Recovery system of liquid hydrogen storage tank and control method of recovery system
By designing a liquid hydrogen storage tank recovery system, hydrogen is processed using a heating and pressurizing device and converted into electrical energy or adsorbed and discharged. This solves the problems of loss and safety hazards caused by hydrogen emissions from liquid hydrogen storage tanks and achieves safe and efficient hydrogen recovery.
Patent Information
- Application Number
- CN202511857601.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-02-06
AI Technical Summary
Existing technologies for liquid hydrogen storage tanks result in significant losses and safety hazards due to hydrogen emissions. Direct release into the air may pose an explosion risk, making them relatively unsafe.
Design a liquid hydrogen storage tank recovery system, including a heating and pressurization device, a storage module, an energy conversion module, and an adsorption emission module. The system processes hydrogen by heating and pressurizing it, stores it, and converts it into electrical energy or adsorbs it for emission, thereby reducing direct emissions and lowering the risk of explosion.
This improves the safety of hydrogen recovery, reduces hydrogen loss and the possibility of explosion, and enhances the stability and safety of the system.
Smart Images
Figure CN121474492A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of hydrogen recovery technology, and in particular relates to a recovery system for a liquid hydrogen storage tank and its control method. Background Technology
[0002] Liquid hydrogen has a low latent heat of vaporization and is easily evaporated. Even a tiny amount of heat leakage can cause a large amount of evaporation and vaporization of liquid hydrogen, leading to an increase in pressure in the liquid hydrogen storage tank. When the pressure in the tank increases to the upper limit of the tank's capacity, the hydrogen needs to be released. In existing technologies, direct release is usually used. However, on the one hand, direct release of hydrogen will cause a large loss of hydrogen. On the other hand, because hydrogen has a wide explosive range, direct release into the air may pose an explosion hazard, resulting in low safety. Therefore, how to improve the safety of hydrogen recovery is an urgent technical problem to be solved. Summary of the Invention
[0003] The embodiments of this application provide a liquid hydrogen storage tank recovery system and its control method, which can improve the safety of hydrogen recovery.
[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0005] According to a first aspect of the embodiments of this application, a liquid hydrogen storage tank recovery system is provided, characterized in that the system includes a heating and pressurizing device, a storage module, an electrical energy conversion module, and an adsorption and emission module, wherein the heating and pressurizing device is connected to the liquid hydrogen storage tank and is used to heat and pressurize the low-temperature hydrogen gas overflowing from the liquid hydrogen storage tank to obtain hydrogen gas to be recovered; the storage module is connected to the heating and pressurizing device through a pipeline and is used to store the hydrogen gas to be recovered; the electrical energy conversion module is connected to the storage module through a pipeline and is used to convert the hydrogen gas to be recovered into electrical energy and store it; the adsorption and emission module is connected to the storage module through a pipeline and is used to adsorb and emit the hydrogen gas to be recovered.
[0006] In some embodiments of this application, based on the aforementioned scheme, the storage module includes: a first buffer tank, which is connected to the heating and pressurizing device via a pipeline for initially storing hydrogen to be recovered; a hydrogen compressor, which is connected to the first buffer tank via a pipeline for compressing the hydrogen to be recovered to a second preset pressure; and a second buffer tank, which is connected to the hydrogen compressor via a pipeline for storing the hydrogen to be recovered at the second preset pressure.
[0007] In some embodiments of this application, based on the aforementioned scheme, the power conversion module includes: a hydrogen power generation device connected to the second buffer tank via a pipeline for converting the hydrogen to be recovered into electrical energy; and a battery connected to the hydrogen power generation device via a wire for storing electrical energy and supplying power to the system.
[0008] In some embodiments of this application, based on the aforementioned scheme, the adsorption emission module includes: a first adsorber connected to the second buffer tank via a pipeline for initially adsorbing the hydrogen to be emitted and recovered; and a second adsorber connected to the first adsorber via a pipeline for secondary adsorption of the hydrogen to be emitted and recovered.
