New energy supply coupling method, energy coupling station fused salt unit and temperature control method thereof

Abstract

The invention discloses a new energy energy supply coupling method, an energy coupling station fused salt unit and a temperature control method of the energy coupling station fused salt unit, and relates to the technical field of heating systems.The new energy energy supply coupling method comprises the steps that a solar energy section is composed of a solar photovoltaic panel and a solar heat collection pipe; the air source heat pump unit is used for heating and refrigerating; the shallow ground source heat pump unit exchanges heat with the ground surface through a buried pipe in the shallow buried pipe well; the geothermal wells exchange heat, if medium-deep geothermal water is distributed at the depth of 1000-3000 m, two-hole geothermal well construction heating is conducted, and if geothermal water does not exist, a single well with the depth of 2000-3000 m is constructed, and heating is conducted through a center heat exchange pipe; boiler heating; and the energy coupling station is used for carrying out centralized management and transmission on the energy supply modes and storing the heat energy by utilizing the low-peak electric energy. The system has the effects of reducing energy emission and energy consumption waste during heating and achieving low-carbon and energy-saving heating.

Description

Technical Field

[0001] The present application relates to the technical field of heating systems, and in particular to a new energy supply coupling method, a molten salt unit of an energy coupling station and a temperature control method thereof. Background Art

[0002] In winter, large-scale centralized heating is required in northern my country. Traditional building heating methods such as electricity, natural gas and air source heat pumps will generate a large amount of carbon emissions and electricity consumption. As energy prices rise year by year, heating costs also increase.

[0003] If only air source heat pumps are used for heating, the equipment will occupy a large area and have problems of high noise and high power consumption. If only electric boilers are used for heating, a large amount of carbon emissions will be generated, the cost will be high, and there will be a lot of heat loss along the way. In electric heating, low-peak electricity at night will be used to store molten salt heat, and the stored heat will be used for heating during peak electricity consumption hours. However, this method has the problem of uneven thermal distribution in the molten salt pipeline, which leads to reduced molten salt efficiency and reduced molten salt circulation efficiency, and thus unnecessary energy loss. There are more ways to convert energy into thermal energy than the above. Natural renewable energy such as solar energy and geothermal energy are rarely used in the field of building heating, and due to technical reasons, large-scale and stable heating cannot be achieved.

[0004] Therefore, the existing centralized heating methods have the problems of high energy consumption and high carbon emissions. Summary of the invention

[0005] In order to improve the defects of existing centralized heating methods, such as high energy consumption and high carbon emissions, the present application provides a new energy supply coupling method, an energy coupling station molten salt unit and a temperature control method thereof.

[0006] The new energy supply coupling method provided in this application adopts the following technical solution:

[0007] A new energy supply coupling method, comprising:

[0008] The solar energy section is composed of solar photovoltaic panels and solar thermal collectors, which provide electricity and heat hot water;

[0009] Air source heat pump unit for heating and cooling;

[0010] Shallow ground source heat pump units exchange heat with the ground surface through buried pipes in shallow buried pipe wells, and provide heating or cooling through heat pump units;

[0011] Geothermal well heat exchange: if there is medium-deep geothermal water at a depth of 1000-3000m, two geothermal wells will be constructed, one to extract hot water and the other to return cold water, and heat will be extracted and heated in the ground heat exchanger. If there is no geothermal water, a single well with a depth of 2000-3000m will be constructed to exchange heat in the formation through the central heat exchange pipe;

[0012] Boiler heating, heating when the heat supply is unstable and discontinuous;

[0013] The energy coupling station centrally manages and transmits the above energy supply methods, and uses low-peak electricity to store thermal energy.

[0014] Optionally, in geothermal well heat exchange, if geothermal water is used for heat exchange, the two wells constructed are "eight"-shaped geothermal wells.

[0015] The molten salt unit of an energy coupling station provided in this application adopts the following technical solution:

[0016] A molten salt unit for an energy coupling station, used for the energy storage part of the above energy coupling station, comprising

[0017] Molten salt pipes;

[0018] The heating tube is composed of a multi-petal heating shell, which is divided into multiple sections, wraps the molten salt tube, and is provided with holes for vacuuming;

[0019] Thermal insulation tiles are laid on the inner circumferential wall of the heating shell;

[0020] There are multiple mounting plates, which are mounted on the thermal insulation ceramic sheet, with the length direction parallel to the axial direction of the heating tube and multiple arc grooves spaced apart;

[0021] The heating wire is extended along the inner wall of the heating tube and then bent to be arranged in a serpentine shape. The two ends of the heating wire are located on the same side of the heating shell and extend from the heating shell. The heating wire fits in the arc groove of the mounting plate.

