Multi-cavity heat storage and energy supply equipment with mineral particles as media

Abstract

The invention relates to multi-cavity heat storage and energy supply equipment taking mineral particles as a heat storage medium. The system comprises a main equipment subsystem, an auxiliary equipment subsystem and an Internet of Things intelligent control subsystem. The main body equipment subsystem comprises a heating cavity, a heat storage cavity and a heat supply cavity. And the accessory equipment subsystem comprises an electric control cabinet connected with an external power supply, a heat exchanger for external heating, a heat exchanger for supplying hot water, a heat exchanger for supplying steam, a heat exchanger for molten salt and conduction oil, and mechanical transmission equipment. The Internet of Things intelligent control subsystem comprises a sensor subsystem, a data center subsystem and a remote control subsystem. A mineral particle heat dissipation area is required to be arranged and comprises a low-temperature heat dissipation area and a high-temperature heat dissipation area.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and particularly to a device that uses mineral particles as heat storage media, relies on gravity to drive the mineral particles to flow, and uses multiple cavities in linkage to complete heat storage and energy supply. The principle, method and process flow are also important components of the present invention. Background Art

[0002] The threshold for distributed power generation to access the grid is getting higher and higher, and most distributed power will be wasted because it cannot be fully connected to the grid. Choosing the right form of energy storage to store excess electricity has gradually become a focus of attention in the new energy field.

[0003] The difference between peak and valley power consumption in cities is increasing year by year, and the power grid operation losses urgently need appropriate technology and equipment to adjust the peak. Converting electricity into heat is an effective solution.

[0004] There are many types of waste heat in cities, including industrial waste heat, solar thermal energy, biomass heating, etc., all of which have been wasted to varying degrees. It has become a need to collect waste heat, convert it from low-grade thermal energy to high-grade thermal energy or other forms of energy, and use it in off-peak hours.

[0005] To solve the aforementioned surplus electricity, common chemical energy storage methods are costly and have a short service life.

[0006] To solve the aforementioned waste heat, the common heat storage media in China are water, molten salt and magnesia bricks.

[0007] The water heat storage device is limited to a water temperature of 100°C. When the temperature exceeds 100°C, safety measures must be taken according to the pressure vessel.

[0008] In order to ensure the fluidity of molten salt, the molten salt heat storage device must always maintain a high temperature of more than 180°C, which increases the system safety protection cost. General molten salt heat storage equipment is difficult to apply to small-scale projects. In addition, the flow of molten salt between containers requires power from electric machinery.

[0009] Magnesia brick heat storage is restricted by the shape and weight of the bricks themselves and has poor flexibility. Summary of the invention

[0010] The present invention relates to a multi-cavity heat storage and energy supply equipment using mineral particles as heat storage medium. Aiming at the deficiencies in existing energy storage technology, the equipment stores the surplus electricity, waste heat, waste electricity and waste heat in the city in the form of heat to achieve high-temperature heat storage, and then flexibly supplies energy to the outside in the form of hot water at 50°C to 100°C, or steam ≥100°C.

[0011] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to construct a heat storage and energy supply equipment, including a main equipment subsystem, an auxiliary equipment subsystem, and an Internet of Things intelligent control subsystem. The main equipment subsystem includes a heating cavity 3, a heat storage cavity 4, and a heating cavity 5. The auxiliary equipment subsystem includes an electric control cabinet 1, a heat exchanger 2 for external heat, a heat exchanger 23 for supplying hot water, a heat exchanger 24 for supplying steam, a heat exchanger 25 for molten salt and heat transfer oil, and a mechanical conveying device 9 for transferring the low-temperature sand in the heat dissipation zone to the heating cavity. The Internet of Things intelligent control subsystem includes a sensor subsystem, a data middle platform subsystem, and a remote control subsystem. The present invention requires the configuration of a mineral particle heat dissipation zone, including a low-temperature sand heat dissipation zone and a high-temperature sand heat dissipation zone.

[0012] Preferably, the mineral particles are manually screened or crushed, and have a particle size of 0.2 mm to 3 mm.

[0013] Preferably, the mineral particles are sand.

[0014] Preferably, the temperature of the mineral particles in the equipment is controlled within a range of 0°C to 600°C.

[0015] Preferably: in the main equipment subsystem, mineral particles enter the heat storage cavity 4 and the heat supply cavity 5 from the heating cavity 3 in turn under the action of gravity, pass through the external heat dissipation area 10, and then re-enter the heating cavity 3 through the mechanical conveying equipment 9 for recycling.

