A solid-state hydrogen storage system and method coupled with offshore wind power hydrogen production

Abstract

The application relates to the field of solid-state hydrogen storage technology and discloses a solid-state hydrogen storage system and method coupled with offshore wind power hydrogen production, which comprises a seawater electrolysis hydrogen production assembly, a hydrogen storage assembly, a reaction kettle, an alloy powder storage tank, a stirring and stabilizing assembly and a solid-state hydrogen storage material storage tank; the seawater electrolysis hydrogen production assembly is connected with the hydrogen storage assembly; the top of the reaction kettle is provided with a first inlet and a second inlet; the first inlet is connected with the hydrogen storage assembly; the second inlet is connected with the alloy powder storage tank; the reaction kettle is connected with the stirring and stabilizing assembly; the stirring and stabilizing assembly is connected with the solid-state hydrogen storage material storage tank; and all the assemblies cooperatively constitute a complete solid-state hydrogen storage system; the structure completely discards the high-strength, large-volume hydrogen storage container and the strict sealing and detection system required by the high-pressure gaseous hydrogen storage technology commonly used in the existing offshore platform, and fundamentally solves the problems of high cost and high process complexity of the existing high-pressure gaseous hydrogen storage equipment.

Description

Technical Field

[0001] This invention relates to the field of solid-state hydrogen storage technology, specifically to a solid-state hydrogen storage system and method coupled with offshore wind power hydrogen production. Background Technology

[0002] In recent years, offshore wind power hydrogen production technology has developed rapidly. This technology can produce high-purity hydrogen energy using low-quality offshore wind power, which can significantly reduce the power transmission cost of deep-sea wind power and effectively solve the problems of large-scale consumption and long-term energy storage of offshore wind power. It has outstanding advantages in terms of economics and application cycle.

[0003] Currently, high-pressure gaseous hydrogen storage technology is commonly used on offshore platforms. This technology requires high-strength, large-volume hydrogen storage containers, as well as a stringent sealing and testing system, which significantly increases the cost and complexity of hydrogen storage equipment.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a solid-state hydrogen storage system and method coupled with offshore wind power hydrogen production, aiming to solve the problem that the existing offshore platforms generally adopt high-pressure gaseous hydrogen storage technology, which greatly increases the cost of hydrogen storage equipment and process complexity.

[0006] The technical solution adopted by this invention to solve the technical problem is as follows: A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production includes a seawater electrolysis hydrogen production unit for producing hydrogen, and further includes: A hydrogen storage component, connected to the seawater electrolysis hydrogen production component, is used to store the electrolyzed hydrogen. The reactor has a first inlet and a second inlet at the top; the hydrogen storage assembly is connected to the first inlet to inject hydrogen into the reactor. An alloy powder storage tank is used to store alloy powder; the alloy powder storage tank is connected to the second inlet to inject alloy powder into the reaction vessel and react with hydrogen gas to form metal hydride; A stirring and stabilizing assembly is disposed on one side of the reactor; the reactor is connected to the stirring and stabilizing assembly to transfer the metal hydride in the reactor into the stirring and stabilizing assembly; A solid hydrogen storage tank, connected to the stirring and stabilizing assembly, is used to store the stirred and stabilized metal hydride.

[0007] Furthermore, the stirring stabilizing component includes: A stirrer is disposed on one side of the reaction vessel; the reaction vessel is connected to the stirrer and is used to transfer metal hydrides into the stirrer. A coating material injection pipe is located at the top of the agitator and connects to the interior of the agitator for injecting coating material into the interior of the agitator.

[0008] Furthermore, an air venting pump is installed at the top of the reactor, and the air venting pump is connected to the interior of the reactor via a pipeline.

[0009] Furthermore, an emergency vent valve is installed at the top of the reactor, and the emergency vent valve is connected to the interior of the reactor via a pipeline.

[0010] Furthermore, the hydrogen storage component includes: A cooler, the inlet of which is connected to the outlet of the seawater electrolysis hydrogen production assembly, is used to cool the electrolyzed hydrogen. A hydrogen buffer tank, the inlet of which is connected to the outlet of the cooler; A hydrogen booster pump, the inlet of which is connected to the outlet of the hydrogen buffer tank; The hydrogen high-pressure buffer tank has its inlet connected to the outlet of the hydrogen booster pump; the outlet of the hydrogen high-pressure buffer tank is connected to the interior of the reactor via a pipeline.

[0011] Furthermore, control valves are installed at the outlets of the cooler, the hydrogen buffer tank, and the hydrogen booster pump.

[0012] Furthermore, a pressure sensor is installed inside the reaction vessel, and the pressure sensor is connected to an external display component.

[0013] Furthermore, the alloy powder is a calcium-magnesium alloy powder.

[0014] Furthermore, the coating material is polyethylene glycol 1000.

