Fused salt tank, fused salt energy storage heat exchange device and cleaning method of fused salt tank

Abstract

The application relates to the technical field of molten salt storage, and discloses a molten salt tank, a molten salt energy storage heat exchange device and a cleaning method of the molten salt tank. The molten salt tank comprises a tank body, a cleaning assembly and a detection assembly, the bottom of the tank body is provided with a base, the base can move along the axial direction of the tank body; the cleaning assembly comprises a plurality of cleaning pieces, the cleaning piece comprises a scraper and a first driving piece, and the first driving piece can drive the scraper to move along the radial direction of the tank body; the detection assembly comprises a plurality of detection pieces, the detection end of the detection piece can be retracted when the scraper extends to the edge of the base, and the detection end of the detection piece can extend when the scraper is retracted to the edge of the base. The molten salt tank provided by the application can realize self-cleaning and detection of the molten salt tank, can avoid long-time contact of molten salt with the inner wall of the tank body, can reduce the probability of corrosion of the tank body by the molten salt, can increase the service life of the molten salt tank, can reflect the corrosion condition of the tank body, can facilitate timely replacement or repair of the tank body by workers, and can avoid safety accidents caused by tank body rupture.

Description

Technical Field

[0001] This invention relates to the field of molten salt storage technology, specifically to a molten salt tank, a molten salt energy storage heat exchange device, and a cleaning method for the molten salt tank. Background Technology

[0002] Molten salt, as a medium- and high-temperature heat transfer and storage medium, has advantages over conventional high-temperature heat transfer fluids, including lower saturated vapor pressure, superior high-temperature stability, low viscosity, and high specific heat capacity. Therefore, molten salt thermal storage systems have advantages such as wide applicability, environmental friendliness, safety, and stability, making them the preferred technology for large-scale, long-term medium- and high-temperature thermal storage.

[0003] Molten salt is stored in molten salt tanks, but most current molten salt tanks only have the function of storing molten salt. After the molten salt is discharged from the molten salt tank, some molten salt still adheres to the wall, causing the high-temperature molten salt to be in contact with the inner wall of the tank for a long time, which increases the probability of the tank being corroded and affects the service life of the tank. Moreover, since the corrosion of the tank is usually impossible to detect, it can easily lead to the tank breaking and cause safety accidents. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a molten salt tank, a molten salt energy storage heat exchange device, and a cleaning method for the molten salt tank.

[0005] This invention provides a molten salt vessel, comprising: The tank body has a base at the bottom, and the base is movable along the axial direction of the tank body. The cleaning assembly includes a plurality of cleaning components spaced apart along the circumferential direction of the tank. Each cleaning component includes a scraper disposed on the base and a first driving component. The first driving component can drive the scraper to move along the radial direction of the tank so that the scraper can extend or retract to the edge of the base. The detection assembly includes a plurality of detection elements disposed on the base. The detection end of the detection element is retractable to the edge of the base when the scraper extends out of the edge of the base, and is also retractable to the edge of the base when the scraper retracts out of the edge of the base. The detection end of the detection element is capable of detecting the smoothness of the inner wall of the tank when it contacts the inner wall of the tank.

[0006] Optionally, the molten salt tank further includes a positioning element, which includes a plurality of limiting posts extending radially along the tank body and disposed on the base. The limiting posts are capable of extending out of or retracting from the edge of the base along the radial direction of the tank body, and the tank body is provided with limiting holes at positions corresponding to the limiting posts.

[0007] Optionally, the tank body is provided with a plurality of receiving slots, each of which corresponds to a limiting post. A first elastic element is provided in each receiving slot, extending along the radial direction of the tank body. One end of the limiting post is connected to the first elastic element, and the first elastic element applies a spring force to the limiting post in the direction toward the tank body. The output end of the first driving member is connected to the limiting post through a first pull rope, so that when the output end of the first driving member moves toward the tank body, the limiting post can be moved away from the tank body by the first pull rope.

[0008] Optionally, the molten salt tank further includes a sampling component, which includes multiple sampling tubes disposed on the outer periphery of the tank body. The sampling ports of the sampling tubes extend into the interior of the tank body. The base is provided with a sampling groove. When the scraper extends out of the edge of the base, the scraper can cover the sampling groove. When the scraper retracts to the edge of the base, the end of the sampling groove near the inner wall of the tank body is not covered by the scraper. And when the base moves to the top of the tank body, the sampling port and the sampling groove are positioned opposite each other.

[0009] Optionally, the first driving member includes a first telescopic rod disposed in the sampling groove, the end of the first telescopic rod is provided with a first slider, the scraper is connected to the first slider, and the cross-sectional shape of the first slider matches the cross-sectional shape of the sampling groove.

[0010] Optionally, the detection element includes: An mounting block is disposed between two adjacent scrapers. The mounting block has grooves on both sides. A second slider is slidably disposed in the grooves along the moving direction of the scraper. The second slider is connected to the scraper. The mounting block has a receiving hole. An outer sleeve is disposed within the receiving hole. The outer sleeve is connected to the second slider via a second pull rope. When the second slider moves toward the tank, the outer sleeve moves away from the tank. A measuring roller is rotatably disposed at one end of the outer sleeve facing the tank body, and the measuring roller extends along the axial direction of the tank body; An inner sleeve is disposed within the receiving hole and fixedly connected to the mounting block. A pressure sensor is provided inside the inner sleeve. The end of the outer sleeve away from the measuring roller is sleeved on the open end of the inner sleeve, and a second elastic element is provided between the outer sleeve and the pressure sensor.

