Organic liquid hydrogen storage and energy supply device

Abstract

The invention relates to the technical field of energy storage in the power industry, in particular to an organic liquid hydrogen storage and energy supply device which comprises a storage unit used for storing a hydrogen-rich organic carrier and a hydrogen-poor organic carrier at normal temperature and normal pressure; the first preheater is used for preheating the organic liquid before reaction; the catalytic hydrogenation reactor is used for storing hydrogen in organic liquid for storage operation; the first heat exchange cooler is used for cooling hydrogenation products to preliminarily separate hydrogen and a hydrogen-containing liquid mixture; the system has the advantages that the storage unit, the first preheater, the catalytic hydrogenation reactor, the first heat exchange cooler, the hydrogen storage tank, the second preheater, the catalytic dehydrogenation reactor, the second heat exchange cooler, the gas-liquid separator, the pressurizing device, the fuel cell stack, the heat storage tank and the third preheater are matched; the heat generated by the reaction is fully and more efficiently recovered for reutilization, so that the energy waste is greatly reduced, and the corresponding cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage in the power industry, and particularly to an organic liquid hydrogen storage and energy supply device. Background Art

[0002] Hydrogen energy, the chemical energy released by the chemical reaction of hydrogen and oxygen, is a secondary clean energy source, known as the "ultimate energy source in the 21st century", and is also a clean energy source that is being accelerated in development and utilization. Hydrogen mainly appears in the form of compounds on the earth and is the most widely distributed substance in the universe. Hydrogen energy may become a crucial energy source on the world energy stage in the 21st century, and the technologies for hydrogen production, storage, transportation, and application will also become the focus of much attention in the 21st century. Hydrogen has the characteristic of a high combustion calorific value, which is 3 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke. The product of hydrogen combustion is water, which is the cleanest energy source in the world, rich in resources, and sustainable.

[0003] The technical principle of liquid organic hydrogen storage is to achieve hydrogen storage by means of the reversible reaction and hydrogenation reaction of some unsaturated liquid organic compounds such as olefins, alkynes, or aromatic hydrocarbons with hydrogen, and to achieve hydrogen release by means of dehydrogenation reaction. The mass hydrogen storage density is 5%-10%, the hydrogen storage capacity is large, and the hydrogen storage material is a liquid organic compound, which can effectively solve the safety problems existing in the application of hydrogen. At present, a large amount of heat is generated during the energy supply operation of liquid organic hydrogen storage. By optimizing and reusing this heat, the energy consumption can be greatly reduced, thus greatly saving costs. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the above technical defects.

[0005] To this end, an object of the present invention is to provide an organic liquid hydrogen storage and energy supply device to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the present invention provides an organic liquid hydrogen storage and energy supply device, which includes a storage unit for storing hydrogen-rich organic carriers and hydrogen-poor organic carriers at normal temperature and pressure; a first preheater for preheating the organic liquid before the reaction; a catalytic hydrogenation reactor for storing hydrogen in the organic liquid for storage operation; a first heat exchange cooler for cooling the hydrogenation product to initially separate hydrogen from the hydrogen-containing liquid mixture; a hydrogen storage tank for storing the hydrogen-containing organic liquid; a second preheater for preheating the hydrogen-containing organic liquid; a catalytic dehydrogenation reactor for dehydrogenating the hydrogen-containing organic liquid; a second heat exchange cooler for cooling the dehydrogenated organic liquid and hydrogen; a gas-liquid separator for separating into dehydrogenated organic liquid and hydrogen; a pressurizing device for pressurizing hydrogen; a fuel cell stack for converting hydrogen into electricity for energy supply operation; a heat storage tank for storing heat for recycling; a third preheater for preheating the hydrogen for catalytic hydrogenation operation. The first heat exchange cooler is connected in parallel with the second heat exchange cooler and the fuel cell stack through a heat recovery pipeline. The second heat exchange cooler is connected to the heat storage tank through a heat recovery pipeline. The heat storage tank is connected in parallel with the first preheater, the second preheater, and the third preheater through a heat dispersion pipeline. The technical effect achieved by adopting the above solution is as follows: The organic liquid passes through the storage unit and enters the interior of the catalytic hydrogenation reactor through the first preheater. At the same time, hydrogen enters the catalytic hydrogenation reactor. Through the catalytic hydrogenation reactor, the organic liquid and hydrogen undergo a catalytic reaction so that hydrogen is stored in the organic liquid and enters the interior of the hydrogen storage tank for storage. When energy supply is required, the liquid mixture inside the hydrogen storage tank enters the catalytic dehydrogenation reactor through the second preheater for dehydrogenation operation. After the dehydrogenation operation, the hydrogen passes through the pressurizing device and enters the fuel cell stack for power generation through the gas-liquid separator. At the same time, the organic liquid is recovered and enters the interior of the storage unit. At the same time, the heat conduction medium recovers the heat of the fuel cell stack and the second heat exchange cooler through the parallel pipeline, and then enters the interior of the heat storage tank through the first heat exchange cooler to store the heat-absorbing medium. Then, through the pipeline on one side of the heat storage tank, the medium passes through the first preheater, the second preheater, and the third preheater, so that the heat is recycled during the power generation operation. The heat generated by the reaction can be fully recovered and reused, which can greatly reduce energy waste and thus save the corresponding costs.

