Offshore hydrogen production, storage, filling and transportation system and method

Abstract

The offshore hydrogen production, storage, filling and transportation system comprises a first ship, a power generation device, an energy butt joint device, a first hydrogen production system, a second hydrogen production system and a central electric power system, the power generation device is arranged on the first ship and can generate power on the sea, and when the first ship runs to an offshore power plant, the energy butt joint device is connected with the energy butt joint device. The energy butt joint device can be in butt joint with an offshore power plant, the first hydrogen production system comprises a first hydrogen production device and a hydrogen energy power generation device, the first hydrogen production device can produce and store first hydrogen, and the hydrogen energy power generation device can convert the first hydrogen into electric energy and supply the electric energy to the first ship; the second hydrogen production system comprises a second hydrogen production device and an LOHC hydrogen storage device, the second hydrogen production device can produce second hydrogen, the LOHC hydrogen storage device can convert the second hydrogen into loaded LOHC for storage, and the system does not need to be provided with a fixed place, is good in maneuverability, does not need to be provided with a complex pipeline network and is low in construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field related to hydrogen production, and particularly relates to an offshore hydrogen production, storage, refueling and transportation system and method. Background Art

[0002] Currently, inventions in the field of offshore hydrogen production and storage mainly rely on fixed platforms or buoyancy structures moored to the seabed. In the prior art, these systems adopt technologies such as compressed hydrogen, cryogenic hydrogen or solid hydrogen storage, and are combined with offshore wind farms. Although these devices can effectively achieve local hydrogen production, they also face some problems, including the need to rely on fixed locations and complex undersea pipeline networks. This results in high construction and maintenance costs and limited scalability. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an offshore hydrogen production, storage, refueling and transportation system, which can solve the problems of high construction and maintenance costs and limited scalability.

[0004] An offshore hydrogen production, storage, refueling and transportation system according to an embodiment of the first aspect of the present invention includes: a first ship, a power generation device, an energy docking device, a first hydrogen production system, a second hydrogen production system and a central power system. The power generation device is provided on the first ship and can generate electricity at sea. The energy docking device is provided on the first ship. When the first ship sails to an offshore power generation field, the energy docking device can dock with the offshore power generation field to receive energy. The first hydrogen production system includes a first hydrogen production device and a hydrogen energy power generation device. The first hydrogen production device can produce and store first hydrogen. The hydrogen energy power generation device can convert the first hydrogen into electric energy and supply it to the first ship. The second hydrogen production system includes a second hydrogen production device and an LOHC hydrogen storage device. The second hydrogen production device can produce second hydrogen. The LOHC hydrogen storage device can convert the second hydrogen into loaded LOHC for storage. The central power system is provided on the first ship. The power generation device, the energy docking device, the first hydrogen production system and the second hydrogen production system are all connected to the central power system. When the first ship does not sail to the offshore power generation field, the central power system can supply the electric energy of the power generation device to the first ship and the first hydrogen production system. When the first ship docks with the offshore power generation field, the central power system can supply the electric energy of the power generation device and the offshore power generation field to the first ship and the second hydrogen production system.

[0005] The offshore hydrogen production, storage, refueling and transportation system according to the embodiments of the present invention has at least the following beneficial effects: The first ship is equipped with a power generation device, which can generate electricity during the journey to an offshore power plant to supply power for the operation of the first ship. The remaining electric energy can also be converted into hydrogen energy through the first hydrogen production system for storage and standby, which can achieve energy redundancy, facilitate the operation of the first ship, and the first ship can travel to different offshore power plants, with good mobility, and can be docked with the offshore power plant through an energy docking device. The power generation device and the offshore power plant jointly supply energy to the first ship and the second hydrogen production system. The second hydrogen production system can convert the produced second hydrogen into loaded LOHC through the LOHC hydrogen storage device, enabling it to be stored at normal temperature, safer and more convenient for transportation. Moreover, the above system does not require a fixed location, has good mobility, does not require a complex pipeline network, and has a low construction cost.

