A system and method for increasing the unloading rate of hydrogen long tube trailers at hydrogen filling stations

Abstract

The application discloses a system and method for improving the hydrogen unloading rate of a hydrogen long-pipe trailer at a hydrogen filling station. The device comprises: a solid-state hydrogen storage tank hydrogen filling assembly front-end gas inlet connected to the outlet manifold of the unloading column, and a rear-end gas outlet connected to the hydrogen filling port of the solid-state hydrogen storage tank assembly; a solid-state hydrogen storage tank hydrogen releasing port connected to the hydrogen compressor gas inlet through the solid-state hydrogen storage tank hydrogen releasing assembly; a heating and cooling water circulation system connected to the solid-state hydrogen storage tank assembly; and a control device electrically connected to the solid-state hydrogen storage tank hydrogen filling assembly, the heating and cooling water circulation system and the solid-state hydrogen storage tank hydrogen releasing assembly, which can cooperatively control the solid-state hydrogen storage tank hydrogen filling assembly and the heating and cooling water circulation system to regulate the optimal hydrogen filling and releasing temperature in the solid-state hydrogen storage tank assembly during the hydrogen unloading process of the hydrogen long-pipe trailer through the unloading hose, the unloading column and the solid-state hydrogen storage tank hydrogen filling assembly to the solid-state hydrogen storage tank assembly. The system can improve the hydrogen unloading rate of the hydrogen long-pipe trailer and reduce the hydrogen transportation cost without significantly increasing the floor area.

Description

Technical Field

[0001] This invention relates to the field of hydrogen supply via long-tube trailers at high-pressure gaseous hydrogen refueling stations, and more particularly to a system and method for improving the unloading rate of hydrogen via long-tube trailers at hydrogen refueling stations. Background Technology

[0002] Hydrogen refueling stations are crucial infrastructure for the application of hydrogen energy in the transportation sector. High-pressure gaseous hydrogen refueling stations, which supply hydrogen externally, typically use hydrogen tube trailers. Due to the limitation of the hydrogen compressor inlet pressure range of 5–30 MPa within the refueling station, hydrogen tube trailers with a rated transport pressure of 20 MPa typically have a residual pressure between 8 and 12 MPa after unloading hydrogen, with an unloading rate mostly around 75%, rarely exceeding 80%. It is estimated that the cost of transporting hydrogen by tube trailers accounts for a significant proportion of the total cost of refueling vehicles at a hydrogen refueling station, generally exceeding 20%, and even surpassing the proportion of depreciation costs of major equipment such as hydrogen compressors, stationary hydrogen storage tanks, and hydrogen dispensers over their design lifespan. Therefore, further reducing the residual pressure after unloading and increasing the unloading rate to lower hydrogen transport costs is an urgent problem that needs to be solved from the perspective of reducing operating costs.

[0003] Chinese patent ZL202121184198.5 discloses a low-pressure hydrogen transfer and storage system for hydrogen refueling stations, which increases the hydrogen storage pressure to no more than 2 MPa and the volumetric hydrogen storage density to less than 1.6 kg / m³. 3 The low-pressure hydrogen storage tank further unloads hydrogen gas below 6 MPa from the hydrogen tube trailer to the hydrogen refueling station until the residual pressure in the hydrogen tube trailer is less than 1 MPa. Because the hydrogen storage mass and volumetric hydrogen storage density of a simple low-pressure gaseous hydrogen storage tank are very low, the volume of the added low-pressure hydrogen storage tank is too large.

[0004] Currently, existing literature also mentions a method to improve the unloading rate of hydrogen tube trailers by using a hydrogen compressor to transfer hydrogen between cylinders. The principle is as follows: after the pressure in all the hydrogen storage cylinders on the tube trailer drops to the typical residual pressure range of 8-12 MPa after unloading, a separately installed low-intake-pressure hydrogen compressor at the station draws hydrogen from some of the cylinders on the tube trailer, pressurizes it, and discharges it into several other hydrogen storage cylinders on the tube trailer until the pressure inside the cylinders reaches 20 MPa. When a vehicle enters the station to refuel, these high-pressure cylinders on the tube trailer can continue to release some hydrogen, thus improving the unloading rate to some extent. However, because this method requires charging and discharging hydrogen from the storage cylinders in the tube trailer, it significantly increases the dwell time of the tube trailer at the station. Furthermore, the need to operate the station's hydrogen compressor increases the station's energy consumption and costs.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a system and method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations. It can utilize a solid-state hydrogen storage device to increase the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations, and can reduce the residual pressure of the hydrogen storage cylinder in the hydrogen long-tube trailer after unloading from more than 8 MPa to less than 1 MPa, thereby solving the above-mentioned technical problems existing in the prior art.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A system for improving the unloading rate of hydrogen from long-tube trailers at hydrogen refueling stations includes:

[0010] The system includes a solid hydrogen storage tank filling assembly, a solid hydrogen storage tank assembly, at least one set of solid hydrogen storage tank discharging assemblies, a hydrogen compressor, a cooling water circulation system, a heating water circulation system, and a control device; wherein...

[0011] The inlet at the front end of the hydrogen filling assembly of the solid hydrogen storage tank is used to connect to the outlet manifold of the unloading column, and the outlet at the rear end of the hydrogen filling assembly of the solid hydrogen storage tank is connected to the hydrogen filling port of the solid hydrogen storage tank assembly.

[0012] The hydrogen discharge port of the solid hydrogen storage tank assembly is connected to the inlet of the hydrogen compressor through the solid hydrogen storage tank hydrogen discharge assembly.

[0013] The cooling water circulation system is connected to the solid hydrogen storage tank assembly;

[0014] The heated water circulation system is connected to the solid hydrogen storage tank assembly;

[0015] The control device is electrically connected to the hydrogen filling assembly, cooling water circulation system, heating water circulation system, and hydrogen discharging assembly of the solid hydrogen storage tank, respectively. During the process of unloading hydrogen from the hydrogen long tube trailer to the solid hydrogen storage tank assembly via the unloading hose, unloading column, and hydrogen filling assembly, the device can coordinately control the hydrogen filling assembly and cooling water circulation system to maintain the optimal hydrogen filling temperature inside the solid hydrogen storage tank assembly, and coordinately control the heating water circulation system and hydrogen discharging assembly to maintain the optimal hydrogen discharging temperature inside the solid hydrogen storage tank assembly.

