A wind-solar-hydrogen-storage multi-energy complementary backup power supply device

Abstract

The utility model discloses a wind-solar hydrogen storage multi-energy complementary standby power supply device, which relates to the technical field of fuel cell system application, and comprises a hydrogen power generation system, a wind-solar power generation system and a rainwater hydrogen production system which are interconnected in pairs, a solid-state hydrogen storage device, a switch valve, a proportional valve, an ejector, an air-cooled stack, an air guide cover, a heat exchanger and a heater which are sequentially connected to form a power generation and hydrogen supply circulation loop, an outlet of a first gas-water separator is connected to a reflux port of the ejector to form an ejector reflux circulation loop, the heat exchanger is also sequentially connected to a first water pump, the first water pump is connected to a water tank to form a water circulation loop, an electrolyzer, a second water pump and a water replenishment tank are sequentially connected to form a water electrolysis hydrogen production circulation loop, a second gas-water separator is provided at the hydrogen outlet end of the electrolyzer, and the second gas-water separator is connected to a dryer; the technical scheme in the application combines three renewable energy sources of wind energy, solar energy and hydrogen energy, which can complement each other when wind energy, solar energy or hydrogen energy is insufficient, thereby improving the reliability and stability of the power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell system applications, and in particular to a wind-solar-hydrogen storage multi-energy complementary standby power supply device. Background Art

[0002] With the rapid development of hydrogen fuel cell technology, proton exchange membrane fuel cells, as a new energy device, can quickly start at room temperature, have high efficiency, low noise and no pollution. In view of the fact that the traditional communication base station power supply uses gasoline / diesel generators for power generation, which has the disadvantages of environmental unfriendly carbon emission costs and rising costs, hydrogen fuel cells can make up for this deficiency by replacing them as the main power supply. The current base station power supply system structure is mainly composed of mains power supply and mobile diesel engine power supply. When the mains input power supply is normal, the mains power supply supplies power to the load in the base station. After the mains power supply is interrupted, electrochemical batteries such as lead-acid batteries or lithium-ion batteries supply power to the base station communication load, and the diesel generator set is started at the same time; after the mains input power supply is restored, it switches back to the mains side to supply power to the load in the base station. If the diesel generator set is simply replaced with a hydrogen fuel cell power generation system, it will face the problem of power generation sustainability caused by the difficulty in storing and transporting hydrogen fuel. However, in areas with rich wind and solar resources, it is very beneficial to achieve wind and solar hydrogen production and then generate electricity, which is the current key development technology area.

[0003] This application aims at the problem of hydrogen fuel cell backup power supply for generating electricity by using wind and solar power to produce hydrogen, and proposes a wind and solar power hydrogen storage multi-energy complementary backup power supply device, which can simultaneously realize wind and solar power hydrogen storage and combined power generation, improve the utilization rate of clean energy and reduce carbon emissions. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the utility model is to provide a wind-solar-hydrogen-storage multi-energy complementary backup power supply device, aiming to solve the technical problems in the related technology to a certain extent.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A wind-solar hydrogen storage multi-energy complementary backup power supply device, comprising a hydrogen power generation system, a wind-solar power generation system and a rainwater hydrogen production system interconnected in pairs, wherein the hydrogen power generation system comprises a solid hydrogen storage device, a switch valve, a proportional valve, an ejector, an air-cooled stack, an air guide cover, a heat exchanger, and a heater, which are sequentially connected to form a power generation and hydrogen supply circulation loop, the hydrogen outlet of the air-cooled stack is connected to a first gas-water separator, the outlet of the first gas-water separator is connected to the ejector reflux port to form an ejector reflux circulation loop, the heat exchanger is also sequentially connected to a first water pump, and the first water pump is connected to The water tank forms a water circulation loop; the wind-solar power generation system includes a wind-solar power generation group, a city power group and a base station load, the city power group is connected to a rectifier module, and the base station load is connected to a first voltage stabilizing module; the rainwater hydrogen production system includes an electrolyzer, a second water pump and a water supply tank which are connected in sequence to form an electrolytic water hydrogen production circulation loop, a second gas-water separator is provided at the hydrogen outlet end of the electrolyzer, the second gas-water separator is connected to a dryer, the dryer is connected to a solid-state hydrogen storage device, the water supply tank is connected to a deionized water tank, the deionized water tank is connected to a deionizer, and the deionizer is connected to a water storage tank.