[0006] According to some embodiments of the present invention, it further includes an emergency energy storage device, which is arranged on the first ship and connected to the central power system. When the first ship does not travel to the offshore power plant, the central power system can supply the electric energy of the power generation device to the emergency energy storage device for storage. When the first ship travels to the offshore power plant, the central power system can supply the electric energy of the power generation device and the offshore power plant to the emergency energy storage device for storage, and the emergency energy storage device can also supply energy to the first ship.

[0007] According to some embodiments of the present invention, it further includes a refueling station, which is arranged on the first ship and connected to the LOHC hydrogen storage device. The refueling station can output the loaded LOHC to the outside and can receive the unloaded LOHC from the outside and supply it to the LOHC hydrogen storage device.

[0008] According to some embodiments of the present invention, the LOHC hydrogen storage device includes a hydrogenation reactor, an unloaded LOHC storage tank and a loaded LOHC storage tank. The hydrogenation reactor can convert the second hydrogen and the unloaded LOHC in the unloaded LOHC storage tank into loaded LOHC and store it in the loaded LOHC storage tank. Both the unloaded LOHC storage tank and the loaded LOHC storage tank are connected to the refueling station.

[0009] According to some embodiments of the present invention, it further includes a second ship, which can be docked with the refueling station, can transport the loaded LOHC in the loaded LOHC storage tank to the shore, and can also transport the unloaded LOHC to the refueling station to supply it to the unloaded LOHC storage tank.

[0010] According to some embodiments of the present invention, the first hydrogen production system further includes a first hydrogen storage device, which can store the first hydrogen produced by the first hydrogen production device. The second hydrogen production system includes a second hydrogen storage device, which can store the second hydrogen of the second hydrogen production device. The first hydrogen storage device and the second hydrogen storage device can exchange the first hydrogen and the second hydrogen with each other.

[0011] According to some embodiments of the present invention, the hydrogen energy power generation device includes a hydrogen fuel cell, which can convert the hydrogen in the first hydrogen storage device into electric energy and supply it to the first ship.

[0012] According to some embodiments of the present invention, the second hydrogen production device includes a second water purification system and a second electrolysis device. The second water purification system is provided with a second ozone processor, which can generate ozone and is used for water purification. The second electrolysis device can use the water supplied by the second water purification system to generate oxygen, and the oxygen can be supplied to the second ozone processor.

[0013] According to the method for offshore hydrogen production, storage, refueling and transportation according to the second aspect embodiments of the present invention, it includes using the above-mentioned offshore hydrogen production, storage, refueling and transportation system, and further includes Step 1: When the first ship sails towards the offshore power plant, the power generation device can generate electricity at sea, and the central power system can preferentially supply the electric energy of the power generation device to the operation of the first ship, and the remaining electric energy is supplied to the first hydrogen production device, and the first hydrogen production device can produce and store the first hydrogen; Step 2: When the power generation device cannot supply enough electric energy to the first ship, the hydrogen energy power generation device can use the stored first hydrogen to generate electricity and supply it to the operation of the first ship. Step 3: The first ship sails to the offshore power plant and docks using the energy docking device. The offshore power plant and the power generation device jointly supply energy to the first ship and the second hydrogen production system. The second hydrogen production device can produce the second hydrogen, and the LOHC hydrogen storage device can convert the second hydrogen into the loaded LOHC for storage; Step 4: The first ship can be transported to the coast, and the loaded LOHC in the LOHC hydrogen storage device can be unloaded, and the unloaded LOHC can be received for use by the LOHC hydrogen storage device; Step 5: The first ship sails to the sea and repeats Step 1.

[0014] The method for offshore hydrogen production, storage, refueling and transportation according to the embodiments of the present invention has at least the following beneficial effects: The first ship can generate electricity and travel on its own at sea, produce and store hydrogen. After docking with an offshore power plant, it can produce hydrogen through a second hydrogen production system and store it as loaded LOHC. The loaded and unloaded LOHC can be easily transported, without fixed location and pipeline restrictions, and can be used for the production, storage and transportation of hydrogen. It has mobility, scalability and onshore maintenance capabilities. It can withstand harsh marine environments, without the need for fixed offshore platforms, providing operational flexibility and reducing infrastructure costs. The emergency function device can provide redundant energy supply, with good operating stability and scalability.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a schematic diagram of the system during the travel of the first ship;