[0009] According to a second aspect of the embodiments of this application, a control method for a system as described in any of the first aspects above is provided, characterized in that the method includes: raising the temperature of cryogenic hydrogen gas evaporated from a liquid hydrogen storage tank to a preset temperature using a heating and pressurizing device, and raising the pressure of the cryogenic hydrogen gas to a first preset pressure to obtain hydrogen gas to be recovered, and storing the hydrogen gas to be recovered in a storage module; when the power stored in the power conversion module is not full, controlling the storage module to transport the hydrogen gas to be recovered to the power conversion module; when the power stored in the power conversion module is sufficient, controlling the storage module to transport the hydrogen gas to be recovered to an adsorption and emission module.
[0010] In some embodiments of this application, based on the foregoing scheme, storing the hydrogen to be recovered in the storage module includes: conveying the hydrogen to be recovered to a first buffer tank until the volume of the hydrogen to be recovered in the first buffer tank reaches a first preset volume; compressing the hydrogen to be recovered to a second preset pressure using a hydrogen compressor, and conveying it to a second buffer tank.
[0011] In some embodiments of this application, based on the foregoing scheme, controlling the storage module to deliver the hydrogen to be recovered to the power conversion module includes: delivering the hydrogen to be recovered to a hydrogen power generation device, converting the hydrogen into electrical energy through the hydrogen power generation device; and delivering the electrical energy to a storage battery for storage.
[0012] In some embodiments of this application, based on the foregoing scheme, controlling the storage module to deliver the hydrogen to be recovered to the adsorption and emission module includes: obtaining the volume of the hydrogen to be recovered in the second buffer tank; when the volume of the hydrogen to be recovered in the second buffer tank is greater than a second preset volume, sequentially delivering the hydrogen to be recovered to the first adsorber and the second adsorber, adsorbing the hydrogen to be recovered by the adsorbent, and emitting the remaining hydrogen to the outside.
[0013] In some embodiments of this application, based on the foregoing scheme, the preset temperature is 20°C to 25°C.
[0014] In some embodiments of this application, based on the aforementioned scheme, the first preset pressure is 0.1 MPa, and the second preset pressure is 0.6 MPa to 0.8 MPa.
[0015] Based on the technical solution proposed in this application, the overflow low-temperature hydrogen is regulated by a heating and pressurizing device, the storage module buffers and stabilizes the pressure to prevent the storage tank from overpressure and exploding, the power conversion module converts hydrogen into electrical energy for use, which can reduce dependence on the external power grid and reduce the possibility of explosion caused by hydrogen emissions, and the adsorption emission module is used to adsorb most of the hydrogen to reduce the amount of hydrogen emitted and reduce the risk of forming explosive mixtures, thereby effectively improving the safety of the hydrogen recovery process.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 A schematic diagram of the structure of a liquid hydrogen storage tank recovery system is shown in one embodiment of this application; Figure 2 A flowchart of a control method for a liquid hydrogen storage tank recovery system according to one embodiment of this application is shown. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0020] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0021] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0022] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.
[0023] Liquid hydrogen has a low latent heat of vaporization and is easily evaporated. Even a small amount of heat leakage can cause a large amount of evaporation and vaporization of liquid hydrogen, leading to an increase in pressure in the liquid hydrogen storage tank. When the pressure in the storage tank increases to the upper limit of the tank's capacity, the hydrogen needs to be released. In the prior art, direct release is usually used. However, on the one hand, direct release of hydrogen will cause a large loss of hydrogen. On the other hand, due to the wide explosive range of hydrogen, direct release into the air may pose an explosion hazard, resulting in low safety. Based on this, this application proposes a liquid hydrogen storage tank recovery system and its control method to improve the safety of hydrogen recovery.
[0024] Next, we will combine Figure 1 The recovery system for the liquid hydrogen storage tank proposed in this application is described in detail.
