Energy storage system and new energy power station combining fused salt and fluidized quartz sand

Abstract

The utility model provides a kind of energy storage system and new energy power station of fused salt combined fluidized quartz sand, including heat absorption circulating assembly, heat release circulating assembly and heat exchange energy storage assembly, low temperature fused salt in the heat absorption fused salt tank circulates in the heat absorption fused salt circulating pipeline, it is heated into high temperature fused salt after being heated by fused salt heating unit, again after heat exchange with quartz sand particle by heat exchange energy storage box, become low temperature fused salt and flow back into heat absorption fused salt tank;Low temperature fused salt in the heat release fused salt tank flows in the heat release fused salt circulating pipeline, after heat exchange with quartz sand particle by heat exchange energy storage box, become high temperature fused salt, again realize heat release by steam generation unit, low temperature fused salt after heat release flows back into the heat release fused salt tank.Compared with prior art, in the present scheme, fused salt only serves as heat exchange medium, and the amount required is only about 10% of the existing system, the heat storage medium uses quartz sand particle, greatly reducing the investment cost of fused salt heat storage system.

Description

Technical Field

[0001] This utility model relates to the field of molten salt energy storage technology, and in particular to an energy storage system and a new energy power system using molten salt combined with fluidized quartz sand. Background Technology

[0002] New energy power plants refer to facilities that generate electricity using renewable energy sources such as solar, wind, and biomass energy. They are characterized by being environmentally friendly, renewable, and having low carbon emissions. However, new energy power plants are affected by factors such as sunlight, climate, season, and location, resulting in poor continuity and stability in energy utilization. Therefore, new energy power plants are usually equipped with molten salt thermal energy storage systems to store and release the absorbed energy through molten salt, thereby achieving sustainable power supply.

[0003] Molten salt thermal energy storage is an energy storage technology that uses molten salt to store and release heat energy. It plays an important role in building a new type of power system based on new energy sources and ensuring the safe and stable operation of the power system. Molten salt thermal energy storage systems have advantages such as high energy storage density and long service life, and are widely used in fields such as solar thermal power generation, flexible retrofitting of thermal power plants, and industrial waste heat recovery.

[0004] However, molten salt is expensive. Taking the most commonly used binary molten salt (60% NaNO3 + 40% KNO3) as an example, the price is around 6,000 yuan per ton. For instance, a molten salt energy storage system with a thermal storage capacity of 3000 MWh requires 30,000 tons of binary molten salt. Furthermore, a molten salt energy storage system with a thermal storage capacity of 3000 MWh also requires a high- and low-temperature molten salt tank capable of holding 30,000 tons of salt. In new energy power plants, the large amount of molten salt required for molten salt thermal storage systems, along with the high cost of supporting equipment such as molten salt tanks and long-shaft high-temperature molten salt pumps, results in a high investment cost for molten salt thermal storage systems in new energy power plants. Summary of the Invention

[0005] This invention provides an energy storage system combining molten salt and fluidized quartz sand to solve the technical problem of high investment cost of molten salt thermal storage systems in current new energy power plants.

[0006] This utility model provides an energy storage system for molten salt-bonded fluidized stone quartz sand, comprising:

[0007] A heat-absorbing circulation assembly includes a molten salt heating unit and a heat-absorbing molten salt tank, as well as a heat-absorbing molten salt tank, a molten salt heating unit and a heat-absorbing molten salt circulation pipe connected to the heat-absorbing molten salt tank. The heat-absorbing molten salt tank contains low-temperature molten salt, which circulates within the heat-absorbing molten salt tank and the heat-absorbing molten salt circulation pipe. The molten salt heating unit is disposed on the heat-absorbing molten salt circulation pipe.

[0008] The exothermic circulation assembly includes a steam generating unit and an exothermic molten salt tank, as well as an exothermic molten salt circulation pipe connected to the absorbent molten salt tank. The exothermic molten salt tank contains low-temperature molten salt, which circulates within the exothermic molten salt tank and the exothermic molten salt circulation pipe. The steam generating unit is located on the exothermic molten salt circulation pipe.

