WO2021248898A1 - Système de production et de stockage d'hydrogène sur la base d'une énergie renouvelable et son procédé de commande - Google Patents

Système de production et de stockage d'hydrogène sur la base d'une énergie renouvelable et son procédé de commande Download PDF

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WO2021248898A1
WO2021248898A1 PCT/CN2020/142049 CN2020142049W WO2021248898A1 WO 2021248898 A1 WO2021248898 A1 WO 2021248898A1 CN 2020142049 W CN2020142049 W CN 2020142049W WO 2021248898 A1 WO2021248898 A1 WO 2021248898A1
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subsystem
hydrogen production
water
heat exchanger
organic matter
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PCT/CN2020/142049
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English (en)
Chinese (zh)
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李建伟
刘永浩
张艳
王建
郭亮
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阳光电源股份有限公司
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
    • C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
    • C01B3/0015—Organic compounds; Solutions thereof
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0022—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for chemical reactors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

Definitions

  • the invention belongs to the technical field of hydrogen production from renewable energy sources, and in particular relates to a hydrogen production and hydrogen storage system from renewable energy sources and a control method thereof.
  • renewable and sustainable energy sources represented by photovoltaic power generation have developed rapidly, but the intermittent and unpredictable nature of renewable energy power generation has become a huge obstacle to achieving large-scale integration into the main grid.
  • hydrogen is an excellent energy storage medium, which can convert solar energy with strong fluctuation characteristics into hydrogen energy, which is more conducive to storage and transportation.
  • the purpose of the present invention is to provide a renewable energy hydrogen production and storage system and its control method to solve the heat utilization defects of the hydrogen production and storage system in this case.
  • the specific technical solutions are as follows:
  • the present invention provides a renewable energy hydrogen production and hydrogen storage system, including: a renewable energy power generation subsystem, a water electrolysis hydrogen production subsystem, a heat tracing subsystem, and an organic hydrogen storage subsystem;
  • the renewable energy power generation subsystem is connected to the water electrolysis hydrogen production subsystem;
  • the hydrogen output end of the water electrolysis hydrogen production subsystem is connected to the organic hydrogen storage subsystem;
  • the heat tracing subsystem is connected between the organic hydrogen storage subsystem and the water electrolysis hydrogen production subsystem, and transfers the heat of the hydrogenated organic matter generated by the organic hydrogen storage subsystem to the water electrolysis hydrogen production Subsystem.
  • the heat tracing subsystem includes: a first heat exchanger, a hot water pump, a hot water tank, and a first flow control valve;
  • the water inlet of the first heat exchanger is connected to the hot water pump via the first flow control valve, and the water outlet of the first heat exchanger is connected to the water electrolysis hydrogen production device in the water electrolysis hydrogen production system
  • the water inlet of the hot water pump is connected to the water outlet of the hot water tank, and the water inlet of the hot water tank is connected to the heat exchange water outlet of the water electrolysis hydrogen production device.
  • the organic hydrogen storage subsystem includes: a hydrogenation reactor, a second heat exchanger, a cooling device, a first temperature controller, a second temperature controller, a second flow control valve, and a third flow control valve And hydrogenated organic matter storage tanks;
  • Part of the hydrogenated organic matter generated by the hydrogenation reactor enters the second heat exchanger after passing through the first heat exchanger, and the remaining part of the hydrogenated organic matter directly enters the second heat exchanger ;
  • the second flow control valve is arranged on the branch connecting the hydrogenation reactor and the second heat exchanger;
  • the first temperature controller is arranged at the water outlet of the first heat exchanger, detects the temperature of the outlet water of the first heat exchanger, and controls the opening of the second flow control valve according to the detected temperature, So that the temperature of the hot water in the heating subsystem is maintained within the first preset temperature range;
  • the water inlet of the second heat exchanger is connected to the water outlet of the cooling device via the third flow control valve, and the water outlet of the second heat exchanger is connected to the water inlet of the cooling device;
  • the second temperature controller is arranged at the hydrogenated organic matter output end of the second heat exchanger, detects the temperature of the hydrogenated organic matter output by the second heat exchanger, and controls it according to the detected temperature of the hydrogenated organic matter The opening degree of the third flow control valve to maintain the hydrogenated organic matter within a second preset temperature range;
  • the hydrogenated organic matter output end of the second heat exchanger is connected to the hydrogenated organic matter storage tank.