[0007] On the basis of the above technical solution, a second voltage stabilizing module is further provided between the electrolyzer and the wind-solar power generation group. The second voltage stabilizing module is used to adjust the power generation voltage of the wind-solar power generation group and then supply the power to the electrolyzer to produce hydrogen.

[0008] On the basis of the above technical solution, the electrolyzer is also provided with an oxygen outlet and is introduced into the cathode inlet of the air-cooled stack through a pipeline.

[0009] On the basis of the above technical solution, a rainwater collector is provided at the top of the water tank, and an opening is provided at the top of the rainwater collector for gathering and collecting rainwater.

[0010] On the basis of the above technical solution, a filter is further provided between the deionizer and the water storage tank, and the filter is a particle filter and is used to remove impurity particles in rainwater.

[0011] On the basis of the above technical solution, a tail valve is provided at the bottom outlet of the first gas-water separator, and the tail valve is connected to the external atmosphere and discharges the water generated by the first gas-water separator.

[0012] Based on the above technical solution, a fan is provided at the air path inlet section of the air-cooled fuel cell stack.

[0013] On the basis of the above technical solution, the wind-solar power generation group includes a solar power generation device and a wind power generation device, and the municipal power group is connected to the municipal power grid.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] Compared with the prior art, the wind-solar-hydrogen-storage multi-energy complementary backup power supply device in the utility model has the following advantages: first, it integrates a hydrogen energy storage system, produces hydrogen through water electrolysis or directly uses surplus wind and solar power for hydrogen production, converts unstable renewable energy into chemical energy storage, and increases the flexibility of the system; second, it combines three renewable energy sources of wind energy, solar energy and hydrogen energy, which can complement each other when wind energy, solar energy or hydrogen energy is insufficient, thereby improving the reliability and stability of the power supply; third, it achieves a high proportion of renewable energy utilization and reduces dependence on fossil fuels. The entire system is clean and pollution-free during operation, which is beneficial to environmental protection and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a wind-solar-hydrogen storage multi-energy complementary backup power supply device in an embodiment of the utility model.

[0017] In the figure: 1-solid-state hydrogen storage device, 2-switch valve, 3-proportional valve, 4-ejector, 5-air-cooled fuel cell, 6-wind guide cover, 7-heat exchanger, 8-heater, 9-first water pump, 10-water tank, 11-first gas-water separator, 12-tail exhaust valve, 13-fan, 14-wind-solar power generation group, 15-mains power group, 16-rectifier module, 17-first voltage stabilizing module, 18-base station load, 19-second voltage stabilizing module, 20-electrolyzer, 21-second gas-water separator, 22-dryer, 23-second water pump, 24-water supply tank, 25-deionized water tank, 26-deionizer, 27-filter, 28-water storage tank, 29-rainwater collector. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0019] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0020] In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0021] See Figure 1The schematic diagram of the structure of a wind-solar-hydrogen storage multi-energy complementary backup power supply device in the embodiment of the utility model is shown, and the wind-solar-hydrogen storage multi-energy complementary backup power supply device includes a hydrogen power generation system, a wind-solar power generation system and a rainwater hydrogen production system. The hydrogen power generation system, the wind-solar power generation system and the rainwater hydrogen production system are interconnected in pairs to exchange material and electrical energy. The hydrogen power generation system supplies power to the base station load 18 externally, and the wind-solar power generation system supplies power to the base station load 18 and the rainwater hydrogen production system externally. The rainwater hydrogen production system receives external power to electrolyze water to produce hydrogen.

[0022] In the present application, the hydrogen energy power generation system is provided with a solid-state hydrogen storage device 1, a switch valve 2, a proportional valve 3, an ejector 4, an air-cooled stack 5, an air guide hood 6, a heat exchanger 7, and a heater 8. The above devices are connected in sequence to form a power generation and hydrogen supply cycle. The air-cooled stack 5 is a graphite bipolar plate hydrogen fuel cell stack with a maximum power supply voltage of 54V. It adopts an open cathode flow channel and is suitable for low-power air-cooled application scenarios without the need for air compressor equipment. The solid-state hydrogen storage device 1 supplies hydrogen to the air-cooled stack 5 for power generation, and the switch valve 2 and the proportional valve 3 form an intake valve group to control the on-off and amount of hydrogen supply. The ejector 4 is a single-stage ejector adapted to the low-power stack hydrogen supply system. The ejector 4 forms an ejection cycle for the hydrogen entering the stack; the air guide 6 guides the hot air out of the stack to the heat exchanger 7, and the heater 8 heats the circulating water to heat the solid-state hydrogen storage device 1 to generate hydrogen.

