Fused salt energy storage coupling pumped storage peak regulation energy system based on nuclear energy

Abstract

The invention belongs to the technical field of new energy power generation, and particularly relates to a nuclear energy-based fused salt energy storage coupled pumped storage peak regulation energy system. An outlet of the groove type heat collector is connected with an inlet of the electric heater, an outlet of the electric heater is connected with an inlet of the high-temperature molten salt storage tank, an outlet of the high-temperature molten salt storage tank is connected with an inlet of the molten salt pump A, an outlet of the molten salt pump A is connected with an inlet of the steam generator, and an inlet of the low-temperature molten salt storage tank is connected with an outlet of the steam generator. An outlet of the low-temperature molten salt storage tank is connected with an inlet of the molten salt pump B, an outlet of the molten salt pump B is connected with an inlet of the groove type heat collector, an outlet of the reactor is connected with an inlet of the steam generator, and an outlet of the steam generator is connected with an inlet of the steam turbine and an inlet of the high-temperature industrial steam pipeline. The technical problem that in the prior art, the peak regulation flexibility of an energy system is insufficient is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of renewable energy power generation, and in particular relates to a nuclear energy-based molten salt energy storage coupled with pumped storage peak-shaving energy system. Background Art

[0002] Against the backdrop of global energy structure transformation and climate change response, it is imperative to efficiently utilize renewable energy and reduce carbon emissions. As an important renewable energy source, solar energy, despite its huge potential, is limited in its role in energy supply due to its intermittent and unstable nature. To this end, molten salt energy storage technology has emerged. Using molten salt as a heat storage medium, it can store the heat energy generated by solar energy at high temperatures and release it effectively when needed. Combined with pumped storage technology, it can further improve the stability of the power grid and optimize the integration of intermittent renewable energy. At the same time, the combination of nuclear power generation not only improves the efficiency and flexibility of the overall energy system, but also provides a new solution for the low-carbon production of high-temperature steam for industrial use. The development of this integrated energy system can not only effectively integrate renewable energy such as solar energy and reduce dependence on fossil fuels, but also significantly reduce carbon emissions in industrial production, which is of great significance to promoting the optimization of energy structure and climate change response. Summary of the invention

[0003] The purpose of the present invention is to provide a molten salt energy storage coupled with pumped storage peak-shaving energy system based on nuclear energy, so as to solve the technical problem of insufficient peak-shaving flexibility of energy systems in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A molten salt energy storage coupled pumped storage peak-shaving energy system based on nuclear energy, wherein the outlet of a trough collector is connected to the inlet of an electric heater, the outlet of the electric heater is connected to the inlet of a high-temperature molten salt storage tank, the outlet of the high-temperature molten salt storage tank is connected to the inlet of a molten salt pump A, the outlet of the molten salt pump A is connected to the inlet of a steam generator, the inlet of a low-temperature molten salt storage tank is connected to the outlet of the steam generator, the outlet of the low-temperature molten salt storage tank is connected to the inlet of a molten salt pump B, the outlet of the molten salt pump B is connected to the inlet of the trough collector, the outlet of the reactor is connected to the inlet of the steam generator, the outlet of the steam generator is connected to the inlet of a steam turbine and the inlet of a high-temperature industrial steam pipeline, the outlet of the steam turbine is connected to the inlet of a generator A, two ends of the motor are respectively connected to a power supply line and a water pump, the inlet of the water pump is connected to a lower reservoir, and the outlet of the water pump is connected to the inlet of an upper reservoir; the outlet of the upper reservoir is connected to the inlet of a turbine, the outlet of the turbine is connected to the lower reservoir, and the turbine is connected to generator B.

[0006] The outlet of the steam turbine is connected to the inlet of generator A through a bearing.

[0007] The outlet of the generator A delivers electricity to electricity users.

[0008] The turbine is connected to the generator B through bearings.

[0009] The outlet of generator B is connected to the power supply line.