[0009] A heat exchange and energy storage component, the heat exchange and energy storage component including a heat exchange and energy storage box, the heat exchange and energy storage box being filled with quartz sand particles, and the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe both passing through the heat exchange and energy storage box;

[0010] In the heat-absorbing molten salt tank, the low-temperature molten salt circulates in the heat-absorbing molten salt circulation pipe, is heated into high-temperature molten salt by the molten salt heating unit, and then exchanges heat with the quartz sand particles in the heat exchange storage box before becoming low-temperature molten salt and flowing back into the heat-absorbing molten salt tank. In the heat-releasing molten salt tank, the low-temperature molten salt flows in the heat-releasing molten salt circulation pipe, exchanges heat with the quartz sand particles in the heat exchange storage box before becoming high-temperature molten salt, and then releases heat through the steam generation unit. The released low-temperature molten salt then flows back into the heat-releasing molten salt tank.

[0011] In one embodiment of the present invention, an endothermic molten salt circulation pump is provided on the endothermic molten salt circulation pipeline at the outlet of the endothermic molten salt tank, and an exothermic molten salt circulation pump is provided on the exothermic molten salt circulation pipeline at the outlet of the exothermic molten salt tank.

[0012] In one embodiment of this utility model, the molten salt heating unit is a heater connected to a new energy power station.

[0013] In one embodiment of the present invention, the heat exchange and energy storage component further includes a hot air circulation component, the air outlet of which is connected to the bottom of the heat exchange and energy storage box, and the air inlet of which is connected to the top of the heat exchange and energy storage box.

[0014] In one embodiment of this utility model, the heat-absorbing molten salt circulation pipe passes through the heat exchange storage box, the heat-releasing molten salt circulation pipe passes through the heat exchange storage box, the portions of the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe located in the heat exchange storage box are staggered in the height direction, the positions of the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe entering and exiting the heat exchange storage box are arranged opposite to each other, and the hot air circulation component agitates the quartz sand particles in the heat exchange storage box.

[0015] In one embodiment of the present invention, the portions of the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe located inside the heat exchange storage box are both serpentine pipes, and both the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe are evenly distributed inside the heat exchange storage box.

[0016] In one embodiment of the present invention, the heat exchange storage tank has several independent chambers arranged along the axial direction of the heat-absorbing molten salt circulation pipe or the heat-releasing molten salt circulation pipe, and the hot air circulation component agitates the quartz sand particles in the chambers.

[0017] In one embodiment of the present invention, adjacent chambers are separated by stainless steel plates, and the width of the chambers is 3-10m.

[0018] In one embodiment of the present invention, an air distribution pipe is provided at the bottom of the chamber, and the hot air circulation component is provided with multiple air inlets at the bottom of each chamber.

[0019] In one embodiment of this utility model, the diameter of the quartz sand particles is 10μm-3mm.

[0020] In one embodiment of the present invention, the heat exchange and energy storage box includes a carbon steel outer layer and a stainless steel inner lining, and the carbon steel outer layer is wrapped with an insulation layer.

[0021] In one embodiment of this utility model, the steam generating unit is connected to a water supply pipe and a steam pipe. Water is supplied through the water supply pipe, and the water and the exothermic molten salt circulation pipe come into contact and absorb heat to form steam. The steam flows out from the steam pipe.

[0022] This utility model also provides a new energy power station, including an energy storage system of molten salt combined with fluidized quartz sand as described in any of the above claims.

[0023] The beneficial effects of this invention are as follows: This invention proposes an energy storage system combining molten salt and fluidized quartz sand. Utilizing the fluid properties of molten salt, it acts as a heat exchange medium during heat absorption and release, absorbing and releasing energy from the new energy power plant. Between energy absorption and release, inexpensive quartz sand particles are used as the heat storage medium. Quartz sand particles are inexpensive, and the mass of quartz sand with the same heat storage capacity is approximately twice that of molten salt. The heat absorbed by the molten salt is transferred to the quartz sand particles for heat storage, significantly reducing the amount of molten salt used and the overall cost of the medium. Simultaneously, the use of two smaller molten salt tanks further reduces equipment investment costs. Compared to existing technologies, this solution uses molten salt only as a heat exchange medium, requiring only about 10% of the amount needed in existing systems. The use of quartz sand particles as the heat storage medium greatly reduces the investment cost of the molten salt heat storage system. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of an energy storage system for molten salt-bonded fluidized quartz sand, which is an example of this utility model.

