Offshore multifunctional hydrogen supply system

Abstract

The utility model discloses an offshore multifunctional hydrogen replenishment system, the offshore multifunctional hydrogen replenishment system comprises: an offshore wind power system, a power supply and distribution system, a sea water desalination system, a hydrogen production system, a hydrogen storage system and a filling system, the offshore wind power system is connected with each power utilization system through the power supply and distribution system to complete power supply to the power utilization systems; the seawater desalination system is connected with the hydrogen production system, and the seawater desalination system is configured to complete seawater desalination and convey the desalinated seawater as raw material water to the hydrogen production system; the hydrogen production system is connected with the hydrogen storage system, and the hydrogen production system is configured to complete hydrogen preparation based on raw material water and input the prepared hydrogen into the hydrogen storage system for storage; and the hydrogen storage system is connected with the filling system and is used for realizing external filling of hydrogen. The system provided by the utility model can provide hydrogen fuel supply for hydrogen energy ships on the sea, avoids long-distance transportation of hydrogen, and also solves the problem of consumption of offshore wind power.

Description

Technical Field

[0001] The utility model belongs to the field of hydrogen energy, and in particular relates to a multifunctional offshore hydrogen supply system. Background Art

[0002] Hydrogen is a clean and pollution-free energy source. Relying on fuel cells, it can achieve efficient conversion of chemical energy into electrical energy and is widely regarded as an ideal energy storage medium. Compared with traditional energy storage, water electrolysis emphasizes the one-way conversion of electrical energy into hydrogen energy, and subsequent consumption based on gas application terminals is almost unconstrained by energy limits. Therefore, water electrolysis is an effective solution for large-scale and efficient integration and utilization of surplus electricity from new energy sources.

[0003] With the vigorous promotion of hydrogen energy and the continuous breakthroughs in fuel cell technology, hydrogen fuel cell vehicles have ushered in rapid development. Hydrogen-powered vehicles have been promoted in many fields, from passenger cars to heavy trucks, and hydrogen-powered ships have also been piloted in many projects. Under the general trend of energy conservation and emission reduction, traditional fossil energy ships will gradually be eliminated. Compared with electric ships, hydrogen-powered ships have longer cruising range and faster energy replenishment rate, and their use scenarios are more abundant. Their advantages will be more obvious in the marine environment.

[0004] At present, wind power is the main renewable energy source at sea in China, but due to the fluctuation of wind power, the situation of wind power abandonment still exists. At the same time, the electricity generated by offshore wind turbines far away in the deep sea is used in inland areas, and the transmission will face high cable investment and a large amount of transmission loss.

[0005] In recent years, the technology of hydrogen production by water electrolysis has gradually matured. It has become possible to use water electrolysis hydrogen production technology and electrochemical energy storage technology to effectively absorb the fluctuation of wind power, and to directly use wind power to produce hydrogen on site at sea. At the same time, the transportation cost of the produced hydrogen from sea to land needs to be broken through. Whether it is transported by pipeline or ship, it will bring high storage and transportation costs, which is not conducive to the use and promotion of hydrogen energy. Utility Model Content

[0006] The purpose of the utility model is to overcome the problems of the prior art and disclose a multifunctional offshore hydrogen supply system. The novel system can provide hydrogen fuel supply for hydrogen-powered ships at sea, avoid long-distance transportation of hydrogen, and solve the problem of offshore wind power consumption.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A multifunctional offshore hydrogen supply system, comprising: an offshore wind power system, a power supply and distribution system, a seawater desalination system, a hydrogen production system, a hydrogen storage system, and a filling system.

[0009] The offshore wind power system is connected to each power system via the power supply and distribution system to supply power to the power system;

[0010] The seawater desalination system is connected to the hydrogen production system, and the seawater desalination system is configured to complete seawater desalination and transport the desalinated seawater as raw water to the hydrogen production system;

[0011] The hydrogen production system is connected to the hydrogen storage system, and the hydrogen production system is configured to complete hydrogen production based on raw water and input the produced hydrogen into the hydrogen storage system for storage;

[0012] The hydrogen storage system is connected to the filling system to realize external filling of hydrogen.

[0013] According to a preferred embodiment, a boosting system is further provided between the hydrogen storage system and the filling system, and the boosting system is used to complete the pressurization process of the output hydrogen.

