Power supply and power supply system

Abstract

The invention relates to a power supply and a power supply system, the power supply comprises a hydrogen fuel cell power generation module and a hybrid hydrogen storage module, the hybrid hydrogen storage module comprises a first hydrogen storage device and a second hydrogen storage device, hydrogen is stored in the first hydrogen storage device and the second hydrogen storage device, and the first hydrogen storage device and the second hydrogen storage device are connected with the hydrogen fuel cell power generation module; the first hydrogen storage device and the second hydrogen storage device can provide hydrogen for the hydrogen fuel cell power generation module. The reaction product of the hydrogen fuel cell power generation module is water, no waste gas is discharged, the environment-friendly effect is achieved, meanwhile, the first hydrogen storage device achieves quick response to achieve timely power supply, the second hydrogen storage device is arranged to continuously supply hydrogen, and the power supply time can be prolonged. The reliability and the environmental protection performance are improved.

Description

Technical Field

[0001] This application relates to the field of power supply equipment, and particularly to a power supply and a power supply system. Background Art

[0002] The emergency power supply system of a nuclear power plant is a key guarantee for the safe operation of the nuclear power plant. Its main function is to quickly start and provide emergency power when both the main power supply and the auxiliary power supply fail, ensuring the safe shutdown of the reactor and the normal operation of the cooling system to prevent equipment damage. In related technologies, emergency diesel generators are usually used as emergency power supplies in nuclear power plants. However, they contain mechanical rotating equipment, with a high risk of startup failure, complex systems, high failure rates, and pollutants such as carbon dioxide and particles are generated during diesel combustion. Summary of the Invention

[0003] This application provides a power supply and a power supply system to overcome the deficiencies of traditional diesel generators in terms of reliability and environmental protection performance.

[0004] In a first aspect, this application provides a power supply, including:

[0005] A hydrogen fuel cell power generation module;

[0006] A hybrid hydrogen storage module, including a first hydrogen storage device and a second hydrogen storage device. The first hydrogen storage device and the second hydrogen storage device are respectively connected to the hydrogen fuel cell power generation module; the first hydrogen storage device and the second hydrogen storage device sequentially supply hydrogen to the hydrogen fuel cell power generation module for the hydrogen fuel cell power generation module to convert electrical energy.

[0007] Further, both the first hydrogen storage device and the second hydrogen storage device adopt solid-state hydrogen storage technology; the temperature required for the first hydrogen storage device to release hydrogen is lower than the temperature required for the second hydrogen storage device to release hydrogen.

[0008] Further, the first hydrogen storage device uses titanium-manganese alloy to store hydrogen; and / or, the second hydrogen storage device uses magnesium-based solid-state hydrogen storage.

[0009] Further, a hydrogen release valve is provided on the pipeline connecting the second hydrogen storage device and the hydrogen fuel cell power generation module.

[0010] Further, it further includes a hydrogen cooler, which is connected to the hydrogen release valve and is used to cool the hydrogen passing through the hydrogen release valve.

[0011] Further, it further includes a hydrogen temporary storage tank, and the hydrogen outlet end of the hydrogen temporary storage tank is connected to the hydrogen inlet end of the hydrogen fuel cell power generation module;

[0012] The hydrogen output end of the first hydrogen storage device is connected to the hydrogen input end of the hydrogen storage tank; the second hydrogen storage device is connected to the hydrogen input end of the hydrogen storage tank, and a hydrogen release valve is provided on the pipeline connecting the second hydrogen storage device and the hydrogen storage tank.

[0013] Further, a heating device is further included, and the heating device is connected to the second hydrogen storage device; the heating device is used to provide the temperature required for releasing hydrogen for the second hydrogen storage device.

[0014] Further, the heating device includes:

[0015] A heat conduction furnace, the flue gas discharge end of the heat conduction furnace is connected to the flue gas inlet end of the second hydrogen storage device;

[0016] A fuel storage tank, the discharge end of the fuel storage tank is connected to the feed end of the heat conduction furnace, and the fuel storage tank provides fuel for the heat conduction furnace.

[0017] Further, an air preheater is further included, the flue gas discharge end of the second hydrogen storage device is connected to the flue gas recovery end of the air preheater; the exhaust end of the air preheater is connected to the intake end of the heat conduction furnace;

[0018] Wherein, air enters the air preheater from the intake end of the air preheater, and after heat exchange with the flue gas entering from the flue gas recovery end of the air preheater, it is discharged from the exhaust end of the air preheater to the intake end of the heat conduction furnace.

[0019] Further, the flue gas discharge end of the second hydrogen storage device is connected to the intake end of the heat conduction furnace;

[0020] Wherein, a part of the flue gas discharged from the flue gas discharge end of the second hydrogen storage device is mixed with the air discharged from the exhaust end of the air preheater and then enters the heat conduction furnace from the intake end of the heat conduction furnace.