[0027] The attached figures are labeled as follows:

[0028] 10. Heat-absorbing molten salt tank, 11. Molten salt heating unit, 12. Heater, 13. Heat-absorbing molten salt circulation pipe, 14. Heat-absorbing molten salt circulation pump, 20. Heat exchange storage box, 21. Chamber, 22. Partition, 23. Hot air circulation component, 30. Heat-releasing molten salt tank, 31. Steam generating unit, 32. Water supply pipe, 33. Steam pipe, 34. Heat-releasing molten salt circulation pipe, 15. Heat-releasing molten salt circulation pump. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0032] The specific structure of the energy storage system of molten salt combined with fluidized quartz sand in this utility model is described in conjunction with [reference needed]. Figure 1The energy storage system of molten salt combined with fluidized quartz sand includes:

[0033] The heat absorption circulation assembly includes a molten salt heating unit 11 and a heat absorption molten salt tank 10, as well as a heat absorption molten salt circulation pipe 13 connected to the heat absorption molten salt tank 10. The heat absorption molten salt tank 10 is filled with low-temperature molten salt, which circulates within the heat absorption molten salt tank 10 and the heat absorption molten salt circulation pipe 13. The molten salt heating unit 11 is disposed on the heat absorption molten salt circulation pipe 13.

[0034] The exothermic circulation assembly includes a steam generating unit 31 and an exothermic molten salt tank 30, as well as an exothermic molten salt circulation pipe 34 connected to the exothermic molten salt tank 30. The exothermic molten salt tank 30 is filled with low-temperature molten salt, which circulates within the exothermic molten salt tank 30 and the exothermic molten salt circulation pipe 34. The steam generating unit 31 is disposed on the exothermic molten salt circulation pipe 34.

[0035] A heat exchange and energy storage component, the heat exchange and energy storage component includes a heat exchange and energy storage box 20, the heat exchange and energy storage box 20 is filled with quartz sand particles, and the heat-absorbing molten salt circulation pipe 13 and the heat-releasing molten salt circulation pipe 34 both pass through the heat exchange and energy storage box 20.

[0036] In the heat-absorbing molten salt tank 10, the low-temperature molten salt circulates in the heat-absorbing molten salt circulation pipe 13, is heated into high-temperature molten salt by the molten salt heating unit 11, and then exchanges heat with the quartz sand particles in the heat exchange storage box 20 before becoming low-temperature molten salt and flowing back into the heat-absorbing molten salt tank 10. In the heat-releasing molten salt tank 30, the low-temperature molten salt flows in the heat-releasing molten salt circulation pipe 34, exchanges heat with the quartz sand particles in the heat exchange storage box 20 before becoming high-temperature molten salt, and then releases heat through the steam generating unit 31. The released low-temperature molten salt then flows back into the heat-releasing molten salt tank 30.

[0037] Specifically, the inlet and outlet of the heat-absorbing molten salt circulation pipe 13 are both connected to the heat-absorbing molten salt tank 10. A pump structure can be installed on the heat-absorbing molten salt circulation pipe 13 to pump the molten salt in the heat-absorbing molten salt tank 10, causing the molten salt to circulate within the heat-absorbing molten salt tank 10 and the heat-absorbing molten salt circulation pipe 13, thus realizing the heat absorption and release process. Similarly, the inlet and outlet of the heat-releasing molten salt circulation pipe 34 are both connected to the heat-releasing molten salt tank 30. A pump structure can be installed on the heat-releasing molten salt circulation pipe 34 to pump the molten salt in the heat-releasing molten salt tank 30, causing the molten salt to circulate within the heat-releasing molten salt tank 30 and the heat-releasing molten salt circulation pipe 34, thus realizing the heat release and absorption process. The quartz sand particles in the heat exchange storage tank 20 are used for heat exchange and storage. To ensure better heat exchange performance, flowing quartz sand particles are used.

[0038] In actual implementation, the heat absorption circulation component absorbs energy from solar and wind power. Specifically, the energy from solar and wind power is transferred to the 290°C low-temperature molten salt in the heat absorption molten salt circulation pipe 13 through the molten salt heating unit 11, completing the heat absorption process. Then, the heat exchange and energy storage component exchanges heat with the heat absorption circulation component and stores energy. After heat absorption, the 290°C low-temperature molten salt becomes a 560°C high-temperature molten salt, which enters the heat exchange and energy storage box 20 in the heat absorption molten salt circulation pipe 13. The 560°C high-temperature molten salt transfers heat to the quartz sand particles in the heat exchange and energy storage box 20, raising the temperature of the quartz sand particles to 650°C. Quartz sand particles have good stability below 650°C, are not easily broken, and are inexpensive. After fluidization, they have high thermal conductivity, and the energy is stored in the quartz sand particles. Finally, when energy is needed, the 290°C low-temperature molten salt in the exothermic molten salt circulation pipe 34 passes through the heat exchange storage box 20 via the exothermic circulation component. The energy of the quartz sand particles is transferred to the 290°C low-temperature molten salt, which then gains energy and becomes 560°C high-temperature molten salt. The 560°C high-temperature molten salt carries away the energy through the exothermic molten salt circulation pipe 34 and releases the energy in the steam generation unit 31, thus utilizing the energy.

