Fuel cell power generation system based on slurry liquid hydrogen storage and production and use method

Abstract

The invention discloses a fuel cell power generation system based on slurry liquid hydrogen storage and production and a use method, and belongs to the technical field of power supply or power distribution systems. According to the fuel cell power generation system based on slurry liquid hydrogen storage and production disclosed by the invention, organic circulation of hydrogen supply, power supply and heat supply is realized by utilizing the characteristic of rapid and continuous controllable hydrogen of slurry liquid under a low-temperature condition and a mechanism of promoting a hydrogen production reaction through rapid heat consumption; the problems of high industrial hydrogen production temperature, low hydrogen production rate, tedious conditions and high energy consumption are solved. The method has the advantages of mild hydrogen production conditions, high speed, low energy consumption, high efficiency and the like. In addition, the integration level of the power generation system is improved, the hydrogen storage and production technology gives full play to the function of power peak regulation, and the system has good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply or distribution systems, and in particular to a fuel cell power generation system based on slurry liquid hydrogen storage and production and a use method thereof. Background Art

[0002] As a clean, efficient, safe and sustainable secondary energy source, hydrogen energy has the advantages of high energy density, light weight, abundant reserves and good combustion performance, which can help to absorb renewable energy on a large scale. Due to the large storage scale and long storage time of hydrogen energy storage, hydrogen energy has become a new form of energy storage in the power sector. For example, during the off-peak period of electricity consumption, surplus electricity is used to electrolyze water to produce hydrogen, and then stored in the form of high-pressure gas, low-temperature liquid, etc.; during the peak period of electricity consumption, the stored hydrogen is used to generate electricity through fuel cells or hydrogen turbine devices and connected to the public power grid. Therefore, hydrogen energy has broad application prospects in many fields such as transportation, industry, construction and electricity.

[0003] The Chinese invention patent with the publication number CN118801580A discloses a hydrogen fuel cell power generation system, including a photovoltaic module, a battery, a water electrolysis hydrogen production module, a high-pressure hydrogen storage tank, a hydrogen fuel cell, a monitoring module, and a distribution module; the photovoltaic module is connected to the load, the battery, and the water electrolysis hydrogen production module, and is used to absorb solar energy to supply the load demand or store it; the battery is used to store the excess energy after the photovoltaic module supplies the load; the water electrolysis hydrogen production module absorbs the excess energy after the battery is full to produce hydrogen. The invention coordinates photovoltaic and hydrogen fuel cells to power the load, distributes the energy of the photovoltaic module module to the load, the battery or the water electrolysis hydrogen production module according to the actual situation, and can also distribute the energy generated by the photovoltaic module module, the energy in the battery, and the energy in the high-pressure hydrogen storage tank to the load, thereby coordinating energy distribution, making full use of energy, and reducing energy waste. However, the energy consumption required for water electrolysis is large, the conditions are complex, the cost is high, and the hydrogen production speed is slow. Therefore, it is necessary to develop a hydrogen production method with low energy consumption, simple conditions, low cost, and fast hydrogen production speed.

[0004] In the Chinese invention patent with publication number CN118495469A, the inventor's research and development team disclosed a multi-media composite slurry hydrogen storage and production material and its preparation method, which includes: metal hydride for hydrolysis to produce heat and hydrogen, organic liquid hydride for endothermic catalytic hydrogen release and catalyst, wherein the content of metal hydride is 1 wt.%-45 wt.%, the content of organic liquid hydride is 50 wt.%-95 wt.%, and the content of catalyst is 1 wt.%-20 wt.%. The invention effectively improves the fluidity of metal hydride and promotes the hydrolysis hydrogenation reaction through the coating effect of organic liquid hydride; at the same time, the heat released by the hydrolysis of metal hydride is used to promote the hydrogen release reaction of metal organic liquid hydride; the continuous controllable dual hydrogen production process of multi-media composite slurry hydrogen storage material is realized, and the hydrogen production efficiency at low temperature is significantly improved. Therefore, the adoption of this scheme is a potential way to solve the technical problems in the traditional hydrogen production process. However, the slurry liquid is a high-viscosity, high-solid content fluid, and the hydrogen produced is of low purity, which is difficult to meet the use standards of fuel cells. Therefore, how to achieve rapid slurry liquid supply and hydrogen purification, and develop feasible solutions for industrial efficient utilization of multi-media composite slurry hydrogen storage and production materials are issues that need to be urgently addressed.

