Supporting liquid-solid two-phase heat storage and release cluster heat well device

Abstract

The application discloses a support type liquid-solid two-phase heat storage and release cluster heat well device, and the bottom of the heat well is provided with a molten salt precipitation device, the molten salt outlet of the molten salt precipitation device is communicated with a molten salt collecting box, a salt tank heat transfer pipe row is arranged in the molten salt collecting box, a molten salt spiral uniform distribution spraying device, an internal steam-water connecting pipe of the heat well, a spiral pipe row and a solid heat storage medium are sequentially arranged in the heat well from top to bottom; a water supply pipeline is communicated with a medium-pressure steam pipeline through the salt tank heat transfer pipe row, the spiral pipe row and the internal steam-water connecting pipe of the heat well; the inlet of a high-temperature molten salt pump is communicated with the outlet of the molten salt collecting box, and the outlet of the high-temperature molten salt pump is communicated with the molten salt spiral uniform distribution spraying device through a molten salt pump outlet molten salt connecting pipeline, a 6KV molten salt electric heater and an electric heater outlet molten salt pipeline, and the system has the characteristics of large heat storage scale, small energy storage and heat dissipation loss, small influence of bad environment, convenient maintenance and safety and reliability.

Description

Technical Field

[0001] This invention belongs to the field of power system energy storage and relates to a supported liquid-solid two-phase heat storage and release cluster thermal well device. Background Technology

[0002] Currently, solar and wind power generation is unstable, requiring extensive deep peak shaving for coal-fired units. Existing solar thermal energy storage projects, including decoupled molten salt energy storage projects with cold and hot tanks from coal-fired units, require over 20,000 tons of nitrate to reach a storage capacity of 100MW. With the gradual growth of the electricity spot market, nitrate consumption is increasing significantly year by year, and nitrate prices are also rising sharply, significantly increasing the construction costs of molten salt energy storage projects. The large-scale use of nitrates also complicates the management of major hazardous sources of hazardous chemicals by production units, making on-site salt leakage response extremely difficult. Therefore, a molten salt energy storage device is needed that offers large storage capacity, low cost, minimal heat loss, minimal susceptibility to harsh environments, ease of maintenance, and easy safety management. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a thermal well device and a supported liquid-solid two-phase heat storage and release cluster thermal well device. This system has the characteristics of large heat storage scale, small energy storage heat loss, small impact from harsh environment, convenient maintenance and safety and reliability.

[0004] To achieve the above objectives, the present invention discloses a hot well device, including a hot well, a molten salt collection tank, a water supply pipeline, a medium-pressure steam pipeline, a high-temperature molten salt pump, a molten salt connection pipeline at the outlet of the molten salt pump, a 6KV molten salt electric heater, and a molten salt pipeline at the outlet of the electric heater.

[0005] A molten salt precipitation device is installed at the bottom of the hot well. The molten salt outlet of the molten salt precipitation device is connected to a molten salt collection box. The molten salt collection box is equipped with a salt tank heat transfer tube bank. From top to bottom, the hot well is equipped with a molten salt spiral uniform spraying device, a steam-water connection pipe inside the hot well, a spiral tube bank, and a solid heat storage medium.

[0006] The water supply pipeline is connected to the medium-pressure steam pipeline via the salt tank heat transfer tube bank, spiral tube bank, and steam-water connection pipe inside the hot well; the inlet of the high-temperature molten salt pump is connected to the outlet of the molten salt collection box, and the outlet of the high-temperature molten salt pump is connected to the molten salt spiral uniform spraying device via the molten salt pump outlet molten salt connection pipe, the 6KV molten salt electric heater and the electric heater outlet molten salt pipe.

[0007] A further improvement of the thermal well device of the present invention is that:

[0008] Furthermore, it also includes thermal well steel frames, with the upper end of each thermal well steel frame fixed to the side of the thermal well.

[0009] Furthermore, a top support is provided at the top of the hot well.

[0010] Furthermore, a spring fixing device is provided on the top bracket.

[0011] Furthermore, it also includes a hydrophobic expansion container connecting pipe, which is connected to the water supply pipe.

[0012] Furthermore, a drainage valve for the drainage expansion container is installed on the connecting pipe.

[0013] Furthermore, the steam-water process is as follows: the feedwater output from the feedwater pipeline passes through the heat transfer tube bank and spiral tube bank of the salt tank to absorb heat, then passes through the steam-water connection pipe inside the hot well to absorb heat, and then enters the medium-pressure steam pipeline.