[0011] Optionally, the molten salt tank further includes a second driving member for moving the base along the axial direction of the tank body, the top of the tank body being sealed by a top cover, and the second driving member comprising: A threaded screw is inserted vertically into the tank body; A drive motor, mounted on the top cover, is used to drive the threaded screw to rotate; An adjusting nut is fitted around the outer circumference of the threaded screw. A support plate is disposed at the bottom of the adjusting nut and rotates with the adjusting nut. The base is provided with a support groove that matches the support plate.

[0012] Optionally, the adjusting nut is provided with a plurality of second telescopic rods on its outer periphery. The ends of the second telescopic rods can extend out or retract from the peripheral wall of the adjusting nut. The base is provided with a socket that communicates with the support groove. The socket can be used to insert the adjusting nut. The inner wall of the socket is provided with a positioning hole at a position corresponding to the second telescopic rod.

[0013] The present invention also provides a molten salt energy storage heat exchange device, including the molten salt tank described in any one of the above.

[0014] The present invention also provides a method for cleaning the above-mentioned molten salt tank, comprising the following steps: Step S1: The first driving component drives the scraper to extend out of the edge of the base until the extended end of the scraper abuts against the inner wall of the tank. During this process, the detection end of the detection component retracts back to the edge of the base. Step S2: The base moves vertically upward and scrapes off the molten salt on the inner wall of the tank through the extended end of the scraper. In step S3, the first driving component drives the scraper to retract to the side of the base. During this process, the detection end of the detection component extends out of the side of the base and contacts the inner wall of the tank. Step S4: The base moves downward and the detection end of the detection piece contacts the inner wall of the tank to detect the smoothness of the inner wall of the tank.

[0015] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art: The molten salt tank provided by this invention can achieve autonomous cleaning and inspection, avoiding prolonged contact between molten salt and the inner wall of the tank, thereby reducing the probability of corrosion by molten salt and increasing the service life of the molten salt tank. It can also autonomously detect the smoothness of the inner wall of the tank through the detection end of the detection component, thereby obtaining the concavity or convexity of the inner wall of the tank to reflect the corrosion status of the tank, which facilitates timely replacement or repair of the tank by the staff and avoids safety accidents caused by tank rupture. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the molten salt tank according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the configuration of the second driving component according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the base according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the base according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the configuration of the first driving component according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the sampling tank and the receiving tank according to an embodiment of the present invention; Figure 7 This is a structural schematic diagram of the connection method between the first driving member and the limiting post according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the detection element according to an embodiment of the present invention; Figure 9 This is an exploded view of the detection element described in one of the embodiments of the present invention; Figure 10 This is a schematic diagram of the molten salt energy storage heat exchange device according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures 1. Tank body; 11. Limiting hole; 2. Base; 21. Receiving groove; 211. First elastic element; 212. First pull rope; 213. Limiting block; 22. Sampling groove; 23. Support groove; 24. Insertion hole; 241. Positioning hole; 25. Connecting groove; 26. Receiving plate; 261. Clearance hole; 262. Receiving cavity; 3. Cleaning assembly; 31. Cleaning component; 311. Scraper; 3111. Limiting plate; 312. First driving component; 3121. First telescopic rod; 3122. First slider; 4. Detection assembly; 41. Detection component; 411. Mounting block; 4111. Slide groove; 4112. Second slider; 4113. Receiving hole; 4114. Outer sleeve; 4115. Second pull rope; 4116. Measuring roller; 4117. Inner sleeve; 4118. Pressure sensor; 4119. Second elastic element; 5. Positioning element; 51. Limiting post; 6. Sampling element; 61. Sampling tube; 62. Sampling port; 7. Second driving element; 71. Threaded screw; 72. Drive motor; 721. Motor frame; 73. Adjusting nut; 731. Second telescopic rod; 74. Support plate; 8. Top cover; 9. High-temperature molten salt tank; 91. Low-temperature molten salt tank; 92. Molten salt electric heater; 93. Steam generator; 94. Heat exchanger; 95. Water tank; 96. Heat supply pipeline; 97. Recovery pipeline. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other.

[0021] The following description sets forth many specific details in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments described in the specification are only some, not all, of the embodiments of the invention.

[0022] Combination Figure 1 and Figure 2 As shown, the molten salt tank provided in this embodiment of the invention includes a tank body 1, a cleaning component 3, and a detection component 4.

[0023] The bottom of the tank body 1 is provided with a base 2, which can move along the axial direction of the tank body 1. Specifically, the interior of the tank body 1 forms a cavity for holding molten salt, and the base 2 serves to support the molten salt. To prevent the molten salt from flowing out through the gap between the base 2 and the tank body 1 and thus being wasted, a rotating sealing ring can be provided on the outer periphery of the base 2.

[0024] The cleaning assembly 3 includes a plurality of cleaning components 31 spaced apart along the circumferential direction of the tank body 1. Each cleaning component 31 includes a scraper 311 mounted on a base 2 and a first driving component 312. The first driving component 312 can drive the scraper 311 to move radially along the tank body 1, allowing the scraper 311 to extend or retract from the edge of the base 2. When the first driving component 312 causes the scraper 311 to extend beyond the edge of the base 2, the scraper 311 can be supported on the inner wall of the tank body 1. The vertical movement of the base 2 allows the scraper 311 to scrape the high-temperature molten salt from the inner wall of the tank body 1 onto the base 2, fulfilling the cleaning requirements of the tank body 1 and preventing prolonged contact between the molten salt and the inner wall of the tank body 1, thereby reducing the probability of corrosion by the molten salt. Furthermore, when cleaning of the inner wall of the tank body 1 is not required, the first driving component 312 can drive the scraper 311 to move away from the inner wall of the tank body 1, causing the end of the scraper 311 to retract back to the edge of the base 2.