[0014] According to a preferred embodiment, the offshore multifunctional hydrogen supply system further comprises: a thermal management system, one end of which is connected to a seawater desalination system to receive desalinated water generated by the seawater desalination system;

[0015] The other end of the thermal management system is connected to the hydrogen production system, the hydrogen storage system and the boosting system through circulation pipelines to provide the required cooling water or heating water for the hydrogen production system, the hydrogen storage system and the boosting system.

[0016] According to a preferred embodiment, the thermal management system is provided with a refrigeration device and a heating device to complete the refrigeration or heating of the corresponding circulating water, and the circulating water is transported to the corresponding destination system via a circulating water pump.

[0017] According to a preferred embodiment, the offshore multifunctional hydrogen supply system further includes: a public auxiliary system, which includes fire-fighting equipment, desalination and fresh air equipment, and monitoring equipment arranged next to each functional system.

[0018] According to a preferred embodiment, the offshore multifunctional hydrogen supply system further comprises: a control system, wherein the control system is configured to complete the operation monitoring and control of each subsystem in the offshore multifunctional hydrogen supply system.

[0019] According to a preferred embodiment, the offshore wind power system is composed of a plurality of offshore wind turbine generator sets.

[0020] According to a preferred embodiment, the power supply and distribution system includes a transformer, a rectifier and a power storage device.

[0021] According to a preferred embodiment, the seawater desalination system includes a filtering device, a desalination device, and a pure water tank equipment.

[0022] According to a preferred embodiment, the hydrogen production system includes an electrolyzer, a cooler, and a purification device.

[0023] The above-mentioned main scheme of the utility model and its further optional schemes can be freely combined to form multiple schemes, all of which are schemes that can be adopted and claimed for protection by the utility model. After understanding the scheme of the utility model, those skilled in the art can understand that there are many combinations based on the existing technology and common knowledge, all of which are technical schemes to be protected by the utility model, and they are not exhaustively listed here.

[0024] The working process of the utility model system is as follows: the offshore wind power system converts wind energy into electrical energy, and provides electricity to the entire system through the power supply and distribution system 2. The control system provides control signals for the entire system. After the seawater is purified by the seawater desalination system, it enters the electrolytic water hydrogen production system as a raw material and is decomposed into hydrogen and oxygen. The oxygen is exhausted, and the hydrogen enters the hydrogen storage system for storage. When there is a need for hydrogenation again, the hydrogen in the hydrogen storage system enters the boosting system, and after being boosted to an appropriate pressure, the hydrogen-powered ship is refilled with hydrogen by the filling system.

[0025] The offshore wind power system, power supply and distribution system, public auxiliary system and control system of the utility model system are all operated in real time. The seawater desalination system purifies the seawater and stores it in a pure water tank, monitors the liquid level signal in the water tank, and controls the start and stop of the seawater desalination system to ensure that the pure water level in the pure water tank is always in a reasonable range.

[0026] The operating conditions of the hydrogen production system, hydrogen storage system, pressurization system, filling system and thermal management system are mainly divided into the following four types: windy but no ship for filling, windy but with ship for filling, no wind but with ship for filling, and no wind but no ship for filling.

[0027] When there is wind but no ship is being refueled, the system power is provided by the wind turbine. The main operating subsystems are the hydrogen production system, hydrogen storage system and thermal management system. The pure water in the pure water tank enters the hydrogen production system as raw material, and the generated hydrogen enters the hydrogen storage system for storage. The heat generated by the system operation is taken away by the circulating cooling water and cooled by the closed cooling tower. Under this condition, if the hydrogen in the hydrogen storage system is full, the power of the hydrogen production system is gradually adjusted according to the hydrogen storage efficiency until the hydrogen production and related auxiliary systems in the system are shut down after it is full. At this time, the electrochemical energy storage is fully charged, and the main equipment in the system is in a closed state.

[0028] When there is wind and there is a ship to refuel, the hydrogen production system, hydrogen storage system, pressurization system, refueling system and thermal management system are all in operation. While producing hydrogen, hydrogen refueling is provided for hydrogen-powered ships.

[0029] When there is no wind and there is a ship to refuel, the system power is provided by the electrochemical energy storage device. At this time, the hydrogen production system in the system is not started, and the hydrogen refueling comes entirely from the hydrogen stored in the hydrogen storage system. The hydrogen ship is refueled with hydrogen through the boosting system and the refueling system until the hydrogen ship is refueled with hydrogen or the hydrogen in the hydrogen storage system is completely released.

[0030] When there is no wind or no ship for refueling, the system maintains the lowest power consumption, and the power is provided by the electrochemical energy storage device. The main equipment is in a shut-down state, and only a small number of equipment in the control system, safety monitoring and other auxiliary systems are kept running, so that the system can respond quickly when there is a need for refueling or when the wind comes.