[0016] Preferably, the outer wall of each cavity is installed with thermal insulation material, and the thermal resistance value is ≥1m 2 ·K / W.

[0017] Preferably, the feed inlet and the discharge outlet of each cavity are equipped with remote-controlled opening and closing valves.

[0018] Preferably, a thermometer, a pressure gauge and a level meter are installed in each cavity.

[0019] Preferably, the container of each cavity is made of stainless steel.

[0020] Preferably, the heating chamber 3 is divided into a low-temperature heating chamber 11 , a high-temperature heating chamber 12 , and a low-temperature and high-temperature mixed heating chamber 13 .

[0021] Preferably, the low temperature heating cavity 11 is connected to the heat exchanger 2 with external heat by installing a heat transfer oil metal pipe, so as to transfer the external heat to the mineral particles in the low temperature heating cavity 11. The temperature is controlled between 0°C and 300°C according to different external heat sources.

[0022] Preferably, an electric heating device 8 is installed in the high temperature heating cavity 12 and connected to the electric control cabinet 1 to achieve connection with an external power supply. By means of electric heating, electricity is converted into heat and stored in the high temperature heating cavity 12. The temperature is controlled within 600°C.

[0023] Preferably, both a heat transfer oil metal pipe and an electric heating device 8 are installed in the low-temperature and high-temperature mixed heating cavity 13. The heat transfer oil metal pipe can heat the mineral particles in the cavity to a maximum of 300 degrees Celsius, and the electric heating device 8 can heat the mineral particles in the cavity to a maximum of 600 degrees Celsius.

[0024] Preferably, the heat transfer oil metal pipe is made of 304 stainless steel.

[0025] Preferably, the heat transfer oil metal pipe can be a coil or a tube array.

[0026] Preferably, the electric heating device 8 is an electric heating rod connected in series.

[0027] Preferably, when the temperature of the mineral particles in the heating chamber 13 reaches 600° C., the electric heating device 8 stops heating.

[0028] Preferably, the heat storage cavity 4 is divided into a low-temperature heat storage cavity 14 , a mixed heat storage cavity A 15 , a mixed heat storage cavity B 16 , and a high-temperature heat storage cavity 17 .

[0029] Preferably, the heat storage cavity 4 can be independent of the heating cavity 3 and the heat supply cavity 5, or can be combined with the heating cavity 3 or the heat supply cavity 5.

[0030] Preferably, the heat storage cavity 4 can be built with refractory bricks combined with thermal insulation materials.

[0031] Preferably, the temperature of the low-temperature heat storage cavity 14 and the mixed heat storage cavity A15 is controlled at 0°C-300°C.

[0032] Preferably, the temperature of the high-temperature heat storage cavity 17 and the mixed heat storage cavity B16 is controlled at 300°C-600°C.

[0033] Preferably, the heating cavity 5 is divided into a low-temperature heating cavity 18 , a mixed heating cavity 19 , and a high-temperature heating cavity 20 .

[0034] Preferably, the temperature of the low-temperature heating cavity 18 is controlled at 100° C.-300° C., and a heat transfer oil metal pipe is installed to connect a heat exchanger 23 for supplying hot water.

[0035] Preferably, the heat exchanger 23 for supplying hot water controls the temperature within 100°C.

[0036] Preferably, the temperature of the mixed heating cavity 19 is controlled at 100° C.-300° C., and a heat transfer oil metal pipe is installed and connected to a heat exchanger 24 for supplying steam.

[0037] Preferably, the heat exchanger 24 for supplying steam controls the temperature at 100°C-300°C.

[0038] The high temperature heating cavity 20 is controlled at a temperature of 300° C.-600° C., and is equipped with a molten salt metal pipe to connect a heat exchanger 25 of the molten salt and the heat transfer oil.

[0039] Preferably, the temperature of the heat exchanger 25 connecting the molten salt and the heat transfer oil is controlled at 300°C-400°C.

[0040] Preferably, the heat transfer oil metal pipe is made of 310 stainless steel.

[0041] Preferably, the heat dissipation zone 10 is divided into a low-temperature mineral particle heat dissipation zone 22 and a high-temperature mineral particle heat dissipation zone 21 .

[0042] Preferably, the low-temperature mineral particle heat dissipation area 22 receives the mineral particles unloaded from the low-temperature heating cavity 18 .

