Concentrating solar heat collection circulating hydrogen charging device

Abstract

The utility model discloses a concentrating solar heat collection circulating hydrogen charging device which comprises a gas flowmeter, a hydrogen charging one-way valve, a concentrating solar heat collection device, a hydrogen inlet valve, a pressure gauge, a hydrogenation kettle, a hydrogen outlet valve and a hydrogen exhaust valve which are connected in sequence, a hydrogen filling circulating pipeline is arranged between a hydrogen outlet of the hydrogen outlet valve and a hydrogen inlet of the concentrating solar heat collecting device, a gas circulating pump is arranged on the hydrogen filling circulating pipeline, the hydrogenation kettle is internally used for filling a solid hydrogen storage material, a feeding valve is arranged on a feeding pipe at the upper part of the hydrogenation kettle, and a discharging valve is arranged on a discharging pipe at the lower part of the hydrogenation kettle. In the heating process, the risk of hydrogen fire or explosion caused by electric heating leakage is avoided, renewable solar energy is used as a heat source, the hydrogen energy storage efficiency and the energy utilization efficiency of a full chain can be remarkably improved, and meanwhile the heating efficiency of solid hydrogen storage materials can be remarkably improved through flowing hot hydrogen.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen energy storage equipment, specifically to a concentrated solar thermal collector and circulating hydrogen charging device. Background Technology

[0002] Hydrogen energy is considered to play a vital role in future energy utilization and sustainable development due to its advantages such as high energy density, cleanliness, environmental friendliness, renewability, convenient storage and transportation, and diverse applications. The storage and transportation of hydrogen is a key factor determining its economic viability, and mainly includes high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage, solid-state hydrogen storage, and organic-liquid hydrogen storage. Among these, solid-state hydrogen storage, which stores hydrogen in solid materials through physical or chemical adsorption, high-pressure compression, etc., offers advantages such as high hydrogen storage density, good safety, and long storage time, and is considered the most promising hydrogen storage technology.

[0003] Solid hydrogen storage materials, such as metal hydrides and hollow glass microspheres, typically require high temperatures (200–400°C) and high-pressure hydrogen conditions to achieve rapid hydrogen filling rates. Traditional heating methods mainly use electric heating rods or heat-conducting media to heat the hydrogen filling container and hydrogen. However, for solid hydrogen storage materials with low thermal conductivity (such as hollow glass microspheres), heating to the hydrogen filling temperature by heat conduction is usually time-consuming and energy-intensive. Furthermore, hydrogen is a flammable and explosive gas; even a small amount of hydrogen leakage or an electric spark during electric heating could pose a fire or explosion risk. Utility Model Content

[0004] To address the technical problems of long hydrogen charging time, high energy consumption, and insufficient safety in existing technologies, this utility model provides a concentrated solar thermal collector and circulating hydrogen charging device.

[0005] The concentrating solar collector and hydrogen charging device provided by this utility model includes a gas flow meter, a hydrogen charging one-way valve, a concentrating solar collector, a hydrogen charging vessel, and a gas circulation pump. The hydrogen inlet of the gas flow meter is connected to a compressed hydrogen inlet pipeline, the hydrogen outlet of the gas flow meter is connected to the hydrogen inlet of the hydrogen charging one-way valve by a pipeline, the hydrogen outlet of the hydrogen charging one-way valve is connected to the hydrogen inlet of the concentrating solar collector by a pipeline, the hydrogen outlet of the concentrating solar collector is connected to the hydrogen inlet of the hydrogen charging vessel by a pipeline, and the hydrogen outlet of the hydrogen charging vessel is connected to a compressed hydrogen outlet pipeline. An upstream pipeline is sequentially installed on the pipeline between the concentrating solar collector and the hydrogen charging vessel. The system includes a hydrogen inlet valve and a downstream pressure gauge. An upstream hydrogen outlet valve and a downstream hydrogen exhaust valve are sequentially installed on the compressed hydrogen outlet pipeline. A hydrogen charging and circulation pipeline is connected between the hydrogen outlet of the hydrogen outlet valve and the hydrogen inlet of the concentrating solar collector. A gas circulation pump is installed on the hydrogen charging and circulation pipeline. The hydrogen inlet of the gas circulation pump is connected to the hydrogen outlet of the hydrogen outlet valve via a pipeline, and the hydrogen outlet of the gas circulation pump is connected to the hydrogen inlet of the concentrating solar collector via a pipeline. The hydrogenation reactor is filled with solid hydrogen storage material. A feed valve is installed on the feed pipe at the top of the hydrogenation reactor, and a discharge valve is installed on the discharge pipe at the bottom of the hydrogenation reactor.