[0005] In summary, considering the technical barriers in the practical application of multi-media composite slurry hydrogen storage and production materials and combining their advantages and characteristics, designing and providing a fuel cell power generation system and use method based on slurry liquid hydrogen storage and production has positive significance for expanding the application of hydrogen energy. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, in the first aspect of the present invention, a fuel cell power generation system based on slurry liquid hydrogen storage and production is provided, which has the advantages of fast hydrogen supply, high energy conversion rate and utilization rate, low design cost, high integration, safety and high efficiency. The structure of the fuel cell power generation system includes a hydrogen supply module, an oxygen supply module, a fuel cell module, and a heating module. The modules are connected and transported by pipelines inside and between the modules. The hydrogen supply module includes a hydrogen production system, a purification system, a hydrogen storage system, and a hydrogen supply system. In the hydrogen production system, water and multi-media composite slurry hydrogen storage and production materials react under certain conditions and the action of catalysts to generate hydrogen. The hydrogen is purified by the purification system and stored in the hydrogen storage system, and is supplied to the fuel cell module by the hydrogen supply system. The fuel cell module uses hydrogen supplied by the hydrogen supply system and oxygen supplied by the oxygen supply module to generate water through redox reaction, converting chemical energy into electrical energy for power supply; The heating module includes a heat storage system and a heating system; The heat storage system recovers and stores the heat generated by the redox reaction; the heating system transfers the heat stored in the heat storage system to the hydrogen production system to provide heat for its reaction, thereby accelerating the hydrogen production rate of the reaction.

[0007] Preferably, the hydrogen production system includes a water tank, a slurry liquid tank, a reactor, and a heater; water and a multi-media composite slurry hydrogen storage and production material are transported to the reactor from the water tank and the slurry liquid tank, respectively, and the water is heated by the heater; the purification system includes a membrane separator, a pressure swing adsorption separator, and a purity detection device; the hydrogen storage system includes a first switch and a hydrogen storage tank; the hydrogen generated by the reactor is purified by a membrane separator and a pressure swing adsorption separator in turn, and then the purity is detected by a purity detection device until the purity reaches the use standard of the fuel cell module; when storing, the first switch is turned on, and the hydrogen is passed into the hydrogen storage tank for storage, and after the target amount of hydrogen is collected, the heater stops heating; the hydrogen supply system includes a second switch, a pressure reducing valve, a flow meter, and a regulating valve; when supplying hydrogen, the second switch is turned on, and the hydrogen is transported from the hydrogen storage tank to the fuel cell module at a certain rate under the control of the pressure reducing valve, the flow meter, and the regulating valve in turn.

[0008] Further preferably, the pipeline from the water tank, the slurry liquid tank to the reactor for feeding is provided with a diaphragm pump and a valve for adjusting the feeding rate.

[0009] Further preferably, the feed rate of the multi-media composite slurry hydrogen storage and production material is 3-10 g / min; the feed rate ratio of water to the multi-media composite slurry hydrogen storage and production material is 1:2-12.

[0010] Further preferably, the heater is used to initially start the reaction to generate hydrogen, and the heating is stopped after the reaction stabilizes.

[0011] Further preferably, a multi-stage stirring paddle is provided inside the reactor to accelerate the reaction rate.

[0012] Further preferably, the reactor is filled with a hydrogen production catalyst, which includes a Pd-based catalyst or a Pt-based catalyst, and its amount accounts for 3% of the mass of the slurry liquid.

[0013] Further preferably, a temperature sensor is provided in the reactor to control the reaction temperature to be 70-180°C.

[0014] Further preferably, a pressure sensor is provided in the reactor to control the reaction pressure to be 0.10-1.00 MPa.

[0015] Preferably, the oxygen supply module comprises an oxygen supply device, in which a flow regulating valve is provided for controlling the rate at which oxygen enters the fuel cell module.