[0021] Further, the hydrogen fuel cell power generation module includes:

[0022] A hydrogen fuel cell device, the hydrogen intake end of the hydrogen fuel cell device is connected to the hydrogen output end of the hybrid hydrogen storage module;

[0023] A DC converter, the current output end of the hydrogen fuel cell device is connected to the current input end of the DC converter;

[0024] A power conversion system, the input end of the power conversion system is connected to the voltage output end of the DC converter, and the power conversion system outputs alternating current.

[0025] Further, the number of the hydrogen fuel cell devices is multiple, and the number of the DC converters is multiple. The hydrogen fuel cell devices and the DC converters are connected in one-to-one correspondence. The hydrogen inlet end of each hydrogen fuel cell device is connected to the hydrogen outlet end of the hybrid hydrogen storage module, and the current output end of each DC converter is connected to the input end of the power conversion system.

[0026] Further, a heat exchange system is further included. The hydrogen fuel cell device and the first hydrogen storage device are both connected to the heat exchange system;

[0027] Wherein, the heat exchange system takes away the heat generated by the hydrogen fuel cell device to provide the temperature required for the first hydrogen storage device to release hydrogen.

[0028] Further, the heat exchange system includes a cooling tower and a three-way valve. The water outlet end of the cooling tower is connected to the water inlet end of the hydrogen fuel cell device, and the water outlet end of the hydrogen fuel cell device is connected to the water inlet end of the cooling tower;

[0029] A three-way valve is provided on the connection pipeline between the cooling tower and the hydrogen fuel cell device. The water inlet end of the first hydrogen storage device is connected to the three-way valve, and the water outlet end of the first hydrogen storage device is connected to the water inlet end of the cooling tower.

[0030] In a second aspect, the present application provides a power supply system, which includes multiple power supplies as described above, and the multiple power supplies are arranged in parallel.

[0031] The above technical solutions provided by the present application have the following advantages compared with the prior art:

[0032] In the technical solution of the present application, the power supply includes a hydrogen fuel cell power generation module and a hybrid hydrogen storage module. The hybrid hydrogen storage module includes a first hydrogen storage device and a second hydrogen storage device. The first hydrogen storage device and the second hydrogen storage device store hydrogen respectively and are respectively connected to the hydrogen fuel cell power generation module. The first hydrogen storage device and the second hydrogen storage device can provide hydrogen for the hydrogen fuel cell power generation module. After the hydrogen fuel cell power generation module obtains hydrogen, a chemical reaction occurs, and the chemical energy is converted into electrical energy to achieve the purpose of power generation. The reaction product of the hydrogen fuel cell power generation module is water, without waste gas emission, achieving an environmental protection effect. At the same time, there is no mechanical rotation part in the hydrogen fuel cell power generation module, and the failure rate is low. At the same time, in the present application, the first hydrogen storage device and the second hydrogen storage device are provided. In an emergency, the first hydrogen storage device releases hydrogen to supply electrical energy for the hydrogen fuel cell. After a period of time, the second hydrogen storage device releases hydrogen to continue to supply electrical energy for the hydrogen fuel cell. In this way, the first hydrogen storage device can respond quickly to achieve timely power supply, and the second hydrogen storage device is set to continuously supply hydrogen, which can extend the power supply time. The present application overcomes the technical problems existing in the traditional emergency diesel generator system and improves the reliability and environmental protection performance. Brief Description of the Drawings

[0033] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] One or more embodiments are illustrated by way of example in the pictures of the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise stated, and the drawings in the figures do not constitute a scale limitation.

[0036] Figure 1 Schematic diagram of a power supply system provided for an embodiment of the present application.

[0037] Description of the reference numerals in the drawings:

[0038] Power supply 100,

[0039] Hydrogen fuel cell power generation module 1, hydrogen fuel cell device 11, DC converter 12, power conversion system 13, second air compressor 14, power battery 15,

[0040] First hydrogen storage device 21, second hydrogen storage device 22, hydrogen release valve 23, hydrogen temporary storage tank 24,

[0041] Heating device 3, heat conduction furnace 31, fuel storage 32, air preheater 33, first air compressor 34, fan 35,

[0042] Heat exchange system 4, cooling tower 41, three-way valve 42,

[0043] Transformer 200, emergency power supply network 300, control cabinet 400;

[0044] Power supply system 1000. Detailed Description of the Embodiments

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0047] For ease of description, spatially relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or attitude change or change in motion state, then these directional indications will also change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will subsequently be oriented as "above other elements or features" or "over other elements or features". Thus, the exemplary term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0048] The emergency power supply system of a nuclear power plant is a key guarantee for the safe operation of the nuclear power plant. Its main function is to quickly start and provide emergency power when both the main power supply and the auxiliary power supply fail, ensuring the safe shutdown of the reactor and the normal operation of the cooling system to prevent equipment damage. In related technologies, emergency diesel generators are usually used as emergency power supplies in nuclear power plants. To solve the technical problems existing in the traditional emergency diesel generator system in the prior art, the present application provides a power supply and a power supply system that can be used as an emergency power supply for a nuclear power plant to provide emergency power supply, and can improve the reliability and environmental protection performance during power generation.

