Floating hydrogen production storage and transportation system and method for off-grid large-scale offshore wind power

Abstract

The invention relates to the technical field of offshore hydrogen production, storage and transportation, and provides a floating hydrogen production, storage and transportation system and method for off-grid large-scale offshore wind power, and the system comprises a floating water electrolysis flexible hydrogen production, storage and transportation device which uses electric energy to produce and store hydrogen; the organic liquid hydrogen transportation regasification ship receives the organic liquid hydrogen carrier and dehydrogenates and gasifies the organic liquid hydrogen carrier; a hydrogen storage tank receiving hydrogen; the floating type water electrolysis flexible hydrogen production storage and transportation device comprises an energy management module for distributing obtained electric energy; the water source supply module provides water for hydrogen production through water electrolysis according to the electric energy distributed by the energy management module; and the hydrogen production module is used for performing water electrolysis hydrogen production according to the electric energy distributed by the energy management module and the water for water electrolysis hydrogen production provided by the water source supply module, and temporarily storing the produced hydrogen after reacting with the organic liquid hydrogen carrier. Electric energy provided for the power plant is distributed through the energy management module, and water source supply and electrolytic hydrogen production are achieved through electric energy distribution.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore hydrogen production, storage and transportation, and in particular to a floating hydrogen production, storage and transportation system and method for off-grid large-scale offshore wind power. Background Art

[0002] With the transformation of the global energy structure and the growing demand for clean energy, offshore wind power, as an important renewable energy source, has received widespread attention for its development and utilization. In particular, offshore wind power in deep sea areas has become an important direction for the development of the wind power industry due to its advantages such as rich wind energy resources and high power generation efficiency. However, with the development of offshore wind power in deep sea and on a large scale, the traditional grid-connected model faces problems such as high grid transmission engineering costs, high technical difficulties in long-distance power transmission, and difficulty in absorbing large-scale wind power grid-connected onshore. In order to overcome these challenges, the development model of off-grid offshore wind power hydrogen production came into being, that is, to directly use offshore wind power for hydrogen production, which can not only effectively utilize wind energy resources, but also solve the intermittent and instability problems of wind power through hydrogen storage and transportation.

[0003] Although the off-grid offshore wind power hydrogen production model has significant potential and advantages, there are still a series of technical problems that need to be solved in practical applications:

[0004] Stability control and matching issues of offshore off-grid fluctuating wind power and hydrogen production: The output power of offshore wind power is random and volatile, which brings challenges to the stability and continuity of the hydrogen production process. How to achieve efficient matching of wind power and hydrogen production systems and ensure the smooth operation of the hydrogen production process is a key issue in the current technological development.

[0005] Waste of energy efficiency: During the hydrogenation reaction of organic liquids at sea, a large amount of heat is generated. At present, this heat is often not effectively utilized, resulting in energy waste. How to recover and utilize this heat and improve the energy efficiency of the entire system is an important direction of technical optimization.

[0006] Equipment matching and transportation of organic liquid hydrogen storage: Traditional gaseous hydrogen and liquid hydrogen storage and transportation methods have the problems of high cost and high energy consumption. As an emerging hydrogen storage technology, organic liquid hydrogen storage has the advantages of high hydrogen storage density and good safety, but its hydrogenation device and dehydrogenation device need to be precisely matched, and currently only point-to-point transportation can be achieved, which limits its large-scale application. Summary of the invention

[0007] The purpose of the present invention is to solve at least one technical problem in the background technology and to provide a floating hydrogen production, storage and transportation system and method for off-grid large-scale offshore wind power.

[0008] To achieve the above-mentioned object, the present invention provides a floating hydrogen production, storage and transportation system for off-grid large-scale offshore wind power, comprising:

[0009] The floating water electrolysis flexible hydrogen production, storage and transportation device uses the electricity provided by the offshore wind farm to produce and store hydrogen;

[0010] The organic liquid hydrogen transport regasification ship receives the hydrogenated organic liquid hydrogen carrier transported by the floating water electrolysis flexible hydrogen production storage and transportation device, and performs dehydrogenation and gasification treatment on the hydrogenated organic liquid hydrogen carrier;

[0011] A hydrogen storage tank is arranged on land to receive the regasified hydrogen transported by the organic liquid hydrogen regasification ship;

[0012] The floating water electrolysis flexible hydrogen production storage and transportation device comprises:

[0013] The energy management module distributes the acquired electrical energy;

[0014] A water supply module, which provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module;

[0015] The hydrogen production module performs water electrolysis to produce hydrogen according to the electric energy allocated by the energy management module and the water for water electrolysis to produce hydrogen provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with an organic liquid hydrogen carrier.

[0016] According to one aspect of the present invention, the floating water electrolysis flexible hydrogen production storage and transportation device further includes:

[0017] The heat storage module receives and stores the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier, and then supplies the stored heat to the water source supply module to heat the water used for electrolyzing water to produce hydrogen and / or converts the heat into electrical energy to supply the energy management module.