[0016] A method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations, using the system described in any one of claims 1-8, wherein after the normal unloading of the hydrogen cylinder group of the long-tube trailer is completed, the residual pressure is 8-12 MPa, the outlet manifold of the unloading column is switched to the inlet of the hydrogen filling assembly at the front end of the solid hydrogen storage tank in the system, and unloading continues according to the following steps:

[0017] Step S1: Adjust the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly:

[0018] The system's control device determines the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly. If it meets the requirement of fully storing the amount of hydrogen released when the residual pressure of the current hydrogen tube trailer cylinder group drops from 8-12 MPa to less than 1 MPa, the solid hydrogen storage tank filling assembly, the solid hydrogen storage tank assembly, and the cooling water circulation system enter a standby state. If it does not meet the requirement of full storage, the system's heating water circulation system is activated to heat and release hydrogen from the solid hydrogen storage tank assembly until the remaining hydrogen storage capacity of the solid hydrogen storage tank assembly is at least sufficient to fully store the amount of hydrogen released when the residual pressure of the current hydrogen tube trailer drops from 8-12 MPa to less than 1 MPa.

[0019] Step S2: Prepare for filling the solid hydrogen storage tank with hydrogen.

[0020] The safety self-test ensures that the hydrogen filling assembly of the solid hydrogen storage tank meets the hydrogen filling requirements.

[0021] Step S3: Perform hydrogen filling operation for the solid hydrogen storage tank:

[0022] The cooling water circulation system of the system is started by the control device according to the set program, and then the hydrogen charging component of the solid hydrogen storage tank is opened to start the hydrogen charging process of the solid hydrogen storage tank component.

[0023] Step S4: End the hydrogen filling operation of the solid hydrogen storage tank:

[0024] After the solid hydrogen storage tank assembly is filled with hydrogen, when the residual pressure of the hydrogen tube trailer cylinder group is lower than 1 MPa, first close the inlet valve of the hydrogen unloading hose connected to the hydrogen tube trailer, then close the solid hydrogen storage tank filling assembly, and then close the cooling water circulation system, thus completing the unloading of residual hydrogen from the hydrogen tube trailer.

[0025] Compared with the prior art, the system and method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations provided by the present invention have the following advantages:

[0026] By employing a solid hydrogen storage tank filling assembly, a solid hydrogen storage tank assembly, and a solid hydrogen storage tank discharging assembly connected in sequence, and under the control of a control device, the high volumetric hydrogen storage density of the solid hydrogen storage tank can be utilized to increase the unloading rate of hydrogen tube trailers at hydrogen refueling stations by more than 10%, and unload more than 30 kg of hydrogen per vehicle. This achieves a significant increase in the unloading rate of hydrogen tube trailers at hydrogen refueling stations and a reduction in hydrogen transportation costs without significantly increasing the floor space required. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the system configuration for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations, as provided in an embodiment of the present invention.

[0029] Figure 2 A flowchart illustrating a method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations, provided in an embodiment of the present invention.

[0030] Figure Descriptions: 1-Hydrogen long-tube trailer; 2-Unloading hose; 3-Unloading column; 4-Solid hydrogen storage tank filling assembly; 41-First explosion-proof automatic shut-off valve; 42-First electric explosion-proof regulating valve; 43-First hydrogen mass flow meter; 44-First pressure sensor; 45-First nitrogen purging port; 5-Solid hydrogen storage tank assembly; 50-Tank body; 51-Solid hydrogen storage material; 6-Solid hydrogen storage tank hydrogen discharge assembly; 61-Second explosion-proof automatic shut-off valve; 62-Second electric explosion-proof regulating valve; 63-Second hydrogen mass flow meter; 64-Second pressure sensor; 65- Second nitrogen purging port; 66-Hydrogen vent valve; 7-Cooling water circulation system; 71-Cooling water circulation tank assembly; 711-Cooling water circulation tank; 712-Cooling water circulation pump; 72-Cooling water temperature sensor; 73-Cooling water flow meter; 74-Cooling water pressure gauge; 8-Heating water circulation system; 81-Heating water circulation tank assembly; 811-Heating water circulation tank; 812-Heating water circulation pump; 82-Heating water temperature sensor; 83-Electric heater; 84-Heating water flow meter; 85-Heating water pressure gauge; 9-Hydrogen compressor; 10-Control device. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the specific content of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments, which do not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] First, the following explanations are provided for the terms that may be used in this article:

[0033] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0034] The terms “including,” “comprising,” “containing,” “having,” or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, “including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.)” should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0035] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0036] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0037] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0038] The system and method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations, provided by this invention, are described in detail below. Contents not described in detail in the embodiments of this invention are prior art known to those skilled in the art. Where specific conditions are not specified in the embodiments of this invention, conventional conditions or conditions recommended by the manufacturer in the art shall apply. Reagents or instruments used in the embodiments of this invention, unless otherwise specified by the manufacturer, are all commercially available conventional products.

[0039] like Figure 1 As shown, this embodiment of the invention provides a system for improving the unloading rate of hydrogen from long-tube trailers at hydrogen refueling stations, comprising:

[0040] The system comprises: a solid hydrogen storage tank filling assembly 4; at least one set of solid hydrogen storage tank assemblies 5; a solid hydrogen storage tank discharging assembly 6; a hydrogen compressor 9; a cooling water circulation system 7; a heating water circulation system 8; and a control device 10; wherein,

[0041] The inlet at the front end of the hydrogen filling assembly 4 of the solid hydrogen storage tank is used to connect to the outlet manifold of the unloading column 3, and the outlet at the rear end of the hydrogen filling assembly 4 of the solid hydrogen storage tank is connected to the hydrogen filling port of the solid hydrogen storage tank assembly 5.

[0042] The hydrogen discharge port of the solid hydrogen storage tank assembly 5 is connected to the inlet of the hydrogen compressor 9 through the solid hydrogen storage tank hydrogen discharge assembly 6.

[0043] The cooling water circulation system 7 is connected to the solid hydrogen storage tank assembly 5;

[0044] The heated water circulation system 8 is connected to the solid hydrogen storage tank assembly 5;

[0045] The control device 10 is electrically connected to the solid hydrogen storage tank filling assembly 4, the cooling water circulation system 7, the heating water circulation system 8, and the solid hydrogen storage tank discharging assembly 6, respectively. During the process of unloading hydrogen from the hydrogen long tube trailer 1 to the solid hydrogen storage tank assembly 5 via the unloading hose 2, the unloading column 3, and the solid hydrogen storage tank filling assembly 4, the control device 10 can coordinately control the solid hydrogen storage tank filling assembly 4 and the cooling water circulation system 7 to regulate the solid hydrogen storage tank assembly 5 to maintain the optimal hydrogen filling temperature, and coordinately control the heating water circulation system 8 and the solid hydrogen storage tank discharging assembly 6 to regulate the solid hydrogen storage tank assembly 5 to maintain the optimal hydrogen discharging temperature.