[0007] Preferably, according to any of the above solutions, parallel pipes are connected to both sides of the fuel cell stack and the second heat exchange cooler. The fuel cell stack and the second heat exchange cooler are connected to the first heat exchange cooler through the parallel pipes on one side, and the fuel cell stack and the second heat exchange cooler are connected to the total inlet of the heat exchange medium through the parallel pipes on the other side. The technical effect achieved by adopting the above solution is that through the two groups of parallel pipes, the medium can adsorb and carry away the heat generated by the fuel cell stack and the second cooler and collect the medium, so that the medium can enter the internal of the heat storage tank for storage, thereby enabling rapid and efficient collection of heat for reuse.

[0008] Preferably, according to any of the above solutions, an electric three-way valve is provided at the diversion point of the parallel pipes on both sides of the fuel cell stack and the second heat exchange cooler. One end of the first heat exchange cooler is connected to the heat storage tank through an input heat pump. The technical effect achieved by adopting the above solution is that through the extraction of the input heat pump, the medium is driven to pass through the fuel cell stack, the second cooler and the first heat exchange cooler, so that the medium flows to adsorb the heat and store it in the internal of the heat storage tank for convenient subsequent reuse.

[0009] Preferably, according to any of the above solutions, one side of the heat storage tank is connected to each preheater through an output heat pump and a heat dispersion pipe. Check valves and regulating valves are provided on the branch pipes connecting the heat storage tank to the first preheater, the second preheater and the third preheater. The technical effect achieved by adopting the above solution is that through the operation of the output heat pump, the medium inside the heat storage tank can be extracted and the medium can pass through each preheater through the heat dispersion pipe, so that the preheater can perform corresponding preheating operations, thereby ensuring the reuse of heat.

[0010] Preferably, according to any of the above solutions, a temperature sensor and a liquid level sensor are provided inside the heat storage tank. The technical effect achieved by adopting the above solution is that through the extraction of the input heat pump, the medium is driven to pass through the fuel cell stack, the second cooler and the first heat exchange cooler, so that the medium flows to adsorb the heat and store it in the internal of the heat storage tank. Then, the temperature sensor and the liquid level sensor inside can monitor the temperature and quantity of the medium, so as to adjust the output of the preheater.

[0011] Preferably, according to any of the above solutions, the storage unit is sequentially connected to a first preheater, a catalytic hydrogenation reactor, a first heat exchange cooler, a hydrogen storage tank, a second preheater, a catalytic dehydrogenation reactor, a second heat exchange cooler, a gas-liquid separator, a pressurizing device, and a fuel cell stack. The gas-liquid separator is connected to the storage unit, and a check valve and a regulating valve are provided on the surface of the pipeline connecting the gas-liquid separator and the storage unit. The technical effect achieved by adopting the above solution is that the organic liquid passes through the storage unit and enters the interior of the catalytic hydrogenation reactor through the first preheater. At the same time, hydrogen enters the catalytic hydrogenation reactor. Through the catalytic hydrogenation reactor, the organic liquid and hydrogen undergo a catalytic reaction, enabling hydrogen to be stored in the organic liquid and enter the interior of the hydrogen storage tank for storage. When energy supply is required, the liquid mixture inside the hydrogen storage tank enters the catalytic dehydrogenation reactor through the second preheater for dehydrogenation operation. After the dehydrogenation operation, the hydrogen passes through the gas-liquid separator and enters the fuel cell stack through the pressurizing device for power generation, while the organic liquid is recycled and enters the interior of the storage unit.

[0012] Preferably, according to any of the above solutions, the third preheater is connected to the catalytic hydrogenation reactor. One side of the third preheater is connected to a compressor through a pipeline, and the storage unit is connected to the organic liquid feed main pipe through a booster pump body. The technical effect achieved by adopting the above solution is that the third preheater can preheat the hydrogen driven by the compressor, making it more convenient for subsequent operations.

