Molten salt heat storage tank evaporator and working method thereof

Abstract

The invention belongs to the technical field of fused salt heat storage tanks, and discloses a fused salt heat storage tank evaporator and a working method thereof. The molten salt heat storage tank evaporator comprises a molten salt tank and a driving assembly arranged on the molten salt tank. The molten salt tank is provided with a low-temperature area, a high-temperature area and an exhaust pipe communicated with the low-temperature area or the high-temperature area; the top of the high-temperature area is communicated with the top of the low-temperature area through a diversion channel, and the bottom of the high-temperature area is communicated with the bottom of the low-temperature area; a heat exchange pipe is mounted in the low-temperature area through a mounting frame, and a stirring assembly used for stirring fused salt is rotatably arranged in the low-temperature area; an active conveying assembly is arranged in the high-temperature area; an electric heater is mounted in the high-temperature area; the driving assembly is used for driving the stirring assembly and the active conveying assembly. According to the technical scheme, the speed of heating water into steam can be increased, the energy conversion efficiency of fused salt in a high-temperature area is improved, and solidification of fused salt in a low-temperature area is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of molten salt heat storage tanks, and in particular relates to an evaporator of a molten salt heat storage tank and a working method thereof. Background Art

[0002] Molten salt energy storage is a highly efficient energy conversion and storage technology. Its core lies in utilizing the high-temperature melting properties of salts to convert chemical energy into thermal energy, and further convert thermal energy into electrical energy or other forms of dielectric thermal energy when needed. To further explain, molten salt energy storage technology stores thermal energy by heating molten salt to a high temperature state. When energy demand arises, the stored thermal energy is converted into energy to meet electricity or other thermal energy needs. Molten salt energy storage has broad application prospects in the energy field due to its high flexibility, ability to quickly respond to energy fluctuations and the ability to maintain system stability.

[0003] In the existing technology, molten salt energy storage systems usually use molten salt tanks as the core equipment for thermal energy storage and conversion. The internal space of the molten salt tank is divided into a high-temperature zone and a low-temperature zone to achieve efficient management and conversion of the molten salt's thermal energy. Among them, the electric heater is located in the high-temperature zone, responsible for heating the molten salt to the required high temperature state; the heat exchange tube is arranged in the low-temperature zone, used to transfer the thermal energy stored in the molten salt to the water in the tube, heating it into steam, and then used for power generation or other thermal energy applications. During the heat release process of the molten salt, the molten salt in the low-temperature zone exchanges heat with the heat exchange tube. As the heat is transferred, the temperature of the molten salt drops and the density increases, causing it to flow to the bottom of the molten salt tank. At the same time, the molten salt in the high-temperature zone naturally flows upward to the top of the molten salt tank due to its higher temperature and lower density, and enters the low-temperature zone from the opening above the high-temperature zone, forming a natural circulation of molten salt inside the molten salt tank. This design helps to achieve efficient utilization and conversion of the molten salt's thermal energy.

[0004] Although the above-mentioned existing molten salt energy storage technology has made significant progress, there are still some technical problems that need to be solved urgently, mainly including: during the heat release process, the molten salt flows to the bottom of the molten salt tank due to the increase in density caused by the decrease in temperature, which makes the molten salt with low temperature contact with the heat exchange tube for a longer time. In the initial heat release stage of the molten salt in the molten salt tank, this contact mode may cause the water in the heat exchange tube to be heated into steam at a slower rate, affecting the efficiency of energy conversion; in addition, the molten salt after heat exchange is prone to solidification, which not only affects the natural circulation flow of the molten salt, but may also have an adverse effect on the normal operation of the molten salt energy storage system. In summary, how to improve the design of the molten salt energy storage system to improve the energy conversion efficiency and prevent the molten salt from solidifying has become a technical problem that needs to be solved urgently in the current field of molten salt energy storage technology. Summary of the Invention

[0005] The object of the present invention is to provide a molten salt heat storage tank evaporator and its working method to solve one or more of the above-mentioned technical problems. In the technical solution disclosed by the present invention, a communication structure between the low-temperature zone and the high-temperature zone is designed, combined with a stirring component and an active conveying component, which can improve the speed of heating water into steam, improve the energy conversion efficiency of the molten salt in the high-temperature zone, and prevent the solidification of the molten salt in the low-temperature zone.