[0025] See Figure 1 The diagram illustrates the structure of a liquid hydrogen storage tank recovery system according to one embodiment of this application. Figure 1As shown, the system may include at least a heating and pressurizing device 101, a storage module, an energy conversion module, and an adsorption and emission module. The storage module may include at least a first buffer tank 102, a hydrogen compressor 103, and a second buffer tank 104. The energy conversion module may include at least a hydrogen power generation device 107, a transformer 108, and a battery 109. The adsorption and emission module may include at least a first adsorber 106a and a second adsorber 106b.
[0026] The heating and pressurizing device is connected to the liquid hydrogen storage tank via a pipeline. It can be used to heat and pressurize the low-temperature hydrogen gas overflowing from the liquid hydrogen storage tank to obtain hydrogen gas to be recovered. Specifically, heating the low-temperature hydrogen gas can be done by raising the temperature of the hydrogen gas to room temperature (about 20°C to 25°C), and pressurizing the low-temperature hydrogen gas can be done by increasing the pressure of the hydrogen gas to about 0.1MPa to 0.2MPa. This application does not make specific limitations on these aspects.
[0027] In this application, the low-temperature hydrogen is heated and pressurized by a heating and pressurizing device, which can make the physical state of the hydrogen more stable. This can reduce the number of accidents caused by excessively low hydrogen temperature or unstable pressure during the emission process. For example, excessively low hydrogen temperature can cause the contact objects to become brittle (such as pipes and valves), or the pressure can fluctuate with temperature changes, which can lead to equipment damage. This can improve the safety of the hydrogen recovery process.
[0028] Continue to refer to Figure 1 The storage module can be used to store the hydrogen to be recovered. The storage module can include at least a first buffer tank 102, a hydrogen compressor 103, and a second buffer tank 104. The first buffer tank 102 is connected to the heating and pressurizing device 101 through a pipeline and can be used to initially store the hydrogen to be recovered. The hydrogen compressor 103 is connected to the first buffer tank 102 through a pipeline and can be used to compress the hydrogen to be recovered to a second preset pressure. The second buffer tank 104 is connected to the hydrogen compressor 103 through a pipeline and can be used to store the hydrogen to be recovered at the second preset pressure.
[0029] In this application, the second preset pressure can be 0.6MPa to 0.8MPa, or other pressures. The specific pressure can be determined according to the actual situation. This application does not make any specific limitation in this regard.
[0030] In this application, the first buffer tank 101 can buffer and smooth the fluctuation of the output pressure of the heating and pressurizing device 101 through volume buffering. When the hydrogen overflow rate in the liquid hydrogen tank suddenly increases, it will cause the output pressure of the heating and pressurizing device 101 to increase. The first buffer tank 102 can temporarily store excess hydrogen to be recovered, reduce the load on the hydrogen compressor 103, and thus improve the safety of the hydrogen recovery process.
[0031] In this application, the hydrogen to be recovered is compressed to a second preset pressure by the hydrogen compressor 103, which can increase the storage density and enable the second buffer tank 104 to store more hydrogen while ensuring safety. The second buffer tank 104 can be used to store most of the hydrogen. When the system pressure rises abnormally (such as continuous gas supply caused by compressor failure), the second buffer tank 104 can temporarily contain the excess hydrogen through its own volume. In addition, high-pressure storage can reduce the amount of hydrogen leakage and prevent the concentration of leaked hydrogen from reaching the explosion limit, thereby improving the safety of the hydrogen recovery process.
[0032] Continue to refer to Figure 1 The power conversion module and the storage module are connected via pipes. The power conversion module may include at least a hydrogen power generation device 107, a transformer 108, and a storage battery 109. The hydrogen power generation device 107 is connected to the second buffer tank 104 via a pipe, and a first electrically controlled valve 105a is also installed on the pipe. The hydrogen power generation device 107 can be used to convert the hydrogen to be recovered into electrical energy. The storage battery 109 is connected to the hydrogen power generation device 107 via wires and is used to store electrical energy and supply power to the system. The transformer 108 is connected to both the hydrogen power generation device 107 and the storage battery 109 via wires and can be used to transform the current output by the hydrogen power generation device 107 and input it into the storage battery 109.
[0033] In this application, the hydrogen power generation device may specifically be a small fuel cell stack, and the energy storage battery may specifically be a lithium battery. Depending on actual needs, it may also be other types of devices. This application does not make any specific limitations on these.