[0014] Furthermore, the molten salt process is as follows: the molten salt output from the high-temperature molten salt pump enters the molten salt spiral uniformly distributed spraying device after passing through the molten salt connection pipe at the outlet of the molten salt pump, the 6KV molten salt electric heater, and the molten salt pipe at the outlet of the electric heater. Then, it is sprayed out by the molten salt spiral uniformly distributed spraying device and filled into the solid heat storage medium for heat storage. After that, it sinks to the position of the molten salt precipitation device and flows into the molten salt collection box.

[0015] This invention discloses a supported liquid-solid two-phase heat storage and release cluster thermal well device, comprising several thermal well devices. Each thermal well device includes a thermal well, a molten salt collection tank, a water supply pipeline, a medium-pressure steam pipeline, a high-temperature molten salt pump, a molten salt pump outlet molten salt connection pipeline, a 6kV molten salt electric heater, and an electric heater outlet molten salt pipeline. A molten salt precipitation device is installed at the bottom of the thermal well, and the molten salt outlet of the molten salt precipitation device is connected to the molten salt collection tank. The molten salt collection tank is equipped with a salt tank heat transfer tube array. From top to bottom, the thermal well is equipped with a molten salt spiral uniformly distributed spraying device, a steam-water connection pipe inside the thermal well, a spiral tube array, and a solid heat storage medium. The water supply pipeline is connected to the medium-pressure steam pipeline via the salt tank heat transfer tube array, the spiral tube array, and the steam-water connection pipe inside the thermal well. The inlet of the high-temperature molten salt pump is connected to the outlet of the molten salt collection tank, and the outlet of the high-temperature molten salt pump is connected to the molten salt pump outlet molten salt connection pipeline, the 6kV molten salt electric heater, and the electric heater outlet molten salt pipeline to the molten salt spiral uniformly distributed spraying device.

[0016] A further improvement of the supported liquid-solid two-phase heat storage and release cluster thermal well device of the present invention is as follows:

[0017] Furthermore, the thermal well devices are arranged in an array.

[0018] The present invention has the following beneficial effects:

[0019] In specific operation, the hot well device and the supported liquid-solid two-phase heat storage and release cluster hot well device described in this invention have the following characteristics: the feedwater output from the feedwater pipeline passes through the salt tank heat transfer tube bank and the spiral tube bank to absorb heat, and then passes through the steam-water connection pipe inside the hot well to absorb heat before entering the medium-pressure steam pipeline; the molten salt output from the high-temperature molten salt pump passes through the molten salt connection pipe at the outlet of the molten salt pump, the 6KV molten salt electric heater, and the molten salt pipe at the outlet of the electric heater before entering the molten salt spiral uniformly distributed spraying device, and then is sprayed out by the molten salt spiral uniformly distributed spraying device and filled into the solid heat storage medium for heat storage, and then sinks to the position of the molten salt precipitation device and flows into the molten salt collection tank. The feedwater continuously absorbs heat in the salt tank heat transfer tube bank, the spiral tube bank, and the steam-water connection pipe inside the hot well to improve the heat exchange efficiency of the hot well device, enhance the peak-shaving response capability of the unit, give full play to the survivability of the power plant under the spot trading mode, and absorb the abandoned power of the new energy power system. In addition, the thermal well system involved in this invention is composed of several thermal well devices, and has the characteristics of large thermal storage capacity, small energy storage heat loss, less affected by harsh environment, convenient maintenance and safety and reliability. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the steam-water process in the spiral tube outlet 4 of the present invention;

[0023] Figure 3 This is a diagram showing the cluster layout of the thermal well device in this invention.

[0024] Among them, 1 is the hot well steel frame, 2 is the hot well, 3 is the water supply pipe, 4 is the spiral tube bank, 5 is the medium-pressure steam pipe, 6 is the top support, 7 is the 6KV molten salt electric heater, 8 is the internal steam-water connection pipe of the hot well, 9 is the spring fixing device, 10 is the molten salt collection box, 11 is the high-temperature molten salt pump, 12 is the molten salt connection pipe at the outlet of the molten salt pump, 13 is the molten salt pipe at the outlet of the electric heater, 14 is the molten salt spiral uniform spraying device, 15 is the molten salt precipitation device, 16 is the solid heat storage medium, and 17 is the salt tank heat transfer tube bank. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0029] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0030] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0033] Example 1

