Movable hydrogen production and hydrogenation integrated system

Abstract

The utility model relates to the technical field of hydrogen production and hydrogenation, in particular to a movable hydrogen production and hydrogenation integrated system which comprises a raw material storage device, a reforming device, a condensing device, a hydrogen purification device, a compression device, a hydrogen storage device, a hydrogenation device and an electric control device. The hydrogen production and hydrogenation integrated system disclosed by the utility model can realize the purposes of high-efficiency hydrogen production and hydrogenation.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production and hydrogen refueling technology, and in particular to a mobile integrated hydrogen production and hydrogen refueling system. Background Technology

[0002] Hydrogen energy, as a crucial component of clean energy, is playing an increasingly important role in the global energy transition. With the development of hydrogen energy technology, significant breakthroughs have been achieved in hydrogen fuel cell technology, and a large number of hydrogen fuel cell vehicles have begun to be used in the market. Hydrogen energy and fuel cell technology have become a research hotspot in the global energy and transportation sectors. However, safety hazards during hydrogen storage and high storage and transportation costs remain major bottlenecks restricting the development of hydrogen energy and hydrogen fuel cells.

[0003] Methanol generally exists in liquid form, has a high hydrogen storage density, and offers significant advantages in storage and transportation costs and safety. Compared to methanol partial oxidation and methanol autothermal reforming technologies, methanol reforming for hydrogen production is relatively mature and has a wider range of applications. However, the high reaction temperatures and vaporization units in current methanol reforming technologies result in slow start-up times for methanol-to-hydrogen systems. Against this backdrop, low-temperature methanol reforming for hydrogen production has become a current research hotspot.

[0004] Compared to existing energy vehicles, hydrogen fuel cell vehicles have certain advantages in terms of safety, refueling efficiency, driving range, low-temperature start-up, energy conversion efficiency, recycling, and emissions. The widespread use of hydrogen fuel cell vehicles relies heavily on hydrogen refueling infrastructure, but existing refueling stations are costly to build, and there are few stations compatible with hydrogen fuel cell vehicles, especially in remote areas. This severely limits the use and promotion of hydrogen energy and hydrogen fuel cell vehicles. Furthermore, in scenarios without sufficient refueling stations, hydrogen fuel cell vehicles will not function properly after running out of hydrogen, causing significant inconvenience to users. In existing hydrogen production and refueling vehicles, the hydrogen production process requires heating the reaction liquid to the reaction temperature before hydrogen production can begin, resulting in low efficiency. Summary of the Invention

[0005] This invention provides a mobile integrated hydrogen production and refueling system that can achieve efficient hydrogen production and refueling.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A mobile integrated hydrogen production and refueling system, comprising:

[0008] Raw material storage device, used to store reaction raw materials;

[0009] A reforming unit is used to reform feedstock to produce hydrogen. The feed inlet of the reforming unit is connected to the outlet of the feedstock storage unit through a first pipe. The first pipe includes a preheating zone, which is equipped with heating devices for heating.

[0010] A condensing device is used to cool the substance after the reaction in the reforming unit. The inlet of the condensing device is connected to the outlet of the reforming unit through a pipe. The condensing device includes a gas outlet and a liquid outlet.

[0011] A hydrogen purification device is used to purify hydrogen. The inlet of the hydrogen purification device is connected to the gas outlet of the condenser through a pipeline. The hydrogen purification device includes a hydrogen outlet and a waste gas outlet.

[0012] A compression device is used to compress the hydrogen purified by the hydrogen purification device. The inlet of the compression device is connected to the outlet of the hydrogen purification device through a pipeline.

[0013] A hydrogen storage device for storing hydrogen gas, wherein the inlet of the hydrogen storage device is connected to the outlet of the compression device via a pipeline;

[0014] A hydrogenation device is used to add hydrogen to hydrogen-using equipment, wherein the inlet of the hydrogenation device is connected to the outlet of the hydrogen storage device;

[0015] The electric control device is electrically connected to both the hydrogenation device and the compression device.

[0016] Furthermore, it also includes a tail gas treatment device, which is used to treat the tail gas purified by the hydrogen purification device. The inlet of the tail gas treatment device is connected to the outlet of the hydrogen purification device through a pipeline.

[0017] Furthermore, it also includes a liquid recovery device for recovering the reaction liquid condensed by the condensing device, wherein the inlet of the liquid recovery device is connected to the liquid outlet of the condensing device via a pipe.