[0043] Preferably, the high-temperature mineral particle heat dissipation area 21 receives the mixed heat storage cavity A15, the mixed heat storage cavity B16, the high-temperature heat storage cavity 17, the mixed heat supply cavity 19, and the high-temperature heat supply cavity 20, and unloads the high-temperature mineral particles in an emergency heat dissipation scenario.

[0044] Preferably, the high-temperature mineral particle heat dissipation area 21 should be provided with an isolation area.

[0045] Preferably, the mineral particles in the heat dissipation zone 6 can be re-injected into the heating cavity 3 by the mechanical conveying device 9 after being in equilibrium with the external environment temperature.

[0046] Preferably, the mechanical conveying device 9 is a pneumatic conveyor.

[0047] Preferably, the multi-cavity heat storage equipment has an Internet of Things intelligent control subsystem, including a sensor subsystem, a data middle platform subsystem and an automatic control subsystem.

[0048] Preferably, the sensor subsystem comprehensively monitors the status indicators of each link in the equipment system, including temperature sensors, pressure sensors, flow meters, level meters, meteorological sensors, video sensors, etc.

[0049] Preferably, the objects monitored by the temperature sensor include: mineral particles inside the cavity and the container shell, metal pipes and the fluid heat medium inside the metal pipes, heat medium inside the heat exchange unit, etc.

[0050] Preferably, the temperature sensor monitors a temperature of -50°C to 600°C and has remote data transmission capability.

[0051] Preferably, the pressure sensor monitors objects including: the air pressure inside each cavity, the air pressure inside the metal pipe, the hydraulic pressure inside the heat exchange unit, and the external environmental wind pressure and atmospheric pressure.

[0052] Preferably, the liquid flow meter monitors objects including: fluid input and output in the metal pipe, and heat medium input and output in the heat exchange unit.

[0053] Preferably, the mineral particle flowmeter is mainly used to monitor the input and output of mineral particles in each cavity.

[0054] Preferably, the steam flow meter is mainly used to monitor the fluid in the high-temperature metal pipe and the heat medium in the heat exchange unit at the high-temperature heating cavity end.

[0055] Preferably, the current sensor is used to record power consumption of the equipment.

[0056] Preferably, the data middle platform includes data cleaning, heterogeneity, storage, analysis, etc. If the data value exceeds the safety threshold, the system automatically alarms.

[0057] Preferably, the automatic control subsystem supports remote control, including various control cabinets, valves, switches, lighting equipment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The drawings constituting a part of this application 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 drawings:

[0059] Attached Figure 1 The subsystem structure diagram of the present invention;

[0060] Attached Figure 2 The equipment principle diagram of the present invention;

[0061] Attached Figure 3 Process diagram of embodiment 1;

[0062] Attached Figure 4 Process diagram of embodiment 2;

[0063] Attached Figure 5 Process diagram of embodiment 3;

[0064] Attached Figure 6 Process diagram of embodiment 4; DETAILED DESCRIPTION

[0065] It should be noted that, in the absence of conflict, the features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0066] The described embodiments are only a part of the present application, not all embodiments. Based on the embodiments in the present application, other embodiments obtained by those skilled in the art without creative work should all fall within the scope of protection of the present application.

[0067] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0068] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0069] Example 1

[0070] The external heat source enters the heat exchanger 2 with external heat, heats the heat transfer oil in the metal pipe to 55°C, and then passes through the heat pump, the heat transfer oil is heated to 95°C.

[0071] Low-temperature sand is obtained in the low-temperature mineral heat dissipation area 22, and is loaded into the low-temperature heating chamber 11 through a pneumatic conveyor and a feed ball valve control door 30. In the process of sand falling, under the action of the sand separator 29, the sand falls evenly into the heating chamber 11.

[0072] The heat transfer oil at 95°C heats the sand inside the low-temperature heating cavity 11 to 95°C.

[0073] The sand in the low-temperature heating cavity 11 passes through the discharge control door 31 under the action of gravity and enters the low-temperature heat storage cavity 14 .

[0074] In the low-temperature heat storage cavity 14, after 100 days, the heat loss rate was less than 10% and the sand temperature dropped to 85.5°C.

[0075] The sand passes through the discharge control door 32 of the low-temperature heat storage cavity and enters the low-temperature heating cavity 18.

[0076] There is heat transfer oil in the metal pipe in the low temperature heating cavity 18. The heat medium in the heat exchanger 23 for supplying hot water is water. The heat transfer oil flows between the heat exchanger 23 for supplying hot water and the low temperature heating cavity 18 under the action of a pump.