[0010] During periods of sufficient sunlight, the trough collector uses a series of concave mirrors to aim at the sun, concentrating the heat energy of sunlight to heat the flowing molten salt and increase its temperature, heating the molten salt to a high temperature state, providing high-quality thermal energy for subsequent energy storage and conversion processes; when sunlight is insufficient or the nuclear power plant needs to reduce its load, the excess electricity generated by pumped storage or the reactor is connected to the electric heater through the power supply line to supplement the heating of the molten salt, and the heated high-temperature molten salt is stored in the high-temperature molten salt storage tank.

[0011] During the peak period of energy demand, the high-temperature molten salt in the high-temperature molten salt storage tank is transported to the steam generator through the molten salt pump A for heat exchange with water to generate high-pressure steam, which is used to drive the steam turbine and generate electricity through the generator A. The used molten salt is cooled and transported to the low-temperature molten salt storage tank through the molten salt pump B to be recycled again.

[0012] The heat energy generated by the reactor is used to heat the water in the steam generator, generating high-temperature and high-pressure steam to drive the steam turbine, which in turn generates electricity through generator A. At the same time, part of the steam is also extracted to supply chemical companies.

[0013] The driving steam turbine is mechanically connected to generator A.

[0014] When electricity demand is low, the electric motor drives the water pump to pump water from the lower reservoir to the upper reservoir. In the process, electrical energy is converted into water potential energy. When electricity demand is peak, the water stored in the upper reservoir is released to the lower reservoir through the turbine. The mechanical connection between the turbine and generator B converts the water potential energy into electrical energy and outputs it to the power supply line.

[0015] The beneficial effects achieved by the present invention are:

[0016] The nuclear-based molten salt energy storage coupled pumped storage peak-shaving energy system provided by the present invention not only has a significant effect in improving power supply efficiency and stability, but also has important significance in providing steam for chemical companies, which is specifically reflected in the following aspects:

[0017] Improved system operation stability: The system design enables molten salt energy storage to operate under stable conditions, ensuring the continuous operation and stability of the entire energy system. In particular, when solar radiation is insufficient or nuclear power load is reduced, additional heating is provided by electric heaters to ensure efficient operation of the molten salt energy storage system.

[0018] Dual functions of peak load regulation and steam supply: Through the effective combination of pumped storage system and nuclear power generation steam supply system, the system can quickly respond to load changes of the power grid and realize flexible peak load regulation. When the power grid is under low load, energy is stored in the form of water potential energy and released quickly when the load is high, which improves the overall regulation capacity of the power grid. At the same time, the high-temperature steam of the nuclear power generation steam supply system can be used to provide the necessary energy needs for industrial users such as chemical companies.

[0019] Long-term operational reliability: The operation of the system will not negatively affect the life of nuclear power generating units and auxiliary equipment. The reactor and steam turbine units operate at optimal load, avoiding frequent load fluctuations, thus extending the service life of the equipment.

[0020] Improved technical maturity: As a heat storage medium, molten salt has excellent thermophysical properties, such as high heat capacity and low vapor pressure, making the application of molten salt energy storage systems increasingly mature. The operating experience of the system is constantly accumulating, improving the overall system reliability and efficiency.

[0021] Therefore, the present invention not only effectively improves the regulation capacity and efficiency of the energy system by comprehensively utilizing nuclear energy, molten salt energy storage and pumped storage technology, ensuring the stable power supply and flexible peak load regulation of the power grid, but also can provide necessary high-temperature steam for chemical companies and other industrial users while supplying power. This multifunctional energy system not only ensures the stability of power supply, but also greatly enhances the comprehensive utilization efficiency of energy and reduces the impact on the environment. The application of this technology is of great strategic significance for promoting the use of clean energy, supporting industrial energy demand, and maintaining the stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of the nuclear-based molten salt energy storage coupled with pumped storage peak-shaving energy system;

[0023] In the figure: ①: trough collector; ②: electric heater; ③: high-temperature molten salt storage tank; ④: molten salt pump A; ⑤: steam generator; ⑥: steam turbine; ⑦: generator A; ⑧: reactor; ⑨: molten salt pump B; ⑩: low-temperature molten salt storage tank; Upper Reservoir; Water pump; Electric motor; Water turbine; Generator B; Lower reservoir. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The peak-shaving energy system includes a molten salt energy storage system, a pumped storage system and a nuclear power generation steam supply system.