[0018] Figure 2 It is a schematic diagram of the system after the first ship docks with the offshore power plant;

[0019] Figure 3 It is a schematic diagram of the first hydrogen production system;

[0020] Figure 4 It is a schematic diagram of the second hydrogen production system;

[0021] Figure 5 It is a schematic diagram of the LOHC hydrogen storage device system;

[0022] Figure 6 It is a schematic diagram of the heat exchange system;

[0023] Figure 7 It is a flowchart of the method according to some embodiments of the present invention;

[0024] Reference Signs:

[0025] The first ship 100;

[0026] The first seawater desalination tank 210, the first buffer tank 220, the first water purification system 230, the first ozone processor 240, the first oxygen tank 250, the first electrolytic cell 260, the first hydrogen storage device 270, the hydrogen fuel cell 280, the fuel cell waste water tank 290;

[0027] The second seawater desalination tank 310, the second buffer tank 320, the second water purification system 330, the second ozone processor 340, the second oxygen tank 350, the second electrolytic cell 360, the second hydrogen storage device 370;

[0028] The hydrogenation reactor 410, the unloaded LOHC storage tank 420, the loaded LOHC storage tank 430;

[0029] The main heat exchanger 510, the first heat exchanger 520, the second heat exchanger 530, the hydrogenation heat exchanger 540;

[0030] The organic Rankine cycle device 600;

[0031] The emergency energy storage device 700. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Refer to Figures 1 to 7, an offshore hydrogen production, storage, refueling and transportation system according to an embodiment of the first aspect of the present invention includes a first ship 100, a power generation device, an energy docking device, a first hydrogen production system, a second hydrogen production system and a central power system. The power generation device is provided on the first ship 100 and can generate electricity at sea. The energy docking device is provided on the first ship 100. When the first ship 100 sails to an offshore power plant, the energy docking device can dock with the offshore power plant to receive energy. The first hydrogen production system includes a first hydrogen production device and a hydrogen energy power generation device. The first hydrogen production device can produce and store first hydrogen. The hydrogen energy power generation device can convert the first hydrogen into electrical energy and supply it to the first ship 100. The second hydrogen production system includes a second hydrogen production device and an LOHC hydrogen storage device. The second hydrogen production device can produce second hydrogen. The LOHC hydrogen storage device can convert the second hydrogen into loaded LOHC for storage. The central power system is provided on the first ship 100. The power generation device, the energy docking device, the first hydrogen production system and the second hydrogen production system are all connected to the central power system. When the first ship 100 does not sail to an offshore power plant, the central power system can supply the electrical energy of the power generation device to the first ship 100 and the first hydrogen production system. When the first ship 100 docks with the offshore power plant, the central power system can supply the electrical energy of the power generation device and the offshore power plant to the first ship 100 and the second hydrogen production system. The first ship 100 is equipped with a power generation device that can generate electricity during the journey to the offshore power plant to supply power for the operation of the first ship 100. The remaining electrical energy can also be converted into hydrogen energy and stored for standby through the first hydrogen production system, achieving energy redundancy and facilitating the operation of the first ship 100. Moreover, the first ship 100 can sail to different offshore power plants, has good mobility, and can dock with the offshore power plant through the energy docking device. The power generation device and the offshore power plant jointly supply energy to the first ship 100 and the second hydrogen production system. The second hydrogen production system can convert the produced second hydrogen into loaded LOHC through the LOHC hydrogen storage device, enabling it to be stored at normal temperature, being safer and more convenient for transportation. And the above system does not need to be set at a fixed location, has good mobility, does not need to set up a complex pipeline network, and has a low construction cost.