[0031] Beneficial effects of the utility model:

[0032] This utility model offshore multifunctional hydrogen supply system can solve the problem of offshore wind power abandonment and alleviate the problem of power loss in long-distance power transmission. At the same time, as an infrastructure for hydrogenation and water replenishment, it is also conducive to the promotion and application of hydrogen-powered ships. Compared with traditional hydrogen fuel supply systems, it has the following advantages:

[0033] 1. It is possible to refuel and replenish fresh water for hydrogen-powered ships on site at sea. This patent stores the produced hydrogen at a high density, and when a ship needs to be refueled, it can supply high-pressure hydrogen to the hydrogen-powered ship on site. At the same time, the pure water produced by the system can also provide emergency water for passing ships.

[0034] 2. Solve the problem of wind power abandonment at sea and alleviate the problem of power loss in long-distance transmission. This patent combines water electrolysis hydrogen production technology with electrochemical energy storage technology to effectively absorb wind power fluctuations, reduce power loss in long-distance transmission, and efficiently convert wind energy into hydrogen energy on site, which can effectively reduce the electricity cost of hydrogen and improve the absorption level of offshore wind power.

[0035] 3. Solve the cost problem of offshore wind power hydrogen production and long-distance transportation of hydrogen. This patent uses the method of on-site hydrogen production and hydrogenation at sea to consume the hydrogen produced by wind power on-site, avoiding the high cost of transporting hydrogen to land over long distances, which is conducive to the promotion of hydrogen energy.

[0036] 4. The operating logic can be adjusted in real time according to the characteristics of wind power generation and hydrogen filling requirements to achieve unmanned and unattended operation of the system. This patented system can adjust the operating logic in real time according to the output conditions of wind power, hydrogen reserves and hydrogen filling conditions, and perform redundant safety design for each key valve and equipment. By switching the preset operating program, the system will not be paralyzed due to sudden situations, thereby achieving automated unmanned and unattended operation of the system.

[0037] 5. The utility model multifunctional hydrogen supply system at sea is used as a comprehensive supply station. It can provide fuel supply for hydrogen-powered ships at sea and also provide emergency fresh water supply. When a passing ship encounters danger, it can also serve as a temporary sea refuge for the crew, facilitating subsequent rescue operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the principle structure of the utility model marine multifunctional hydrogen supply system;

[0039] Figure 2 This is a schematic diagram of the principle structure of the multifunctional offshore hydrogen supply system according to an embodiment of the utility model;

[0040] Figure 3 This is a schematic diagram of the structural design of the multifunctional offshore hydrogen supply system according to an embodiment of the utility model;

[0041] Among them, 1-offshore wind power system, 2-power supply and distribution system, 3-seawater desalination system, 4-hydrogen production system, 5-hydrogen storage system, 6-pressurization system, 7-filling system, 8-thermal management system, 9-public auxiliary system, 10-control system. DETAILED DESCRIPTION

[0042] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the present utility model should point out that, in the present utility model, if the specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written out, the structure, connection relationship, position relationship, power source relationship, etc. involved in the present utility model are all known by technical personnel in this field on the basis of existing technology without creative work.

[0048] refer to Figure 1 As shown, the utility model discloses an offshore multifunctional hydrogen supply system, which comprises: an offshore wind power system 1, a power supply and distribution system 2, a seawater desalination system 3, a hydrogen production system 4, a hydrogen storage system 5, and a filling system 7.

[0049] Among them, the offshore wind power system 1 is connected to each power consumption system through the power supply and distribution system 2 to complete the power supply to the power consumption system; the seawater desalination system 3 is connected to the hydrogen production system 4, and the seawater desalination system 3 is configured to complete seawater desalination and transport the desalinated seawater as raw water to the hydrogen production system 4; the hydrogen production system 4 is connected to the hydrogen storage system 5, and the hydrogen production system 4 is configured to complete hydrogen preparation based on raw water, and input the prepared hydrogen into the hydrogen storage system 5 for storage; the hydrogen storage system 5 is connected to the filling system 7 for realizing the external filling of hydrogen.

[0050] Preferably, a boosting system 6 is provided between the hydrogen storage system 5 and the filling system 7, and the boosting system 6 is used to complete the pressurization process of the output hydrogen.