[0046] Preferably, in the above system, the solid hydrogen storage tank assembly 5 includes:

[0047] Tank body 50, solid hydrogen storage material 51 filled in the tank body, and heat exchange components; wherein,

[0048] The tank body 50 is provided with a hydrogen filling port and a hydrogen discharging port respectively. Preferably, the hydrogen filling port is provided at the front end of the tank body 50 and the hydrogen discharging port is provided at the rear end.

[0049] The heat exchange component is located inside the tank 50, which improves the heat exchange effect, so that the heat generated during the hydrogen absorption process can be carried away by the cooling water in time, and the heat required during the hydrogen release can be supplied by the heating water in time; the heat exchange component is provided with a water inlet and a water outlet respectively;

[0050] The water inlet and water outlet of the heat exchange component extend from the side of the tank 50, and both the water inlet and water outlet are connected to the cooling water circulation system 7 and the heating water circulation system 8.

[0051] Preferably, the heat exchange component may be provided with multiple water inlets and outlets, each set of water inlets and outlets extending from the side of the tank 50. One set of water inlets and outlets is connected to the cooling water circulation system 7; the other set of water inlets and outlets is connected to the heating water circulation system 8. Alternatively, the heat exchange component may be provided with only one set of water inlets and outlets, and the connection between the cooling water circulation system 7 and the heating water circulation system 8 may be switched by a pipeline equipped with a valve.

[0052] Preferably, the heat exchange component can be equipped with only one set of pipelines, which are used by the connected cooling water circulation system 7 and heating water circulation system 8 at the same time to achieve the purpose of cooling and heating the tank; the heat exchange component can be equipped with two sets of pipelines, which are arranged in parallel or in an alternating manner, with one set of pipelines connected to the cooling water circulation system 7 and the other set of pipelines connected to the heating water circulation system 8, and the two do not affect each other.

[0053] Preferably, the heat exchange component can be a smooth straight heat exchange tube, a smooth spiral heat exchange tube, a smooth U-shaped heat exchange tube, or various finned heat exchange tubes, etc.; the heat exchange component can also be set on the inner wall of the tank and adopt a jacketed heat exchange structure; the heat exchange component can also adopt an internal heat exchange tube and a jacketed heat exchange structure set on the inner wall of the tank at the same time.

[0054] In the above system, the solid hydrogen storage material 51 is preferably a titanium-iron based solid hydrogen storage material or a vanadium-based solid solution solid hydrogen storage material, and secondarily a rare earth based solid hydrogen storage material. Titanium-iron based solid hydrogen storage materials include, but are not limited to, TiFe and TiFe2O3. 1.924 Ti 0.95 FeZr 0.05 TiFe 0.95 Zr 0.05 TiFeZr 0.05 TiFe 0.86 Mn 0.04 Co 0.06 Ti Fe 0.8 Mn 0.18 Al 0.02 Zr 0.05 TiFe 0.8 Ni 0.2 Ti 1.09 Mg 0.01 Fe 0.9 Ni 0.1 Ti, Zr, Cr, Mn, Fe, Ni, V 0.48 Fe 0.12 Ti 0.15 Cr 0.25etc.; Vanadium-based solid solution solid hydrogen storage materials include, but are not limited to, V 0.7 Ti 0.1 Cr 0.2 Mg 2.1 Ni 0.7 V 0.3 ZrTiV 0.8 Ni2Cr 0.52 Mn 0.56 MgVCr, Ti 0.5 V 1.4 Cr 0.1 Ti 0.5 V 1.3 Ni 0.1 Co 0.1 Ti 0.9 Zr 0.1 Mn 1.2 V 0.4 Cr 0.4 Other V-Ti-Fe, V-Ti-Mn, V-Ti-Cr, and V-Ti-Ni alloys. Rare earth-based solid-state hydrogen storage materials include, but are not limited to, LaNi5, MmNi5, and La... 0.5 Ce 0.5 Ni4Co, MmNi 4.5 Al 0.5 Solid-state hydrogen storage materials are typically filled in one of the following forms: powder, granules, or briquettes. Briquettes are preferred, followed by granules, and then direct powder filling. These types of solid-state hydrogen storage materials release heat during hydrogen absorption and absorb heat during hydrogen release. Therefore, a thermal management system is needed to regulate the temperature of the solid-state hydrogen storage material system during hydrogen absorption and release, ensuring the amount and rate of hydrogen absorption and release. Titanium-iron based, vanadium-based solid solutions, and rare-earth based solid-state hydrogen storage materials have optimal hydrogen absorption and release temperatures between 20℃ and 95℃, and optimal absorption and release pressures between 0.1MPa and 10MPa, offering wide applicability to both hydrogen supply and consumption ends.

[0055] Preferably, in the above system, the cooling water circulation system 7 includes:

[0056] Cooling return water pipe, cooling outlet water pipe, cooling circulating water tank assembly 71, and cooling water temperature sensor 72; wherein,

[0057] One end of the cooling return water pipe is connected to the water outlet of the heat exchange component of the solid hydrogen storage tank assembly 5, and the other end of the cooling return water pipe is connected to the cooling return water port of the cooling circulating water tank assembly 71.

[0058] One end of the cooling water outlet pipe is connected to the cooling water outlet of the cooling circulating water tank assembly 71, and the other end of the cooling water outlet pipe is connected to the water inlet of the heat exchange component of the solid hydrogen storage tank assembly 5.

[0059] The cooling water temperature sensor 72 is installed on the cooling circulating water tank assembly 71 and can directly measure the water temperature in the cooling circulating water tank assembly 71.

[0060] Preferably, the cooling circulating water tank assembly 71 is composed of a cooling circulating water tank 711 and a cooling circulating water pump 712. If the cooling circulating water pump 712 is a submersible water pump, it is installed inside the cooling circulating water tank 711. If it is a non-submersible water pump, it is set outside the cooling circulating water tank 711 and connected to the cooling water outlet pipe.