[0018] Furthermore, the outlet of the liquid recovery device is connected to the inlet of the raw material storage device via a pipe.

[0019] Furthermore, the outer wall of the preheating zone of the first pipeline is covered with an insulation layer.

[0020] Furthermore, the reforming unit is filled with a catalyst.

[0021] Furthermore, the hydrogen purification device includes a dryer and a hydrogen purifier. The hydrogen outlet and the waste gas outlet are located on the hydrogen purifier. The inlet of the dryer is connected to the outlet of the condenser via a pipe. The outlet of the dryer is connected to the inlet of the hydrogen purifier via a pipe. The hydrogen outlet of the hydrogen purifier is connected to the inlet of the compression device via a pipe. The waste gas outlet of the hydrogen purifier is connected to the inlet of the tail gas treatment device via a pipe.

[0022] Furthermore, the hydrogen purifier is a pressure swing adsorption (PSA) device.

[0023] Furthermore, a hydrogen sensor and a buzzer alarm are installed between the hydrogen refueling device and the hydrogen storage device. The hydrogen sensor and the buzzer alarm are electrically connected to the electronic control device. When the hydrogen sensor detects a hydrogen leak, it transmits a signal to the electronic control device, which then controls the buzzer alarm to sound an alarm upon receiving the signal.

[0024] The beneficial effects of this utility model are:

[0025] This invention integrates functional modules such as raw material storage, reforming for hydrogen production, hydrogen purification, compression, hydrogen storage, and hydrogen refueling within the system. It can provide hydrogen refueling services for hydrogen fuel cell vehicles in areas without traditional hydrogen refueling stations, enabling on-site hydrogen production and refueling, reducing dependence on fixed hydrogen refueling stations, and improving the flexibility and applicability of hydrogen energy use.

[0026] The system of this utility model has a reasonable overall structure and compact layout. It can be placed on a truck or other transport vehicle to achieve mobility, making it suitable for vehicle-mounted or mobile application scenarios. It is especially suitable for rapid deployment in remote areas, temporary sites or emergency situations.

[0027] This invention sets up a preheating zone and equips it with heating devices in the raw material conveying pipeline, which helps to increase the temperature of the reaction raw materials before they enter the reforming unit, thereby improving the reforming reaction efficiency, reducing additional energy input, and optimizing overall energy efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0030] Figure 2This is a cross-sectional view of the reforming device according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 10. Raw material storage device; 11. Second inlet pump; 12. Methanol inlet; 13. Water inlet; 14. Recovered liquid inlet; 15. Raw material outlet; 20. Reforming unit; 21. First pipeline; 22. Preheating zone; 23. Heating element; 24. Insulation layer; 25. Catalyst; 26. Reaction liquid inlet; 27. Gas outlet; 28. Baffle plate; 29. ​​Heating component; 30. Condensation device; 31. Gas outlet; 32. Liquid outlet; 33. Gas inlet; 41. Hydrogen outlet; 42. Waste gas outlet; 43. Dryer; 44. Hydrogen purifier; 45. Drying gas inlet; 46. Drying gas outlet; 50. Compression device; 60. Hydrogen storage device; 70. Hydrogenation device; 80. Electrical control device; 90. Tail gas treatment device; 100. Liquid recovery device; 110. First inlet pump. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0033] Example

[0034] like Figure 1 As shown, this utility model provides a mobile integrated hydrogen production and refueling system, which includes a raw material storage device 10, a reforming device 20, a condensing device 30, a hydrogen purification device, a compression device 50, a hydrogen storage device 60, a hydrogen refueling device 70, an electrical control device 80, a tail gas treatment device 90, and a liquid recovery device 100. The raw material storage device 10, reforming device 20, condensing device 30, hydrogen purification device, compression device 50, hydrogen storage device 60, and hydrogen refueling device 70 are connected sequentially via pipelines. The inlet of the tail gas treatment device 90 is connected to the outlet of the hydrogen purification device via a pipeline, and the inlet of the liquid recovery device 100 is connected to the outlet of the condensing device 30 via a pipeline.

