CN117646869B - Integrated low-consumption liquid hydrogen station hydrogenation system - Google Patents
Integrated low-consumption liquid hydrogen station hydrogenation system Download PDFInfo
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- CN117646869B CN117646869B CN202311722865.4A CN202311722865A CN117646869B CN 117646869 B CN117646869 B CN 117646869B CN 202311722865 A CN202311722865 A CN 202311722865A CN 117646869 B CN117646869 B CN 117646869B
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 135
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 135
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000007788 liquid Substances 0.000 title claims abstract description 64
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 43
- 239000003921 oil Substances 0.000 claims abstract description 85
- 230000008016 vaporization Effects 0.000 claims abstract description 35
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 238000009834 vaporization Methods 0.000 claims abstract description 22
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 150000002431 hydrogen Chemical class 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000010926 purge Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to an integrated low-consumption liquid hydrogen station hydrogenation system, which comprises a liquid hydrogen storage tank, a pressurizing module, a vaporizing module, a hydrogen storage bottle, a mixing tank and a hydrogenation machine which are sequentially connected along the hydrogen conveying direction; the pressurizing module comprises a pressurizing pump connected between the liquid hydrogen storage tank and the vaporizing module and a hydraulic system for providing power for the pressurizing pump, and hydraulic oil used for pressurizing can be heated through the arrangement of the hydraulic system so as to stably pressurize the pressurizing pump; the vaporization module comprises a heat medium heat exchanger which is arranged in heat exchange with the oil supply pipeline, and the heat medium heat exchanger is arranged between the first reversing valve and the hydraulic pump so as to sequentially utilize the heat of hydraulic oil through the heat medium heat exchanger and the booster pump; a liquid hydrogen pipeline is connected between the booster pump and the mixing tank to convey liquid hydrogen to the mixing tank for mixing with gas hydrogen and cooling. The integrated low-consumption liquid hydrogen station hydrogenation system has the advantages of realizing low-cost arrangement by simplifying pipelines and reducing energy consumption cost and stabilizing hydrogenation.
Description
Technical Field
The invention relates to the field of liquid hydrogen stations, in particular to an integrated low-consumption liquid hydrogen station hydrogenation system.
Background
With the development of technology, more and more hydrogen energy automobiles are coming out, and the hydrogen energy automobiles need to be equipped with hydrogen stations. At present, a liquid hydrogen hydrogenation station mainly adopts a pressurized vaporization system, specifically, liquid hydrogen is pressurized, vaporized and stored firstly, and then stored high-pressure air is pre-cooled and injected into a vehicle. In the hydrogenation process, the liquid hydrogen pressurization can be realized through a liquid drive booster pump, and for the liquid hydrogen, the conventional hydraulic system is difficult to meet the stable pressurization requirement due to the unique low-temperature characteristic of the liquid hydrogen, so that the specific improvement is needed; in addition, in the existing hydrogenation system, due to the hydrogen temperature change in the processes of vaporization, filling and the like, a plurality of heat exchangers are needed to realize hydrogen temperature control in different links, so that the pipeline of the existing hydrogenation system is complex, the energy consumption cost is high, and the cost of setting the hydrogenation system is high, therefore, a hydrogenation system capable of simultaneously solving the problems of the pipeline complexity, the energy consumption cost is high, the hydrogenation stability is poor and the like is needed.
