Comprehensive offshore energy platform and method based on wind power, tidal current energy and seawater electrolysis hydrogen production and hydrogenation

Abstract

The invention discloses a comprehensive offshore energy platform and method based on wind power, tidal current energy and seawater electrolysis hydrogen production and hydrogenation, and the platform comprises a wind turbine generator set, a hydrogen production mechanism and a three-buoy-three-negative-pressure-barrel up-and-down combined floating type foundation which is of a regular triangle structure, and a triangular supporting table used for fixedly installing the hydrogen production mechanism is formed above the floating type foundation; the hydrogen production mechanism comprises a photovoltaic module, a seawater electrolytic cell, hydrogen compression equipment, hydrogen storage equipment and a backup power supply which are electrically connected with the wind turbine generator, and hydrogen conveying pipelines are sequentially connected among the seawater electrolytic cell, the hydrogen compression equipment and the hydrogen storage equipment; the back-up power source is electrically connected with the seawater electrolytic cell, the hydrogen compression device and the hydrogen storage device, the seawater electrolytic cell is electrically connected with the photovoltaic module, the seabed hydrogen storage station is arranged on the seabed, and the platform is fixed through an anchor chain, so that the platform is more stable in the hydrogen production and conveying process.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore integrated platform applications, and relates to an integrated offshore energy platform and method based on wind power, tidal energy, seawater electrolysis hydrogen production, and hydrogenation. Background Art

[0002] The use of renewable energy such as wind and solar energy has become an important support for energy transformation. However, since the generation of such new energy is random, volatile and intermittent, and highly dependent on natural conditions, it is very easy to cause power imbalance, resulting in wind power abandonment and power rationing in some areas, resulting in power waste.

[0003] In view of the above phenomenon, Chinese patent publication number CN113335468A discloses an offshore wind power and hydrogen production floating foundation structure and balancing method, which records that "it includes a floating wind power system and a hydrogen production system, wherein the floating wind power system and the hydrogen production system are connected, and the hydrogen production mechanism, hydrogen storage mechanism, hydrogen transmission mechanism, energy storage mechanism, seawater desalination mechanism, and control system in the hydrogen production system are located inside the floating foundation, and the photovoltaic power generation mechanism is located on the upper part of the annular damping pool of the floating wind power system". Although this prior art solves the problem of organically combining the floating wind power system with the hydrogen production system, it still has technical problems such as high investment cost, general stability of the hydrogen production process, and low hydrogen production reserves; in addition, the hydrogen storage equipment will move with the platform, resulting in unstable safety risks in the hydrogen transmission process. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a comprehensive offshore energy platform and method based on wind power, tidal energy, seawater electrolysis hydrogen production and hydrogenation. The investment cost of offshore wind power and hydrogen production floating infrastructure is low, and the hydrogen production and transmission process is stable.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a comprehensive offshore energy platform based on wind power, tidal energy, seawater electrolysis hydrogen production and hydrogenation, characterized in that: it includes a wind turbine set, a hydrogen production mechanism, and is characterized in that it also includes a three-buoy-three-negative pressure barrel upper and lower combined floating foundation in an equilateral triangle structure, and a triangular support platform for fixedly installing the hydrogen production mechanism is formed above the floating foundation. The hydrogen production mechanism includes a photovoltaic component, a seawater electrolyzer, a hydrogen compression device, a hydrogen storage device and a backup power supply that are electrically connected to the wind turbine set respectively, and the seawater electrolyzer, the hydrogen compression device, and the hydrogen storage device are sequentially connected with a hydrogen transmission pipeline, the backup power supply is electrically connected to the seawater electrolyzer, the hydrogen compression device and the hydrogen storage device respectively, and the seawater electrolyzer is electrically connected to the photovoltaic component; the support member of the wind turbine set passes through the platform and is connected to the seabed hydrogen storage station, and is also connected to the anchor chain; the part of the support member of the wind turbine set that is deep in the sea is also provided with a tidal energy generator set.

[0006] The photovoltaic module is fixedly installed above the seawater electrolyzer near the electrical equipment room.

[0007] The floating foundation comprises three semi-submersible buoys distributed in an equilateral triangle. The three semi-submersible buoys are connected in pairs through a conductor frame. The semi-submersible buoys and the conductor frame are enclosed together to form a triangular support platform.

