Wind curtailment absorption type offshore green chemical product preparation system
By setting up multiple power consumption routes in the offshore wind power system and utilizing the physical properties and energy consumption characteristics of hydrogen in different states, the problem of wind abandonment when producing green chemical products from offshore wind power is solved, and the full consumption of wind energy and the improvement of equipment utilization rate are achieved.
Patent Information
- Application Number
- CN202422036544.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-08-22
AI Technical Summary
When offshore wind power is used to produce green chemical products, the instability of wind power leads to wind abandonment, resulting in electricity waste and increased investment costs. In addition, the equipment idle rate is high and wind energy cannot be effectively absorbed.
It adopts multiple power consumption routes, including conventional hydrogen production and consumption routes, high-pressure hydrogen compression and consumption routes, and hydrogen liquefaction and consumption routes, and combines the physical properties and energy consumption characteristics of hydrogen under different states to flexibly consume wind energy, including alkaline water hydrogen production electrolyzers, proton exchange membrane electrolyzers, anion exchange membrane electrolyzers or solid oxide electrolyzers, and provides fresh water support through seawater extraction and desalination modules.
It achieves full absorption of wind energy, reduces equipment idleness, lowers investment costs, improves system profitability, and ensures stable production of green chemical products.
Smart Images
Figure CN223388384U_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of offshore wind power applications, and in particular relates to a wind abandonment and absorption type offshore green chemical product production system. Background Art
[0002] Green development has become a global mainstream trend, and green technology innovation is becoming a key emerging area in the new round of global industrial revolution and technological competition. Offshore wind power hydrogen production is one of the main drivers of future green development. Green hydrogen produced by wind power can be used as a feedstock for the production of green chemical products such as green methanol and green ammonia. However, due to the instability of offshore wind power, it is very likely that when the wind farm has sufficient power, the power consumption of the production facilities will not be enough to absorb the electricity produced by all the wind turbines, resulting in this waste of power, or "wind curtailment." This situation will lead to poor overall economic viability of the facility, and the inability to produce sufficient green chemical products will lead to a slow recovery of the overall project investment cost.
[0003] For such offshore wind power-generated green chemical product facilities, the full utilization of wind power within the wind farm should be considered. Simply increasing the number of hydrogen production equipment can indeed absorb wind energy, but this will make it difficult to manage the space required for production facilities and significantly increase investment costs. Simply increasing the number of hydrogen production equipment also risks leaving a large number of hydrogen production equipment idle when wind power is insufficient, resulting in wasted investment. To address this issue, the properties of hydrogen in different states (temperature, pressure) (gaseous, liquid), and the corresponding energy consumption during production should be considered to fully absorb wind energy at different intensity levels. Summary of the Invention
[0004] To solve the above problems, the present invention provides a wind curtailment and absorption offshore green chemical product production system, which aims to achieve the purpose of fully absorbing wind power and producing green chemical products. The technical solution adopted is:
[0005] A wind-abandoned consumption-type offshore green chemical product production system is used for offshore wind power generation and hydrogen production. It has three power consumption routes, namely a conventional hydrogen production consumption route, a high-pressure hydrogen compression consumption route, and a hydrogen liquefaction consumption route.
[0006] The conventional hydrogen production and consumption route is that the first hydrogen production equipment sends the produced hydrogen to the green chemical product production module, and the green chemical product production module sends the produced green chemical products to the green chemical product storage tank.
[0007] The high-pressure hydrogen compression and consumption route includes the second hydrogen production equipment. The hydrogen produced by the second hydrogen production equipment is compressed by a high-pressure hydrogen compressor unit to a pressure of 20~30Mpa and transported to a high-pressure gaseous hydrogen storage tank for storage. The high-pressure gaseous hydrogen storage tank is connected to the green chemical product production module through a hydrogen pressure reducing valve group.
[0008] The hydrogen liquefaction and consumption route includes a hydrogen liquefaction device. The second hydrogen production equipment liquefies the produced hydrogen through the hydrogen liquefaction device and sends it to the liquid hydrogen storage tank. The liquid hydrogen storage tank is connected to the green chemical product production module through the liquid hydrogen regasification device.
[0009] Green chemical product storage tanks, high-pressure gaseous hydrogen storage tanks, and liquid hydrogen storage tanks are connected to external transmission devices. When offshore wind power generation is in excess, the conventional hydrogen production and consumption route, the high-pressure hydrogen compression and consumption route, and the hydrogen liquefaction and consumption route are started and operated in sequence.
[0010] The first hydrogen production equipment and the second hydrogen production equipment are alkaline water hydrogen production electrolyzers, proton exchange membrane electrolyzers, anion exchange membrane electrolyzers, or solid oxide electrolyzers.
[0011] The above-mentioned wind-abandoned offshore green chemical product production system further comprises a seawater extraction and desalination module that provides fresh water for the first hydrogen production equipment and the second hydrogen production equipment.
