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

Abstract

The invention discloses a supporting type liquid-solid two-phase heat storage and release cluster hot well device which is characterized in that a fused salt precipitation device is arranged at the bottom of a hot well, a fused salt outlet of the fused salt precipitation device is communicated with a fused salt collection box, and a salt box heat transfer pipe row is arranged in the fused salt collection box; a molten salt spiral uniform distribution spraying device, a hot well internal steam-water connecting pipe, a spiral pipe row and a solid heat storage medium are sequentially arranged in the hot well from top to bottom; the water supply pipeline is communicated with the medium-pressure steam pipeline through the salt box heat transfer pipe row, the spiral pipe row and the steam-water connecting pipe in the hot well; an inlet of the high-temperature fused salt pump is communicated with an outlet of the fused salt collecting box, and an outlet of the high-temperature fused salt pump is communicated with the fused salt spiral uniform distribution spraying device through a fused salt pump outlet fused salt connecting pipeline, a 6KV fused salt electric heater and an electric heater outlet fused salt pipeline. The system has the advantages of being large in heat storage scale, small in energy storage and heat dissipation loss, small in severe environment influence, convenient to overhaul, safe and reliable.

Description

Technical Field

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

[0002] At present, solar and wind power generation is unstable, and coal-fired units need to carry out a large amount of deep peak regulation. The solar thermal energy storage power generation project that has been promoted, the cold and hot double-tank molten salt energy storage project with thermal and electrical decoupling of coal-fired units, requires more than 20,000 tons of nitrate when the energy storage scale reaches 100MW. With the gradual growth of the electricity spot trading market, the consumption of nitrate has shown a significant upward trend year by year, and the price of nitrate has also begun to rise sharply year by year, which has greatly increased the construction cost of molten salt energy storage projects. Due to the large-scale use of nitrates, it will also cause difficulties for production units to manage major hazardous sources of hazardous chemicals, and it will be very difficult to deal with salt leakage on site. In view of the above situation, a molten salt energy storage device with large energy storage scale, low cost, small energy storage heat dissipation loss, small impact on harsh environment, convenient maintenance, and easy management of safety is needed. Summary of the invention

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

[0004] To achieve the above object, the present invention discloses a hot well device, including a hot well, a molten salt collection box, a water supply pipeline, a medium-pressure steam pipeline, a high-temperature molten salt pump, a molten salt connecting 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 provided at the bottom of the hot well, and the molten salt outlet of the molten salt precipitation device is connected to a molten salt collection box, and a salt box heat transfer pipe row is provided in the molten salt collection box. A molten salt spiral uniformly distributed spraying device, a steam-water connecting pipe inside the hot well, a spiral pipe row and a solid heat storage medium are sequentially provided in the hot well from top to bottom;

[0006] The water supply pipeline is connected to the medium-pressure steam pipeline through the salt box heat transfer tube row, the spiral tube row, and the steam-water connecting 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 uniformly distributed spraying device through the molten salt pump outlet molten salt connecting pipe, the 6KV molten salt electric heater and the electric heater outlet molten salt pipe.

[0007] The further improvement of the hot well device of the present invention is:

[0008] Furthermore, it also includes heat well steel frames, and the upper ends of the heat well steel frames are fixed on the sides of the heat well.

[0009] Furthermore, a top support is provided on 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 tank connecting pipe, and the hydrophobic expansion tank connecting pipe is connected to the water supply pipe.

[0012] Furthermore, a drain gate of the drain expansion tank is arranged on the drain expansion tank connecting pipe.

[0013] Furthermore, the steam-water process is as follows: the water output from the water supply pipeline absorbs heat through the salt box heat transfer tube row and the spiral tube row in turn, then absorbs heat through the steam-water connecting pipe inside the hot well, and then enters the medium-pressure steam pipeline.

[0014] Furthermore, the molten salt process is as follows: the molten salt output by the high-temperature molten salt pump enters the molten salt spiral uniformly distributed spraying device after passing through the molten salt connecting 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, and then is sprayed out through 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 box.

