CN114738662A - Renewable energy comprehensive utilization system and method based on liquid hydrogen energy storage - Google Patents
Renewable energy comprehensive utilization system and method based on liquid hydrogen energy storage Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
- F17C5/04—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases requiring the use of refrigeration, e.g. filling with helium or hydrogen
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
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- 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
Abstract
The invention provides a system and a method for comprehensively utilizing renewable energy sources based on liquid hydrogen energy storage, wherein the system comprises: the electrolytic hydrogen production device is connected with the renewable energy power supply device, and the renewable energy power supply device provides electric energy for the electrolytic hydrogen production device to carry out electrolytic hydrogen production; the hydrogen liquefying device is connected with a hydrogen output pipeline of the electrolytic hydrogen production device and is used for liquefying hydrogen; the liquid hydrogen storage device is connected with the liquid hydrogen output end of the hydrogen liquefying device and is used for storing liquid hydrogen; and the liquid hydrogen gasification device is connected with the output end of the liquid hydrogen storage device and is used for gasifying the liquid hydrogen. According to the renewable energy comprehensive utilization system based on liquid hydrogen energy storage, the electric energy provided by the renewable energy power supply device is utilized to electrolyze and produce hydrogen, the hydrogen is liquefied by the hydrogen liquefying device, and the hydrogen is liquefied and stored, so that the energy storage density of unit volume is improved, and the transportation is facilitated.
Description
Technical Field
The invention relates to the technical field of renewable energy storage, in particular to a system and a method for comprehensively utilizing renewable energy based on liquid hydrogen energy storage.
Background
Renewable energy sources (wind power generation, photovoltaic power generation, hydroelectric power generation and the like) are influenced by external factors such as geographical positions, weather or meteorological conditions, time and the like, and the defects of instability, intermittence and the like exist in power supply. In order to improve the power supply quantity and reliability of renewable energy sources, a certain energy storage system needs to be configured in a power grid so as to match with the renewable energy sources to realize peak shaving and improve the quality of power supply.
The prior art discloses an integrated system and a method for comprehensively utilizing offshore energy to generate power and store hydrogen energy, which comprehensively utilize various offshore renewable energy sources, store surplus electric energy by electrolyzing water by taking hydrogen energy storage as an energy storage link, supply power to a load when the offshore energy sources are insufficient to generate power, and do not need an additional energy storage device. The prior art also discloses a distributed photovoltaic power generation hydrogen energy storage system and a distributed photovoltaic power generation hydrogen energy storage method, excess electric energy generated in the daytime is introduced into an electrolytic cell to electrolyze water to produce hydrogen by taking the hydrogen as a hydrogen energy storage unit, the hydrogen is temporarily stored in a hydrogen storage material with high adsorbability, and the hydrogen storage material releases the hydrogen and is introduced into a hydrogen fuel cell to generate power when power is used at night, so that the electric energy is converted into chemical energy and then is converted into electric energy to be effectively utilized.
However, at present, hydrogen is produced by electrolyzing water by renewable energy, and the stored energy is mainly gaseous hydrogen as an energy storage medium, the energy density of the stored energy is small, high-pressure hydrogen needs to be shipped by a special tank body, the manufacturing cost of the existing special storage tank is high, the volume of a monomer is limited, the storage, transportation and transportation cost of the hydrogen is high, and the hydrogen consumption cost of an end user is high.
Based on the defects of the existing energy storage for hydrogen production by water electrolysis, which mainly stores energy by gaseous hydrogen and is applied, the improvement is needed.
Disclosure of Invention
In view of the above, the present invention provides a system and a method for comprehensively utilizing renewable energy based on liquid hydrogen energy storage, so as to solve or partially solve the problems in the prior art.