[0051] Preferably, the offshore multifunctional hydrogen supply system also includes: a thermal management system 8, one end of which is connected to the seawater desalination system 3 to receive desalinated water produced by the seawater desalination system 3; the other end of the thermal management system 8 is connected to the hydrogen production system 4, the hydrogen storage system 5 and the boosting system 6 through a circulation pipeline, respectively, to provide the required cooling water or heating water for the hydrogen production system 4, the hydrogen storage system 5 and the boosting system 6.

[0052] Furthermore, the thermal management system 8 is provided with a refrigeration device and a heating device to complete the refrigeration or heating of the corresponding circulating water, and transport the circulating water to the corresponding destination system through a circulating water pump.

[0053] Preferably, the offshore multifunctional hydrogen supply system further comprises: a public auxiliary system 9, wherein the public auxiliary system 9 comprises fire-fighting equipment, desalination and fresh air equipment and monitoring equipment arranged beside each functional system.

[0054] Preferably, the offshore multifunctional hydrogen supply system further comprises: a control system 10, wherein the control system 10 is configured to complete the operation monitoring and control of each subsystem in the offshore multifunctional hydrogen supply system.

[0055] Preferably, the offshore wind power system 1 is composed of a plurality of offshore wind turbine generator sets. The offshore wind power system 1 can use a variety of floating wind turbine platform forms such as semi-submersible type and column type, and use seabed anchor chains to fix the wind turbines.

[0056] The power supply and distribution system 2 includes a transformer, a rectifier and an electric storage device. The seawater desalination system 3 includes a filtering device, a desalination device and a pure water tank device. The hydrogen production system 4 includes an electrolyzer, a cooler and a purification device. The hydrogen production system 4 can adopt one or a combination of multiple technical routes such as PEM, alkaline, solid oxide, etc. Considering the volatility of wind power and the compactness of the system space structure, PEM is preferred to produce hydrogen alone, followed by setting up a hydrogen production system in a proportional manner with PEM and other routes.

[0057] The working process of the system of the utility model is as follows: the offshore wind power system 1 converts wind energy into electrical energy, and provides electricity to the entire system through the power supply and distribution system 2. The control system 10 provides control signals for the entire system. The seawater is purified by the seawater desalination system 3 and then enters the electrolytic water hydrogen production system 4 as a raw material to be decomposed into hydrogen and oxygen. The oxygen is exhausted and the hydrogen enters the hydrogen storage system 5 for storage. When there is a need for hydrogenation, the hydrogen in the hydrogen storage system enters the boosting system 6, and after being boosted to an appropriate pressure, the hydrogen is refilled by the filling system 7 for hydrogen-powered ships.

[0058] Preferably, the hydrogen storage system can adopt one or more combinations of various hydrogen storage methods such as high-pressure gaseous hydrogen storage, solid alloy hydrogen storage, low-temperature liquid hydrogen storage, organic liquid hydrogen storage, etc. Considering the needs of rapid hydrogen storage and release of the system and the compact spatial structure of the hydrogen storage system, high-pressure gaseous hydrogen storage and statically pressurized solid alloy hydrogen storage are preferred.

[0059] The offshore wind power system 1, power supply and distribution system 2, public auxiliary system 9 and control system 10 of the utility model system are all operated in real time. The seawater desalination system 3 purifies the seawater and stores it in the pure water tank, monitors the liquid level signal in the water tank, and controls the start and stop of the seawater desalination system to ensure that the pure water level in the pure water tank is always in a reasonable range.

[0060] The operation conditions of the hydrogen production system 4, hydrogen storage system 5, pressurization system 6, filling system 7 and thermal management system 8 are mainly divided into the following four types: windy but no ship for filling, windy but with ship for filling, no wind but with ship for filling, and no wind but no ship for filling.

[0061] When there is wind but no ship is refueling, the system power is provided by the wind turbine. The main operating subsystems are the hydrogen production system 4, the hydrogen storage system 5 and the thermal management system 8. The pure water in the pure water tank enters the hydrogen production system 4 as a raw material, and the generated hydrogen enters the hydrogen storage system 5 for storage. The heat generated by the system operation is taken away by the circulating cooling water and cooled by a closed cooling tower. Under this working condition, if the hydrogen in the hydrogen storage system is full, the power of the hydrogen production system is gradually adjusted according to the hydrogen storage efficiency until the hydrogen production and related auxiliary systems in the system are shut down after it is full. At this time, the electrochemical energy storage is fully charged, and the main equipment in the system is in a closed state.

