Heat energy system for heating molten salt

Abstract

The invention provides a heat energy system for heating molten salt, and relates to the technical field of molten salt processing, the heat energy system comprises a main heat exchanger and a secondary heat exchanger, the secondary heat exchanger is located on the side of the main heat exchanger, and the side wall of the side, away from the secondary heat exchanger, of the main heat exchanger fixedly communicates with a heat conduction structure; the heat conduction structure comprises a steam pipe, a cylindrical conveying pipe is arranged in the main heat exchanger, the solar salt can be circularly conveyed through the heat conduction structure, the solar salt circulates between the main heat exchanger and the secondary heat exchanger after exchanging heat with hot air in the main heat exchanger to 450 DEG C, ternary salt in the secondary heat exchanger is heated to be in a liquid state through the threaded conveying pipe, and the ternary salt in the secondary heat exchanger is heated to be in a liquid state. And meanwhile, the pipelines are in sealed sliding connection to ensure no leakage during solar salt circulation, so that closed circulation is realized, the heat loss is reduced to the minimum, the high-temperature thermal stability of the solar salt is utilized to avoid overtemperature decomposition of ternary salt caused by direct heating of high-temperature steam, and the safe and efficient operation of the industrial heat energy process is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of molten salt processing, and more specifically, relates to a thermal energy system for heating molten salt. Background Art

[0002] In many low- and medium-temperature heat utilization scenarios in the industrial field, ternary salts are often widely used as heat transfer fluids and thermal energy storage media. Traditional ternary salts are generally composed of a ternary mixture of sodium nitrate, potassium nitrate, and sodium nitrite. Their melting point is approximately 140°C and they are stable in the temperature range below 500°C. However, in actual applications, if ternary salts are directly heated with high-temperature steam or electric heaters, they are very likely to cause over-temperature thermal decomposition.

[0003] Industrial steam generating devices, such as supercritical boilers in power plants and process steam systems in refineries, often produce steam at temperatures of 600°C or below. Since the thermal decomposition temperature of ternary salts is relatively low, it is difficult to avoid thermal shock and decomposition by effectively controlling the heating process when using such steam for heating. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a thermal energy system for heating molten salt to solve the above problems.

[0005] A thermal energy system for heating molten salt comprises a primary heat exchanger and a secondary heat exchanger, wherein the secondary heat exchanger is located to the side of the primary heat exchanger:

[0006] A heat-conducting structure is fixedly connected to the side wall of the main heat exchanger away from the secondary heat exchanger;

[0007] The heat conduction structure includes a steam pipe, a cylindrical delivery pipe is provided inside the main heat exchanger, the upper end of the cylindrical delivery pipe is fixedly connected to the first pipe, the upper end of the first pipe is sealed and slidably connected to the second pipe, and the second pipe is U-shaped, a threaded delivery pipe is provided inside the secondary heat exchanger, the upper end of the threaded delivery pipe is fixedly connected to the third pipe, the third pipe is sealed and slidably connected to the secondary heat exchanger, the third pipe is rotatably installed with the second pipe, the lower end of the cylindrical delivery pipe is fixedly connected to the fourth pipe, a first high-temperature centrifugal pump is provided below the main heat exchanger, the output port of the first high-temperature centrifugal pump is fixedly connected to the fourth pipe, the input port of the first high-temperature centrifugal pump is fixedly connected to the fifth pipe, and the upper end of the fifth pipe is sealed and slidably connected to the sixth pipe The sixth pipe is fixedly connected to the threaded conveying pipe, the sixth pipe is sealed and slidably connected to the secondary heat exchanger, a top plate is fixedly installed on the circumferential surface of the sixth pipe, and a high-temperature motor is symmetrically provided under the secondary heat exchanger. An eccentric block is fixedly installed on the output shaft of each high-temperature motor, and each eccentric block is adapted to the top plate. Slide rails are symmetrically fixedly installed on the upper end of the secondary heat exchanger, and a sliding plate is slidably installed between the slide rails. The upper and lower ends of the secondary heat exchanger are respectively fixedly connected with the seventh pipe and the eighth pipe. A second high-temperature centrifugal pump is provided on the side of the secondary heat exchanger, the inlet of the second high-temperature centrifugal pump is fixedly connected to the eighth pipe, and the output port of the second high-temperature centrifugal pump is fixedly connected to the ninth pipe, and the sliding plate is rotatably installed with the third pipe.

[0008] Preferably, a fixing rod group is fixedly installed at the four corners of the upper end of the secondary heat exchanger, and a threaded rising cylinder is fixedly installed on the inner side of the fixing rod group. A spiral rising groove is opened inside the threaded rising cylinder, and a push rod is fixedly installed on the circumferential surface of the third pipe. The push rod is located above the sliding plate, and the push rod is located in the spiral rising groove of the threaded rising cylinder. The start-up of the high-temperature motor can drive the eccentric block to push the top plate, so that the top plate drives the threaded conveying pipe and the third pipe to slide up and down inside the secondary heat exchanger. At the same time, the third pipe will drive the push rod to rotate along the spiral rising groove inside the threaded rising cylinder, so that the third pipe drives the threaded conveying pipe and the sixth pipe to rise and rotate at the same time.