[0034] refer to Figure 1 The hot well device of the present invention includes a hot well 2, a molten salt collection tank 10, a water supply pipe 3, a medium-pressure steam pipe 5, a high-temperature molten salt pump 11, a molten salt connection pipe 12 at the outlet of the molten salt pump, a 6KV molten salt electric heater 7, and a molten salt pipe 13 at the outlet of the electric heater; a molten salt precipitation device 15 is provided at the bottom of the hot well 2, and the molten salt outlet of the molten salt precipitation device 15 is connected to the molten salt collection tank 10. The molten salt collection tank 10 is provided with a salt tank heat transfer tube array 17, and molten salt spiral homogenizers are arranged sequentially from top to bottom inside the hot well 2. The system includes a spraying device 14, a steam-water connection pipe 8 inside the hot well, a spiral tube bank 4, and a solid heat storage medium 16; a water supply pipe 3 is connected to a medium-pressure steam pipe 5 via a salt tank heat transfer pipe bank 17, a spiral tube bank 4, and a steam-water connection pipe 8 inside the hot well; the inlet of a high-temperature molten salt pump 11 is connected to the outlet of a molten salt collection box 10, and the outlet of the high-temperature molten salt pump 11 is connected to a molten salt spiral uniform spraying device 14 via a molten salt pump outlet molten salt connection pipe 12, a 6KV molten salt electric heater 7, and an electric heater outlet molten salt pipe 13.

[0035] Example 2

[0036] refer to Figure 1To improve the hot well device, the hot well device of the present invention includes a hot well steel frame 1, a hot well 2, a water supply pipe 3, a spiral tube bank 4, a medium-pressure steam pipe 5, a top support 6, a 6KV molten salt electric heater 7, a steam-water connection pipe inside the hot well 8, a spring fixing device 9, a molten salt collection box 10, a high-temperature molten salt pump 11, a molten salt connection pipe at the outlet of the molten salt pump 12, a molten salt connection pipe at the outlet of the electric heater 13, a molten salt spiral uniform spraying device 14, a molten salt precipitation device 15, a solid heat storage medium 16, and a salt tank heat transfer tube bank 17.

[0037] The upper end of each hot well steel frame 1 is fixed to the side of the hot well 2. A molten salt precipitation device 15 is provided at the bottom of the hot well 2. The molten salt outlet of the molten salt precipitation device 15 is connected to the molten salt collection box 10. The molten salt collection box 10 is provided with a salt box heat transfer tube row 17. From top to bottom, the hot well 2 is provided with a molten salt spiral uniform spraying device 14, a hot well internal steam-water connection pipe 8, a spiral tube row 4, and a solid heat storage medium 16.

[0038] Water supply pipe 3 is connected to medium-pressure steam pipe 5 via salt tank heat transfer pipe 17, spiral pipe 4, and steam-water connection pipe 8 inside hot well; the inlet of high-temperature molten salt pump 11 is connected to the outlet of molten salt collection box 10, and the outlet of high-temperature molten salt pump 11 is connected to molten salt spiral uniform spraying device 14 via molten salt pump outlet molten salt connection pipe 12, 6KV molten salt electric heater 7 and electric heater outlet molten salt pipe 13.

[0039] The top of the hot well 2 is provided with a top support 6, and the top support 6 is provided with a spring fixing device 9.

[0040] The steam-water process is as follows: the feedwater output from the feedwater pipe 3 passes through the salt tank heat transfer tube bank 17 and the spiral tube bank 4 to absorb heat, then passes through the steam-water connection pipe 8 inside the hot well to absorb heat, and then enters the medium-pressure steam pipe 5. The molten salt process is as follows: the molten salt output from the high-temperature molten salt pump 11 passes through the molten salt connection pipe 12 at the outlet of the molten salt pump, the 6KV molten salt electric heater 7, and the molten salt pipe 13 at the outlet of the electric heater, and then enters the molten salt spiral uniform distribution spraying device 14. It is then sprayed out by the molten salt spiral uniform distribution spraying device 14 and fills the solid heat storage medium 16 for heat storage. Then it sinks to the position of the molten salt precipitation device 15 and flows into the molten salt collection box 10. The molten salt collection box 10 is equipped with a salt tank heat transfer tube bank 17 to adjust the temperature of the molten salt, realizing the large-scale conversion of electrical energy into heat energy, and converting the heat energy into medium-pressure steam for users.