  • the organic hydrogen storage subsystem further includes: a dehydrogenated organic matter storage tank;
  • the dehydrogenated organic matter storage tank stores dehydrogenated organic matter, which is used to transport the dehydrogenated organic matter to the hydrogenation reactor.
  • the renewable energy power generation subsystem includes a photovoltaic power generation device and a DC/DC converter;
  • the electrical energy output end of the photovoltaic power generation device is connected to the input end of the DC/DC converter, and the output end of the DC/DC converter is connected to the water electrolysis hydrogen production device in the water electrolysis hydrogen production subsystem.
  • the renewable energy power generation subsystem includes a wind power generation device, an AC/DC converter, and a DC/DC converter
  • the water electrolysis hydrogen production subsystem includes a third temperature controller
  • the electric energy output end of the wind power generation device is connected to the output end of the AC/DC converter, the output end of the AC/DC converter is connected to the input end of the DC/DC converter, and the DC/DC The output end of the converter is connected to the water electrolysis hydrogen production device in the water electrolysis hydrogen production subsystem;
  • the third temperature controller is arranged on the water electrolysis hydrogen production device, and is used to detect the temperature of the water electrolysis hydrogen production device, and when the detected temperature is lower than a preset temperature, control the heating element
  • the system works to heat the water electrolysis hydrogen production device.
  • the present invention also provides a method for controlling hydrogen production and hydrogen storage from renewable energy, which is applied to the hydrogen production and hydrogen storage system from renewable energy as described in any one of the possible implementation modes of the first aspect.
  • the methods include:
  • each device in the heat tracing subsystem works to transfer the heat generated when the organic hydrogen storage subsystem generates hydrogenated organic matter to the water electrolysis hydrogen production device, In order to maintain the temperature of the water electrolysis hydrogen production device within the preset temperature range.
  • the heat tracing subsystem includes: a first heat exchanger, a hot water pump, a hot water tank, and a first flow control valve;
  • each device in the heat tracing subsystem works to transfer the heat generated when the organic hydrogen storage subsystem generates hydrogenated organic matter to the water electrolysis hydrogen production Devices, including:
  • the hot water pump delivers the cooling water in the hot water tank to the first heat exchanger, so that the cooling water and the hydrogenated organic matter passing through the first heat exchanger undergo heat exchange change. For accompanying hot water;
  • the first heat exchanger delivers the hot water to the water electrolysis hydrogen production device, so that the hot water and the water electrolysis hydrogen production device perform heat exchange to obtain cooling water, and the regained cooling Water is delivered to the hot water tank;
  • the first flow control valve is used to control the amount of cooling water delivered to the first heat exchanger.
  • the organic hydrogen storage subsystem includes a first temperature controller and a second flow control valve
  • the first temperature controller detects the temperature of the outlet water of the first heat exchanger, and controls the opening of the second flow control valve according to the detected temperature, and adjusts the hydrogenated organic matter passing through the first heat exchanger To maintain the temperature of the hot water in the heating subsystem within the first preset temperature range.
  • the organic hydrogen storage subsystem further includes: a second heat exchanger, a second temperature controller, and a third flow control valve;
  • the second temperature controller detects the temperature of the hydrogenated organic matter after cooling through the second heat exchanger, and controls the opening of the third flow control valve according to the detected temperature, and adjusts the entry into the second heat exchanger.
  • the amount of cooling water of the heat exchanger is used to maintain the temperature of the hydrogenated organic matter within the second preset temperature range.