[0039] Traditional molten salt energy storage systems require a very large amount of molten salt. For example, a molten salt energy storage system with a thermal storage capacity of 3000MWh requires 30,000 tons of binary molten salt, which typically costs around 6,000 yuan per ton, resulting in high system investment. In this solution, molten salt is only used as a heat exchange medium, requiring only about 10% of the amount needed in existing systems. The heat storage medium uses quartz sand or other suitable, inexpensive materials. Quartz sand with the same thermal storage capacity has approximately twice the mass of molten salt, and two tons of quartz sand cost around 800 yuan. The previous two large molten salt tanks (one high-temperature and one low-temperature) are replaced with two small low-temperature molten salt tanks, which also significantly reduces equipment investment. In addition, existing molten salt thermal storage systems contain a large amount of liquid high-temperature molten salt. If the tank leaks, it will cause significant losses and safety hazards. In this solution, the amount of liquid molten salt used is very small, while solid granular quartz sand is used as the heat storage medium. Its poor fluidity means that small leaks will not continue to expand, greatly improving the safety and stability of the system.

[0040] In some embodiments, an endothermic molten salt circulation pump 14 is installed on the endothermic molten salt circulation pipe 13 at the outlet of the endothermic molten salt tank 10, and an exothermic molten salt circulation pump 15 is installed on the exothermic molten salt circulation pipe 34 at the outlet of the exothermic molten salt tank 30. For example, Figure 1 As shown, the heat-absorbing molten salt circulation pump 14 enables the low-temperature molten salt to circulate in the heat-absorbing molten salt circulation pipe 13 and the heat-absorbing molten salt tank 10, and the heat-releasing molten salt circulation pump 15 enables the low-temperature molten salt to circulate in the heat-releasing molten salt circulation pipe 34 and the heat-releasing molten salt tank 30.

[0041] In some embodiments, the molten salt heating unit 11 is a heater 12 connected to a new energy power plant. For example, Figure 1 As shown, the energy (solar energy, wind energy, etc.) collected by the new energy power station is transferred to the molten salt through the molten salt heating unit 11.

[0042] In some embodiments, the heat exchange energy storage assembly further includes a hot air circulation component 23, the outlet of which is connected to the bottom of the heat exchange energy storage box 20, and the inlet of which is connected to the top of the heat exchange energy storage box 20. For example, Figure 1 As shown, by blowing hot air into the bottom of the heat exchange storage tank 20, the quartz sand particles are agitated in the height direction. Referring to the fluidized bed process, the tumbling quartz sand particles can greatly improve the heat exchange efficiency and make the temperature of the quartz sand particles in the heat exchange storage tank 20 uniform. This ensures that the heat of the high-temperature molten salt in the heat absorption molten salt circulation pipe 13 can be quickly transferred to the quartz sand particles, and the heat of the quartz sand can be efficiently transferred to the low-temperature molten salt in the heat release molten salt circulation pipe 34.

[0043] In some embodiments, the heat-absorbing molten salt circulation pipe 13 penetrates the heat exchange storage tank 20, and the heat-releasing molten salt circulation pipe 34 penetrates the heat exchange storage tank 20. The portions of the heat-absorbing molten salt circulation pipe 13 and the heat-releasing molten salt circulation pipe 34 located in the heat exchange storage tank 20 are staggered in the height direction. The positions of the heat-absorbing molten salt circulation pipe 13 and the heat-releasing molten salt circulation pipe 34 entering and exiting the heat exchange storage tank 20 are arranged opposite to each other. The hot air circulation component 23 agitates the quartz sand particles inside the heat exchange storage tank 20. For example, Figure 1 As shown, the high-temperature molten salt in the heat-absorbing molten salt circulation pipe 13 enters the heat exchange storage tank 20 from the left side, gradually decreasing in temperature to become low-temperature molten salt, and then exits the heat exchange storage tank 20 from the right side after heat exchange is achieved. The low-temperature molten salt in the heat-exhausting molten salt circulation pipe 34 enters the heat exchange storage tank 20 from the right side, gradually decreasing in temperature to become high-temperature molten salt, and then exits the heat exchange storage tank 20 from the left side after heat exchange is achieved.