[0009] Preferably, a fixed plate group is provided on the circumferential surface of the cylindrical conveying pipe, and a plurality of annular jet devices are fixedly installed on the inner side of the fixed plate group, and an annular scraper is fixedly installed on the upper end of each annular jet device, and each of the annular jet device and the annular scraper is adapted to the cylindrical conveying pipe, and the fixed plate group, the annular jet device and the annular scraper are all located on the outside of the cylindrical conveying pipe, and a first bracket is installed on the side wall of the main heat exchanger, and a first air cylinder is symmetrically fixedly installed on the outside of the first bracket, and a first piston is provided inside each first air cylinder, and a first one-way valve group is symmetrically provided on the surface of each first air cylinder, and a first one-way valve cylinder is provided below each first air cylinder, and a first transmission rod is fixedly installed on the side wall of each first piston, and a first air pipe is fixedly connected between the first one-way valve cylinders, and the first air pipe portion extends to the inside of the main heat exchanger, and the input port of each annular jet device is commonly fixedly connected to a second air pipe, and the second air pipe is sealingly and slidingly connected to the first air pipe.

[0010] Preferably, a second bracket is fixedly installed between the main heat exchanger and the upper end of the steam pipe, a second air cylinder is symmetrically provided at the lower end of the second bracket, a second one-way valve group is provided on the surface of each second air cylinder, a second piston is provided inside each second air cylinder, the upper end of each second piston is fixedly installed with the second bracket, a second transmission rod is fixedly installed on the side wall of each second air cylinder, and a second one-way valve cylinder is provided at the lower end of each second air cylinder.

[0011] Preferably, L-shaped rods are symmetrically fixedly installed on the upper end of the fixed plate group, each of the L-shaped rods partially extends to the outside of the main heat exchanger and is sealed and slidably installed with the main heat exchanger, and each of the L-shaped rods is fixedly installed with the side wall of the second gas cylinder.

[0012] Preferably, the lower end of each second one-way valve cylinder is fixedly connected to a box body, the lower end of each box body is fixedly connected to a third air pipe, each third air pipe extends to the inside of the steam pipe and is sealed and slidably connected, an air suction nozzle is fixedly installed between the third air pipes, a vertical rod is symmetrically fixedly installed on the upper end of the air suction nozzle, a first strip scraper is fixedly installed on the side wall of the air suction nozzle, a second strip scraper is fixedly installed between the vertical rods, a filter is provided inside the steam pipe, and the first strip scraper and the second strip scraper are adapted to the filter.

[0013] Preferably, a support plate is fixedly installed on the upper end of the main heat exchanger, a lever is symmetrically installed on the outer side of the support plate, a pressure rod is fixedly installed on the upper end of the sliding plate, the pressure rod is slidably installed inside the lever, and the first transmission rod and the second transmission rod are slidably connected to the inside of the lever.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, by providing a heat-conducting structure, the circulation and transportation of solar salt can be completed. After the solar salt exchanges heat with the hot air in the main heat exchanger to 450°C, it circulates between the main heat exchanger and the secondary heat exchanger, and heats the ternary salt in the secondary heat exchanger to a liquid state through the threaded delivery pipe. At the same time, the sealed sliding connection of each pipe ensures that there is no leakage during the circulation of the solar salt, thereby realizing a closed cycle and minimizing heat energy loss. The high-temperature thermal stability of solar salt is utilized to avoid over-temperature decomposition of the ternary salt due to direct heating by high-temperature steam, thereby ensuring the safe and efficient operation of the industrial thermal energy process.

[0016] In the present invention, by providing a high-temperature motor, a worker can turn on the high-temperature motor to drive the eccentric block to rotate, thereby reciprocating the top plate, so that the top plate drives the sixth pipe, the threaded delivery pipe and the third pipe to slide up and down inside the secondary heat exchanger. At the same time, the third pipe drives the push rod to rotate along the spiral rising groove inside the threaded rising cylinder, prompting the threaded delivery pipe to rotate synchronously during the rising process. Therefore, the up and down movement and rotation of the threaded delivery pipe increase its contact area with the ternary salt inside the secondary heat exchanger, thereby enhancing the heat exchange efficiency, ensuring that the ternary salt is evenly heated and efficiently absorbs the heat transferred by the solar salt.