[0022] Fixing clamp, thread the heating thread on the mounting plate and fix it to the mounting plate with bolts;

[0023] A mounting frame, which is installed between two adjacent mounting plates, is arc-shaped and abuts against the circumferential inner wall of the heating shell;

[0024] There are multiple heat reflection plates, which are used to reflect heat radiation and are parallel to the axis of the heating tube and installed on the mounting frame;

[0025] Flow sensors and heat sensors are also installed on the molten salt pipe.

[0026] Optionally, the mounting plate is provided with mounting recessed grooves on both sides of the arc groove, and the end of the mounting frame is located in the mounting recessed groove and is pressed against the mounting recessed groove by a fixing clamp.

[0027] Optionally, a plurality of mounting grooves are provided on the upper surface of the mounting frame, offset grooves are provided on the two inner walls of the mounting grooves, an elastic block is fixed on the same side of the offset grooves, and the elastic block is made of high-temperature resistant rubber material. After the heat reflecting plate is pressed against the elastic block, it can be placed in the mounting groove and pressed against the offset groove on the other side.

[0028] Optionally, two mounting frames located on both sides of the arc groove form a group, and sliding grooves are provided on the upper surfaces of the two mounting frames in one group at positions between the heat reflecting plates, and a heat-resistant adhesive layer is fixedly provided on the bottom wall of the sliding grooves. The two mounting frames in the same group are slidingly connected with the same connecting frame in the relative sliding grooves, and the connecting frame tightens the two mounting frames through the sliding grooves, and a supporting plate is fixedly provided on the top of the connecting frame, and the supporting plate is a ceramic plate for contacting the heating wire.

[0029] Optionally, an arc-shaped placement groove is provided at one end of the circumferential inner wall of the heating shell, and an insertion groove is provided on the circumferential inner wall of the heating shell along the axial direction of the heating tube, and the insertion grooves are multiple and parallel to each other, and a limiting groove is provided on the inner side wall of the insertion groove, and the insertion groove and the limiting groove are connected with the placement groove, and the thermal insulation ceramic piece is inserted into the insertion groove, and the thermal insulation ceramic pieces abut against each other, and both ends of the thermal insulation ceramic piece are made of high temperature resistant rubber material;

[0030] A sealing tile is inserted into the placement groove and fixed by bolts.

[0031] Optionally, the mounting plate and the clamping plate are both made of ceramic materials.

[0032] The present application provides a method for controlling the temperature of a molten salt unit in an energy coupling station using the following technical solutions:

[0033] A method for controlling the temperature of a molten salt unit in an energy coupling station is used for controlling the temperature of the molten salt unit:

[0034] There are at least three flow sensors, which are V1, V2, ..., V in the order of the flow direction of the molten salt. n ;

[0035] There are at least five temperature sensors, one at each flow sensor and one between the flow sensors, and the temperature sensors are W1, W2, ..., W in the order of the flow direction of the molten salt. n ;

[0036] If: (V n -V n-1 )≥0.08V n

[0037] Then for V n and V n-1 Temperature sensor W between n , W n-1 , W n-2 When the heating power of the heating wire is the same, the temperature is compared.

[0038] If W n The temperature is the highest, and the blockage section is at W n and W n-1 The molten salt pipe between the n location;

[0039] If W n-1 The temperature is the highest, and W n-2 Temperature and W n-1 The temperature of the blockage section is closest to W. n-1 and W n-2 The molten salt pipe between the two, otherwise it will be blocked at W n and W n-1 In the molten salt tube between;

[0040] If W n-2 The temperature is the highest, and the blockage section is at W n-1 and W n-2 The molten salt pipe between the n-2 location;

[0041] After the blocked section is determined, the power of the heating wires in at least two adjacent heating tubes from the blocked section to the flow direction of the molten salt is increased. n -V n-1 )<0.08V n The heating wire power is restored.