Disclosure of Invention
The invention provides an integrated low-consumption liquid hydrogen station hydrogenation system for overcoming the defects of the prior art, and has the advantages of realizing low-cost arrangement and stable hydrogenation by simplifying pipelines and reducing energy consumption cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
An integrated low-consumption liquid hydrogen station hydrogenation system comprises a liquid hydrogen storage tank, a pressurizing module, a vaporizing module, a hydrogen storage bottle, a mixing tank and a hydrogenation machine which are connected in sequence along a hydrogen conveying direction through a hydrogen conveying pipeline;
The pressurizing module comprises a pressurizing pump connected between the liquid hydrogen storage tank and the vaporizing module and a hydraulic system for providing power for the pressurizing pump, the hydraulic system comprises an oil tank, an oil supply pipeline and a first oil return pipeline are connected between the oil tank and the pressurizing pump, a heater, a hydraulic pump and a first reversing valve which are connected with a controller are sequentially arranged on the oil supply pipeline, the first oil return pipeline also passes through the first reversing valve so as to alternately supply oil to two hydraulic cavities of the pressurizing pump through the first reversing valve, and a plurality of temperature sensors which are connected with the controller are arranged on the oil supply pipeline;
The vaporization module comprises a heat medium heat exchanger which is arranged in heat exchange with hydraulic oil in the oil supply pipeline, and the heat medium heat exchanger is arranged between the first reversing valve and the hydraulic pump;
a liquid hydrogen pipeline is connected between the booster pump and the mixing tank so as to be capable of conveying liquid hydrogen to the mixing tank to be mixed with gas hydrogen for cooling.
Further, the vaporization module further comprises a first natural wind heat exchanger arranged in front of the heat medium heat exchanger.
Further, a second natural wind heat exchanger is further arranged in the oil supply pipeline between the heater and the hydraulic pump, a first exhaust pipe is connected between the second natural wind heat exchanger and the oil tank, and a first exhaust valve is arranged on the first exhaust pipe.
Further, an oil pipe is arranged on an oil supply pipeline between the heater and the hydraulic pump, a second oil return pipeline is further connected between the outlet end of the hydraulic pump and the oil tank, the hydraulic pump is connected with the first oil return pipeline and the second oil return pipeline through a second reversing valve, and the second reversing valve is connected with the controller.
Furthermore, the oil supply pipeline is also provided with a plurality of pressure sensors connected with the controller, a pressure relief pipeline is also connected between the oil supply pipeline and the oil tank, and the pressure relief pipeline is provided with an overflow valve.
Further, a second exhaust pipe is connected between the oil channel of the heat medium heat exchanger and the oil tank, and a second exhaust valve is arranged on the second exhaust pipe.
Further, still include nitrogen gas and sweep the module, nitrogen gas sweeps the module and includes the nitrogen gas jar, the nitrogen gas jar is connected with the main line, be equipped with manual ooff valve on the main line, be connected with a plurality of branch pipelines between main line and the hydrogen delivery pipeline, be equipped with the electromagnetic switch valve that links to each other with the controller on every branch pipeline.
Further, a third reversing valve connected with the controller is arranged on the hydrogen transmission pipeline between the booster pump and the vaporization module, the third reversing valve adopts a three-way two-position reversing valve, and the other output port of the three-way two-position reversing valve is connected with the liquid hydrogen pipeline.
Further, a one-way valve is respectively arranged on the oil supply pipeline, the hydrogen transmission pipeline between the liquid hydrogen storage tank and the pressurizing module, the hydrogen transmission pipeline between the pressurizing pump and the vaporizing module, the hydrogen transmission pipeline between the vaporizing module and the hydrogen storage bottle, and the hydrogen transmission pipeline between the mixing tank and the hydrogenation machine.
Further, a first filter is arranged on the oil supply pipeline, which is close to the hydraulic pump, in front of the hydraulic pump; a second filter is arranged between the mixing tank and the hydrogenation machine.
Further, a hydrogen return pipe is also connected between the booster pump and the liquid hydrogen storage tank.
Further, the tops of the liquid hydrogen storage tank, the booster pump, the heat medium heat exchanger, the hydrogen storage bottle and the mixing tank are respectively connected with a discharge pipe, and a third discharge valve is arranged on the discharge pipe.
The invention adopts the structure and has the advantages that:
1. The hydrogenation system has the advantages of realizing low-cost arrangement and stable hydrogenation by simplifying pipelines and reducing energy consumption cost. Specifically, by integrating the hydraulic system and the vaporization module, the heat of the hydraulic oil can be sequentially utilized to meet the requirements of stable pressurization and vaporization of liquid hydrogen, and pipelines can be simplified to reduce the setting cost; the liquid hydrogen and the gas hydrogen are mixed to cool the gas hydrogen, so that the energy-saving purpose is realized without extra energy consumption, the pipeline is simpler, and the cost is obviously reduced. In summary, the hydrogenation system has higher integration and lower energy consumption cost.