[0017] In the present invention, when the second air cylinder reciprocates, the fixed plate group is driven by the L-shaped rod, so that the annular scraper on the annular air jet device scrapes and cleans the surface of the cylindrical delivery pipe, thereby preventing impurities from adhering to the surface of the cylindrical delivery pipe and causing the heat exchange efficiency between the cylindrical delivery pipe and the inside of the main heat exchanger to decrease. Moreover, when the lever at one end of the second bracket moves downward, the first transmission rod presses down the first piston, squeezing the air in the first air cylinder into the first air pipe and transmitting it to the annular air jet device through the second air pipe, thereby blowing and cleaning impurities on the surface of the cylindrical delivery pipe. In this way, impurities on the surface of the cylindrical delivery pipe can be removed by both scraping and blowing away, thereby improving stability and reliability.

[0018] In the present invention, when the third pipe rises, the sliding plate and the pressure rod are driven to slide vertically back and forth between the slide rails, and the pressure rod pushes the lever to rotate with the support plate as the center, thereby causing the lever at one end of the second bracket to press the second transmission rod to press the second air cylinder downward, driving the box body and other components to move downward, and the impurities on the filter screen are scraped by the first scraper and the second scraper; when the second air cylinder descends, negative pressure will be generated due to the fixation of the second piston, and the scraped impurities will be sucked into the box body through the third air pipe through the suction nozzle, so that the scraping, suction and cleaning of the filter screen can be automatically completed, thereby preventing the accumulation of impurities from affecting the steam circulation efficiency, and the staff can conveniently clean the internal impurities by disassembling the box body;

[0019] In the present invention, a support plate is fixed on the upper end of the main heat exchanger, and a lever is symmetrically rotated and installed on its outer side. At the same time, a pressure rod is fixed on the upper end of the sliding plate, and the first transmission rod and the second transmission rod are also slidably installed inside the lever. The transmission action of the lever can be used to convert the vertical movement of the sliding plate into a horizontal thrust for the first transmission rod and the second transmission rod. When the sliding plate moves up and down with the third pipe, the pressure rod drives the lever to rotate with the support plate as the fulcrum, thereby pushing the first transmission rod to press down the first piston and pushing the second transmission rod to press down the second air cylinder, thereby realizing linkage control of the cleaning mechanism and enabling the equipment to synchronously complete impurity cleaning during the heat exchange process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the partial explosion structure of the main heat exchanger of the present invention;

[0022] Figure 3 is a cross-sectional view of the main heat exchanger of the present invention;

[0023] Figure 4 It is a schematic diagram of the main heat exchanger connection assembly structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the first bracket connection assembly structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the cylindrical conveying pipe connection assembly structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the first gas cylinder connection assembly structure of the present invention;

[0027] Figure 8 is a schematic diagram of the second bracket connection combination structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the box body connection assembly structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the first strip scraper connection assembly structure of the present invention;

[0030] Figure 11 is a cross-sectional view of a secondary heat exchanger of the present invention;

[0031] Figure 12 Schematic diagram of the secondary heat exchanger connection assembly structure of the present invention;

[0032] Figure 13 This is a schematic diagram of the fixed rod group connection assembly structure of the present invention;

[0033] Figure 14 This is a schematic diagram of the threaded conveying pipe connection assembly structure of the present invention;

[0034] Figure 15 It is a schematic diagram of the lever connection assembly structure of the present invention.

[0035] In the figure, the corresponding relationship between the names of the components and the drawing numbers is as follows: 11. main heat exchanger; 12. secondary heat exchanger; 13. steam pipe; 14. cylindrical delivery pipe; 15. first pipeline; 16. second pipeline; 17. threaded delivery pipe; 18. third pipeline; 19. fourth pipeline; 21. first high-temperature centrifugal pump; 22. fifth pipeline; 23. sixth pipeline; 24. top plate; 25. high-temperature motor; 26. eccentric block; 27. seventh pipeline; 28. eighth pipeline; 29. ​​second high-temperature centrifugal pump; 31. ninth pipeline; 32. slide rail; 33. slide plate; 34. pressure rod; 35. fixed rod group; 36. threaded rising cylinder; 37. top rod; 38. Fixed plate group; 39. Annular jet device; 41. Annular scraper; 42. First bracket; 43. First air cylinder; 44. First piston; 45. First one-way valve group; 46. First one-way valve cylinder; 47. First transmission rod; 48. First air pipe; 49. Second air pipe; 51. Second bracket; 52. Second air cylinder; 53. Second one-way valve group; 54. Second piston; 55. Second transmission rod; 56. Second one-way valve cylinder; 57. L-shaped rod; 58. Box body; 59. Third air pipe; 61. Suction nozzle; 62. Vertical rod; 63. First strip scraper; 64. Second strip scraper; 65. Filter; 66. Support plate; 67. Lever. DETAILED DESCRIPTION

[0036] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0037] See also Figures 1-15 The present invention provides a thermal energy system for heating molten salt, comprising a primary heat exchanger 11 and a secondary heat exchanger 12, wherein the secondary heat exchanger 12 is located on the side of the primary heat exchanger 11:

[0038] A heat-conducting structure is fixedly connected to the side wall of the primary heat exchanger 11 away from the secondary heat exchanger 12;

[0039] The heat conduction structure includes a steam pipe 13. A cylindrical delivery pipe 14 is provided inside the main heat exchanger 11. The upper end of the cylindrical delivery pipe 14 is fixedly connected to a first pipe 15. The upper end of the first pipe 15 is sealed and slidably connected to a second pipe 16. The second pipe 16 is U-shaped. A threaded delivery pipe 17 is provided inside the secondary heat exchanger 12. The upper end of the threaded delivery pipe 17 is fixedly connected to a third pipe 18. The third pipe 18 is sealed and slidably connected to the secondary heat exchanger 12. The third pipe 18 is rotatably installed with the second pipe 16. The lower end of the cylindrical delivery pipe 14 is fixedly connected to a fourth pipe 19. A first high-temperature centrifugal pump 21 is provided below the main heat exchanger 11. The first high-temperature centrifugal pump 21 is provided below the main heat exchanger 11. The output port of the centrifugal pump 21 is fixedly connected to the fourth pipe 19. The input port of the first high-temperature centrifugal pump 21 is fixedly connected to a fifth pipe 22. The upper end of the fifth pipe 22 is sealed and slidably connected to the sixth pipe 23. The sixth pipe 23 is fixedly connected to the threaded delivery pipe 17. The sixth pipe 23 is sealed and slidably connected to the secondary heat exchanger 12. The upper and lower ends of the secondary heat exchanger 12 are fixedly connected to the seventh pipe 27 and the eighth pipe 28, respectively. A second high-temperature centrifugal pump 29 is provided on the side of the secondary heat exchanger 12. The input port of the second high-temperature centrifugal pump 29 is fixedly connected to the eighth pipe 28, and the output port of the second high-temperature centrifugal pump 29 is fixedly connected to the ninth pipe 31.

[0040] By setting up a heat-conducting structure, the circulation and transportation of solar salt can be completed. After the solar salt exchanges heat with the hot air in the main heat exchanger 11 to 450°C, it circulates between the main heat exchanger 11 and the secondary heat exchanger 12, and heats the ternary salt in the secondary heat exchanger 12 to liquid through the threaded conveying pipe 17. At the same time, the sealed sliding connection of each pipeline ensures that there is no leakage when the solar salt circulates, thereby realizing a closed cycle and minimizing heat energy loss. The high-temperature thermal stability of solar salt is utilized to avoid over-temperature decomposition of the ternary salt due to direct heating by high-temperature steam, thereby ensuring the safe and efficient implementation of the industrial thermal energy process.

[0041] A top plate 24 is fixedly mounted on the circumferential surface of the sixth pipe 23. A high-temperature motor 25 is symmetrically arranged below the secondary heat exchanger 12. An eccentric block 26 is fixedly mounted on the output shaft of each high-temperature motor 25. Each eccentric block 26 is adapted to the top plate 24. A fixed rod group 35 is fixedly mounted at the four corners of the upper end of the secondary heat exchanger 12. A threaded rising cylinder 36 is fixedly mounted on the inner side of the fixed rod group 35. A spiral rising groove is provided inside the threaded rising cylinder 36. A top rod 37 is fixedly mounted on the circumferential surface of the third pipe 18. The push rod 37 is located above the sliding plate 33 and is located in the spiral ascending groove of the threaded ascending cylinder 36. When the high-temperature motor 25 is started, the eccentric block 26 can be driven to push the top plate 24, so that the top plate 24 drives the threaded delivery pipe 17 and the third pipe 18 to slide up and down inside the secondary heat exchanger 12. At the same time, the third pipe 18 will drive the push rod 37 to rotate along the spiral ascending groove inside the threaded ascending cylinder 36, so that the third pipe 18 drives the threaded delivery pipe 17 and the sixth pipe 23 to rise and rotate at the same time.

[0042] By setting up a high-temperature motor 25, the staff can turn on the high-temperature motor 25 to drive the eccentric block 26 to rotate, and then push the top plate 24 back and forth, so that the top plate 24 drives the sixth pipe 23, the threaded conveying pipe 17 and the third pipe 18 to slide back and forth up and down inside the secondary heat exchanger 12. At the same time, the third pipe 18 drives the push rod 37 to rotate along the spiral rising groove inside the threaded rising cylinder 36, prompting the threaded conveying pipe 17 to rotate synchronously during the rising process. Therefore, through the up and down movement and rotation of the threaded conveying pipe 17, its contact area with the ternary salt inside the secondary heat exchanger 12 is increased, thereby enhancing the heat exchange efficiency, ensuring that the ternary salt is evenly heated and efficiently absorbs the heat transferred by the solar salt.