[0006] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a molten salt heat storage tank evaporator, including: a molten salt tank and a driving component arranged on the molten salt tank; wherein, The molten salt tank is provided with a low-temperature zone, a high-temperature zone and an exhaust pipe communicated with the low-temperature zone or the high-temperature zone; wherein, the top of the high-temperature zone is communicated with the top of the low-temperature zone through a diversion channel, and the bottom of the high-temperature zone is communicated with the bottom of the low-temperature zone; a heat exchange tube is installed in the low-temperature zone through a mounting frame, and a stirring component for stirring the molten salt is rotatably arranged in the low-temperature zone; an active conveying component is arranged in the high-temperature zone, and the active conveying component is used to convey the molten salt at the top of the high-temperature zone to the top of the low-temperature zone through the diversion channel; an electric heater is installed in the high-temperature zone. The driving component is used to drive the stirring component and the active conveying component.

[0007] In a further improvement of the technical solution of the present invention, in the molten salt tank, the high-temperature zone is sleeved outside or inside the low-temperature zone.

[0008] In a further improvement of the technical solution of the present invention, the active conveying component includes: a conveying cylinder, a first rotating shaft and an impeller; wherein, The conveying cylinder is installed in the high-temperature zone, the conveying cylinder is provided with a flow inlet, and the conveying cylinder is communicated with the diversion channel; the first rotating shaft is rotatably arranged in the conveying cylinder, and the impeller is installed on the first rotating shaft. Wherein, the first rotating shaft can drive the impeller to rotate under the drive of the driving component, so that the molten salt in the high-temperature zone flows into the conveying cylinder through the flow inlet and is conveyed into the diversion channel.

[0009] In a further improvement of the technical solution of the present invention, the stirring component includes: a second rotating shaft and a stirring rod; wherein, The second rotating shaft is rotatably arranged in the low-temperature zone, and the stirring rod is installed on the second rotating shaft. Wherein, the second rotating shaft can drive the stirring rod to rotate and stir the molten salt in the low-temperature zone under the drive of the driving component.

[0010] Further improvement of the technical solution of the present invention lies in that, in the low-temperature area, the number of the mounting frames is multiple, the heat exchange tubes are arranged in the mounting frames, and a stirring rod is arranged between two adjacent mounting frames.

[0011] Further improvement of the technical solution of the present invention lies in that the driving assembly includes: a transmission box, and a motor and a transmission assembly arranged in the transmission box; Wherein, the driving end of the motor is respectively connected with the first rotating shaft and the second rotating shaft through the transmission assembly.

[0012] Further improvement of the technical solution of the present invention lies in that the transmission assembly includes: a first gear and a second gear; Wherein, the first gear is mounted on the first rotating shaft, the second gear is mounted on the second rotating shaft, the first gear meshes with the second gear, and the second gear is connected with the driving end of the motor.

[0013] Further improvement of the technical solution of the present invention lies in that a liquid level gauge is further arranged in the high-temperature area of the molten salt tank.

[0014] Further improvement of the technical solution of the present invention lies in that it further includes: A controller, configured to obtain the measurement data of the liquid level gauge and control the rotation speed of the motor according to the measurement data.