[0006] The operating steps of this utility model are as follows:

[0007] (1) Feeding: Close the hydrogen inlet valve, hydrogen outlet valve, discharge valve and hydrogen exhaust valve, and open the feed valve; add the pretreated hydrogen storage material (HSM, which has been pretreated under vacuum at 300°C to remove residual gas in the solid hydrogen storage material during the preparation process) to the hydrogenation reactor through the feed valve; after the solid hydrogen storage material has been loaded, close the feed valve.

[0008] (2) Heating hydrogen: 5-100MPa compressed hydrogen is pumped into the concentrating solar collector through a gas flow meter and a hydrogen charging check valve and heated to 150-400℃; wherein, the concentrating solar collector adopts existing technology and can use a simple structure and low cost trough type or linear Fresnel solar collector.

[0009] (3) Hydrogen charging: Keep the feed valve, discharge valve, and hydrogen exhaust valve closed, and open the hydrogen inlet valve and hydrogen outlet valve; adjust the hydrogen inlet valve and hydrogen outlet valve to regulate the pressure in the hydrogenation reactor to the charging pressure, and start charging the solid hydrogen storage material with hydrogen. The charging pressure is between 5 and 100 MPa. The hydrogen flowing out of the hydrogen outlet valve returns to the hydrogen inlet of the concentrating solar collector via the gas circulation pump, and is circulated and heated in the concentrating solar collector; at the same time, the solid hydrogen storage material HSM in the hydrogenation reactor is heated and charged with hydrogen until it reaches the saturated hydrogen charging state.

[0010] (4) Unloading: After hydrogen charging is completed, keep the feed valve and discharge valve closed, close the hydrogen inlet valve, open the hydrogen outlet valve and hydrogen exhaust valve, adjust the hydrogen outlet valve, and discharge the hydrogen in the hydrogenation reactor through the hydrogen exhaust valve; when the pressure in the hydrogenation reactor is close to atmospheric pressure, close the hydrogen outlet valve and hydrogen exhaust valve, open the discharge valve, and release the hydrogen-charged solid hydrogen storage material (HGM-H) into a room temperature container for storage;

[0011] (5) Cyclic hydrogen charging: Keep the hydrogen inlet valve, hydrogen outlet valve and hydrogen exhaust valve closed, close the discharge valve, open the feed valve, add the solid hydrogen storage material before charging to the hydrogenation kettle again, and then cycle through steps (2), (3) and (4) to achieve continuous hydrogen charging and unloading of the solid hydrogen storage material.

[0012] As an improvement, to fully utilize the hydrogen discharged through the hydrogen exhaust valve during the unloading process, thereby increasing hydrogen utilization and reducing costs, a hydrogen recycling pipeline is provided between the outlet of the hydrogen exhaust valve and the inlet of the gas flow meter. This hydrogen recycling pipeline includes a hydrogen collection tank, a hydrogen booster pump, and a hydrogen check valve. The hydrogen outlet of the hydrogen exhaust valve is connected to the hydrogen inlet of the hydrogen collection tank via a pipeline. The hydrogen outlet of the hydrogen collection tank is connected to the hydrogen inlet of the hydrogen booster pump via a pipeline. The hydrogen outlet of the hydrogen booster pump is connected to the hydrogen inlet of the hydrogen check valve via a pipeline. The hydrogen outlet of the hydrogen check valve is connected to the hydrogen inlet of the gas flow meter via a pipeline. A hydrogen inlet valve is provided on the pipeline between the hydrogen exhaust valve and the hydrogen collection tank, and a hydrogen outlet valve is provided on the pipeline between the hydrogen collection tank and the hydrogen booster pump.

[0013] This utility model has the following beneficial effects:

[0014] 1) This utility model integrates a concentrated solar thermal collector into a hydrogen charging system for solid hydrogen storage materials, eliminating the risk of hydrogen fire or explosion caused by electrical leakage during the heating process; at the same time, by using renewable solar energy as a heat source, it can significantly improve the energy utilization efficiency of the entire hydrogen storage and utilization chain; in addition, the flowing hot hydrogen can significantly improve the heating efficiency of solid hydrogen storage materials.