[0042] Optionally, when the power of the heating wire is increased, the heating wire away from the flow direction of the molten salt is increased first, and after an interval of 40-90s, the power of the heating wires in the remaining heating tubes is increased along the flow direction of the molten salt, and the power increase intervals of the heating wires in adjacent heating tubes are the same.

[0043] In summary, the present application includes at least one of the following beneficial technical effects:

[0044] 1. Make full use of the outer surface space and underground space of the building, couple new energy sources such as mid-layer geothermal energy, shallow geothermal energy, solar energy, air energy, etc., and use low-peak and valley electricity for thermal energy storage and heating, achieving a low-carbon, environmentally friendly and energy-saving heating effect;

[0045] 2. Heat the molten salt pipe of the molten salt energy storage equipment by segmented heating, and use flow sensors and heat sensors to monitor whether the molten salt pipe is blocked, and then control whether the corresponding section is increased in power processing, reduce the probability of molten salt blockage, and improve energy storage efficiency;

[0046] 3. Under the premise that the heating tube is detachable, the inlet and outlet of the heating wire are arranged on the same side, which makes it more convenient to install and remove the heating wire. The heating wire can be stably installed with the installation plate and the fixing clamp, and the heat radiation emitted by the heating wire can be more concentratedly reflected to the molten salt tube through the heat reflection plate, thereby improving the heat utilization efficiency;

[0047] 4. Through formula calculation and sensor distribution, the location of molten salt blockage can be monitored more accurately and effectively, and the intermittent heating of the heating wire in the corresponding section can be accurately and effectively controlled, which is more in line with the law of molten salt flow, not only improving the efficiency of molten salt heat conversion, but also reducing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic diagram of Example 1 of the present application;

[0049] Figure 2 is a schematic diagram of the structure of Example 2 of the present application;

[0050] Figure 3 is a partial cross-sectional view of Example 2 of the present application;

[0051] Figure 4 It is a partial cross-sectional view of the hidden sealing tile of Example 2 of the present application;

[0052] Figure 5 is a partial exploded view showing the mounting frame of Example 2 of the present application;

[0053] Figure 6 yes Figure 5 Part A in the figure shows an enlarged view of the connecting frame in Example 2.

[0054] In the figure, 1. heating tube; 11. heating shell; 111. placement slot; 1111. sealing tile; 112. insertion slot; 1121. limit slot; 12. insulation tile; 2. mounting plate; 21. mounting trough; 22. fixing clamp; 3. mounting frame; 31. heat reflecting plate; 32. mounting slot; 321. offset slot; 3211. elastic block; 33. sliding slot; 331. heat-resistant adhesive layer; 34. connecting frame; 341. supporting plate; 4. heating wire; 5. molten salt tube. DETAILED DESCRIPTION

[0055] The following is combined with Figure 1-6 This application is described in further detail.

[0056] The embodiments of the present application disclose a new energy supply coupling method, an energy coupling station molten salt unit and a temperature control method thereof.

[0057] Example 1

[0058] refer to Figure 1, a new energy supply coupling method includes the following:

[0059] It includes several major heating aspects, including solar energy section, air source heat pump unit, shallow ground source heat pump unit, geothermal well heat exchange and boiler heating.

[0060] The solar energy section consists of solar photovoltaic panels and solar heat collecting tubes installed on the roof to provide electricity and heat hot water. The air source heat pump unit provides heating and cooling.

[0061] The shallow ground source heat pump unit exchanges heat with the ground surface through the buried pipes in the shallow buried pipe well, and provides heating or cooling through the heat pump unit. Generally, holes are drilled in the shallow layer of 100-200m below the foundation, with a spacing of 4-5m, and double U-shaped buried pipes are inserted into the holes. After the circulating water in the U-shaped buried pipe is exchanged with the ground temperature, it is then enriched by the ground source heat pump unit. When operating in summer, the evaporator of the heat pump unit absorbs the heat in the building and reaches the refrigeration air conditioner. At the same time, the condenser discharges the heat to the ground through heat exchange with the ground; when operating in winter, the evaporator of the heat pump unit absorbs the heat of the ground as a heat source, and through the heat pump circulation, the condenser provides hot water to heat the interior of the building.