[0018] According to one aspect of the present invention, the heat storage module comprises: a heat collection and heat exchange module, a heat storage compartment and a thermoelectric conversion module;

[0019] The heat collection and heat exchange module collects the heat generated by the hydrogen production module when producing hydrogen by electrolyzing water and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier, and then transmits the collected heat to the heat storage cabin;

[0020] The heat storage cabin receives the heat transmitted by the heat collection and heat exchange module, stores the heat in the form of sensible heat, latent heat or thermochemical heat storage, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module;

[0021] The thermoelectric conversion module converts the heat transmitted by the heat storage compartment into electrical energy and supplies the electrical energy to the energy management module.

[0022] According to one aspect of the present invention, heat storage material is provided in the heat storage chamber, and the heat storage chamber receives heat transmitted by the heat collection and heat exchange module to heat the heat storage material to store heat, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module.

[0023] According to one aspect of the present invention, the water supply module comprises: a seawater lifting module for transporting seawater and a seawater pretreatment module for receiving the transported seawater and filtering and desalinating the seawater.

[0024] According to one aspect of the present invention, the hydrogen production module comprises: a rectification module, a water electrolysis hydrogen production module, a gas-liquid separation and purification module, an organic liquid hydrogenation module and an organic liquid hydrogen-containing liquid tank;

[0025] The rectifier module receives the electric energy distributed by the energy management module and converts the alternating current into direct current;

[0026] The water electrolysis hydrogen production module receives the seawater pretreated by the seawater pretreatment module, and performs electrolysis hydrogen production on the treated seawater through the direct current rectified by the rectification module;

[0027] The gas-liquid separation and purification module separates and purifies the hydrogen produced by the water electrolysis hydrogen production module from the liquid;

[0028] The organic liquid hydrogenation module is provided with an organic liquid as a hydrogen carrier and a hydrogenation catalyst. The organic liquid is mixed with hydrogen to form a liquid which is then stored in the organic liquid hydrogen-containing liquid tank.

[0029] According to one aspect of the present invention, the water electrolysis hydrogen production module is composed of one or more of an alkaline water electrolysis hydrogen production device, a proton exchange membrane water electrolysis hydrogen production device, an anion exchange membrane water electrolysis hydrogen production device, and a high-temperature solid oxide water electrolysis hydrogen production device.

[0030] According to one aspect of the present invention, the organic liquid is a heterocyclic, carbazole or indole organic liquid, and the hydrogenation catalyst is a noble metal, supported metal or non-noble metal catalyst.

[0031] According to one aspect of the present invention, the organic liquid hydrogen regasification ship comprises:

[0032] The second organic liquid hydrogen-containing liquid tank stores the hydrogenated organic liquid hydrogen carrier;

[0033] Organic liquid hydrogen-poor tank, storing the dehydrogenated organic liquid hydrogen carrier;

[0034] Heat storage lean heat storage tank, storing heat storage materials that do not contain heat;

[0035] The heat storage tank contains heat, and stores heat storage materials;

[0036] Organic liquid dehydrogenation system, which removes and purifies hydrogen from hydrogen-containing organic liquid;

[0037] Pumping systems for liquid material transportation.

[0038] According to one aspect of the present invention, the floating water electrolysis flexible hydrogen production storage and transportation device and the organic liquid hydrogen transport regasification ship are moored by berthing or stern;

[0039] The hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material in the floating water electrolysis flexible hydrogen production device are respectively transported from the first organic liquid hydrogen-containing liquid tank and the heat storage tank to the second organic liquid hydrogen-containing liquid tank and the heat storage tank of the organic liquid regasification ship through flexible pipelines or storage tanks; the organic liquid hydrogen-poor carrier and heat storage-poor heat material in the organic liquid hydrogen transport regasification ship are respectively transported from the organic liquid hydrogen-poor liquid tank and the heat storage-poor heat storage tank to the floating water electrolysis flexible hydrogen production and storage and transportation device through flexible pipelines.

[0040] To achieve the above object, the present invention further provides an offshore wind power hydrogen production storage and transportation method implemented by the above-mentioned off-grid large-scale offshore wind power floating hydrogen production storage and transportation system, comprising:

[0041] The acquired electrical energy is distributed to the water supply module and the hydrogen production module through the energy management module;

[0042] The water source supply module provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module;

[0043] The hydrogen production module performs water electrolysis to produce hydrogen according to the electric energy allocated by the energy management module and the water for water electrolysis to produce hydrogen provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with an organic liquid hydrogen carrier;

[0044] The organic liquid hydrogen regasification ship receives the hydrogenated organic liquid hydrogen carrier transported by the hydrogen production module, then transports the hydrogenated organic liquid hydrogen carrier to the destination, dehydrogenates it, and finally transports it to the land hydrogen storage tank.