[0062] When there is wind and there is a ship to refuel, the hydrogen production system 4, hydrogen storage system 5, boosting system 6, refueling system 7 and thermal management system 8 are all in operation. While producing hydrogen, hydrogen refueling is provided for hydrogen-powered ships.

[0063] When there is no wind and there is a ship to refuel, the system power is provided by the electrochemical energy storage device. At this time, the hydrogen production system 4 in the system is not started, and the hydrogen refueling comes entirely from the hydrogen stored in the hydrogen storage system 5. The hydrogen ship is refueled with hydrogen through the boosting system 6 and the refueling system 7 until the hydrogen ship is refueled with hydrogen or the hydrogen in the hydrogen storage system 5 is completely released.

[0064] When there is no wind or no ship for refueling, the system maintains the lowest power consumption, and the power is provided by the electrochemical energy storage device. The main equipment is in a shut-down state, and only a small number of equipment in the control system, safety monitoring and other auxiliary systems are kept running, so that the system can respond quickly when there is a need for refueling or when the wind comes.

[0065] Example 1

[0066] refer to Figure 2 and Figure 3As shown, Example 1 designs an offshore multifunctional hydrogen supply system with a hydrogen filling capacity of 4000kg / d. The offshore multifunctional hydrogen supply system consists of an offshore wind power system 1, a power supply and distribution system 2, a seawater desalination system 3, a hydrogen production system 4, a hydrogen storage system 5, a pressurization system 6, a filling system 7, a thermal management system 8, a public auxiliary system 9, and a control system 10. Among them, the hydrogen production system is a PEM water electrolysis hydrogen production system; the hydrogen storage system 5 is a high-pressure gaseous hydrogen storage system.

[0067] The hydrogen production, storage and hydrogenation system of this embodiment is arranged on a floating offshore platform and inside the wind turbine tower. The offshore platform base adopts a steel structure and is fixed to the seabed by cables. The offshore platform is divided into 3 floors, with a total of 9 areas S1-S9. Among them, the interior of the 1st and 2nd floor platforms adopts a fully enclosed structure, and the S1 fresh air system is used to remove salt mist in the air for the 1st and 2nd floor platforms, slow down the corrosion of equipment pipelines, and extend the service life of major production equipment. The S10 area inside the wind turbine tower is mainly equipped with the wind turbine's power transformation and energy storage system. The carrier platform can adopt one or more combinations of various offshore platforms, various types of ships, offshore wind power buoy platforms and other methods.

[0068] The first layer of the platform: The S2 area is mainly equipped with power supply and distribution systems; the S3 area is mainly equipped with seawater desalination and water circulation systems; the S4 area is mainly equipped with control, monitoring and other systems.

[0069] The second floor of the platform: The S5 area is mainly equipped with a hydrogen production system; the S6 area is equipped with a hydrogen storage system; the S7 area is equipped with a hydrogen booster system. The second floor is the main production process layer, and the interior is an explosion-proof area. Explosion-proof walls are set between the second floor of the platform and the first and third floors.

[0070] The third layer of the platform: S8 area is the heat dissipation system; S9 area is the water storage and hydrogenation system. It mainly plays the role of system heat dissipation and external interaction - hydrogenation, water replenishment, and temporary shelter.

[0071] By arranging the various process systems in layers on the carrier, the equipment processes such as hydrogen production and storage that have explosion-proof grade requirements are arranged on the same layer, and explosion-proof walls are set up around them and between other layers, meeting the design and production specifications.

[0072] The offshore wind power system 1 is mainly composed of two floating wind turbines, which mainly include a wind turbine buoy foundation and a wind turbine connected to the buoy foundation. The buoy foundation is fixed to the seabed by cables. The wind turbine can convert wind energy into electrical energy and transmit the electrical energy through a 35kV AC cable. In this embodiment, the assembly scale of a single floating wind turbine is 10MW, and the system is equipped with 2 identical floating wind turbines, with an overall power generation scale of 20MW.

[0073] The power supply and distribution system 2 is mainly composed of a transformer module, a power supply and distribution module, and an energy storage module. It converts the high-voltage AC power transmitted by the offshore wind turbine into the DC power required by the hydrogen production system; and stores part of the power through a 4MW / 8MWh energy storage module to provide stable AC power for the rest of the equipment in the system. It can also serve as a backup power source for the system when there is no wind power input. At the same time, the energy storage module can quickly smooth out the volatility of wind power, allowing the system to provide a relatively stable power source for the PEM water electrolysis hydrogen production system. This system is set up in the S2 area on the first floor of the platform and the S10 area in the tower.