[0043] The upper end of the secondary heat exchanger 12 is symmetrically fixed with a slide rail 32, and a slide plate 33 is slidably installed between the slide rails 32. The slide plate 33 is rotatably installed with the third pipe 18. The circumferential surface of the cylindrical delivery pipe 14 is provided with a fixed plate group 38, and a plurality of annular jet devices 39 are fixedly installed on the inner side of the fixed plate group 38. An annular scraper 41 is fixedly installed on the upper end of each annular jet device 39. Each annular jet device 39 and the annular scraper 41 are adapted to the cylindrical delivery pipe 14. The fixed plate group 38, the annular jet device 39 and the annular scraper 41 are all located on the outside of the cylindrical delivery pipe 14. A first bracket 42 is installed on the side wall of the main heat exchanger 11. A first air cylinder 43 is symmetrically fixedly installed on the outside of the first bracket 42. Each first air cylinder 43 is provided with a first active Plug 44, a first one-way valve group 45 is symmetrically provided on the surface of each first air cylinder 43, a first one-way valve cylinder 46 is provided below each first air cylinder 43, a first transmission rod 47 is fixedly installed on the side wall of each first piston 44, a first air pipe 48 is fixedly connected between the first one-way valve cylinders 46, and the first air pipe 48 partially extends into the interior of the main heat exchanger 11, and the input port of each annular jet device 39 is commonly fixedly connected to a second air pipe 49, and the second air pipe 49 is sealed and slidably connected to the first air pipe 48, and an L-shaped rod 57 is symmetrically fixedly installed on the upper end of the fixed plate group 38, each L-shaped rod 57 partially extends to the outside of the main heat exchanger 11 and is sealed and slidably installed with the main heat exchanger 11, and each L-shaped rod 57 is fixedly installed on the side wall of the second air cylinder 52;

[0044] The first one-way valve assembly 45 can transport air from the outside of the first air cylinder 43 into the inside of the first air cylinder 43. The first one-way valve cylinder 46 can prevent the transported gas from flowing back, so that when the first piston 44 is pressed down, the air can be transported to the first air pipe 48.

[0045] When the second air cylinder 52 moves back and forth, the fixed plate group 38 is driven by the L-shaped rod 57, so that the annular scraper 41 on the annular jet device 39 scrapes and cleans the surface of the cylindrical conveying pipe 14, thereby preventing impurities from adhering to the surface of the cylindrical conveying pipe 14 and causing the heat exchange efficiency between the cylindrical conveying pipe 14 and the main heat exchanger 11 to decrease. Moreover, when the lever 67 at one end of the second bracket 51 moves downward, the first transmission rod 47 presses down the first piston 44, squeezing the air in the first air cylinder 43 into the first air pipe 48 and transmitting it to the annular jet device 39 through the second air pipe 49, thereby blowing and cleaning the impurities on the surface of the cylindrical conveying pipe 14. In this way, impurities on the surface of the cylindrical conveying pipe 14 can be removed by both scraping and blowing away, thereby improving stability and reliability.

[0046] A second bracket 51 is fixedly installed between the main heat exchanger 11 and the upper end of the steam pipe 13. A second gas cylinder 52 is symmetrically provided at the lower end of the second bracket 51. A second one-way valve group 53 is provided on the surface of each second gas cylinder 52. A second piston 54 is provided inside each second gas cylinder 52. The upper end of each second piston 54 is fixedly installed with the second bracket 51. A second transmission rod 55 is fixedly installed on the side wall of each second gas cylinder 52. A second one-way valve cylinder 56 is provided at the lower end of each second gas cylinder 52. The lower end of each second one-way valve cylinder 56 is provided. A box body 58 is fixedly connected, and a third air pipe 59 is fixedly connected to the lower end of each box body 58. Each third air pipe 59 extends into the interior of the steam pipe 13 and is sealed and slidably connected. An air suction nozzle 61 is fixedly installed between the third air pipes 59. A vertical rod 62 is symmetrically fixedly installed on the upper end of the air suction nozzle 61. A first strip scraper 63 is fixedly installed on the side wall of the air suction nozzle 61. A second strip scraper 64 is fixedly installed between the vertical rods 62. A filter screen 65 is provided inside the steam pipe 13. The first strip scraper 63 and the second strip scraper 64 are adapted to the filter screen 65.

[0047] The air inside the second air cylinder 52 can be discharged outward through the second one-way valve assembly 53. The second one-way valve cylinder 56 can prevent the air inside the second air cylinder 52 from being transported to the box body 58 and the third air pipe 59 through the second one-way valve cylinder 56, and only allows the air in the third air pipe 59 to be transported to the second air cylinder 52 in one direction.