2. The first natural wind heat exchanger and the heat medium heat exchanger are matched, so that the natural wind can be firstly subjected to preliminary vaporization and then is subjected to heat exchange vaporization by using hydraulic oil, and the natural wind is assisted to reduce the energy consumption cost required by hydrogen vaporization; the second natural wind heat exchanger is matched with the heater, so that the energy consumption cost required by heating the hydraulic oil is reduced, and the energy consumption cost of the hydrogenation system is reduced.
3. In the hydraulic system, through the structural cooperation of a heater, an oil viewing pipe, a first oil return pipeline, a second oil return pipeline and the like, the hydraulic oil can be stabilized firstly, circulated and then heated and driven, so that the stability of the liquid hydrogen pressurizing process is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a controller, 2, a liquid hydrogen storage tank, 3, a booster pump, 4, a first natural wind heat exchanger, 5, a heat medium heat exchanger, 6, a hydrogen storage bottle, 7, a mixing tank, 8, a hydrogenation machine, 9, an oil tank, 10, an oil supply pipeline, 11, a first oil return pipeline, 12, a heater, 13, a hydraulic pump, 14, a first reversing valve, 15, a temperature sensor, 16, a liquid hydrogen pipeline, 17, a second natural wind heat exchanger, 18, a first exhaust pipe, 19, an oil viewing pipe, 20, a second oil return pipeline, 21, a second reversing valve, 22, a pressure sensor, 23, a pressure relief pipeline, 24, an overflow valve, 25, a second exhaust pipe, 26, a nitrogen tank, 27, a manual switching valve, 28, an electromagnetic switching valve, 29, a third reversing valve, 30, a one-way valve, 31, a first filter, 32 and a second filter.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, in this embodiment, the hydrogenation system of the integrated low-consumption liquid hydrogen station includes a liquid hydrogen storage tank 2, a pressurizing module, a vaporizing module, a hydrogen storage bottle 2, a mixing tank 6 and a hydrogenation machine 7, which are sequentially connected through a hydrogen transmission pipeline along the hydrogen transmission direction;
The pressurizing module comprises a pressurizing pump 3 connected between the liquid hydrogen storage tank 2 and the vaporizing module, and a hydraulic system for providing power for the pressurizing pump, the hydraulic system comprises an oil tank 9, an oil supply pipeline 10 and a first oil return pipeline 11 are connected between the oil tank 9 and the pressurizing pump 3, a heater 12, a hydraulic pump 13 and a first reversing valve 14 which are connected with the controller 1 are sequentially arranged on the oil supply pipeline 10, the first oil return pipeline 11 also passes through the first reversing valve 14 so as to alternately supply oil to two hydraulic cavities of the pressurizing pump 3 through the first reversing valve 14, and a plurality of temperature sensors 15 connected with the controller 1 are arranged on the oil supply pipeline 10;
the vaporization module comprises a heat medium heat exchanger 5 which is arranged in heat exchange with hydraulic oil in the oil supply pipeline 10, and the heat medium heat exchanger 5 is arranged between a first reversing valve 14 and a hydraulic pump 13;
A liquid hydrogen pipeline 16 is connected between the booster pump 3 and the mixing tank 7 so as to be capable of conveying liquid hydrogen to the mixing tank 7 to be mixed with gas hydrogen for cooling.