[0074] The desalination system 3 adopts the "media filtration + seawater reverse osmosis" solution, with a designed water conductivity of ≤1μS / cm and a designed water production capacity of 2t / h. The designed pure water tank volume is ~50m 3 In an emergency, the storage capacity alone can meet the living water needs of 20 people for 10 days, solving the physiological needs of emergency refugees at sea. While emergency refugees obtain precious fresh water resources on the platform, the fixed platform at sea can also provide shelter for refugees. In this system, the filtration-reverse osmosis system is set in the S3 area on the first floor of the platform, and the pure water tank is set in the S9 area on the top floor of the platform.

[0075] Hydrogen production system 4 adopts PEM water electrolysis hydrogen production solution, with a total hydrogen production scale of 2000Nm 3 / h, and can produce 4300kg of hydrogen in a single day of full load operation for 24 hours. The produced hydrogen enters the back-end pressurized hydrogen storage process after internal purification process, and the pressure of the purified hydrogen is ~1.5MPa. This system is set up in the S5 area on the second floor of the platform.

[0076] The high-pressure gaseous hydrogen storage system 5 adopts high-pressure gaseous hydrogen storage technology, mainly composed of 22MPa and 45MPa hydrogen storage bottle groups, with a total hydrogen storage capacity of ~1500kg, which can store the hydrogen produced by the hydrogen production system running at full load for 8h. This system is set up in the S6 area on the second floor of the platform.

[0077] The boosting system 6 uses a two-stage hydrogen compressor to boost the hydrogen. The first stage of boosting compresses the hydrogen pressure from the purified 1.5MPa to 22MPa, with a total compression capacity of 2000Nm 3 / h; two-stage boosting increases the hydrogen pressure from 20MPa to 45MPa, with a total compression capacity of 2000Nm 3 / h. This system is set up in the S7 area on the second floor of the platform.

[0078] The filling system 7 is mainly composed of hydrogen buffer tanks, sequential control panels, mass flow meters, hydrogenation guns and other equipment, with a designed hydrogen filling capacity of 4000kg / d. It can provide 20MPa hydrogen filling or 35MPa hydrogen filling for hydrogen-powered ships. The hydrogen filling interface is set at the edge of the platform and connected to the hydrogenation ship through a large-diameter hydrogenation hose. At the same time, the hydrogen source storage tank is switched by the sequential control panel to ensure a reasonable pressure difference, and the pre-cooled hydrogen is quickly filled to the required ship. This system is set in the S9 area on the third floor of the platform.

[0079] The thermal management system 8 is mainly composed of a cooling water tank, a closed cooling tower, a chiller, a circulating water pump, and corresponding circulating water pipeline instrument valves, etc. It can provide 10-15°C chilled water for hydrogen precooling for the filling system 7, and can also provide circulating cooling water for hydrogen production systems, hydrogen compressors and other equipment, with a circulating cooling water flow rate of ~30t / h. The water supply part of this system is set in the S3 area on the first floor of the platform, and the closed cooling tower is set in the S8 area on the third floor of the platform.

[0080] The public auxiliary system 9 is composed of auxiliary systems such as monitoring system, fire protection system, fresh air system, alarm system, etc., which provide guarantee for the safe operation of the system. The fresh air system is set in the S1 area of ​​the platform, and the other public auxiliary systems are set in the S4 area of ​​the first floor of the platform. In view of the operating conditions of high salt fog at sea, the main equipment is set inside the platform and accompanied by a fresh air system for air filtration. It can effectively improve the operating environment conditions of each device in the system, reduce the failure rate, and extend its service life, thereby reducing the high maintenance and rectification costs at sea and saving system operating costs.

[0081] The control system 10 is composed of one or more sets of programmable logic controllers, touch screens, control cables, etc., which can realize the control of the whole system and provide instructions for the operation, stop, parameter adjustment, etc. of the whole system. By monitoring the operation of each subsystem in the system, according to the preset control logic, the actions of each device valve in the system are controlled to realize the adjustment of the system. It is set in the S4 area on the first floor of the platform.

[0082] The seawater is filtered to remove impurities such as algae and enters the seawater desalination system. The seawater desalination system adopts a two-stage reverse osmosis solution, equipped with chemical cleaning devices, non-oxidizing bactericide devices, scale inhibitor devices, acid dosing devices, and alkali dosing devices. The conductivity of desalinated pure water is designed to be ≤1μS / cm. Concentrated water is treated and discharged through pipeline 3-4 according to specific project requirements, and pure water enters the pure water tank for storage and standby, and provides raw water for the PEM water electrolysis hydrogen production system through pipeline 3-1, provides water replenishment for the cooling water tank and chiller in the thermal management system through pipeline 3-2 and pipeline 3-3, and provides emergency fresh water replenishment for passing ships through pipeline 3-5.