[0016] Preferably, the fuel cell module includes a fuel cell and an electrical load; the fuel cell includes an anode region, a cathode region, a proton exchange membrane, a diffusion layer, and a catalytic layer; hydrogen is transported to the anode region, and oxygen is transported to the cathode region, and hydrogen and oxygen undergo an oxidation-reduction reaction to generate water, thereby converting chemical energy into electrical energy to supply power to the electrical load.

[0017] Preferably, the heat storage system includes a first heat exchanger, a hot water storage tank, and a water pump; the heat supply system includes a second heat exchanger; water is used as the heat storage medium, and the heat generated by the redox reaction in the fuel cell module enters the pipeline and passes through the first heat exchanger, and the heat is collected by the hot water storage tank; the water in the hot water storage tank flows through the heat exchanger to transfer the heat to the hydrogen production system.

[0018] In a second aspect of the present invention, a method for using a fuel cell power generation system based on slurry liquid hydrogen storage is provided, comprising the following steps: Initial startup phase: Turn on the water pump to pass water into the water tank and heat it with the heater; the water in the water tank and the multi-media composite slurry hydrogen storage and production material in the slurry liquid tank are fed into the reactor in a certain proportion, and react to produce hydrogen under certain conditions and the action of the catalyst; Hydrogen purification stage: The hydrogen produced by the reactor is purified by a membrane separator and a pressure swing adsorption separator in sequence, and then the purity detection device is used to detect whether the hydrogen meets the use standard of the fuel cell module; if it meets the standard, the first switch is turned on to pass the hydrogen into the hydrogen storage tank for storage; Hydrogen storage stage: When the target amount of hydrogen is collected in the hydrogen storage tank, the heater automatically stops heating; Hydrogen supply stage: Turn on the second switch, and the hydrogen in the hydrogen storage tank enters the anode area of ​​the fuel cell at a certain rate under the control of the pressure reducing valve, flow meter, and regulating valve in turn, ready for oxidation reaction; Oxygen supply phase: The oxygen supply device passes oxygen into the cathode region of the fuel cell at a certain rate in preparation for the reduction reaction; Battery power generation stage: After hydrogen and oxygen are introduced, redox reactions are carried out in the fuel cell to generate water, converting chemical energy into electrical energy to supply power to the electrical load. Heat storage stage: The heat generated during the power generation process enters the heat pipeline, passes through the first heat exchanger, and completes the heat collection of the hot water storage tank; Heating stage: The water vapor in the heat storage tank flows through the second heat exchanger, transferring the heat to the reactor. The heat absorption mechanism of the hydrogen production reaction of the multi-media composite slurry hydrogen storage and production material is utilized to accelerate the hydrogen production rate of the reaction and realize the cycle of hydrogen supply-power supply-heat supply.

[0019] Based on the above technical solutions, the design concept and principle of the present invention are as follows: The present invention is based on the multi-media composite slurry hydrogen storage and production material (CN118495469A) developed by the inventor's research and development team. The invention utilizes the rapid and efficient hydrogen production capability of the slurry liquid and the mechanism of promoting hydrogen release by absorbing internal heat, and designs a fuel cell power generation system based on slurry liquid hydrogen storage and production, which solves the problem that the slurry liquid is difficult to accurately transport hydrogen production due to high viscosity and the low purity of hydrogen, and realizes the rapid supply of hydrogen to the fuel cell. The present invention makes full use of the heat generated in the fuel cell power generation process and uses it for the preparation of hydrogen, without the need to use the external field energy of the photovoltaic device module and the external power supply, reduces the design cost of the system and the risk of dangerous accidents caused by high temperature, and at the same time improves the energy conversion rate and utilization rate, realizes a safe and efficient "hydrogen supply-power supply-heat supply" cycle, and solves the problems of high energy consumption, complicated conditions, high cost and slow hydrogen production rate in the traditional "electricity-hydrogen-electricity" mode, thereby achieving the purpose of low economy, low energy consumption, high efficiency, safety and environmental protection.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a fuel cell power generation system based on slurry liquid hydrogen storage and production, which has the advantages of rapid hydrogen supply, high energy conversion rate and utilization rate, low design cost, high integration, safety and high efficiency, and has good application prospects.