[0015] A solid-state hydrogen storage method coupled with offshore wind power hydrogen production, based on the aforementioned solid-state hydrogen storage system coupled with offshore wind power hydrogen production, includes: The hydrogen storage component stores the hydrogen produced by the seawater electrolysis hydrogen production component. The hydrogen gas electrolyzed in the hydrogen storage component and the alloy powder in the alloy powder storage tank are injected into the reactor, and the reactor is started. After the alloy powder has reacted with the hydrogen, the reacted metal hydride is transferred into the stirring and stabilizing assembly and stirred and coated. After the stirring and coating are completed, the coated metal hydride is transported to the solid hydrogen storage material storage tank through a closed discharge channel to complete the solid hydrogen storage work.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the seawater electrolysis hydrogen production unit is connected to the hydrogen storage unit. The top of the reactor is equipped with a first inlet and a second inlet. The first inlet is connected to the hydrogen storage unit, and the second inlet is connected to the alloy powder storage tank. The reactor is connected to the stirring and stabilizing unit, which is connected to the solid hydrogen storage material storage tank. All components work together to form a complete solid hydrogen storage system. This structure completely eliminates the need for high-strength, large-volume hydrogen storage containers and stringent sealing and testing systems required by the high-pressure gaseous hydrogen storage technology commonly used on existing offshore platforms. It fundamentally solves the problems of high cost and high process complexity of existing high-pressure gaseous hydrogen storage equipment, significantly reduces the equipment investment and process difficulty for hydrogen storage in conjunction with offshore wind power hydrogen production, and achieves efficient coupling of offshore wind power hydrogen production and solid hydrogen storage, adapting to the actual needs of on-site hydrogen production and low-cost hydrogen storage in offshore wind power. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the hydrogen storage component structure of the present invention.

[0019] Figure 3 This is a flowchart of the solid-state hydrogen storage method coupled with offshore wind power for hydrogen production according to the present invention.

[0020] The numbers in the diagram represent: 1. Seawater electrolysis hydrogen production assembly; 2. Hydrogen storage assembly; 21. Cooler; 22. Hydrogen buffer tank; 23. Hydrogen booster pump; 24. Hydrogen high-pressure buffer tank; 3. Reactor; 4. Alloy powder storage tank; 5. Stirring and stabilizing assembly; 6. Solid hydrogen storage material storage tank; 7. Vacuum pump. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In view of the shortcomings of the prior art, this embodiment provides a solid-state hydrogen storage system and method coupled with offshore wind power hydrogen production, which can be referred to as follows: As attached Figure 1As shown, a solid-state hydrogen storage system coupled with offshore wind power for hydrogen production includes a seawater electrolysis hydrogen production component 1, a hydrogen storage component 2, a reactor 3, an alloy powder storage tank 4, a stirring and stabilizing component 5, and a solid hydrogen storage material storage tank 6. The seawater electrolysis hydrogen production component 1 utilizes offshore wind power energy to complete water electrolysis, serving as the hydrogen production source for the entire system and stably producing hydrogen that meets usage standards, adapting to the on-site hydrogen production mode of offshore wind power. The hydrogen storage component 2 is interconnected with the seawater electrolysis hydrogen production component 1, enabling unified temporary storage and pretreatment of the electrolyzed hydrogen, ensuring a stable and orderly hydrogen delivery flow. The reactor 3 has a first inlet and a second inlet at its top, serving as the core site for the adsorption and combination reaction between hydrogen and alloy powder, providing a closed and stable environment for the gas-solid mixing reaction. The reaction space is as follows: the hydrogen storage component 2 is connected to the reactor 3 via the first inlet, which can smoothly transport the pretreated hydrogen into the reactor 3 to participate in the reaction; the alloy powder storage tank 4 is used to centrally store the alloy raw materials used for solid hydrogen storage. It is connected to the reactor 3 via the second inlet, which can quantitatively add alloy powder into the reactor 3 to achieve full contact between hydrogen and alloy powder and complete the hydrogen adsorption operation; the stirring and stabilizing component 5 is connected to the outside of the reactor 3, which is mainly used to homogenize and stabilize the metal hydride after the hydrogen adsorption reaction, and optimize the overall performance of the finished hydrogen storage material; the solid hydrogen storage material storage tank 6 is directly connected to the stirring and stabilizing component 5, which can uniformly collect and store the stabilized metal hydride to complete the final hydrogen storage process.