[0049] In a first aspect, Figure 1A power supply 100 provided by an embodiment of the present application includes a hydrogen fuel cell power generation module 1 and a hybrid hydrogen storage module. The hybrid hydrogen storage module includes a first hydrogen storage device 21 and a second hydrogen storage device 22. The first hydrogen storage device 21 and the second hydrogen storage device 22 store hydrogen respectively and are connected to the hydrogen fuel cell power generation module 1 respectively. The first hydrogen storage device 21 and the second hydrogen storage device 22 can supply hydrogen to the hydrogen fuel cell power generation module 1. After the hydrogen fuel cell power generation module 1 obtains hydrogen, a chemical reaction occurs, and the chemical energy is converted into electrical energy to achieve the purpose of power generation.

[0050] The reaction product of the hydrogen fuel cell power generation module 1 is water, without waste gas emission, which has an environmental protection effect. At the same time, there is no mechanical rotation part in the power generation using the hydrogen fuel cell power generation module 1, and the failure rate is low. At the same time, in the present application, the first hydrogen storage device 21 and the second hydrogen storage device 22 are provided. In an emergency, the first hydrogen storage device 21 releases hydrogen to supply electrical energy to the hydrogen fuel cell. After a period of time, the second hydrogen storage device 22 releases hydrogen to continue to supply electrical energy to the hydrogen fuel cell. In this way, the first hydrogen storage device 21 can achieve rapid response to achieve timely power supply, and the second hydrogen storage device 22 is set to continuously supply hydrogen, which can extend the power supply time. The present application overcomes the technical problems existing in the traditional emergency diesel generator system and improves the reliability and environmental protection performance.

[0051] A fuel cell is an electrochemically powered device that directly converts chemical energy into electrical energy without going through a heat engine process and is not restricted by the Carnot cycle. Therefore, the energy conversion efficiency is high and there is no pollution.

[0052] The hydrogen fuel cell power generation module 1 of the present application uses a hydrogen fuel cell for power generation. The core principle of the hydrogen fuel cell is the reverse reaction of water electrolysis. Hydrogen is oxidized at the anode (positive electrode) to generate hydrogen ions (protons) and electrons. The electrons flow through the external circuit to the cathode (negative electrode), while the hydrogen ions reach the cathode through the electrolyte membrane. At the cathode, the hydrogen ions combine with oxygen to form water and release heat energy. The potential difference generated in this process drives the external circuit, thereby generating electrical energy. Refer to Figure 1 , the hydrogen fuel cell power generation module 1 includes a second air compressor 14 to provide the required oxygen for the hydrogen fuel cell power generation module 1.

[0053] During the operation of the hydrogen fuel cell power generation module 1, the heat generated is equivalent to the electrical energy. The excessively high temperature generated by the heat will cause the performance of the fuel cell stack to decline and shorten the service life. To solve this problem, the present application further includes a heat exchange system 4. The heat exchange system 4 is connected to the hydrogen fuel cell power generation module 1 and is used to dissipate heat from the hydrogen fuel cell power generation module 1. Refer to Figure 1, in this embodiment, the heat exchange system 4 includes a cooling tower 41. The water outlet pipe of the cooling tower 41 is connected to the water inlet end of the hydrogen fuel cell power generation module 1 through a pipeline, and the water inlet end of the cooling tower 41 is connected to the water outlet end of the hydrogen fuel cell power generation module 1 through a pipeline. In this way, heat dissipation of the hydrogen fuel cell power generation module 1 is achieved through water circulation.