[0045] According to one aspect of the present invention, after the organic liquid hydrogen regasification ship is loaded with hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material, it is transported to the land hydrogen storage tank by its own power, and after the organic liquid is dehydrogenated and gasified on board, the purified hydrogen gas is transported to the land hydrogen storage tank.

[0046] According to one aspect of the present invention, the dehydrogenation process includes: the hydrogen-containing organic liquid in the second organic liquid hydrogen-containing tank of the organic liquid hydrogen transport regasification ship is transported to the organic liquid dehydrogenation system by a pumping system, and hydrogen is released after reacting with the dehydrogenation catalyst in the dehydrogenator, and the hydrogen is transported to a land hydrogen storage tank after purification; the dehydrogenated organic liquid is stored in an organic liquid hydrogen-depleted tank; the dehydrogenation process of the hydrogen-containing organic liquid is an endothermic reaction, and heat is provided by the heat storage material in the heat storage tank through heat exchange, and the heat storage material after heat exchange is stored in the heat storage tank.

[0047] According to one scheme of the present invention, an offshore wind power hydrogen production, storage and transportation system comprises: a floating water electrolysis flexible hydrogen production, storage and transportation device, which utilizes the electric energy provided by the offshore wind farm to produce and store hydrogen; an organic liquid hydrogen transport and regasification ship, which receives the hydrogenated organic liquid hydrogen carrier transported by the floating water electrolysis flexible hydrogen production, storage and transportation device, and dehydrogenates and regasifies the hydrogenated organic liquid hydrogen carrier; a hydrogen storage tank, which is arranged on land and receives the dehydrogenated gasified hydrogen transported by the organic liquid hydrogen transport and regasification ship; the floating water electrolysis flexible hydrogen production, storage and transportation device comprises: an energy management module, which distributes the acquired electric energy; a water source supply module, which provides water for hydrogen production by water electrolysis according to the electric energy distributed by the energy management module; a hydrogen production module, which performs water electrolysis to produce hydrogen according to the electric energy distributed by the energy management module and the water for hydrogen production by water electrolysis provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with the organic liquid hydrogen carrier. With such a configuration, the electric energy provided by the power plant can be distributed through the energy management module, the water source supply module provides water for electrolysis of water to produce hydrogen through a portion of the distributed electric energy, and the hydrogen production module uses a portion of the distributed electric energy to electrolyze the water source to produce hydrogen, thereby producing hydrogen and storing it. When storing hydrogen, it can be stored in the form of organic liquid hydrogen storage, and then the organic liquid hydrogen carrier after hydrogenation is transported to the destination by an organic liquid hydrogen transport and regasification ship, and then transported to a hydrogen storage tank on land for storage and use after dehydrogenation and gasification.

[0048] According to one solution of the present invention, the floating water electrolysis flexible hydrogen production storage and transportation device also includes: a heat storage module, which receives and stores the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier, and then supplies the stored heat to the water source supply module to heat the water for electrolyzing water to produce hydrogen and / or converts it into electric energy to supply the energy management module. In this way, the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier can be effectively utilized, and the generated heat can be used to heat the water source for hydrogen production on the one hand to reduce the consumption of electric energy; on the other hand, it can be converted into electric energy to supply the energy management module, so that when the floating water electrolysis flexible hydrogen production storage and transportation device is off-grid, the electric energy generated in the system can still be distributed to the water source supply module and the hydrogen production module for hydrogen production and storage operations, ensuring that it can still operate online when no electric field power is obtained or the power supply is insufficient, effectively improving the energy-saving and environmental protection performance, and effectively improving the energy utilization efficiency of the entire system.

[0049] According to one solution of the present invention, the heat storage module includes: a heat collection and heat exchange module, a heat storage tank and a thermoelectric conversion module; the heat collection and heat exchange module collects the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier, and then transmits the collected heat to the heat storage tank; the heat storage tank receives the heat transmitted by the heat collection and heat exchange module, stores the heat in the form of sensible heat, latent heat or thermochemical heat storage, and then distributes the stored heat to the water source supply module and / or the thermoelectric conversion module; the thermoelectric conversion module converts the heat transmitted by the heat storage tank into electrical energy and then supplies it to the energy management module. In this way, the heat generated by the system can be effectively collected by the heat collection and heat exchange module, and then the heat is distributed to the water source supply module and / or the thermoelectric conversion module through the heat storage tank, so that the water source for electrolyzing water to produce hydrogen is heated by the water source supply module and / or the thermoelectric conversion module, and the heat energy is converted into electrical energy to continue to supply the system operation, so that the heat energy generated by the system can be efficiently utilized to avoid energy loss.

[0050] According to one solution of the present invention, the seawater pretreatment module filters the seawater through quartz sand and activated carbon, and then desalinates the filtered seawater through a reverse osmosis membrane. This arrangement can make the subsequent electrolytic hydrogen production more efficient and pure.