[0044] In some embodiments, the portions of the heat-absorbing molten salt circulation pipe 13 and the heat-releasing molten salt circulation pipe 34 located within the heat exchange storage tank 20 are both serpentine pipes, and both the heat-absorbing molten salt circulation pipe 13 and the heat-releasing molten salt circulation pipe 34 are evenly distributed within the heat exchange storage tank 20. For example, Figure 1 As shown, the heat exchange and storage tank has heat-absorbing and heat-releasing molten salt circulation pipes 13 and 34 staggered along the height direction. Both the heat-absorbing molten salt circulation pipes 13 and 34 can be divided into multiple parallel lines. This can further improve the heat exchange efficiency.

[0045] In some embodiments, the heat exchange storage tank 20 has several independent chambers 21 arranged along the axial direction of the heat-absorbing molten salt circulation pipe 13 or the heat-releasing molten salt circulation pipe 34, and the hot air circulation component 23 agitates the quartz sand particles in the chambers 21. For example, Figure 1 As shown, the tumbling of quartz sand particles within a single chamber 21 can significantly improve heat exchange efficiency and make the temperature of the quartz sand within the single chamber uniform.

[0046] In some embodiments, adjacent chambers 21 are separated by stainless steel plates, and the width of each chamber 21 is 3-10 m. For example, Figure 1 As shown, a stainless steel partition 22 is installed every 3-10m along the internal length of the heat exchange storage box 20, so that the heat storage box is divided into multiple independent compartments. In specific implementation, a stainless steel partition 22 can be installed every 5m.

[0047] In some embodiments, an air distribution duct is provided at the bottom of the chamber 21, and the hot air circulation component 23 is provided with multiple air inlets at the bottom of each chamber 21. For example, Figure 1 As shown, each chamber is equipped with an air distribution duct and multiple air inlets of hot air circulation components 23 at the bottom. By blowing hot air into the bottom of the chamber 21, the quartz sand is agitated in the height direction. The tumbling quartz sand can greatly improve the heat exchange efficiency and make the temperature of the quartz sand in a single chamber uniform, so as to meet the requirement that molten salt and quartz sand particles can achieve rapid heat exchange.

[0048] In some embodiments, the diameter of the quartz sand particles is 10 μm to 3 mm. The diameter of the quartz sand particles should be between 10 μm and 3 mm, as this particle size is more suitable for fluidized bed processes.

[0049] In some embodiments, the heat exchange storage box 20 includes a carbon steel outer layer and a stainless steel inner lining, with an insulation layer covering the outer surface of the carbon steel outer layer. This reduces heat loss from the heat exchange storage box 20.

[0050] In some embodiments, the steam generating unit 31 is connected to a water supply pipe 32 and a steam pipe 33. Water is supplied through the water supply pipe 32, and the water comes into contact with the exothermic molten salt circulation pipe 34, absorbing heat to form steam. The steam flows out from the steam pipe 33. For example, Figure 1 As shown, after water is supplied from water supply pipe 32 to steam generation unit 31, the water will absorb the energy of high-temperature molten salt and turn into steam, which will be output from steam pipe 33. The energy of the steam can be used to generate electricity.