[0035] Specifically, the raw material storage device 10 is used to store the reaction raw materials. The reforming unit 20 is used to reform the raw materials to produce hydrogen. The inlet of the reforming unit 20 is connected to the outlet of the raw material storage device 10 through a first pipe 21. The first pipe 21 includes a preheating zone 22, which is equipped with a heating device 23 for heating the preheating zone 22. The condensing unit 30 is used to cool the substances after the reaction in the reforming unit 20. The inlet of the condensing unit 30 is connected to the outlet of the reforming unit 20 through a pipe. The condensing unit 30 includes a gas outlet 31 and a liquid outlet 32. The hydrogen purification unit is used to purify hydrogen. The inlet of the hydrogen purification unit is connected to the gas outlet 31 of the condensing unit 30 through a pipe. The hydrogen purification unit includes a hydrogen outlet 41 and a waste gas outlet 42. Compression device 50 is used to compress the hydrogen purified by the hydrogen purification device. The inlet of compression device 50 is connected to the hydrogen outlet 41 of the hydrogen purification device via a pipeline. Compression device 50 is a compressor. Hydrogen storage device 60 is used to store hydrogen. The inlet of hydrogen storage device 60 is connected to the outlet of compression device 50 via a pipeline. Hydrogen storage device 60 is a high-pressure hydrogen storage tank. Hydrogen refueling device 70 is used to refuel hydrogen-using equipment. The inlet of hydrogen refueling device 70 is connected to the outlet of hydrogen storage device 60. Hydrogen refueling device 70 is existing technology. Electrical control device 80 is electrically connected to hydrogen refueling device 70 and compression device 50. Electrical control device 80 is used to control hydrogen refueling device 70 to refuel hydrogen-using equipment and to control compression device 50 to compress hydrogen.

[0036] This utility model provides a mobile integrated hydrogen production and refueling system, which solves the problems of high construction cost, sparse distribution, and difficulty in covering remote areas of existing hydrogen refueling stations by integrating hydrogen production and refueling functions into the same system.

[0037] This invention integrates functional modules such as raw material storage, reforming for hydrogen production, hydrogen purification, compression, hydrogen storage, and hydrogen refueling within the system. It can provide hydrogen refueling services for hydrogen fuel cell vehicles in areas without traditional hydrogen refueling stations, enabling on-site hydrogen production and refueling, reducing dependence on fixed hydrogen refueling stations, and improving the flexibility and applicability of hydrogen energy use.

[0038] The various functional modules of this utility model are connected by pipes and uniformly controlled by an electronic control device 80. The overall structure is reasonably designed and compactly laid out. It can be placed on a truck or other transport vehicle to achieve mobility, making it suitable for vehicle-mounted or mobile application scenarios. It is especially suitable for rapid deployment in remote areas, temporary sites, or emergency situations.

[0039] This invention sets up a preheating zone 22 and equips it with a heating device 23 in the raw material conveying pipeline, which helps to increase the temperature of the reaction raw materials before they enter the reforming unit 20, thereby improving the reforming reaction efficiency, reducing additional energy input, and optimizing overall energy efficiency.

[0040] This utility model is equipped with a condensation device 30 and a hydrogen purification device, which can effectively remove impurity gases and moisture generated after the reforming reaction, ensuring that the purity of the output hydrogen meets the standards for use in hydrogen fuel cell vehicles, thereby improving the safety and stability of the hydrogen refueling process.

[0041] The compression device 50 of this invention can compress purified hydrogen to a suitable pressure, while the hydrogen storage device 60 can achieve stable storage of hydrogen, providing a continuous and stable hydrogen supply capacity for the subsequent hydrogen refueling device 70, and meeting the hydrogen refueling speed and capacity requirements of hydrogen fuel cell vehicles.

[0042] The electrical control device 80 of this utility model is electrically connected to key components such as the hydrogenation device 70 and the compression device 50, which can realize the automated operation and centralized control of the system, improve the convenience of operation and the reliability of operation, and reduce the degree of manual intervention.

[0043] In summary, the integrated hydrogen production and refueling system proposed in this utility model has achieved significant technological progress in improving the convenience of hydrogen energy use, reducing the investment cost of hydrogen refueling infrastructure, and enhancing the system's adaptability and intelligence level, and has good application prospects and socio-economic benefits.

[0044] It also includes an exhaust gas treatment device 90, which is used to treat the exhaust gas purified by the hydrogen purification device. The inlet of the exhaust gas treatment device 90 is connected to the outlet of the hydrogen purification device through a pipeline.