[0036] Specifically, LOHC refers to the Liquid Organic Hydrogen Carriers Technology (abbreviated as "LOHC"), which means using certain liquid organic compounds containing unsaturated carbon bonds such as olefins, alkynes, or aromatic hydrocarbons as hydrogen storage carriers, and realizing hydrogen storage and release through one-to-one reversible reactions. In short, the Liquid Organic Hydrogen Carrier (LOHC) is a liquid that can be reversibly hydrogenated and dehydrogenated. Before hydrogenation, it is the unloaded LOHC, and after hydrogenation, it is the loaded LOHC. By setting up the first hydrogen production system, the energy required for the first ship 100 to travel can be supplied, which is relatively clean. And the excess energy generated can be used by the first hydrogen production system to produce the first hydrogen, which can be stored to form standby hydrogen energy. When needed, it can be used to generate electricity through the hydrogen energy power generation device for the first ship 100 to use. It can store electricity when the power generation is sufficient and use it when the power generation is insufficient. When the first ship 100 is docked with the offshore power generation field through the energy docking device, the power generation device and the offshore power generation field can generate electricity simultaneously to supply the operation of the second hydrogen production system. At this time, the second hydrogen production system can produce the second hydrogen and convert the unloaded LOHC into the loaded LOHC for storage through the LOHC hydrogen storage device. It can be stored with a liquid as the carrier at normal temperature, which is safe and convenient for storage. The above power control is controlled by the central power system, which can switch the energy supply situation. And the first ship 100 can also travel to the coast to unload the loaded LOHC and receive the unloaded LOHC. The loading and unloading are flexible and convenient, without a fixed platform, with low construction costs, and can avoid bad weather at sea. The maintenance can also be carried out on shore.

[0037] Refer to Figure 1 、 Figure 2 and Figure 7 , in some embodiments of the present invention, it further includes an emergency energy storage device 700. The emergency energy storage device 700 is provided on the first ship 100 and connected to the central power system. When the first ship 100 has not traveled to the offshore power generation field, the central power system can supply the electric energy of the power generation device to the emergency energy storage device 700 for storage. When the first ship 100 travels to the offshore power generation field, the central power system can supply the electric energy of the power generation device and the offshore power generation field to the emergency energy storage device 700 for storage. The emergency energy storage device 700 can also supply energy to the first ship 100. Specifically, the emergency energy storage device 700 can be set as an energy storage battery, and the specific type of the energy storage battery is not limited. When there is surplus power in the power supplied by the power generation device for the operation of the first ship 100, this part of the electric energy can be stored in the energy storage battery, thereby forming an emergency power source. The emergency energy storage device can supply power to the first ship 100 in an emergency, achieving energy redundancy. When the energy storage battery is fully charged, it can supply the operation of the first hydrogen production system.

[0038] Refer toFigure 2 , in some embodiments of the present invention, it further includes a filling station, which is arranged on the first ship 100 and is connected to the LOHC hydrogen storage device. The filling station can output the loaded LOHC to the outside and can receive the unloaded LOHC from the outside and supply it to the LOHC hydrogen storage device. Specifically, the filling station can be arranged in the loading and unloading area of the first ship 100 to facilitate the exchange of LOHC by the first ship 100. It can be understood that when the first ship 100 sails to the coast, the loaded LOHC can be transported to the shore through the filling station, and the unloaded LOHC can be replenished from the shore to facilitate loading and unloading.

[0039] Refer to Figure 2 and Figure 5 , in some embodiments of the present invention, the LOHC hydrogen storage device includes a hydrogenation reactor 410, an unloaded LOHC storage tank and a loaded LOHC storage tank. The hydrogenation reactor can convert the second hydrogen and the unloaded LOHC in the unloaded LOHC storage tank into loaded LOHC and store it in the loaded LOHC storage tank. Both the unloaded LOHC storage tank and the loaded LOHC storage tank are connected to the filling station. Specifically, the hydrogenation reactor 410 can react hydrogen with unloaded LOHC to form loaded LOHC, the unloaded LOHC storage tank can supply unloaded LOHC to the hydrogenation reactor 410, the second hydrogen production device can provide the second hydrogen for the hydrogenation reactor 410, and the loaded LOHC storage tank can receive the loaded LOHC converted by the hydrogenation reactor 410 to achieve ambient temperature liquid storage.