[0025] Among them, the seawater electrolysis hydrogen production component 1 is an existing technology, which is an electrolysis hydrogen production equipment driven by offshore wind power clean energy. It can directly use surplus offshore wind power to electrolyze seawater to produce hydrogen, which meets the operational needs of on-site utilization of offshore hydrogen production; the hydrogen storage component 2 is a hydrogen transfer and control unit, which can stabilize and temporarily store the produced hydrogen to avoid the impact of hydrogen transportation pressure fluctuations on reaction efficiency; the reaction vessel 3 is a closed pressure-resistant reaction chamber with good sealing and pressure-bearing performance, which can meet the high temperature and high pressure closed environment conditions required for gas-solid hydrogen absorption reaction; the alloy powder storage tank 4 is a closed storage tank that can isolate external water vapor and sea wind erosion, ensure the purity of the internal alloy powder raw materials, and prevent the raw materials from deteriorating and failing prematurely; the stirring and stabilizing component 5 is a material post-processing mechanism that optimizes the material mixing uniformity by mechanical stirring and improves the structural stability of hydrogen storage materials; the solid hydrogen storage material storage tank 6 is a finished product closed storage container with moisture-proof, corrosion-proof, and heat-insulating properties, which is suitable for long-term storage of solid hydrogen storage materials in complex offshore environments.

[0026] Specifically, when the entire system is in operation, it first relies on offshore wind power to supply electricity, and the seawater electrolysis hydrogen production unit 1 carries out electrolysis to continuously produce industrial hydrogen. The produced hydrogen is directly transported to the hydrogen storage unit 2 for temporary storage and pressure regulation. Subsequently, the hydrogen storage unit 2 introduces the pressure-stabilized hydrogen into the reactor 3 through the first inlet. At the same time, the alloy powder storage tank 4, according to the set ratio, adds alloy powder into the reactor 3 through the second inlet, so that the hydrogen and alloy powder can fully contact each other in the sealed reactor 3 to undergo a hydrogen absorption reaction, completing the conversion of gaseous hydrogen into solid storage form. After the gas-solid hydrogen absorption reaction in the reactor is completely completed, the metal hydride is uniformly transported to the stirring and stabilizing unit 5. Through stirring, the metal hydride is coated with a coating material to improve the overall stability. After the material is stabilized and processed, it is directly transported to the solid hydrogen storage material storage tank 6 for centralized and sealed storage. The entire process of offshore wind power hydrogen production to solid hydrogen storage is completed. The whole process is coherent and compact, and can be adapted to the continuous hydrogen storage operation requirements of offshore platforms.

[0027] Compared to existing technologies, most current offshore wind power hydrogen production and storage operations utilize high-pressure gaseous hydrogen storage. This method requires not only bulky and costly high-strength high-pressure hydrogen storage containers, but also comprehensive supporting facilities for high-pressure sealing testing and pressure regulation. This significantly increases the overall investment cost of offshore platform hydrogen storage equipment and the difficulty of on-site construction and layout. The complex overall structure and cumbersome daily operation and maintenance processes make it difficult to meet the actual development needs of streamlined layout and low-cost hydrogen storage on offshore platforms. This solution abandons the traditional high-pressure gaseous hydrogen storage structure and adopts a solid-state hydrogen storage combination structure that combines wind power hydrogen production with alloy powder hydrogen absorption and storage. The hydrogen absorption and chemical reaction between hydrogen and alloy powder is completed by the reactor 3, and the material is solidified and stored by the stirring and stabilizing component 5. This completely eliminates the dependence on large high-pressure hydrogen storage tanks, simplifies the supporting equipment in the overall structural layout, and effectively simplifies the overall process of offshore hydrogen storage.

[0028] Through the above technical solution, this application realizes the integrated layout of offshore wind power hydrogen production and solid-state hydrogen storage operations. Hydrogen is produced on-site using clean offshore energy through seawater electrolysis hydrogen production component 1, and then the hydrogen is converted into solid-state hydrogen through hydrogen storage component 2 and reactor 3. The finished product is collected and stored by subsequent stirring and stabilizing component 5 and storage tank. The overall system structure is compact and simple, eliminating the need for large-scale high-pressure hydrogen storage equipment and complex high-pressure supporting facilities. This effectively reduces the construction cost and on-site layout difficulty of hydrogen storage equipment on offshore platforms, simplifies daily operation and maintenance management processes, and provides higher storage safety and less susceptibility to changes in sea waves and ambient temperature. It can fully meet the actual solid-state hydrogen storage needs of low-cost, high-safety, and easy-to-deploy offshore wind power hydrogen production in deep-sea areas.

[0029] In this embodiment, the stirring stabilization component 5 includes a stirrer and a coating material injection pipe. The stirrer is fixedly mounted on one side of the reactor 3. The metal hydride that has completed the hydrogen absorption reaction inside the reactor 3 can be directly transferred to the inside of the stirrer (it can be transferred manually or by existing automated equipment). The stirring structure inside the stirrer is used to achieve all-round mixing of the material. The coating material injection pipe is vertically arranged at the top of the stirrer. The inner cavity of the pipe is directly connected to the inner cavity of the stirrer. It can quantitatively inject special coating material into the stirrer according to process requirements to achieve surface coating modification treatment of metal hydride.