[0025] The detection assembly 4 includes multiple detection elements 41 mounted on the base 2. The detection end of each detection element 41 can retract to the edge of the base 2 when the scraper 311 extends beyond it. This ensures that the detection end of the detection element 41 is in a retracted state while the scraper 311 is scraping away the molten salt on the inner wall of the tank 1, preventing damage to the detection element 41 due to contact between the high-temperature molten salt and the detection end. This increases the service life and detection accuracy of the detection element 41. The detection end of each detection element 41 can also extend beyond the edge of the base 2 when the scraper 311 retracts. That is, after the scraper 311 has finished its work, the detection end of the detection element 41 extends beyond the edge of the base 2, allowing it to contact the inner wall of the tank 1. When in contact with the inner wall of the tank 1, the detection end of the detection element 41 can detect the smoothness of the inner wall, thus providing feedback on the degree of corrosion of the tank 1.

[0026] In this design, the detection component 41 and the scraper 311 are linked, so the cleaning and detection functions of the tank 1 can be realized by only one first driving component 312, making the structure more compact and reducing material costs. In addition, the detection and cleaning of the tank 1 do not affect each other, thus meeting the detection and cleaning needs of the tank 1.

[0027] The molten salt tank provided by this invention can achieve autonomous cleaning and inspection of the molten salt tank, avoid prolonged contact between molten salt and the inner wall of the tank 1, thereby reducing the probability of corrosion of the tank 1 by molten salt and increasing the service life of the molten salt tank. It can also autonomously detect the smoothness of the inner wall of the tank 1 through the detection end of the detection component 41, thereby obtaining the concavity or convexity of the inner wall of the tank 1 to reflect the corrosion status of the tank 1, which facilitates timely replacement or repair of the tank 1 by the staff and avoids safety accidents caused by the rupture of the tank 1.

[0028] In some implementations, such as Figure 2As shown, the molten salt tank also includes a positioning component 5, which includes multiple limiting posts 51 extending radially along the tank body 1 and disposed on the base 2. The limiting posts 51 can extend out of or retract into the edge of the base 2 along the radial direction of the tank body 1. The tank body 1 is provided with limiting holes 11 at positions corresponding to the limiting posts 51, and the limiting holes 11 correspond one-to-one with the limiting posts 51, so that each limiting post 51 can be inserted into a limiting hole 11. In order to increase the convenience of inserting the limiting posts 51 into the limiting holes 11, the ends of the limiting posts 51 can be set in an arc shape.

[0029] In this design, by setting the positioning component 5, the base 2 can be installed on the tank 1, preventing the base 2 from detaching from the tank 1 under the weight of the molten salt, thus ensuring the support effect of the molten salt and the usability of the tank 1. Furthermore, when the base 2 needs to move upwards, the limiting post 51 retracts into the base 2, disengaging from the limiting hole 11, facilitating the movement of the base 2. When the base 2 needs to provide support, the limiting post 51 inserts into the corresponding limiting hole 11, ensuring the connection effect of the base 2.

[0030] In some implementations, such as Figure 4 As shown, the tank body 1 is provided with multiple receiving slots 21, which extend radially along the tank body. Each receiving slot 21 corresponds to a limiting post 51, ensuring that each receiving slot 21 can accommodate one limiting post 51. A first elastic element 211 is provided within each receiving slot 21, extending radially along the tank body 1. One end of the limiting post 51 is connected to the first elastic element 211, and the end of the first elastic element 211 away from the limiting post 51 is connected to the inner wall of the receiving slot 21 via a limiting block 213. The first elastic element 211 applies a spring force towards the limiting post 51 in the direction of the tank body 1. Under normal conditions, the limiting post 51 can extend out of the base 2 and into the limiting hole 11 under the elastic force of the first elastic element 211. Figure 7 As shown, the output end of the first driving member 312 is connected to the limiting post 51 by a first pull rope 212, so that when the output end of the first driving member 312 moves toward the tank 1, the limiting post 51 can be moved away from the tank 1 by the first pull rope 212. The first elastic member 211 is preferably a spring.

[0031] In this design, when the output end of the first driving member 312 extends to drive the scraper 311 out of the edge of the base 2, the output end of the first driving member 312 drives the limiting post 51 to move away from the tank 1 via the first pull rope 212, so that the end of the limiting post 51 disengages from the limiting hole 11, allowing the base 2 to move vertically. The rise of the base 2 then allows the scraper 311 to clean the molten salt from the inner wall of the tank 1. After the molten salt is cleaned and the base 2 returns to its original position, the limiting member of the base 2 is aligned with the limiting hole 11. At this time, as the output end of the first driving member 312 retracts, the pulling force acting on the limiting post 51 disappears, and the limiting post 51 extends out of the edge of the base 2 under the elastic force of the first elastic member 211 to insert into the corresponding insertion hole 24. This design is ingenious. The extension and retraction of the scraper 311 can be achieved by the first driving component 312, and the retraction and extension of the limiting post 51 can be achieved by the first elastic component 211, thus reducing material costs.