[0026] In the molten salt energy storage system, the trough collector adopts high-efficiency photothermal conversion technology and is specially designed to maximize the absorption of solar radiation energy. The outlet of the collector is connected to an electric heater, which is equipped with a high-power density heating element to ensure that the molten salt can obtain sufficient heat supplement when solar radiation is insufficient. The outlet of the electric heater is directly connected to the high-temperature molten salt storage tank; in the energy output stage, the molten salt pump serves as a fluid conveying device to transport the high-temperature molten salt from the storage tank to the steam generator. In this process, the molten salt maintains its thermodynamic stability while transferring heat to ensure the efficiency and safety of energy conversion. The steam generator is designed to efficiently convert the thermal energy of the molten salt into steam energy.

[0027] A nuclear-based molten salt energy storage coupled pumped storage peak-shaving energy system is carried out in the following steps:

[0028] In the heat storage part of the molten salt energy storage system, the trough collector uses a series of concave reflectors to maximize the focus and absorption of thermal energy from solar radiation. These collectors concentrate the thermal energy of sunlight onto the flowing molten salt, effectively heating it to a high temperature state. When there is insufficient sunlight or the nuclear power plant needs to reduce the load, the system is connected to the power supply line through an electric heater, and the molten salt is supplemented with heating using excess electricity generated by pumped storage or the reactor to ensure a continuous supply of energy. The heated molten salt is stored in a high-temperature molten salt storage tank, ready for energy output.

[0029] In the heat release phase of the molten salt energy storage system, the high-temperature molten salt is pumped out of the storage tank by the molten salt pump 1 and transported to the steam generator, where it exchanges heat with water to generate high-pressure steam. This steam is used to drive the steam turbine and generate electricity through the generator 1 mechanically connected to it. After cooling, the used molten salt is transported to the low-temperature molten salt storage tank by the molten salt pump 2 for reuse.

[0030] In the nuclear power generation steam supply system, the outlet of the nuclear reactor is directly connected to the inlet of the steam generator, ensuring that the heat energy generated by the nuclear reactor can be effectively transferred and converted into steam. The outlet of the steam generator is then connected to the inlet of the steam turbine and the inlet of the high-temperature industrial steam pipeline. In addition, the outlet of the steam turbine is connected to the inlet of the generator through a high-efficiency bearing, thereby converting mechanical energy into electrical energy, and transmitting the electrical energy to the power supply line through the outlet of the generator 1.

[0031] In the pumped storage system, the electric motor is specially designed to drive the water pump to maximize the conversion of electrical energy into water potential energy. The water pump has an efficient fluid transport capacity, pumping water from the lower reservoir to the upper reservoir, effectively storing potential energy. During periods of high load on the power grid, the outlet of the upper reservoir is connected to the inlet of the turbine, and the gravity potential energy of the water is used to drive the turbine, thereby converting the potential energy into mechanical energy. The turbine is connected to the generator 2 through bearings, which efficiently converts mechanical energy into electrical energy to supply power to the power grid. In this process, the pumped storage system not only ensures the effective storage and rapid release of energy, but also improves the flexibility of response to changes in power grid load.

[0032] Among them, in the molten salt energy storage system, the trough collector adopts high-efficiency photothermal conversion technology and is specially designed to maximize the absorption of solar radiation energy. The outlet of the collector is connected to an electric heater, which is equipped with a high-power density heating element to ensure that the molten salt can obtain sufficient heat supplement when solar radiation is insufficient. The outlet of the electric heater is directly connected to the high-temperature molten salt storage tank; in the energy output stage, the molten salt pump serves as a fluid conveying device to transport the high-temperature molten salt from the storage tank to the steam generator. In this process, the molten salt maintains its thermodynamic stability while transferring heat to ensure the efficiency and safety of energy conversion. The steam generator is designed to efficiently convert the thermal energy of the molten salt into steam energy.