[0015] The invention discloses a supported liquid-solid two-phase heat storage and release cluster hot well device, comprising a plurality of hot well devices, wherein the hot well device comprises a hot well, a molten salt collection box, a water supply pipeline, a medium-pressure steam pipeline, a high-temperature molten salt pump, a molten salt connecting pipeline at a molten salt pump outlet, a 6kV molten salt electric heater and a molten salt pipeline at an electric heater outlet; a molten salt precipitation device is arranged at the bottom of the hot well, and the molten salt outlet of the molten salt precipitation device is connected with the molten salt collection box, a salt box heat transfer pipe row is arranged in the molten salt collection box, and a molten salt spiral uniformly distributed spraying device, a hot well internal steam-water connecting pipe, a spiral pipe row and a solid heat storage medium are arranged in the hot well from top to bottom; the water supply pipeline is connected with the medium-pressure steam pipeline via the salt box heat transfer pipe row, the spiral pipe row and the hot well internal steam-water connecting pipe; the inlet of the high-temperature molten salt pump is connected with the outlet of the molten salt collection box, and the outlet of the high-temperature molten salt pump is connected with the molten salt spiral uniformly distributed spraying device via the molten salt pump outlet molten salt connecting pipeline, the 6kV molten salt electric heater and the electric heater outlet molten salt pipeline.

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

[0017] Furthermore, the hot well devices are arranged in a formation.

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

[0019] During specific operation of the hot well device and the supported liquid-solid two-phase heat storage and release cluster hot well device described in the present invention, the water output by the water supply pipeline absorbs heat through the salt box heat transfer tube row and the spiral tube row in turn, then absorbs heat through the steam-water connecting pipe inside the hot well, and then enters the medium-pressure steam pipeline; the molten salt output by the high-temperature molten salt pump enters the molten salt spiral uniformly distributed spraying device after passing through the molten salt pump outlet molten salt connecting pipe, the 6KV molten salt electric heater and the electric heater outlet molten salt pipe, and then is sprayed out through 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 box, and the water continuously absorbs heat in the salt box heat transfer tube row, the spiral tube row and the steam-water connecting pipe inside the hot well, so as 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 survival ability of the power plant under the spot trading mode, and absorb the abandoned electricity of the new energy power system. In addition, the heat well system involved in the present invention is integrated through a number of heat well devices, and has the characteristics of large heat storage scale, small energy storage heat dissipation loss, small impact of harsh environment, convenient maintenance, and safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

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

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

[0023] Figure 3 This is a diagram showing the cluster arrangement of the thermal well devices in the present invention.

[0024] Among them, 1 is the hot well steel frame, 2 is the hot well, 3 is the water supply pipeline, 4 is the spiral pipe row, 5 is the medium-pressure steam pipeline, 6 is the top bracket, 7 is the 6KV molten salt electric heater, 8 is the steam-water connecting pipe inside 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 connecting 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 box heat transfer pipe row. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

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

[0028] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0029] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. 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] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] Embodiment 1

[0034] refer to Figure 1 The hot well device of the present invention comprises a hot well 2, a molten salt header box 10, a water supply pipeline 3, a medium-pressure steam pipeline 5, a high-temperature molten salt pump 11, a molten salt connecting pipeline 12 at the outlet of the molten salt pump, a 6KV molten salt electric heater 7 and a molten salt pipeline 13 at the outlet of the electric heater; a molten salt precipitation device 15 is arranged 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 header box 10, and a salt box heat transfer pipe row 17 is arranged in the molten salt header box 10, and molten salt spiral isolating devices are arranged in sequence from top to bottom in the hot well 2. The water supply pipeline 3 is connected with the medium-pressure steam pipeline 5 through the salt box heat transfer pipe row 17, the spiral tube row 4 and the hot well internal steam-water connecting pipe 8; the inlet of the high-temperature molten salt pump 11 is connected with the outlet of the molten salt collecting box 10, and the outlet of the high-temperature molten salt pump 11 is connected with the molten salt spiral uniformly distributed spraying device 14 through the molten salt pump outlet molten salt connecting pipe 12, the 6KV molten salt electric heater 7 and the electric heater outlet molten salt pipe 13.

[0035] Embodiment 2

[0036] refer to Figure 1In order to 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 pipeline 3, a spiral pipe row 4, a medium-pressure steam pipeline 5, a top bracket 6, a 6KV molten salt electric heater 7, a hot well internal steam-water connecting pipe 8, a spring fixing device 9, a molten salt collection box 10, a high-temperature molten salt pump 11, a molten salt pump outlet molten salt connecting pipeline 12, an electric heater outlet molten salt pipeline 13, a molten salt spiral uniformly distributed spraying device 14, a molten salt precipitation device 15, a solid heat storage medium 16 and a salt box heat transfer pipe row 17;

[0037] The upper end of each hot well steel frame 1 is fixed on 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 pipe row 17. The hot well 2 is provided with a molten salt spiral uniformly distributed spraying device 14, a hot well internal steam-water connecting pipe 8, a spiral pipe row 4 and a solid heat storage medium 16 from top to bottom.