[0015] The present invention provides a working method of a molten salt heat storage tank evaporator, including: During the valley electricity period, the molten salt in the high-temperature area of the molten salt tank is heated by an electric heater; during the peak electricity period, the heat in the molten salt tank is used to heat the water in the heat exchange tubes arranged in the low-temperature area to generate steam and transport it to the user end; wherein, the molten salt in the high-temperature area is transported to the low-temperature area through a diversion channel by an active transportation component, so that the heat exchange tubes can contact and exchange heat with the molten salt in the high-temperature area as early as possible; during the heat exchange process, the molten salt in the low-temperature area is stirred by a stirring component.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a molten salt thermal energy storage tank evaporator, which designs a communication structure between a low-temperature zone and a high-temperature zone, and designs a stirring component and an active conveying component, capable of improving the speed of heating water into steam, enhancing the energy conversion efficiency of the molten salt in the high-temperature zone, and preventing the solidification of the molten salt in the low-temperature zone. Specifically and explanatorily, by clearly dividing the low-temperature zone and the high-temperature zone, effective management and conversion of the thermal energy of the molten salt are achieved; among them, the high-temperature zone is used to store high-temperature molten salt, and the low-temperature zone is used for heat exchange with the heat exchange tubes. The top of the high-temperature zone is connected to the top of the low-temperature zone through a diversion channel, enabling the high-temperature molten salt to flow directionally to the low-temperature zone, improving the efficiency of heat transfer; the exhaust pipe is used to discharge the gas in the molten salt tank to ensure the stability of the system operation. A stirring component is arranged in the low-temperature zone, and the molten salt is stirred by a stirring rod, increasing the contact area and contact frequency between the molten salt and the heat exchange tubes, improving the heat exchange efficiency, enabling the water in the heat exchange tubes to be heated into steam more quickly, and also preventing the solidification of the molten salt to a certain extent. The active conveying component is used to convey the molten salt at the top of the high-temperature zone to the top of the low-temperature zone through the diversion channel. This design ensures that the high-temperature molten salt can quickly enter the low-temperature zone and conduct efficient heat exchange with the heat exchange tubes, solves the problem in the prior art that the molten salt with a relatively low temperature has a long contact time with the heat exchange tubes, and improves the energy conversion efficiency of the molten salt in the high-temperature zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art; obviously, the drawings in the following description are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 FIG. is a schematic structural diagram of a molten salt thermal energy storage tank evaporator in an embodiment of the present invention; Figure 2 FIG. is a plan view of a mounting frame and heat exchange tubes in a molten salt thermal energy storage tank evaporator in an embodiment of the present invention; Figure 3 FIG. is a schematic structural diagram inside a transmission box in a molten salt thermal energy storage tank evaporator in an embodiment of the present invention; Figures 1 to 3 The explanations of the reference numerals in the figures are as follows: 1, molten salt tank; 2, low-temperature zone; 3, high-temperature zone; 4, electric heater; 5, conveying cylinder; 6, diversion channel; 7, inlet; 8, first rotating shaft; 9, impeller; 10, mounting frame; 11, heat exchange tube; 12, second rotating shaft; 13, stirring rod; 14, transmission box; 15, first gear; 16, second gear; 17, motor; 18, exhaust pipe; 19, liquid level gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments of the technical solutions are part of the embodiments of the present invention, not all of the embodiments.

[0020] Based on the technical solutions disclosed in the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] Please refer to Figures 1 to 3 , a molten salt thermal energy storage tank evaporator disclosed in an embodiment of the present invention, comprising: A molten salt tank 1, a low-temperature area 2 is provided in the middle of the molten salt tank 1, and a plurality of mounting frames 10 are installed in the low-temperature area 2, and heat exchange tubes 11 are installed in each mounting frame 10; a plurality of annularly distributed high-temperature areas 3 are provided outside the low-temperature area 2 in the molten salt tank, and electric heaters 4 are installed in the high-temperature areas 3; the bottom of the high-temperature area 3 is communicated with the bottom of the low-temperature area 2, and the top of the high-temperature area 3 is communicated with the top of the low-temperature area 2 through a diversion channel 6; an exhaust pipe 18 communicating with the inside of the molten salt tank 1 is installed at the top of the molten salt tank 1, and a transmission box 14 is installed at the bottom of the molten salt tank 1; A main conveying assembly, which is arranged in the high-temperature area 3 and is used for conveying the high-temperature molten salt in the high-temperature area 3 to the low-temperature area 2 through the diversion channel 6 to contact the heat exchange tubes 11; A stirring assembly, which is arranged in the low-temperature area 2 and is used for stirring the molten salt in the low-temperature area 2; A driving assembly, which is arranged in the transmission box 14 and is used for driving the main conveying assembly and the stirring assembly.

[0022] In one case of the embodiment of the present invention, the main conveying assembly includes a conveying cylinder 5 installed in the high-temperature area 3 and communicated with the diversion channel 6, a flow inlet 7 is provided on one side of the conveying cylinder 5, and a first rotating shaft 8 penetrating into the transmission box 14 is rotatably arranged in the conveying cylinder 5, and an impeller 9 is installed at one end of the first rotating shaft 8 located in the conveying cylinder 5.