[0054] In this application, hydrogen is stored separately by the first hydrogen storage device 21 and the second hydrogen storage device 22. As Figure 1 shown, in the technical solution of this embodiment, both the first hydrogen storage device 21 and the second hydrogen storage device 22 adopt solid-state hydrogen storage technology; solid-state hydrogen storage technology is a technology that stores hydrogen by adsorbing or binding hydrogen with solid materials, and has advantages such as high density, high safety, and low energy consumption. Hydrogen cannot be directly converted into a solid state, but hydrogen can be stored through a solid material as an intermediate medium. There are various solid materials used to store hydrogen, usually metal and carbon-based materials. These materials need to have two characteristics, one is the hydrogenophilic characteristic, and the other is the porous characteristic or more vacancies in the molecular structure. These two characteristics help the material to "absorb hydrogen" and "release hydrogen" smoothly, thus realizing hydrogen storage and hydrogen release. The storage and release of hydrogen include two technical directions: one is physical adsorption and release, and the other is chemical adsorption and release. Physical adsorption mainly uses the high specific surface area of porous materials to adsorb hydrogen molecules on the surface. Chemical adsorption is that hydrogen combines with other elements through ionic bonds or covalent bonds to form materials such as metal hydrides. These materials usually release hydrogen under heating conditions.

[0055] In this embodiment, the temperature required for the first hydrogen storage device 21 to release hydrogen is lower than the temperature required for the second hydrogen storage device 22 to release hydrogen. In this way, when the power supply 100 of this application is started, especially in an emergency situation, the first hydrogen storage device 21 can be used in the initial stage of the emergency, and the second hydrogen storage device 22 can be used in the middle and later stages of the emergency. Among them, the first hydrogen storage device 21 can quickly reach the temperature condition for releasing hydrogen, and can quickly provide hydrogen for the hydrogen fuel cell power generation module 1 in time for the hydrogen fuel cell power generation module 1 to generate electricity to meet the power supply required for emergency loads. And the second hydrogen storage device 22 can provide hydrogen for the hydrogen fuel cell power generation module 1 after the first hydrogen storage device 21 to extend the power generation time of the hydrogen fuel cell power generation module 1.

[0056] As Figure 1 shown, in the technical solution of this embodiment, a hydrogen release valve 23 is provided on the connection pipeline between the second hydrogen storage device 22 and the hydrogen fuel cell power generation module 1. It can be understood that by controlling the opening and closing of the hydrogen release valve 23, the timing of the second hydrogen storage device 22 providing hydrogen for the hydrogen fuel cell power generation module 1 can be controlled.

[0057] To improve safety, the hydrogen release valve 23 is electrically connected to the control system of the control cabinet 400. The control system is also set to control the opening of the hydrogen release valve 23 after a preset time when the emergency power supply 100 is started, or the operator can issue an instruction to the control system according to the actual situation to control the opening timing of the hydrogen release valve 23.

[0058] In the technical solution of this embodiment, referring to Figure 1 , the first hydrogen storage device 21 uses a titanium-manganese alloy for hydrogen storage; the principle of titanium-manganese alloy hydrogen storage is based on its reversible reaction with hydrogen to form metal hydrides. Specifically, the titanium-manganese alloy can absorb a large amount of hydrogen at a certain temperature and pressure to form titanium-manganese hydride. When hydrogen needs to be released, the hydride can be decomposed by heating and pressurization to release hydrogen. The titanium-manganese alloy material supports the rapid release of high-flow hydrogen to meet emergency load requirements.

[0059] In this application, the temperature required for the first hydrogen storage device 21 to release hydrogen is not high. Thus, to achieve reasonable utilization of thermal energy, in this application, a three-way valve 42 is provided on the connecting pipeline between the water inlet end of the cooling tower 41 and the water outlet end of the hydrogen fuel cell power generation module 1. The water inlet end of the first hydrogen storage device 21 is connected to the three-way valve 42, and the water outlet end of the first hydrogen storage device 21 is connected to the water inlet end of the cooling tower 41. Thus, through the three-way valve 42, the water that absorbs the heat of the hydrogen fuel cell power generation module 1 can be introduced into the first hydrogen storage device 21 for heat exchange to provide the temperature conditions required for the first hydrogen storage device 21 to release hydrogen, and the water that has completed heat exchange then returns to the cooling tower 41. Exemplarily, when the titanium-manganese alloy releases hydrogen, it absorbs the heat of the cooling water from the three-way valve 42 of the cooling tower inlet pipeline, and the hydrogen release temperature is normal temperature, about 20 °C.

[0060] It should be noted that in some other embodiments, the heat exchange system 4 may not be connected to the first hydrogen storage device 21, but the first hydrogen storage device 21 may be connected to other heat sources.

[0061] In the technical solution of this embodiment, referring to Figure 1 , the second hydrogen storage device 22 uses magnesium-based solid-state hydrogen storage. The magnesium-based solid-state hydrogen storage technology is a technology that uses magnesium alloy as a hydrogen storage material to achieve hydrogen storage and release through physical adsorption and chemical reactions. The working principle of the magnesium-based solid-state hydrogen storage alloy is based on the chemical reaction between magnesium and hydrogen. When the magnesium alloy comes into contact with hydrogen, magnesium absorbs hydrogen and forms a stable hydride MgH2. When the stored hydrogen needs to be released, magnesium hydride can be decomposed into magnesium and hydrogen by heating or pressurization, etc. The magnesium-based hydrogen storage material has a low cost and a large hydrogen storage density, and can release hydrogen under high-temperature conditions (300 - 400 °C).