[0034] In this application, hydrogen is converted into electrical energy and stored through an electrical energy conversion module, which can significantly reduce the total amount of hydrogen that needs to be emitted and enable the hydrogen to be recovered to be converted into electrical energy for reuse. This reduces the probability of hydrogen accumulating in the environment to form an explosive mixture, thereby reducing safety risks.
[0035] In this application, the system is self-powered by a storage battery, which can effectively improve the stability of the system operation and avoid situations such as the heating and pressurization device failing to heat properly, the hydrogen compressor shutting down, or the adsorption and emission module failing due to external power outages. This prevents the hydrogen to be recovered from continuously leaking and accumulating due to the inability to handle it in time, and further improves the safety of the entire hydrogen recovery process.
[0036] Continue to refer to Figure 1 The adsorption and emission module is used to adsorb and emit the hydrogen to be recovered. The adsorption and emission module may include at least a first adsorber 106a and a second adsorber 106b. The first adsorber 106a is connected to the second buffer tank 104 through a pipeline. A first electrically controlled valve 105a, a second electrically controlled valve 105b, and a third electrically controlled valve 105c are also provided on the pipeline. The first adsorber 106a can be used for preliminary adsorption of the hydrogen to be recovered to be emitted. The second adsorber 106b is connected to the first adsorber 106a through a pipeline and can be used for secondary adsorption of the hydrogen to be recovered to be emitted.
[0037] In this application, the adsorption materials of the first and second adsorbers can be selected from high-performance hydrogen adsorption materials, such as metal-organic frameworks, doped carbon nanotubes, etc., and this application does not make specific limitations in this regard.
[0038] In this application, the adsorption of most of the hydrogen to be recovered can be achieved by using a first adsorber (preliminary adsorption) and a second adsorber (secondary adsorption), thereby reducing the amount of hydrogen emitted into the atmosphere and thus reducing the probability of hydrogen accumulating beyond the explosion limit after emission, improving the safety of the hydrogen recovery process. At the same time, after the adsorbent that has adsorbed most of the hydrogen to be recovered is desorbed, the adsorbed hydrogen can be recycled again, thereby reducing hydrogen loss.
[0039] Next, we will combine Figure 2 The control method for the recovery system of the liquid hydrogen storage tank proposed in this application is described in detail.
[0040] See Figure 2 A flowchart illustrating a control method for a liquid hydrogen storage tank recovery system in one embodiment of this application is shown, such as... Figure 2 As shown, the control method may include at least the following steps 210 to 230: Step 210: The temperature of the low-temperature hydrogen gas evaporated from the liquid hydrogen storage tank is raised to a preset temperature and the pressure of the low-temperature hydrogen gas is raised to a first preset pressure by a heating and pressurizing device to obtain hydrogen gas to be recovered, and the hydrogen gas to be recovered is stored in the storage module.
[0041] Step 220: When the stored power in the power conversion module is not full, control the storage module to deliver the hydrogen to be recovered to the power conversion module.
[0042] Step 230: When the power stored in the power conversion module is sufficient, control the storage module to deliver the hydrogen to be recovered to the adsorption and emission module.
[0043] In this application, the preset temperature can be specifically 20°C to 25°C, and the first preset pressure can be specifically 0.1MPa to 0.2MPa. This application does not make specific limitations on these.
[0044] In this application, when the power stored in the power conversion module is not full, the storage module is prioritized to transport the hydrogen to be recovered to the power conversion module. This can convert most of the overflowing hydrogen into electrical energy, thereby greatly reducing the total amount and frequency of hydrogen that needs to be directly emitted, reducing the probability of hydrogen accumulating beyond the explosion limit after emission, and thus improving the safety of the hydrogen recovery process.
[0045] Furthermore, in step 210 above, storing the hydrogen to be recovered into the storage module can be specifically performed according to steps 211 to 212 as follows: Step 211: The hydrogen to be recovered is transported to the first buffer tank until the volume of the hydrogen to be recovered in the first buffer tank reaches the first preset volume.
