: The outlet of the gas-liquid booster (5) is provided with a high-pressure pressure gauge; the pressure-maintaining tank (14) is provided with a pressure-maintaining tank pressure gauge; and the product storage tank (18) is provided with a product pressure gauge.

10. A control method for a high-pressure microchannel liquid-coated hydrogen storage system according to any one of claims 1 to 9, characterized in that: Liquid from the liquid source (6) and hydrogen from the hydrogen storage container (10) are mixed and enter the gas-liquid booster (5). The gas-liquid booster (5) pressurizes the mixed fluid under the action of the gas pressure supply component, and the pressurized fluid enters the pressure maintaining tank (14) for pressure maintenance; When the control valve (15) is opened, the high-pressure gas-liquid two-phase flow enters the microchannel liquid-coated hydrogen device (17). The gas-liquid two-phase flow is gradually accelerated and pressurized by the diversion cavity (19), the guide tube (20) and the ejection tube (21) in the microchannel liquid-coated hydrogen device (17). After the gas-liquid two-phase flow is mutually collided, the liquid-coated hydrogen is realized. The fluid rich in hydrogen is then collected in the product storage tank (18).

Images