[0062] The second hydrogen storage device 22 releases hydrogen under high-temperature conditions. Thus, the hydrogen discharged from the second hydrogen storage device 22 is also at a high temperature. If the high-temperature hydrogen directly enters the hydrogen fuel cell power generation module 1, the excessive temperature will cause a decline in the performance of the fuel cell stack and shorten its service life. Therefore, to avoid the excessive temperature of the hydrogen entering the hydrogen fuel cell power generation module 1, it is necessary to cool down the hydrogen discharged from the second hydrogen storage device 22. For example, Figure 1 As shown, in the technical solution of this embodiment, it further includes a hydrogen cooler, which is connected to the hydrogen release valve 23 and is used to cool down the hydrogen passing through the hydrogen release valve 23.

[0063] In this embodiment, the water outlet pipe of the cooling tower 41 of the heat exchange system 4 is connected to the water inlet end of the hydrogen cooler, and the water inlet end of the cooling tower 41 is connected to the water outlet end of the hydrogen cooler. The cooling water provided by the cooling tower 41 is used to cool down the hydrogen passing through the hydrogen release valve 23.

[0064] In another embodiment, an independent cooling water supply device can also be set up. The hydrogen cooler is connected to the cooling water supply device, and heat dissipation and temperature reduction are achieved through circulating water.

[0065] For example Figure 1 As shown, in the technical solution of this embodiment, it further includes a hydrogen storage tank 24. The hydrogen outlet end of the hydrogen storage tank 24 is connected to the hydrogen inlet end of the hydrogen fuel cell power generation module 1; the hydrogen outlet end of the first hydrogen storage device 21 is connected to the hydrogen inlet end of the hydrogen storage tank 24; the second hydrogen storage device 22 is connected to the hydrogen inlet end of the hydrogen storage tank 24, and a hydrogen release valve 23 is provided on the connection pipeline between the second hydrogen storage device 22 and the hydrogen storage tank 24.

[0066] It can be understood that by setting up the hydrogen storage tank 24, the hydrogen entering the hydrogen fuel cell power generation module 1 can be cached, so that the hydrogen entering the hydrogen fuel cell power generation module 1 is more stable and balanced.

[0067] For example Figure 1 As shown, in the technical solution of this embodiment, it further includes a heating device 3, which is connected to the second hydrogen storage device 22; the heating device 3 is used to provide the temperature required for the second hydrogen storage device 22 to release hydrogen. Thus, the heating device 3 can provide the high temperature required for the second hydrogen storage device 22 to release hydrogen.

[0068] For example Figure 1As shown, in the technical solution of this embodiment, the heating device 3 includes a heat conduction furnace 31 and a fuel storage 32. The flue gas discharge end of the heat conduction furnace 31 is connected to the flue gas inlet end of the second hydrogen storage device 22; the discharge end of the fuel storage 32 is connected to the feed end of the heat conduction furnace 31, and the fuel storage 32 supplies fuel to the heat conduction furnace 31. The heat conduction furnace 31 burns fuel to generate heat required for the second hydrogen storage device 22 to release hydrogen.

[0069] Combustion of fuel in the heat conduction furnace 31 requires air, and a first air compressor 34 may be connected to the air inlet end of the heat conduction furnace 31.

[0070] In some embodiments, the temperature of the flue gas generated by the combustion of the heat conduction furnace 31 can reach the temperature required for the second hydrogen storage device 22 to release hydrogen, and the flue gas is discharged from the flue gas discharge end of the heat conduction furnace to the second hydrogen storage and release device. That is, after the gas enters the heat conduction furnace 31 from the air inlet end of the heat conduction furnace 31, it takes away the heat generated by the combustion of the fuel in the heat conduction furnace 31 and is discharged from the flue gas discharge end of the heat conduction furnace 31 to the second hydrogen storage device 22.

[0071] In one embodiment, the fuel storage 32 stores liquid fuel, and the heat conduction furnace 31 can adopt a liquid fuel heat conduction oil furnace. Heat is generated by burning liquid fuel (such as coal, heavy oil, light oil, combustible gas, etc.), and heat conduction oil is used as a heat carrier to transfer heat energy to the gas entering the heat conduction furnace 31. The heated high-temperature gas enters the second hydrogen storage device 22 to provide high-temperature conditions for the second hydrogen storage device 22 to release hydrogen.