[0041] Example 3

[0042] refer to Figure 2 and Figure 3The supported liquid-solid two-phase heat storage and release cluster thermal well device of the present invention includes several thermal well devices, which are arranged in an array. The thermal well device is characterized in that it includes a thermal well 2, a molten salt collection box 10, a water supply pipe 3, a medium-pressure steam pipe 5, a high-temperature molten salt pump 11, a molten salt connection pipe 12 at the outlet of the molten salt pump, a 6KV molten salt electric heater 7, and a molten salt outlet pipe 13 at the outlet of the electric heater.

[0043] A molten salt precipitation device 15 is installed at the bottom of the hot well 2. The molten salt outlet of the molten salt precipitation device 15 is connected to the molten salt collection box 10. The molten salt collection box 10 is equipped with a salt tank heat transfer tube row 17. From top to bottom, the hot well 2 is equipped with a molten salt spiral uniformly distributed spraying device 14, a hot well internal steam-water connection pipe 8, a spiral tube row 4, and a solid heat storage medium 16. The water supply pipe 3 is connected to the medium-pressure steam pipe 5 via the salt tank heat transfer tube row 17, the spiral tube row 4, and the hot well internal steam-water connection pipe 8. The inlet of the high-temperature molten salt pump 11 is connected to the outlet of the molten salt collection box 10. The outlet of the high-temperature molten salt pump 11 is connected to the molten salt spiral uniformly distributed spraying device 14 via the molten salt pump outlet molten salt connection pipe 12, the 6KV molten salt electric heater 7, and the electric heater outlet molten salt pipe 13.

[0044] Example 4

[0045] The thermal well unit utilizes electric thermal storage to store heat. Each thermal well unit can achieve a storage capacity of 50MWh-70MWh. If 16 cluster thermal well units operate at full load, the storage capacity can reach 800MWh-1120MWh. The cluster thermal well unit can be replicated in a 16-unit configuration, significantly increasing the storage capacity to 2000MWh. The thermal well unit primarily uses a solid thermal storage medium (16) for energy storage, with liquid molten salt acting as an intermediate heat transfer medium. With its high operating temperature, high thermal stability, high specific heat capacity, high convective heat transfer coefficient, low viscosity, and low saturated vapor pressure, the thermal well unit provides a green, environmentally friendly, safe, and stable large-scale medium- and high-temperature thermal storage solution. It solves the peak-shaving problem of coupled coal-fired power units and the economical heating and steam supply problems of industrial parks.

[0046] The specific working process of this invention is as follows:

[0047] When the hot well unit is started from a cold state, medium-pressure steam is fed back to the steam-water system of the hot well unit to ensure that the temperature of the molten salt collection box 10 reaches 170°C. Then, the high-temperature molten salt pump 11 can be started and the 6KV molten salt electric heater 7 can be put into operation. At the same time, the back-feeding steam operation is stopped and the drain valve to the drain expansion container is closed.

[0048] When the thermal well device is storing heat, all electric valves of the steam-water system are closed. Liquid molten salt is circulated inside the thermal well device by the high-temperature molten salt pump 11. During the circulation process, the 6KV molten salt electric heater 7 is put into operation to ensure that the temperature of the solid heat storage medium 16 at the top and middle of the thermal well device is maintained above 400℃. When the temperature of the molten salt collection box 10 approaches 300℃, the heat storage process is completed. First, the 6KV molten salt electric heater 7 is stopped, and then the high-temperature molten salt pump 11 is stopped.

[0049] When the thermal well device releases heat, the control valve on the medium-pressure steam pipeline 5 is opened, and the unit feedwater electric valve is opened to deliver 150°C water to the steam-water system inside the thermal well device for heat absorption, thereby generating high-temperature steam that meets the parameter requirements. During the heat release process of the thermal well device, when the temperature of the molten salt collection tank 10 drops to 170°C, the feedwater electric control valve is closed and the high-temperature molten salt pump 11 is started to balance the temperature of the low-temperature molten salt at the bottom with the solid heat storage medium 16 at the top. When the temperature of the molten salt collection tank 10 reaches 230°C, the high-temperature molten salt pump 11 is stopped, and the heat release of the thermal well device ends.

[0050] The thermal well 2, supported by the thermal well steel frame 1, has a compact structure, small footprint, and uniform stress distribution throughout the device, reducing the occurrence of molten salt leakage. Because it is suspended, the thermal well device expands freely in a hot state, with minimal contact area with the external environment and minimal heat loss. The cluster expansion of the thermal well steel frame 1 can be carried out by replicating individual units.