When the hydrogenation system is used, liquid hydrogen output by the liquid hydrogen storage tank 2 is pressurized through the booster pump 3 and then conveyed to the direction of the hydrogen storage bottle 6, the liquid hydrogen can be gasified into gas hydrogen through the gasification module in the conveying process, and then the gas hydrogen is stored in the hydrogen storage bottle 6, so that the follow-up hydrogenation with higher efficiency is facilitated due to the advance storage. Along with the extension of the gas hydrogen storage time, the gas hydrogen can be subjected to heat exchange with the external environment to raise the temperature, so that the gas hydrogen needs to be pre-cooled before filling in order to ensure the filling safety and the filling efficiency, specifically, the gas hydrogen is conveyed into the mixing tank 7 from the hydrogen storage bottle 6, and meanwhile, the liquid hydrogen is conveyed into the mixing tank 7 through the liquid hydrogen pipeline to be mixed with the gas hydrogen, wherein the liquid hydrogen can be quickly vaporized, the gas hydrogen can be quickly cooled, so that the gas hydrogen meeting the filling requirement is conveyed to the hydrogenation machine 8, the low-temperature liquid hydrogen characteristic is utilized in the above process, the energy saving purpose is achieved without increasing the additional gas hydrogen cooling energy consumption, the pipeline is simpler, and the cost is obviously reduced. The power of the booster pump 3 is a hydraulic system, the hydraulic system and the vaporization module are integrated together, when the booster pump is used, hydraulic oil is heated to a certain temperature firstly, then the hydraulic oil is subjected to heat exchange through the heat medium heat exchanger 5 for use preferentially, particularly, the hydraulic oil with a certain temperature is vaporized into gas hydrogen by utilizing the heat of the hydraulic oil, and then the booster pump can be used for smoothly boosting the pressure, and due to the low-temperature characteristic of the hydraulic hydrogen, the hydraulic oil can be subjected to heat exchange with the hydraulic hydrogen to a certain extent in the boosting process to cool the hydraulic oil, so that the hydraulic oil can be heated through the heater 12 for recycling after being boosted. The integrated use can simplify the pipeline and improve the system integration level, and is beneficial to reducing the setting cost.
When the hydrogenation system is specifically applied, a person skilled in the art can set valves such as an electromagnetic switch valve, a proportional valve and the like connected with the controller 1 on a hydrogen transmission pipeline among the structures such as the liquid hydrogen storage tank 2, the booster pump 3, the heat medium heat exchanger 5, the hydrogen storage bottle 6, the mixing tank 7, the hydrogenation machine 8 and the like according to actual needs, and detection elements such as a pressure sensor, a temperature sensor and the like. In one embodiment, the vaporization module further includes a first natural wind heat exchanger 4 disposed in front of the heat medium heat exchanger 5, and the first natural wind heat exchanger 4 is configured to exchange heat between liquid hydrogen and external air, and then exchange heat with the heat medium heat exchanger 5, so that vaporization energy consumption of the heat medium heat exchanger 5 is reduced, and further energy consumption cost required by vaporization heat exchange is reduced.
In one embodiment, for an application environment with a relatively high external temperature, the energy consumption cost can be reduced by adopting the following arrangement, specifically, the second natural wind heat exchanger 17 is arranged in the oil supply pipeline 10 between the heater 5 and the hydraulic pump 13, the second natural wind heat exchanger 17 and the heater 12 can be specifically arranged in a matched manner by an electric heater, so that the energy consumption cost is saved. In specific application, a first exhaust pipe 18 is further connected between the second natural wind heat exchanger 17 and the oil tank 9, a first exhaust valve is arranged on the first exhaust pipe 18, and the exhaust operation in the heat exchanger can be performed when the hydraulic oil just begins to circulate.
In one embodiment, the oil supply pipe 10 between the heater 12 and the hydraulic pump 13 is provided with an oil viewing pipe 19, a second oil return pipe 20 is further connected between the outlet end of the hydraulic pump 13 and the oil tank 9, the hydraulic pump 13 is connected with the first oil return pipe 11 and the second oil return pipe 20 through a second reversing valve 21, and the second reversing valve 21 may be a three-way two-position reversing valve specifically, and is connected with the controller 1 to control switching. Wherein look oil pipe 19's setting convenience is observed whether hydraulic oil in the oil circuit is abundant, and second returns oil line 20 setting convenience in time forms closed line oil filling through this pipeline and oil supply pipeline to make things convenient for hydraulic system to circulate first hydraulic oil and then go circulation heat transfer and pressure boost again when starting, so do benefit to the stability that improves the pressure boost process.