In a first aspect, the present invention provides a renewable energy comprehensive utilization system based on liquid hydrogen energy storage, including:
the electrolytic hydrogen production device is connected with a renewable energy power supply device, and the renewable energy power supply device provides electric energy for the electrolytic hydrogen production device to carry out electrolytic hydrogen production;
the hydrogen liquefying device is connected with a hydrogen output pipeline of the electrolytic hydrogen production device and is used for liquefying hydrogen;
the liquid hydrogen storage device is connected with the liquid hydrogen output end of the hydrogen liquefying device and is used for storing liquid hydrogen;
and the liquid hydrogen gasification device is connected with the output end of the liquid hydrogen storage device and is used for gasifying the liquid hydrogen.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage includes:
a storage cavern mined underground;
one end of the first pipeline is communicated with the storage hole, and the other end of the first pipeline is communicated with a liquid hydrogen output end of the hydrogen liquefying device;
and one end of the second pipeline is communicated with the storage hole, and the other end of the second pipeline is communicated with the liquid hydrogen output end of the hydrogen gasification device.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage comprises at least one of an alkaline aqueous solution electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device and a high-temperature solid oxide electrolytic hydrogen production device.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage comprises a liquid hydrogen gasification device, and the liquid hydrogen gasification device comprises one of an open rack gasifier, a submerged combustion gasifier, an intermediate medium gasifier and an air-temperature gasifier.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage further comprises a third pipeline, the third pipeline is communicated with the outer wall of the storage hole, and water is introduced into the outer wall of the storage hole through the third pipeline to form a frozen soil layer.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage further comprises an inverter electrically connected with the renewable energy power supply device and the electrolytic hydrogen production device, wherein the inverter is used for receiving the electric energy output by the renewable energy power supply device, performing alternating current-direct current conversion on the electric energy output by the renewable energy power supply device, and then providing the electric energy for the electrolytic hydrogen production device.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage further comprises a hydrogen energy utilization device, the hydrogen energy utilization device is connected with the hydrogen output end of the liquid hydrogen gasification device, and the hydrogen energy utilization device works by taking hydrogen as a raw material.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage comprises at least one of an expansion generator, a hydrogen fuel cell and a gas turbine.
Preferably, the renewable energy comprehensive utilization system based on liquid hydrogen energy storage further comprises a power grid, the renewable energy power supply device is electrically connected with the power grid, a part of electric energy of the renewable energy power supply device is used for providing electric energy for the electrolytic hydrogen production device, and the other part of electric energy is incorporated into the power grid.
In a second aspect, the invention further provides a comprehensive utilization method of renewable energy based on liquid hydrogen energy storage, which comprises the following steps:
providing the renewable energy comprehensive utilization system based on liquid hydrogen energy storage;
the renewable energy power supply device is used for supplying electric energy to the electrolytic hydrogen production device to produce hydrogen by electrolysis;
hydrogen enters a liquid hydrogen storage device through a hydrogen output pipeline of the electrolytic hydrogen production device and is liquefied;
liquid hydrogen enters a liquid hydrogen storage device through a liquid hydrogen output end of the hydrogen liquefying device to be stored;
liquid hydrogen enters the liquid hydrogen gasification device through the output end of the liquid hydrogen storage device and is gasified;
the hydrogen generated by gasification enters a hydrogen energy utilization device to be utilized.
Compared with the prior art, the renewable energy comprehensive utilization system and method based on liquid hydrogen energy storage have the following beneficial effects:
1. according to the renewable energy comprehensive utilization system based on liquid hydrogen energy storage, the electric energy provided by the renewable energy power supply device is utilized to electrolyze and produce hydrogen, the hydrogen is liquefied by the hydrogen liquefying device, and the hydrogen is liquefied and stored, so that the energy storage density of unit volume is improved, and the transportation is facilitated; the problems that the existing renewable energy hydrogen production energy storage by water electrolysis mainly uses gaseous hydrogen as an energy storage medium, the energy density of the stored energy is small, high-pressure hydrogen needs to be shipped by a special tank body, the manufacturing cost of the existing special storage tank is high, the volume of a monomer is limited, the storage, transportation and transportation costs of the hydrogen are high, and the hydrogen cost of a terminal user is high are solved;
2. the invention discloses a renewable energy comprehensive utilization system based on liquid hydrogen energy storage, wherein a liquid hydrogen storage device comprises: a storage well, a first conduit and a second conduit; liquid hydrogen in the hydrogen gasification device enters a storage cavity through a first pipeline for storage, and the liquid hydrogen stored in the storage cavity enters the hydrogen gasification device through a second pipeline; the storage cavity of underground mining is used as a liquid hydrogen storage container, compared with a filling method, the storage capacity of liquid hydrogen is increased, the storage cost is reduced, the energy density and the storage scale of hydrogen storage are improved, the unit energy storage cost is reduced, and the safety of hydrogen energy storage, transportation and filling processes is improved.