[0045] The hydrogen purification process generates a certain amount of waste gas, which may contain unreacted raw material gas and impurity gases (such as carbon monoxide, carbon dioxide, methane, etc.). Direct emission of these gases will pollute the environment. By installing a tail gas treatment device 90, these harmful components can be effectively removed or converted, achieving emission standards.

[0046] The exhaust gas may still contain some hydrogen or other recyclable components. The exhaust gas treatment device 90 can recover the effective components through adsorption, condensation, catalytic combustion, or recycling, thereby reducing resource waste and improving the overall hydrogen utilization efficiency of the system.

[0047] If the exhaust gas contains flammable, explosive, or toxic gases, direct emission may pose safety hazards. The exhaust gas treatment device 90 can render these hazardous components harmless, reducing safety risks during system operation and improving the safety and stability of the entire integrated hydrogen production and refueling system.

[0048] The introduction of the exhaust gas treatment device 90 enables the entire hydrogen production and refueling system to form a closed-loop process from raw material input to hydrogen production and then to exhaust gas treatment. This makes the system more complete and more integrated, which helps to achieve automated control and intelligent management of the system.

[0049] It also includes a liquid recovery device 100, which is used to recover the reaction liquid after condensation by the condensing device 30. The inlet of the liquid recovery device 100 is connected to the liquid outlet 32 ​​of the condensing device 30 through a pipe.

[0050] During the reforming process for hydrogen production, the reactants react to produce gases such as hydrogen and carbon dioxide. Some of the unreacted reactants are heated and vaporized in the reforming unit 20. These mixed gases are carried by the carrier gas into the condensing unit 30. After being cooled by the condensing unit 30, the unreacted reactants are cooled to form liquid and enter the liquid recovery unit 100 for recycling, thus avoiding resource waste and improving the overall energy utilization efficiency of the system.

[0051] If the condensed reaction liquid is discharged directly without treatment, it may contain trace amounts of organic matter or other pollutants, posing an environmental risk. The liquid recovery device 100 can collect, separate, or pre-treat the condensate, helping to control pollutant emissions.

[0052] By centrally recycling and processing the reaction liquid, problems such as blockage and corrosion caused by the accumulation of liquid inside the system can be avoided, which helps to extend the service life of the equipment and improve the stability and safety of the system operation.

[0053] The introduction of the liquid recovery device 100 expands the entire hydrogen production and refueling system from gas processing to the recovery and management of liquid by-products, realizing full-process processing that emphasizes both gas and liquid, improving the integrity and integration of the system, and facilitating automated control and intelligent management.

[0054] The outlet of the liquid recovery device 100 is connected to the inlet of the raw material storage device 10 via a pipe.

[0055] This invention re-transports the condensate in the liquid recovery device 100 back to the raw material storage device 10, allowing it to be reused as part of the reaction raw material or diluent. This reduces the consumption of fresh raw materials and wastewater discharge, improves the system's energy efficiency and environmental friendliness, and also helps to reduce operating costs and enhance the system's sustainable operation.

[0056] The liquid recovery device 100 and the raw material storage device 10 are connected by a first infusion pump 110, which is used to transport the liquid in the liquid recovery device 100 to the raw material storage device 10.

[0057] In this embodiment, the raw material storage device 10 is a raw material storage tank, which is equipped with a methanol inlet 12, a water inlet 13, a recovery liquid inlet 14, and a raw material outlet 15. The methanol inlet 12 and water inlet 13 are located at the top of the raw material storage tank, while the recovery liquid inlet 14 and raw material outlet 15 are located at the bottom. Each of these inlets is equipped with a valve. The recovery liquid inlet 14 is connected to a liquid recovery device 100 via a pipe, and the raw material outlet 15 is connected to a reforming unit 20 via a pipe. During use, methanol and water are added to the raw material storage device 10 in a certain proportion through the methanol inlet 12 and water inlet 13 to prepare a methanol-water solution suitable for the reaction, facilitating subsequent hydrogen production in the reforming unit 20. Positioning the raw material outlet 15 at the bottom of the raw material storage tank facilitates the transport of the reaction liquid from the bottom of the tank to the reforming unit 20.