[0012] The above-mentioned wind-abandonment-type offshore green chemical product production system further has a seawater extraction and desalination module that is connected to the first hydrogen production equipment and the second hydrogen production equipment through pipelines.
[0013] The first hydrogen production equipment is connected to the green chemical product production module and the green chemical product storage tank in sequence.
[0014] The second hydrogen production equipment is connected to the high-pressure hydrogen compressor unit, high-pressure gaseous hydrogen storage tank, and hydrogen pressure reducing valve unit in sequence, and then connected to the green chemical product production module.
[0015] The second hydrogen production equipment is connected to the hydrogen liquefaction device, liquid hydrogen storage tank, and liquid hydrogen regasification device through pipelines in sequence, and then connected to the green chemical product production module.
[0016] High-pressure gaseous hydrogen storage tanks, liquid hydrogen storage tanks, and green chemical product storage tanks all have transmission pipelines connected to external transmission devices.
[0017] The above-mentioned wind power abandonment and consumption type offshore green chemical product production system, further, the green chemical products are methanol and ammonia.
[0018] The above-mentioned wind curtailment absorption type offshore green chemical product production system can further absorb the wind curtailment of MW-level and GW-level wind farms.
[0019] The above-mentioned wind power abandonment and consumption type offshore green chemical product production system is further applied to offshore platforms, and the platform types are ship-type, self-elevating, semi-submersible, column-stabilized, and fixed.
[0020] The present invention sets up multi-stage wind energy absorption routes, flexibly utilizes the physical properties of hydrogen in different states and the different energy consumption characteristics of production, fully absorbs the wind energy of the wind farm, produces green chemical products and ensures that there is no waste of abandoned wind. At the same time, it reduces the investment in wind power hydrogen production equipment, reduces the idleness of equipment, and improves the overall investment return rate of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the conventional hydrogen production and consumption route;
[0022] Figure 2 This is a schematic diagram of the high-pressure hydrogen compression and consumption route;
[0023] Figure 3 This is a schematic diagram of the hydrogen liquefaction and consumption route;
[0024] Among them, 1-seawater extraction and desalination module, 2-first hydrogen production equipment, 3-second hydrogen production equipment, 4-high-pressure hydrogen compressor unit, 5-high-pressure gaseous hydrogen storage tank, 6-hydrogen pressure reducing valve group, 7-hydrogen liquefaction device, 8-liquid hydrogen storage tank, 9-liquid hydrogen regasification device, 10-green chemical product production module, 11-green chemical product storage tank, 12-external transmission device. DETAILED DESCRIPTION
[0025] The present invention will be further described with reference to the accompanying drawings.
[0026] A wind-abandoned consumption-type offshore green chemical product production system is used for offshore wind power generation and hydrogen production. It has three power consumption routes: conventional hydrogen production consumption route, high-pressure hydrogen compression consumption route, and hydrogen liquefaction consumption route. Figure 3 As shown, the seawater extraction and desalination module is connected to the first and second hydrogen production equipment, respectively. The first hydrogen production equipment is then connected to the green chemical product production module and green chemical product storage tank. The seawater extraction and desalination module is then connected to the second hydrogen production equipment, the high-pressure hydrogen compressor unit, the high-pressure gaseous hydrogen storage tank, and the hydrogen pressure reducing valve unit, before being connected to the green chemical product production module. The second hydrogen production equipment is then connected to the hydrogen liquefaction unit, the liquid hydrogen storage tank, and the liquid hydrogen regasification unit via pipelines, before being connected to the green chemical product production module.
[0027] like Figure 1As shown, the conventional hydrogen production and consumption route involves the first hydrogen production unit delivering hydrogen to the green chemical product production module, which then delivers the green chemical products to the green chemical product storage tank. This route is the standard production route, and the wind power consumption is equal to the total electricity load of the platform.
[0028] When the wind power output of the wind farm is greater than the conventional hydrogen production and consumption route, the high-pressure hydrogen compression and consumption route is started while the conventional hydrogen production and consumption route is kept running. Figure 2 As shown, the high-pressure hydrogen compression and consumption route involves compressing the hydrogen produced by the second hydrogen production equipment through a high-pressure hydrogen compressor unit. After ensuring the normal operation of the green chemical product production module, hydrogen is produced using excess wind energy. The produced hydrogen is compressed by the high-pressure hydrogen compressor unit to a pressure of 20-30 MPa to reduce its volume and then transported to high-pressure gaseous hydrogen storage tanks for storage. In addition to absorbing the wind power consumed by the conventional hydrogen production and consumption route, this route can also absorb additional wind power to meet the power load of the second hydrogen production equipment and the high-pressure hydrogen compressor unit.