[0061] Furthermore, the aforementioned cooling water circulation system 7 also includes a cooling water flow meter 73 and a cooling water pressure gauge 74. The cooling water flow meter 73 and the cooling water pressure gauge 74 are both installed on the cooling water outlet pipe and are installed between the outlet of the cooling water circulation pump 712 and the water inlet on the tank 50.

[0062] Preferably, in the above system, the heating water circulation system 8 includes:

[0063] The system includes a heated return water pipe, a heated outlet water pipe, a heated circulating water tank assembly 81, a heated water temperature sensor 82, and an electric heater 83; among which...

[0064] One end of the heating return water pipe is connected to the water outlet of the heat exchange component of the solid hydrogen storage tank assembly 5, and the other end of the heating return water pipe is connected to the heating return water port of the heating circulating water tank assembly 81.

[0065] One end of the heating water outlet pipe is connected to the heating water outlet of the heating circulating water tank assembly 81, and the other end of the heating water outlet pipe is connected to the water inlet of the heat exchange component of the solid hydrogen storage tank assembly 5.

[0066] The heating water temperature sensor 82 is installed on the heating circulating water tank assembly 81 and can directly measure the water temperature in the heating circulating water tank assembly 81.

[0067] The electric heater 83 is installed inside the heating circulating water tank assembly 81.

[0068] Preferably, the heating circulating water tank assembly 81 is composed of a heating circulating water tank 811 and a heating circulating water pump 812. If the heating circulating water pump 812 is a submersible pump, it is installed inside the heating circulating water tank 811. If it is a non-submersible pump, it is set outside the heating circulating water tank 811 and connected to the heating outlet pipe.

[0069] Furthermore, the aforementioned heating water circulation system 8 also includes a heating water flow meter 84 and a heating water pressure gauge 85. The heating water flow meter 84 and the heating water pressure gauge 85 are both installed on the heating water outlet pipe and are installed between the outlet of the heating circulating water pump 812 and the water inlet of the heat exchange component.

[0070] Preferably, in the above system, the solid hydrogen storage tank filling assembly 4 includes:

[0071] The system includes a hydrogen charging pipeline, a first nitrogen purging port 45, a first explosion-proof automatic shut-off valve 41, a first electric explosion-proof regulating valve 42, a first hydrogen mass flow meter 43, and a first pressure sensor 44; among which,

[0072] The hydrogen charging pipeline is connected between the outlet main pipe of the unloading column 3 and the hydrogen charging port of the solid hydrogen storage tank assembly 5.

[0073] The hydrogen charging pipeline is sequentially equipped with the first nitrogen purging port 45, the first explosion-proof automatic shut-off valve 41, the first electric explosion-proof regulating valve 42, the first hydrogen mass flow meter 43, and the first pressure sensor 44.

[0074] Preferably, in the above system, the solid hydrogen storage tank hydrogen release assembly 6 includes:

[0075] The system includes a hydrogen release pipeline, a second nitrogen purging port 65, a second explosion-proof automatic shut-off valve 61, a second electric explosion-proof regulating valve 62, a second hydrogen mass flow meter 63, a second pressure sensor 64, and a hydrogen venting valve 66; among which,

[0076] The hydrogen release pipeline is connected between the hydrogen release port of the solid hydrogen storage tank assembly 5 and the hydrogen compressor 9.

[0077] The hydrogen release pipeline is sequentially equipped with the second nitrogen purging port 65, the second explosion-proof automatic shut-off valve 61, the second electric explosion-proof regulating valve 62, the second hydrogen mass flow meter 63, the second pressure sensor 64, and the hydrogen release valve 66.

[0078] Preferably, in the above system, the solid hydrogen storage tank assembly 5 is a group, that is, a single solid hydrogen storage tank assembly 5 is used;

[0079] Alternatively, the solid hydrogen storage tank assembly 5 may be multiple sets connected in series, that is, multiple solid hydrogen storage tank assemblies 5 may be connected in series to form an integral solid hydrogen storage tank assembly.

[0080] Alternatively, the solid hydrogen storage tank assembly 5 may be composed of multiple sets connected in parallel, that is, multiple solid hydrogen storage tank assemblies 5 may be connected in parallel to form an integral solid hydrogen storage tank assembly.

[0081] Alternatively, the solid hydrogen storage tank assembly 5 may be multiple sets connected in series and parallel, that is, multiple solid hydrogen storage tank assemblies 5 may be connected in series and parallel to form an integral solid hydrogen storage tank assembly.

[0082] Preferably, the control device in the above system can be a single-chip microcomputer controller, which can pre-write control programs as needed to achieve coordinated control of the hydrogen filling component 4 of the solid hydrogen storage tank and the cooling water circulation system 7, or coordinated control of the hydrogen discharging component 6 of the solid hydrogen storage tank and the heating water circulation system 8.

[0083] like Figure 2 As shown, this embodiment of the invention also provides a method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations. Using the system described in this invention, after the normal unloading of the hydrogen cylinder group of the hydrogen long-tube trailer 1, the residual pressure is 8-12 MPa. The outlet main pipe of the unloading column 3 is switched to the inlet at the front end of the hydrogen filling assembly 4 of the solid hydrogen storage tank in the system, and unloading continues according to the following steps:

[0084] Step S1: Adjust the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly 5:

[0085] The control device 10 of the system determines the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly 5. If it meets the requirement of fully storing the amount of hydrogen released when the residual pressure of the current hydrogen long tube trailer 1 cylinder group drops from 8-12 MPa to less than 1 MPa, then the solid hydrogen storage tank charging assembly 4, the solid hydrogen storage tank assembly 5, and the cooling water circulation system 7 enter the standby state. If it does not meet the requirement of full storage, then the heating water circulation system 8 of the system is started to heat and release hydrogen from the solid hydrogen storage tank assembly 5 until the remaining hydrogen storage capacity of the solid hydrogen storage tank assembly 5 is at least sufficient to fully store the amount of hydrogen released when the residual pressure of the current hydrogen long tube trailer 1 drops from 8-12 MPa to less than 1 MPa.

[0086] Step S2: Prepare for filling the solid hydrogen storage tank with hydrogen.

[0087] The solid hydrogen storage tank hydrogen filling component 4 is subjected to a safety self-test to ensure that it meets the hydrogen filling requirements;

[0088] Step S3: Perform hydrogen filling operation for the solid hydrogen storage tank:

[0089] The cooling water circulation system 7 of the system is started by the control device 10 according to the set program, and then the hydrogen charging component 4 of the solid hydrogen storage tank is opened to start the hydrogen charging process of the solid hydrogen storage tank component 5.