[0051] According to one scheme of the present invention, the hydrogen production module includes: a rectifier module, a water electrolysis hydrogen production module, a gas-liquid separation and purification module, an organic liquid hydrogenation module and an organic liquid hydrogen-containing liquid tank; the rectifier module receives the electric energy distributed by the energy management module and converts the alternating current into direct current; the water electrolysis hydrogen production module receives the seawater pretreated by the seawater pretreatment module, and uses the direct current rectified by the rectifier module to perform electrolysis hydrogen production on the treated seawater; the gas-liquid separation and purification module separates and purifies the hydrogen produced by the water electrolysis hydrogen production module from the liquid; the organic liquid hydrogenation module is provided with an organic liquid as a hydrogen carrier and a hydrogenation catalyst, and the organic liquid is mixed with hydrogen to form a liquid which is stored in the organic liquid hydrogen-containing liquid tank. With such an arrangement, the pretreated water source can be electrolyzed to produce hydrogen through the hydrogen production module, and the produced hydrogen can be purified. The purified hydrogen can be stored in the organic liquid through a mixing reaction with an organic liquid. This process makes hydrogen production convenient and fast as well as easy to store and transport. In addition, during the process of hydrogen production by electrolysis, the water source is heated by the heat provided by the heat storage tank, making the hydrogen production process more efficient, and can effectively save energy and efficiently utilize the heat generated by the system.

[0052] According to the solution of the present invention, the present invention can obtain the following beneficial effects:

[0053] Effective use of heat and energy self-sufficiency: Through technological innovation, the present invention realizes the effective use of the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen, as well as the heat generated when hydrogen reacts with an organic liquid hydrogen carrier. Specifically, the generated heat is used on the one hand to heat the water source for hydrogen production to reduce the consumption of electric energy; on the other hand, the heat is converted into electric energy to supply the energy management module. In this way, even when the floating water electrolysis flexible hydrogen production, storage and transportation device is off-grid, the electric energy generated in the system can be distributed to the water source supply module and the hydrogen production module to ensure the continuity of the hydrogen production and storage operations, effectively improve the energy-saving and environmental protection performance, and significantly improve the energy utilization efficiency of the entire system.

[0054] Flexibility of offshore organic liquid hydrogen storage and transportation and loading and unloading system: The present invention proposes an offshore organic liquid hydrogen storage and transportation and loading and unloading system, which stores hydrogen-rich organic liquid in the liquid tanks of offshore floating production facilities, similar to the FPSO (Floating Production Storage and Offloading) used in offshore oil field development. The organic liquid storage tank can adopt the crude oil tank of the FPSO and be regularly transported to the onshore terminal or the docked organic liquid dehydrogenation ship FSRU (Floating Storage and Regasification Unit) by shuttle cruise ships. This design breaks the point-to-point operation mode of the organic liquid hydrogen storage device, realizes the flexible shore handling of organic liquid dehydrogenation, and is no longer limited to a specific wharf, thereby greatly improving the flexibility and economic benefits of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A block diagram schematically shows the structural arrangement of a floating water electrolysis flexible hydrogen production, storage and transportation device for an off-grid large-scale offshore wind power floating hydrogen production, storage and transportation system according to an embodiment of the present invention;

[0056] Figure 2 A schematic diagram showing the working principle of a floating water electrolysis flexible hydrogen production storage and transportation device and an organic liquid hydrogen transport regasification ship according to an embodiment of the present invention;

[0057] Figure 3 The working principle diagram of an organic liquid hydrogen regasification ship and a hydrogen storage tank according to one embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0058] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0059] As used herein, the term "including" and variations thereof are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment."

[0060] Figure 1 The structural arrangement block diagram of a floating water electrolysis flexible hydrogen production storage and transportation device for an off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to one embodiment of the present invention is schematically shown. Figure 1 As shown, in this embodiment, the off-grid large-scale offshore wind power floating hydrogen production storage and transportation system includes:

[0061] The floating water electrolysis flexible hydrogen production, storage and transportation device 1 utilizes the electric energy provided by the offshore wind farm 2 to produce and store hydrogen;

[0062] The organic liquid hydrogen transport and regasification ship receives the hydrogenated organic liquid hydrogen transported by the floating water electrolysis flexible hydrogen production storage and transportation device 1;

[0063] Hydrogen storage tanks are deployed on land to receive regasified hydrogen delivered by organic liquid hydrogen regasification ships;

[0064] The floating water electrolysis flexible hydrogen production storage and transportation device includes:

[0065] The energy management module 13 distributes the acquired electric energy;

[0066] The water supply module provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module;

[0067] The hydrogen production module performs water electrolysis to produce hydrogen according to the electric energy allocated by the energy management module and the water for water electrolysis provided by the water supply module, and temporarily stores the produced hydrogen after reacting with the organic liquid hydrogen carrier. With such an arrangement, the electric energy provided by the power plant can be distributed by the energy management module, the water supply module provides a water source for water electrolysis to produce hydrogen by using a part of the allocated electric energy, and the hydrogen production module performs water electrolysis to produce hydrogen by using a part of the allocated electric energy, thereby producing and storing hydrogen. When storing hydrogen, it can be stored in the form of organic liquid hydrogen storage. The stored hydrogenated organic liquid hydrogen carrier can be hoisted and transported to an organic liquid hydrogen transport and regasification ship through a flexible hose or storage tank, and then the hydrogenated organic liquid hydrogen carrier is transported to the destination by the organic liquid hydrogen transport and regasification ship, and then transported to a hydrogen storage tank on land for storage and use after dehydrogenation and gasification.