  • the renewable energy power generation subsystem includes a wind power generation device, an AC/DC converter, and a DC/DC converter
  • the water electrolysis hydrogen production subsystem includes a third temperature controller
  • the method further includes:
  • the third temperature controller detects the temperature of the water electrolysis hydrogen production device, and when the detected temperature is lower than the preset temperature, controls the heating subsystem to work to heat the water electrolysis hydrogen production device.
  • the organic hydrogen storage subsystem further includes a dehydrogenated organic matter storage tank
  • the dehydrogenated organic matter storage tank is used to store dehydrogenated organic matter and transport the dehydrogenated organic matter to the hydrogenation reactor.
  • the renewable energy hydrogen production and hydrogen storage system includes a renewable energy power generation subsystem, a water electrolysis hydrogen production subsystem, a heat tracing subsystem, and an organic hydrogen storage subsystem.
  • the heat tracing subsystem is connected to the organic hydrogen storage subsystem.
  • At least part of the heat generated when the organic hydrogen storage subsystem generates hydrogenated organic matter is transferred to the water electrolysis hydrogen production subsystem to heat the water electrolysis hydrogen production device through the heat tracing subsystem .
  • This solution uses the heat generated when hydrogen is added to the organic matter to heat the water electrolysis hydrogen production device to ensure that the liquid in it will not freeze or crystallize in the cold season.
  • Figure 1 is a schematic structural diagram of a renewable energy hydrogen production and hydrogen storage system provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another renewable energy hydrogen production and hydrogen storage system provided by an embodiment of the present invention.
  • Fig. 3 is a schematic structural diagram of yet another renewable energy hydrogen production and hydrogen storage system provided by an embodiment of the present invention.
  • FIG. 1 shows a schematic structural diagram of a renewable energy hydrogen production and hydrogen storage system provided by an embodiment of the present invention.
  • the system includes a renewable energy power generation subsystem 100, a water electrolysis hydrogen production subsystem 200, and a heat tracing system.
  • Subsystem 300 and Organic Hydrogen Storage Subsystem 400 are also included in the system.
  • the renewable energy power generation subsystem 100 is used to convert renewable energy into electric energy and provide the obtained electric energy to the water electrolysis hydrogen production subsystem 200.
  • the renewable energy power generation subsystem 100 mainly includes a renewable energy power generation device 101 and an inverter 102.
  • the renewable energy power generation device 101 may be a photovoltaic power generation device, a wind power generation device, or the like.
  • the converter 102 is used to convert the voltage output by the renewable energy power generation device 101-and then provide working power for the water electrolysis hydrogen production subsystem 200.
  • the water electrolysis hydrogen production subsystem 200 is used to electrolyze water to obtain hydrogen and oxygen, and transport the hydrogen to the organic hydrogen storage subsystem 400.
  • the water electrolysis hydrogen production subsystem 200 mainly includes a water electrolysis hydrogen production device 201, a hydrogen storage tank 202, and an oxygen storage tank 203.
  • the water electrolysis hydrogen production device 201 can be an electrolytic cell, used to electrolyze water to obtain hydrogen and oxygen, and transport the hydrogen to the hydrogen storage tank 202 for storage, so as to provide the hydrogen to the subsequent subsystem; at the same time, the oxygen is delivered to It is stored in the oxygen storage tank 203, and the oxygen in the oxygen storage tank 203 can be directly provided to oxygen users.
  • the organic hydrogen storage subsystem 400 is used for reacting hydrogen with organics to obtain hydrogenated organics, that is, storing the hydrogen obtained by the water electrolysis hydrogen production subsystem 200 in an organic hydrogen storage medium.
  • the organic hydrogen storage medium includes, but is not limited to, organic unsaturated compounds such as alkenes, alkynes, or aromatic hydrocarbons.
  • organic matter After storing hydrogen in an organic hydrogen storage medium, it is convenient for subsequent storage and transportation of hydrogen. Moreover, organic matter has a high hydrogen storage density, which reduces the transportation cost of hydrogen compared with high-pressure gas transportation.