[0015] 2) The heating temperature range of the concentrated solar thermal collector for hydrogen is matched with the hydrogen addition temperature range of the solid hydrogen storage material, which can avoid the need for an additional constant temperature device and greatly simplify the hydrogen filling system and process.

[0016] 3) The hydrogen charging device of this utility model can realize the batch continuous hydrogen charging of solid hydrogen storage materials, which is conducive to expanding the scale of hydrogen charging. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a concentrating solar thermal collector and hydrogen charging device according to the present invention.

[0018] In the diagram: 1-Gas flow meter, 2-Hydrogen charging check valve, 3-Concentrating solar collector, 4-Hydrogen inlet valve, 5-Pressure gauge, 6-Hydrogen charging vessel, 7-Gas circulation pump, 8-Discharge valve, 9-Infeed valve, 10-Hydrogen outlet valve, 11-Hydrogen exhaust valve, 12-Hydrogen discharge inlet valve, 13-Hydrogen discharge collection tank, 14-Hydrogen discharge outlet valve, 15-Hydrogen discharge booster pump, 16-Hydrogen discharge check valve;

[0019] A - Compressed hydrogen, B - Exhausted hydrogen, C - Solid hydrogen storage material before hydrogen filling, D - Solid hydrogen storage material after hydrogen filling, E - Circulating hydrogen. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the concentrating solar collector hydrogen charging device provided by this utility model includes a gas flow meter 1, a hydrogen charging check valve 2, a concentrating solar collector 3, a hydrogen inlet valve 4, a pressure gauge 5, a hydrogen charging vessel 6, a hydrogen outlet valve 10, a hydrogen exhaust valve 11, a hydrogen discharge inlet valve 12, a hydrogen discharge collection tank 13, a hydrogen discharge outlet valve 14, a hydrogen discharge booster pump 15, and a hydrogen discharge check valve 16, which are connected in sequence by pipelines. The hydrogen discharge inlet valve 12, the hydrogen discharge collection tank 13, the hydrogen discharge outlet valve 14, the hydrogen discharge booster pump 15, and the hydrogen discharge check valve 16 form a hydrogen discharge recycling pipeline. A hydrogen charging circulation pipeline is provided between the hydrogen outlet of the hydrogen outlet valve 10 and the hydrogen inlet of the concentrating solar collector 3, and a gas circulation pump 7 is provided on the hydrogen charging circulation pipeline. The hydrogen charging vessel 6 is used to fill solid hydrogen storage material. A feed valve 9 is provided on the feed pipe at the top of the hydrogen charging vessel 6, and a discharge valve 8 is provided on the discharge pipe at the bottom of the hydrogen charging vessel 6.

[0022] The following is combined Figure 1 The operating steps of this utility model are as follows:

[0023] (1) Feeding: Close the hydrogen inlet valve 4, hydrogen outlet valve 10, discharge valve 8 and hydrogen exhaust valve 11, and open the feed valve 9; add the pretreated solid hydrogen storage material C before hydrogen charging to the hydrogenation kettle 6 through the feed valve 9. After the solid hydrogen storage material is loaded, close the feed valve 9.

[0024] (2) Heating hydrogen: 5-100MPa compressed hydrogen A is pumped into the concentrating solar collector 3 through gas flow meter 1 and hydrogen charging check valve 2 and heated to 150-400℃; wherein, the concentrating solar collector 3 adopts a trough type or linear Fresnel type solar collector.

[0025] (3) Hydrogen charging: Keep the feed valve 9, discharge valve 8 and hydrogen exhaust valve 11 closed, and open the hydrogen inlet valve 4 and hydrogen outlet valve 10; adjust the hydrogen inlet valve 4 and hydrogen outlet valve 10 to regulate the pressure in the hydrogenation vessel 6 to the hydrogen charging pressure, and start charging the solid hydrogen storage material with hydrogen. The hydrogen charging pressure is between 5 and 100 MPa. The circulating hydrogen E flowing out of the hydrogen outlet valve 10 returns to the hydrogen inlet of the concentrating solar collector 3 through the gas circulation pump 7, and is circulated and heated in the concentrating solar collector 3 to achieve circulating hydrogen charging; at the same time, the solid hydrogen storage material in the hydrogenation vessel 6 is simultaneously heated and charged with hydrogen until it reaches the saturated hydrogen charging state;