[0068] In this embodiment, the floating water electrolysis flexible hydrogen production storage and transportation device and the organic liquid hydrogen transport regasification ship can be moored by berthing or stern.

[0069] Furthermore, if Figure 1 As shown, according to one embodiment of the present invention, the floating water electrolysis flexible hydrogen production storage and transportation device also includes:

[0070] The heat storage module receives and stores the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with an organic liquid hydrogen carrier, and then supplies the stored heat to the water source supply module to heat the water used for electrolyzing water to produce hydrogen and / or converts it into electric energy to supply the energy management module. In this way, the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated by the reaction of hydrogen with an organic liquid hydrogen carrier can be effectively utilized, and the generated heat can be used to heat the water source for hydrogen production to reduce the consumption of electric energy on the one hand; on the other hand, it can be converted into electric energy to supply the energy management module, so that when the floating water electrolysis flexible hydrogen production storage and transportation device 1 is off-grid, the electric energy generated in the system can still be distributed to the water source supply module and the hydrogen production module for hydrogen production and storage operations, ensuring that it can still operate online when no electric field power is obtained or the power supply is insufficient, effectively improving the energy-saving and environmental protection performance, and effectively improving the energy utilization efficiency of the entire system.

[0071] Furthermore, if Figure 1 As shown, in this embodiment, the heat storage module includes: a heat collection and heat exchange module 3, a heat storage compartment 4 and a thermoelectric conversion module 5;

[0072] The heat collection and heat exchange module 3 collects the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen and the heat generated when hydrogen reacts with the organic liquid hydrogen carrier, and then transmits the collected heat to the heat storage cabin 4;

[0073] The heat storage chamber 4 receives the heat transmitted by the heat collection and heat exchange module 3, stores the heat in the form of sensible heat, latent heat or thermochemical heat storage, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module 5;

[0074] The thermoelectric conversion module converts the heat transmitted by the heat storage tank 4 into electrical energy and supplies it to the energy management module. With this arrangement, the heat generated by the system can be effectively collected by the heat collection and heat exchange module 3, and then the heat is distributed to the water source supply module and / or the thermoelectric conversion module 5 through the heat storage tank 4, so that the water source for electrolysis of water to produce hydrogen can be heated by the water source supply module and / or the thermoelectric conversion module 5, and the heat energy is converted into electrical energy to continue to supply the system operation, so that the heat energy generated by the system can be efficiently utilized to avoid energy loss.

[0075] Furthermore, in this embodiment, a heat storage material is provided in the heat storage compartment, for example, and the heat storage compartment receives the heat transmitted by the heat collection and heat exchange module to heat the heat storage material to store heat, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module.

[0076] Furthermore, if Figure 1 As shown, in this embodiment, the water supply module includes: a seawater lifting module 6 for transporting seawater and a seawater pretreatment module 7 for receiving the transported seawater and filtering and desalinating the seawater.

[0077] In this embodiment, the seawater lifting module 6 includes, for example, core facilities such as a seawater lifting pump, a lifting pump protection pipe, and a seawater pipeline, as well as auxiliary facilities such as a pipeline support platform, an offshore mounting bracket, and an anti-collision protection frame. In this way, the core facilities such as the seawater lifting pump, the lifting pump protection pipe, and the seawater pipeline can be supported and protected by auxiliary facilities such as the pipeline support platform, the offshore mounting bracket, and the anti-collision protection frame, and then the seawater is extracted and lifted by the core facilities such as the seawater lifting pump, the lifting pump protection pipe, and the seawater pipeline to realize the transportation of seawater.

[0078] Furthermore, in this embodiment, the seawater pretreatment module 7 filters the seawater through quartz sand and activated carbon, and then desalinates the filtered seawater through a reverse osmosis membrane. This arrangement can make the subsequent electrolytic hydrogen production more efficient and pure.