[0077] The heat in the low-temperature heating cavity 18 is transferred to the heat transfer oil through the outer wall of the metal pipe and exchanges heat with the heat transfer oil in the pipe.

[0078] After the heat transfer oil in the metal pipe enters the heat exchange unit 23 supplying hot water, it transfers heat to the external 15°C water through the metal pipe wall and heats it to 60°C, thereby enabling the heat exchange unit 23 supplying hot water to directly supply hot water to the outside.

[0079] If the heat inside the low-temperature heating cavity 18 is insufficient to provide sufficient heat for the low-temperature heat exchange unit 23, the heat can be supplemented by an electric heater.

[0080] After the heat of the sand in the low-temperature heating cavity 18 can no longer be transferred to the heat-conducting oil in the metal pipe 27, the sand enters the low-temperature sand heat dissipation area 22 from the discharge control door 33 under the action of gravity.

[0081] The low temperature heating cavity 11, the low temperature heat storage cavity 14, and the low temperature heat supply cavity 18 are arranged from top to bottom in space height, and can be different in form and material, and can each have a feed port and a discharge port in connection with each other.

[0082] Example 2

[0083] The external power supply is connected to the electric control cabinet 1 and connected to the electric heating rod 8 inside the high-temperature heating cavity 12 .

[0084] In the low-temperature sand heat dissipation area 22, low-temperature sand is obtained and, under the action of the pneumatic conveyor, passes through the feed control gate 34 and is loaded into the high-temperature heating cavity 12.

[0085] The sand in the high-temperature heating cavity 12 is heated up by the electric heating rod 8. When the temperature reaches 600°C, the electric heating rod 8 is automatically powered off and stops heating.

[0086] The sand in the high-temperature heating cavity 12 passes through the discharge control door 35 and enters the high-temperature heat storage cavity 17 .

[0087] In the high-temperature heat storage cavity 17, the temperature of the sand remains substantially unchanged.

[0088] The sand passes through the discharge control door 36 of the high-temperature heat storage cavity 17 and enters the high-temperature heat supply cavity 20 .

[0089] The metal pipe in the high temperature heating cavity 20 contains molten salt and is connected to the molten salt and heat transfer oil heat exchange unit 25. The heat medium in the molten salt and heat transfer oil heat exchange unit 25 is heat transfer oil.

[0090] The molten salt in the metal pipe 28 absorbs the heat of the sand through the metal pipe wall in the high-temperature heating cavity 20, and the temperature rises to 450°C.

[0091] Under the action of the pump, the molten salt enters the heat exchange unit 25 for molten salt and heat transfer oil, and exchanges heat with the heat transfer oil therein, and the temperature of the heat transfer oil rises to 300°C.

[0092] After the heat transfer oil in the heat exchange unit 25 of molten salt and heat transfer oil obtains heat, it flows into the heat exchanger 24 for supplying steam. The heat medium in the heat exchanger 24 for supplying steam is water, which forms 150°C steam after absorbing the heat of the 300°C heat transfer oil.

[0093] If the high temperature heating cavity 20 continues to lose heat, causing the temperature of the heat transfer oil to drop to, the temperature of the heat transfer oil in the heat exchange unit 25 of the molten salt and the heat transfer oil drops below 200°C, and the molten salt system stops working. At this time, the sand in the high temperature heating cavity 20 can enter the low temperature heating cavity 18 through the discharge control door 37 to continue to provide low temperature heating services.

[0094] The high temperature heating cavity 12, the high temperature heat storage cavity 17, and the high temperature heat supply cavity 20 are arranged from top to bottom in space height, and can be different in form and material, and can each have a feed port and a discharge port in connection with each other.

[0095] Example 3

[0096] Low-temperature sand is obtained in the low-temperature heat dissipation area 22, and under the action of the pneumatic conveyor, the sand is loaded into the low-temperature and high-temperature mixed heating cavity 13 through the feed control gate 38.

[0097] The external heat source, through the heat exchanger 2 that receives heat from the outside, continuously heats the sand in the low-temperature and high-temperature mixed heating cavity 13 until the temperature reaches 100°C.

[0098] The external power supply is connected to the electric control cabinet 1 , connected to the mixing heating cavity 13 , and connected to the electric heating rod 8 .

[0099] The electric heating rod 8 heats the sand in the low temperature and high temperature mixed heating cavity 13. When the sand temperature reaches 300°C, the electric heating rod 8 stops working.