[0040] Refer to Figure 2 , in some embodiments of the present invention, it further includes a second ship, which can be docked with the filling station, can transport the loaded LOHC in the loaded LOHC storage tank to the shore, and can also transport the unloaded LOHC to the filling station to supply it to the unloaded LOHC storage tank. Specifically, the second ship can be set as a transfer and transportation ship, so that the first ship 100 does not need to sail to the coast, thereby enabling continuous hydrogen production. The second ship can replenish the unloaded LOHC from the shore and sail to the first ship 100 to replenish the unloaded LOHC of the LOHC hydrogen storage device of the first ship 100. At the same time, it can also receive the loaded LOHC from the first ship 100 and then transport it to the shore for unloading. It can be understood that multiple second ships can be set, so as to continuously exchange raw materials and goods with low production costs.

[0041] It can be understood that the second ship can be powered by fuel, hydrogen energy, solar energy, or a combination of the above energy sources.

[0042] Refer to Figure 1 andFigure 2 , in some embodiments of the present invention, the first hydrogen production system further includes a first hydrogen storage device 270, and the first hydrogen storage device 270 can store the first hydrogen produced by the first hydrogen production device. The second hydrogen production system includes a second hydrogen storage device 370, and the second hydrogen storage device 370 can store the second hydrogen produced by the second hydrogen production device. The first hydrogen storage device 270 and the second hydrogen storage device 370 can exchange the first hydrogen and the second hydrogen. Specifically, the first hydrogen storage device 270 can store the first hydrogen. When the first ship 100 is in motion and the power generation of the power generation device is sufficient to make the first hydrogen abundant, the first hydrogen can be transported to the second hydrogen storage device 370 for the second hydrogen production system to produce the loaded LOHC. Similarly, when the first ship 100 returns to the coast and the energy is insufficient, the second hydrogen in the second hydrogen storage device 370 can be transported to the first hydrogen storage device 270 for the hydrogen energy power generation device to generate electricity. Hydrogen can be exchanged between them according to availability and demand to meet the usage requirements.

[0043] Refer to Figure 1 and Figure 2 , in some embodiments of the present invention, the hydrogen energy power generation device includes a hydrogen fuel cell 280, and the hydrogen fuel cell 280 can convert the hydrogen in the first hydrogen storage device 270 into electrical energy and supply it to the first ship 100.

[0044] Refer to Figure 4, in some embodiments of the present invention, the second hydrogen production device includes a second water purification system 330 and a second electrolysis device. The second water purification system 330 is provided with a second ozone processor 340. The second ozone processor 340 can generate ozone and is used for water purification. The second electrolysis device can generate oxygen by using the water supplied by the second water purification system 330, and the oxygen can be supplied to the second ozone processor 340. Specifically, the second water purification system 330 can also pass seawater or fuel cell wastewater through an ultraviolet sterilizer, a sand filter, and a fine filter in sequence, so as to remove the particles in the water. Then, it is further processed by the second ozone processor 340. The second ozone processor 340 can introduce ozone into the water flow through a Venturi valve to further sterilize the residual pollutants in the water flow. In the next step, desalination can be carried out through the reverse osmosis stage. Desalination can be performed by a reverse osmosis device, and the desalination situation is detected by a conductivity meter. Then, the desalted water is deionized by electrolysis to form ultrapure water for the electrolysis device to produce hydrogen. The electrolysis device includes a second electrolytic cell 360. A dedicated second heat exchanger 530 is connected in front of the second electrolytic cell 360. The second heat exchanger 530 is used to heat the purified water and preheat the purified water in front of the second electrolytic cell 360 to improve the electrolysis efficiency. The second electrolytic cell 360 can generate second hydrogen and oxygen. The second hydrogen is transported to the second hydrogen storage device 370 for storage, and the oxygen is transported to the second oxygen tank 350 for standby. The second hydrogen can be used for power generation of the hydrogen fuel cell 280 or LOHC storage, and the oxygen can be transported to the second ozone processor 340 for ozone production. The oxygen by-product generated by electrolysis can be fully utilized without additional oxygen production, and the cost is low.