In one embodiment, the oil supply pipeline 10 is further provided with a plurality of pressure sensors 22 connected with the controller 1, a pressure relief pipeline 23 is further connected between the oil supply pipeline 10 and the oil tank 9, and an overflow valve 24 is arranged on the pressure relief pipeline 23 to timely relieve pressure to ensure operation safety when the pressure of hydraulic oil in the pipeline is too high.
In one embodiment, a second exhaust pipe 25 is connected between the oil channel of the heat medium heat exchanger 5 and the oil tank 9, and a second exhaust valve is disposed on the second exhaust pipe 25, and is used during the initial operation of the hydraulic oil to exhaust the air in the heat exchanger.
In one embodiment, in order to empty the air in the pipeline before the system is started and empty the hydrogen in the pipeline during maintenance, the hydrogenation system further comprises a nitrogen purging module, the nitrogen purging module comprises a nitrogen tank 26, the nitrogen tank 26 is connected with a main pipeline, the main pipeline is provided with a manual switch valve 27, a plurality of branch pipelines are connected between the main pipeline and the hydrogen conveying pipeline, and each branch pipeline is provided with an electromagnetic switch valve 28 connected with the controller 1. Wherein, the manual switch valve 27 is arranged to ensure the sealing of the nitrogen tank by manual closing before the arrangement of the branch pipe, and after the arrangement of the branch pipe, the manual switch valve 27 can be in a normally open state, and the electromagnetic switch valve 28 on the branch pipe is used for controlling whether the nitrogen in the nitrogen tank 26 is output or not.
In one embodiment, a third reversing valve 29 connected with the controller 1 is arranged on the hydrogen transmission pipeline between the booster pump 3 and the vaporization module, and in one embodiment, the third reversing valve 29 adopts a three-way two-position reversing valve, and the other output port of the three-way two-position reversing valve is connected with the liquid hydrogen pipeline 16.
In one embodiment, a check valve 30 is disposed on the oil supply pipeline 10 of the hydraulic pump 13, the hydrogen transmission pipeline between the liquid hydrogen storage tank 2 and the pressurizing module, the hydrogen transmission pipeline between the pressurizing pump 3 and the vaporizing module, the hydrogen transmission pipeline between the vaporizing module and the hydrogen storage bottle 6, and the hydrogen transmission pipeline between the mixing tank 7 and the hydrogenation machine 8, so as to avoid backflow of fluid.
In one embodiment, a first filter 31 is arranged on the oil supply pipeline of the hydraulic pump 13 near the hydraulic pump; a second filter 32 is arranged between the mixing tank 7 and the hydrogenation machine 8, and the filter can filter impurities and the like.
In one embodiment, a hydrogen return pipe is also connected between the booster pump and the liquid hydrogen storage tank. Because the booster pump inevitably has heat exchange with the outside, a little liquid hydrogen vaporization phenomenon can appear, in order to avoid hydrogen waste, the gas hydrogen reflux pipe can be connected between the booster pump exhaust airway and the liquid hydrogen storage tank, so that the vaporized hydrogen flows back into the liquid hydrogen storage tank again, and the hydrogen is liquefied for recycling under low-temperature liquid hydrogen.
In one embodiment, the tops of the liquid hydrogen storage tank, the booster pump, the heat medium heat exchanger, the hydrogen storage bottle and the mixing tank are respectively connected with a discharge pipe, and a third discharge valve is arranged on the discharge pipe and can be used for pressure relief when the pipeline pressure is too high or fluid discharge when overhauling.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and are intended to fall within the scope of the invention. The present invention is not described in detail in the following, but is well known to those skilled in the art.