[0030] The agitator is a closed industrial mixing device with multiple sets of internal impellers, providing uniform and controllable mixing force. It can perform homogenization and mixing of large quantities of powdery materials, meeting the continuous material handling needs of offshore platforms. The coating material injection pipe is a corrosion-resistant and pressure-resistant conveying pipe, suitable for conveying liquid coating materials. The pipe end is equipped with a flow control structure, which can accurately control the amount of coating material injected, ensuring accurate and uniform coating ratio. One end of the coating material injection pipe is connected to an external injection pump, and the other end is connected to the inside of the agitator.

[0031] Specifically, during the actual installation phase, the agitator is first fixedly connected to the material outlet of reactor 3, ensuring seamless connection between the discharge channel of reactor 3 and the feed channel of the agitator, thus ensuring smooth material transfer without residue. Then, the coating material injection pipe is vertically fixed at the top of the agitator, completing the connection of the external material conveying pipeline and ensuring proper sealing and corrosion protection. During system operation, the metal hydride that has undergone hydrogen absorption reaction inside reactor 3 is directly fed into the agitator. According to the material processing procedure, the operator introduces the coating material into the agitator through the coating material injection pipe, simultaneously starting the agitator to perform stirring operations, ensuring the coating material is evenly adhered to the surface of the metal hydride, thus completing the overall stable modification of the material.

[0032] Compared to existing technologies, traditional solid-state hydrogen storage materials rely solely on simple stirring for processing, lacking a dedicated coating and modification structure. This results in poor surface protection of the metal hydride after the hydrogen absorption reaction, making it highly susceptible to hydrogen desorption and material oxidation in high-humidity, high-salt-spray marine environments. This significantly shortens the effective storage period of solid-state hydrogen storage materials and makes it difficult to guarantee hydrogen storage stability. This solution adds an independent coating material injection pipeline paired with a dedicated stirrer, simultaneously completing the material coating and protection treatment while achieving homogenization, effectively overcoming the shortcomings of insufficient protection in traditional material processing methods.

[0033] Through the above technical solution, this application adopts a combined stirring and stabilizing structure with a stirrer and a top coating material injection pipe. On the basis of achieving uniform stirring of metal hydrides and eliminating internal agglomeration of materials, it can simultaneously complete the surface coating and protection of materials, effectively improving the oxidation resistance, moisture resistance and corrosion resistance of metal hydrides, reducing the occurrence of hydrogen self-desorption in harsh marine environments, extending the storage and use time of solid hydrogen storage materials, and further improving the operational stability and hydrogen storage reliability of the entire solid hydrogen storage system under complex marine conditions.

[0034] In this embodiment, as shown in the appendix Figure 1 As shown, an air venting pump 7 is installed on the top of the reactor 3. The air venting pump 7 is connected to the interior of the reactor 3 through a pipe. The air venting pump 7 is installed and fixed on the outside of the top of the reactor 3. It directly penetrates the internal reaction chamber of the reactor 3 through the connecting pipe. It can perform gas extraction and venting operations on the internal space of the reactor 3 before and after the reaction operation, and precisely control the internal gas environment of the reactor 3.

[0035] Among them, the venting pump 7 is a small negative pressure suction device, which has the characteristics of convenient start-up and shutdown and stable suction rate, and is suitable for the gas venting conditions inside the closed reaction chamber; the connecting pipeline is made of high pressure and corrosion resistant pipe material, which can be adapted to the hydrogen transportation environment for a long time, and the sealing and corrosion resistance meet the standards for use on offshore platforms.

[0036] Specifically, before the entire system starts hydrogen storage, the staff starts the vent pump 7 at the top of the reactor 3 to extract all residual air and impurities inside the reactor 3 through the connecting pipe, creating a pure and impurity-free sealed reaction environment. After a single batch of hydrogen absorption reaction is completed, the vent pump 7 can also be started according to the working conditions to quickly remove the residual gas that did not participate in the reaction inside the reactor 3, so as to prepare the environment for the next batch of hydrogen storage work in advance, and ensure that the environment of each batch of hydrogen absorption reaction maintains a uniform standard.

[0037] Through the above technical solution, this application adds a connected venting pump 7 structure to the top of the reactor 3, which can quickly vent the internal cavity of the reactor 3, effectively remove residual air and harmful impurity gases in the reactor, avoid side reaction problems caused by impurity gases, greatly improve the purity and reaction efficiency of hydrogen absorption reaction between hydrogen and alloy powder, ensure the uniform quality of solid hydrogen storage finished product materials, simplify the internal environment cleaning process of the reactor 3, and improve the continuous circulation operation efficiency of the whole system.

[0038] Furthermore, the vent pump 7 can be used to remove residual gas from the reactor 3, and can also be used to complete air discharge and inert gas replacement operations.

[0039] In this embodiment, an emergency vent valve is installed on the top of the reactor 3. The emergency vent valve is connected to the interior of the reactor 3 through a pipeline. The emergency vent valve is fixedly installed at the top of the reactor 3 and is directly connected to the internal cavity of the reactor 3 through a dedicated connecting pipeline. It is a special component for safe pressure relief and exhaust of the reactor 3 and is mainly used to deal with sudden working conditions such as abnormal pressure inside the reactor and excessive gas concentration.