[0062] There are two ways to exchange heat in geothermal wells: if there is medium-deep geothermal water at a depth of 1000-3000m, a pair of "eight"-shaped geothermal wells at a depth of about 2000m will be constructed, one geothermal well will extract hot water, and the other geothermal well will refill the cold water after heat exchange, and heat will be extracted through ground heat exchangers and heat pumps for heating; if there is no geothermal water at a depth of 1000-3000m, a single well of 2000-3000m can be constructed. The central heat exchange tube is lowered, and the heat from the deep bottom layer is extracted to the ground through the closed water circulation in the central heat exchange tube.

[0063] Boiler electric heating is used when heating is unstable and discontinuous.

[0064] An energy coupling station is set up in the heating section, through which the above-mentioned energy supply mode is centrally managed, controlled and transmitted, and low-peak electricity is used to store and use thermal energy, thereby realizing a low-carbon and energy-saving heating mode.

[0065] Example 2

[0066] refer to Figure 2 and Figure 3 A molten salt unit of an energy coupling station is the energy storage part of the energy coupling station in Example 1. It includes a molten salt tube 5, a heating tube 1, a mounting plate 2, a mounting frame 3, a heat reflection plate 31 and a heating wire 4.

[0067] The molten salt pipe 5 is a pipeline for the molten salt of the molten salt energy storage device. The heating pipe 1 is composed of a multi-petal heating shell 11, which is two petals in this embodiment. The heating pipe 1 is divided into multiple sections to wrap the molten salt pipe 5. The heating pipe 1 is provided with a hole for vacuuming. A flow sensor and a heat sensor are also installed on the molten salt pipe 5. The flow sensor is an ultrasonic type.

[0068] refer to Figure 3 and Figure 4 , an arc-shaped placement groove 111 is provided on one side of the circumferential inner wall of the heating shell 11, and an insertion groove 112 is provided on the circumferential inner wall of the heating shell 11 along the axial direction of the heating tube 1, and the insertion grooves 112 are multiple and parallel to each other. A limiting groove 1121 is provided on the inner side wall of the insertion groove 112, and the insertion groove 112 and the limiting groove 1121 are connected to the placement groove 111. A thermal insulation ceramic 12 is inserted into the insertion groove 112, and the side walls of the thermal insulation ceramics 12 in adjacent insertion grooves 112 abut against each other, and the ends of the thermal insulation ceramics 12 in the same insertion groove 112 abut against each other. The two ends of the thermal insulation ceramic 12 are made of high-temperature resistant rubber material, and in this embodiment, fluororubber. A sealing ceramic 1111 is inserted into the placement groove 111, and the sealing ceramic 1111 is tightly pressed against the end of the thermal insulation ceramic 12. The sealing ceramic 1111 is fastened to the heating shell 11 by bolts.

[0069] The insertion and paving of the thermal insulation tiles 12 can effectively improve the stability of the thermal insulation tiles 12 after paving, and effectively reduce the heat loss through the thermal insulation tiles 12, thereby achieving a good thermal insulation effect and reducing energy waste. The rubber materials at the ends of the thermal insulation tiles 12 are pressed against each other to effectively reduce vibration transmission, thereby increasing the service life of the thermal insulation tiles 12.

[0070] refer to Figure 4 and Figure 5 There are multiple mounting plates 2, which are installed on the thermal insulation ceramic sheet 12 by bolts. The length direction of the mounting plate 2 is parallel to the axial direction of the heating tube 1. In this embodiment, there are two mounting plates 2. A plurality of arc grooves are spaced apart on the upper surface of the mounting plate 2. The heating wire 4 extends along the inner wall of the heating tube 1 and then bends and is arranged in a serpentine shape. Both ends of the heating wire 4 are located on the same side of the heating shell 11 and extend from the heating shell 11, and the portions of the heating wire 4 extending from the heating shell 11 are parallel to each other. The heating wire 4 is fitably placed in the arc groove of the mounting plate 2, and a fixing clip 22 is buckled on the mounting plate 2, which fastens the heating wire 4, and the fixing clip 22 is fixedly connected to the mounting plate 2 by bolts. The mounting plate 2 and the fixing clip 22 are both made of ceramic materials.