[0045] An offshore hydrogen production, storage, refueling and transportation method according to an embodiment of the second aspect of the present invention includes using the above-mentioned offshore hydrogen production, storage, refueling and transportation system, and further includes Step 1: When the first ship 100 travels to an offshore power plant, the power generation device can generate electricity at sea, and the central power system can preferentially supply the electric energy of the power generation device to the operation of the first ship 100, and the remaining electric energy is supplied to the first hydrogen production device. The first hydrogen production device can produce and store the first hydrogen; Step 2: When the power generation device cannot supply enough electric energy to the first ship 100, the hydrogen energy power generation device can use the stored first hydrogen to generate electricity and supply it to the operation of the first ship 100. Step 3: The first ship 100 travels to the offshore power plant and docks using the energy docking device. The offshore power plant and the power generation device jointly supply energy to the first ship 100 and the second hydrogen production system. The second hydrogen production device can produce the second hydrogen, and the LOHC hydrogen storage device can convert the second hydrogen into the loaded LOHC for storage; Step 4: The first ship 100 can be transported to the coast, and the loaded LOHC in the LOHC hydrogen storage device can be unloaded, and the unloaded LOHC can be received for use by the LOHC hydrogen storage device; Step 5: The first ship 100 travels to the sea and repeats Step 1. Specifically, the first ship 100 can generate electricity and travel by itself at sea, produce and store hydrogen. After docking with the offshore power plant, it can produce hydrogen through the second hydrogen production system and store it as the loaded LOHC. The loaded and unloaded LOHC are convenient for transfer, without fixed location and pipeline restrictions, and can be used for the production, storage and transportation of hydrogen. It has mobility, scalability and onshore maintenance capabilities. It can withstand harsh marine environments, does not require a fixed offshore platform, provides operational flexibility and reduces infrastructure costs. The emergency function device can provide redundant energy supply, with good operating stability and scalability.

[0046] Refer to Figure 7, it should be noted that the following methods can also be adopted during the specific use process, including Step 1: When the first ship 100 sails towards the offshore power plant, the power generation device can generate electricity at sea. The central power system can supply the electric energy of the power generation device to the operation of the first ship 100 as the first priority, supply it to the emergency energy storage device 700 for storage as the second priority, and finally supply the remaining electric energy to the first hydrogen production system. The first hydrogen production device can produce and store the first hydrogen; Step 2: When the power generation device cannot supply enough electric energy to the first ship 100, the hydrogen energy power generation device can use the stored first hydrogen to generate electricity and supply it to the operation of the first ship 100, and the emergency energy storage device 700 can supply the stored electric energy to the operation of the first ship 100. Step 3: The first ship 100 sails to the offshore power plant and docks using the energy docking device. The offshore power plant and the power generation device supply energy to the operation of the first ship 100 as the first priority, supply it to the emergency energy storage device 700 for storage as the second priority, and the remaining electric energy is supplied to the second hydrogen production system; Step 4: The second hydrogen production device can produce the second hydrogen, and the first hydrogen produced by the first hydrogen production device can be supplied to the LOHC hydrogen storage device. The second hydrogen can be supplied to the hydrogen energy power generation device, and the LOHC hydrogen storage device can store the second hydrogen and / or convert the second hydrogen into the loaded LOHC; Step 5: The second ship can dock with the filling station, and can transport the loaded LOHC on the first ship 100 to the shore, and can transport the unloaded LOHC on the shore to the first ship 100. Step 6: The first ship 100 can also be transported to the coast. The filling station can unload the loaded LOHC in the LOHC hydrogen storage device and receive the unloaded LOHC for use by the LOHC hydrogen storage device; Step 7: The first ship 100 sails to the sea and repeats Step 1. Thus, the energy distribution can be made more reasonable.

[0047] It should be noted that, with reference to Figure 3, The first hydrogen production system includes a first seawater desalination tank 210, a first water purification system 230, a first buffer water tank, a first electrolyzer 260, a first oxygen tank 250, a first ozone processor 240, a first heat exchanger 520, a first hydrogen storage tank, a fuel cell, a fuel cell waste water tank 290, and the first heat exchanger 520. The first ship 100 can pre-store seawater pumped into the first seawater desalination tank 210, and the fuel cell waste water tank 290 also stores waste water. The first buffer water tank is connected to the first seawater desalination tank 210 and the fuel cell waste water tank 290, and can buffer the above-mentioned seawater and waste water for supply to the first water purification system 230. The first water purification system 230 is also treated by a series of equipment such as ultraviolet sterilization, sand filtration, fine filtration, and ozone disinfection, and then enters the first electrolyzer 260 for electrolysis to produce first hydrogen. The first hydrogen is stored in the first hydrogen storage tank, while oxygen is stored in the first oxygen tank 250 to supply the first ozone processor 240 to produce ozone and transport it back to the first water purification system 230 for sterilization. The first heat exchanger 520 is used to preheat the purified water supplied to the first electrolyzer 260.