[0100] The discharge control door 39 of the low-temperature and high-temperature mixed heating cavity 13 is opened, and the sand enters the mixed heat storage cavity A15 under the action of gravity.

[0101] In the mixed heat storage cavity A15, after 100 days, the heat loss of the sand was less than 15% and the temperature dropped to 255°C.

[0102] The discharge control door 40 of the mixed heat storage cavity A15 is opened, and the sand enters the mixed heat supply cavity 19 under the action of gravity.

[0103] In the mixed heat supply cavity 19, there is a metal pipe connected to a heat exchange unit 24 for supplying steam from the outside.

[0104] The heat transfer oil in the metal pipe absorbs heat from the sand in the mixed heating cavity 19 and transfers it to the water in the heat exchange unit 24 that supplies steam, thereby completing the supply of hot water or steam to the outside.

[0105] The mixed heating cavity 13, the mixed heat storage cavity A15, and the mixed heat supply cavity 19 are arranged from top to bottom in spatial height. They may be different in form and material. In terms of mutual connection, they may each have a feed port and a discharge port.

[0106] Example 4

[0107] Low-temperature sand is obtained in the low-temperature heat dissipation area 22, and under the action of the pneumatic conveyor, the sand is loaded into the low-temperature and high-temperature mixed heating cavity 13 through the feed control gate 38.

[0108] The external heat source, through the heat exchanger 2 that receives heat from the outside, continuously heats the sand in the low-temperature and high-temperature mixed heating cavity 13 until the temperature reaches 200°C.

[0109] The external power supply is connected to the electric control cabinet 1 , connected to the mixing heating cavity 13 , and connected to the electric heating rod 8 .

[0110] The electric heating rod 8 heats the sand in the low temperature and high temperature mixed heating cavity 13. When the sand temperature reaches 600°C, the electric heating rod 8 stops working.

[0111] The discharge control door 39 of the low-temperature and high-temperature mixed heating cavity 13 is opened, and the sand enters the mixed heat storage cavity A16 under the action of gravity.

[0112] In the mixed heat storage cavity A16, after 100 days, the heat loss of the sand was less than 15% and the temperature dropped to 510℃.

[0113] The discharge control door 40 of the mixed heat storage cavity A16 is opened, and the sand enters the high-temperature heating cavity 20 under the action of gravity.

[0114] In the high-temperature heating cavity 20, a molten salt metal pipe is connected to a heat exchanger 25 for molten salt and heat transfer oil.

[0115] The heat transfer oil in the heat exchanger 25 between molten salt and heat transfer oil is heated from 180° C. to 360° C. during the heat exchange process in the molten salt pipeline.

[0116] The 360°C heat transfer oil in the heat exchanger 25 of molten salt and heat transfer oil flows through the heat exchanger 24 supplying steam, and transfers heat to the 10°C water therein, and the water is heated to 150°C to form steam.

[0117] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A multi-cavity heat storage and energy supply equipment using mineral particles as a medium, including a main equipment subsystem, an auxiliary equipment subsystem, and an Internet of Things intelligent control subsystem. The main equipment subsystem includes a heating cavity 3, a heat storage cavity 4, and a heating cavity 5. The auxiliary equipment subsystem includes an electric control cabinet 1 connected to an external power supply, a heat exchanger 2 for external heat, a heat exchanger 23 for hot water supply, a heat exchanger 24 for steam supply, a heat exchanger 25 for molten salt and heat transfer oil, and a mechanical conveying device 9. The IoT intelligent control subsystem includes a sensor subsystem, a data middle platform subsystem, and a remote control subsystem. The present invention requires the provision of a low-temperature mineral particle heat dissipation area 10 .

2. The mineral particles of claim 1 are manually screened or crushed, and have a particle size of 0.1 mm to 3 mm. The temperature of the mineral particles in the equipment system is controlled within the range of 0°C to 600°C.

3. In the main equipment subsystem of claim 1, the mineral particles, under the control of the IoT intelligent control subsystem, sequentially pass through the heating cavity 3, the heat storage cavity 4, the heating cavity 5, and then enter the external environment heat dissipation area 6, and then re-enter the heating cavity 3 through the mechanical conveying device 9. In terms of spatial height, the heating cavity 3 is higher than the heat storage cavity 4 and the heating cavity 5, and the bottom elevation of all cavities is higher than the top elevation of the heat dissipation area 10, thereby realizing the natural transfer of mineral particles under the action of gravity.