[0033] In the pumped storage system, when the power demand is low, the motor drives the water pump to transport water from the lower reservoir to the upper reservoir, converting the electrical energy into the potential energy of water for storage. During the period of high power demand, the water stored in the upper reservoir is released to the lower reservoir through the turbine, and the turbine converts the potential energy of water into electrical energy through its mechanical connection with the generator 2 and transmits it to the power grid.

[0034] In the nuclear power generation steam supply system, the high-temperature heat energy generated by the reactor is used to heat the water in the steam generator to produce high-temperature and high-pressure steam. This steam can not only be used to drive the steam turbine to generate electricity, but can also be partially extracted for industrial use such as chemical companies.

[0035] A nuclear-based molten salt energy storage coupled pumped storage peak-shaving energy system, comprising a molten salt energy storage system, a pumped storage system and a nuclear power generation steam supply system, wherein the molten salt energy storage system and the nuclear power generation steam supply system are provided with a steam generator 5, the molten salt energy storage system comprises a high-temperature molten salt storage tank 3, an electric heater 2, a trough collector 1, a molten salt pump A4, a molten salt pump B9 and a low-temperature molten salt storage tank 10; the pumped storage system comprises an upper reservoir 11, a lower reservoir 16, a water pump 12, an electric motor 13, a turbine 14 and a generator B15; the nuclear power generation steam supply system comprises a reactor 8, a steam generator 5, a steam turbine 6 and a generator A7.

[0036] The heat storage system of the molten salt energy storage system, the outlet of the trough collector 1 is connected to the inlet of the electric heater 2, the outlet of the electric heater 2 is connected to the inlet of the high-temperature molten salt storage tank 3, the outlet of the high-temperature molten salt storage tank 3 is connected to the inlet of the molten salt pump A4, and the outlet of the molten salt pump A4 is connected to the inlet of the steam generator 5.

[0037] The heat release system of the molten salt energy storage system, the inlet of the low-temperature molten salt storage tank 10 is connected to the outlet of the steam generator 5, the outlet of the low-temperature molten salt storage tank 10 is connected to the inlet of the molten salt pump B9, and the outlet of the molten salt pump B9 is connected to the inlet of the trough collector 1.

[0038] In the nuclear power generation steam supply system, the outlet of the reactor 8 is connected to the inlet of the steam generator 5, the outlet of the steam generator 5 is connected to the inlet of the steam turbine 6 and the inlet of the high-temperature industrial steam pipeline, the outlet of the steam turbine 6 is connected to the inlet of the generator A7 through a bearing, and the outlet of the generator A7 transmits electricity to electricity users.

[0039] In the pumped storage system, the two ends of the motor 13 are respectively connected to the power supply line and the water pump 12, the inlet of the water pump 12 is connected to the lower reservoir 16, and the outlet of the water pump 12 is connected to the inlet of the upper reservoir 11; the outlet of the upper reservoir 11 is connected to the inlet of the turbine 14, and the outlet of the turbine 14 is connected to the lower reservoir 16. The turbine 14 is connected to the generator B15 through a bearing, and the outlet of the generator B15 is connected to the power supply line.

[0040] The heat storage system of the molten salt energy storage system uses a series of concave mirrors to face the sun during the period of sufficient sunlight exposure, and the trough collector 1 concentrates the heat energy of the sunlight to heat the flowing molten salt, increase its temperature, and heat the molten salt to a high temperature state, providing high-quality thermal energy for subsequent energy storage and conversion processes. At the same time, when the light is insufficient or the nuclear power plant needs to reduce the load, the excess electricity generated by the pumped storage or reactor is connected to the electric heater 2 through the power supply line to supplement the heating of the molten salt. The heated high-temperature molten salt is stored in the high-temperature molten salt storage tank 3.

[0041] In the heat release system of the molten salt energy storage system, during the peak period of energy demand, the high-temperature molten salt in the high-temperature molten salt storage tank 3 is transported to the steam generator 5 through the molten salt pump A4, and heat exchanged with water to generate high-pressure steam. The generated steam can be used to drive the steam turbine 6 and generate electricity through the generator A7. The used molten salt is cooled and transported to the low-temperature molten salt storage tank 10 through the molten salt pump B9 to be recycled again.