[0021] The present invention provides a method for using a fuel cell power generation system based on slurry liquid hydrogen storage and production, and realizes a safe and efficient "hydrogen supply-electricity supply-heat supply" cycle through an optimized process route. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of a fuel cell power generation system based on slurry liquid hydrogen storage; Figure 2 It is a structural schematic diagram of a fuel cell power generation system based on slurry liquid hydrogen storage; In the figure, 1: water tank; 2: slurry liquid tank; 3: reactor; 4: membrane separator; 5: pressure swing adsorber; 6: purity detection device; 7: first switch; 8: hydrogen storage tank; 9: second switch; 10: pressure reducing valve; 11: flow meter; 12: regulating valve; 13: fuel cell; 14: oxygen supply device; 15: electrical load; 16: first heat exchanger; 17: hot water storage tank; 18: second heat exchanger; 19: heater; 20: water pump. DETAILED DESCRIPTION

[0023] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. The experimental methods in the following examples without specifying specific conditions are carried out according to conventional methods and conditions, or selected according to the product specifications.

[0024] The fuel cell power generation system based on slurry liquid hydrogen storage is Figure 1 The process shown realizes a high-efficiency cycle of "hydrogen supply-power supply-heat supply". Among them, "hydrogen supply" is mainly realized by a hydrogen production system, a purification system and a hydrogen storage system; "power supply" is mainly realized by a fuel cell; "heat supply" is mainly to store and supply the hydrogen production system with the heat released during the power generation process of the fuel cell, thereby accelerating the reaction rate of the hydrogen production system. Based on various embodiments, during the low power supply period, the hydrogen production system in the "hydrogen supply" module produces excess hydrogen, and the hydrogen production rate can reach 9.5-13 sL / min. After separation and purification by the purification system, the separation efficiency can reach more than 99%, and high-purity hydrogen is obtained, which is stored in the hydrogen storage system for preservation; during the peak power supply period, the high-purity hydrogen of the hydrogen storage system and the oxygen of the oxygen supply module enter the fuel cell at a certain ratio rate to generate electricity, and the large amount of heat generated during the power generation process is directly supplied to the hydrogen production system to accelerate its hydrogen production rate, the hydrogen supply rate is also accelerated, and the power supply speed is also accelerated, which not only reduces the heat loss, but also can quickly realize the heat absorption, significantly reduce the internal temperature of the system, and avoid accidents caused by high temperature, thereby realizing a safe, efficient, low-cost and low-energy consumption cycle.

[0025] Example 1 The structure of the fuel cell power generation system based on slurry liquid hydrogen storage in this embodiment is as follows: Figure 2 As shown, it includes four parts: hydrogen supply module, oxygen supply module, fuel cell module and heating module.

[0026] Among them, the hydrogen supply module includes a hydrogen production system, a purification system, a hydrogen storage system and a hydrogen supply system. The hydrogen production system includes a water tank 1, a slurry liquid tank 2, a reactor 3, and a heater 19; water and multi-media composite slurry hydrogen storage and production materials are transported to the reactor 3 by the water tank 1 and the slurry liquid tank 2, respectively, and the water is heated by the heater 19. In the initial stage of startup, the water tank 1 and the slurry liquid tank 2 are fed at a feed rate ratio of water: multi-media composite slurry hydrogen storage and production materials = 7:1, and the feed rate of the multi-media composite slurry hydrogen storage and production materials into the reactor 3 is 7 g / min; the water is heated to 130 °C by the heater 19 to vaporize the water, and a rapid and efficient hydrogen production reaction is carried out under the catalysis of the efficient hydrogen production Pd-based catalyst in the reactor 3 and the stirring action of the multi-stage stirring paddle.

[0027] The purification system includes a membrane separator 4, a pressure swing adsorber 5, and a purity detection device 6; the hydrogen storage system includes a first switch 7 and a hydrogen storage tank 8. During the hydrogen purification stage, the gas with low purity is sequentially passed to the membrane separator 4 and the pressure swing adsorber 5 for separation and purification. The purified hydrogen is tested under the purity detection device 6. If it meets the use standard of the fuel cell, the first switch 7 is opened to pass the high-purity hydrogen into the hydrogen storage tank 8 for storage. During the hydrogen storage stage, when a certain amount of hydrogen is stored in the hydrogen storage tank 8, the heater 19 automatically stops heating.