[0083] Under the action of the raw water pump in the electrolytic water hydrogen production system, the pure water in the pure water tank enters the electrolytic water hydrogen production system through pipeline 3-1, enters the electrolyzer, and is electrolyzed to generate hydrogen and oxygen. Oxygen is collected or directly discharged as needed, and the exhaust pressure of hydrogen after purification is about 1.5MPa. Hydrogen enters the boosting system 6 through pipeline 4-1 for boosting, and after boosting to 22MPa and 45MPa, it is stored in the hydrogen storage system 5 through pipeline 6-1. When there is a need for hydrogen filling on passing ships, the hydrogen stored in the hydrogen storage system 5 can be directly filled through pipeline 5-1 to the hydrogenator; or the remaining hydrogen can be boosted by a compressor, and then the hydrogen can be transported to the hydrogenator through pipeline 6-2 for filling.

[0084] Since the hydrogen production system, booster system and refrigerator will generate a lot of waste heat, this system uses circulating cooling water for cooling. The circulating water in the cooling water tank enters the hydrogen production system through pipeline 8-1 under the action of circulating pump 1# for heat exchange cooling and then enters the mixing water tank; similarly, the circulating cooling water in pipeline 8-4 discharges the waste heat generated by the refrigerator into the mixing water tank. The circulating hot water in the mixing water tank enters the closed cooling tower through pipeline 8-5 under the action of circulating pump 2#, and returns to the cooling water tank after cooling.

[0085] When the system is started, the power supply and distribution system 2 and the control system 10 are first activated, which will provide power for the entire station and the control signal of the entire system. The second is the seawater desalination system 3, which first stores an appropriate amount of filtered seawater in the raw water tank, and then purifies the raw water and stores it in the pure water tank. The pure water tank then replenishes the purified water in the raw water tank, cooling water tank, mixing water tank, and refrigerator raw water tank of the hydrogen production system. After the pure water tank and each water tank in the system have stored an appropriate amount of purified water, the seawater desalination system is stopped. The seawater desalination system is operated and regulated according to the liquid level in the raw water tank and the pure water tank, and the system is replenished with water through appropriate continuous operation or interval operation. After that, the hydrogen production system and circulating pump 1# and circulating pump 2# are started, and the hydrogen production system 4 is started. After the hydrogen production is stable, the boosting system 6 is started to boost the produced hydrogen; and the boosted high-pressure hydrogen is stored in the high-pressure gaseous hydrogen storage system 5. When a hydrogen-powered ship needs to be refueled, the refueling system 7 and the pressurization system 6 are used to refuel the rear-end ship.

[0086] The liquid level measurement points in the system mainly include the raw water tank, pure water tank, refrigerator and mixing water tank.

[0087] The temperature measurement points mainly include the hydrogen outlet temperature and cooling water inlet and outlet temperatures of the hydrogen production system; the hydrogen inlet and outlet temperatures and cooling water inlet and outlet temperatures of the booster system; the chilled water temperature and return water temperature of the refrigerator; the water temperature in the mixing water tank; the circulating water inlet and outlet temperatures of the closed cooling tower; the water temperature of the cooling water tank; and the hydrogen temperature of the hydrogenator.

[0088] The pressure measurement points mainly include the water pressure after various circulation pumps in the system, the hydrogen pressure at the outlet of the hydrogen production system, before and after the booster system, and at the hydrogen filling machine outlet.

[0089] The hydrogen mass flow measurement points are mainly at the outlet of the hydrogen production system and inside the hydrogen refueling machine.

[0090] The control system 10 can monitor the operating status of the system in real time according to the above information, and automatically or manually adjust the operating parameters or start and stop of dynamic equipment such as water pumps, compressors, valves, etc. in the system according to the above information.

[0091] This utility model offshore multifunctional hydrogen supply system can solve the problem of offshore wind power abandonment and alleviate the problem of power loss in long-distance power transmission. At the same time, as an infrastructure for hydrogenation and water replenishment, it is also conducive to the promotion and application of hydrogen-powered ships. Compared with traditional hydrogen fuel supply systems, it has the following advantages:

[0092] 1. It is possible to refuel and replenish fresh water for hydrogen-powered ships on site at sea. This patent stores the produced hydrogen at a high density, and when a ship needs to be refueled, it can supply high-pressure hydrogen to the hydrogen-powered ship on site. At the same time, the pure water produced by the system can also provide emergency water for passing ships.