[0013] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0014] This organic liquid hydrogen storage and energy supply device, through the cooperation among the storage unit, the first preheater, the catalytic hydrogenation reactor, the first heat exchange cooler, the hydrogen storage tank, the second preheater, the catalytic dehydrogenation reactor, the second heat exchange cooler, the gas-liquid separator, the pressurizing device, the fuel cell stack, the heat storage tank, and the third preheater, can fully and more efficiently recover the heat generated by the reaction for reuse, greatly reducing energy waste and thus saving corresponding costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention.

[0016] Wherein: 1 - storage unit, 2 - first preheater, 3 - catalytic hydrogenation reactor, 4 - first heat exchange cooler, 5 - hydrogen storage tank, 6 - second preheater, 7 - catalytic dehydrogenation reactor, 8 - second heat exchange cooler, 9 - gas-liquid separator, 10 - pressurizing device, 11 - fuel cell stack, 12 - heat storage tank, 13 - third preheater. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0018] Embodiment 1: As Figure 1 shown, an organic liquid hydrogen storage and energy supply device includes a storage unit 1 for storing hydrogen-rich organic carriers and hydrogen-poor organic carriers at normal temperature and pressure; a first preheater 2 for preheating the organic liquid before the reaction; a catalytic hydrogenation reactor 3 for storing hydrogen in the organic liquid for storage; a first heat exchange cooler 4 for cooling the hydrogenation product to initially separate hydrogen and a hydrogen-containing liquid mixture; a hydrogen storage tank 5 for storing the hydrogen-containing organic liquid; a second preheater 6 for preheating the hydrogen-containing organic liquid; a catalytic dehydrogenation reactor 7 for dehydrogenating the hydrogen-containing organic liquid; a second heat exchange cooler 8 for cooling the dehydrogenated organic liquid and hydrogen; a gas-liquid separator 9 for separating into dehydrogenated organic liquid and hydrogen; a pressurizing device 10 for pressurizing hydrogen; a fuel cell stack 11 for converting hydrogen into electricity for energy supply; a heat storage tank 12 for storing heat for recycling; a third preheater 13 for preheating the hydrogen for catalytic hydrogenation. The first heat exchange cooler 4 is connected in parallel with the second heat exchange cooler 8 and the fuel cell stack 11 through a heat recovery pipeline. The second heat exchange cooler 4 is connected to the heat storage tank 12 through a heat recovery pipeline. The heat storage tank 12 is connected in parallel with the first preheater 2, the second preheater 6, and the third preheater 13 through a heat dispersion pipeline. The organic liquid passes through the storage unit 1 and then through the first preheater 2 and enters the interior of the catalytic hydrogenation reactor 3. At the same time, hydrogen enters the catalytic hydrogenation reactor 3. Through the catalytic hydrogenation reactor 3, the organic liquid and hydrogen undergo a catalytic reaction so that hydrogen is stored in the organic liquid and enters the interior of the hydrogen storage tank 5 for storage. When energy supply is required, the liquid mixture inside the hydrogen storage tank 5 enters the catalytic dehydrogenation reactor 7 through the second preheater 6 for dehydrogenation. After the dehydrogenation is completed, the hydrogen passes through the pressurizing device 10 and enters the fuel cell stack 11 for power generation. At the same time, the organic liquid is recycled and enters the interior of the storage unit 1. At the same time, the heat conduction medium recovers the heat of the fuel cell stack 11 and the second heat exchange cooler 8 through a parallel pipeline, and then enters the interior of the heat storage tank 12 through the first heat exchange cooler 4 to store the absorbed heat. Then, the medium passes through the first preheater 2, the second preheater 6, and the third preheater 13 through the pipeline on one side of the heat storage tank 12, so that the heat is recycled during power generation, and the heat generated by the reaction can be fully recovered and reused, which can greatly reduce energy waste and thus save corresponding costs.

[0019] As an alternative technical solution of the present invention, parallel pipes are connected to both sides of the fuel cell stack 11 and the second heat exchange cooler 8. The fuel cell stack 11 and the second heat exchange cooler 8 are connected to the first heat exchange cooler 4 through the parallel pipes on one side, and the fuel cell stack 11 and the second heat exchange cooler 8 are connected to the total inlet of the heat exchange medium through the parallel pipes on the other side. Through the two groups of parallel pipes, the medium can adsorb and carry away the heat generated by the fuel cell stack 11 and the second cooler 8 and collect the medium, so that the medium can enter the inside of the heat storage tank 12 for storage, thereby enabling rapid and efficient collection of heat for reuse.