[0028] The hydrogen supply system includes a second switch 9, a pressure reducing valve 10, a flow meter 11, and a regulating valve 12. In the hydrogen supply stage, the switch 9 is turned on, and the hydrogen in the hydrogen storage tank 8 enters the anode area of ​​the fuel cell 13 at a certain rate under the control of the pressure reducing valve 10, the flow meter 11, and the regulating valve 12, and is ready for oxidation reaction.

[0029] The oxygen supply module includes an oxygen supply device 14, in which a flow regulating valve is provided to control the rate at which oxygen enters the fuel cell module. During the oxygen supply phase, the oxygen supply device 14 passes oxygen into the cathode region of the fuel cell 13 at a certain rate to prepare for the reduction reaction.

[0030] The fuel cell module includes a fuel cell 13 and an electrical load 15; the fuel cell 13 includes an anode region, a cathode region, a proton exchange membrane, a diffusion layer, and a catalyst layer. During the battery power generation stage, after hydrogen and oxygen are introduced into the anode region and the cathode region respectively at a supply rate ratio of 2.5:1, the fuel cell 13 performs a redox reaction to convert chemical energy into electrical energy to supply power to the electrical load 15. The heat storage system includes a first heat exchanger 16, a hot water storage tank 17, and a water pump 20; the heat supply system includes a second heat exchanger 18. With water as the heat storage medium, during the heat storage stage, the heat generated during the power generation process enters the heat pipeline, passes through the first heat exchanger 16, and completes the heat collection of the hot water storage tank 17; during the heating stage, the high-temperature water vapor in the hot water storage tank 17 flows through the second heat exchanger 18, and transfers the heat to the reactor 3, utilizing the heat absorption mechanism of the slurry hydrogen production reaction to accelerate the hydrogen production rate of the reaction, and realize the high-efficiency cycle of "hydrogen supply-power supply-heat supply".

[0031] Example 2 This embodiment is basically the same as the embodiment 1, except that the water tank 1 and the slurry liquid tank 2 are fed into the reactor 3 at a feed rate ratio of 10:1 to carry out hydrogen production reaction.

[0032] This embodiment realizes the cycle of "hydrogen supply-power supply-heat supply", but the power supply performance of the fuel cell is reduced, and the heat supply rate is reduced. Since the reaction between water and slurry liquid is an exothermic reaction, and the hydrogen production by the multi-media composite slurry hydrogen storage and production material in the slurry liquid is an endothermic reaction, the temperature of the main reaction zone of the hydrogen production reactor increases significantly, and the pressure inside the reactor also reaches a peak here. When the water feed rate is further increased, the hydrogen production rate does not increase significantly, but the excess water will take away a large amount of heat generated by the hydrogen production reaction, the temperature of the reaction zone drops, the hydrogen production reaction rate decreases, the system pressure decreases, and hydrogen cannot be supplied quickly and timely, resulting in a decrease in the power supply efficiency of the fuel cell and less heat released.

[0033] Example 3 This embodiment is basically the same as Embodiment 1, with the only difference being that the slurry liquid tank 2 feeds the multi-media composite slurry hydrogen storage and production material into the reactor 3 at a feed rate of 8 g / min.

[0034] This embodiment realizes the cycle of "hydrogen supply-electricity supply-heat supply". The increase in feed rate causes the residence time of the slurry in the multi-stage stirring impeller to become shorter and shorter, and the conversion rate of the slurry liquid decreases, resulting in waste of raw materials. The hydrogen production rate is not significantly improved compared to 7 g / min, and the power supply efficiency of the fuel cell is not significantly improved.

[0035] Example 4 This embodiment is basically the same as the embodiment 1, except that, in the initial stage of startup, the heater 19 heats the temperature of the reactor 3 to 150°C.