[0072] In the technical solution of this embodiment, refer to Figure 1 , the water inlet end of the heat conduction furnace 31 is connected to the water outlet end of the cooling tower 41, and the water outlet end of the heat conduction furnace 31 is connected to the water inlet end of the cooling tower 41. In this way, the waste heat generated by the heat conduction furnace 31 can be taken out by the cooling water of the cooling tower 41.

[0073] It should be noted that the heat conduction furnace 31 can also be connected to an independent cooling device to achieve the purpose of taking out the waste heat generated by the heat conduction furnace 31 through the cooling water of the cooling tower 41.

[0074] Such as Figure 1 As shown, in the technical solution of this embodiment, an air preheater 33 is further included. The flue gas discharge end of the second hydrogen storage device 22 is connected to the flue gas recovery end of the air preheater 33; the exhaust end of the air preheater 33 is connected to the air inlet end of the heat conduction furnace 31;

[0075] Among them, air enters the air preheater 33 from the air inlet end of the air preheater 33, exchanges heat with the flue gas entering from the flue gas recovery end of the air preheater 33, and then is discharged from the exhaust end of the air preheater 33 to the air inlet end of the heat conduction furnace 31.

[0076] Reference Figure 1 , an air preheater 33 is provided between the air compressor and the heat conduction furnace 31. The air preheater 33 preheats the air by recovering the waste heat of the flue gas, thereby improving the thermal efficiency of the heat conduction furnace 31 and optimizing the combustion process.

[0077] To ensure the pressure balance of the air preheater 33, a vent valve is provided on the air preheater 33, which can be opened in time to discharge the air in the air preheater 33.

[0078] Such as Figure 1 shown, in the technical solution of this embodiment, the flue gas discharge end of the second hydrogen storage device 22 is connected to the air inlet end of the heat conduction furnace 31;

[0079] Among them, a part of the flue gas discharged from the flue gas discharge end of the second hydrogen storage device 22 is mixed with the air discharged from the exhaust end of the air preheater 33 and then enters the heat conduction furnace 31 from the air inlet end of the heat conduction furnace 31.

[0080] It can be understood that a part of the flue gas after heat exchange with the second hydrogen storage device 22 enters the air preheater 33 to preheat the air, and the other part returns to the heat conduction furnace 31 to form a heat conduction loop.

[0081] Reference Figure 1 , in the technical solution of this embodiment, to enable the smooth operation of the flue gas, a fan 35 is provided on the connection pipeline between the flue gas discharge end of the second hydrogen storage device 22 and the air inlet end of the heat conduction furnace 31. In this embodiment, this fan 35 is a high-temperature fan 35 and can withstand high temperatures.

[0082] Such as Figure 1 shown, in the technical solution of this embodiment, the hydrogen fuel cell power generation module 1 includes a hydrogen fuel cell device 11, a DC converter 12, and a power conversion system 13. The hydrogen inlet end of the hydrogen fuel cell device 11 is connected to the hydrogen outlet end of the hybrid hydrogen storage module; the current output end of the hydrogen fuel cell device 11 is connected to the current input end of the DC converter 12; the input end of the power conversion system 13 is connected to the voltage output end of the DC converter 12, and the power conversion system 13 outputs alternating current.

[0083] It is understandable that the hydrogen fuel cell device 11 has a hydrogen fuel cell that can convert chemical energy into electrical energy. The direct current generated by the hydrogen fuel cell device 11 is converted into a stable voltage by the DC converter 12, and then the power conversion system 13 converts the direct current into alternating current.

[0084] Reference Figure 1 , for use by downstream loads, the power conversion system 13 is connected to a transformer 200, and the transformer 200 converts the electrical energy to the required voltage. In one embodiment, the transformer 200 can boost the electrical energy to 6.6 kV or 10 kV for use by downstream loads.

[0085] Wherein, when the power supply 100 of the present application is used as an emergency power supply 100, the transformer 200 is connected to the emergency power supply network 300, and the emergency power supply network 300 is connected to downstream loads.

[0086] Reference Figure 1 , in the technical solution of this embodiment, the DC converter 12 is also connected to the power battery 15, and the power battery 15 provides the energy required for the operation of the DC converter 12.

[0087] As Figure 1 shown, in the technical solution of this embodiment, the number of the hydrogen fuel cell devices 11 is multiple, the number of the direct converters is multiple, and the hydrogen fuel cell devices 11 are connected to the DC converters 12 in one-to-one correspondence; the hydrogen inlet end of each hydrogen fuel cell device 11 is connected to the hydrogen outlet end of the hybrid hydrogen storage module, and the current output end of each DC converter 12 is connected to the input end of the power conversion system 13. In this way, the power generation and voltage of the hydrogen fuel cell power generation module 1 can be increased to meet the emergency needs of downstream loads.