  • the heating subsystem 300 is connected between the water electrolysis hydrogen production subsystem 200 and the organic hydrogen storage subsystem 400.
  • the heat tracing subsystem 300 is mainly used to transfer part of the heat generated when the organic hydrogen storage subsystem 400 generates reaction products to the water electrolysis hydrogen production subsystem 200, thereby increasing the temperature of the water electrolysis hydrogen production device.
  • the low temperature of the external environment in the winter in northern my country may cause the wading equipment (e.g., electrolyzer) in the water electrolysis hydrogen production subsystem 200 and the liquid (e.g., electrolyte and water, etc.) in the pipeline to freeze and condense. crystallization.
  • the organic hydrogen storage subsystem 400 adds hydrogen to the organic hydrogen storage medium to perform a chemical reaction, a large amount of heat is generated when the reaction product is generated.
  • the function of the heat tracing subsystem 300 is to use the heat generated by the organic hydrogen storage subsystem 400 to heat the relevant equipment in the water electrolysis hydrogen production subsystem 200 so as to maintain the relevant equipment in the subsystem at a certain temperature.
  • renewable energy as light energy as an example, such as photovoltaic off-grid hydrogen production, to illustrate the control process of the system:
  • the photovoltaic off-grid power generation subsystem generates electricity, and the output electric energy is provided to the water electrolysis hydrogen production subsystem 200 to electrolyze water to produce hydrogen.
  • the generated hydrogen is first stored in the hydrogen storage tank 202 and partly delivered to the organic hydrogen storage subsystem 400.
  • the organic hydrogen storage subsystem 400 the hydrogen gas and the organic hydrogen storage medium undergo a chemical reaction to generate reaction products while generating a large amount of heat. At this time, the heat is taken away by the cooling water. Part of the hydrogen continues to be stored in the hydrogen storage tank 202.
  • the photovoltaic off-grid power generation subsystem does not work, so the water electrolysis hydrogen production subsystem also stops working at night, and the temperature of the electrolyte and water system drops. Especially at night in winter, the electrolyte and water may crystallize and freeze. , Which leads to accidents.
  • the hydrogen stored in the hydrogen storage tank 202 continues to be transported to the organic hydrogen storage subsystem 400 for chemical reaction with the organic hydrogen storage medium to generate reaction products while generating a large amount of heat, which is transferred by the heat tracing subsystem
  • the water electrolysis hydrogen production device in the water electrolysis hydrogen production sub-system 200 is heated, so that the electrolyte and water in the water electrolysis hydrogen production sub-system are maintained within a certain temperature range to avoid freezing and crystallization.
  • the water electrolysis hydrogen production subsystem is turned on again, it can be quickly started, reducing the startup time and energy consumption, thereby increasing the hydrogen production efficiency of the water electrolysis hydrogen production subsystem.
  • using the heat generated by the organic hydrogen storage subsystem to heat the water electrolysis hydrogen production device can also reduce the temperature of the reaction product, thereby reducing the amount of cooling medium used for cooling the reaction product, that is, reducing the amount of cooling water.
  • the renewable energy hydrogen production and hydrogen storage system includes a renewable energy power generation subsystem, a water electrolysis hydrogen production subsystem, a heat tracing subsystem, and an organic hydrogen storage subsystem.
  • the heat tracing subsystem is connected to the organic hydrogen storage subsystem. Between the hydrogen subsystem and the water electrolysis hydrogen production subsystem, part of the heat generated when the organic hydrogen storage subsystem generates hydrogenated organic matter is transferred to the water electrolysis hydrogen production subsystem to heat the water electrolysis hydrogen production device through the heat tracing subsystem.
  • This solution uses the heat generated when hydrogen is added to the organic hydrogen storage medium to heat the water electrolysis hydrogen production device to ensure that the liquid in it will not freeze or crystallize in the cold season.
  • the next startup time is reduced, that is, the production efficiency of the water electrolysis hydrogen production device is improved.