[0079] Furthermore, if Figure 1 As shown, in this embodiment, the hydrogen production module includes: a rectification module 8, a water electrolysis hydrogen production module 9, a gas-liquid separation and purification module 10, an organic liquid hydrogenation module 11 and a first organic liquid hydrogen-containing liquid tank 12;

[0080] The rectifier module 8 receives the electric energy distributed by the energy management module and converts the alternating current into direct current;

[0081] The water electrolysis hydrogen production module 9 receives the seawater pre-treated by the seawater pre-treatment module 7, and performs electrolysis hydrogen production on the treated seawater with the direct current rectified by the rectification module 8;

[0082] The gas-liquid separation and purification module 10 separates and purifies the hydrogen produced by the water electrolysis hydrogen production module 9 from the liquid;

[0083] The organic liquid hydrogenation module 11 is provided with an organic liquid as a hydrogen carrier and a hydrogenation catalyst. The organic liquid is mixed with hydrogen to form a liquid which is then stored in the organic liquid hydrogen-containing liquid tank 12. With such a configuration, the pretreated water source can be electrolyzed to produce hydrogen through the hydrogen production module, and the produced hydrogen is purified. The purified hydrogen is mixed with the organic liquid to perform organic liquid hydrogen storage. This process makes hydrogen production convenient and fast and is easy to store and transport. In addition, in the process of electrolytic hydrogen production, the water source is heated by the heat provided by the heat storage tank 4, making the hydrogen production process more efficient, and can effectively save energy and efficiently utilize the heat generated by the system.

[0084] Furthermore, in this embodiment, the water electrolysis hydrogen production module is composed of one or more of an alkaline water electrolysis hydrogen production device, a proton exchange membrane water electrolysis hydrogen production device, an anion exchange membrane water electrolysis hydrogen production device, and a high-temperature solid oxide water electrolysis hydrogen production device.

[0085] Furthermore, in this embodiment, the organic liquid is a heterocyclic, carbazole or indole organic liquid, and the hydrogenation catalyst is a noble metal, supported metal or non-noble metal catalyst.

[0086] Furthermore, if Figure 2 As shown, in this embodiment, the organic liquid hydrogen regasification ship 14 includes:

[0087] The second organic liquid hydrogen-containing liquid tank 15 stores the hydrogenated organic liquid hydrogen carrier;

[0088] The organic liquid hydrogen-poor liquid tank 16 stores the dehydrogenated organic liquid hydrogen carrier;

[0089] The heat storage lean heat storage tank 17 stores heat storage materials that do not contain heat;

[0090] The heat storage tank 18 stores heat storage materials containing heat;

[0091] Organic liquid dehydrogenation system, which removes and purifies hydrogen from hydrogen-containing organic liquid;

[0092] Pumping system (including delivery pumps, pipes and valves, etc.) is used for transporting liquid materials.

[0093] Furthermore, if Figure 2As shown, in this embodiment, the floating water electrolysis flexible hydrogen production storage and transportation device 1 and the organic liquid hydrogen transport regasification ship 14 are moored by berthing or stern;

[0094] The hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material in the floating water electrolysis flexible hydrogen production device 1 are respectively transported from the first organic liquid hydrogen-containing liquid tank 12 and the heat storage tank 4 through flexible pipes or storage tanks to the second organic liquid hydrogen-containing liquid tank 15 and the heat storage heat storage tank 18 of the organic liquid regasification ship; the organic liquid hydrogen-poor carrier and heat storage-poor heat storage material in the organic liquid hydrogen transport regasification ship are respectively transported from the organic liquid hydrogen-poor liquid tank 16 and the heat storage-poor heat storage tank 17 through flexible pipes to the organic liquid hydrogen-poor liquid tank body 19 and the heat storage-poor heat storage tank body 20 in the floating water electrolysis flexible hydrogen production storage and transportation device.

[0095] According to the above solution of the present invention, the present invention can obtain the following beneficial effects:

[0096] Effective use of heat and energy self-sufficiency: Through technological innovation, the present invention realizes the effective use of the heat generated by the hydrogen production module when electrolyzing water to produce hydrogen, as well as the heat generated when hydrogen reacts with an organic liquid hydrogen carrier. Specifically, the generated heat is used on the one hand to heat the water source for hydrogen production to reduce the consumption of electric energy; on the other hand, the heat is converted into electric energy to supply the energy management module. In this way, even when the floating water electrolysis flexible hydrogen production, storage and transportation device is off-grid, the electric energy generated in the system can be distributed to the water source supply module and the hydrogen production module to ensure the continuity of the hydrogen production and storage operations, effectively improve the energy-saving and environmental protection performance, and significantly improve the energy utilization efficiency of the entire system.

[0097] Flexibility of offshore organic liquid hydrogen storage and transportation and loading and unloading system: The present invention proposes an offshore organic liquid hydrogen storage and transportation and loading and unloading system, which stores hydrogen-rich organic liquid in the liquid tanks of offshore floating production facilities, similar to the FPSO (Floating Production Storage and Offloading) used in offshore oil field development. The organic liquid storage tank can adopt the crude oil tank of the FPSO, and be regularly transported to the onshore terminal or the docked organic liquid hydrogen regasification ship FSRU (Floating Storage and Regasification Unit) by shuttle cruise ships. This design breaks the point-to-point operation mode of the organic liquid hydrogen storage device, realizes the flexible shore-based processing of organic liquid dehydrogenation, and is no longer limited to a specific wharf, thereby greatly improving the flexibility and economic benefits of the system.