[0058] In this embodiment, the preheating zone 22 of the first pipe 21 is a portion of the first pipe 21, preferably a portion of the first pipe 21 close to the reforming unit 20. This shortens the distance between the preheating zone 22 and the reforming unit 20, which helps reduce energy loss. In other embodiments, the preheating zone 22 can be the entire first pipe 21, increasing the length of the preheating channel in the preheating zone 22 to ensure sufficient preheating of the reaction liquid. This allows the reaction liquid to quickly reach the reaction temperature after entering the reforming unit 20, improving reaction efficiency.

[0059] Furthermore, such as Figure 2 As shown, the preheating zone 22 of the first pipe 21 can be a straight pipe. In other embodiments, the preheating zone 22 of the first pipe 21 can be a corrugated pipe, which makes the preheating channel of the preheating zone 22 longer. This is beneficial to extend the residence time of the reaction liquid in the preheating zone 22, fully preheat the reaction liquid, and enable the reaction liquid to quickly reach the reaction temperature after entering the reforming device 20, thereby improving the reaction efficiency.

[0060] The heating device 23 can be a resistance wire heater, a PCT ceramic heater, an electromagnetic induction heater, or a steam heating jacket. This invention does not limit the type of heating device 23; any heating device 23 capable of heating the preheating zone 22 is acceptable. The heating device 23 is disposed on the outer wall of the preheating zone 22 of the first pipe 21. The heating device 23 can be directly embedded or attached to the outer wall of the pipe, reducing its size and facilitating integration into a compact integrated system. In other embodiments, the heating device 23 can be disposed inside the preheating zone 22 of the first pipe 21.

[0061] The preheating zone 22 of the first pipe 21 is covered with an insulation layer 24. By providing an insulation layer 24 on the outer wall of the preheating zone 22, this invention can effectively reduce heat loss, improve energy utilization, help maintain the temperature stability of the raw materials before entering the reforming unit 20, ensure the efficient progress of the reforming reaction, and avoid energy waste caused by excessive temperature difference, thereby improving the thermal efficiency and operational stability of the entire system.

[0062] Specifically, when the heating device 23 is placed on the outer wall of the preheating zone 22 of the first pipe 21, the insulation layer 24 covers the heating device 23. The insulation layer 24 is a high-efficiency heat insulation material, such as high-temperature resistant insulation cotton, aluminosilicate cotton, aerogel, or ceramic fiber, which can prevent heat loss and improve thermal efficiency.

[0063] In order to facilitate the transfer of the reaction liquid in the raw material storage device 10 to the reforming device 20, a second liquid pump 11 is provided between the raw material storage device 10 and the reforming device 20. The inlet of the second liquid pump 11 is connected to the raw material storage device 10 through a pipe, and the outlet of the second liquid pump 11 is connected to the reforming device 20 through a first pipe 21.

[0064] Among them, such as Figure 2 As shown, the reforming unit 20 is filled with catalyst 25. The introduction of catalyst 25 can significantly accelerate the reforming reaction rate and reduce the reaction temperature, thereby increasing hydrogen yield and reducing energy consumption. This helps to achieve efficient and energy-saving operation of the hydrogen production process, while also extending the service life of the equipment and improving the overall reaction efficiency and economy of the system. Specifically, catalyst 25 is a copper-based catalyst 25. Cu-based catalyst 25 is inexpensive, simple to prepare, and can efficiently produce hydrogen from methanol at low temperatures. Furthermore, it produces no byproduct gases such as CO in the product gas, resulting in low energy consumption and higher hydrogen production efficiency.

[0065] The reforming unit 20 has a reaction liquid inlet 26 at the bottom and a gas outlet 27 at the top. A first pipe 21 is connected to the reaction liquid inlet 26 of the reforming unit 20, and a condenser 30 is connected to the gas outlet 27 of the reforming unit 20 via a pipe. By placing the reaction liquid inlet 26 at the bottom of the reforming unit 20, it is beneficial for the reaction liquid to fully contact the catalyst 25 inside the reforming unit 20, thereby improving the reaction efficiency.

[0066] Reforming units 20 can be classified into fluidized bed reactors, fixed bed reactors, membrane reactors, packed bed reactors, and microchannel reactors according to their structure. The specific type of reactor to be selected can be determined based on the actual situation.