[0032] In some implementations, in order to ensure that the limiting post 51 and the limiting hole 11 are in relative positions after the base 2 is reset, a base plate can be provided below the base 2 to limit the position of the base 2 in the vertical direction.

[0033] In some implementations, combined Figure 1 and Figure 2 As shown, the molten salt tank also includes a sampling component 6, which includes multiple sampling tubes 61 arranged on the outer periphery of the tank body 1. The sampling port 62 of the sampling tube 61 extends into the interior of the tank body 1. The base 2 is provided with a sampling groove 22. When the scraper 311 extends out of the edge of the base 2, the scraper 311 can cover the sampling groove 22. When the scraper 311 retracts to the edge of the base 2, the end of the sampling groove 22 near the inner wall of the tank body 1 is not covered by the scraper 311. When the base 2 moves to the top of the tank body 1, the sampling port 62 and the sampling groove 22 are opposite each other.

[0034] Specifically, the portion of the sampling tube 61 extending out of the tank 1 has space to accommodate the sample, and the sampling tube 61 is equipped with a suction pump, so that when the sampling tube 61 is connected to the sampling trough 22, the suction pump is used to remove the sample from the sampling trough 22. When the scraper 311 retracts to the side of the base 2, the end of the sampling trough 22 near the inner wall of the tank 1 is not covered by the scraper 311, and the molten salt can enter the sampling trough 22, so that the sampling trough 22 can preserve the sample. When cleaning is performed, the scraper 311 extends out of the side of the base 2, and the scraper 311 can cover the sampling trough 22 to prevent the scraped salt from re-entering the sampling trough 22 and affecting the sample quality. When the base 2 moves upward, it drives the scraper 311 to scrape off the molten salt on the inner wall of the tank 1. After the cleaning of the inner wall of the tank 1 is completed, the base 2 is located above the tank 1, and the sampling port 62 of the sampling tube 61 is opposite to the sampling groove 22 on the base 2. The sample in the sampling groove 22 can be sucked into the sampling tube 61 by the suction pump, which makes it convenient for the operator to analyze the thermophysical parameters of the molten salt in real time, compare them with the standard parameters measured in the laboratory, and find problems in time.

[0035] In some implementations, such as Figure 5 As shown, the first driving component 312 includes a first telescopic rod 3121 disposed within the sampling groove 22. A first slider 3122 is provided at the end of the first telescopic rod 3121, and the end of the first telescopic rod 3121 away from the first slider 3122 is connected to the inner wall of the sampling groove 22. A scraper 311 is connected to the first slider 3122, so that the scraper 311 can be moved by the extension and retraction of the first telescopic rod 3121, facilitating operation. Furthermore, the cross-sectional shape of the first slider 3122 matches the cross-sectional shape of the sampling groove 22. The first telescopic rod 3121 can be an electric push rod, capable of extending and retracting along its own length. This is conventional technology in the art, and its structure and working principle are not described in detail here. In addition, both the first telescopic rod 3121 and the aforementioned limiting block 213 are hollow, facilitating the passage and connection of the first extension rod.

[0036] In this design, on the one hand, the sampling slot 22 is used as a sample collection space for sample collection. On the other hand, the sampling slot 22 serves as an installation space for the first telescopic rod 3121 and the first slider 3122, making the overall structure of the base 2 more compact. In addition, the cross-sectional shape of the first slider 3122 matches the cross-sectional shape of the sampling slot 22, allowing the first slider 3122 to divide the sampling slot 22 into two spaces. The first space is located on the side of the first slider 3122 near the inner wall of the tank 1, and the second space is located on the side of the first slider 3122 away from the inner wall of the tank 1. When the scraper 311 retracts to the edge of the base 2, the first space of the sampling slot 22 is not covered by the scraper 311, allowing the molten salt sample to enter the first space. The second space is always covered by the scraper 311, preventing the molten salt from entering the second space. This prevents the molten salt from flowing to the receiving slot 21 through the connecting slot 25 connected to the second space, thus preventing the molten salt from flowing out of the base 2 and avoiding the phenomenon of molten salt waste.

[0037] In some implementations, such as Figure 3 As shown, a receiving plate 26 is provided in the middle of the base 2. The receiving plate 26 is provided with a clearance hole 261 through which the threaded screw 71 can pass. A limiting plate 3111 is also provided on the scraper 311. The receiving plate 26 is provided with a receiving cavity 262 into which the limiting plate 3111 can be inserted. The limiting plate 3111 can move relative to the receiving plate 26 along the direction close to the inner wall of the tank 1 or away from the inner wall of the tank 1 to guide the movement of the scraper 311. In addition, when the scraper 311 extends out of the edge of the base 2, the limiting plate 3111 can cover the top of the sampling groove 22 to prevent it from entering the sampling groove 22.

[0038] In some implementations, such as Figure 6 As shown, multiple receiving slots 21 are formed on the top of the base 2, and multiple sampling slots 22 are formed on the bottom of the base 2, with the receiving slots 21 and sampling slots 22 vertically opposite each other. The receiving slots 21 and sampling slots 22 are connected by a connecting slot 25, allowing both ends of the first pull rope 212 to pass through the connecting slot 25 and extend into the receiving slots 21 and sampling slots 22 respectively. One end of the first pull rope 212 passes through the hollow limiting block 213 and the first elastic element 211 and connects to the limiting post 51. The other end of the first pull rope 212 passes through the hollow first telescopic rod 3121 and connects to the output end of the first telescopic rod 3121, so that when the output end of the first telescopic rod 3121 extends, the first pull rope 212 can drive the limiting post 51 to retract. Specifically, the second space of the sampling slot 22 is connected to the receiving slot 21 by the connecting slot 25 to prevent molten salt from flowing into the receiving slot 21 through the connecting slot 25.