[0042] In the nuclear power generation steam supply system, the heat energy generated by the reactor 8 is used to heat the water in the steam generator 5 to generate high-temperature and high-pressure steam. This steam can be used to drive the steam turbine 6, and then generate electricity through the generator A7 mechanically connected to it. At the same time, part of the steam can also be extracted to supply chemical companies.

[0043] In the pumped storage system, when the electricity demand is low, the motor 13 drives the water pump 12 to pump water from the lower reservoir 16 to the upper reservoir 11. In this process, the electrical energy is converted into the potential energy of the water. When the electricity demand is at a peak, the water stored in the upper reservoir 11 is released to the lower reservoir 16 through the turbine 14. The mechanical connection between the turbine 14 and the generator B15 converts the potential energy of the water into electrical energy, which is output to the power supply line.

[0044] A nuclear-based molten salt energy storage coupled with pumped storage peak-shaving energy system, such as Figure 1 As shown, the system includes a nuclear power generation steam supply system, a molten salt energy storage system and a pumped storage system.

[0045] Among them, a molten salt electric heater 1 is provided between the nuclear power generation steam supply system and the molten salt energy storage system. The nuclear power generation steam supply system includes a reactor 8 and a steam turbine generator set 6. The molten salt electric heater 1 is connected to the steam turbine generator set 6 and is used to store the electricity generated by the nuclear power generator set in the form of heat in the molten salt.

[0046] The molten salt energy storage system includes a molten salt heat release system and a molten salt heat storage system. The molten salt of the molten salt heat release system enters the molten salt heat storage system after being heated by the molten salt electric heater 1. The molten salt of the molten salt heat storage system returns to the molten salt heat release system after releasing heat through the steam generator 7. Specifically, the molten salt heat release system includes a low-temperature molten salt storage tank 10, the outlet of the low-temperature molten salt storage tank 10 is connected to the molten salt electric heater 1 through a molten salt pump 2, and the molten salt heat storage system includes a high-temperature molten salt storage tank 3, the outlet of the high-temperature molten salt storage tank 3 is connected to the steam generator 7 through a molten salt pump 1, and the two ends of the steam generator 7 are respectively connected to the outlet of the high-temperature molten salt storage tank 3 and the inlet of the low-temperature molten salt storage tank 10.

[0047] Among them, in the molten salt heat absorption stage: the molten salt electric heater 1 is used to store part of the electricity generated by the nuclear power generator set 6 in the molten salt in the form of heat. The cold molten salt in the low-temperature molten salt storage tank 10 is pressurized by the molten salt pump 2 and connected to the molten salt electric heater 1, and enters the high-temperature molten salt storage tank 3 after electrical heating, where the heat is stored.

[0048] In the heat release stage of the molten salt, the steam generator 7 is used to heat the feed water into steam that meets the requirements of the steam turbine using the high-temperature molten salt. The hot molten salt in the high-temperature molten salt storage tank 3 is pressurized by the molten salt pump 1 and connected to the steam generator 7, and returns to the low-temperature molten salt storage tank 10 after heat release.

[0049] Among them, the core of the molten salt energy storage system is to use molten salt as the energy storage medium. Molten salt is mainly used in its molten state in the heat storage system, and its temperature range depends on the inherent characteristics of the molten salt. The freezing point temperature of molten salts of different components varies. Generally, the freezing point of molten salt is around 180-250°C, and the maximum operating temperature can reach around 500-600°C. This enables the molten salt energy storage system to store a large amount of thermal energy at high temperatures, providing the necessary regulation capabilities for the power grid.

[0050] The nuclear power generation steam supply system includes a reactor 8 and a steam turbine generator set 6, and a molten salt electric heater 1 connected thereto. The high-temperature heat energy generated by the reactor 8 is used to heat the water in the steam generator 7 to generate high-temperature and high-pressure steam. This steam is mainly used to drive the steam turbine set 6 to generate electricity. At the same time, the system can extract part of the high-temperature steam to supply chemical enterprises and other industrial uses, realizing the dual functions of power supply and steam supply.