[0071] The installation direction of the heating wire 4 can make the two ends of the heating wire 4 parallel to each other and on the same side, so that the heating wire 4 can be easily disassembled and assembled. The mounting plate 2 provides installation and fixation for the heating wire 4 through the fixing clip 22, thereby improving the stability of the installation and fixation of the heating wire 4. The ceramic material of the mounting plate 2 and the fixing clip 22 effectively reduces the heat conduction consumption.

[0072] refer to Figure 5 and Figure 6 The mounting frame 3 is installed between two adjacent mounting plates 2, in an arc shape and abutting against the circumferential inner wall of the heating shell 11. The mounting plates 2 are provided with mounting recessed grooves 21 on both sides of the arc groove, and the ends of the mounting frame 3 are located in the mounting recessed grooves 21 and are pressed against the mounting recessed grooves 21 by the fixing clamps 22. In this way, the mounting frame 3 can be fixed while the heating wire 4 is fixed. A plurality of mounting grooves 32 are provided on the upper surface of the mounting frame 3, and an offset groove 321 is provided on the two inner side walls of the mounting groove 32. An elastic block 3211 is fixed on the same side of the offset groove 321. The elastic block 3211 is made of high temperature resistant rubber material, and in this embodiment, it is a fluororubber material. A heat reflecting plate 31 is inserted and installed in the mounting groove 32. After the heat reflecting plate 31 is pressed against the elastic block 3211, it can be placed in the mounting groove 32 and pressed against the offset groove 321 on the other side, thereby realizing the rapid installation of the heat reflecting plate 31. The heat reflection plate 31 is made of aluminum. The heat reflection plate 31 is set to effectively reflect the heat radiation generated by the heating wire 4 to the molten salt pipe 5, thereby reducing heat waste and improving the heating efficiency of the molten salt pipe 5. On the other hand, the installation of the heat reflection plate 31 can simultaneously reinforce multiple mounting frames 3, thereby improving the integrity of the mounting frames 3.

[0073] The two mounting frames 3 located on both sides of the arc groove form a group. The upper surfaces of the two mounting frames 3 in one group are provided with sliding grooves 33 at positions between the heat reflecting plates 31. The bottom wall of the sliding grooves 33 is fixedly provided with a heat-resistant adhesive layer 331. The two mounting frames 3 in the same group are slidingly connected with the same connecting frame 34 in the opposite sliding grooves 33. The connecting frame 34 tightens the two mounting frames 3 through the sliding grooves 33. A supporting plate 341 is fixedly provided on the top of the connecting frame 34. The supporting plate 341 is a ceramic plate used to abut against the heating wire 4. The supporting plate 341 is an arc-shaped plate. Through the installation of the connecting frame 34, the two adjacent mounting frames 3 are further connected as a whole, thereby improving the stability of the position of the mounting frames 3 after being fixed. At the same time, the heating wire 4 is abutted and supported by the supporting plate 341, thereby improving the stability of the installation of the heating wire 4.

[0074] The implementation principle of Example 2 of the present application is: the pipeline for heating the molten salt pipe 5 is divided into multiple sections for monitoring and heating by a segmented method. By laying the thermal insulation ceramic sheet 12, thermal insulation is effectively performed to reduce heat loss. The heating wire 4 is installed by the mounting plate 2 and the fixing clamp 22, and the mounting frame 3 is installed and fixed at the same time. The mounting frame 3 can not only provide an installation space for the heat reflecting plate 31, but also effectively reflect the heat radiation generated by the heating wire 4 to the molten salt pipe 5 through the setting of the heat reflecting plate 31, thereby improving the heating efficiency of the molten salt pipe 5. After monitoring that the corresponding section is blocked by molten salt, the melting of the molten salt in the corresponding section is accelerated by increasing the power of the heating wire 4 in the corresponding section, thereby improving the efficiency of molten salt circulation and thus improving the heat conversion efficiency.

[0075] Example 3

[0076] A method for controlling the temperature of a molten salt unit in an energy coupling station is used to control the temperature of the molten salt unit described in Example 2. The method comprises the following contents:

[0077] There are at least three flow sensors, which are V1, V2, ..., V in the order of the flow direction of the molten salt. n ;

[0078] There are at least five temperature sensors, one at each flow sensor and one between the flow sensors, and the temperature sensors are W1, W2, ..., W in the order of the flow direction of the molten salt. n ;

[0079] If: (V n -V n-1 )≥0.08V n

[0080] Then for V n and V n-1 Temperature sensor W between n , W n-1 , W n-2 When the heating power of the heating wire is the same, the temperature is compared.