[0090] Step S4: End the hydrogen filling operation of the solid hydrogen storage tank:

[0091] After the solid hydrogen storage tank assembly 5 is filled with hydrogen, when the residual pressure of the hydrogen long tube trailer 1 cylinder group is lower than 1MPa, first close the inlet valve of the hydrogen unloading hose 2 connected to the hydrogen long tube trailer 1, then close the solid hydrogen storage tank filling assembly 4, and then close the cooling water circulation system 7, thus completing the unloading of residual hydrogen from the hydrogen long tube trailer 1.

[0092] Preferably, in step S1 of the above method, the temperature at which the solid hydrogen storage tank assembly 5 is heated by the heating water circulation system 8 of the system is 40 to 95°C.

[0093] In summary, the system and method of this invention have significant advantages, including small additional floor space, wide adaptability to residual pressure of long-tube trailer hydrogen storage cylinder groups, large range of hydrogen release pressure adjustment with simple adjustment method, expansion of the service scope of hydrogen refueling stations, and improved operational efficiency of hydrogen refueling stations. Specifically, they have the following advantages:

[0094] (1) Utilizing solid hydrogen storage tanks with a capacity greater than 50 kg / m³ 3 The volumetric hydrogen storage density is achieved by significantly improving the unloading rate of hydrogen long tube trailers and reducing hydrogen transportation costs without significantly increasing the footprint.

[0095] (2) By utilizing the wide hydrogen filling pressure range of the solid hydrogen storage tank, which is 0.1 to 10 MPa, the residual pressure of the long tube trailer hydrogen storage cylinder group can be reduced to less than 1 MPa without the need for a hydrogen compressor to assist in the tank transfer operation.

[0096] (3) By utilizing the characteristic of adjusting the heat supply of the heating medium to regulate the hydrogen release pressure of the solid hydrogen storage tank, the hydrogen stored in the solid hydrogen storage tank can be fully discharged to the hydrogen storage cylinder group of the hydrogen refueling station without or with minimal operation of the hydrogen compressor.

[0097] (4) The addition of solid hydrogen storage tanks and their supporting systems can broaden the scope of services provided by hydrogen refueling stations, such as providing hydrogen filling services for forklifts, electric bicycles that are supplied with hydrogen fuel by solid hydrogen storage tanks, and various portable solid hydrogen storage units, thereby improving the operational efficiency of hydrogen refueling stations.

[0098] (5) In addition, it can also provide hydrogen source for hydrogen replacement after maintenance of the main hydrogen storage equipment and hydrogen pipeline in the hydrogen refueling station, saving the consumption of high-pressure hydrogen and avoiding the energy loss of pressure reduction and throttling when high-pressure hydrogen is used for replacement.

[0099] To more clearly demonstrate the technical solution and its effects provided by the present invention, the system and method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations provided by the present invention will be described in detail below with specific embodiments.

[0100] Example 1

[0101] like Figure 1 As shown, this embodiment provides a system for improving the unloading rate of hydrogen tube trailers at hydrogen refueling stations. The system removes a portion of the remaining hydrogen from the cylinder group of the hydrogen tube trailer via an unloading hose and an unloading column. It includes: a solid hydrogen storage tank filling assembly, a solid hydrogen storage tank assembly, a solid hydrogen storage tank discharging assembly, a cooling water circulation system, a heating water circulation system, and a control device; wherein...

[0102] The unloading hose is connected between the unloading main pipe of the hydrogen long tube trailer and the unloading column, and both ends are detachable connections.

[0103] The hydrogen filling assembly of the solid hydrogen storage tank is connected between the outlet manifold of the unloading column and the hydrogen filling port of the solid hydrogen storage tank assembly, with both ends being detachable connections.

[0104] The hydrogen release assembly of the solid hydrogen storage tank is connected between the hydrogen release port of the solid hydrogen storage tank assembly and the gas inlet of the hydrogen compressor, and both ends are detachable.

[0105] In a preferred embodiment, the aforementioned solid hydrogen storage tank assembly comprises at least one component. If multiple solid hydrogen storage tanks are used, they can be connected in series or in parallel. Specifically, a single solid hydrogen storage tank can be designed as a long cylinder, filled with solid hydrogen storage material and equipped with heat exchange components. The tank body is provided with connection ports for hydrogen absorption and release pipelines, and is equipped with safety accessories such as pressure sensors, temperature sensors, and safety valves. The tank body also has inlets and outlets for cooling circulating water and heating circulating water. The hydrogen storage material is preferably titanium-iron based or vanadium-based solid solution, and secondarily rare earth based. The solid hydrogen storage material is filled in at least one of powder, granules, or briquettes, with briquettes being the preferred filling method, granules the second choice, and direct powder filling the third choice. These types of hydrogen storage materials release heat when absorbing hydrogen and absorb heat when releasing hydrogen. A thermal management system is required to regulate the temperature of the solid hydrogen storage material system during hydrogen absorption and release, ensuring the amount and rate of hydrogen absorption and release. Titanium-iron based, vanadium-based solid solution, and rare earth based solid hydrogen storage materials have optimal hydrogen absorption / desorption temperatures ranging from 20℃ to 95℃ and optimal hydrogen absorption / desorption pressures ranging from 0.1MPa to 10MPa, offering wide applicability to both hydrogen supply and consumption ends. The hydrogen supply pressure at the supply end (e.g., cylinders on hydrogen tube trailers) can be as low as 0.5MPa, while the operating pressure at the consumption end (e.g., small to medium-sized solid hydrogen storage units in light vehicles such as forklifts, two-wheeled vehicles, and three-wheeled vehicles, and portable hydrogen consumption devices) can vary between 0.1 and 10MPa. Furthermore, the hydrogen supply pressure of these types of storage materials can be flexibly adjusted by regulating the system temperature, while the hydrogen supply flow rate can be adjusted by changing the number of parallel solid hydrogen storage tanks or by adjusting the valve opening.

[0106] In a preferred embodiment, an explosion-proof automatic shut-off valve and an electric explosion-proof regulating valve are respectively installed on the hydrogen filling assembly and the hydrogen discharging assembly of the solid hydrogen storage tank to control the on / off state of the hydrogen filling assembly and the hydrogen discharging assembly of the solid hydrogen storage tank, and to regulate the flow rate of hydrogen through these two pipelines.

