A sea wind power hydrogen synthesis methanol system suitable for deep sea
Patent Information
- Application Number
- CN202522092890.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-09-29
AI Technical Summary
[0014]本系统针对800MW级深远海风电场，年产约20万吨电制甲醇，并具备弃风消纳功能，将甲醇作为氢气有机液实现生产制备及远距离输送，实现海洋“氢、碳”产业链关联，将有力解决深远海风电电力及制氢长距离输送难题，符合深远海风电场远期发展需要，并推动海洋碳循环经济高质量发展，在脱碳政策和绿色燃料需求的双重推动下，具有极高的市场潜力。
Smart Images
Figure CN224703201U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of marine offshore wind power application equipment, specifically relating to an offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications. Background Technology
[0002] In the past two years, orders for methanol-fueled ships have seen explosive growth, making methanol the most competitive and promising green fuel for shipping. It is projected that by 2050, methanol demand will reach 500 million tons, including 120 million tons of fossil methanol, 130 million tons of biomass methanol, and 250 million tons of electro-produced methanol. The volume of electro-produced methanol will expand significantly, and the production of green methanol from biomass and waste will be insufficient to meet the huge growth potential of the future methanol shipping market.
[0003] Currently, deep-sea wind power transmission and hydrogen production and transportation technologies face challenges and high costs. Methanol, as an organic carrier of hydrogen, presents the most economical and feasible option for deep-sea wind resources to be converted into methanol on-site. With the development of deep-sea wind power-to-hydrogen technology, the full launch of the international carbon market, and the increasing demand for methanol fuel and carbon dioxide capture and treatment from shipping, the investment and operating costs of carbon dioxide hydrogenation to methanol technology will continue to decrease, and the economics of methanol fuel will continue to rise. The commercial application of deep-sea methanol production will become an important solution to meet future decarbonization policies. Summary of the Invention
[0004] To address the aforementioned problems, this invention provides an offshore wind power-to-hydrogen methanol synthesis system suitable for deep-sea applications, the technical solution of which is as follows: A wind power hydrogen production and methanol synthesis system suitable for deep-sea applications includes a hull, a wind power receiving module, a methanol production system, and a wind curtailment and consumption module located above the main deck of the hull, and a hydrogen production system, a hydrogen storage module, a carbon dioxide storage tank, a methanol storage tank, a power distribution module, and a marine system module located in the cabin below the main deck.
[0005] The methanol production system includes a gas compression and mixing module, a methanol synthesis module, and a methanol distillation module. The gas compression and mixing module is connected to the methanol synthesis module and the methanol distillation module in sequence through pipelines, and the resulting methanol enters the methanol storage tank through pipelines.
[0006] The wind curtailment and absorption module includes a lithium battery, a DAC module, and a hydrogen liquefaction module. The DAC module is equipped with an air contactor and an absorption and desorption device. The air contactor contains an ammonia absorbent and is connected to the absorption and desorption device.
[0007] The hydrogen production system is connected to the hydrogen storage module, and the hydrogen storage module and the carbon dioxide storage tank are connected to the gas compression and mixing module through pipelines.
[0008] The power distribution module includes a 10kV distribution panel, a 10kV transformer, a 400V distribution panel, a 400V transformer, and a 230V distribution panel. The 10kV distribution panel is connected to the hydrogen production module, the methanol production module, and the battery. The 10kV transformer reduces the AC high voltage to AC low voltage and supplies it to the 400V distribution panel. The 400V distribution panel is connected to the hydrogen production module and the methanol production module. The 400V transformer reduces the AC high voltage to AC low voltage and supplies it to the 230V distribution panel. The 230V distribution panel is connected to the marine system module.
[0009] Furthermore, the aforementioned offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications includes a hydrogen storage module comprising a hydrogen compressor and a hydrogen storage tank. The hydrogen produced by the hydrogen production system is pressurized to 21 MPa by the hydrogen compressor before entering the hydrogen storage tank.
[0010] Furthermore, the aforementioned offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications has additional features, with refueling stations located on both sides of the hull, and carbon dioxide storage tanks connected to the refueling stations and the methanol production module, respectively.