[0023] In an embodiment of the present invention, during the process of molten salt heat release, the first rotating shaft 8 is driven to rotate by the driving assembly, so that the impeller 9 rotates, so that the molten salt in the high-temperature zone 3 entering from the inlet 7 can flow from the guide channel 6 into the low-temperature zone 2 under the action of the impeller 9, so that during the initial heat release of the molten salt in the molten salt tank 1, the water in the heat exchange tube 11 can be quickly heated into steam for use, thereby avoiding long-term contact between the low-temperature molten salt and the heat exchange tube 11 to affect the steam generation rate.

[0024] In one embodiment of the present invention, the stirring assembly includes a second rotating shaft 12 rotatably arranged on a transmission box 14 , the second rotating shaft 12 is located in the low temperature zone 2 , and a stirring rod 13 is installed on the rotating shaft, and the stirring rod 13 is located between adjacent mounting frames 10 .

[0025] In the embodiment of the present invention, the second rotating shaft 12 rotates under the action of the driving assembly, which drives the stirring rod 13 to stir the molten salt in the low-temperature zone 2, so that the molten salt in the low-temperature zone 2 is in full contact with the heat exchange tube 11, while also preventing the low-temperature molten salt from solidifying and affecting the circulation flow of the molten salt.

[0026] In one embodiment of the present invention, the drive assembly includes a first gear 15 installed at the bottom of the first rotating shaft 8, a second gear 16 meshing with several first gears 15 is installed at the bottom of the second rotating shaft 12, and a motor 17 connected to the second gear 16 is installed in the transmission box 14.

[0027] In the embodiment of the present invention, the motor 17 is started by an external controller, and the first rotating shaft 8 and the second rotating shaft 12 are driven to rotate by the meshing first gear 15 and the second gear 16, thereby simultaneously driving the first rotating shaft 8 and the second rotating shaft 12 by a single driving source.

[0028] In one embodiment of the present invention, a liquid level meter 19 is provided on the molten salt tank for detecting the liquid level of the molten salt in the molten salt tank 1. Furthermore, the start and stop and operating speed of the motor can be controlled according to the detected liquid level.

[0029] The following are additional explanations of the design concept of the technical solution of the embodiment of the present invention: A low-temperature zone and a high-temperature zone are set up. The high-temperature zone is used to store high-temperature molten salt, and the low-temperature zone is used to exchange heat with the heat exchange tube. Among them, by clearly dividing the low-temperature zone and the high-temperature zone, the effective management and conversion of the molten salt thermal energy is achieved.

[0030] A guide channel is provided; wherein, the top of the high-temperature zone is connected to the top of the low-temperature zone through the guide channel, so that the high-temperature molten salt can flow in a direction to the low-temperature zone, thereby improving the efficiency of heat energy transfer.

[0031] An exhaust pipe is provided; wherein, the exhaust pipe is used to exhaust the gas in the molten salt tank to ensure the stability of the system operation.

[0032] A stirring component is provided; wherein, the stirring component is arranged in the low-temperature area, and the molten salt is stirred by the stirring rod, which increases the contact area and contact frequency between the molten salt and the heat exchange tube, improves the heat exchange efficiency, enables the water in the heat exchange tube to be heated into steam faster, and also prevents the molten salt from solidifying.

[0033] A main conveying component is provided; wherein, the main conveying component (including a conveying cylinder, a first rotating shaft and an impeller) is used to convey the molten salt at the top of the high-temperature area to the top of the low-temperature area through a diversion channel. This technical means ensures that the high-temperature molten salt can quickly enter the low-temperature area and perform efficient heat exchange with the heat exchange tube, solving the problem that the molten salt with a relatively low temperature in the prior art has a long contact time with the heat exchange tube.

[0034] An electric heater is provided; wherein, the electric heater is installed in the high-temperature area and is used to heat the molten salt to the required high-temperature state using valley electricity to store heat energy.

[0035] A driving component is provided; wherein, the driving component (including a transmission box, a motor and a transmission component) is used to drive the stirring component and the main conveying component. Through the rotation of the motor, the transmission component (such as a first gear and a second gear) is driven to rotate, and then the stirring rod and the impeller are driven to rotate, realizing the stirring and main conveying of the molten salt.