[0051] The spiral tube bank 4 achieves a stable supply of outlet steam parameters by varying the tube diameter and adjusting the density of the temperature field. Because the spiral tube bank 4 is surrounded by a solid heat storage medium 16, its heat exchange efficiency is high. During the heat release process of the thermal well device, the high-temperature molten salt pump 11 can be started to ensure that the high-temperature molten salt fills the gaps in the solid heat storage medium 16, thereby improving the heat exchange efficiency of the spiral tube bank 4.

[0052] The molten salt precipitation device 15 is located below the molten salt level in the molten salt collection tank 10 and is equipped with annular through holes. The holes are denser at the bottom and gradually become more sparser upwards, with a hole diameter not exceeding 1.5 mm. An inverted funnel is arranged in the middle of the molten salt precipitation device 15 to serve as the surface area for molten salt precipitation. The hole spacing of the inverted funnel must also meet the above requirements. This ensures that when the high-temperature molten salt pump 11 is operating at maximum power, the amount of molten salt flowing out of the molten salt precipitation device 15 is greater than the flow rate of molten salt into the thermal well device. When the thermal well device is operating at full power, the minimum liquid level in the molten salt collection tank 10 is greater than 500 mm.

[0053] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0054] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A thermal well device, characterized in that, It includes a hot well (2), a molten salt collection box (10), a water supply pipeline (3), a medium-pressure steam pipeline (5), a high-temperature molten salt pump (11), a molten salt connection pipeline at the outlet of the molten salt pump (12), a 6kV molten salt electric heater (7), and a molten salt pipeline at the outlet of the electric heater (13); A molten salt precipitation device (15) is provided at the bottom of the hot well (2). The molten salt outlet of the molten salt precipitation device (15) is connected to the molten salt collection box (10). The molten salt collection box (10) is provided with a salt tank heat transfer tube bank (17). From top to bottom, the hot well (2) is provided with a molten salt spiral uniform spraying device (14), a steam-water connection pipe (8) inside the hot well, a spiral tube bank (4), and a solid heat storage medium (16). The water supply pipe (3) is connected to the medium-pressure steam pipe (5) via the salt tank heat transfer pipe (17), the spiral pipe (4), and the steam-water connection pipe (8) inside the hot well; the inlet of the high-temperature molten salt pump (11) is connected to the outlet of the molten salt collection box (10), and the outlet of the high-temperature molten salt pump (11) is connected to the molten salt spiral uniform spraying device (14) via the molten salt pump outlet molten salt connection pipe (12), the 6kV molten salt electric heater (7), and the electric heater outlet molten salt pipe (13).

2. The thermal well apparatus according to claim 1, characterized in that, It also includes a hot well steel frame (1), the upper end of which is fixed to the side of the hot well (2).

3. The thermal well apparatus according to claim 1, characterized in that, A top support (6) is provided at the top of the hot well (2).

4. The thermal well apparatus according to claim 3, characterized in that, A spring fixing device (9) is provided on the top bracket (6).

5. The thermal well apparatus according to claim 1, characterized in that, It also includes a hydrophobic expansion container connecting pipe, which is connected to the water supply pipe.

6. The thermal well apparatus according to claim 5, characterized in that, The drain valve of the drain expansion container is installed on the connecting pipe.

7. The thermal well apparatus according to claim 1, characterized in that, The steam-water process is as follows: the water output from the water supply pipe (3) passes through the heat transfer tube bank (17) and spiral tube bank (4) in sequence to absorb heat, and then passes through the steam-water connection pipe (8) inside the hot well to absorb heat, and then enters the medium-pressure steam pipe (5).

8. The thermal well apparatus according to claim 1, characterized in that, The molten salt process is as follows: the molten salt output by the high-temperature molten salt pump (11) enters the molten salt spiral uniform spraying device (14) after passing through the molten salt connection pipe (12) at the outlet of the molten salt pump, the 6kV molten salt electric heater (7) and the molten salt pipe (13) at the outlet of the electric heater. Then it is sprayed out by the molten salt spiral uniform spraying device (14) and filled into the solid heat storage medium (16) for heat storage. Then it sinks to the position of the molten salt precipitation device (15) and flows into the molten salt collection box (10).

9. A supported liquid-solid two-phase heat storage and release cluster thermal well device, characterized in that, Includes the thermal well apparatus as described in any one of claims 1-8.

10. The supported liquid-solid two-phase heat storage and release cluster thermal well device according to claim 9, characterized in that, The thermal well units are arranged in an array.

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