[0011] Furthermore, the aforementioned offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications further utilizes four medium-pressure C-type tanks for carbon dioxide storage.
[0012] Furthermore, the aforementioned offshore wind power hydrogen production and methanol synthesis system, suitable for deep-sea applications, includes a living area above the main deck.
[0013] Furthermore, in the aforementioned offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications, the methanol storage tank is an integral structural unit.
[0014] This system is designed for 800MW deep-sea wind farms, producing approximately 200,000 tons of methanol annually through electro-methanol production. It also features the capability to absorb wind curtailment, using methanol as an organic liquid for hydrogen production and long-distance transportation. This enables the linkage of the marine "hydrogen and carbon" industrial chain, effectively solving the challenges of long-distance transportation of electricity and hydrogen produced from deep-sea wind power. It meets the long-term development needs of deep-sea wind farms and promotes the high-quality development of the marine carbon circular economy. Driven by both decarbonization policies and the demand for green fuels, it has extremely high market potential. Attached Figure Description
[0015] Figure 1 This is a side view of the invention; Figure 2 This is a top view of the present invention; Figure 3 This is a diagram showing the electrical module layout of the present invention; Figure 4 This is a layout diagram of the hydrogen production module and hydrogen storage module of the present invention; Figure 5 This is a schematic diagram illustrating the principle of methanol production in this invention; Figure 6 This is a schematic diagram of the principle of wind curtailment and utilization in this invention; Figure 7 It is an electrical schematic diagram; The components include: 1-hull, 2-methanol production module, 3-hydrogen production module, 4-hydrogen storage module, 5-carbon dioxide storage tank, 6-methanol storage chamber, 7-wind power receiving module, 8-power distribution module, 9-marine system module, 10-curtailed wind power consumption module, 11-living area, 12-gas compression and mixing module, 13-methanol synthesis module, 14-methanol distillation module, 15-hydrogen production equipment, 16-hydrogen reprocessing equipment, 17-hydrogen production auxiliary equipment, 18-hydrogen compressor, 19-hydrogen storage container, 20-submarine cable, 21-66kV transformer, 22- 66kV GIS, 23-10kV transformer, 24-10kV switchboard, 25-400V transformer, 26-400V switchboard, 27-230V switchboard, 28-hydrogen fuel cell, 29-storage battery, 30-isolation transformer, 31-containerized lithium battery, 32-DAC module, 33-hydrogen liquefaction equipment, 34-refueling station, 35-rectifier-inverter, 36-DC converter, 37-DC switchboard, 38-emergency generator, 39-emergency switchboard, 40-wind turbine generator, 41-step-up transformer. Detailed Implementation
[0016] The invention will be further described with reference to the accompanying drawings.
[0017] A system for synthesizing methanol from hydrogen produced by offshore wind power in deep-sea areas, such as... Figures 1-7 As shown, the specific working principle of each module is as follows: Methanol production module 2: First, the raw material gases hydrogen and carbon dioxide are mixed and compressed in the gas compression and mixing module 12, and then enter the reactor of the methanol synthesis module 13 for chemical reaction under the action of a catalyst. The product is cooled and separated into gas and liquid to obtain crude methanol. The crude methanol then enters the methanol distillation module 14 for distillation to obtain the final methanol product.
[0018] Hydrogen Production Module 3: The main equipment included in the hydrogen production module is hydrogen production equipment 15, hydrogen post-processing equipment 16, and related auxiliary equipment 17. Hydrogen production equipment 15 is mainly an electrolyzer; hydrogen post-processing equipment 16 is mainly a gas-liquid separator, hydrogen purification equipment, etc.; auxiliary equipment 17 is mainly a water replenishment device, nitrogen purging and safety device, high / low temperature cooling system, transformer, rectifier, control cabinet, etc.
[0019] Its working principle is to produce fresh water through the water making unit on the equipment, and then electrolyze the fresh water into hydrogen and oxygen through the electrolytic cell. The resulting hydrogen undergoes gas-liquid separation and purification processes to make its composition indicators meet the requirements of methanol feedstock gas, and then it is sent to the next methanol synthesis process.