[0107] In a preferred embodiment, a hydrogen mass flow meter is installed on the outlet manifold of the unloading column and on the hydrogen release assembly of the solid hydrogen storage tank to measure the amount of hydrogen added and released from the solid hydrogen storage tank.

[0108] In a preferred embodiment, a pressure sensor and a pressure regulator are installed on the hydrogen filling assembly and the hydrogen discharging assembly of the solid hydrogen storage tank, respectively, to monitor the hydrogen filling and discharging process of the solid hydrogen storage tank.

[0109] As a preferred embodiment, nitrogen purging ports and hydrogen venting valves are respectively installed on the unloading column outlet manifold, the hydrogen filling assembly of the solid hydrogen storage tank, and the hydrogen discharging assembly to ensure operational safety, maintenance, and replacement of parts.

[0110] In this invention, since the solid hydrogen storage material in the solid hydrogen storage tank releases heat when absorbing hydrogen and needs to absorb heat when releasing hydrogen, a cooling water circulation system and a heating water circulation system are set in the system to promptly remove the heat released during hydrogen absorption or introduce the heat required for hydrogen release.

[0111] In a preferred embodiment, the cooling water circulation system consists of a cooling water tank, a cooling water pump, and cooling water pipelines (including a cooling return pipe and a cooling outlet pipe). The cooling water tank is equipped with a temperature sensor to detect the water temperature, and the cooling water pipelines are equipped with a pressure gauge and a flow meter.

[0112] The heating water circulation system consists of a heating water tank, a heating water pump, and heating water pipelines (including a heating return pipe and a heating outlet pipe). The heating water tank is equipped with an electric heater and a temperature sensor to detect the water temperature, and the heating water pipelines are equipped with a pressure gauge and a flow meter.

[0113] The cooling and heating circulating water tanks are located near the solid hydrogen storage tank, preferably below it, serving as a support structure and saving floor space; alternatively, they are located on the side of the tank. The cooling circulating water pump is preferably a submersible pump, located inside the cooling circulating water tank; the heating circulating water pump is also preferably a submersible pump, located inside the heating circulating water tank. The outlets of both the cooling and heating circulating water pumps are detachably connected to one end of their respective circulating water pipelines.

[0114] In a preferred embodiment, an electric heater is also installed in the heating circulating water tank to heat the water in the tank, maintaining the water temperature between 40 and 95°C. This effectively increases the hydrogen release pressure of the solid hydrogen storage tank, allowing for the release and utilization of as much hydrogen as possible. Because the hydrogen release equilibrium pressure and release temperature of the solid hydrogen storage material are related, the temperature of the solid hydrogen storage material during hydrogen release can be controlled by changing the temperature of the heating circulating water, enabling controlled hydrogen release based on the pressure requirements of the hydrogen release target. The hydrogen release targets of the solid hydrogen storage tank include, but are not limited to, light vehicles such as forklifts, two-wheeled vehicles, and three-wheeled vehicles, as well as small and medium-sized solid hydrogen storage units in portable hydrogen-using devices.

[0115] Example 2

[0116] See Figure 2 This embodiment provides a method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations. It utilizes the system described in Embodiment 1 for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations. To enable the hydrogen long-tube trailer in the system provided by this invention to automatically switch to residual pressure unloading mode and continue unloading continuously and smoothly after unloading according to the conventional process, until the residual pressure is less than 1 MPa; simultaneously, when no unloading operation is performed, the hydrogen stored in the solid hydrogen storage tank assembly is released, allowing the hydrogen storage capacity of the solid hydrogen storage material to be fully regenerated, the supporting control logic and method of this invention includes the following steps:

[0117] Step S1: Determine the current remaining hydrogen storage capacity of the solid hydrogen storage tank.

[0118] When the long-tube trailer 1 is unloading gas according to the conventional procedure, the dedicated single-chip microcomputer control cabinet 10 judges the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly 5. If it meets the requirement of fully storing the amount of hydrogen released when the current residual pressure of the long-tube trailer 1 cylinder group drops from 8-12 MPa to less than 1 MPa, then the solid hydrogen storage tank filling assembly 4, the solid hydrogen storage tank assembly 5, and the cooling water circulation system 7 enter the standby state. If it does not meet the requirement of full storage, then the heating and hydrogen release operation is started until the remaining hydrogen storage capacity is at least sufficient to fully store the amount of hydrogen released when the current residual pressure of the long-tube trailer drops from 8-12 MPa to less than 1 MPa. Before performing the hydrogen release operation on the solid hydrogen storage tank assembly 5, a safety self-check is performed on the solid hydrogen storage tank hydrogen release assembly 6, including but not limited to checking the status of valves and instruments. If nitrogen purging and hydrogen replacement operations are required, the dedicated single-chip microcomputer control cabinet 10 will start the purging and replacement program to complete the purging and hydrogen replacement operations. A safety and equipment status check is also required on the heating circulating water system 8, including but not limited to checking the water tank level, heater power supply, water pump power supply, thermometer, pressure gauge, flow meter status, and whether there are any leaks.

[0119] Step S2: Prepare for hydrogen filling of the solid hydrogen storage tank (i.e., hydrogen unloading from the long-tube trailer due to residual pressure):

[0120] Before performing the hydrogen filling operation of the solid hydrogen storage tank assembly 5, a safety self-check is performed on the solid hydrogen storage tank filling assembly 4, including but not limited to checking the status of valves and instruments. If nitrogen purging and hydrogen replacement operations are required, the dedicated single-chip microcomputer control cabinet (i.e., control device 10) starts the corresponding program to complete the nitrogen purging and hydrogen replacement operations.

[0121] Step S3: Perform hydrogen filling operation on the solid hydrogen storage tank:

[0122] Under the premise that all conditions for charging hydrogen to the solid hydrogen storage tank assembly 5 are met, the dedicated single-chip microcomputer control cabinet (i.e., control device 10) first starts the cooling circulating water pump 712 according to the set program, then switches the outlet flow of the gas discharge column 3 to the solid hydrogen storage tank charging assembly 4, then opens the first explosion-proof automatic shut-off valve 41 on the solid hydrogen storage tank charging assembly, and adjusts the first electric explosion-proof regulating valve 42 to start the hydrogen charging process; during the hydrogen charging process, when the water temperature in the cooling circulating water tank 711 exceeds the set value, the cooling circulating water flow rate is increased to enhance heat exchange, and the opening of the first electric explosion-proof regulating valve 42 in the solid hydrogen storage tank charging assembly 4 is gradually reduced to reduce the intensity of hydrogen absorption and heat release.