[0048] When the third pipe 18 rises, it drives the sliding plate 33 and the pressure rod 34 to slide vertically back and forth between the slide rails 32, and the pressure rod 34 pushes the lever 67 to rotate around the support plate 66, so that the lever 67 at one end of the second bracket 51 presses the second transmission rod 55 to press the second air cylinder 52, driving the box body 58 and other components to move downward, and the impurities of the filter screen 65 are scraped by the first strip scraper 63 and the second strip scraper 64; when the second air cylinder 52 descends, negative pressure will be generated due to the fixation of the second piston 54, and the scraped impurities will be sucked into the box body 58 through the third air pipe 59 through the suction nozzle 61. In this way, the scraping, suction and cleaning of the filter screen 65 can be automatically completed to avoid the accumulation of impurities affecting the steam circulation efficiency, and the staff can easily clean the internal impurities by disassembling the box body 58.

[0049] A support plate 66 is fixedly mounted on the upper end of the main heat exchanger 11. A lever 67 is symmetrically mounted on the outer side of the support plate 66. A pressure rod 34 is fixedly mounted on the upper end of the sliding plate 33. The pressure rod 34 is slidably mounted inside the lever 67. The first transmission rod 47 and the second transmission rod 55 are slidably connected to the inside of the lever 67.

[0050] By fixing the support plate 66 at the upper end of the main heat exchanger 11 and symmetrically rotating and installing the lever 67 on its outer side, and fixing the pressure rod 34 at the upper end of the sliding plate 33, and the first transmission rod 47 and the second transmission rod 55 are also slidably installed inside the lever 67, the transmission action of the lever 67 can be used to convert the vertical movement of the sliding plate 33 into a horizontal thrust on the first transmission rod 47 and the second transmission rod 55. When the sliding plate 33 moves up and down with the third pipe 18, the pressure rod 34 pushes the lever 67 to rotate with the support plate 66 as the fulcrum, thereby pushing the first transmission rod 47 to press down the first piston 44 and pushing the second transmission rod 55 to press down the second air cylinder 52, thereby realizing the linkage control of the cleaning mechanism and enabling the equipment to synchronously complete the impurity cleaning during the heat exchange process.

[0051] Working principle:

[0052] The first step is that when in use, the staff can first transport industrial steam of 600°C or below into the main heat exchanger 11 through the steam pipe 13, and the impurities on the steam will be filtered by the filter 65, and heat will be generated inside the main heat exchanger 11. Then, the staff can start the first high-temperature centrifugal pump 21, so that the first high-temperature centrifugal pump 21 circulates the solar salt (composed of sodium nitrate and potassium nitrate in a weight ratio of 60:40, with a melting point of about 221°C) through the fourth pipe 19, the cylindrical conveying pipe 14, the first pipe 15, the second pipe 16, the third pipe 18, the threaded conveying pipe 17, the sixth pipe 23, and the fifth pipe 22. In this process, the solar salt exchanges heat with the hot air inside the main heat exchanger 11 and is heated to about 450°C. This temperature not only utilizes the high temperature heat of the solar salt, but also Stability (it can stably transfer heat below 600°C), and avoids the problem of over-temperature decomposition caused by directly heating the ternary salt with high-temperature steam. Since the solar salt carries high temperature and circulates between the main heat exchanger 11 and the secondary heat exchanger 12, the threaded conveying pipe 17 will heat the ternary salt (composed of sodium nitrate, potassium nitrate and a third nitrate such as calcium nitrate, with a melting point of about 140°C) inside the secondary heat exchanger 12 to melt it into a liquid state, thereby completing a closed cycle, minimizing heat energy loss, and achieving continuous high-temperature heat transfer. At the same time, the staff can connect equipment for thermal energy storage or industry between the seventh pipeline 27 and the ninth pipeline 31, and start the second high-temperature centrifugal pump 29 to complete the circulation of the ternary salt through the seventh pipeline 27, the eighth pipeline 28 and the second high-temperature centrifugal pump 29 to complete thermal energy storage;

[0053] In the second step, when the staff turns on the high-temperature motor 25, the high-temperature motor 25 drives the eccentric block 26 to rotate, so that the eccentric block 26 reciprocates and pushes the top plate 24, and the top plate 24 drives the sixth pipe 23, the threaded delivery pipe 17, the third pipe 18 and the second pipe 16 to move. At this time, the threaded delivery pipe 17 reciprocates up and down inside the secondary heat exchanger 12, and is sealed and slidably connected with the first pipe 15, the fifth pipe 22 and the sixth pipe 23 through the second pipe 16, ensuring that the circulation of solar salt is not affected. When the third pipe 18 rises, it drives the push rod 37 to rotate along the spiral rising groove inside the threaded rising cylinder 36, so that the threaded delivery pipe 17 rotates synchronously, thereby increasing the contact area with the ternary salt inside the secondary heat exchanger 12 and enhancing the heat exchange efficiency.