[0067] In an embodiment, such as Figure 2As shown, the reforming unit 20 is equipped with multiple baffles 28. The outer edges of the baffles 28 are fixedly connected to the inner wall of the reforming unit 20. The baffles 28 are spaced apart along the direction from the reaction liquid inlet 26 to the gas outlet 27. Each baffle 28 has multiple holes, the diameter of which is smaller than the diameter of the catalyst 25. The catalyst 25 fills the spaces between the baffles 28. By using multiple baffles 28 and filling the spaces between them with the catalyst 25, and ensuring that the size of the holes on the baffles 28 is smaller than the size of the catalyst 25, it is possible to prevent catalyst 25 particles from entering the reaction liquid inlet 26 or the gas outlet 27 during the reaction process, thus avoiding catalyst 25 loss or blockage at the inlet and outlet of the reforming unit 20.

[0068] To ensure the reaction liquid inside the reforming unit 20 reaches the reaction temperature, a heating element 29 is provided on the outside of the reforming unit 20. The heating element 29 can be a resistance wire heater, a PCT ceramic heater, an electromagnetic induction heater, or a steam heating jacket. In this embodiment, a resistance wire heater is preferred. This invention does not limit the type of heating element 29; any heating device capable of heating the reforming unit 20 is acceptable. The heating element 29 is disposed on the outer wall of the reforming unit 20. It can be directly embedded in or attached to the outer wall of the reforming unit 20, reducing its size and facilitating integration into a compact integrated system. In other embodiments, the heating element 29 can also be disposed on the inner wall of the reforming unit 20.

[0069] The condenser 30 includes a gas inlet 33, a gas outlet 31, and a liquid outlet 32. The gas inlet 33 and liquid outlet 32 ​​are located at the bottom of the condenser 30, while the gas outlet 31 is located at the top. The gas inlet 33 of the condenser 30 is connected to the gas outlet 27 of the reforming unit 20 via a pipe. The gas outlet 31 of the condenser 30 is connected to the inlet of the hydrogen purification unit via a pipe. The liquid outlet 32 ​​of the condenser 30 is connected to the inlet of the liquid recovery unit 100 via a pipe. By placing the gas inlet 33 at the bottom and the gas outlet 31 at the top of the condenser 30, the gas's movement path is extended, increasing the residence time of the gas in the condenser 30. This allows the gas to be fully cooled, causing water vapor, methanol gas, and other gases contained in the gas to be cooled and formed into droplets, which then enter the liquid outlet 32 ​​for discharge. Meanwhile, hydrogen and other gases are discharged from the top gas outlet 31 into the hydrogen purification unit, improving the separation effect. The liquid outlet 32 ​​is located at the bottom to facilitate the discharge of the condensed liquid. The condensation device 30 can be a water-cooled condensation device 30, and its condensation structure is existing technology and will not be described in detail here.

[0070] The hydrogen purification device includes a dryer 43 and a hydrogen purifier 44. A hydrogen outlet 41 and a waste gas outlet 42 are located on the hydrogen purifier 44. The inlet of the dryer 43 is connected to the outlet of the condenser 30 via a pipe. The outlet of the dryer 43 is connected to the inlet of the hydrogen purifier 44 via a pipe. The hydrogen outlet 41 of the hydrogen purifier 44 is connected to the inlet of the compressor 50 via a pipe. The waste gas outlet 42 of the hydrogen purifier 44 is connected to the inlet of the tail gas treatment device 90 via a pipe.

[0071] This invention achieves modularization and functionalization of the hydrogen purification process through optimized structural design of the hydrogen purification device. The dryer 43 removes residual moisture from the hydrogen, preventing corrosion and performance degradation of subsequent equipment; the hydrogen purifier 44 further removes impurities, improving hydrogen purity. Simultaneously, the exhaust outlet is connected to the tail gas treatment device 90, enabling closed-loop management of the entire hydrogen purification process, ensuring hydrogen quality while reducing pollutant emissions.

[0072] Specifically, the dryer 43 is filled with a desiccant, which is one or more of anhydrous sodium sulfate and anhydrous calcium chloride. The dryer 43 includes a drying inlet 45 at the bottom and a drying outlet 46 at the top. The drying inlet 45 is connected to the gas outlet 31 of the condenser 30 through a pipe, and the drying outlet 46 is connected to the inlet of the hydrogen purifier 44 through a pipe. This allows the gas to be dried to flow into the dryer 43 from the bottom, fully contact and dry with the desiccant in the dryer 43, and then be discharged from the drying outlet 46 at the top. This facilitates the thorough drying of the gas and the adsorption of uncooled water vapor.