[0040] Among them, the emergency venting valve is an automatic sensing safety pressure relief valve that can sense the internal air pressure value of the reactor 3 in real time. It has the functions of automatic opening and automatic closing, without the need for real-time manual operation, and has strong safety protection performance. The matching connecting pipe diameter is adapted to the emergency exhaust flow, so the exhaust is unobstructed and can quickly complete the emergency pressure relief operation.

[0041] Specifically, when the entire system is operating normally during hydrogen absorption, the emergency vent valve is in a normally closed and sealed state, and will not affect the sealed reaction environment inside reactor 3. When encountering sudden changes in the marine environment, system malfunctions, or other situations that cause a sharp increase in the internal pressure of reactor 3 and the internal gas content to exceed the safety standard, the emergency vent valve will automatically sense the pressure abnormality and open quickly, rapidly venting the excess gas in the reactor to the outside through the connecting pipe, thus achieving emergency pressure relief and stabilization. After the internal pressure of reactor 3 returns to the safety standard range, the emergency vent valve will automatically close, restoring reactor 3 to a sealed reaction state.

[0042] Compared to existing technologies, traditional offshore hydrogen storage reactors mostly only have conventional venting structures and lack independent, dedicated emergency safety venting protection structures. Once equipment malfunctions or internal pressure becomes uncontrolled, they cannot quickly perform emergency depressurization operations, easily leading to safety hazards such as hydrogen leakage and equipment deformation under pressure. The overall safety protection level of hydrogen production and storage operations on offshore platforms is relatively low. This solution adds an independent emergency venting valve, specifically designed for sudden abnormal operating conditions, thus addressing the shortcomings in emergency safety protection.

[0043] Through the above technical solution, this application adds an emergency venting valve safety protection structure to the top of the reactor 3. Without affecting the normal closed hydrogen absorption reaction operation of the reactor 3, it can quickly complete the emergency pressure relief and venting operation when the equipment has an abnormal pressure or other emergency failure. This timely resolves the safety risk of excessive gas pressure during the hydrogen production and storage process on the offshore platform, greatly improves the safety factor of the reactor 3 operation, strengthens the overall safety protection capability of the entire offshore wind power coupled solid hydrogen storage system, and ensures the safety of on-site operations on the offshore platform.

[0044] In this embodiment, as shown in the appendix Figure 2As shown, the hydrogen storage assembly 2 includes a cooler 21, a hydrogen buffer tank 22, a hydrogen booster pump 23, and a hydrogen high-pressure buffer tank 24. The inlet of the cooler 21 is directly connected to the hydrogen outlet of the seawater electrolysis hydrogen production assembly 1, and is specifically used to rapidly cool the high-temperature hydrogen produced during electrolysis. The inlet of the hydrogen buffer tank 22 is connected to the outlet of the cooler 21, and is used to receive the hydrogen after cooling, achieving initial pressure stabilization and temporary storage of the hydrogen. The inlet of the hydrogen booster pump 23 is connected to the outlet of the hydrogen buffer tank 22, and can perform pressure boosting operations on the low-pressure hydrogen. The inlet of the hydrogen high-pressure buffer tank 24 is connected to the outlet of the hydrogen booster pump 23. The pressurized hydrogen is stored inside the high-pressure buffer tank, and the outlet of the hydrogen high-pressure buffer tank 24 is then connected to the reactor 3 through a delivery pipeline to complete the directional delivery and supply of hydrogen.

[0045] Among them, the cooler 21 is a special cooling device for industrial hydrogen, which can quickly reduce the temperature of electrolyzed high-temperature hydrogen and avoid the problem of high-temperature hydrogen affecting the subsequent adsorption reaction; the hydrogen buffer tank 22 is a low-pressure stabilizing storage tank, used to balance the instantaneous flow of hydrogen and ensure smooth gas flow; the hydrogen booster pump 23 is a special gas booster device, which can accurately adjust the hydrogen output pressure to match the pressure conditions required for the adsorption reaction inside the reactor 3; the hydrogen high-pressure buffer tank 24 is a high-pressure stabilizing transfer tank, which can stably output constant pressure hydrogen and ensure that the hydrogen pressure entering the reactor 3 is always within the standard range.

[0046] Specifically, after the seawater electrolysis hydrogen production unit 1 produces high-temperature hydrogen, the high-temperature hydrogen first flows into the cooler 21 for forced cooling, regulating the hydrogen temperature to within the process standard range. The cooled hydrogen automatically flows into the hydrogen buffer tank 22 for initial pressure stabilization and temporary storage, balancing the fluctuations in hydrogen delivery flow. Subsequently, the low-pressure hydrogen in the hydrogen buffer tank 22 is sent into the hydrogen booster pump 23 to increase the pressure. The pressurized hydrogen is then collected and stored in the high-pressure hydrogen buffer tank 24. Finally, the high-pressure hydrogen buffer tank 24 delivers hydrogen to the reactor 3 at a constant pressure according to the reaction requirements, participating in the gas-solid hydrogen absorption reaction. The entire process of hydrogen cooling, pressure stabilization, pressurization, and pressure-stabilized delivery is completed.