Claims (5)
1. The integrated low-consumption liquid hydrogen station hydrogenation system is characterized by comprising a liquid hydrogen storage tank, a pressurizing module, a vaporization module, a hydrogen storage bottle, a mixing tank and a hydrogenation machine which are connected in sequence along a hydrogen conveying direction through a hydrogen conveying pipeline;
The pressurizing module comprises a pressurizing pump connected between the liquid hydrogen storage tank and the vaporizing module and a hydraulic system for providing power for the pressurizing pump, the hydraulic system comprises an oil tank, an oil supply pipeline and a first oil return pipeline are connected between the oil tank and the pressurizing pump, a heater, a hydraulic pump and a first reversing valve which are connected with a controller are sequentially arranged on the oil supply pipeline, the first oil return pipeline also passes through the first reversing valve so as to alternately supply oil to two hydraulic cavities of the pressurizing pump through the first reversing valve, and a plurality of temperature sensors which are connected with the controller are arranged in the oil supply pipeline;
The vaporization module comprises a heat medium heat exchanger which is arranged in heat exchange with hydraulic oil in the oil supply pipeline, and the heat medium heat exchanger is arranged between the first reversing valve and the hydraulic pump; a liquid hydrogen pipeline is connected between the booster pump and the mixing tank so as to be capable of conveying liquid hydrogen to the mixing tank to be mixed with gas hydrogen for cooling;
The vaporization module further comprises a first natural wind heat exchanger arranged in front of the heat medium heat exchanger, and a second natural wind heat exchanger is arranged in the oil supply pipeline between the heater and the hydraulic pump; a first exhaust pipe is connected between the second natural wind heat exchanger and the oil tank, and a first exhaust valve is arranged on the first exhaust pipe; an oil supply pipeline between the heater and the hydraulic pump is provided with an oil viewing pipe, a second oil return pipeline is also connected between the outlet end of the hydraulic pump and the oil tank, the hydraulic pump is connected with the first oil return pipeline and the second oil return pipeline through a second reversing valve, and the second reversing valve is connected with the controller; the oil supply pipeline is also provided with a plurality of pressure sensors connected with the controller, a pressure relief pipeline is also connected between the oil supply pipeline and the oil tank, and the pressure relief pipeline is provided with an overflow valve; a second exhaust pipe is connected between the oil channel of the heat medium heat exchanger and the oil tank, and a second exhaust valve is arranged on the second exhaust pipe.
2. The integrated low-consumption liquid hydrogen station hydrogenation system according to claim 1, further comprising a nitrogen purging module, wherein the nitrogen purging module comprises a nitrogen tank, the nitrogen tank is connected with a main pipeline, a manual switch valve is arranged on the main pipeline, a plurality of branch pipelines are connected between the main pipeline and the hydrogen conveying pipeline, and an electromagnetic switch valve connected with a controller is arranged on each branch pipeline.
3. The integrated low-consumption liquid hydrogen station hydrogenation system according to claim 1, wherein a third reversing valve connected with the controller is arranged on a hydrogen transmission pipeline between the booster pump and the vaporization module, the third reversing valve adopts a three-way two-position reversing valve, and the other output port of the three-way two-position reversing valve is connected with the liquid hydrogen pipeline.
4. The integrated low-consumption liquid hydrogen station hydrogenation system according to claim 1, wherein a one-way valve is respectively arranged on a fuel supply pipeline close to the hydraulic pump before the hydraulic pump, a hydrogen transmission pipeline between the liquid hydrogen storage tank and the pressurizing module, a hydrogen transmission pipeline between the pressurizing pump and the vaporizing module, a hydrogen transmission pipeline between the vaporizing module and the hydrogen storage bottle, and a hydrogen transmission pipeline between the mixing tank and the hydrogenation machine.
5. The integrated low-consumption liquid hydrogen station hydrogenation system according to claim 1, wherein a first filter is arranged on the oil supply pipeline which is close to the hydraulic pump before the hydraulic pump; a second filter is arranged between the mixing tank and the hydrogenation machine.
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| CN202311722865.4A CN117646869B (en) | 2023-12-13 | 2023-12-13 | Integrated low-consumption liquid hydrogen station hydrogenation system |
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| CN202311722865.4A CN117646869B (en) | 2023-12-13 | 2023-12-13 | Integrated low-consumption liquid hydrogen station hydrogenation system |
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| CN117646869A (en) | 2024-03-05 |
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