  • the amount of cooling water required by the organic hydrogen storage subsystem to cool the hydrogenated organic matter is reduced, and the energy utilization rate of the system is improved.
  • FIG. 2 shows a schematic structural diagram of another renewable energy hydrogen production and hydrogen storage system provided by an embodiment of the present invention. This embodiment will introduce the working process of the heat tracing subsystem in detail.
  • the heat tracing subsystem 300 mainly includes: a first heat exchanger 301, a hot water pump 302, a hot water tank 303 and a first flow control valve 304.
  • the water inlet of the first heat exchanger 301 is connected to one end of the first flow control valve 304, the other end of the first flow control valve 304 is connected to the water outlet of the hot water pump 302, and the water inlet of the hot water pump 302 is connected to the hot water tank 303
  • the water inlet of the hot water tank 303 is connected to the heat exchange water outlet of the water electrolysis hydrogen production device 201, and the heat exchange water inlet of the water electrolysis hydrogen production device 201 is connected to the water outlet of the first heat exchanger 301.
  • the first heat exchanger 301 uses the input cooling water and the organic hydrogen storage subsystem 400 to generate reaction products for heat exchange, so that the cooling water absorbs heat into hot water, that is, hot water; then, the first heat exchanger 301 will be accompanied by
  • the hot water is sent to the low-temperature electrolyte and water system in the water electrolysis hydrogen production device 201 for heat exchange and becomes cooling water (ie, heat-tracing return water), and the heat-tracing return water flows into the hot water tank 303.
  • the hot water pump 302 transports the cooling water in the hot water tank 303 to the first heat exchanger 301 again, so that the cooling water circulation process of the heating subsystem is completed.
  • the first flow control valve 304 is used to control the amount of cooling water entering the first heat exchanger 301, thereby controlling the heat exchange speed of the first heat exchanger 301, thereby adjusting the temperature of the hot water, and maintaining the hot water pump 302 Stable operation.
  • the organic hydrogen storage subsystem 400 Under normal circumstances, the organic hydrogen storage subsystem 400 generates more heat generated by the reactants, and the water electrolysis hydrogen production device 201 is not enough to consume it. In this case, in order to ensure the stability of the temperature of the final reaction product, hydrogen is stored in the organic matter.
  • a second heat exchanger is provided in the subsystem 400 for controlling the temperature of the reaction product.
  • it is necessary to control the flow rate of the hydrogenated organic matter flowing through the first heat exchanger 301 that is, to control the amount of heat involved in the heat exchange in the first heat exchanger 301, so as to maintain the heat tracing. The temperature of the water.
  • the organic hydrogen storage subsystem 400 mainly includes: a hydrogenation reactor 401, a second heat exchanger 402, a cooling device 403, a second temperature controller 404, a third flow control valve 405, and a hydrogenation organic storage Tank 406, first temperature controller 407, and second flow control valve 408.
  • the second flow control valve 408 is used to control the flow rate of the hydrogenated organic matter flowing through the cross-line parallel to the first heat exchanger 301, so as to realize the control of the hydrogenated organic matter flowing through the first heat exchanger 301. flow.
  • the hydrogenation reactor 401 is used for chemically reacting hydrogen with an organic hydrogen storage medium to generate a corresponding reaction product, that is, a hydrogenated organic substance.
  • the first temperature controller 407 is arranged at the water outlet of the first heat exchanger 301, and the second flow control valve 408 is arranged on the cross-line connecting the hydrogenation reactor 401 and the second heat exchanger 302.
  • the first temperature controller 407 is used to detect the water temperature of the water outlet of the first heat exchanger 301, and control the opening of the second flow control valve 408 according to the measured water temperature, so as to adjust the reaction entering the first heat exchanger 301
  • the product flow rate is to control the amount of reaction products that participate in the heat exchange process of the first heat exchanger 301, that is, to control the amount of heat that participates in the heat exchange of the first heat exchanger 301, and finally the temperature of the hot water is maintained at the first Within the preset temperature range.