[0088] In this embodiment, the number of the hydrogen fuel cell devices 11 is 5, and the power of each hydrogen fuel cell device 11 is 200 KW. In this way, 5 hydrogen fuel cell devices 11 connected in parallel can provide 1 MW of power.

[0089] As Figure 1 shown, in the technical solution of this embodiment, the hydrogen fuel cell device 11 is connected to the heat exchange system 4; wherein, the heat exchange system 4 takes away the heat generated by the hydrogen fuel cell device 11 to provide the temperature required for the release of hydrogen by the first hydrogen storage device 21.

[0090] As Figure 1As shown, in the technical solution of this embodiment, the water outlet end of the cooling tower 41 is connected to the water inlet end of the hydrogen fuel cell device 11, and the water outlet end of the hydrogen fuel cell device 11 is connected to the water inlet end of the cooling tower 41; a three-way valve 42 is provided on the connection pipeline between the cooling tower 41 and the hydrogen fuel cell device 11, the water inlet end of the first hydrogen storage device 21 is connected to the three-way valve 42, and the water outlet end of the first hydrogen storage device 21 is connected to the water inlet end of the cooling tower 41.

[0091] As Figure 1 shown, in the technical solution of this embodiment, the hydrogen fuel cell device 11 is connected to the second air compressor 14, and the second air compressor 14 provides air for the hydrogen fuel cell device 11.

[0092] Second, as Figure 1 shown, the present application further provides a power supply system 1000, which includes a plurality of power supplies 100 as described above. The specific structure of the power supply 100 refers to the above embodiments. Since the power supply system 1000 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the plurality of power supplies 100 are arranged in parallel. The plurality of power supplies 100 arranged in parallel improve the output electric energy of the power supply system 1000. Refer to Figure 1 , in this embodiment, the number of power supplies 100 is 8, the power of each power supply 100 is 1 MW, and 8 power supplies 100 can provide a power of 8 MW, which can meet the emergency needs of the nuclear power plant.

[0093] Refer to Figure 1 , the plurality of power supplies 100 are all connected to the control cabinet 400 to control the operation of each power supply 100 through the control system of the control cabinet 400.

[0094] For example, when the 500 kV main power supply 100 and the 220 kV auxiliary power supply 100 of the nuclear power plant fail, the downstream load power supply is automatically switched to the emergency power supply system. In the initial stage of the emergency (the first 1 hour): hydrogen is released from the titanium-manganese alloy hydrogen storage device for the hydrogen fuel cell to react and generate electric energy. In the middle and late stages of the emergency (after 1 hour): hydrogen is released from the magnesium-based solid hydrogen storage device for the hydrogen fuel cell to react and generate electric energy.

[0095] For the power supply 100 and the power supply system 1000 provided by the present application, the hydrogen fuel cell device 11 has no mechanical rotating parts, low failure rate, and high startup success rate; the reaction product of hydrogen is only water, without waste gas emission, meeting the requirements of green environmental protection; the operating noise of the hydrogen fuel cell device 11 is much lower than that of a diesel generator; the solid hydrogen storage device has a small volume, high hydrogen storage density, and saves space; there is no need to regularly replace diesel, and the maintenance cost is low.

[0096] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0097] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0098] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0099] In the present application, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0100] In the present application, unless otherwise clearly defined and limited, the fact that the first feature is "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the fact that the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0101] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0102] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, provided that these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

[0103] As described above, this is the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power supply (100), characterized in that: include: Hydrogen fuel cell power generation module (1); A hybrid hydrogen storage module comprises a first hydrogen storage device (21) and a second hydrogen storage device (22), wherein the first hydrogen storage device (21) and the second hydrogen storage device (22) are respectively connected to the hydrogen fuel cell power generation module (1); the first hydrogen storage device (21) and the second hydrogen storage device (22) sequentially provide hydrogen to the hydrogen fuel cell power generation module (1) to meet the needs of the hydrogen fuel cell power generation module (1) for converting electrical energy.

2. The power supply (100) according to claim 1, characterized in that, The first hydrogen storage device (21) and the second hydrogen storage device (22) both adopt solid-state hydrogen storage technology; the temperature required for the first hydrogen storage device (21) to release hydrogen is lower than the temperature required for the second hydrogen storage device (22) to release hydrogen.

3. The power supply (100) according to claim 2, characterized in that The first hydrogen storage device (21) uses titanium-manganese alloy to store hydrogen; and / or the second hydrogen storage device (22) uses magnesium-based solid-state hydrogen storage.

4. The power supply (100) according to claim 1, characterized in that, A hydrogen release valve (23) is provided on the connecting pipeline between the second hydrogen storage device (22) and the hydrogen fuel cell power generation module (1).