[0038] The water supply pipeline 3 is connected to the medium-pressure steam pipeline 5 through the salt box heat transfer pipe row 17, the spiral pipe row 4, and the steam-water connecting 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 uniformly distributed spraying device 14 through the molten salt pump outlet molten salt connecting pipe 12, the 6KV molten salt electric heater 7 and the electric heater outlet molten salt pipe 13.

[0039] A top bracket 6 is provided at the top of the hot well 2 , and a spring fixing device 9 is provided on the top bracket 6 .

[0040] The steam-water process is as follows: the water supplied by the water supply pipe 3 absorbs heat through the salt box heat transfer pipe row 17 and the spiral pipe row 4 in turn, then absorbs heat through the steam-water connecting pipe 8 inside the hot well, and then enters the medium-pressure steam pipe 5. The molten salt process is as follows: the molten salt output by the high-temperature molten salt pump 11 enters the molten salt spiral uniformly distributed spraying device 14 after passing through the molten salt pump outlet molten salt connecting pipe 12, the 6KV molten salt electric heater 7 and the electric heater outlet molten salt pipe 13, and then is sprayed out through the molten salt spiral uniformly distributed spraying device 14 and filled into the solid heat storage medium 16 for heat storage, and then 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 arranged with a salt box heat transfer pipe row 17 to adjust the molten salt temperature, realize large-scale conversion of electrical energy into thermal energy, and convert thermal energy into medium-pressure steam for users.

[0041] Embodiment 3

[0042] refer to Figure 2 and Figure 3The supported liquid-solid two-phase heat storage and release cluster hot well device of the present invention includes a plurality of hot well devices, each of which is arranged in a formation. The hot well device is characterized by including 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 connecting pipeline 12 at the outlet of the molten salt pump, a 6KV molten salt electric heater 7 and a molten salt pipeline 13 at the outlet of the electric heater;

[0043] 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 box 10. The molten salt collection box 10 is provided with a salt box heat transfer pipe row 17. The hot well 2 is provided with a molten salt spiral uniformly distributed spraying device 14, a hot well internal steam-water connecting pipe 8, a spiral pipe row 4 and a solid heat storage medium 16 from top to bottom; the water supply pipeline 3 is connected to the medium-pressure steam pipeline 5 through the salt box heat transfer pipe row 17, the spiral pipe row 4, and the hot well internal steam-water connecting pipe 8; 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 uniformly distributed spraying device 14 through the molten salt pump outlet molten salt connecting pipe 12, the 6KV molten salt electric heater 7 and the electric heater outlet molten salt pipe 13.

[0044] Embodiment 4

[0045] Heat storage can be achieved through the electric heat storage function of the hot well device. The scale of each hot well device can reach 50MWh-70MWh. If the 16 cluster hot well device units are operated at full load, the energy storage scale can reach 800MWh-1120MWh. The cluster hot well device can be replicated in the mode of 16 units, and the corresponding energy storage scale can also be greatly increased to 2000MWh. The hot well device mainly relies on solid heat storage medium 16 for energy storage, and the liquid molten salt plays an intermediate heat transfer process. The hot well device, with its high operating temperature, high thermal stability, high specific heat capacity, high convective heat transfer coefficient, low viscosity and low saturated vapor pressure, provides a green, environmentally friendly, safe and stable large-scale medium and high temperature heat storage solution. It solves the peak regulation problem of coupled coal-fired power units and the economical heating and steam supply problems of industrial parks.

[0046] The specific working process of the present invention is:

[0047] When the hot well device is cold started, the medium-pressure steam is returned to the steam-water system of the hot well device 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 use. At the same time, the steam return operation is stopped and the drain gate of the drain expansion tank is closed.

[0048] When the hot well device is storing heat, all electric doors of the steam-water system are closed, and the liquid molten salt is circulated inside the hot well device through the high-temperature molten salt pump 11. During the circulation process, the 6KV molten salt electric heater 7 is put into use to ensure that the temperature of the solid heat storage medium 16 at the top and middle of the hot well device is maintained above 400°C. The heat storage process is completed when the temperature of the molten salt collection box 10 is close to 300°C. First, the 6KV molten salt electric heater 7 is stopped, and then the high-temperature molten salt pump 11 is stopped.