[0048] It should be noted that with reference to Figure 4 , The second hydrogen production system includes a second seawater desalination tank 310, a second buffer water tank, a second water purification system 330, a second electrolyzer 360, a second oxygen tank 350, a second ozone processor 340, a second heat exchanger 530, and a second hydrogen storage device 370. The second seawater desalination tank 310 stores seawater. The second buffer tank 320 is simultaneously connected to the second seawater desalination tank 310 and the fuel cell waste water tank 290, and can buffer seawater and waste water and then supply it to the second water purification system 330. After being processed by the second water purification system 330, it is supplied to the second electrolyzer 360 for electrolysis to produce second hydrogen and store it in the second hydrogen storage device 370. Oxygen is transported to the second oxygen tank 350 for storage, and oxygen can also be transported to the second ozone processor 340 to produce ozone for use in the second water purification system 330. The second heat exchanger 530 is used to preheat the purified water of the second electrolyzer 360 for easy production.

[0049] It should be noted that with reference to Figure 5 , The LOHC hydrogen storage device includes a hydrogenation heat exchanger 540 and a hydrogenation device. The hydrogenation device includes a hydrogenation reactor 410, two large storage tanks or two buffer storage tanks. One of the storage tanks is an unloaded LOHC storage tank 420, and the other is a loaded LOHC storage tank. The second hydrogen storage device 370 transports hydrogen to the hydrogenation reactor 410, and the unloaded LOHC storage tank transports LOHC to the hydrogenation reactor 410. The hydrogenation reactor 410 converts the unloaded low-concentration hexahydrocarbide into a loaded low-concentration hexahydrocarbide through hydrogenation and imports it into the loaded LOHC storage tank. The hydrogenation heat exchanger 540 is used to supply heat to the hydrogenation reactor 410 to strengthen the hydrogenation process.

[0050] It should be noted that, with reference to Figure 6 , the first ship 100 further includes a main heat exchanger 510 and an organic Rankine cycle device 600. The main heat exchanger 510 is connected to the first electrolytic cell 260 and the second electrolytic cell 360, and is used to exchange the heat generated by the reactions of the two electrolytic cells. Then, it is connected to the first heat exchanger 520, the second heat exchanger 530, the hydrogenation heat exchanger 540 and the organic Rankine cycle device 600 to supply heat. The organic Rankine cycle device converts the remaining heat into electrical energy and transports it to the central power distribution system of the first ship 100 for distribution. Through the above heat exchange cooperation, the waste heat of each link can be fully utilized to preheat water or provide additional heat for the hydrogenation device, thereby reducing the overall energy consumption.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. Offshore hydrogen production, storage, filling and transportation system, characterized in that: include: first ship; a power generation device, provided on the first ship, the power generation device being capable of generating electricity at sea; An energy docking device is provided on the first ship, and when the first ship runs to the offshore power plant, the energy docking device can dock energy with the offshore power plant; A first hydrogen production system, comprising a first hydrogen production device and a hydrogen power generation device, wherein the first hydrogen production device is capable of producing and storing first hydrogen, and the hydrogen power generation device is capable of converting the first hydrogen into electrical energy and supplying the electrical energy to the first ship; A second hydrogen production system, comprising a second hydrogen production device and a LOHC hydrogen storage device, wherein the second hydrogen production device is capable of producing a second hydrogen gas, and the LOHC hydrogen storage device is capable of converting the second hydrogen gas into loaded LOHC storage; The central power system is installed on the first ship. The power generation device, the energy docking device, the first hydrogen production system and the second hydrogen production system are all connected to the central power system. When the first ship does not run to the offshore power plant, the central power system can supply the electric energy of the power generation device to the first ship and the first hydrogen production system. When the first ship is docked with the offshore power plant, the central power system can supply the electric energy of the power generation device and the offshore power plant to the first ship and the second hydrogen production system.