[0026] (4) Unloading: After hydrogen charging is completed, keep the feed valve 9 and the discharge valve 8 closed, close the hydrogen inlet valve 4, open the hydrogen outlet valve 10, the hydrogen exhaust valve 11 and the hydrogen discharge inlet valve 12, adjust the hydrogen outlet valve 11, and release the hydrogen in the hydrogenation vessel 6 as the discharged hydrogen B through the hydrogen exhaust valve 11 and the hydrogen discharge inlet valve 12 to the discharged hydrogen collection tank 13 for later pressurization and recycling; when the pressure in the hydrogenation vessel 6 is lower than 1MPa, close the hydrogen outlet valve 10 and the hydrogen exhaust valve 11, open the discharge valve 8, and release the hydrogen-charged solid hydrogen storage material D into a room temperature container for storage;

[0027] (5) Cyclic hydrogen charging: Keep the hydrogen inlet valve 4, hydrogen outlet valve 10 and hydrogen exhaust valve 11 closed, close the discharge valve 8, open the feed valve 9, add the solid hydrogen storage material C before charging to the hydrogenation kettle 6 again, and then cycle through steps (2), (3) and (4) to achieve continuous hydrogen charging and unloading of the solid hydrogen storage material.

[0028] (6) Hydrogen recycling: Close the hydrogen inlet valve 12, open the hydrogen outlet valve 14, start the hydrogen booster pump 15, and the hydrogen in the hydrogen collection tank 13 is pressurized and then enters the hydrogen filling process again through the hydrogen one-way valve 16 to realize the recycling of hydrogen.

Claims

1. A concentrating solar thermal collector and hydrogen charging device, characterized in that: The system includes a gas flow meter, a hydrogen-filling check valve, a concentrating solar collector, a hydrogen refueling vessel, and a gas circulation pump. The hydrogen inlet of the gas flow meter is connected to a compressed hydrogen inlet pipeline. The hydrogen outlet of the gas flow meter is connected to the hydrogen inlet of the hydrogen-filling check valve via a pipeline. The hydrogen outlet of the hydrogen-filling check valve is connected to the hydrogen inlet of the concentrating solar collector via a pipeline. The hydrogen outlet of the concentrating solar collector is connected to the hydrogen inlet of the hydrogen refueling vessel via a pipeline. The hydrogen outlet of the hydrogen refueling vessel is connected to a compressed hydrogen outlet pipeline. A hydrogen inlet valve is sequentially installed upstream and downstream on the pipeline between the concentrating solar collector and the hydrogen refueling vessel. The pressure gauge is located on the compressed hydrogen outlet pipeline, with an upstream hydrogen outlet valve and a downstream hydrogen exhaust valve. A hydrogen charging circulation pipeline is installed between the hydrogen outlet of the hydrogen outlet valve and the hydrogen inlet of the concentrating solar collector. A gas circulation pump is installed on the hydrogen charging circulation pipeline. The hydrogen inlet of the gas circulation pump is connected to the hydrogen outlet of the hydrogen outlet valve through a pipeline, and the hydrogen outlet of the gas circulation pump is connected to the hydrogen inlet of the concentrating solar collector through a pipeline. The hydrogenation reactor is used to fill solid hydrogen storage material. A feed valve is installed on the feed pipe at the top of the hydrogenation reactor, and a discharge valve is installed on the discharge pipe at the bottom of the hydrogenation reactor.

2. The concentrating solar thermal collector and hydrogen charging device according to claim 1, characterized in that: A hydrogen recycling pipeline is provided between the outlet of the hydrogen exhaust valve and the inlet of the gas flow meter. The hydrogen recycling pipeline includes a hydrogen collection tank, a hydrogen booster pump, and a hydrogen check valve. The hydrogen outlet of the hydrogen exhaust valve is connected to the hydrogen inlet of the hydrogen collection tank via a pipeline. The hydrogen outlet of the hydrogen collection tank is connected to the hydrogen inlet of the hydrogen booster pump via a pipeline. The hydrogen outlet of the hydrogen booster pump is connected to the hydrogen inlet of the hydrogen check valve via a pipeline. The hydrogen outlet of the hydrogen check valve is connected to the hydrogen inlet of the gas flow meter via a pipeline. A hydrogen inlet valve is provided on the pipeline between the hydrogen exhaust valve and the hydrogen collection tank, and a hydrogen outlet valve is provided on the pipeline between the hydrogen collection tank and the hydrogen booster pump.

3. The concentrating solar thermal collector and hydrogen charging device according to claim 1 or 2, characterized in that: The concentrating solar collector is a trough-type or linear Fresnel-type solar collector.

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