[0123] Step S4: End the hydrogen filling operation of the solid hydrogen storage tank:

[0124] When the residual pressure of the first cylinder group of the long-tube trailer is lower than 1MPa, first close the inlet valve of the unloading hose 2, then close the first electric explosion-proof regulating valve 42 and the first explosion-proof automatic shut-off valve 41 on the hydrogen filling assembly 4 of the solid hydrogen storage tank, and then close the cooling circulating water pump 712.

[0125] In summary, the system and method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations according to the embodiments of the present invention have the following advantages compared with the prior art:

[0126] It can increase the unloading rate by more than 10% and unload more than 30 kg of hydrogen per vehicle, thereby significantly improving the unloading rate of hydrogen long-tube trailers and reducing hydrogen transportation costs without significantly increasing the footprint, by utilizing the high volumetric hydrogen storage density of solid hydrogen storage tanks. It has significant advantages such as small additional footprint, wide adaptability to residual pressure of hydrogen storage cylinders in long-tube trailers, large range of hydrogen release pressure adjustment with simple adjustment methods, broadening the service scope of hydrogen refueling stations, and improving the operational efficiency of hydrogen refueling stations, as detailed below:

[0127] By utilizing the wide hydrogen charging pressure range of 0.1 to 10 MPa of solid hydrogen storage tanks, the residual pressure of hydrogen storage cylinder groups in long-tube trailers can be reduced to less than 1 MPa without the need for a hydrogen compressor to assist in the tank transfer operation.

[0128] By utilizing the characteristic of adjusting the heat supply of the heating medium to regulate the hydrogen release pressure of the solid hydrogen storage tank, the hydrogen stored in the solid hydrogen storage tank can be fully discharged into the hydrogen storage cylinder group of the hydrogen refueling station without operating or with minimal operation of the hydrogen compressor.

[0129] Expand the scope of services offered by hydrogen refueling stations, such as providing hydrogen filling services for forklifts, electric bicycles that are supplied with hydrogen fuel in solid hydrogen storage tanks, and various portable solid hydrogen storage units, thereby improving the operational efficiency of hydrogen refueling stations.

[0130] In addition, it can provide a hydrogen source for hydrogen replacement after maintenance and repair of the main hydrogen storage equipment and hydrogen pipelines in hydrogen refueling stations, saving the consumption of high-pressure hydrogen and avoiding the energy loss of pressure reduction and throttling when using high-pressure hydrogen for replacement.

[0131] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of the present invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A system for improving the unloading rate of hydrogen from long-tube trailers at hydrogen refueling stations, characterized in that, include: The system includes a solid hydrogen storage tank filling assembly (4), at least one set of solid hydrogen storage tank assemblies (5), a solid hydrogen storage tank discharging assembly (6), a hydrogen compressor (9), a cooling water circulation system (7), a heating water circulation system (8), and a control device (10); wherein, The inlet at the front end of the hydrogen filling assembly (4) of the solid hydrogen storage tank is used to connect to the outlet manifold of the unloading column (3), and the outlet at the rear end of the hydrogen filling assembly (4) is connected to the hydrogen filling port of the solid hydrogen storage tank assembly (5); the hydrogen filling assembly (4) of the solid hydrogen storage tank includes: a hydrogen filling pipeline, a first nitrogen purging port (45), a first explosion-proof automatic shut-off valve (41), a first electric explosion-proof regulating valve (42), a first hydrogen mass flow meter (43), and a first pressure sensor (44); wherein, The hydrogen charging pipeline is connected between the outlet main pipe of the unloading column (3) and the hydrogen charging port of the solid hydrogen storage tank assembly (5); The hydrogen charging pipeline is sequentially equipped with the first nitrogen purging port (45), the first explosion-proof automatic shut-off valve (41), the first electric explosion-proof regulating valve (42), the first hydrogen mass flow meter (43), and the first pressure sensor (44); The hydrogen outlet of the solid hydrogen storage tank assembly (5) is connected to the inlet of the hydrogen compressor (9) through the solid hydrogen storage tank outlet assembly (6); the solid hydrogen storage tank assembly (5) includes: The tank body (50), the solid hydrogen storage material (51) filled in the tank body, and the heat exchange components; wherein, The tank body (50) is provided with a hydrogen filling port and a hydrogen discharging port respectively; The heat exchange component is disposed inside the tank body (50), and the heat exchange component is provided with a water inlet and a water outlet respectively; The water inlet and water outlet of the heat exchange component extend from the side of the tank (50), and both the water inlet and water outlet are connected to the cooling water circulation system (7) and the heating water circulation system (8); The solid hydrogen storage material (51) is any one of titanium-iron solid hydrogen storage material, vanadium-based solid solution solid hydrogen storage material and rare earth solid hydrogen storage material; the hydrogen absorption and desorption temperature range of the titanium-iron, vanadium-based solid solution and rare earth solid hydrogen storage materials is between 20℃ and 95℃, and the hydrogen absorption and desorption pressure is between 0.1MPa and 10MPa. The solid hydrogen storage material (51) is filled in at least one of the following forms: powder, granules, and briquettes; The hydrogen release assembly (6) of the solid hydrogen storage tank includes: The system includes a hydrogen release pipeline, a second nitrogen purging port (65), a second explosion-proof automatic shut-off valve (61), a second electric explosion-proof regulating valve (62), a second hydrogen mass flow meter (63), a second pressure sensor (64), and a hydrogen venting valve (66); among which, The hydrogen release pipeline is connected between the hydrogen release port of the solid hydrogen storage tank assembly (5) and the hydrogen compressor (9); The hydrogen release pipeline is sequentially equipped with the second nitrogen purging port (65), the second explosion-proof automatic shut-off valve (61), the second electric explosion-proof regulating valve (62), the second hydrogen mass flow meter (63), the second pressure sensor (64), and the hydrogen release valve (66); The cooling water circulation system (7) is connected to the solid hydrogen storage tank assembly (5); The heating water circulation system (8) is connected to the solid hydrogen storage tank assembly (5); The control device (10) is electrically connected to the hydrogen filling assembly (4), cooling water circulation system (7), heating water circulation system (8), and hydrogen discharging assembly (6) of the solid hydrogen storage tank, respectively. During the process of unloading gas from the hydrogen long tube trailer (1) to the solid hydrogen storage tank assembly (5) through the unloading hose (2), unloading column (3), and hydrogen filling assembly (4), the control device (10) coordinates the hydrogen filling assembly (4) and cooling water circulation system (7) to regulate the solid hydrogen storage tank assembly (5) to be at the optimal hydrogen filling temperature, and coordinates the heating water circulation system (8) and hydrogen discharging assembly (6) to regulate the solid hydrogen storage tank assembly (5) to be at the optimal hydrogen discharging temperature.