3. The method for comprehensively utilizing the renewable energy based on the liquid hydrogen energy storage utilizes the liquid hydrogen as the intermediate energy storage medium, not only can be directly utilized as an industrial raw material, but also can supply power or heat through a fuel cell or a gas turbine and the like, has wide terminal application field, and reduces the energy supply and the carbon emission in the industrial production process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a renewable energy comprehensive utilization system based on liquid hydrogen energy storage according to the present invention;
fig. 2 is a schematic structural diagram of a liquid hydrogen storage device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the application provides a renewable energy comprehensive utilization system based on liquid hydrogen energy storage, as shown in fig. 1, including:
the electrolytic hydrogen production device 2 is connected with the renewable energy power supply device 1, and the renewable energy power supply device 1 supplies electric energy to the electrolytic hydrogen production device 2 to produce hydrogen through electrolysis;
a hydrogen liquefying device 3 connected to a hydrogen output pipeline of the electrolytic hydrogen production device 2, the hydrogen liquefying device 3 being configured to liquefy hydrogen;
the liquid hydrogen storage device 4 is connected with the liquid hydrogen output end of the hydrogen liquefying device 3, and the liquid hydrogen storage device 4 is used for storing liquid hydrogen;
and the liquid hydrogen gasification device 5 is connected with the output end of the liquid hydrogen storage device 4, and the liquid hydrogen gasification device 5 is used for gasifying the liquid hydrogen.
It should be noted that the renewable energy comprehensive utilization system provided in the embodiment of the present application includes a renewable energy power supply device 1, an electrolytic hydrogen production device 2, a hydrogen liquefaction device 3, a liquid hydrogen storage device 4, and a liquid hydrogen gasification device 5; the renewable energy power supply device 1 is a device which supplies power by generating electric energy by renewable energy such as wind power generation, photovoltaic power generation, hydroelectric power generation and the like; the renewable energy system is limited by time, region and meteorological conditions, and the power generation characteristics have the defects of volatility, intermittence and the like, so that the consumption capacity of a power grid on renewable energy power is limited. The hydrogen is produced by electrolyzing water by utilizing the electric energy of the trough of the renewable energy source, and the hydrogen is utilized to store energy, so that the utilization efficiency of the renewable energy source is improved. The electrolytic hydrogen production device 2 is a device for electrolyzing water by utilizing an electrolysis principle to obtain hydrogen, specifically, the cathode of the electrolytic hydrogen production device 2 generates hydrogen, the electrolytic hydrogen production device 2 is not improved in the application, and the existing electrolytic hydrogen production device 2 is adopted; the hydrogen liquefying device 3 is a device for liquefying hydrogen, and the specific structure of the hydrogen liquefying device 3 is not improved in the application, for example, a helium refrigerating machine or a hydrogen refrigerating machine can be adopted; the refrigerator generates a refrigeration effect by utilizing the principle of a compressor, a heat exchanger and an expander to liquefy the hydrogen. A liquid hydrogen storage device 4 for storing liquid hydrogen, which can be stored in a heat-insulated sealed storage tank or other devices; specifically, the liquid hydrogen storage device 4 has a good adiabatic effect, and can reduce liquid hydrogen gasification caused by external heat transfer; in addition, the liquid hydrogen storage device 4 can be provided with a small refrigerator and is used for circulating and liquefying hydrogen generated by small amount of heat leakage; the liquid hydrogen storage device 4 is also provided with a nitrogen purging device which comprises a nitrogen fan and is used for replacing air in the storage device before and after hydrogen injection and exhaust; the liquid hydrogen storage device 4 is also provided with a liquid nitrogen precooling device for precooling the device before liquid hydrogen storage, so that the wall stress in the hydrogen injection process is reduced; the liquid hydrogen storage device 4 is provided with a hydrogen injection and discharge pipeline and a connector, and the hydrogen injection and discharge pipeline is positioned at the bottom of the storage device. Liquid hydrogen gasification equipment 5 for gasify to liquid hydrogen and make liquid hydrogen heat up and become gaseous, it is concrete, this application does not improve the concrete structure of liquid hydrogen gasification equipment 5, adopt current liquid hydrogen gasification equipment 5 can.