[0036] An installation frame and a heat exchange tube are provided; wherein, a plurality of installation frames are arranged in the low-temperature area, and the heat exchange tube is installed in the installation frame. This technical means enables the heat exchange tubes to be evenly distributed, improving the uniformity and efficiency of heat exchange.

[0037] A liquid level gauge and a controller are provided; wherein, the liquid level gauge is used to measure the liquid level of the molten salt in the high-temperature area, and the controller controls the rotation speed of the motor according to the measurement data of the liquid level gauge. This design means can realize the real-time monitoring and adjustment of the molten salt liquid level, ensuring the stable operation of the system and efficient heat energy conversion.

[0038] In the technical solution provided by the embodiment of the present invention, during off-peak electricity hours, the molten salt in the molten salt tank 1 is heated by the electric heater 4. During peak electricity hours, the heat in the molten salt tank 1 is used to heat the water in the heat exchange tube 11 to generate steam, which is then transported to users for use. When releasing heat, the molten salt in the low-temperature area 2 will first come into contact with the heat exchange tube 11 of the mounting rack 10, thereby heating the water transported into the heat exchange tube 11 into steam and outputting the steam for use. And the molten salt in the high-temperature area 3 is transported to the low-temperature area 2 through the diversion channel 6 by the active conveying component, so that the heat exchange tube 11 can continuously come into contact with the transported high-temperature molten salt. Thus, during the initial heat release process of the molten salt in the molten salt tank 1, the water in the heat exchange tube 11 can be quickly heated into steam for use, avoiding the influence of the low-temperature molten salt on the steam generation speed due to long-term contact with the heat exchange tube 11. And the stirring component stirs the low-temperature molten salt in the low-temperature area 2 to prevent the molten salt from solidifying due to low temperature and maintain the fluidity of the molten salt, so that the low-temperature molten salt can flow into the bottom of the high-temperature area 3. At the same time, the high-temperature molten salt is located above the high-temperature area 3 because its density is lower than that of the low-temperature molten salt, enabling the active conveying component to continuously transport the molten salt in the high-temperature area 3 to the low-temperature area 2, thereby realizing the cyclic transportation of the molten salt in the high-temperature area 3 and the low-temperature area 2. When the molten salt starts to release heat, the heat exchange tube 11 can be evenly contacted with the high-temperature molten salt, so as to quickly generate steam for use. As the temperature of the molten salt in the molten salt tank decreases, the speed of generating steam by heating the water in the heat exchange tube 11 also gradually decreases.

[0039] In the technical solution of the embodiment of the present invention, during off-peak electricity hours, the molten salt is heated by an electric heater to store thermal energy. During peak electricity hours, the stored thermal energy is used to heat the water in the heat exchange tube to generate steam and transport it to the user side. The high-temperature molten salt is transported to the low-temperature area by the active conveying component, and the molten salt is stirred by combining with the stirring component, improving the heat exchange efficiency and the steam generation speed, effectively solving the problems existing in the prior art, and improving the thermal energy conversion efficiency and stability of the molten salt energy storage system.

[0040] In summary, the embodiment of the present invention discloses a molten salt heat storage tank evaporator, including a molten salt tank. A low-temperature area is provided in the middle of the molten salt tank. A mounting rack is installed in the low-temperature area, and a heat exchange tube is installed in the mounting rack. A plurality of annularly distributed high-temperature areas are provided outside the low-temperature area in the molten salt tank. An electric heater is installed in the high-temperature area. The bottom of the high-temperature area is communicated with the bottom of the low-temperature area, and the top of the high-temperature area is communicated with the top of the low-temperature area through a diversion channel. An exhaust pipe communicated with the inside of the molten salt tank is installed at the top of the molten salt tank, and a transmission box is installed at the bottom of the molten salt tank. The present invention realizes the cyclic transportation of the molten salt in the high-temperature area and the low-temperature area, so that when the molten salt starts to release heat, the heat exchange tube can be evenly contacted with the high-temperature molten salt, thereby quickly generating steam for use.