[0073] The hydrogen purifier 44 is a pressure swing adsorbent (PSA). A PSA consists of an adsorption tower and a desorption tower that operate alternately. The hydrogen purifier 44 contains an adsorbent, which is a molecular sieve. Its main function is to adsorb CO2 and gaseous methanol to achieve efficient hydrogen purification. PSA is a current technology.

[0074] This invention employs a pressure swing adsorption (PSA) unit as the core equipment for hydrogen purification, which can efficiently separate hydrogen from other impurity gases to obtain high-purity hydrogen that meets the standards for fuel cell vehicles. This technology is mature, easy to operate, and has low energy consumption, significantly improving hydrogen purification efficiency and the overall stability and reliability of the system.

[0075] A hydrogen sensor (not shown in the figure) and a buzzer alarm (not shown in the figure) are installed between the hydrogen refueling unit 70 and the hydrogen storage unit 60. The hydrogen sensor and the buzzer alarm are electrically connected to the electronic control unit 80. The hydrogen sensor is used to detect whether there is a hydrogen leak in the system. When the hydrogen sensor detects a hydrogen leak, it transmits the detected hydrogen concentration value signal to the electronic control unit 80 in real time. The electronic control unit 80 has a preset maximum hydrogen concentration value. Once the concentration value exceeds the preset maximum threshold, the electronic control unit 80 receives the signal and controls the buzzer alarm to sound an alarm, reminding the staff that there is a risk of gas leakage in the system.

[0076] This invention introduces a hydrogen leak monitoring and automatic alarm mechanism, which can detect and issue an alarm in the early stages of hydrogen leaks, reminding operators to take countermeasures, effectively preventing safety accidents, greatly improving the system's safety protection level and intelligence level, and ensuring the safety of equipment and personnel.

[0077] Specifically, the aforementioned pipe is a stainless steel pipe, and valves are installed at both the inlet and outlet of this utility model.

[0078] Working principle:

[0079] When the system is working, methanol and water are fed into the raw material storage tank in a certain proportion for use in hydrogen production. During hydrogen production, the pump delivers the reaction liquid from the raw material storage tank to the first pipeline 21. When the reaction liquid reaches the preheating zone 22 of the first pipeline 21, the heating device 23 outside the preheating zone 22 preheats the reaction liquid inside the pipeline, causing the temperature of the reaction liquid to rise. Simultaneously, the heating device 23 outside the reforming unit 20 heats the reforming unit 20. After the reforming unit 20 reaches the temperature and state required for the reforming reaction, the preheated reaction liquid enters the reforming unit 20 and carries out a methanol-water phase reforming reaction to produce hydrogen under the action of the catalyst 25. The reaction produces a mixed gas of H2O, CH3OH, H2, and CO2. The mixed gas is discharged from the gas outlet 27 of the reforming unit 20 under the action of the carrier gas (N2) and enters the condenser 30 for cooling. This cools the unreacted water vapor and raw materials such as methanol in the mixed gas into liquid and discharges it from the liquid outlet 32 ​​of the condenser 30 to the liquid recovery device 100 for recovery. Meanwhile, the hydrogen, carbon dioxide, and other gases in the mixed gas are discharged from the gas outlet 31 of the condenser 30 and enter the hydrogen purification device. The condenser 30 effectively separates the reaction product gas and the unreacted liquid raw materials such as water and methanol. The hydrogen, carbon dioxide, and other gases discharged from the gas outlet 31 of the condenser 30 first flow into the dryer 43, where the desiccant adsorbs the uncooled water vapor. The dried gas then flows into the hydrogen purifier 44, which contains an adsorbent to adsorb CO2 and gaseous methanol, achieving efficient hydrogen purification. The purified hydrogen then enters the compression unit 50 through the hydrogen outlet 41 of the hydrogen purifier 44 via a pipeline. In the compression unit 50, it is compressed to the required pressure (0.1-70 MPa). The compressed hydrogen then enters the hydrogen storage unit 60 for storage. The outlet of the hydrogen storage unit 60 is connected to the inlet of the hydrogen refueling unit 70. When hydrogen-using equipment (such as hydrogen fuel cell vehicles) needs hydrogen refueling, the hydrogen refueling unit 70 refuels the equipment, ultimately achieving on-site hydrogen production and use. The flexible mobile equipment can also meet the hydrogen production and use needs in multiple scenarios.