The working principle of the renewable energy comprehensive utilization system based on liquid hydrogen energy storage is as follows: the electric energy generated by the renewable energy power supply device 1 provides electric energy for the electrolytic hydrogen production device 2 to carry out electrolytic hydrogen production, and hydrogen generated by electrolysis enters the hydrogen liquefaction device 3 through a hydrogen output pipeline of the electrolytic hydrogen production device and is liquefied; liquid hydrogen generated after the hydrogen is liquefied enters a liquid hydrogen storage device 4 to be stored; the liquid hydrogen in the liquid hydrogen storage device 4 enters the liquid hydrogen gasification device 5 to be gasified to generate hydrogen gas, and then the hydrogen gas is used. According to the renewable energy comprehensive utilization system based on liquid hydrogen energy storage, the electric energy provided by the renewable energy power supply device is utilized to electrolyze and produce hydrogen, the hydrogen is liquefied by the hydrogen liquefying device, and the hydrogen is liquefied and stored, so that the energy storage density of unit volume is improved, and the hydrogen is convenient to transport; the problems that the existing renewable energy hydrogen production energy storage by water electrolysis mainly uses gaseous hydrogen as an energy storage medium, the energy density of the stored energy is small, high-pressure hydrogen needs to be shipped by a special tank body, the manufacturing cost of the existing special storage tank is high, the volume of a monomer is limited, the storage, transportation and transportation costs of the hydrogen are high, and the hydrogen cost of a terminal user is high are solved.
Specifically, in the electrolytic hydrogen production apparatus 2 in the embodiment of the present application, the cathode generates hydrogen, the anode generates oxygen, and the oxygen generated by the anode can be collected and utilized according to the use condition.
In some embodiments, the liquid hydrogen storage device 4 comprises:
a storage cavern 41 mined underground;
a first pipe 42 having one end communicating with the storage cavity 41 and the other end communicating with the liquid hydrogen output end of the hydrogen liquefying device 3;
and a second pipe 43 having one end communicating with the storage cavity 41 and the other end communicating with the liquid hydrogen output end of the hydrogen gas gasification device 5.
Specifically, the storage hole 41 is mined underground, the specific mining depth is 200-500 m and the like, a ground hole, a salt hole and the like existing underground can be used as the storage hole 41, and the storage hole 41 is used for storing liquid hydrogen; one end of the first pipeline 42 is communicated with the storage cavity 41, the other end of the first pipeline is communicated with the liquid hydrogen output end of the hydrogen liquefying device 3, liquid hydrogen in the hydrogen liquefying device 3 enters the storage cavity 41 through the first pipeline 42 for storage, and the liquid hydrogen stored in the storage cavity 41 enters the hydrogen gasifying device 5 through the second pipeline 43. In the scheme, the storage hole 41 for underground mining is used as a liquid hydrogen storage container, compared with a filling method, the storage capacity of liquid hydrogen is increased, the storage cost is reduced, the energy density and the storage scale of hydrogen storage are improved, the unit energy storage cost is reduced, and the safety of the hydrogen energy storage, transportation and filling processes is improved.
In some embodiments, electrolytic hydrogen production apparatus 2 comprises at least one of an alkaline aqueous solution electrolytic hydrogen production apparatus, a solid polymer electrolytic hydrogen production apparatus, and a high temperature solid oxide electrolytic hydrogen production apparatus.
In some embodiments, the liquid hydrogen gasification apparatus 5 comprises one of an open rack gasifier, a submerged combustion gasifier, an intermediate medium gasifier, and an air temperature gasifier. The liquid hydrogen vaporizer 5 supplies heat required for vaporizing liquid hydrogen by using an external medium. In practice, the liquid hydrogen gasification device 5 is also provided with a pressure and temperature control and alarm device for controlling the pressure and temperature of the gasification process. The liquid hydrogen gasification device 5 can be used for conveying or filling hydrogen after the pressure is increased by a hydrogen compressor; the liquid hydrogen gasification device 5 can be optionally provided with a hydrogen buffer tank for eliminating flow and pressure fluctuation between a compressor and a hydrogen user, and hydrogen can be stored.
In some embodiments, the liquid hydrogen storage apparatus 4 further comprises a third conduit 44, the third conduit 44 is in communication with the outer wall of the storage cavity 41, and water is passed through the third conduit 44 to the outer wall of the storage cavity 41 to form a frozen soil layer.
In the above embodiment, water is injected to the outer wall of the storage cavity 41 through the third pipeline 44, when the liquid hydrogen is introduced into the storage cavity 41, the temperature of the outer wall of the storage cavity 41 is rapidly reduced, meanwhile, the water in the outer wall of the storage cavity 41 is frozen to form a frozen soil layer, and the dense storage cavity 41 formed by the frozen soil layer stores the liquid hydrogen, so as to prevent the liquid hydrogen from volatilizing and leaking.