[0008] The floating foundation also includes three negative pressure barrels anchored on the seabed surface, the three negative pressure barrels are distributed in a regular triangle, and the three semi-submersible buoys are respectively connected to the three negative pressure barrels through three stainless steel chains.

[0009] The wind turbine generator set comprises a tower and a wind turbine. A tower fixing piece is installed on the top of one of the semi-submersible buoys, a tower is installed above the tower fixing piece, and a wind turbine is installed on the top of the tower.

[0010] A dynamic cable for transmitting electricity runs through the semi-submersible buoy connected to the tower fixture.

[0011] The seawater electrolytic cell is connected to a seawater suction mechanism, and the seawater suction mechanism comprises a filter pipe connected to the seawater electrolytic cell and a water pump matched with the filter pipe.

[0012] The hydrogen storage device is a hydrogen storage device with a safety pressure relief device.

[0013] The hydrogen production method of the integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis hydrogen production and hydrogenation as described above comprises the following steps: S1, start the water pump to introduce seawater into the seawater electrolyzer through the seawater delivery pipeline; S2, using photovoltaic modules and wind turbines to cooperate with each other to provide hydrogen production power for seawater electrolyzers, so that high-purity hydrogen is produced in the seawater of the seawater electrolyzers; S3, transporting the hydrogen generated by the seawater electrolyzer to a hydrogen compression device through a hydrogen transmission pipeline, and gradually increasing the pressure of the gas in the hydrogen compression device; S4, transporting the hydrogen processed by the hydrogen compression equipment to the hydrogen storage equipment through a hydrogen transmission pipeline for sealing installation; S5. Lead out the hydrogen filling hose from the hydrogen storage device, and at the same time anchor the hydrogen transport ship near the buoy in the anchorage sea area. After the other end of the hydrogen filling hose is connected to the hydrogen transport ship, first use the stop valve and discharge replacement valve of the hydrogen filling hose to blow and replace the hydrogen filling hose, and then fill the hydrogen transport ship with hydrogen through the stop valve of the hydrogen filling hose and the stop valve of the hydrogen transport ship.

[0014] The main beneficial effects of the present invention are: A subsea hydrogen storage station is set up on the seabed and the platform is fixed by means of anchor chains, making the platform more stable during the hydrogen production and transportation process.

[0015] It can withstand intermittent power sources from wind turbines and photovoltaic modules, will not cause delays or excessive wear of the hydrogen production system, and ensure the stability of the hydrogen production process. At the same time, the hydrogen is pre-compressed before storage, which effectively increases the subsequent storage capacity of hydrogen. At the same time, the floating foundation in the present invention is a three-buoy-three-negative-pressure barrel upper and lower combined floating foundation with an equilateral triangle structure, which greatly improves the stability and firmness of the floating foundation, and a triangular support platform for fixedly installing the hydrogen production mechanism is formed above the floating foundation, thereby effectively ensuring the absolute stability of the entire comprehensive offshore energy platform based on wind power, tidal energy, seawater electrolysis hydrogen production, and hydrogenation.

[0016] Using surplus electricity from abandoned power to electrolyze water to produce hydrogen has extremely high economic and social benefits.

[0017] The floating foundation is manufactured on shore and is less affected by the external environment. At the same time, the floating foundation is assembled with the wind turbine at sea, which makes construction convenient, installation efficient, and further reduces investment costs.

[0018] Hydrogen transport ships load and unload hydrogen in anchorage areas outside floating foundations, which meets the requirements for safe unloading and has a larger operating window. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is a usage state diagram of the present invention.

[0021] Figure 2 It is a structural diagram of the present invention.

[0022] Figure 3 for Figure 1 A partial enlarged view of .

[0023] Figure 4 This is a working principle diagram of the present invention.

[0024] In the figure: 1. dynamic cable, 2. floating foundation, 21. semi-submersible buoy, 22. negative pressure barrel, 23. conductor rack, 24. triangular support platform, 25. stainless steel chain, 3. hydrogen production mechanism, 31. photovoltaic module, 32. seawater electrolyzer, 33. hydrogen compression equipment, 34. hydrogen storage equipment, 341. safety pressure relief device, 35. backup power supply, 4. seawater absorption mechanism, 41. filter pipe, 42. water pump, 5. wind turbine set, 51. fan, 52. tower, 6. tower fixing parts, 7. sea level, 8. seabed surface. DETAILED DESCRIPTION