[0080] In summary, this utility model has the following advantages:

[0081] 1. This utility model adopts on-site hydrogen production technology based on methanol reforming, which has a lower cost compared with existing technologies such as natural gas hydrogen production and water electrolysis hydrogen production.

[0082] 2. This invention uses Cu-based catalyst 25, which is inexpensive, simple to prepare, and can efficiently produce hydrogen from methanol at low temperatures. Moreover, no by-product gases such as CO are generated in the product gas, resulting in low energy consumption and higher hydrogen production efficiency.

[0083] 3. The system of this utility model is small in size and can be placed on trucks and other transport vehicles, so as to realize the mobility and on-site hydrogen production and use. There are no hydrogen storage and transportation links. Hydrogen is produced and used on demand, which is energy-saving and safe and meets the needs of various hydrogen use scenarios.

[0084] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A mobile integrated hydrogen production and refueling system, characterized in that, include: Raw material storage device, used to store reaction raw materials; A reforming unit is used to reform feedstock to produce hydrogen. The feed inlet of the reforming unit is connected to the outlet of the feedstock storage unit through a first pipe. The first pipe includes a preheating zone, which is equipped with heating devices for heating. A condensing device is used to cool the substance after the reaction in the reforming unit. The inlet of the condensing device is connected to the outlet of the reforming unit through a pipe. The condensing device includes a gas outlet and a liquid outlet. A hydrogen purification device is used to purify hydrogen. The inlet of the hydrogen purification device is connected to the gas outlet of the condenser through a pipeline. The hydrogen purification device includes a hydrogen outlet and a waste gas outlet. A compression device is used to compress the hydrogen purified by the hydrogen purification device. The inlet of the compression device is connected to the outlet of the hydrogen purification device through a pipe. A hydrogen storage device for storing hydrogen gas, wherein the inlet of the hydrogen storage device is connected to the outlet of the compression device via a pipeline; A hydrogenation device is used to add hydrogen to hydrogen-using equipment, wherein the inlet of the hydrogenation device is connected to the outlet of the hydrogen storage device; The electric control device is electrically connected to both the hydrogenation device and the compression device.

2. The mobile integrated hydrogen production and refueling system according to claim 1, characterized in that, It also includes an exhaust gas treatment device, which is used to treat the exhaust gas purified by the hydrogen purification device. The inlet of the exhaust gas treatment device is connected to the outlet of the hydrogen purification device through a pipeline.

3. The mobile integrated hydrogen production and refueling system according to claim 1, characterized in that, It also includes a liquid recovery device, which is used to recover the reaction liquid condensed by the condenser. The inlet of the liquid recovery device is connected to the liquid outlet of the condenser through a pipe.

4. The mobile integrated hydrogen production and refueling system according to claim 3, characterized in that, The outlet of the liquid recovery device is connected to the inlet of the raw material storage device via a pipe.

5. The mobile integrated hydrogen production and refueling system according to claim 1, characterized in that, The outer wall of the preheating zone of the first pipeline is covered with an insulation layer.

6. The mobile integrated hydrogen production and refueling system according to claim 1, characterized in that, The reforming unit is filled with a catalyst.

7. A mobile integrated hydrogen production and refueling system according to claim 2, characterized in that, The hydrogen purification device includes a dryer and a hydrogen purifier. The hydrogen outlet and the waste gas outlet are located on the hydrogen purifier. The inlet of the dryer is connected to the outlet of the condenser via a pipe. The outlet of the dryer is connected to the inlet of the hydrogen purifier via a pipe. The hydrogen outlet of the hydrogen purifier is connected to the inlet of the compression device via a pipe. The waste gas outlet of the hydrogen purifier is connected to the inlet of the tail gas treatment device via a pipe.

8. A mobile integrated hydrogen production and refueling system according to claim 7, characterized in that, The hydrogen purifier is a pressure swing adsorption unit.

9. A mobile integrated hydrogen production and refueling system according to claim 1, characterized in that, A hydrogen sensor and a buzzer alarm are installed between the hydrogen refueling device and the hydrogen storage device. The hydrogen sensor and the buzzer alarm are electrically connected to the electronic control device. When the hydrogen sensor detects a hydrogen leak, it transmits a signal to the electronic control device, which then controls the buzzer alarm to sound an alarm upon receiving the signal.

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