4. The multi-cavity in claim 1 has four types of combinations. First, the multi-cavity-in-one type, that is, one cavity simultaneously completes the heating, heat storage and heat supply functions. Second, the heating cavity 3 is combined with the heat storage cavity 4, and the heat supply cavity 5 is independent. Third, the heat storage cavity 4 is combined with the heat supply cavity 5, and the heating cavity 3 is independent. Fourth, the number of heating cavity 3, heat storage cavity 4, and heat supply cavity 5 can be one or more, and the combination of two is not limited to form a multi-cavity linkage form that is integrated with each other.

5. The multi-cavity in claim 1 has three types of combinations according to temperature, namely, a low-temperature cavity combination sequence, a high-temperature cavity combination sequence, and a mixed cavity combination sequence. The low-temperature cavity combination sequence includes a low-temperature heating cavity 11, a low-temperature heat storage cavity 14, and a low-temperature heating cavity 18. The high-temperature cavity combination sequence includes a high-temperature heating cavity 12, a high-temperature heat storage cavity 17, and a high-temperature heating cavity 20. The mixed cavity combination sequence includes a low-temperature and high-temperature mixed heating cavity 13, a low-temperature and high-temperature mixed heat storage cavity A15, a low-temperature and high-temperature mixed heat storage cavity B16, and a mixed heating cavity 19. The outer walls of each cavity are installed with thermal insulation materials, and the thermal resistance value is ≥1m 2 ·K / W.

6. The low-temperature heating cavity 11 in the low-temperature cavity combination sequence of claim 5 is internally installed with a metal pipe with heat transfer oil as the heat medium, and the pipe is connected to the heat exchanger 2 for external heat. The low-temperature heating cavity 18 in the low-temperature cavity combination sequence is internally installed with a metal pipe with heat transfer oil as the heat medium, and the pipe is connected to the heat exchanger 23 for supplying hot water, thereby realizing the supply of hot water to the outside. The overall temperature of the low-temperature cavity combination sequence is controlled within 100°C.

7. The high-temperature heating cavity 12 in the high-temperature cavity combination sequence in claim 5 has an internal electric heating device 8, which is connected to an external power source through an electric control cabinet 1 to provide a heat source for the mineral particles in the form of electric heating. The high-temperature heating cavity 20 in the high-temperature cavity combination sequence has a metal pipe with molten salt as a heat medium installed inside, and the pipe connects the external molten salt and the heat exchanger 25 of the heat transfer oil. The overall temperature of the high-temperature cavity combination sequence is controlled within 600°C. The heat exchanger 25 of the molten salt and the heat transfer oil is connected to the heat exchanger 24 for supplying steam through a metal pipe with heat transfer oil inside, thereby achieving a temperature drop within 300°C and supplying high-temperature steam to the outside.

8. The low-temperature and high-temperature mixed heating cavity 13 in the low-temperature and high-temperature mixed cavity combination sequence in claim 5 is internally installed with both a metal pipe with heat transfer oil as the heat medium and an electric heating device 8. The metal pipe with heat transfer oil as the heat medium is connected to the heat exchanger 2 of the external heat source. The electric heating device 8 is connected to the external power supply through the electric control cabinet 1. It is characterized in that the initial heat below 100°C is provided by the metal pipe with heat transfer oil as the heat medium, and the heat above 100°C is provided by the electric heating device 8. In the low-temperature and high-temperature mixed cavity sequence, when the heating temperature of the mineral particles is lower than 300°C, the mineral particles are stored in the mixed heat storage cavity A15, and the part of the mineral particles enters the mixed heat supply cavity 19, and is connected to the external steam supply heat exchanger 24 through the metal pipe with heat transfer oil as the heat medium, thereby realizing the external supply of high-temperature steam. When the heating temperature of the mineral particles is between 300°C and 600°C, the mineral particles are stored in the mixed heat storage cavity A16. These mineral particles enter the high-temperature heating cavity 20 and are cooled to below 300°C through the heat exchanger 25 of molten salt and heat transfer oil. They are then supplied with steam through the steam supply heat exchanger 24.

9. The IoT intelligent control subsystem in claim 1 includes a sensor monitoring subsystem, a data middle platform subsystem, and a remote control subsystem. The sensor subsystem includes a thermometer, a pressure gauge, a flow meter, a level meter, and an ammeter. The data middle platform subsystem includes cleaning, heterogeneity, analysis, and storage of sensor data. The remote control subsystem includes a control cabinet, an electric door, a power pump, a fluid flow control device, a current control device, and a mineral particle flow control device.

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