[0054] In the third step, when the third pipe 18 rises, it drives the sliding plate 33 and the pressure rod 34 to slide vertically back and forth between the slide rails 32, so that the pressure rod 34 pushes the lever 67, and the lever 67 rotates with the support plate 66 as the center point, thereby causing the lever 67 at one end of the second bracket 51 to press the second transmission rod 55 to move downward. As a result, the second transmission rod 55 presses down the second air cylinder 52, driving the box body 58, the third air pipe 59, and the suction nozzle 61 to move downward, so that the first strip scraper 63 and the second strip scraper 64 scrape impurities on the filter 65 to prevent impurities from accumulating and affecting the steam circulation efficiency.

[0055] In the fourth step, when the second air cylinder 52 descends, since the second piston 54 is fixed, the independent movement of the second air cylinder 52 will generate negative pressure, and the impurities scraped by the first strip scraper 63 and the second strip scraper 64 are sucked into the box body 58 through the third air pipe 59 through the suction nozzle 61, thereby completing the scraping and suction cleaning process of the filter 65. The staff can complete the cleaning of the internal impurities by disassembling the box body 58. When the third pipeline 18 descends, the second transmission rod 55 at one end of the second bracket 51 will move upward and reset, so that when the second air cylinder 52 rises, the air squeezed inside the second air cylinder 52 is discharged through the second one-way valve group 53, thereby completing the process;

[0056] In the fifth step, when the second air cylinder 52 moves back and forth, the L-shaped rod 57 drives the fixed plate group 38 through the second air cylinder 52, so that the fixed plate group 38 drives the annular scraper 41 on the annular jet device 39 to blow and clean the circumferential surface of the cylindrical conveying pipe 14. When the lever 67 at one end of the second bracket 51 moves downward, the lever 67 will press the first piston 44 downward through the first transmission rod 47, so that the first piston 44 slides inside the first air cylinder 43, squeezing the air inside the first air cylinder 43 into the first air pipe 48, and transmitting it to the inside of the annular jet device 39 through the second air pipe 49, thereby completing the annular jet device 39 to blow and clean the impurities on the surface of the cylindrical conveying pipe 14, thereby completing the scraping and blowing cleaning, and through the sealed sliding of the first air pipe 48 and the second air pipe 49, the gas delivery can be completed at this time.

[0057] Among them: the pipes and air pipes used are all made of hard materials and are corrosion-resistant.

[0058] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A thermal energy system for heating molten salt, comprising a primary heat exchanger (11) and a secondary heat exchanger (12), wherein the secondary heat exchanger (12) is located to the side of the primary heat exchanger (11), and is characterized in that: A heat-conducting structure is fixedly connected to the side wall of the main heat exchanger (11) away from the secondary heat exchanger (12); The heat-conducting structure comprises a steam pipe (13), a filter screen (65) is provided inside the steam pipe (13), a cylindrical delivery pipe (14) is provided inside the main heat exchanger (11), the upper end of the cylindrical delivery pipe (14) is fixedly connected to a first pipe (15), the upper end of the first pipe (15) is sealed and slidably connected to a second pipe (16), a threaded delivery pipe (17) is provided inside the secondary heat exchanger (12), the upper end of the threaded delivery pipe (17) is fixedly connected to a third pipe (18), the third pipe (18) is sealed and slidably connected to the secondary heat exchanger (12), and the third pipe (18) is connected to the first pipe (16). The two pipes (16) are rotatably installed, the lower end of the cylindrical delivery pipe (14) is fixedly connected to a fourth pipe (19), a first high-temperature centrifugal pump (21) is provided below the main heat exchanger (11), the output port of the first high-temperature centrifugal pump (21) is fixedly connected to the fourth pipe (19), the input port of the first high-temperature centrifugal pump (21) is fixedly connected to a fifth pipe (22), the upper end of the fifth pipe (22) is sealed and slidably connected to a sixth pipe (23), the upper end of the secondary heat exchanger (12) is symmetrically fixedly installed with slide rails (32), and a slide plate (33) is slidably installed between the slide rails (32).

2. A thermal energy system for heating molten salt according to claim 1, characterized in that: The sixth pipe (23) is fixedly connected to the threaded conveying pipe (17), and the sixth pipe (23) is sealed and slidably connected to the secondary heat exchanger (12). A top plate (24) is fixedly installed on the circumferential surface of the sixth pipe (23). A high-temperature motor (25) is symmetrically provided below the secondary heat exchanger (12). An eccentric block (26) is fixedly installed on the output shaft of each high-temperature motor (25), and each eccentric block (26) is adapted to the top plate (24). The upper end and lower end of the secondary heat exchanger (12) are fixedly connected to the seventh pipe (27) and the eighth pipe (28), respectively. A second high-temperature centrifugal pump (29) is provided on the side of the secondary heat exchanger (12). The input port of the second high-temperature centrifugal pump (29) is fixedly connected to the eighth pipe (28), and the output port of the second high-temperature centrifugal pump (29) is fixedly connected to the ninth pipe (31). The sliding plate (33) is rotatably installed with the third pipe (18).