[0020] As an alternative technical solution of the present invention, an electric three-way valve is provided at the diversion point of the parallel pipes on both sides of the fuel cell stack 11 and the second heat exchange cooler 8. One end of the first heat exchange cooler 4 is connected to the heat storage tank 12 through an input heat pump. By pumping through the input heat pump, the medium is driven to pass through the fuel cell stack 11, the second cooler 8 and the first heat exchange cooler 4, so that the medium flows to adsorb the heat and then store it inside the heat storage tank 12 for convenient subsequent reuse.

[0021] As an alternative technical solution of the present invention, one side of the heat storage tank 12 is connected to each preheater through an output heat pump and a heat dispersion pipe. Check valves and regulating valves are provided on the branch pipes connecting the heat storage tank 12 to the first preheater 2, the second preheater 6 and the third preheater 13. By operating the output heat pump, the medium inside the heat storage tank 12 can be pumped out and passed through the heat dispersion pipe to make the medium pass through each preheater, so that the preheater can perform corresponding preheating operations, thereby ensuring the reuse of heat.

[0022] As an alternative technical solution of the present invention, a temperature sensor and a liquid level sensor are provided inside the heat storage tank 12. By pumping through the input heat pump, the medium is driven to pass through the fuel cell stack 11, the second cooler 8 and the first heat exchange cooler 4, so that the medium flows to adsorb the heat and then store it inside the heat storage tank 12. Then, the temperature and quantity of the medium can be monitored through the internal temperature sensor and liquid level sensor, thereby adjusting the output of the preheater.

[0023] As an alternative technical solution of the present invention, the storage unit 1 is sequentially connected to a first preheater 2, a catalytic hydrogenation reactor 3, a first heat exchange cooler 4, a hydrogen storage tank 5, a second preheater 6, a catalytic dehydrogenation reactor 7, a second heat exchange cooler 8, a gas-liquid separator 9, a pressurizing device 10 and a fuel cell stack 11. The gas-liquid separator 9 is connected to the storage unit 1. A check valve and a regulating valve are provided on the surface of the pipeline connecting the gas-liquid separator 9 and the storage unit 1. The organic liquid passes through the storage unit 1 and passes through the first preheater 2 and enters the interior of the catalytic hydrogenation reactor 3. At the same time, hydrogen enters the catalytic hydrogenation reactor 3. Through the catalytic hydrogenation reactor 3, the organic liquid and hydrogen undergo a catalytic reaction, so that hydrogen is stored in the organic liquid and enters the interior of the hydrogen storage tank 5 for storage. When energy supply is required, the liquid mixture inside the hydrogen storage tank 5 enters the catalytic dehydrogenation reactor 7 through the second preheater 6 for dehydrogenation operation. After the dehydrogenation operation is completed, the hydrogen passes through the pressurizing device 10 through the gas-liquid separator 9 and enters the fuel cell stack 11 for power generation. At the same time, the organic liquid is recovered and enters the interior of the storage unit 1.

[0024] As an alternative technical solution of the present invention, a third preheater 13 is connected to the catalytic hydrogenation reactor 3. One side of the third preheater 13 is connected to a compressor through a pipeline. The storage unit 1 is connected to the organic liquid feed main pipe through a booster pump body. The third preheater 13 can preheat the hydrogen driven by the compressor, so as to facilitate subsequent operations more conveniently.

[0025] An organic liquid hydrogen storage and energy supply device has the following working principle: The organic liquid passes through the storage unit 1 and passes through the first preheater 2 and enters the interior of the catalytic hydrogenation reactor 3. At the same time, hydrogen enters the catalytic hydrogenation reactor 3. Through the catalytic hydrogenation reactor 3, the organic liquid and hydrogen undergo a catalytic reaction, so that hydrogen is stored in the organic liquid and enters the interior of the hydrogen storage tank 5 for storage. When energy supply is required, the liquid mixture inside the hydrogen storage tank 5 enters the catalytic dehydrogenation reactor 7 through the second preheater 6 for dehydrogenation operation. After the dehydrogenation operation is completed, the hydrogen passes through the pressurizing device 10 through the gas-liquid separator 9 and enters the fuel cell stack 11 for power generation. At the same time, the organic liquid is recovered and enters the interior of the storage unit 1. At the same time, the heat-conducting medium recovers the heat of the fuel cell stack 11 and the second heat exchange cooler 8 through a parallel pipeline, and then enters the interior of the heat storage tank 12 through the first heat exchange cooler 4 for the medium that has absorbed heat to be stored. Then, through the pipeline on one side of the heat storage tank 12, the medium passes through the first preheater 2, the second preheater 6 and the third preheater 13, so that the heat is recycled during the power generation operation, and the heat generated by the reaction can be fully recovered and reused, which can greatly reduce energy waste and thus save the corresponding costs.