[0023] The hydrogen outlet of the air-cooled fuel cell 5 is connected to the first gas-water separator 11, and the outlet of the first gas-water separator 11 is connected to the reflux port of the ejector 4 to form an ejector reflux circulation loop. The bottom outlet of the first gas-water separator 11 is provided with a tail valve 12, which is connected to the external atmosphere and discharges the water generated by the first gas-water separator 11. The first gas-water separator 11 separates the water out of the stack and then circulates it to ensure that the air-cooled fuel cell 5 is not blocked or flooded during operation. The heat exchanger 7 is also connected to the first water pump 9 in sequence. The first water pump 9 is connected to the water tank 10 to form a water circulation loop; the heat exchanger 7 can use the heat of the hot air out of the stack to add circulating water.

[0024] The wind-solar power generation system in the present application includes a wind-solar power generation group 14, a city power group 15 and a base station load 18. The city power group 15 is connected to a rectifier module 16, and the base station load 18 is connected to a first voltage stabilizing module 17. The first voltage stabilizing module 17 processes the power supply from different external sources (hydrogen, wind, light) into the power supply required by the base station load 18.

[0025] In this embodiment, a complete rainwater treatment system is provided, which can directly electrolyze and produce hydrogen for reuse by filtering dirty rainwater in multiple stages. The rainwater hydrogen production system includes an electrolyzer 20, a second water pump 23 and a water supply tank 24 connected in sequence to form a water electrolysis hydrogen production cycle. The hydrogen outlet of the electrolyzer 20 is provided with a second gas-water separator 21, the second gas-water separator 21 is connected to a dryer 22, the dryer 22 is connected to a solid hydrogen storage device 1, the water supply tank 24 is connected to a deionized water tank 25, the deionized water tank 25 is connected to a deionizer 26, and the deionizer 26 is connected to a water storage tank 28.

[0026] A second voltage stabilizing module 19 is also provided between the electrolyzer 20 and the wind-solar power generation group 14. The second voltage stabilizing module 19 is used to adjust the power generation voltage of the wind-solar power generation group 14 and then supply the power to the electrolyzer 20 to produce hydrogen. The second voltage stabilizing module 19 matches the power supply parameters required by the corresponding electrolyzer 20. The rectifier module 16 is a 54V rectifier module that processes the AC power into a 54V DC power supply.

[0027] In this embodiment, an open cathode air-cooled stack is adopted, and a fan 13 is provided at the air path inlet section of the air-cooled stack 5. The fan 13 can not only supply oxygen to the air-cooled stack 5 to participate in the redox reaction, but also perform the dual functions of heat dissipation and cooling. The electrolyzer 20 is also provided with an oxygen outlet and introduced into the cathode inlet of the air-cooled stack 5 through a pipeline, so that the oxygen byproduct produced by the electrolysis of water to produce hydrogen in the electrolyzer 20 is reused, and a higher oxygen concentration can improve the power generation performance of the air-cooled stack 5.

[0028] A rainwater collector 29 is provided at the top of the water storage tank 28. The top of the rainwater collector 29 is provided with an opening for gathering and collecting rainwater. The rainwater collector 29 is arranged at the highest position of a wind-solar-hydrogen storage multi-energy complementary backup power supply device in the present application.

[0029] A filter 27 is also provided between the deionizer 26 and the water storage tank 28. The filter 27 is a particle filter and is used to remove impurity particles in the rainwater, ensuring that the rainwater can be directly used for hydrogen production after being collected and processed.

[0030] The wind and solar power generation group 14 includes a solar power generation device and a wind power generation device, and the mains power group 15 is connected to the municipal power grid. The solar power generation device converts solar energy into electrical energy, the wind power generation device uses wind power generation for power supply, and the mains power group 15 converts the municipal 220V AC power into the power supply parameters required by the electrolyzer 20 and the base station load 18 for power supply.