[0020] Hydrogen storage module 4: Its working principle is to store hydrogen when wind power is abundant and release hydrogen when wind power is insufficient. In hydrogen storage mode, hydrogen from hydrogen production module 3 is pressurized to 21MPa by hydrogen compressor 18 and then stored in hydrogen storage container 19. In hydrogen release mode, the hydrogen stored in hydrogen storage container 19 is depressurized and supplied to methanol production module 2 and hydrogen fuel cell 28.
[0021] Wind power receiving module 7: The electrical energy generated by the wind turbine 40 is first transmitted to the 66kV GIS22, and after collection, it is distributed to the 66kV transformer 21. The 66kV transformer 21 reduces the AC high voltage to AC low voltage and transmits it to the 10kV distribution panel 24.
[0022] Power distribution module 8: The 10kV distribution panel 24 supplies power to the hydrogen production module 3 and the methanol production module 2, and charges the storage battery 29. The 10kV transformer 23 reduces the AC high voltage to AC low voltage and supplies it to the 400V distribution panel 26, which supplies power to the hydrogen production module 3 and the methanol production module 2. The 400V transformer 25 reduces the AC high voltage to AC low voltage and supplies it to the 230V distribution panel 27, which supplies power to the marine system module 9. The emergency generator 34 is connected to the emergency distribution panel 35. The emergency distribution panel 35 and the 400V distribution panel 26 are connected by a cable. Under normal operating conditions, the 400V distribution panel 26 supplies power to the emergency distribution panel 35. Under emergency conditions, the emergency generator 38 starts, and the emergency distribution panel 39 supplies power to the 230V distribution panel 27. Battery 29 is connected to DC-DC converter 36. When wind power is sufficient, the wind power is stepped down through isolation transformer 30 via 10kV switchboard 24, and then transmitted to DC switchboard 37 via rectifier-inverter 35. DC switchboard 37 stores the power in battery 29 via DC-DC converter 36. In short-term windless conditions, battery 29 discharges to DC switchboard 37 via DC-DC converter 36. DC switchboard 37 converts DC power to AC power via rectifier-inverter 35. Part of the power is supplied to methanol production module 2 via 400V switchboard 26, and the other part is stepped up to 10kV switchboard 24 via isolation transformer 30 to supply power to methanol production module 2 and marine system module 9. Under long-term windless conditions, part of the electrical energy generated by the hydrogen fuel cell 28 is used to power the methanol production module 2 via the 400V switchboard 26, and the other part of the electrical energy is stepped up to the 10kV switchboard 24 via the step-up transformer 41 to power the methanol production module 2 and the marine system module 9.
[0023] The carbon dioxide storage tank 5 receives liquid carbon dioxide through the refueling stations 34 located on both sides of the hull 1 and supplies it to the methanol production module 2.
[0024] The methanol storage tank 6 receives and stores methanol from the methanol production module 2, and then transports the methanol to the methanol transport ship through the refueling stations 34 located on both sides of the hull 1.
[0025] The wind curtailment and utilization module 10 includes a lithium battery 31, a DAC module 32, and a hydrogen liquefaction module 33. The DAC module 32 mainly comprises an air contactor and an absorption and desorption device. Its working principle involves the ammonia absorbent absorbing CO2 in the air contactor, followed by heating in the absorption and desorption device to release pure CO2. The hydrogen liquefaction module 33 mainly comprises a helium compressor, a cold box, a liquid nitrogen tank, and a liquid hydrogen tank. Its working principle involves pre-cooling the cold box with liquid nitrogen, then using the cold energy provided by the expansion of high-pressure helium to low-temperature, low-pressure helium to liquefy the raw material hydrogen within the cold box. The liquefied hydrogen is then stored in the liquid hydrogen tank. Under conditions of ample wind power, the wind power receiving module 7 and the power distribution module 8 supply wind power to the hydrogen production module 3, the hydrogen storage module 4, and the methanol production module 2, and charge the battery 29 and the wind curtailment consumption module 10. The hydrogen production module 3 produces hydrogen, part of which is supplied to the methanol production module 2 and the other part to the hydrogen storage module 4. The hydrogen storage module 4 receives hydrogen and compresses and stores it. The methanol production module 2 produces methanol and stores it in the methanol storage tank 6. The containerized lithium battery 31 in the wind curtailment consumption module 10 can replace the battery for the electric supply ship, the DAC module 32 can capture carbon dioxide in the air, and the hydrogen liquefaction device 33 can liquefy and store hydrogen.