  • the temperature of the hot water can be flexibly controlled through the first temperature controller and the second flow control valve.
  • the second heat exchanger 402 is provided between the first heat exchanger 301 and the hydrogenated organic substance storage tank 406.
  • Part of the reaction product passes through the first heat exchanger 301 and then enters the second heat exchanger 402, and the remaining reaction product directly enters the second heat exchanger 402. That is, a part of the reaction product passes through the first heat exchanger 301 and the second heat exchanger 402 for heat exchange; another part of the reaction product only passes through the second heat exchanger 402 for heat exchange.
  • the flow rates of the reaction products of the two branches are controlled by adjusting the opening degree of the second flow control valve 408.
  • the water inlet of the second heat exchanger 402 is connected to the water outlet of the cooling device 403 via the third flow control valve 405, and the water outlet of the second heat exchanger 402 is connected to the water inlet of the cooling device 403.
  • the cooling device 403 provides cooling water for the second heat exchanger 402, and the cooling water exchanges heat with the reaction product passing through the second heat exchanger 402 to reduce the temperature of the reaction product.
  • the water flows back to the cooling device 403 for cooling and then is supplied to the second heat exchanger 402 again.
  • the amount of cooling water entering the second heat exchanger 402 is controlled by the third flow control valve 405.
  • the opening of the third flow control valve 405 is controlled to maintain the final temperature of the reaction product at the second preset temperature Within range.
  • the hydrogenated organic matter output from the second heat exchanger 402 is transported to the hydrogenated organic matter storage tank 406 for storage, so as to be transported to the location of the hydrogen user.
  • the system further includes a dehydrogenation device 500.
  • the dehydrogenation device 500 After the reaction product output by the organic hydrogen storage subsystem 400 is transported to the hydrogen user, the dehydrogenation device 500 is used to perform dehydrogenation, that is, hydrogen is separated from the reaction product to be used by the hydrogen user.
  • the organic matter after dehydrogenation can be transported to the organic hydrogen storage subsystem 400 as an organic hydrogen storage medium again.
  • the renewable energy hydrogen production and hydrogen storage system uses the first heat exchanger to transfer part of the heat generated by the organic hydrogen storage subsystem to the water electrolysis hydrogen production subsystem to heat the water electrolysis hydrogen production device to avoid it The liquid inside crystallizes and freezes.
  • the second heat exchanger is used to stabilize the temperature of the hydrogenated organic matter output from the organic matter hydrogen storage subsystem.
  • the first temperature controller and the second flow control valve are used to control the temperature of the hot water in the heating subsystem to stabilize within a certain range. The use of this system can effectively use the heat inside the system and improve the energy utilization rate.
  • FIG. 3 shows a schematic structural diagram of yet another renewable energy hydrogen production and hydrogen storage system provided by the present invention. This embodiment is applied to a wind power generation application scenario.
  • the difference from the embodiment shown in FIG. 2 is that no matter whether it is day or night, as long as the wind power generation device can generate electricity, the water electrolysis hydrogen production subsystem can work, that is, no heat preservation is required.
  • the photovoltaic power generation device can only generate electricity during the day and cannot generate electricity at night. Therefore, in the application scenario of wind power generation, the working state of the heating subsystem cannot be controlled during the day or night.
  • the water electrolysis hydrogen production device 201 in the water electrolysis hydrogen production subsystem 200 is also provided with a third temperature controller 204.
  • the third temperature controller 204 detects the temperature of the electrolyte in the water electrolysis hydrogen production device 201 and the water in the water system, and when the detected temperature is lower than the preset temperature, it controls the heating subsystem 300 to work and causes the water to electrolyze The electrolyte and water in the hydrogen production subsystem are maintained within a certain temperature range; if the detected temperature is higher than the preset low temperature range, the heating subsystem 300 is not required to work.