[0039] In some implementations, combined Figure 8and Figure 9 As shown, the detection component 41 includes a mounting block 411, an outer sleeve 4114, a measuring roller 4116, and an inner sleeve 4117.

[0040] like Figure 3 As shown, the mounting block 411 is disposed between two adjacent scrapers 311. The mounting block 411 has sliding grooves 4111 on both sides. The two sliding grooves 4111 are symmetrically arranged with respect to the mounting block 411. A second slider 4112 is slidably disposed in the sliding groove 4111 along the moving direction of the scraper 311. The second slider 4112 is connected to the scraper 311, so that the scraper 311 can be moved by the second slider 4112. The mounting block 411 has a receiving hole 4113. Part of the receiving hole 4113 is formed on the mounting block 411, and the other part of the receiving hole 4113 is formed on the base 2, making the overall structure more compact.

[0041] The outer sleeve 4114 is disposed within the receiving hole 4113, and the axis of the outer sleeve 4114 is parallel to the axis of the receiving hole 4113. The outer sleeve 4114 is movable within the receiving hole 4113 along its axial direction. The outer sleeve 4114 is connected to the second slider 4112 by a second pull rope 4115. When the second slider 4112 moves in the direction toward the tank 1, the second pull rope 4115 causes the outer sleeve 4114 to move in the direction away from the tank 1.

[0042] The measuring roller 4116 is rotatably disposed at one end of the outer sleeve 4114 facing the tank 1. The measuring roller 4116 extends along the axial direction of the tank 1. The measuring roller 4116 can be supported on the inner wall of the tank 1 and can roll on the inner wall of the tank 1.

[0043] The inner sleeve 4117 is disposed within the receiving hole 4113 and fixedly connected to the mounting block 411. A pressure sensor 4118 is located inside the inner sleeve 4117. The end of the outer sleeve 4114 furthest from the measuring roller 4116 is fitted onto the open end of the inner sleeve 4117. A second elastic element 4119 is provided between the outer sleeve 4114 and the pressure sensor 4118, allowing the outer sleeve 4114 to transmit force to the pressure sensor 4118 via the second elastic element 4119. Preferably, the second elastic element 4119 is a spring.

[0044] The working principle of the detection component 41 under this design is as follows: When cleaning the inner wall of the tank 1, the first drive member 312 can drive the scraper 311 to move along the direction towards the inner wall of the tank 1. At this time, the scraper 311 drives the second slider 4112 to move along the direction away from the tank 1. The second slider 4112 will pull the outer sleeve 4114 along the direction away from the tank 1 through the second pull rope 4115. At this time, the second elastic member 4119 is compressed, and the measuring roller 4116 retracts to the side of the base 2.

[0045] After cleaning, the tank 1 is inspected. The first drive member 312 drives the scraper 311 to move along the direction away from the inner wall of the tank 1. At this time, the second elastic member 4119 pushes the outer sleeve 4114 to move towards the tank 1 until the measuring roller 4116 contacts the inner wall of the tank 1. At this time, the pressure sensor 4118 receives a constant pressure.

[0046] During testing, the base 2 can rotate relative to the inner wall of the tank 1 and can move downward relative to the tank 1, that is, the base 2 moves downward in a spiral. When the inner wall of the tank 1 is concave or convex, the distance between the measuring roller 4116 and the pressure sensor 4118 will change. At this time, it indicates that the tank 1 is damaged and needs to be repaired.

[0047] The detection component 41 under this design has a simple structure and can be linked with the scraper 311, saving component costs.

[0048] In some implementations, combined Figure 1 and Figure 2 As shown, the molten salt tank also includes a second drive component 7 for moving the base 2 along the axial direction of the tank body 1. The top of the tank body 1 is sealed by a top cover 8. The second drive component 7 includes a threaded screw 71, a drive motor 72, an adjusting nut 73, and a support plate 74. The drive motor 72 can be a stepper motor.

[0049] A threaded screw 71 extends vertically through the tank body 1, meaning its extension direction is aligned with the axis of the tank body 1. A drive motor 72 is mounted on the top cover 8 to rotate the threaded screw 71. The top cover 8 has a motor bracket 721 on which the drive motor 72 is mounted, ensuring its safety. The top of the threaded screw 71 passes through the top cover 8 for connection to the drive motor 72, and the threaded screw 71 is connected to the top cover 8 via bearings, ensuring smooth rotation of the threaded screw 71.

[0050] An adjusting nut 73 is fitted around the outer circumference of a threaded screw 71, allowing the adjusting nut 73 to engage with the threaded screw 71. As the threaded screw 71 rotates, it drives the adjusting nut 73 to move vertically, while simultaneously rotating itself. A support plate 74 is positioned at the bottom of the adjusting nut 73 and rotatably engages with it, allowing relative rotation between the support plate 74 and the adjusting nut 73. To ensure smooth rotation, the adjusting nut 73 and the support plate 74 are connected by a bearing. In other words, the adjusting nut 73 drives the support plate 74 to move vertically. The base 2 has a support groove 23 that matches the support plate 74, thereby enabling the base 2 to move vertically via the support plate 74.

[0051] In this design, the drive motor 72 is mounted on the top cover 8 of the tank body 1, reducing additional space occupation.