In some embodiments, valves are provided in each of the first, second and third conduits 42, 43, 44.
In some embodiments, the inner wall of the storage cavity 41 is further provided with a thermal insulation buffer layer and a support layer in sequence, wherein the thermal insulation buffer layer is made of a material or powder with a certain porosity, such as perlite, and the bulk density of the perlite is 10-500 kg/m3The supporting layer is made of concrete or refractory bricks or other materials; the heat insulation buffer layer plays a role in heat insulation and buffering, and the support layer plays a role in increasing the strength of the storage hole 41, so that deformation caused by soil pressure with a certain thickness above the storage hole 41 after long-term operation is relieved.
In some embodiments, the system further comprises an inverter 6 electrically connected to the renewable energy power supply device 1 and the electrolytic hydrogen production device 2, wherein the inverter 6 is configured to receive the electric energy output by the renewable energy power supply device 1, and then convert the electric energy into ac power and supply the electric energy to the electrolytic hydrogen production device 2.
In some embodiments, a hydrogen energy utilization device 7 is further included, the hydrogen energy utilization device 7 is connected with the hydrogen output end of the liquid hydrogen gasification device 5, and the hydrogen energy utilization device works by taking hydrogen as a raw material.
In some embodiments, the hydrogen energy utilizing device includes at least one of an expander generator 71, a hydrogen fuel cell 72, and a gas turbine 73.
In the above embodiment, the expander generator 71 utilizes hydrogen to generate electrical energy that can be used to power the electrolytic hydrogen plant 2 as well as for other production; the hydrogen fuel cell 72 uses hydrogen as a raw material to generate electricity, and the electricity generated in the same way can be used for supplying power to the electrolytic hydrogen production device 2 and can also be used for other production; the gas turbine 73 uses hydrogen as a working medium to drive the impeller to rotate at a high speed, and converts chemical energy generated by fuel combustion into electric energy and heat energy.
In some embodiments, the system further comprises an electric grid 8, the renewable energy power supply device 1 is electrically connected with the electric grid 8, one part of electric energy of the renewable energy power supply device 1 is used for supplying electric energy to the electrolytic hydrogen production device 2, and the other part of electric energy is merged into the electric grid 8.
Specifically, the gas turbine 73 is electrically connected to the power grid 8, the electric power generated by the gas turbine 73 is incorporated into the power grid 8, and the heat energy generated by the gas turbine 73 is used for industrial production.
Based on the same inventive concept, the embodiment of the application also provides a comprehensive utilization method of renewable energy based on liquid hydrogen energy storage, which comprises the following steps:
s1, providing the renewable energy comprehensive utilization system based on the liquid hydrogen energy storage;
s2, utilizing the renewable energy power supply device to provide electric energy for the electrolytic hydrogen production device to produce hydrogen through electrolysis;
s3, allowing the hydrogen to enter a liquid hydrogen storage device through a hydrogen output pipeline of the electrolytic hydrogen production device and liquefying the hydrogen;
s4, allowing the liquid hydrogen to enter a liquid hydrogen storage device through a liquid hydrogen output end of the hydrogen liquefying device for storage;
s5, enabling the liquid hydrogen to enter a liquid hydrogen gasification device through the output end of the liquid hydrogen storage device and further gasifying the liquid hydrogen;
and S6, utilizing the hydrogen generated by gasification.
Specifically, in the above embodiments, hydrogen gas may be used as an industrial raw material to directly participate in industrial production, for example, it may be used as a fuel to generate electricity or supply heat, or it may be supplied with power by a hydrogen fuel cell; hydrogen is used as the attribute of chemical raw materials, and can be used as reducing gas to carry out steel smelting, synthesis of ammonia, petroleum smelting, fine chemical industry, medicine production raw materials and the like; the hydrogen is used as an energy attribute, and the hydrogen is mixed with natural gas in a gas turbine or directly combusted to generate electricity or supply heat, so that the chemical potential energy of the hydrogen is utilized; in the semiconductor industry, high purity hydrogen has applications in crystal growth and substrate preparation, oxidation processes, epitaxial processes, and Chemical Vapor Deposition (CVD) techniques; electricity is generated by a hydrogen fuel cell to provide a power supply for an automobile.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A renewable energy comprehensive utilization system based on liquid hydrogen energy storage is characterized by comprising:
the electrolytic hydrogen production device is connected with a renewable energy power supply device, and the renewable energy power supply device provides electric energy for the electrolytic hydrogen production device to carry out electrolytic hydrogen production;
the hydrogen liquefying device is connected with a hydrogen output pipeline of the electrolytic hydrogen production device and is used for liquefying hydrogen;
the liquid hydrogen storage device is connected with a liquid hydrogen output end of the hydrogen liquefying device and is used for storing liquid hydrogen;
and the liquid hydrogen gasification device is connected with the output end of the liquid hydrogen storage device and is used for gasifying the liquid hydrogen.