[0029] When the wind power output of the wind farm is greater than the conventional hydrogen production and consumption route and the high-pressure hydrogen compression consumption route, the hydrogen liquefaction consumption route is started while maintaining the operation of the conventional hydrogen production and consumption route and the high-pressure hydrogen compression consumption route. Figure 3 As shown, the hydrogen liquefaction and consumption route involves the second hydrogen production facility liquefying the hydrogen produced via a hydrogen liquefaction unit and then transferring it to a liquid hydrogen storage tank. The liquid hydrogen storage tank is then connected to the green chemical product production module via a liquid hydrogen regasification unit. Once the hydrogen liquefaction unit is activated, and since hydrogen liquefaction consumes more energy and has a greater capacity to absorb wind power, after ensuring the normal operation of the green chemical product production module, the excess wind energy is used to liquefy the hydrogen produced by the second hydrogen production facility, converting it into smaller liquid hydrogen that is easier to store within the limited space of the facility. After production, the liquid hydrogen is transferred to the liquid hydrogen storage tank for storage. In addition to absorbing the wind power absorbed by the high-pressure hydrogen compression consumption route, this route can absorb additional wind power to meet the electricity load of the hydrogen liquefaction unit.
[0030] The hydrogen stored in high-pressure gaseous hydrogen storage tanks and liquid hydrogen storage tanks and the products stored in green chemical product storage tanks (green methanol, green ammonia, etc.) can be exported through external transmission devices, or when the wind speed in the wind farm is insufficient to produce electricity to ensure the normal operation of the first hydrogen production equipment, the high-pressure hydrogen or liquid hydrogen inside can be converted into raw gas that can be used by the green chemical product production module through a hydrogen pressure reducing valve group and a liquid hydrogen regasification device to ensure its full-load production and meet the annual output requirements of green chemical products.
Claims
1. A wind abandonment and consumption type offshore green chemical product production system, characterized in that: It is used for hydrogen production from offshore wind power generation and has three power consumption routes: conventional hydrogen production consumption route, high-pressure hydrogen compression consumption route and hydrogen liquefaction consumption route; The conventional hydrogen production and consumption route is that the first hydrogen production equipment sends the produced hydrogen to the green chemical product production module, and the green chemical product production module sends the produced green chemical products to the green chemical product storage tank; The high-pressure hydrogen compression and consumption route includes the second hydrogen production equipment. The hydrogen produced by the second hydrogen production equipment is compressed by the high-pressure hydrogen compressor unit to a pressure of 20-30 MPa and transported to the high-pressure gaseous hydrogen storage tank for storage. The high-pressure gaseous hydrogen storage tank is connected to the green chemical product production module through the hydrogen pressure reducing valve group; The hydrogen liquefaction and consumption route includes a hydrogen liquefaction device. The second hydrogen production equipment liquefies the produced hydrogen through the hydrogen liquefaction device and then sends it to the liquid hydrogen storage tank. The liquid hydrogen storage tank is connected to the green chemical product production module through the liquid hydrogen regasification device. Green chemical product storage tanks, high-pressure gaseous hydrogen storage tanks, and liquid hydrogen storage tanks are connected to external transmission devices. When there is excess offshore wind power generation, the conventional hydrogen production and consumption route, high-pressure hydrogen compression and consumption route, and hydrogen liquefaction and consumption route are started and operated in sequence; The first hydrogen production equipment and the second hydrogen production equipment are alkaline water hydrogen production electrolyzers, proton exchange membrane electrolyzers, anion exchange membrane electrolyzers, or solid oxide electrolyzers.
2. The wind abandonment and consumption offshore green chemical product production system according to claim 1 is characterized in that: The seawater extraction and desalination module provides fresh water for the first hydrogen production equipment and the second hydrogen production equipment.
3. The wind abandonment and consumption type offshore green chemical product production system according to claim 2 is characterized in that: The seawater extraction and desalination module is connected to the first hydrogen production equipment and the second hydrogen production equipment through pipelines respectively; The first hydrogen production equipment is connected to the green chemical product production module and the green chemical product storage tank in sequence; The second hydrogen production equipment is connected to the high-pressure hydrogen compressor unit, high-pressure gaseous hydrogen storage tank, and hydrogen pressure reducing valve unit in sequence, and then connected to the green chemical product production module; The second hydrogen production equipment is connected to the hydrogen liquefaction device, liquid hydrogen storage tank, and liquid hydrogen regasification device in sequence through pipelines, and then connected to the green chemical product production module; High-pressure gaseous hydrogen storage tanks, liquid hydrogen storage tanks, and green chemical product storage tanks all have transmission pipelines connected to external transmission devices.
4. The wind abandonment and consumption offshore green chemical product production system according to claim 1 is characterized in that: Green chemical products include methanol and ammonia.
5. The wind abandonment and consumption offshore green chemical product production system according to claim 1 is characterized in that: The system can absorb the wind curtailment of MW and GW-level wind farms.
6. The wind abandonment and consumption offshore green chemical product production system according to claim 1 is characterized in that: The system is applied to offshore platforms, including ship-type, jack-up, semi-submersible, column-stabilized and fixed platforms.