[0047] Through the above technical solution, this application adopts an integrated multi-stage hydrogen storage pretreatment component consisting of a cooler 21, a hydrogen buffer tank 22, a hydrogen booster pump 23, and a hydrogen high-pressure buffer tank 24. This component can sequentially perform multiple pretreatment processes on the hydrogen produced by seawater electrolysis, including cooling, flow stabilization, pressure boosting, and constant pressure output. This effectively stabilizes the temperature and pressure parameters of the hydrogen introduced into the reactor 3, providing stable and uniform gas source conditions for the hydrogen absorption reaction between hydrogen and alloy powder. This significantly improves the stability and consistency of the gas-solid hydrogen absorption reaction and effectively reduces the performance gap between different batches of solid hydrogen storage products.

[0048] In this embodiment, as shown in the appendix Figure 2 As shown, control valves are installed at the outlets of the cooler 21, the hydrogen buffer tank 22, and the hydrogen booster pump 23. Each type of control valve is installed at the outlet of the cooler 21, the outlet of the hydrogen buffer tank 22, and the outlet of the hydrogen booster pump 23, respectively. The hydrogen on / off status of each equipment port can be independently controlled, realizing segmented start-stop control of the hydrogen delivery path.

[0049] Through the above technical solution, this application adds independent control valves to the outlet positions of cooler 21, hydrogen buffer tank 22, and hydrogen booster pump 23, respectively, to realize segmented independent on / off control of hydrogen pretreatment and delivery pipeline. When a single piece of equipment fails for maintenance or a single process is suspended, only the corresponding valve needs to be closed to complete the partial pipeline cutoff, without shutting down the entire hydrogen production and storage system. This greatly improves the convenience of equipment maintenance and the flexibility of operation control, effectively reduces the interruption time of hydrogen production and storage operations caused by equipment maintenance, and improves the overall continuity of offshore wind power hydrogen production and solid-state hydrogen storage operations.

[0050] In this embodiment, a pressure sensor is installed inside the reactor 3, and the pressure sensor is connected to an external display component. The pressure sensor is built-in and fixedly installed in the reaction chamber inside the reactor 3, and can sense and collect real-time pressure data inside the reactor 3. The sensor is directly connected to the matching display component through a signal line to realize the real-time transmission and display of internal pressure data to the outside.

[0051] Among them, the pressure sensor is a high-precision explosion-proof gas pressure sensing element, which is suitable for use in hydrogen-sealed reaction chambers. It has high accuracy in detecting values ​​and is moisture-proof, shockproof, and gas corrosion-resistant, making it suitable for the complex working conditions of offshore platforms. The external display component is a digital display device, which can intuitively display the pressure values ​​collected by the sensor in real time, making it convenient for staff to view and record them in real time.

[0052] Specifically, throughout the entire hydrogen absorption reaction process in reactor 3, the built-in pressure sensor continuously collects real-time data on the pressure changes inside the reactor 3 cavity and quickly transmits the collected pressure signals to an external display unit via a connection line. On-site operators can directly observe the pressure changes inside reactor 3 in real time through the display unit, accurately judge the progress of the hydrogen absorption reaction in reactor 3 based on the pressure changes, and predict in advance whether the pressure inside reactor 3 is approaching the safety threshold, so as to make adjustments to the operating conditions and prepare for safety protection in advance.

[0053] Through the above technical solution, this application installs a built-in pressure sensor inside the reactor 3 and connects it to an external display component to realize real-time visual monitoring of the internal pressure parameters of the reactor 3. The staff can accurately grasp the dynamic changes of the internal pressure, accurately control the progress of the hydrogen absorption reaction, and reasonably control the start and stop time of the reaction. At the same time, they can detect abnormal fluctuations in the internal pressure in the reactor in the first instance and take control measures in advance, further improving the accuracy of operation control and the predictive ability of the entire solid hydrogen storage system.

[0054] In this embodiment, the alloy powder is calcium-magnesium alloy powder. As a dedicated solid hydrogen storage material for the entire system, the calcium-magnesium alloy powder is stored in the alloy powder storage tank 4. It has excellent hydrogen storage performance and can fully react with hydrogen in a conventional closed reaction environment to achieve stable locking of hydrogen and realize the solid-state conversion of gaseous hydrogen.