[0093] 2. Solve the problem of wind power abandonment at sea and alleviate the problem of power loss in long-distance transmission. This patent combines water electrolysis hydrogen production technology with electrochemical energy storage technology to effectively absorb wind power fluctuations, reduce power loss in long-distance transmission, and efficiently convert wind energy into hydrogen energy on site, which can effectively reduce the electricity cost of hydrogen and improve the absorption level of offshore wind power.

[0094] 3. Solve the cost problem of offshore wind power hydrogen production and long-distance transportation of hydrogen. This patent uses the method of on-site hydrogen production and hydrogenation at sea to consume the hydrogen produced by wind power on-site, avoiding the high cost of transporting hydrogen to land over long distances, which is conducive to the promotion of hydrogen energy.

[0095] 4. The operating logic can be adjusted in real time according to the characteristics of wind power generation and hydrogen filling requirements to achieve unmanned and unattended operation of the system. This patented system can adjust the operating logic in real time according to the output conditions of wind power, hydrogen reserves and hydrogen filling conditions, and perform redundant safety design for each key valve and equipment. By switching the preset operating program, the system will not be paralyzed due to sudden situations, thereby achieving automated unmanned and unattended operation of the system.

[0096] 5. The utility model multifunctional hydrogen supply system at sea is used as a comprehensive supply station. It can provide fuel supply for hydrogen-powered ships at sea and also provide emergency fresh water supply. When a passing ship encounters danger, it can also serve as a temporary sea refuge for the crew, facilitating subsequent rescue operations.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional offshore hydrogen supply system, characterized in that: The offshore multifunctional hydrogen supply system comprises: an offshore wind power system (1), a power supply and distribution system (2), a seawater desalination system (3), a hydrogen production system (4), a hydrogen storage system (5), and a filling system (7). The offshore wind power system (1) is connected to each power consumption system via the power supply and distribution system (2) to supply power to the power consumption system; The seawater desalination system (3) is connected to the hydrogen production system (4), and the seawater desalination system (3) is configured to complete seawater desalination and transport the desalinated seawater as raw water to the hydrogen production system (4); The hydrogen production system (4) is connected to the hydrogen storage system (5), and the hydrogen production system (4) is configured to complete hydrogen production based on raw water and input the produced hydrogen into the hydrogen storage system (5) for storage; The hydrogen storage system (5) is connected to the filling system (7) to realize external filling of hydrogen.

2. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: A pressurizing system (6) is also provided between the hydrogen storage system (5) and the filling system (7), and the pressurizing process of the output hydrogen is completed through the pressurizing system (6).

3. The multifunctional offshore hydrogen supply system according to claim 2, characterized in that: The offshore multifunctional hydrogen supply system further comprises: a thermal management system (8), One end of the thermal management system (8) is connected to the seawater desalination system (3) to receive desalinated water generated by the seawater desalination system (3); The other end of the thermal management system (8) is connected to the hydrogen production system (4), the hydrogen storage system (5) and the boosting system (6) via circulation pipelines, respectively, to provide the required cooling water or heating water for the hydrogen production system (4), the hydrogen storage system (5) and the boosting system (6).

4. The multifunctional offshore hydrogen supply system according to claim 3, characterized in that: The thermal management system (8) is provided with a refrigeration device and a heating device to complete the refrigeration or heating of the corresponding circulating water, and transports the circulating water to the corresponding destination system via a circulating water pump.

5. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The offshore multifunctional hydrogen supply system further comprises: a public auxiliary system (9), wherein the public auxiliary system (9) comprises fire-fighting equipment, desalination and fresh air equipment and monitoring equipment arranged beside each functional system.

6. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The offshore multifunctional hydrogen supply system further comprises: a control system (10), wherein the control system (10) is configured to complete operation monitoring and control of each subsystem in the offshore multifunctional hydrogen supply system.

7. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The offshore wind power system (1) is composed of a plurality of offshore wind turbine generator sets.

8. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The power supply and distribution system (2) comprises a transformer, a rectifier and a power storage device.

9. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The seawater desalination system (3) comprises a filtering device, a desalination device, and pure water tank equipment.

10. The multifunctional offshore hydrogen supply system according to claim 1, characterized in that: The hydrogen production system (4) comprises an electrolyzer, a cooler, and purification equipment.

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