[0041] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A molten salt thermal energy storage tank evaporator, characterized in that, Comprising: A molten salt tank (1) and a driving assembly arranged on the molten salt tank (1); wherein, The molten salt tank (1) is provided with a low-temperature zone (2), a high-temperature zone (3), and an exhaust pipe (18) communicating with the low-temperature zone (2) or the high-temperature zone (3); wherein, the top of the high-temperature zone (3) is connected to the top of the low-temperature zone (2) through a diversion channel (6), and the bottom of the high-temperature zone (3) is connected to the bottom of the low-temperature zone (2); a heat exchange tube (11) is arranged in the low-temperature zone (2) through a mounting frame (10), and a stirring assembly for stirring the molten salt is rotatably arranged in the low-temperature zone (2); an active conveying assembly is arranged in the high-temperature zone (3), and the active conveying assembly is used to convey the molten salt at the top of the high-temperature zone (3) to the top of the low-temperature zone (2) through the diversion channel (6); an electric heater (4) is installed in the high-temperature zone (3); The driving assembly is used to drive the stirring assembly and the active conveying assembly.

2. The evaporator of a molten salt heat storage tank according to claim 1, characterized in that In the molten salt tank (1), the high-temperature zone (3) is sleeved outside or inside the low-temperature zone (2).

3. The evaporator of a molten salt heat storage tank according to claim 1, characterized in that The active conveying assembly includes: a conveying cylinder (5), a first rotating shaft (8), and an impeller (9); wherein, The conveying cylinder (5) is installed in the high-temperature zone (3), the conveying cylinder (5) is provided with a flow inlet (7), and the conveying cylinder (5) is connected to the diversion channel (6); the first rotating shaft (8) is rotatably arranged in the conveying cylinder (5), and the impeller (9) is installed on the first rotating shaft (8); Wherein, the first rotating shaft (8) can drive the impeller (9) to rotate under the drive of the driving assembly, so that the molten salt in the high-temperature zone (3) flows into the conveying cylinder (5) through the flow inlet (7) and is conveyed into the diversion channel (6).

4. The evaporator of a molten salt heat storage tank according to claim 3, characterized in that The stirring assembly includes: a second rotating shaft (12) and a stirring rod (13); wherein, The second rotating shaft (12) is rotatably arranged in the low-temperature zone (2), and the stirring rod (13) is installed on the second rotating shaft (12); Wherein, the second rotating shaft (12) can drive the stirring rod (13) to rotate and stir the molten salt in the low-temperature zone (2) under the drive of the driving assembly.

5. A molten salt thermal energy storage tank evaporator according to claim 4, characterized in that, In the low-temperature zone (2), the number of the mounting frames (10) is multiple, the heat exchange tubes (11) are arranged in the mounting frames (10), and the stirring rods (13) are arranged between two adjacent mounting frames (10).

6. The evaporator of a molten salt heat storage tank according to claim 4, characterized in that, The driving assembly includes: a transmission box (14) and a motor (17) and a transmission component arranged in the transmission box (14); Wherein, the driving end of the motor (17) is connected to the first rotating shaft (8) and the second rotating shaft (12) respectively through the transmission component.

7. The evaporator of a molten salt heat storage tank according to claim 6, wherein, The transmission component includes: a first gear (15) and a second gear (16); Wherein, the first gear (15) is mounted on the first rotating shaft (8), the second gear (16) is mounted on the second rotating shaft (12), the first gear (15) meshes with the second gear (16), and the second gear (16) is connected to the driving end of the motor (17).

8. A molten salt thermal energy storage tank evaporator according to claim 6, wherein a liquid level gauge (19) is further provided in the high temperature zone (3) of the molten salt tank (1).

9. The evaporator of a molten salt heat storage tank according to claim 8, characterized in that, It further includes: a controller for acquiring the measurement data of the liquid level gauge (19) and controlling the rotation speed of the motor (17) according to the measurement data.

10. A working method of the molten salt thermal energy storage tank evaporator according to claim 1, characterized in that, It includes: During the valley electricity period, the molten salt in the high temperature zone (3) of the molten salt tank (1) is heated by the electric heater (4); During the peak electricity period, the heat in the molten salt tank (1) is used to heat the water in the heat exchange tube (11) provided in the low temperature zone (2) to generate steam and transport it to the user end; wherein, the molten salt in the high temperature zone (3) is transported to the low temperature zone (2) through the diversion channel (6) by the active conveying component, so that the heat exchange tube (11) can contact and exchange heat with the molten salt in the high temperature zone (3) as early as possible; during the heat exchange process, the molten salt in the low temperature zone (2) is stirred by the stirring component.

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