5. The power supply (100) according to claim 4, characterized in that, It also includes a hydrogen cooler, which is connected to the hydrogen release valve (23) and is used to cool the hydrogen passing through the hydrogen release valve (23).

6. The power supply (100) according to claim 4, wherein, It also includes a hydrogen temporary storage tank (24), the hydrogen outlet of the hydrogen temporary storage tank (24) is connected to the hydrogen inlet of the hydrogen fuel cell power generation module (1); The hydrogen outlet of the first hydrogen storage device (21) is connected to the hydrogen inlet of the hydrogen temporary storage tank (24); the second hydrogen storage device (22) is connected to the hydrogen inlet of the hydrogen temporary storage tank (24), and the hydrogen discharge valve (23) is provided on the connecting pipeline between the second hydrogen storage device (22) and the hydrogen temporary storage tank (24).

7. The power supply (100) according to claim 1, characterized in that, It also includes a heat supply device (3), which is connected to the second hydrogen storage device (22); the heat supply device (3) is used to provide the second hydrogen storage device (22) with the temperature required for releasing hydrogen.

8. The power supply (100) according to claim 7, wherein, The heating device (3) comprises: a heat conduction furnace (31), wherein a flue gas discharge end of the heat conduction furnace (31) is connected to a flue gas inlet end of the second hydrogen storage device (22); A fuel storage (32), wherein the discharge end of the fuel storage (32) is connected to the feed end of the heat-conducting furnace (31), and the fuel storage (32) provides fuel for the heat-conducting furnace (31).

9. The power supply (100) according to claim 8, wherein It also includes an air preheater (33), the smoke exhaust end of the second hydrogen storage device (22) is connected to the smoke recovery end of the air preheater (33); the exhaust end of the air preheater (33) is connected to the air inlet end of the heat conduction furnace (31); The air enters the air preheater (33) from the air inlet end of the air preheater (33), exchanges heat with the flue gas entering from the flue gas recovery end of the air preheater (33), and is then discharged from the exhaust end of the air preheater (33) to the air inlet end of the heat conduction furnace (31).

10. The power supply (100) according to claim 9, characterized in that, The flue gas discharge end of the second hydrogen storage device (22) is connected to the air inlet end of the heat conduction furnace (31); Among them, a part of the flue gas discharged from the flue gas discharge end of the second hydrogen storage device (22) is mixed with the air discharged from the exhaust end of the air preheater (33), and then enters the heat conduction furnace (31) from the intake end of the heat conduction furnace (31).

11. The power supply (100) according to any one of claims 1 to 10, characterized in that The hydrogen fuel cell power generation module (1) includes: A hydrogen fuel cell device (11), the hydrogen intake end of the hydrogen fuel cell device (11) is connected to the hydrogen output end of the hybrid hydrogen storage module; A DC converter (12), the current output end of the hydrogen fuel cell device (11) is connected to the current input end of the DC converter (12); A power conversion system (13), the input end of the power conversion system (13) is connected to the voltage output end of the DC converter (12), and the power conversion system (13) outputs alternating current.

12. The power supply (100) according to claim 11, wherein, The number of the hydrogen fuel cell devices (11) is multiple, the number of the DC converters (12) is multiple, and the hydrogen fuel cell devices (11) are connected to the DC converters (12) in one-to-one correspondence; the hydrogen intake end of each hydrogen fuel cell device (11) is connected to the hydrogen output end of the hybrid hydrogen storage module, and the current output end of each DC converter (12) is connected to the input end of the power conversion system (13).

13. The power supply (100) according to claim 11, wherein, It further includes a heat exchange system (4), the hydrogen fuel cell device (11) and the first hydrogen storage device (21) are both connected to the heat exchange system (4); Among them, the heat exchange system (4) takes away the heat generated by the hydrogen fuel cell device (11) to provide the temperature required for the first hydrogen storage device (21) to release hydrogen.

14. The power supply (100) according to claim 13, characterized in that The heat exchange system (4) includes a cooling tower (41) and a three-way valve (42), the water outlet end of the cooling tower (41) is connected to the water inlet end of the hydrogen fuel cell device (11), and the water outlet end of the hydrogen fuel cell device (11) is connected to the water inlet end of the cooling tower (41); A three-way valve (42) is provided on the connection pipeline between the cooling tower (41) and the hydrogen fuel cell device (11), the water inlet end of the first hydrogen storage device (21) is connected to the three-way valve (42), and the water outlet end of the first hydrogen storage device (21) is connected to the water inlet end of the cooling tower (41).

15. A power supply system (1000), characterized in that, It includes a plurality of power supplies (100) as described in any one of claims 1 to 14, and the plurality of power supplies (100) are arranged in parallel.

Images