[0025] like Figure 1~Figure 4 In the invention, a comprehensive offshore energy platform based on wind power, tidal energy, seawater electrolysis hydrogen production and hydrogenation is disclosed, comprising a wind turbine 5 and a three-buoy-three-negative-pressure-barrel upper and lower combined floating foundation 2 in a regular triangle structure, wherein the floating foundation 2 comprises three semi-submersible buoys 21 distributed in an equilateral triangle and three negative-pressure barrels 22 anchored on the seabed surface 8 and connected to the semi-submersible buoys 21 by stainless steel chains 25, wherein the three semi-submersible buoys 21 are connected in pairs by three conductor racks 23, and the three semi-submersible buoys 21 and the three conductor racks 23 are jointly enclosed to form a triangular support platform 24, on which a hydrogen production mechanism 3 is fixedly supported, and the hydrogen production mechanism 3 comprises a photovoltaic module 31, a seawater electrolyzer 32, a hydrogen compression device 33, a hydrogen storage device 34 and a backup power supply 35 respectively connected to the wind turbine 5 by cables, and the seawater electrolyzer 32 can be installed in a corrosion-resistant frame structure room, the frame structure room is fixed on the triangular support platform 24, and the photovoltaic module 31 is fixed on the top of the frame structure room of the seawater electrolyzer 32, the seawater electrolyzer 32 is connected to the photovoltaic module 31 through a cable, and the seawater electrolyzer 32, the hydrogen compression equipment 33, and the hydrogen storage equipment 34 are connected with hydrogen pipelines in sequence, and the backup power supply 35 is connected to the seawater electrolyzer 32, the hydrogen compression equipment 33 and the hydrogen storage equipment 34 through cables, respectively, and a safety pressure relief device 341 is installed on the hydrogen storage equipment 34; the wind turbine set 5 includes a fan 51 and a tower 52, wherein a dynamic cable 1 for transmitting electricity is passed through the interior of one of the semi-submersible buoys 21, and a tower fixing part 6 is installed on the top, the fan 51 is at the top of the tower 52, and the tower 52 is upright and fixed directly above the tower fixing part 6.

[0026] The seawater electrolytic cell 52 is connected to a seawater suction mechanism 4 , which includes a filter pipe 41 and a water pump 42 . The filter pipe 41 is connected to the seawater electrolytic cell 32 , and the water pump 42 is installed on the filter pipe 41 .

[0027] When the three stainless steel chains 25 are all stretched tight and perpendicular to the seabed surface 8, the three semi-submersible buoys 21 are respectively located directly above the negative pressure barrels 22 connected to them by the stainless steel chains 25. Each semi-submersible buoy 21 is partially above the sea level 7 and partially below the sea level 7. Under the action of the stainless steel chains 25, the semi-submersible buoys 21 will not drift in the vertical direction, thereby ensuring the stability and firmness of the floating foundation 2.

[0028] The submarine hydrogen storage station is in contact with the seabed surface and penetrates into the shallow seabed through anchor chains, so that the anchor chains and the submarine hydrogen storage station form a mutually involved angle, which further improves the overall stability and ensures the stability of the hydrogen production and transmission process.

[0029] Before use, the staff first makes the floating foundation 2 on shore, then completes the assembly of the floating foundation 2 and the wind turbine 5 at sea, and installs the hydrogen production mechanism 3 on the triangular support platform 24 on the top of the floating foundation 2. Finally, after the wind turbine 5 and the floating foundation 2 are towed as a whole to the machine site, the floating foundation 2 is anchored on the seabed.

[0030] When in use, first start the water pump 42, and introduce seawater into the seawater electrolyzer 32 through the filter pipe 41. The photovoltaic module 31 and the wind turbine 5 jointly generate electricity, so that the seawater in the seawater electrolyzer 32 is electrolyzed to generate high-purity hydrogen; then, the hydrogen generated by the seawater electrolyzer 32 is transported to the hydrogen storage device 34 through the hydrogen compression device 33 for sealed and safe storage. In the hydrogen compression device 33, the gas pressure is gradually increased step by step, so that the energy loss of hydrogen is close to zero; finally, the hydrogen filling hose is led out from the hydrogen storage device 34, At the same time, a hydrogen transport ship is moored near the buoy in the anchorage sea area. After the other end of the hydrogen filling hose is connected to the hydrogen transport ship, the hydrogen filling hose is first purged and replaced using the stop valve and discharge replacement valve of the hydrogen filling hose, and then the hydrogen transport ship is filled with hydrogen by adjusting the stop valve of the hydrogen filling hose and the stop valve of the hydrogen transport ship. In addition, when the photovoltaic module 31 and the wind turbine 5 cannot operate, the backup power supply 35 is used to provide power for key equipment such as the seawater electrolyzer 32, the hydrogen compression equipment 33, and the hydrogen storage equipment 34 to ensure the stability of the hydrogen production process.