[0055] Among them, modified calcium-magnesium alloy powder is also doped into calcium-magnesium alloy powder (modified calcium-magnesium alloy is a well-known hydrogen storage alloy in the field, which can be prepared by conventional means such as element doping, ball milling grain refinement or surface catalytic modification to improve the hydrogen absorption kinetics performance of the alloy). Calcium-magnesium alloy powder is a lightweight, high-capacity hydrogen storage alloy raw material with large hydrogen storage capacity, convenient raw material sourcing, and low overall cost of use. Compared with other rare alloy hydrogen storage raw materials, it has a higher cost performance. This type of alloy powder has stable chemical properties and is not prone to spontaneous oxidation reaction under normal storage conditions at room temperature and pressure. It is easy to store and preserve, making it very suitable for large-scale storage and use on offshore platforms.

[0056] In this embodiment, the coating material is polyethylene glycol 1000. Polyethylene glycol 1000 is a special coating and protective material, which is uniformly supplied to the inside of the coating material injection pipe. It can be evenly attached to the surface of the metal hydride that has completed the hydrogen absorption reaction during the stirring operation, forming a dense and stable protective coating layer.

[0057] Polyethylene glycol 1000 has good fluidity and film-forming properties. It is stable in physicochemical properties at room temperature and does not undergo adverse chemical reactions with metal hydrides after hydrogen absorption, thus not destroying the hydrogen structure locked inside the alloy. At the same time, this material has excellent moisture resistance and salt spray corrosion isolation performance, making it very suitable for high humidity and high corrosion operation and storage environments at sea.

[0058] As attached Figure 3 As shown, this application also provides a solid-state hydrogen storage method coupled with offshore wind power hydrogen production, implemented based on the above-mentioned solid-state hydrogen storage system coupled with offshore wind power hydrogen production, including the following steps: Step S100: The hydrogen produced by the seawater electrolysis hydrogen production unit is stored in the hydrogen storage component; Step S200: Inject the hydrogen gas electrolyzed in the hydrogen storage component and the alloy powder in the alloy powder storage tank into the reactor, and start the reactor; Step S300: After the alloy powder and hydrogen have reacted completely, the reacted metal hydride is transferred into the stirring and stabilizing component and stirred and coated. In step S400, after the stirring and coating are completed, the coated metal hydride is transported to the solid hydrogen storage material storage tank through a closed discharge channel to complete the solid hydrogen storage work.

[0059] The overall operation process includes four core steps: hydrogen temporary storage and pretreatment, gas-solid mixing reaction, stirring, coating and stabilization, and finished product collection and storage. First, the hydrogen produced by the seawater electrolysis hydrogen production unit 1 is pretreated and centrally stored using the complete hydrogen storage unit 2, which includes cooling, stabilizing, and pressurizing. A qualified gas source is then uniformly prepared. Next, the qualified hydrogen from the hydrogen storage unit 2 and the hydrogen storage alloy powder from the alloy powder storage tank 4 are introduced into the reactor 3, creating a closed reaction environment for hydrogen absorption. After the gas-solid hydrogen absorption reaction in the reactor is complete, the reacted material is transferred to the stirring and stabilization unit 5, where a special coating material is simultaneously injected for stirring, coating, modification, and stabilization. Finally, the solid hydrogen storage material, after all stabilization treatments are completed, is sent through a closed discharge channel into the solid hydrogen storage material storage tank 6 for sealed storage, thus completing all the processes for solid hydrogen storage in offshore wind power hydrogen production.

[0060] The hydrogen temporary storage and pretreatment step involves adjusting the raw hydrogen produced by wind power electrolysis to adapt to the operating conditions, removing impurities, and regulating temperature and pressure to create gas source conditions that meet the standards for hydrogen absorption reaction. The gas-solid mixing reaction step is the core process for converting gaseous hydrogen into solid hydrogen storage material, relying on the sealed environment of reactor 3 to complete the solidification and locking of hydrogen. The stirring, coating, and stabilization step is a finished product material optimization and protection process to improve the material's resistance to the complex marine environment. The finished product collection and storage step is the final finishing process, realizing the centralized and standardized storage and management of hydrogen storage materials.

[0061] Specifically, when operating on-site according to the procedure, the first step is to start the seawater electrolysis hydrogen production equipment to produce hydrogen using offshore wind power. All the produced hydrogen is sent into the hydrogen storage component 2, where it undergoes cooling, buffering and stabilizing, and pressurization treatments in sequence, completing the unified temporary storage and distribution of hydrogen. The second step is to open the feed passage of the reactor 3 and introduce qualified hydrogen and calcium-magnesium alloy powder into the reactor 3, then close the feed passage to keep the reactor sealed and allow it to stand to complete the hydrogen absorption reaction. The third step is to open the material discharge passage after the reaction, and send the metal hydride after the hydrogen absorption reaction into the stirrer, where polyethylene glycol 1000 is introduced for simultaneous stirring and coating to complete the material stabilization modification. The fourth step is to transport the processed solid hydrogen storage material to the solid hydrogen storage material storage tank 6 for sealed storage. The entire hydrogen storage method is orderly and closed-loop, and continuous hydrogen storage operations can be carried out repeatedly.