[0051] This invention also provides a new energy power station, including an energy storage system of molten salt combined with fluidized quartz sand according to any of the above embodiments.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An energy storage system using molten salt combined with fluidized quartz sand, characterized in that: A heat-absorbing circulation assembly includes a molten salt heating unit and a heat-absorbing molten salt tank, as well as a heat-absorbing molten salt circulation pipe connected to the heat-absorbing molten salt tank. The heat-absorbing molten salt tank contains low-temperature molten salt, which circulates within the heat-absorbing molten salt tank and the heat-absorbing molten salt circulation pipe. The molten salt heating unit is disposed on the heat-absorbing molten salt circulation pipe. The exothermic circulation assembly includes a steam generating unit and an exothermic molten salt tank, as well as an exothermic molten salt circulation pipe connected to the absorbent molten salt tank. The exothermic molten salt tank contains low-temperature molten salt, which circulates within the exothermic molten salt tank and the exothermic molten salt circulation pipe. The steam generating unit is located on the exothermic molten salt circulation pipe. A heat exchange and energy storage component, the heat exchange and energy storage component including a heat exchange and energy storage box, the heat exchange and energy storage box being filled with quartz sand particles, and the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe both passing through the heat exchange and energy storage box; In the heat-absorbing molten salt tank, the low-temperature molten salt circulates in the heat-absorbing molten salt circulation pipe, is heated into high-temperature molten salt by the molten salt heating unit, and then exchanges heat with the quartz sand particles in the heat exchange storage box before becoming low-temperature molten salt and flowing back into the heat-absorbing molten salt tank. In the heat-releasing molten salt tank, the low-temperature molten salt flows in the heat-releasing molten salt circulation pipe, exchanges heat with the quartz sand particles in the heat exchange storage box before becoming high-temperature molten salt, and then releases heat through the steam generation unit. The released low-temperature molten salt then flows back into the heat-releasing molten salt tank.

2. A fused-salt energy storage system incorporating fluidized quartz sand according to claim 1, characterized by: A heat-absorbing molten salt circulation pump is installed on the heat-absorbing molten salt circulation pipeline at the outlet of the heat-absorbing molten salt tank, and an exothermic molten salt circulation pump is installed on the heat-releasing molten salt circulation pipeline at the outlet of the exothermic molten salt tank.

3. A fused-salt energy storage system in combination with fluidized quartz sand as claimed in claim 1, wherein: The molten salt heating unit is a heater connected to a new energy power station.

4. A fused-salt energy storage system in combination with fluidized quartz sand according to claim 1, characterized in that: The heat exchange and energy storage assembly also includes a hot air circulation component, the air outlet of which is connected to the bottom of the heat exchange and energy storage box, and the air inlet of which is connected to the top of the heat exchange and energy storage box.

5. A fused-salt energy storage system incorporating fluidized quartz sand according to claim 4, wherein: The heat-absorbing molten salt circulation pipe runs through the heat exchange storage box, and the heat-releasing molten salt circulation pipe runs through the heat exchange storage box. The portions of the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe located in the heat exchange storage box are staggered in the height direction. The positions of the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe entering and exiting the heat exchange storage box are arranged opposite to each other. The hot air circulation component agitates the quartz sand particles in the heat exchange storage box.

6. A fused-salt energy storage system in combination with fluidized quartz sand according to claim 5, characterized in that: The portions of both the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe located within the heat exchange and energy storage tank are serpentine pipes, and both the heat-absorbing molten salt circulation pipe and the heat-releasing molten salt circulation pipe are evenly distributed within the heat exchange and energy storage tank.

7. A fused salt bond fluidized quartz sand energy storage system according to claim 4, wherein: The heat exchange storage tank has several independent chambers arranged along the axial direction of the heat-absorbing molten salt circulation pipe or the heat-releasing molten salt circulation pipe, and the hot air circulation component agitates the quartz sand particles in the chambers.

8. A fused salt bond fluidized quartz sand energy storage system according to claim 7, wherein: The adjacent chambers are separated by stainless steel plates, and the width of the chambers is 3-10m.

9. A fused salt bond fluidized quartz sand energy storage system according to claim 8, wherein: The bottom of the chamber is provided with an air distribution duct, and the hot air circulation component is provided with multiple air inlets at the bottom of each chamber.

10. A fused-salt energy storage system in combination with fluidized quartz sand according to claim 1, characterized in that: The diameter of the quartz sand particles is 10μm-3mm.

11. An energy storage system of fused salt binding fluidized quartz sand according to any one of claims 1-10, characterized in that: The heat exchange and energy storage box includes a carbon steel outer layer and a stainless steel inner lining, and the carbon steel outer layer is wrapped with an insulation layer.

12. An energy storage system of fused salt binding fluidized quartz sand according to any one of claims 1-10, characterized in that: The steam generating unit is connected to a water supply pipe and a steam pipe. Water is supplied through the water supply pipe, and the water comes into contact with the exothermic molten salt circulation pipe to absorb heat and form steam. The steam flows out from the steam pipe.

13. A new energy power station, characterized in that: The energy storage system includes the molten salt-bonded fluidized quartz sand as described in any one of claims 1-12.

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