[0046] Step 212: The hydrogen to be recovered is compressed to a second preset pressure using a hydrogen compressor and then transported to a second buffer tank.
[0047] In this application, the second preset pressure can be specifically from 0.6MPa to 0.8MPa, and this application does not make a specific limitation.
[0048] In this application, the first preset volume can specifically be the volume of the first buffer tank. That is, the process of delivering the hydrogen to be recovered to the first buffer tank until the volume of the hydrogen to be recovered in the first buffer tank reaches the first preset volume can specifically be the process of delivering the hydrogen to be recovered to the first buffer tank at a first preset pressure until the hydrogen to be recovered fills the first buffer tank at the first preset pressure.
[0049] In this application, by employing a graded buffering and stable pressurization method, the hydrogen to be recovered is stored in a first buffer tank and a second buffer tank. This improves the stability of hydrogen flow in the system, reduces the risk of hydrogen leakage, and thus lowers the probability of safety accidents caused by leakage. Furthermore, by compressing the hydrogen to increase the storage density, more hydrogen can be stored in the same storage space, reducing the need for frequent hydrogen discharge due to insufficient storage space. This reduces the probability of hydrogen accumulation exceeding the explosion limit after discharge, thereby improving the safety of the hydrogen recovery process.
[0050] Furthermore, in step 220 above, controlling the storage module to deliver the hydrogen to be recovered to the power conversion module can be specifically executed according to steps 221 to 222 as follows: Step 221: The hydrogen to be recovered is transported to a hydrogen power generation device, and the hydrogen is converted into electrical energy by the hydrogen power generation device.
[0051] Step 222: Transfer electrical energy to the storage battery for storage.
[0052] In this application, the process of transmitting electrical energy to a storage battery can specifically involve using a transformer to convert the electrical energy output from the hydrogen power generation device into a suitable voltage before transmitting the electrical energy to the storage battery. The electrical energy stored in the storage battery can then be used to power the recovery system of the liquid hydrogen storage tank.
[0053] In this application, when the stored electricity in the power conversion module is not full, the first electrically controlled valve can be opened and the second and third electrically controlled valves can be closed, so that the hydrogen to be recovered flows into the hydrogen power generation device, converting the hydrogen into electrical energy, reducing the amount and frequency of hydrogen emissions, and improving the safety of the hydrogen recovery process.
[0054] Furthermore, in step 230 above, controlling the storage module to deliver the hydrogen to be recovered to the adsorption and emission module can be specifically executed according to steps 231 to 232 as follows: Step 231: Obtain the volume of the hydrogen to be recovered in the second buffer tank.
[0055] Step 232: When the volume of the hydrogen to be recovered in the second buffer tank is greater than the second preset volume, the hydrogen to be recovered is sequentially transported to the first adsorber and the second adsorber, where the hydrogen to be recovered is adsorbed by the adsorbent, and the remaining hydrogen is discharged to the outside.
[0056] In this application, the second preset volume can specifically be 80% to 90% of the volume of the second buffer tank, and this application does not make a specific limitation in this regard.
[0057] In this application, by acquiring the volume of hydrogen to be recovered in the second buffer tank in real time and initiating discharge when the volume exceeds the second preset volume, the hydrogen pressure in the tank can be effectively prevented from becoming too high, thus avoiding tank rupture. Through multi-stage adsorption by the first and second adsorbers, most of the hydrogen (about 90%) can be adsorbed, so that only a small portion of the hydrogen is finally discharged to the outside, thereby reducing the probability of hydrogen accumulating beyond the explosion limit after discharge and improving the safety of the hydrogen recovery process.
[0058] Based on the technical solution proposed in this application, the state of the overflowing low-temperature hydrogen is regulated by a heating and pressurizing device, the storage module buffers and stabilizes the pressure to prevent the storage tank from overpressure and exploding, the power conversion module converts hydrogen into electrical energy for use, which can reduce dependence on the external power grid and reduce the possibility of explosion caused by hydrogen emissions, and the adsorption emission module is used to adsorb most of the hydrogen to reduce the amount of hydrogen emitted and reduce the risk of forming explosive mixtures, thereby effectively improving the safety of the hydrogen recovery process.