2. The liquid hydrogen energy storage based renewable energy comprehensive utilization system according to claim 1, wherein said liquid hydrogen storage device comprises:
a storage cavern mined underground;
one end of the first pipeline is communicated with the storage cavity, and the other end of the first pipeline is communicated with a liquid hydrogen output end of the hydrogen liquefying device;
and one end of the second pipeline is communicated with the storage hole, and the other end of the second pipeline is communicated with the liquid hydrogen output end of the hydrogen gasification device.
3. The comprehensive utilization system of renewable energy based on liquid hydrogen energy storage according to claim 1, wherein said hydrogen production device comprises at least one of an alkaline aqueous solution hydrogen production device, a solid polymer hydrogen production device, and a high temperature solid oxide hydrogen production device.
4. The system of claim 1, wherein the liquid hydrogen gasification device comprises one of an open rack gasifier, a submerged combustion gasifier, an intermediate gasifier, and an air-temperature gasifier.
5. The liquid hydrogen energy storage based renewable energy comprehensive utilization system according to claim 2, wherein said liquid hydrogen storage device further comprises a third pipeline, said third pipeline is communicated with the outer wall of said storage cavity, and water is supplied to the outer wall of said storage cavity through said third pipeline to form a frozen soil layer.
6. The comprehensive utilization system of renewable energy sources based on liquid hydrogen energy storage according to claim 1, further comprising an inverter electrically connected to the renewable energy source power supply device and the electrolytic hydrogen production device, wherein the inverter is configured to receive the electric energy output by the renewable energy source power supply device, convert the electric energy into ac power, and supply the electric energy to the electrolytic hydrogen production device.
7. The comprehensive utilization system of renewable energy sources based on liquid hydrogen energy storage according to any one of claims 1 to 6, characterized by further comprising a hydrogen energy utilization device, wherein the hydrogen energy utilization device is connected with a hydrogen output end of the liquid hydrogen gasification device, and the hydrogen energy utilization device works by taking hydrogen as a raw material.
8. The liquid hydrogen energy storage based renewable energy comprehensive utilization system according to claim 7, wherein said hydrogen energy utilization device comprises at least one of an expansion generator, a hydrogen fuel cell, and a gas turbine.
9. The system for comprehensive utilization of renewable energy sources based on liquid hydrogen energy storage according to claim 1, further comprising an electric grid, wherein the renewable energy source power supply device is electrically connected with the electric grid, a part of electric energy of the renewable energy source power supply device is used for supplying electric energy to the electrolytic hydrogen production device, and another part of electric energy is incorporated into the electric grid.
10. A renewable energy comprehensive utilization method based on liquid hydrogen energy storage is characterized by comprising the following steps:
providing a renewable energy comprehensive utilization system based on liquid hydrogen energy storage according to any one of claims 1 to 9;
the renewable energy power supply device is used for supplying electric energy to the electrolytic hydrogen production device to carry out electrolytic hydrogen production;
hydrogen enters a liquid hydrogen storage device through a hydrogen output pipeline of the electrolytic hydrogen production device and is liquefied;
liquid hydrogen enters a liquid hydrogen storage device through a liquid hydrogen output end of the hydrogen liquefying device to be stored;
liquid hydrogen enters the liquid hydrogen gasification device through the output end of the liquid hydrogen storage device and is gasified;
the hydrogen produced by gasification is utilized.
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| CN202210343052.3A CN114738662A (en) | 2022-04-02 | 2022-04-02 | Renewable energy comprehensive utilization system and method based on liquid hydrogen energy storage |
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| CN202210343052.3A CN114738662A (en) | 2022-04-02 | 2022-04-02 | Renewable energy comprehensive utilization system and method based on liquid hydrogen energy storage |
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