[0031] This application integrates multiple energy technologies, including wind power generation technology, solar photovoltaic technology, energy storage technology, hydrogen energy technology, etc., and is equipped with an intelligent control system that can automatically adjust the working status of each part and optimize system operation according to changes in wind and solar resources, load demand and hydrogen energy storage status.

[0032] Although the technical solution in this application may require a high initial investment, in the long run, due to the reduced dependence on fossil fuels, the operating cost is low and it helps reduce greenhouse gas emissions. It is particularly suitable for places that are not covered by the power grid, such as remote areas, islands, and areas without electricity, or as a supplement to the main power grid, providing more flexible and reliable power support.

[0033] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A wind-solar-hydrogen-storage multi-energy complementary backup power supply device, characterized in that: The invention comprises a hydrogen power generation system, a wind-solar power generation system and a rainwater hydrogen production system which are interconnected in pairs, wherein the hydrogen power generation system comprises a solid hydrogen storage device (1), a switch valve (2), a proportional valve (3), an ejector (4), an air-cooled stack (5), an air guide cover (6), a heat exchanger (7) and a heater (8), which are sequentially connected to form a power generation and hydrogen supply circulation loop, the hydrogen outlet of the air-cooled stack (5) is connected to a first gas-water separator (11), the outlet of the first gas-water separator (11) is connected to a reflux port of the ejector (4) to form an ejector reflux circulation loop, and the heat exchanger (7) is also sequentially connected to a first water pump (9), and the first water pump (9) is connected to a water tank (10) to form a water circulation loop; The wind-solar power generation system comprises a wind-solar power generation group (14), a city power group (15) and a base station load (18); the city power group (15) is connected to a rectifier module (16), and the base station load (18) is connected to a first voltage stabilization module (17); The rainwater hydrogen production system comprises an electrolyzer (20), a second water pump (23) and a water supply tank (24) which are connected in sequence to form a water electrolysis hydrogen production circulation loop; a second gas-water separator (21) is provided at the hydrogen outlet of the electrolyzer (20); the second gas-water separator (21) is connected to a dryer (22); the dryer (22) is connected to a solid hydrogen storage device (1); the water supply tank (24) is connected to a deionized water tank (25); the deionized water tank (25) is connected to a deionizer (26); and the deionizer (26) is connected to a water storage tank (28).

2. According to claim 1, a wind-solar-hydrogen-storage multi-energy complementary backup power supply device is characterized in that: A second voltage stabilizing module (19) is also provided between the electrolyzer (20) and the wind-solar power generation group (14), and the second voltage stabilizing module (19) is used to adjust the power generation voltage of the wind-solar power generation group (14) and then supply the power to the electrolyzer (20) to produce hydrogen.

3. According to claim 1, a wind-solar-hydrogen-storage multi-energy complementary backup power supply device is characterized in that: The electrolytic cell (20) is also provided with an oxygen outlet end which is introduced into the cathode inlet of the air-cooled stack (5) through a pipeline.

4. According to claim 1, a wind-solar-hydrogen-storage multi-energy complementary backup power supply device is characterized in that: A rainwater collector (29) is provided at the top of the water storage tank (28). The top of the rainwater collector (29) is provided with an opening and is used to gather and collect rainwater.

5. The wind-solar-hydrogen-storage multi-energy complementary backup power supply device according to claim 1 is characterized in that: A filter (27) is also provided between the deionizer (26) and the water storage tank (28); the filter (27) is a particle filter and is used to remove foreign particles in rainwater.

6. The wind-solar-hydrogen-storage multi-energy complementary backup power supply device according to claim 1 is characterized in that: A tail discharge valve (12) is provided at the bottom outlet of the first gas-water separator (11); the tail discharge valve (12) is connected to the external atmosphere and discharges water generated by the first gas-water separator (11).

7. The wind-solar-hydrogen-storage multi-energy complementary backup power supply device according to claim 1 is characterized in that: A fan (13) is provided at the air path inlet section of the air-cooled fuel cell stack (5).

8. The wind-solar-hydrogen-storage multi-energy complementary backup power supply device according to claim 1 is characterized in that: The wind-solar power generation group (14) comprises a solar power generation device and a wind power generation device, and the municipal power group (15) is connected to the municipal power grid.

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