[0026] In summary, the organic liquid hydrogen storage and energy supply device can fully recover and reuse the heat generated by the reaction through the cooperation among the storage unit 1, the first preheater 2, the catalytic hydrogenation reactor 3, the first heat exchange cooler 4, the hydrogen storage tank 5, the second preheater 6, the catalytic dehydrogenation reactor 7, the second heat exchange cooler 8, the gas-liquid separator 9, the pressurizing device 10, the fuel cell stack 11, the heat storage tank 12, and the third preheater 13, which can greatly reduce energy waste and thus save the corresponding costs.

Claims

1. An organic liquid hydrogen storage and energy supply device, comprising: A storage unit (1) for storing hydrogen-rich organic carriers and hydrogen-poor organic carriers at normal temperature and pressure; A first preheater (2) for preheating the organic liquid before the reaction; A catalytic hydrogenation reactor (3) for storing hydrogen in the organic liquid for storage operation; A first heat exchange cooler (4) for cooling the hydrogenation product to initially separate hydrogen and a hydrogen-containing liquid mixture; A hydrogen storage tank (5) for storing the hydrogen-containing organic liquid; A second preheater (6) for preheating the hydrogen-containing organic liquid; A catalytic dehydrogenation reactor (7) for dehydrogenating the hydrogen-containing organic liquid; A second heat exchange cooler (8) for cooling the dehydrogenated organic liquid and hydrogen; A gas-liquid separator (9) for separating into a dehydrogenated organic liquid and hydrogen; A pressurizing device (10) for pressurizing hydrogen; A fuel cell stack (11) for converting hydrogen into electricity for energy supply operation; A heat storage tank (12) for storing heat for recycling; A third preheater (13) for preheating the hydrogen for catalytic hydrogenation operation; characterized in that: The first heat exchange cooler (4) is connected in parallel with the second heat exchange cooler (8) and the fuel cell stack (11) through a heat recovery pipeline, the second heat exchange cooler (4) is connected to the heat storage tank (12) through a heat recovery pipeline, and the heat storage tank (12) is connected in parallel with the first preheater (2), the second preheater (6) and the third preheater (13) through a heat dispersion pipeline.

2. The organic liquid hydrogen storage and energy supply device according to claim 1, characterized in that: Parallel pipelines are connected to both sides of the fuel cell stack (11) and the second heat exchange cooler (8). The fuel cell stack (11) and the second heat exchange cooler (8) are connected to the first heat exchange cooler (4) through the parallel pipeline on one side, and the fuel cell stack (11) and the second heat exchange cooler (8) are connected to the total inlet of the heat exchange medium through the parallel pipeline on the other side.

3. An organic liquid hydrogen storage and energy supply device according to claim 2, characterized in that: An electric three-way valve is provided at the diversion point of the parallel pipelines on both sides of the fuel cell stack (11) and the second heat exchange cooler (8), and one end of the first heat exchange cooler (4) is connected to the heat storage tank (12) through an input heat pump.

4. The organic liquid hydrogen storage and energy supply device according to claim 3, wherein: One side of the heat storage tank (12) is connected to each preheater through an output heat pump and a heat dispersion pipeline. Check valves and regulating valves are provided on the branch pipes connecting the heat storage tank (12) to the first preheater (2), the second preheater (6) and the third preheater (13).

5. The organic liquid hydrogen storage and energy supply device according to claim 4, characterized in that: A temperature sensor and a liquid level sensor are provided inside the heat storage tank (12).

6. The organic liquid hydrogen storage and energy supply device according to claim 5, characterized in that: The storage unit (1) is sequentially connected to the first preheater (2), the catalytic hydrogenation reactor (3), the first heat exchange cooler (4), the hydrogen storage tank (5), the second preheater (6), the catalytic dehydrogenation reactor (7), the second heat exchange cooler (8), the gas-liquid separator (9), the pressurizing device (10) and the fuel cell stack (11). The gas-liquid separator (9) is connected to the storage unit (1), and check valves and regulating valves are provided on the surface of the pipeline connecting the gas-liquid separator (9) to the storage unit (1).

7. An organic liquid hydrogen storage and energy supply device according to claim 6, characterized in that: The third preheater (13) is connected to the catalytic hydrogenation reactor (3). One side of the third preheater (13) is connected to a compressor through a pipeline. The storage unit (1) is connected to the organic liquid feed main pipe through a booster pump body.

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