[0081] If W n The temperature is the highest, and the blockage section is at W n and W n-1 The molten salt pipe between the n location;

[0082] If W n-1 The temperature is the highest, and W n-2 Temperature and W n-1 The temperature of the blockage section is closest to W. n-1 and W n-2 The molten salt pipe between the two, otherwise it will be blocked at W n and Wn-1 In the molten salt tube between;

[0083] If W n-2 The temperature is the highest, and the blockage section is at W n-1 and W n-2 The molten salt pipe between the n-2 location;

[0084] After the blocked section is determined, the power of the heating wires 4 in at least two adjacent heating tubes 1 from the blocked section to the flow direction of the molten salt is increased. n -V n-1 )<0.08V n The heating wire power is restored.

[0085] When the power of the heating wire is increased, the heating wire away from the flow direction of the molten salt is increased first, and after an interval of 40-90s, the power of the heating wires in the remaining heating tubes is increased along the flow direction of the molten salt. The power increase intervals of the heating wires in adjacent heating tubes are the same.

[0086] In this way, multiple flow sensors and temperature sensors are used to monitor the flow and temperature of the molten salt in the molten salt pipe in real time. The location of the molten salt blockage can be accurately determined through data comparison, and the power of the heating wire at the corresponding location is temporarily increased through calculation, and the power of the adjacent heating wires in the flow direction is increased in sequence to simulate the effect of the flow of the molten salt after heating, so that the power of the heating wire is increased more accurately, the duration of the molten salt blockage is reduced, and the efficiency of thermal energy storage and conversion is improved.

[0087] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new energy supply coupling method, characterized in that: include The solar energy section is composed of solar photovoltaic panels and solar thermal collectors, which provide electricity and heat hot water; Air source heat pump unit for heating and cooling; Shallow ground source heat pump units exchange heat with the ground surface through buried pipes in shallow buried pipe wells, and provide heating or cooling through heat pump units; Geothermal well heat exchange: if there is medium-deep geothermal water at a depth of 1000-3000m, two geothermal wells will be constructed, one to extract hot water and the other to return cold water, and heat will be extracted and heated in the ground heat exchanger. If there is no geothermal water, a single well with a depth of 2000-3000m will be constructed to exchange heat in the formation through the central heat exchange pipe; Boiler heating, heating when the heat supply is unstable and discontinuous; The energy coupling station centrally manages and transmits the above energy supply methods, and uses low-peak electricity to store thermal energy.

2. A new energy supply coupling method according to claim 1, characterized in that: In geothermal well heat exchange, if geothermal water is used for heat exchange, the two wells constructed will be "eight" shaped geothermal wells.

3. A molten salt unit for an energy coupling station, used as the energy storage part of the energy coupling station according to claim 1, characterized in that: include Molten salt tube (5); The heating tube (1) is composed of a multi-petal heating shell (11) and is divided into multiple sections, which wraps the molten salt tube (5) and is provided with a hole for vacuuming; The heat-insulating ceramic sheet (12) is laid on the circumferential inner wall of the heating shell (11); There are multiple mounting plates (2), which are mounted on the thermal insulation ceramic sheet (12), with the length direction parallel to the axial direction of the heating tube (1) and multiple arc grooves spaced apart; The heating wire (4) extends along the inner wall of the heating tube (1) and then bends to be arranged in a serpentine shape. The two ends of the heating wire (4) are located on the same side of the heating shell (11) and extend from the heating shell (11). The heating wire (4) fits in the arc groove of the mounting plate (2). A fixing clamp (22) is used to buckle the heating wire (4) onto the mounting plate (2) and fix the heating wire (4) to the mounting plate (2) via bolts; A mounting frame (3) is mounted between two adjacent mounting plates (2), is arc-shaped and abuts against the circumferential inner wall of the heating shell (11); A plurality of heat reflection plates (31) for reflecting heat radiation, parallel to the axis of the heating tube (1), and mounted on the mounting frame (3); A flow sensor and a heat sensor are also installed on the molten salt pipe (5).