[0051] The pumped storage system includes an upper reservoir 11 and a lower reservoir 16, as well as a water pump 12 and a motor 13 connecting the two reservoirs. During low load of the power grid, the motor 13 drives the water pump 12 to pump water from the lower reservoir 16 to the upper reservoir 11, converting electrical energy into water potential energy and storing it. When the power grid is highly loaded, the water stored in the upper reservoir 11 is released to the lower reservoir 16 through the turbine 14, and the turbine 14 is mechanically connected to the generator 2 to convert the water potential energy into electrical energy and transmit it to the power grid.

[0052] The present invention discloses a nuclear-based molten salt energy storage coupled pumped storage peak-shaving energy system, which effectively integrates nuclear power generation steam supply, molten salt energy storage and pumped storage technology to cope with the fluctuation and regulation needs of the power grid load. When the power grid dispatching load drops to, for example, 40% Pr, if it is lower than the minimum stable operating load of nuclear power generation (such as 50% Pr), the reactor 8 and steam turbine generator set 6 in the system still operate above the minimum stable load (such as 50% Pr) to avoid further reduction of the load. At this time, the system uses the extra electricity (Δ=10% Pr) generated by the steam turbine generator set 6 to heat the molten salt through the molten salt electric heater 1, and converts the electrical energy into thermal energy storage in the molten salt.

[0053] A molten salt energy storage coupled pumped storage peak-shaving energy system based on nuclear energy, wherein the outlet of the trough collector 1 is connected to the inlet of the electric heater 2, the outlet of the electric heater 2 is connected to the inlet of the high-temperature molten salt storage tank 3, the outlet of the high-temperature molten salt storage tank 3 is connected to the inlet of the molten salt pump A4, the outlet of the molten salt pump A4 is connected to the inlet of the steam generator 5, the inlet of the low-temperature molten salt storage tank 10 is connected to the outlet of the steam generator 5, the outlet of the low-temperature molten salt storage tank 10 is connected to the inlet of the molten salt pump B9, the outlet of the molten salt pump B9 is connected to the inlet of the trough collector 1 The outlet of the reactor 8 is connected to the inlet of the steam generator 5, the outlet of the steam generator 5 is connected to the inlet of the steam turbine 6 and the inlet of the high-temperature industrial steam pipeline, the outlet of the steam turbine 6 is connected to the inlet of the generator A7, the two ends of the motor 13 are respectively connected to the power supply line and the water pump 12, the inlet of the water pump 12 is connected to the lower reservoir 16, and the outlet of the water pump 12 is connected to the inlet of the upper reservoir 11; the outlet of the upper reservoir 11 is connected to the inlet of the turbine 14, the outlet of the turbine 14 is connected to the lower reservoir 16, and the turbine 14 is connected to the generator B15.

[0054] The outlet of the steam turbine 6 is connected to the inlet of the generator A7 through a bearing.

[0055] The outlet of the generator A7 transmits electricity to electricity users.

[0056] The turbine 14 is connected to the generator B15 via bearings.

[0057] The outlet of the generator B15 is connected to the power supply line.

[0058] During periods of sufficient sunlight, the trough collector 1 uses a series of concave mirrors to face the sun, concentrate the heat energy of the sunlight to heat the flowing molten salt to increase its temperature, and heat the molten salt to a high temperature state, providing high-quality thermal energy for subsequent energy storage and conversion processes; when the sunlight is insufficient or the nuclear power plant needs to reduce its load, the excess electricity generated by the pumped storage or reactor is connected to the electric heater 2 through the power supply line to supplement the heating of the molten salt, and the heated high-temperature molten salt is stored in the high-temperature molten salt storage tank 3.

[0059] During the peak period of energy demand, the high-temperature molten salt in the high-temperature molten salt storage tank 3 is transported to the steam generator 5 through the molten salt pump A4 to exchange heat with water to generate high-pressure steam, which is used to drive the steam turbine 6 and generate electricity through the generator A7. The used molten salt is cooled and transported to the low-temperature molten salt storage tank 10 through the molten salt pump B9 to be recycled again.