[0031] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A comprehensive offshore energy platform based on wind power, tidal energy, seawater electrolysis hydrogen production and hydrogenation, characterized by: It includes a wind turbine set and a hydrogen production mechanism, and is characterized in that it also includes a three-buoy-three-negative-pressure barrel upper and lower combined floating foundation in an equilateral triangle structure, a triangular support platform for fixedly installing the hydrogen production mechanism is formed above the floating foundation, the hydrogen production mechanism includes a photovoltaic module, a seawater electrolyzer, a hydrogen compression device, a hydrogen storage device and a backup power supply which are electrically connected to the wind turbine set respectively, the seawater electrolyzer, the hydrogen compression device and the hydrogen storage device are sequentially connected with a hydrogen transmission pipeline, the backup power supply is electrically connected to the seawater electrolyzer, the hydrogen compression device and the hydrogen storage device respectively, and the seawater electrolyzer is electrically connected to the photovoltaic module; the support member of the wind turbine set passes through the platform to be connected to the seabed hydrogen storage station and is also connected to the anchor chain; the part of the support member of the wind turbine set that is deep in the sea is also provided with a tidal energy generator set.

2. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The photovoltaic module is fixedly installed above the seawater electrolyzer near the electrical equipment room.

3. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The floating foundation comprises three semi-submersible buoys distributed in an equilateral triangle. The three semi-submersible buoys are connected in pairs through a conductor frame. The semi-submersible buoys and the conductor frame are enclosed together to form a triangular support platform.

4. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The floating foundation also includes three negative pressure barrels anchored on the seabed surface, the three negative pressure barrels are distributed in a regular triangle, and the three semi-submersible buoys are respectively connected to the three negative pressure barrels through three stainless steel chains.

5. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The wind turbine generator set comprises a tower and a wind turbine. A tower fixing piece is installed on the top of one of the semi-submersible buoys, a tower is installed above the tower fixing piece, and a wind turbine is installed on the top of the tower.

6. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 5 is characterized by: A dynamic cable for transmitting electricity runs through the semi-submersible buoy connected to the tower fixture.

7. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The seawater electrolytic cell is connected to a seawater suction mechanism, and the seawater suction mechanism comprises a filter pipe connected to the seawater electrolytic cell and a water pump matched with the filter pipe.

8. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The hydrogen storage device is a hydrogen storage device with a safety pressure relief device.

9. The integrated offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to claim 1 is characterized by: The submarine hydrogen storage station is in contact with the seabed surface and is arranged at an angle to the anchor chain.

10. The hydrogen production method of a comprehensive offshore energy platform based on wind power, tidal energy, seawater electrolysis and hydrogenation according to any one of claims 1 to 9, characterized in that: The steps include: S1, start the water pump to introduce seawater into the seawater electrolyzer through the seawater delivery pipeline; S2, using photovoltaic modules and wind turbines to cooperate with each other to provide hydrogen production power for seawater electrolyzers, so that high-purity hydrogen is produced in the seawater of the seawater electrolyzers; S3, transporting the hydrogen generated by the seawater electrolyzer to a hydrogen compression device through a hydrogen transmission pipeline, and gradually increasing the pressure of the gas in the hydrogen compression device; S4, transporting the hydrogen processed by the hydrogen compression equipment to the hydrogen storage equipment through a hydrogen transmission pipeline for sealing installation; S5. Lead out the hydrogen filling hose from the hydrogen storage device, and at the same time anchor the hydrogen transport ship near the buoy in the anchorage sea area. After the other end of the hydrogen filling hose is connected to the hydrogen transport ship, first use the stop valve and discharge replacement valve of the hydrogen filling hose to blow and replace the hydrogen filling hose, and then fill the hydrogen transport ship with hydrogen through the stop valve of the hydrogen filling hose and the stop valve of the hydrogen transport ship.

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