4. The molten salt unit of an energy coupling station according to claim 3, characterized in that: The mounting plate (2) is provided with mounting recesses (21) on both sides of the arc groove, and the end of the mounting frame (3) is located in the mounting recesses (21) and is pressed against the mounting recesses (21) by a fixing clamp (22).

5. The molten salt unit of an energy coupling station according to claim 3, characterized in that: The upper surface of the mounting frame (3) is provided with a plurality of mounting grooves (32), and two inner side walls of the mounting grooves (32) are provided with offset grooves (321). An elastic block (3211) is fixedly arranged on the same side of the offset grooves (321), and the elastic block (3211) is made of a high-temperature resistant rubber material. After the heat reflection plate (31) is pressed against the elastic block (3211), it can be placed into the mounting groove (32) and pressed against the offset groove (321) on the other side.

6. The molten salt unit of an energy coupling station according to claim 4, characterized in that: The two mounting frames (3) located on both sides of the arc groove form a group. The upper surfaces of the two mounting frames (3) in one group are provided with sliding grooves (33) at positions between the heat reflection plates (31). The bottom walls of the sliding grooves (33) are fixedly provided with a heat-resistant adhesive layer (331). The two mounting frames (3) in the same group are slidingly connected to the same connecting frame (34) in the sliding grooves (33) facing each other. The connecting frame (34) tightens the two mounting frames (3) through the sliding grooves (33). A supporting plate (341) is fixedly provided on the top of the connecting frame (34). The supporting plate (341) is a ceramic plate and is used to abut against the heating wire (4).

7. The molten salt unit of an energy coupling station according to claim 3, characterized in that: An arc-shaped placement groove (111) is provided at one end of the circumferential inner wall of the heating shell (11), and an insertion groove (112) is provided on the circumferential inner wall of the heating shell (11) along the axial direction of the heating tube (1). The insertion grooves (112) are multiple and parallel to each other. A limiting groove (1121) is provided on the inner side wall of the insertion groove (112). The insertion groove (112) and the limiting groove (1121) are connected to the placement groove (111). The thermal insulation ceramic sheet (12) is inserted into the insertion groove (112). The thermal insulation ceramic sheets (12) are in contact with each other. Both ends of the thermal insulation ceramic sheet (12) are made of high-temperature resistant rubber material. A sealing ceramic sheet (1111) is inserted into the placement groove (111), and the sealing ceramic sheet (1111) is fixed by bolts.

8. The molten salt unit of an energy coupling station according to claim 3, characterized in that: The mounting plate (2) and the clamping plate are both made of ceramic materials.

9. A method for controlling the temperature of a molten salt unit in an energy coupling station, used for controlling the temperature of the molten salt unit according to claim 3, characterized in that: There are at least three flow sensors, which are V1, V2, ..., V in the order of the flow direction of the molten salt. n ; There are at least five temperature sensors, one at each flow sensor and one between the flow sensors, and the temperature sensors are W1, W2, ..., W in the order of the flow direction of the molten salt. n ; If: (V n - V n-1 ) ≥ 0.08V n Then for V n and V n-1 Temperature sensor W between n , W n-1 , W n-2 When the heating power of the heating wire (4) is the same, the temperature is compared. If W n The temperature is the highest, and the blockage section is at W n and W n-1 The molten salt tube (5) between the n location; If W n-1 The temperature is the highest, and W n-2 Temperature and W n-1 The temperature of the blockage section is closest to W. n-1 and W n-2 The molten salt pipe (5) between the two ends is blocked. n and W n-1 In the molten salt tube (5) between; If W n-2 The temperature is the highest, and the blockage section is at W n-1 and W n-2 The molten salt tube (5) between the n-2 location; After the blocked section is determined, the power of the heating wires (4) in at least two adjacent heating tubes (1) from the determined blocked section to the flow direction of the molten salt is increased, and (V n -V n-1 )<0.08V n The power of the heating wire (4) is restored at this time.

10. A method for controlling the temperature of a molten salt unit in an energy coupling station according to claim 9, characterized in that: When the power of the heating wire (4) is increased, the heating wire (4) away from the flow direction of the molten salt is increased first, and after an interval of 40-90 seconds, the power of the heating wires (4) in the remaining heating tubes (1) is increased along the flow direction of the molten salt, and the power increase intervals of the heating wires (4) in adjacent heating tubes (1) are the same.

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