[0049] When the hot well device releases heat, the control valve on the medium-pressure steam pipeline 5 is opened, and the unit water supply electric door is opened to transport 150°C water to the steam-water system in the hot well device for heat absorption, and then generate high-temperature steam that meets the parameter requirements. During the heat release process of the hot well device, when the temperature of the molten salt header 10 is about to reach 170°C, the water supply electric control door is closed and the high-temperature molten salt pump 11 is started to balance the temperature of the bottom low-temperature molten salt with the top solid heat storage medium 16. When the temperature of the molten salt header 10 reaches 230°C, the high-temperature molten salt pump 11 is stopped, and the heat release of the hot well device ends.

[0050] The hot well 2 supported by the hot well steel frame 1 has a compact structure, a small footprint, and a uniform force on the entire device, which reduces the occurrence of molten salt leakage. Since it is in a suspended state, the hot well device can expand freely in the hot state, has a small contact area with the external environment, and has a small loss of heat preservation and heat dissipation. The cluster expansion of the hot well steel frame 1 can be expanded in the form of unit replication.

[0051] The spiral tube row 4 achieves stable supply of outlet steam parameters by changing the tube diameter and adjusting the density of different temperature fields. Since the spiral tube row 4 is surrounded by the solid heat storage medium 16, the heat exchange efficiency of the spiral tube row 4 is high. In the middle of the heat release process of the hot 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 to improve the heat exchange efficiency of the spiral tube row 4.

[0052] The molten salt precipitation device 15 is below the molten salt liquid level of the molten salt collection box 10, and is provided with annular through holes, the bottom hole gap is relatively dense, and gradually sparse upwards, and the hole diameter is not greater than 1.5mm. An inverted funnel is arranged in the middle of the molten salt precipitation device 15 as an area for molten salt precipitation, and the hole gap arrangement on the inverted funnel must also meet the above requirements. It can ensure that when the high-temperature molten salt pump 11 is running 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 flowing into the hot well device. When the hot well device is running at full power, the minimum liquid level of the molten salt collection box 10 is greater than 500mm.

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

[0054] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A hot well device, characterized in that: It comprises 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 connecting 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); a molten salt outlet of the molten salt precipitation device (15) is connected to a molten salt collection box (10); a salt box heat transfer pipe row (17) is provided in the molten salt collection box (10); and a molten salt spiral uniformly distributed spraying device (14), a hot well internal steam-water connecting pipe (8), a spiral pipe row (4), and a solid heat storage medium (16) are sequentially provided in the hot well (2) from top to bottom; The water supply pipeline (3) is connected to the medium-pressure steam pipeline (5) via the salt box heat transfer pipe row (17), the spiral pipe row (4), and the hot well internal steam-water connecting pipe (8); 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 uniformly distributed spraying device (14) via the molten salt pump outlet molten salt connecting pipe (12), the 6KV molten salt electric heater (7) and the electric heater outlet molten salt pipe (13).

2. The hot well device according to claim 1, characterized in that: It also includes a heat well steel frame (1), and the upper end of each heat well steel frame (1) is fixed on the side of the heat well (2).

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

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

5. The hot well device according to claim 1, characterized in that: It also includes a hydrophobic expansion tank connecting pipe, and the hydrophobic expansion tank connecting pipe is connected to the water supply pipe.

6. The hot well device according to claim 5, characterized in that: A drain gate of the drain expansion tank is arranged on the drain expansion tank connecting pipe.

7. The hot well device according to claim 1, characterized in that: The steam-water flow process is as follows: the water output from the water supply pipe (3) absorbs heat through the salt box heat transfer pipe row (17) and the spiral pipe row (4) in sequence, then absorbs heat through the steam-water connecting pipe (8) inside the hot well, and then enters the medium-pressure steam pipe (5).

8. The hot well device 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 distribution spraying device (14) through the molten salt pump outlet molten salt connecting pipe (12), the 6KV molten salt electric heater (7) and the electric heater outlet molten salt pipe (13), and then is sprayed out through the molten salt spiral uniform distribution spraying device (14) and filled into the solid heat storage medium (16) for heat storage, and then 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 heat well device, characterized in that: The invention comprises a hot well device as described in any one of claims 1 to 8.

10. The supported liquid-solid two-phase heat storage and release cluster heat well device according to claim 9, characterized in that: The hot well devices are arranged in a formation.

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