[0060] The heat energy generated by the reactor 8 is used to heat the water in the steam generator 5, generating high-temperature and high-pressure steam to drive the steam turbine 6, and then generating electricity through the generator A7. At the same time, part of the steam is also extracted to supply chemical companies.

[0061] The driving steam turbine 6 is mechanically connected to the generator A7.

[0062] When the electricity demand is low, the motor 13 drives the water pump 12 to pump water from the lower reservoir 16 to the upper reservoir 11. In the process, the electrical energy is converted into the potential energy of the water. When the electricity demand is peak, the water stored in the upper reservoir 11 is released to the lower reservoir 16 through the turbine 14. The mechanical connection between the turbine 14 and the generator B15 converts the potential energy of the water into electrical energy, which is output to the power supply line.

Claims

1. A nuclear-based molten salt energy storage coupled pumped storage peak-shaving energy system, characterized by: The outlet of the trough collector is connected to the inlet of the electric heater, the outlet of the electric heater is connected to the inlet of the high-temperature molten salt storage tank, the outlet of the high-temperature molten salt storage tank is connected to the inlet of molten salt pump A, the outlet of molten salt pump A is connected to the inlet of the steam generator, the inlet of the low-temperature molten salt storage tank is connected to the outlet of the steam generator, the outlet of the low-temperature molten salt storage tank is connected to the inlet of molten salt pump B, the outlet of molten salt pump B is connected to the inlet of the trough collector, the outlet of the reactor is connected to the inlet of the steam generator, the outlet of the steam generator is connected to the inlet of the steam turbine and the inlet of the high-temperature industrial steam pipeline, the outlet of the steam turbine is connected to the inlet of the generator A, the two ends of the motor are connected to the power supply line and the water pump respectively, the inlet of the water pump is connected to the lower reservoir, and the outlet of the water pump is connected to the inlet of the upper reservoir; the outlet of the upper reservoir is connected to the inlet of the turbine, the outlet of the turbine is connected to the lower reservoir, and the turbine is connected to the generator B.

2. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: The outlet of the steam turbine is connected to the inlet of generator A through a bearing.

3. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: The outlet of the generator A delivers electricity to electricity users.

4. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: The turbine is connected to the generator B through bearings.

5. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: The outlet of generator B is connected to the power supply line.

6. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: During periods of sufficient sunlight, the trough collector uses a series of concave mirrors to aim at the sun, concentrating the heat energy of the sun's rays to heat the flowing molten salt and raise its temperature, heating the molten salt to a high temperature state, providing high-quality thermal energy for subsequent energy storage and conversion processes; When sunlight is insufficient or the nuclear power plant needs to reduce its load, excess electricity generated by pumped storage or reactors is connected to the electric heater through power supply lines to supplement heating of the molten salt. The heated high-temperature molten salt is stored in a high-temperature molten salt storage tank.

7. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: During the peak period of energy demand, the high-temperature molten salt in the high-temperature molten salt storage tank is transported to the steam generator through the molten salt pump A for heat exchange with water to generate high-pressure steam, which is used to drive the steam turbine and generate electricity through the generator A. The used molten salt is cooled and transported to the low-temperature molten salt storage tank through the molten salt pump B to be recycled again.

8. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: The heat energy generated by the reactor is used to heat the water in the steam generator, generating high-temperature and high-pressure steam to drive the steam turbine, which in turn generates electricity through generator A. At the same time, part of the steam is also extracted to supply chemical companies.

9. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 8 is characterized in that: The driving steam turbine is mechanically connected to generator A.

10. The nuclear energy-based molten salt energy storage coupled pumped storage peak-shaving energy system according to claim 1 is characterized in that: When electricity demand is low, the electric motor drives the water pump to pump water from the lower reservoir to the upper reservoir. In the process, electrical energy is converted into water potential energy. When electricity demand is peak, the water stored in the upper reservoir is released to the lower reservoir through the turbine. The mechanical connection between the turbine and generator B converts the water potential energy into electrical energy and outputs it to the power supply line.

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