[0052] In some implementations, such as Figure 2 As shown, the outer periphery of the adjusting nut 73 is provided with a plurality of second telescopic rods 731. The ends of the second telescopic rods 731 can extend out or retract from the periphery of the adjusting nut 73. The base 2 is provided with an insertion hole 24 communicating with the support groove 23. The insertion hole 24 allows the adjusting nut 73 to be inserted. The inner wall of the insertion hole 24 is provided with a positioning hole 241 at a position corresponding to the second telescopic rods 731.

[0053] In this design, the support groove 23 is located below the insertion hole 24, and the support plate 74 can be inserted into the support groove 23. Correspondingly, the adjusting nut 73 can be inserted into the insertion hole 24. By setting the second telescopic rod 731 and the positioning hole 241, when it is necessary to drive the base 2 to rotate, the end of the second telescopic rod 731 extends out to insert into the corresponding positioning hole 241. At this time, when the adjusting nut 73 moves vertically under the action of the threaded screw 71, it can drive the base 2 to move vertically through the adjusting nut 73 and the support plate 74. At the same time, the adjusting nut 73 can also drive the base 2 to rotate, so as to measure the smoothness of the inner wall of the tank 1. The second telescopic rod 731 can be an electric push rod that can extend and retract along its own length. This is conventional technology in the field, and its structure and working principle are not described in detail here.

[0054] When cleaning the inner wall of tank 1, the end of the second telescopic rod 731 retracts. At this time, the second telescopic rod 731 is not connected to the positioning hole 241. Therefore, as the drive motor 72 drives the threaded screw 71 to rotate, the adjusting nut 73 will move upward in the vertical direction and drive the base 2 to move upward through the support plate 74, thus completing the cleaning work of the inner wall of tank 1.

[0055] During testing, the second telescopic rod 731 extends and inserts into the positioning hole 241, achieving circumferential positioning of the adjusting nut 73 and the base 2. Therefore, as the drive motor 72 rotates the threaded screw 71, the adjusting nut 73 moves downwards vertically, and the base 2 moves downwards under its own weight. Simultaneously, the adjusting nut 73 drives the base 2 to rotate, causing the measuring roller 4116 on the base 2 to roll on the inner wall of the tank 1, increasing the detection range and ensuring the accuracy of the test results.

[0056] When it is necessary to clean the inner wall of tank 1, the first telescopic rod 3121 is activated, causing the first telescopic rod 3121 to drive the first slider 3122 to move along the sampling groove 22 towards the inner wall of tank 1, thereby driving the scraper 311 to move towards the inner wall of tank 1 until the scraper 311 is in contact with the inner wall of tank 1. The drive motor 72 is then activated, driving the threaded screw 71 to rotate, causing the adjusting nut 73 to rise along the threaded screw 71, thereby driving the support plate 74 to rise, and then driving the base 2 to rise through the support plate 74, so that the scraper 311 can clean the inner wall of tank 1, avoiding prolonged contact between molten salt and the inner wall of tank 1, thereby reducing the probability of tank 1 being corroded by molten salt.

[0057] The working process of the molten salt tank provided by this invention is as follows: As the scraper 311 moves toward the inner wall of the tank 1, the first telescopic rod 3121 pulls the limiting post 51 along the receiving groove 21 via the first pull rope 212, causing one end of the limiting post 51 to return to the receiving groove 21 through the limiting hole 11. At this time, the first elastic element 211 contracts under force, thereby releasing the lock between the tank 1 and the base 2, which facilitates cleaning of the inner wall of the tank 1 and makes it easier for the measuring roller 4116 to inspect the inner wall of the tank 1.

[0058] As the scraper 311 moves toward the inner wall of the tank 1, the scraper 311 drives the second slider 4112 to move. The second slider 4112 pulls the outer sleeve 4114 into the receiving hole 4113 through the second pull rope 4115, so that the second elastic element 4119 is stressed and the outer sleeve 4114 is completely retracted into the receiving hole 4113. This, in turn, drives the measuring roller 4116 to retract into the receiving hole 4113, avoiding contact between the measuring roller 4116 and the high-temperature molten salt, reducing the probability of corrosion of the measuring roller 4116, and improving the measurement accuracy of the measuring roller 4116.

[0059] As the scraper 311 moves toward the inner wall of the tank 1, the scraper 311 drives the limiting plate 3111 to extend out of the receiving cavity 262 of the receiving plate 26, so that the limiting plate 3111 covers the sampling groove 22, preventing molten salt from leaking out along the connecting groove 25, thus avoiding resource waste.

[0060] When the base 2 rises to the top of the threaded screw 71, the inner wall of the tank 1 is cleaned. At this time, the sampling slot 22 is connected to the sampling port 62 of the sampling tube 61. The suction pump located on the sampling tube 61 is started to transport the molten salt sample to the sampling tube 61, so that the operator can analyze the thermophysical parameters of the molten salt in real time, compare them with the standard parameters measured in the laboratory, and find problems in time.