[0036] This embodiment realizes the cycle of "hydrogen supply-power supply-heat supply". Due to the increase in temperature, the reaction between water and slurry liquid is more intense, the molecular collision opportunities are more, the hydrogen production reaction rate is faster, and more high-purity hydrogen can be obtained in the hydrogen storage tank per unit time. The power supply power of the fuel cell is increased, more heat is released, and the heating system can supply more heat.

[0037] In summary, by using a multi-media composite slurry hydrogen storage material for rapid hydrogen production at low temperature, the system of the present invention is used to solve the problem that the slurry liquid is difficult to accurately transport hydrogen production due to high viscosity and the low purity of hydrogen, and the supply of hydrogen for fuel cell power generation is completed. The heat generated during the power generation process can be stored and utilized in time to accelerate the hydrogen release rate of the slurry liquid, thereby realizing the low energy consumption and high efficiency cycle of "hydrogen supply-heat supply-hydrogen supply". This system is not only superior to the high cost, complex conditions, and slow hydrogen production rate of the existing "electricity-hydrogen-electricity" mode that requires photovoltaic device modules, but also the rapid and efficient production of hydrogen can meet the needs of fuel cells for timely hydrogen supply to cope with sudden power supply interruptions. At the same time, the rapid heat absorption mechanism of the slurry liquid can maintain the entire fuel cell power generation system at a relatively normal temperature, reducing the risk of accidents caused by high temperature. Therefore, the hydrogen production rate of the fuel cell power generation system based on slurry liquid storage and hydrogen production is significantly improved, the hydrogen production temperature is reduced, and the reaction production conditions are simplified, with the advantages of low energy consumption and high energy utilization.

[0038] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A fuel cell power generation system based on slurry liquid hydrogen storage, characterized in that: The structure includes a hydrogen supply module, an oxygen supply module, a fuel cell module, and a heating module. Materials are transported inside and between the modules through pipelines; the hydrogen supply module includes a hydrogen production system, a purification system, a hydrogen storage system, and a hydrogen supply system; in the hydrogen production system, water and a multi-media composite slurry hydrogen storage and production material react under certain conditions and the action of a catalyst to generate hydrogen; the hydrogen is purified by the purification system and stored in the hydrogen storage system, and is supplied to the fuel cell module by the hydrogen supply system; the fuel cell module uses the hydrogen supplied by the hydrogen supply system and the oxygen supplied by the oxygen supply module to generate water through an oxidation-reduction reaction, and converts chemical energy into electrical energy for power supply; the heating module includes a heat storage system and a heating system; the heat storage system recovers and stores heat generated by the oxidation-reduction reaction; the heating system transfers the heat stored in the heat storage system to the hydrogen production system to provide heat for its reaction, so as to accelerate the hydrogen production rate of the reaction.

2. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 1 is characterized in that: The hydrogen production system comprises a water tank (1), a slurry liquid tank (2), a reactor (3), and a heater (19); water and a multi-media composite slurry hydrogen storage and production material are transported from the water tank (1) and the slurry liquid tank (2) to the reactor (3), and the water is heated by the heater (19); the purification system comprises a membrane separator (4), a pressure swing adsorption separator (5), and a purity detection device (6); the hydrogen storage system comprises a first switch (7) and a hydrogen storage tank (8); the hydrogen generated by the reactor (3) is purified by the membrane separator (4) and the pressure swing adsorption separator (5) in sequence, and then The purity is tested by a purity testing device (6) until the purity reaches the standard for use of the fuel cell module; when storing, the first switch (7) is opened to pass the hydrogen into the hydrogen storage tank (8) for storage, and after the target amount of hydrogen is collected, the heater (19) stops heating; the hydrogen supply system comprises a second switch (9), a pressure reducing valve (10), a flow meter (11), and a regulating valve (12); when supplying hydrogen, the second switch (9) is opened, and the hydrogen is sequentially regulated by the pressure reducing valve (10), the flow meter (11), and the regulating valve (12) and transported from the hydrogen storage tank (8) to the fuel cell module at a certain rate.

3. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 2 is characterized in that: The pipeline for feeding from the water tank (1) and the slurry liquid tank (2) to the reactor (3) is provided with a diaphragm pump and a valve for adjusting the feeding rate.

4. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 2, characterized in that: The feed rate of the multi-media composite slurry hydrogen storage and production material is 3-10 g / min; The feed rate ratio of water and multi-media composite slurry hydrogen storage and production materials is 1:2-12.

5. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 2 is characterized in that: The heater (19) is used to initially start the reaction to generate hydrogen, and the heating is stopped after the reaction stabilizes.

6. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 2, characterized in that: The reactor (3) is provided with a multi-stage stirring blade inside; a hydrogen production catalyst is installed inside the reactor (3), and the hydrogen production catalyst includes a Pd-based catalyst or a Pt-based catalyst, and the amount thereof accounts for 3% of the mass of the slurry liquid; a temperature sensor is provided in the reactor (3) to control the reaction temperature to be 70-180°C; and a pressure sensor is provided in the reactor (3) to control the reaction pressure to be 0.10-1.00 MPa.

7. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 1 is characterized in that: The oxygen supply module comprises an oxygen supply device (14), and a flow regulating valve is provided in the oxygen supply device (14).

8. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 1 is characterized in that: The fuel cell module comprises a fuel cell (13) and an electrical load (15); the fuel cell (13) comprises an anode region, a cathode region, a proton exchange membrane, a diffusion layer, and a catalyst layer; hydrogen is transported to the anode region, and oxygen is transported to the cathode region; hydrogen and oxygen undergo an oxidation-reduction reaction to generate water, thereby converting chemical energy into electrical energy to supply power to the electrical load (15).

9. The fuel cell power generation system based on slurry liquid hydrogen storage and production according to claim 1, characterized in that: The heat storage system comprises a first heat exchanger (16), a hot water storage tank (17), and a water pump (20); the heat supply system comprises a second heat exchanger (18); water is used as a heat storage medium, and heat generated by a redox reaction in a fuel cell module enters a pipeline and passes through the first heat exchanger (16), and the heat is collected by the hot water storage tank (17); water in the hot water storage tank (17) flows through the heat exchanger (18), and the heat is transferred to the hydrogen production system.

10. A method for using a fuel cell power generation system based on slurry liquid hydrogen storage, characterized in that: The steps include: Initial startup stage: start the water pump (20) to pass water into the water tank (1), and use the heater (19) to heat it; the water in the water tank (1) and the multi-medium composite slurry hydrogen storage and production material in the slurry liquid tank (2) are fed into the reactor (3) according to a certain ratio, and react to produce hydrogen under certain conditions and the action of a catalyst; Hydrogen purification stage: the hydrogen produced by the reactor (3) is purified by passing through a membrane separator (4) and a pressure swing adsorption separator (5) in sequence, and then passing through a purity detection device (6) to detect whether the hydrogen meets the use standard of the fuel cell module; if the standard is met, the first switch (7) is turned on to pass the hydrogen into a hydrogen storage tank (8) for storage; Hydrogen storage stage: when the target amount of hydrogen is collected in the hydrogen storage tank (8), the heater (19) automatically stops heating; Hydrogen supply stage: the second switch (9) is turned on, and the hydrogen in the hydrogen storage tank (8) enters the anode area of ​​the fuel cell (13) at a certain rate under the control of the pressure reducing valve (10), the flow meter (11), and the regulating valve (12) in sequence, and is ready to undergo an oxidation reaction; Oxygen supply stage: the oxygen supply device (14) introduces oxygen into the cathode region of the fuel cell (13) at a certain rate to prepare for the reduction reaction; Battery power generation stage: After hydrogen and oxygen are introduced, a redox reaction is carried out in the fuel cell (13) to generate water, converting chemical energy into electrical energy to supply power to the electrical load (15); Heat storage stage: the heat generated during the power generation process enters the heat pipeline, passes through the first heat exchanger (16), and completes the heat collection in the hot water storage tank (17); Heating stage: the water vapor in the hot water storage tank (17) flows through the second heat exchanger (18) to transfer heat to the reactor (3), and the heat absorption mechanism of the hydrogen production reaction of the multi-media composite slurry hydrogen storage material is utilized to accelerate the hydrogen production rate of the reaction, thereby realizing the cycle of hydrogen supply-power supply-heat supply.

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