[0026] Under normal wind power operating conditions, the wind power receiving module 7 and the power distribution module 8 supply wind power to the hydrogen production module 3 and the methanol production module 2; the hydrogen production module 3 produces hydrogen, all of which is supplied to the methanol production module 2; the methanol production module 2 produces methanol and stores it in the methanol storage tank 6.
[0027] When wind power is insufficient, the wind power receiving module 7 and the power distribution module 8 supply wind power to the methanol production module 2; the hydrogen storage module 4 supplies the stored hydrogen to the methanol production module 2; the methanol production module 2 produces methanol and stores it in the methanol storage tank 6.
[0028] In short-term windless conditions, the battery 29 and the power distribution module 8 supply electrical energy to the methanol production module 2; the hydrogen storage module 4 supplies the stored hydrogen to the methanol production module 2; the methanol production module 2 produces methanol and stores it in the methanol storage tank 6.
[0029] Under long-term windless conditions, the hydrogen fuel cell 28 and the power distribution module 8 supply electrical energy to the methanol production module 2; the hydrogen storage module 4 supplies the stored hydrogen to the methanol production module 2 and supplies hydrogen to the hydrogen fuel cell 28 for power generation; the methanol production module 2 produces methanol and stores it in the methanol storage tank 6.
Claims
1. A system for synthesizing methanol from hydrogen produced by offshore wind power in deep-sea areas, characterized in that, The hull, wind power receiving module, methanol production system, and wind curtailment and consumption module are located above the main deck of the hull, while the hydrogen production system, hydrogen storage module, carbon dioxide storage tank, methanol storage tank, power distribution module, and marine system module are located in the cabin below the main deck. The methanol production system includes a gas compression and mixing module, a methanol synthesis module, and a methanol distillation module. The gas compression and mixing module is connected to the methanol synthesis module and the methanol distillation module in sequence through pipelines, and the methanol produced enters the methanol storage tank through pipelines. The wind curtailment and absorption module includes a lithium battery, a DAC module, and a hydrogen liquefaction module. The DAC module is equipped with an air contactor and an absorption and desorption device. The air contactor contains an ammonia absorbent and is connected to the absorption and desorption device. The hydrogen production system is connected to the hydrogen storage module, and the hydrogen storage module and the carbon dioxide storage tank are respectively connected to the gas compression and mixing module through pipelines; The power distribution module includes a 10kV distribution panel, a 10kV transformer, a 400V distribution panel, a 400V transformer, and a 230V distribution panel. The 10kV distribution panel is connected to the hydrogen production module, the methanol production module, and the battery. The 10kV transformer reduces the AC high voltage to AC low voltage and supplies it to the 400V distribution panel. The 400V distribution panel is connected to the hydrogen production module and the methanol production module. The 400V transformer reduces the AC high voltage to AC low voltage and supplies it to the 230V distribution panel. The 230V distribution panel is connected to the marine system module.
2. The offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications according to claim 1, characterized in that, The hydrogen storage module includes a hydrogen compressor and a hydrogen storage tank. The hydrogen production system pressurizes the produced hydrogen to 21 MPa via the hydrogen compressor before it enters the hydrogen storage tank.
3. The offshore wind power hydrogen production and methanol synthesis system suitable for deep-sea applications according to claim 1, characterized in that, The ship has refueling stations on both sides of the hull, and carbon dioxide storage tanks are connected to the refueling stations and the methanol production module, respectively.
4. A system for synthesizing methanol from offshore wind power in deep-sea environments, as described in claim 1, is characterized in that... The carbon dioxide storage tank consists of four medium-pressure C-type tanks.
5. A system for synthesizing methanol from offshore wind power in deep-sea environments according to claim 1, characterized in that, The living area is located above the main deck.
6. A system for synthesizing methanol from offshore wind power for deep-sea applications, as described in claim 1, is characterized in that... The methanol storage tank is an integral structure.