[0062] Compared to existing technologies, traditional offshore wind power hydrogen production and storage operations mostly follow high-pressure gaseous hydrogen storage processes. These processes are simple and rigid, only capable of basic hydrogen storage, lacking supporting procedures such as hydrogen pretreatment and post-processing protection and stabilization. This results in a rudimentary and inefficient overall process, low hydrogen utilization and conversion efficiency, and inadequate safety management during storage. Consequently, it is difficult to establish a standardized, regulated, and continuously reusable integrated offshore hydrogen production and storage process, leading to poor industry compatibility. This proposed hydrogen storage method integrates all processes to form a standardized solid-state hydrogen storage operation.

[0063] Through the above technical solutions, the solid-state hydrogen storage method proposed in this application for coupling hydrogen production with offshore wind power has a complete and clear process flow and a tight and smooth connection between the procedures. It integrates the entire process of hydrogen pretreatment, closed hydrogen absorption reaction, material coating and stabilization, and closed storage, forming a complete and standardized on-site hydrogen production and solid-state hydrogen storage system for offshore wind power. This system can not only give full play to the advantages of low cost and high safety of solid-state hydrogen storage, but also unify and standardize the operation standards of hydrogen production and storage on offshore platforms, simplify the operation difficulty for on-site personnel, and is very suitable for large-scale promotion and application on deep-sea offshore wind power platforms.

[0064] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production, comprising a seawater electrolysis hydrogen production assembly for producing hydrogen, characterized in that, Also includes: A hydrogen storage component, connected to the seawater electrolysis hydrogen production component, is used to store the electrolyzed hydrogen. The reactor has a first inlet and a second inlet at the top; the hydrogen storage assembly is connected to the first inlet to inject hydrogen into the reactor. An alloy powder storage tank is used to store alloy powder; the alloy powder storage tank is connected to the second inlet to inject alloy powder into the reaction vessel and react with hydrogen gas to form metal hydride; A stirring and stabilizing assembly is disposed on one side of the reactor; the reactor is connected to the stirring and stabilizing assembly to transfer the metal hydride in the reactor to the stirring and stabilizing assembly; A solid hydrogen storage tank, connected to the stirring and stabilizing assembly, is used to store the stirred and stabilized metal hydride.

2. The solid-state hydrogen storage system coupled with offshore wind power hydrogen production according to claim 1, characterized in that, The stirring stabilizing component includes: A stirrer is disposed on one side of the reaction vessel; the reaction vessel is connected to the stirrer and is used to transfer metal hydrides into the stirrer. A coating material injection pipe is located at the top of the agitator and connects to the interior of the agitator for injecting coating material into the interior of the agitator.

3. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 1, characterized in that, An air venting pump is installed at the top of the reactor, and the air venting pump is connected to the interior of the reactor through a pipeline.

4. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 1, characterized in that, An emergency vent valve is installed at the top of the reactor, and the emergency vent valve is connected to the interior of the reactor through a pipeline.

5. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 1, characterized in that, The hydrogen storage component includes: A cooler, the inlet of which is connected to the outlet of the seawater electrolysis hydrogen production assembly, is used to cool the electrolyzed hydrogen. A hydrogen buffer tank, the inlet of which is connected to the outlet of the cooler; A hydrogen booster pump, the inlet of which is connected to the outlet of the hydrogen buffer tank; The hydrogen high-pressure buffer tank has its inlet connected to the outlet of the hydrogen booster pump; the outlet of the hydrogen high-pressure buffer tank is connected to the interior of the reactor via a pipeline.

6. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 5, characterized in that, Control valves are installed at the outlets of the cooler, the hydrogen buffer tank, and the hydrogen booster pump.

7. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 1, characterized in that, A pressure sensor is installed inside the reactor, and the pressure sensor is connected to an external display component.

8. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 1, characterized in that, The alloy powder is a calcium-magnesium alloy powder.

9. A solid-state hydrogen storage system coupled with offshore wind power for hydrogen production according to claim 2, characterized in that, The coating material is polyethylene glycol 1000.

10. A solid-state hydrogen storage method coupled with offshore wind power hydrogen production, based on the solid-state hydrogen storage system coupled with offshore wind power hydrogen production according to any one of claims 1-9, characterized in that, include: The hydrogen storage component stores the hydrogen produced by the seawater electrolysis hydrogen production component. The hydrogen gas electrolyzed in the hydrogen storage component and the alloy powder in the alloy powder storage tank are injected into the reactor, and the reactor is started. After the alloy powder has reacted with the hydrogen, the reacted metal hydride is transferred into the stirring and stabilizing assembly and stirred and coated. After the stirring and coating are completed, the coated metal hydride is transported to the solid hydrogen storage material storage tank through a closed discharge channel to complete the solid hydrogen storage work.

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