2. The system for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations according to claim 1, characterized in that, The titanium-iron based solid hydrogen storage material uses TiFe and TiFe. 1.924 Ti 0.95 FeZr 0.05 TiFe 0.95 Zr 0.05 TiFeZr 0.05 TiFe 0.86 Mn 0.04 Co 0.06 TiFe 0.8 Mn 0.18 Al 0.02 Zr 0.05 TiFe 0.8 Ni 0.2 Ti 1.09 Mg 0.01 Fe 0.9 Ni 0.1 Ti, Zr, Cr, Mn, Fe, Ni, V 0.48 Fe 0.12 Ti 0.15 Cr 0.25 At least one of them; The vanadium-based solid solution-type solid hydrogen storage material uses V 0.7 Ti 0.1 Cr 0.2 Mg 2.1 Ni 0.7 V 0.3 ZrTiV 0.8 Ni2Cr 0.52 Mn 0.56 MgVCr, Ti 0.5 V 1.4 Cr 0.1 Ti 0.5 V 1.3 Ni 0.1 Co 0.1 Ti 0.9 Zr 0.1 Mn 1.2 V 0.4 Cr 0.4 At least one of V-Ti-Fe, V-Ti-Mn, V-Ti-Cr, and V-Ti-Ni alloys; The rare earth-based solid hydrogen storage material uses LaNi5, MmNi5, and La 0.5 Ce 0.5 Ni4Co, MmNi 4.5 Al 0.5 At least one of them.

3. The system for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations according to claim 1, characterized in that, The cooling water circulation system (7) includes: Cooling return water pipe, cooling outlet water pipe, cooling circulating water tank assembly (71), and cooling water temperature sensor (72); among which, One end of the cooling return water pipe is connected to the water outlet of the heat exchange component of the solid hydrogen storage tank assembly (5), and the other end of the cooling return water pipe is connected to the cooling return water port of the cooling circulating water tank assembly (71). One end of the cooling water outlet pipe is connected to the cooling water outlet of the cooling circulating water tank assembly (71), and the other end of the cooling water outlet pipe is connected to the water inlet of the heat exchange component of the solid hydrogen storage tank assembly (5). The cooling water temperature sensor (72) is mounted on the cooling water circulation tank assembly (71); The heated water circulation system (8) includes: Heated return water pipe, heated outlet water pipe, heated circulating water tank assembly (81), heated water temperature sensor (82), and electric heater (83); among which, One end of the heating return water pipe is connected to the water outlet of the heat exchange component of the solid hydrogen storage tank assembly (5), and the other end of the heating return water pipe is connected to the heating return water port of the heating circulating water tank assembly (81). One end of the heating outlet pipe is connected to the heating outlet of the heating circulating water tank assembly (81), and the other end of the heating outlet pipe is connected to the water inlet of the heat exchange component of the solid hydrogen storage tank assembly (5). The heating water temperature sensor (82) is mounted on the heating circulating water tank assembly (81); The electric heater (83) is disposed inside the heating circulating water tank assembly (81).

4. The system for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations according to any one of claims 1-3, characterized in that, The solid hydrogen storage tank assembly (5) is a set; Alternatively, the solid hydrogen storage tank assembly (5) may be composed of multiple sets connected in series; Alternatively, the solid hydrogen storage tank assembly (5) may be composed of multiple sets connected in parallel; Alternatively, the solid hydrogen storage tank assembly (5) may be multiple sets connected in series and parallel.

5. A method for improving the unloading rate of hydrogen from a long-tube hydrogen trailer at a hydrogen refueling station, characterized in that, Using the system described in any one of claims 1-4, after the normal unloading of the hydrogen cylinder group of the hydrogen long-tube trailer (1) is completed, the residual pressure is 8-12 MPa. The outlet manifold of the unloading column (3) is switched to the inlet of the front end of the hydrogen filling assembly (4) of the solid hydrogen storage tank in the system, and the unloading continues according to the following steps: Step S1: Adjust the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly (5): The system's control device (10) determines the current remaining hydrogen storage capacity of the solid hydrogen storage tank assembly (5). If it meets the requirement of fully storing the amount of hydrogen released when the residual pressure of the current hydrogen tube trailer (1) cylinder group drops from 8 to 12 MPa to less than 1 MPa, then the solid hydrogen storage tank charging assembly (4), the solid hydrogen storage tank assembly (5), and the cooling water circulation system (7) enter a standby state. If it does not meet the full storage requirement, then the system's heating water circulation system (8) is activated to heat and release hydrogen from the solid hydrogen storage tank assembly (5) until the remaining hydrogen storage capacity of the solid hydrogen storage tank assembly (5) at least meets the requirement of fully storing the amount of hydrogen released when the residual pressure of the current hydrogen tube trailer (1) drops from 8 to 12 MPa to less than 1 MPa. Step S2: Prepare for filling the solid hydrogen storage tank with hydrogen. The solid hydrogen storage tank filling assembly (4) is subjected to a safety self-test to ensure that it meets the hydrogen filling requirements; Step S3: Perform hydrogen filling operation for the solid hydrogen storage tank: The cooling water circulation system (7) of the system is started according to the set program by the control device (10), and then the hydrogen charging assembly (4) of the solid hydrogen storage tank is opened to start the hydrogen charging process of the solid hydrogen storage tank assembly (5). Step S4: End the hydrogen filling operation of the solid hydrogen storage tank: After the solid hydrogen storage tank assembly (5) is filled with hydrogen, when the residual pressure of the hydrogen long tube trailer (1) cylinder group is lower than 1 MPa, first close the inlet valve of the hydrogen unloading hose (2) connected to the hydrogen long tube trailer (1), then close the solid hydrogen storage tank filling assembly (4), and then close the cooling water circulation system (7), thus completing the unloading of residual hydrogen from the hydrogen long tube trailer (1).

6. The method for improving the unloading rate of hydrogen long-tube trailers at hydrogen refueling stations according to claim 5, characterized in that, In step S1, the temperature at which the solid hydrogen storage tank assembly (5) is heated by the heating water circulation system (8) of the system is 40 to 95°C.

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