[0098] According to the scheme of the present invention, the present invention can produce hydrogen, transmit the hydrogenated organic liquid hydrogen carrier and dehydrogenation gasification treatment through a floating water electrolysis flexible hydrogen production, storage and transportation device and an organic liquid hydrogen transport and regasification ship, and transmit the gasified hydrogen to a land hydrogen receiving terminal (hydrogen storage tank).

[0099] Furthermore, to achieve the above-mentioned purpose, the present invention also provides an offshore wind power hydrogen production storage and transportation method implemented by the above-mentioned off-grid large-scale offshore wind power floating hydrogen production storage and transportation system, comprising:

[0100] The acquired electrical energy is distributed to the water supply module and the hydrogen production module through the energy management module;

[0101] The water supply module provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module;

[0102] The hydrogen production module produces hydrogen by electrolyzing water according to the electric energy allocated by the energy management module and the water for electrolyzing water production provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with the organic liquid hydrogen carrier;

[0103] The hydrogenated organic liquid hydrogen carrier delivered by the hydrogen production module is received by an organic liquid hydrogen regasification ship, and then the hydrogenated organic liquid hydrogen carrier is transported to the destination, and then dehydrogenated and gasified and transported to a land hydrogen storage tank.

[0104] Furthermore, if Figure 3 As shown, in this embodiment, after the organic liquid hydrogen regasification ship 14 is loaded with hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material, it is transported to the land hydrogen storage tank 21 by its own power, and after the organic liquid is dehydrogenated and gasified on board, the purified hydrogen gas is transported to the land hydrogen storage tank 21.

[0105] Furthermore, if Figure 3 As shown, in this embodiment, the dehydrogenation process includes: the hydrogen-containing organic liquid in the second organic liquid hydrogen-containing tank 15 of the organic liquid hydrogen transport regasification ship 14 is transported to the organic liquid dehydrogenation system 22 by a pumping system, and hydrogen is removed after reacting with the dehydrogenation catalyst in the dehydrogenator, and the hydrogen is transported to the land hydrogen storage tank 21 after purification; the dehydrogenated organic liquid is stored in the organic liquid hydrogen-poor tank 16; the dehydrogenation process of the hydrogen-containing organic liquid is an endothermic reaction, and the heat is provided by the heat storage material in the heat storage tank 18 through heat exchange, and the heat storage material after heat exchange is stored in the heat storage tank 17. By repeating the organic liquid hydrogen storage and heat storage external transmission and transportation, and berthing dehydrogenation process, the floating water electrolysis flexible hydrogen production, storage and transportation device and the organic liquid hydrogen transport regasification ship can be used to realize large-scale offshore wind power hydrogen production and storage and transportation.

[0106] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A floating hydrogen production, storage and transportation system for off-grid large-scale offshore wind power, characterized in that: include: The floating water electrolysis flexible hydrogen production, storage and transportation device uses the electricity provided by the offshore wind farm to produce and store hydrogen; The organic liquid hydrogen transport regasification ship receives the hydrogenated organic liquid hydrogen carrier transported by the floating water electrolysis flexible hydrogen production storage and transportation device, and performs dehydrogenation and gasification treatment on the organic liquid hydrogen carrier; A hydrogen storage tank is arranged on land to receive the dehydrogenated hydrogen transported by the organic liquid hydrogen regasification ship; The floating water electrolysis flexible hydrogen production storage and transportation device comprises: The energy management module distributes the acquired electrical energy; A water supply module, which provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module; The hydrogen production module performs water electrolysis to produce hydrogen according to the electric energy allocated by the energy management module and the water for water electrolysis to produce hydrogen provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with an organic liquid hydrogen carrier.

2. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 1 is characterized in that: The floating water electrolysis flexible hydrogen production storage and transportation device also includes: The heat storage module receives and stores the heat generated by the hydrogen production module during the electrolysis of water to produce hydrogen and the heat generated during the hydrogenation of the organic liquid hydrogen carrier, and then supplies the stored heat to the water source supply module to heat the water used for the electrolysis of water to produce hydrogen and / or converts it into electrical energy to supply the energy management module.

3. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 2 is characterized in that: The heat storage module comprises: a heat collection and heat exchange module, a heat storage cabin and a thermoelectric conversion module; The heat collection and heat exchange module collects the heat generated by the hydrogen production module when producing hydrogen by electrolyzing water and the heat generated by hydrogenation of the organic liquid hydrogen carrier, and then transmits the collected heat to the heat storage cabin; The heat storage cabin receives the heat transmitted by the heat collection and heat exchange module, stores the heat in the form of sensible heat, latent heat or thermochemical heat storage, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module; The thermoelectric conversion module converts the heat transmitted by the heat storage compartment into electrical energy and supplies the electrical energy to the energy management module.

4. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 3 is characterized in that: The heat storage chamber is provided with heat storage material, and the heat storage chamber receives the heat transmitted by the heat collection and heat exchange module to heat the heat storage material to store heat, and then distributes the stored heat to the water supply module and / or the thermoelectric conversion module.

5. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 1 is characterized in that: The water supply module comprises: a seawater lifting module for transporting seawater and a seawater pretreatment module for receiving the transported seawater and filtering and desalinating the seawater.

6. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 1 is characterized in that: The hydrogen production module comprises: a rectification module, a water electrolysis hydrogen production module, a gas-liquid separation and purification module, an organic liquid hydrogenation module and a first organic liquid hydrogen-containing liquid tank; The rectifier module receives the electric energy distributed by the energy management module and converts the alternating current into direct current; The water electrolysis hydrogen production module receives the seawater pretreated by the seawater pretreatment module, and performs electrolysis hydrogen production on the treated seawater through the direct current rectified by the rectification module; The gas-liquid separation and purification module separates and purifies the hydrogen produced by the water electrolysis hydrogen production module from the liquid; The organic liquid hydrogenation module is provided with an organic liquid as a hydrogen carrier and a hydrogenation catalyst. The organic liquid is mixed with hydrogen to form a liquid which is then stored in the organic liquid hydrogen-containing liquid tank.

7. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 6 is characterized in that: The water electrolysis hydrogen production module is composed of one or more of an alkaline water electrolysis hydrogen production device, a proton exchange membrane water electrolysis hydrogen production device, an anion exchange membrane water electrolysis hydrogen production device, and a high-temperature solid oxide water electrolysis hydrogen production device.

8. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 6 is characterized in that: The organic liquid is a heterocyclic, carbazole or indole organic liquid, and the hydrogenation catalyst is a noble metal, supported metal or non-noble metal catalyst.

9. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 1 is characterized in that: The organic liquid hydrogen regasification ship comprises: The second organic liquid hydrogen-containing liquid tank stores the hydrogenated organic liquid hydrogen carrier; Organic liquid hydrogen-poor tank, storing the dehydrogenated organic liquid hydrogen carrier; Heat storage lean heat storage tank, storing heat storage materials that do not contain heat; The heat storage tank contains heat, and stores heat storage materials; Organic liquid dehydrogenation system, which removes and purifies hydrogen from hydrogen-containing organic liquid; Pumping systems for liquid material transportation.

10. The off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to claim 9, characterized in that: The floating water electrolysis flexible hydrogen production storage and transportation device and the organic liquid hydrogen transport regasification ship are moored by berthing or stern; The hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material in the floating water electrolysis flexible hydrogen production device are respectively transported from the first organic liquid hydrogen-containing liquid tank and the heat storage tank to the second organic liquid hydrogen-containing liquid tank and the heat storage tank of the organic liquid regasification ship through flexible pipelines or storage tanks; the organic liquid hydrogen-poor carrier and heat storage-poor heat material in the organic liquid hydrogen transport regasification ship are respectively transported from the organic liquid hydrogen-poor liquid tank and the heat storage-poor heat storage tank to the floating water electrolysis flexible hydrogen production and storage and transportation device through flexible pipelines.

11. An offshore wind power hydrogen production storage and transportation method implemented by an off-grid large-scale offshore wind power floating hydrogen production storage and transportation system according to any one of claims 1 to 10, characterized in that: include: The acquired electrical energy is distributed to the water supply module and the hydrogen production module through the energy management module; The water source supply module provides water for hydrogen production by electrolysis of water according to the electric energy allocated by the energy management module; The hydrogen production module performs water electrolysis to produce hydrogen according to the electric energy allocated by the energy management module and the water for water electrolysis to produce hydrogen provided by the water source supply module, and temporarily stores the produced hydrogen after reacting with an organic liquid hydrogen carrier; The organic liquid hydrogen regasification ship receives the hydrogenated organic liquid hydrogen carrier transported by the hydrogen production module, then transports it to the destination, dehydrogenates it, and finally transports it to the land hydrogen storage tank.

12. The offshore wind power hydrogen production, storage and transportation method according to claim 11, characterized in that: After the organic liquid hydrogen regasification ship is loaded with hydrogen-containing organic liquid hydrogen carrier and heat-containing heat storage material, it is transported to the land hydrogen storage tank by its own power, and after dehydrogenating and gasifying the organic liquid on board, the purified hydrogen gas is transported to the land hydrogen storage tank.

13. The offshore wind power hydrogen production, storage and transportation method according to claim 12, characterized in that: The dehydrogenation process comprises: the hydrogen-containing organic liquid in the second organic liquid hydrogen-containing liquid tank of the organic liquid hydrogen transport regasification ship is transported to the organic liquid dehydrogenation system by a pumping system, hydrogen is released after reacting with a dehydrogenation catalyst in the dehydrogenator, and the hydrogen is transported to a land hydrogen storage tank after purification; the dehydrogenated organic liquid is stored in an organic liquid hydrogen-poor liquid tank; the dehydrogenation process of the hydrogen-containing organic liquid is an endothermic reaction, heat is provided by the heat storage material in the heat storage tank through heat exchange, and the heat storage material after heat exchange is stored in the heat storage tank.

Images