3. A thermal energy system for heating molten salt according to claim 2, characterized in that: A fixed rod group (35) is fixedly installed at the four corners of the upper end of the secondary heat exchanger (12), and a threaded rising cylinder (36) is fixedly installed on the inner side of the fixed rod group (35). A spiral rising groove is opened inside the threaded rising cylinder (36). A push rod (37) is fixedly installed on the circumferential surface of the third pipe (18). The push rod (37) is located above the sliding plate (33) and is located in the spiral rising groove of the threaded rising cylinder (36). The start-up of the high-temperature motor (25) can drive the eccentric block (26) to push the top plate (24), so that the top plate (24) drives the threaded delivery pipe (17) and the third pipe (18) to slide up and down inside the secondary heat exchanger (12). At the same time, the third pipe (18) will drive the push rod (37) to rotate along the spiral rising groove inside the threaded rising cylinder (36), so that the third pipe (18) drives the threaded delivery pipe (17) and the sixth pipe (23) to rise and rotate at the same time.

4. A thermal energy system for heating molten salt according to any one of claims 1 to 3, characterized in that: A fixed plate group (38) is provided on the circumferential surface of the cylindrical conveying pipe (14), and a plurality of annular jet devices (39) are fixedly installed on the inner side of the fixed plate group (38). An annular scraper (41) is fixedly installed on the upper end of each annular jet device (39), and each annular jet device (39) and annular scraper (41) are adapted to the cylindrical conveying pipe (14).

5. A thermal energy system for heating molten salt according to claim 4, characterized in that: The fixed plate group (38), the annular jet device (39) and the annular scraper (41) are all located outside the cylindrical delivery pipe (14). A first bracket (42) is installed on the side wall of the main heat exchanger (11). First gas cylinders (43) are symmetrically fixedly installed outside the first bracket (42). Each first gas cylinder (43) is provided with a first piston (44) inside.

6. A thermal energy system for heating molten salt according to claim 5, characterized in that: A first one-way valve group (45) is symmetrically provided on the surface of each first air cylinder (43), a first one-way valve cylinder (46) is provided below each first air cylinder (43), a first transmission rod (47) is fixedly installed on the side wall of each first piston (44), a first air pipe (48) is fixedly connected between the first one-way valve cylinders (46), and a portion of the first air pipe (48) extends into the interior of the main heat exchanger (11), and the input port of each annular jet device (39) is fixedly connected to a second air pipe (49), and the second air pipe (49) is sealed and slidably connected to the first air pipe (48).

7. A thermal energy system for heating molten salt according to claim 6, characterized in that: A second bracket (51) is fixedly installed between the main heat exchanger (11) and the upper end of the steam pipe (13), and a second gas cylinder (52) is symmetrically provided at the lower end of the second bracket (51). A second one-way valve group (53) is provided on the surface of each second gas cylinder (52), and a second piston (54) is provided inside each second gas cylinder (52). The upper end of each second piston (54) is fixedly installed with the second bracket (51), a second transmission rod (55) is fixedly installed on the side wall of each second gas cylinder (52), and a second one-way valve cylinder (56) is provided at the lower end of each second gas cylinder (52).

8. A thermal energy system for heating molten salt according to claim 7, characterized in that: An L-shaped rod (57) is symmetrically fixedly mounted on the upper end of the fixed plate group (38), each of the L-shaped rods (57) partially extends to the outside of the main heat exchanger (11) and is sealed and slidably mounted on the main heat exchanger (11), and each of the L-shaped rods (57) is fixedly mounted on the side wall of the second gas cylinder (52).

9. A thermal energy system for heating molten salt according to claim 8, characterized in that: The lower end of each second one-way valve cylinder (56) is fixedly connected to a box body (58), and the lower end of each box body (58) is fixedly connected to a third air pipe (59). Each third air pipe (59) extends to the inside of the steam pipe (13) and is sealed and slidably connected. An air suction nozzle (61) is fixedly installed between the third air pipes (59). A vertical rod (62) is symmetrically fixedly installed on the upper end of the air suction nozzle (61). A first strip scraper (63) is fixedly installed on the side wall of the air suction nozzle (61). A second strip scraper (64) is fixedly installed between the vertical rods (62). The first strip scraper (63) and the second strip scraper (64) are adapted to the filter screen (65).

10. A thermal energy system for heating molten salt according to claim 7, characterized in that: A support plate (66) is fixedly mounted on the upper end of the main heat exchanger (11), a lever (67) is symmetrically mounted on the outer side of the support plate (66), a pressure rod (34) is fixedly mounted on the upper end of the sliding plate (33), the pressure rod (34) is slidably mounted inside the lever (67), and the first transmission rod (47) and the second transmission rod (55) are slidably connected to the inside of the lever (67).

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