2. The offshore hydrogen production, storage, filling and transportation system according to claim 1, characterized in that: It also includes an emergency energy storage device, which is arranged on the first ship and connected to the central power system. When the first ship has not sailed to the offshore power plant, the central power system can supply the electric energy of the power generation device to the emergency energy storage device for storage. When the first ship sails to the offshore power plant, the central power system can supply the electric energy of the power generation device and the offshore power plant to the emergency energy storage device for storage. The emergency energy storage device can also supply energy to the first ship.

3. The offshore hydrogen production, storage, filling and transportation system according to claim 1 is characterized in that: It also includes a filling station, which is arranged on the first ship and connected to the LOHC hydrogen storage device. The filling station can output the loaded LOHC to the outside and can receive external unloaded LOHC to supply to the LOHC hydrogen storage device.

4. The offshore hydrogen production, storage, filling and transportation system according to claim 3 is characterized in that: The LOHC hydrogen storage device includes a hydrogenation reactor, an unloaded LOHC storage tank and a loaded LOHC storage tank. The hydrogenation reactor can convert the second hydrogen and the unloaded LOHC in the unloaded LOHC storage tank into a loaded LOHC and store it in the loaded LOHC storage tank. The unloaded LOHC storage tank and the loaded LOHC storage tank are both connected to the filling station.

5. The offshore hydrogen production, storage, filling and transportation system according to claim 4, characterized in that: Also included is a second vessel, which is capable of docking with the filling station and transporting the loaded LOHC in the loaded LOHC tank to shore, and also capable of transporting unloaded LOHC to the filling station to supply to the unloaded LOHC tank.

6. The offshore hydrogen production, storage, filling and transportation system according to claim 1, characterized in that: The first hydrogen production system also includes a first hydrogen storage device, which can store the first hydrogen produced by the first hydrogen production device. The second hydrogen production system includes a second hydrogen storage device, which can store the second hydrogen produced by the second hydrogen production device. The first hydrogen storage device and the second hydrogen storage device can exchange the first hydrogen and the second hydrogen.

7. The offshore hydrogen production, storage, filling and transportation system according to claim 1, characterized in that: The hydrogen power generation device includes a hydrogen fuel cell, which can convert the hydrogen in the first hydrogen storage tank into electrical energy and supply the electrical energy to the first ship.

8. The offshore hydrogen production, storage, filling and transportation system according to claim 1, characterized in that: The second hydrogen production device includes a second water purification system and a second electrolysis device. The second water purification system is provided with a second ozone processor, which can generate ozone and be used for water purification. The second electrolysis device can use the water supplied by the second water purification system to generate oxygen, and the oxygen can be supplied to the second ozone processor.

9. A method for offshore hydrogen production, storage, filling and transportation, characterized in that: The offshore hydrogen production, storage, filling and transportation system according to any one of claims 1 to 8 further comprises step 1: when the first ship is traveling to the offshore power plant, the power generation device can generate electricity at sea, the central power system can supply the power of the power generation device to the first ship first, and the remaining power is supplied to the first hydrogen production device, and the first hydrogen production device can produce and store first hydrogen; Step 2: When the power generation device cannot supply sufficient electric energy to the first ship, the hydrogen power generation device can use the stored first hydrogen to generate electricity and supply it to the first ship for operation. Step 3: The first ship travels to the offshore power plant and docks with the first ship using an energy docking device. The offshore power plant and the power generation device jointly supply energy to the first ship and the second hydrogen production system. The second hydrogen production device can produce second hydrogen, and the LOHC hydrogen storage device can convert the second hydrogen into loaded LOHC storage. Step 4: The first ship is capable of transporting to the coast, and is capable of unloading the LOHC loaded in the LOHC hydrogen storage device, and receiving the unloaded LOHC for use in the LOHC hydrogen storage device; Step 5: The first ship sails to the sea and repeats step 1.

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