[0061] After the inner wall of tank 1 is cleaned, the second telescopic rod 731 is activated, so that the adjusting nut 73 is circumferentially limited to the base 2. Then the first telescopic rod 3121 is activated, so that the first telescopic rod 3121 drives the first slider 3122 away from the inner wall of tank 1, and then drives the scraper 311 away from the inner wall of tank 1. At this time, the scraper 311 drives the second slider 4112 away from the inner wall of tank 1, and the pressure on the second elastic element 4119 decreases. The outer sleeve 4114 and the measuring roller 4116 are in contact with the inner wall of tank 1 under the action of the second elastic element 4119. When the measuring roller 4116 is in contact with the inner wall of tank 1, the pressure on the second elastic element 4119 is a fixed value. The drive motor 72 is activated, so that the drive motor 72 drives the base 2 and the measuring roller 4116 to rotate and descend, so that the measuring roller 4116 can perform a comprehensive inspection of the inner wall of tank 1.

[0062] During the process of measuring roller 4116 detecting the inner wall of tank 1, if the value of pressure sensor 4118 increases, it indicates that there is a bulge on the inner wall of tank 1; if the value of pressure sensor 4118 decreases, it indicates that there is a depression on the inner wall of tank 1.

[0063] As the first slider 3122 moves away from the inner wall of the tank 1, the pressure on the first elastic element 211 decreases. One end of the limiting post 51 is in contact with the inner wall of the tank 1 under the action of the first elastic element 211. When the base 2 is about to move to the bottom of the threaded screw 71, the drive motor 72 is turned off, so that the base 2 continues to rotate under the action of inertia until one end of the limiting post 51 enters the limiting hole 11, thereby fixing the base 2.

[0064] like Figure 10 As shown, the present invention also provides a molten salt energy storage heat exchange device, which includes the molten salt tank of any of the above-mentioned embodiments. The molten salt tank here includes all the technical features of the aforementioned molten salt tank. The aforementioned molten salt tank can be used as the high-temperature molten salt tank 9 of the molten salt energy storage heat exchange device. Based on this, the molten salt energy storage heat exchange device also includes a low-temperature molten salt tank 91, a molten salt electric heater 92, a steam generator 93, and a heat exchanger 94.

[0065] The molten salt electric heater 92 is connected via a pipe to a high-temperature molten salt tank 9 for storing high-temperature molten salt. The high-temperature molten salt tank 9 is connected via a pipe to a steam generator 93 for converting the heat carried by the high-temperature molten salt into steam. The steam generator 93 is connected via a pipe to a heat exchanger 94 for absorbing the heat from the steam. The heat exchanger 94 is equipped with a heat supply pipe 96 for transferring heat to the user and a recovery pipe 97 for recovering cooled water. The heat exchanger 94 is connected via a pipe to a water tank 95 for supplying water to the steam generator 93. The steam generator 93 and the water tank 95 are connected via a pipe. The steam generator 93 is connected via a pipe to a low-temperature molten salt tank 91 for storing the molten salt after heat exchange. The low-temperature molten salt tank 91 is connected to the molten salt electric heater 92 via a pipe.

[0066] It should be noted that: the molten salt electric heater 92 uses off-peak electricity; a molten salt valve is installed on the pipe connecting the molten salt electric heater 92 and the high-temperature molten salt tank 9; a high-temperature molten salt pump is installed on the pipe connecting the high-temperature molten salt tank 9 and the steam generator 93; a shut-off valve is installed on the pipe connecting the steam generator 93 and the heat exchanger 94; a shut-off valve is installed on the heat supply pipe 96; a circulating water pump is installed on the recovery pipe 97; a shut-off valve is installed on the pipe connecting the heat exchanger 94 and the water tank 95; a feed water pump is installed on the pipe connecting the steam generator 93 and the water tank 95; a molten salt valve is installed on the pipe connecting the steam generator 93 and the low-temperature molten salt tank 91; and a low-temperature molten salt pump is installed on the pipe connecting the molten salt electric heater 92 and the low-temperature molten salt tank 91.

[0067] This heat exchange method is a conventional technology in this field, and its working principle is not described in detail here.

[0068] In some embodiments, the molten salt tank described above can also be used as the low-temperature molten salt tank 91 of the molten salt energy storage and heat exchange device.

[0069] The present invention also provides a method for cleaning a molten salt tank, comprising the following steps: In step S1, the first driving member 312 drives the scraper 311 to extend out of the side of the base 2 until the extended end of the scraper 311 abuts against the inner wall of the tank 1. During this process, the detection end of the detection member 41 retracts back to the side of the base 2.

[0070] In step S2, the base 2 moves vertically upward and scrapes off the molten salt on the inner wall of the tank 1 through the extended end of the scraper 311.

[0071] In step S3, the first driving member 312 drives the scraper 311 to retract to the side of the base 2. During this process, the detection end of the detection member 41 extends out of the side of the base 2 and contacts the inner wall of the tank 1.

[0072] In step S4, the base 2 moves downward and contacts the inner wall of the tank 1 through the detection end of the detection element 41 to detect the smoothness of the inner wall of the tank 1.