  • the third temperature controller 204 is specifically used to control the operation of the hot water pump 302 in the heat tracing subsystem 300, so as to deliver cooling water to the first heat exchanger 301, and the first heat exchanger 301
  • the outputted hot water is supplied to the water electrolysis hydrogen production device 301 to realize heating for the water electrolysis hydrogen production device 201.
  • the working principles of the water electrolysis hydrogen production sub-system 200, the heat tracing sub-system 300 and the organic hydrogen storage sub-system 400 are the same as the working process of the foregoing embodiment, and will not be repeated here.
  • the renewable energy hydrogen production and hydrogen storage system provided in this embodiment is applied to wind power generation application scenarios.
  • the water electrolysis hydrogen production subsystem is provided with a temperature controller for detecting the electrolyte and the electrolyte in the water electrolysis hydrogen production subsystem. The temperature of the water, and the working status of the heating subsystem is controlled according to the detected temperature.
  • the heat tracing subsystem When the temperature of the electrolyte and water is lower than the preset temperature, the heat tracing subsystem is controlled to work, and the heat tracing subsystem transfers the heat generated by the organic hydrogen storage subsystem to the water electrolysis hydrogen production subsystem, which can avoid water
  • the liquid crystallization and freezing in the electrolysis hydrogen production subsystem can also reduce the amount of cooling water required for the organic hydrogen storage subsystem to cool the hydrogenated organic matter, thereby improving the energy utilization rate.
  • modules and sub-modules in the devices and terminals in the embodiments of the present application can be combined, divided, and deleted according to actual needs.
  • the disclosed terminal, device, and method may be implemented in other ways.
  • the terminal embodiments described above are merely illustrative, for example, the division of modules or sub-modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple sub-modules or modules may be combined. Or it can be integrated into another module, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.
  • modules or sub-modules described as separate components may or may not be physically separate, and the components as modules or sub-modules may or may not be physical modules or sub-modules, that is, they may be located in one place or distributed to Multiple network modules or sub-modules. Some or all of the modules or sub-modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional modules or sub-modules in the various embodiments of the present application may be integrated into one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated in In one module.
  • the above-mentioned integrated modules or sub-modules can be implemented in the form of hardware or software function modules or sub-modules.

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  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

La présente invention concerne un système de production et de stockage d'hydrogène sur la base d'une énergie renouvelable et son procédé de commande. Le système comprend un sous-système de génération de courant au moyen d'une énergie renouvelable, un sous-système de production d'hydrogène par électrolyse d'eau, un sous-système de traçage thermique et un sous-système de stockage d'hydrogène de matière organique. Le sous-système de traçage thermique est raccordé entre le sous-système de stockage d'hydrogène de matière organique et le sous-système de production d'hydrogène par électrolyse d'eau. Une partie de la chaleur générée lorsque le sous-système de stockage d'hydrogène de matière organique génère une matière organique hydrogénée est transférée au sous-système de production d'hydrogène par électrolyse d'eau au moyen du sous-système de traçage thermique de façon à chauffer un dispositif de production d'hydrogène par électrolyse d'eau. D'après la solution, le dispositif de production d'hydrogène par électrolyse d'eau est chauffé en utilisant la chaleur générée par la réaction de l'hydrogène et d'une matière organique, de sorte qu'un liquide dans le dispositif de production d'hydrogène par électrolyse d'eau ne peut ni geler ni cristalliser à la saison froide. De plus, le temps de démarrage ultérieur est raccourci, la sécurité du système assurée et l'efficacité de production du dispositif de production d'hydrogène par électrolyse d'eau améliorée. En outre, une partie de la chaleur de la matière organique hydrogénée est utilisée pour chauffer le dispositif de production d'hydrogène par électrolyse d'eau. La consommation d'eau de refroidissement requise pour refroidir la matière organique hydrogénée s'en trouve réduite et le taux d'utilisation de l'énergie du système amélioré.
PCT/CN2020/142049 2020-06-08 2020-12-31 Système de production et de stockage d'hydrogène sur la base d'une énergie renouvelable et son procédé de commande WO2021248898A1 (fr)

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