[0059] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A recovery system for a liquid hydrogen storage tank, characterized in that, The system includes a heating and pressurization device, a storage module, an energy conversion module, and an adsorption and emission module, wherein... The heating and pressurizing device is connected to the liquid hydrogen storage tank and is used to heat and pressurize the low-temperature hydrogen that overflows from the liquid hydrogen storage tank to obtain hydrogen to be recovered. The storage module is connected to the heating and pressurizing device via a pipeline and is used to store the hydrogen to be recovered. The power conversion module is connected to the storage module via a pipeline and is used to convert the hydrogen to be recovered into electrical energy and store it. The adsorption and emission module is connected to the storage module via a pipeline and is used to adsorb and emit the hydrogen to be recovered.
2. The system according to claim 1, characterized in that, The storage module includes: The first buffer tank, connected to the heating and pressurizing device via a pipeline, is used for the initial storage of hydrogen to be recovered. A hydrogen compressor, connected to the first buffer tank via a pipeline, is used to compress the hydrogen to be recovered to a second preset pressure; The second buffer tank is connected to the hydrogen compressor via a pipeline and is used to store hydrogen to be recovered at a second preset pressure.
3. The system according to claim 2, characterized in that, The power conversion module includes: A hydrogen power generation device is connected to the second buffer tank via a pipeline and is used to convert the hydrogen to be recovered into electrical energy. An energy storage battery, connected to the hydrogen power generation device via wires, is used to store electrical energy and supply power to the system.
4. The system according to claim 3, characterized in that, The adsorption and emission module includes: The first adsorber, connected to the second buffer tank via a pipeline, is used for the initial adsorption of hydrogen gas to be discharged and recovered. The second adsorber, connected to the first adsorber via a pipeline, is used for secondary adsorption of the hydrogen gas to be discharged and recovered.
5. A control method for the system as described in any one of claims 1 to 4, characterized in that, The method includes: The temperature of the low-temperature hydrogen gas evaporated from the liquid hydrogen storage tank is raised to a preset temperature by a heating and pressurizing device, and the pressure of the low-temperature hydrogen gas is raised to a first preset pressure to obtain hydrogen gas to be recovered, and the hydrogen gas to be recovered is stored in the storage module. When the energy stored in the power conversion module is not full, the storage module is controlled to deliver the hydrogen to be recovered to the power conversion module; When the power stored in the power conversion module is sufficient, the storage module is controlled to deliver the hydrogen to be recovered to the adsorption and emission module.
6. The method according to claim 5, characterized in that, The step of storing the hydrogen to be recovered into the storage module includes: The hydrogen to be recovered is transported to the first buffer tank until the volume of the hydrogen to be recovered in the first buffer tank reaches the first preset volume; The hydrogen to be recovered is compressed to a second preset pressure using a hydrogen compressor and then transported to a second buffer tank.
7. The method according to claim 5, characterized in that, The control of the storage module to deliver the hydrogen to be recovered to the power conversion module includes: The hydrogen to be recovered is transported to a hydrogen power generation device, which converts the hydrogen into electrical energy. Electrical energy is transferred to and stored in energy storage batteries.
8. The method according to claim 6, characterized in that, The control of the storage module to deliver the hydrogen to be recovered to the adsorption and emission module includes: Obtain the volume of the hydrogen to be recovered in the second buffer tank; When the volume of the hydrogen to be recovered in the second buffer tank is greater than the second preset volume, the hydrogen to be recovered is sequentially transported to the first adsorber and the second adsorber, where the hydrogen to be recovered is adsorbed by the adsorbent, and the remaining hydrogen is discharged to the outside.
9. The method according to claim 5, characterized in that, The preset temperature is 20°C to 25°C.
10. The method according to claim 6, characterized in that, The first preset pressure is 0.1 MPa, and the second preset pressure is 0.6 MPa to 0.8 MPa.