[0073] The cleaning method of the molten salt tank provided by the present invention is implemented through the molten salt tank described above. Therefore, the structure and working principle of the molten salt tank will not be described again here.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A molten salt vessel, characterized in that, include: The tank (1) has a base (2) at the bottom, and the base (2) can move along the axial direction of the tank (1); The cleaning assembly (3) includes a plurality of cleaning components (31) spaced apart along the circumferential direction of the tank (1). Each cleaning component (31) includes a scraper (311) disposed on the base (2) and a first driving component (312). The first driving component (312) can drive the scraper (311) to move along the radial direction of the tank (1) so that the scraper (311) can extend or retract from the edge of the base (2). The detection component (4) includes a plurality of detection elements (41) disposed on the base (2). The detection end of the detection element (41) can retract to the side of the base (2) when the scraper (311) extends out of the side of the base (2), and can extend out of the side of the base (2) when the scraper (311) retracts out of the side of the base (2). The detection end of the detection element (41) can detect the smoothness of the inner wall of the tank (1) when it contacts the inner wall of the tank (1). The positioning component (5) includes a plurality of limiting posts (51) that extend along the radial direction of the tank body (1) on the base (2). The limiting posts (51) can extend out or retract along the radial direction of the tank body (1) at the edge of the base (2). The tank body (1) is provided with limiting holes (11) at the positions corresponding to the limiting posts (51). The tank (1) is provided with a plurality of receiving slots (21), each of which corresponds to a limiting post (51). A first elastic element (211) is provided within each receiving slot (21), extending radially along the tank (1). One end of the limiting post (51) is connected to the first elastic element (211), and the first elastic element (211) applies a spring force to the limiting post (51) in the direction toward the tank (1). The output end of the first driving element (312) is connected to the limiting post (51) via a first pull rope (212), so that when the output end of the first driving element (312) moves toward the tank (1), the first pull rope (212) can drive the limiting post (51) to move in a direction away from the tank (1). The detection element (41) includes: Mounting block (411) is disposed between two adjacent scrapers (311). The mounting block (411) has grooves (4111) on both sides. A second slider (4112) is slidably disposed in the grooves (4111) along the moving direction of the scraper (311). The second slider (4112) is connected to the scraper (311). The mounting block (411) has a receiving hole (4113). An outer sleeve (4114) is disposed inside the receiving hole (4113). The outer sleeve (4114) is connected to the second slider (4112) by a second pull rope (4115). When the second slider (4112) moves in the direction toward the tank (1), the outer sleeve (4114) moves in the direction away from the tank (1). Measuring roller (4116) is rotatably disposed at one end of the outer sleeve (4114) facing the tank (1), and the measuring roller (4116) extends along the axial direction of the tank (1); An inner sleeve (4117) is disposed inside the receiving hole (4113) and fixedly connected to the mounting block (411). A pressure sensor (4118) is provided inside the inner sleeve (4117). The end of the outer sleeve (4114) away from the measuring roller (4116) is sleeved on the open end of the inner sleeve (4117), and a second elastic element (4119) is provided between the outer sleeve (4114) and the pressure sensor (4118).

2. The molten salt vessel according to claim 1, characterized in that, The molten salt tank also includes a sampling component (6), which includes multiple sampling tubes (61) disposed on the outer periphery of the tank body (1). The sampling port (62) of the sampling tube (61) extends into the interior of the tank body (1). The base (2) is provided with a sampling groove (22). When the scraper (311) extends out of the edge of the base (2), the scraper (311) can cover the sampling groove (22). When the scraper (311) retracts to the edge of the base (2), the end of the sampling groove (22) near the inner wall of the tank body (1) is not covered by the scraper (311). When the base (2) moves to the top of the tank body (1), the sampling port (62) is opposite to the sampling groove (22).

3. The molten salt tank according to claim 2, characterized in that, The first driving member (312) includes a first telescopic rod (3121) disposed in the sampling groove (22), and a first slider (3122) is provided at the end of the first telescopic rod (3121). The scraper (311) is connected to the first slider (3122), and the cross-sectional shape of the first slider (3122) matches the cross-sectional shape of the sampling groove (22).

4. The molten salt vessel according to any one of claims 1 to 3, characterized in that, The molten salt tank further includes a second drive member (7) for moving the base (2) along the axial direction of the tank body (1), the top of the tank body (1) being sealed by a top cover (8), and the second drive member (7) comprising: A threaded screw (71) is inserted vertically inside the tank body (1); A drive motor (72) is mounted on the top cover (8) and is used to drive the threaded screw (71) to rotate. Adjusting nut (73) is sleeved on the outer circumference of the threaded screw (71); A support plate (74) is provided at the bottom of the adjusting nut (73) and rotates with the adjusting nut (73). The base (2) is provided with a support groove (23) that matches the support plate (74).

5. The molten salt vessel according to claim 4, characterized in that, The adjusting nut (73) is provided with a plurality of second telescopic rods (731) on its outer periphery. The ends of the second telescopic rods (731) can extend or retract from the periphery of the adjusting nut (73). The base (2) is provided with a socket (24) communicating with the support groove (23). The socket (24) allows the adjusting nut (73) to be inserted. The inner wall of the socket (24) is provided with a positioning hole (241) at a position corresponding to the second telescopic rod (731).

6. A molten salt energy storage heat exchange device, characterized in that, Includes the molten salt tank as described in any one of claims 1 to 5.

7. A method for cleaning a molten salt tank according to any one of claims 1 to 5, characterized in that, Includes the following steps: Step S1: The first driving member (312) drives the scraper (311) to extend out of the side of the base (2) until the extended end of the scraper (311) abuts against the inner wall of the tank (1). During this process, the detection end of the detection member (41) retracts back to the side of the base (2). Step S2, the base (2) moves vertically upward and scrapes off the molten salt on the inner wall of the tank (1) through the extended end of the scraper (311); In step S3, the first driving member (312) drives the scraper (311) to retract to the side of the base (2). During this process, the detection end of the detection member (41) extends out of the side of the base (2) and the detection end of the detection member (41) contacts the inner wall of the tank (1). In step S4, the base (2) moves downward and contacts the inner wall of the tank (1) through the detection end of the detection piece (41) to detect the smoothness of the inner wall of the tank (1).

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