Energy-saving seamless tube hot rolling waste heat recovery heat exchanger

Abstract

The invention discloses an energy-saving seamless tube hot rolling waste heat recovery heat exchanger, and relates to the technical field of heat exchangers, the energy-saving seamless tube hot rolling waste heat recovery heat exchanger comprises a box body with two open sides, an air inlet cover is detachably mounted on one side of the box body, an air outlet cover is detachably mounted on the other side of the box body, and a U-shaped tube is fixedly mounted in the box body; one end of the U-shaped pipe is fixedly connected with a water inlet pipe, the other end of the U-shaped pipe is fixedly connected with a water outlet pipe, and a material collecting box is arranged at the bottom of the inner side of the box body. The device is reasonable in structure, the driving assembly drives the removing assembly on the sliding assembly to scrape impurities attached to the surface of the U-shaped pipe, then the impurities are collected in a centralized mode through the material collecting box, and the situation that the impurities affect the heat recovery efficiency of the U-shaped pipe is avoided.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to an energy-saving seamless tube hot-rolled waste heat recovery heat exchanger. Background Technology

[0002] Heat exchangers are widely used in industrial applications for waste heat recovery from high-temperature, high-velocity dust-laden flue gas. In industries such as thermal power generation, steel smelting, and chemical production, the flue gas emitted from various industrial kilns and combustion equipment is typically characterized by high temperature, high-velocity flow, and the presence of a large amount of dust particles. Examples include the flue gas emitted from sintering machines in steel sintering processes and the high-temperature dust-laden tail gas generated by waste incinerators. These flue gases contain not only a large amount of recoverable heat.

[0003] Announcement No. CN120800031A describes a novel erosion-resistant waste heat recovery heat exchanger, comprising an upper shell, a lower shell, an integrated side plate box, heat exchange tubes, an exhaust port, and intercepting fins. The heat exchange tubes are arranged in multiple arrays, using a smooth surface and dense structure to reduce flue gas impact. Inverted V-shaped intercepting fins are located above the exhaust port, intercepting particles in the flue gas and recovering them through a negative pressure pipe. The overall multi-channel structure ensures efficient flue gas treatment and flow. This heat exchanger reduces erosion wear, extends equipment life, stably recovers waste heat, and ensures smooth operation of subsequent processes. It is suitable for high-temperature, dusty flue gas environments such as aluminum melting furnaces, offering energy savings and environmental friendliness.

[0004] There are still some problems with heat exchangers in actual use. In industrial waste heat recovery systems, copper tubes are widely used as heat exchange elements in gas waste heat recovery heat exchangers due to their excellent thermal conductivity and good corrosion resistance. However, industrial gases often contain impurities such as dust, oil, and sulfides. These substances come into contact with the surface of the copper tubes with the airflow and gradually deposit and adhere, forming a fouling layer with extremely low thermal conductivity. This fouling layer not only increases the thermal resistance and reduces the waste heat recovery efficiency, but also narrows the gas flow channel, increases the system resistance, and in severe cases, even causes localized corrosion of the copper tubes, shortening the service life of the heat exchanger. This has become a key issue restricting the stable and efficient operation of waste heat recovery systems. Summary of the Invention

[0005] The purpose of this application is to provide an energy-saving seamless tube hot rolling waste heat recovery heat exchanger, which realizes the scraping of impurities attached to the surface of the U-shaped tube by the cleaning component on the sliding component driven by the driving component, and then the impurities are collected in a collection box to avoid the impurities affecting the heat recovery efficiency of the U-shaped tube.

[0006] To achieve the above objectives, this application provides the following technical solution: an energy-saving seamless tube hot rolling waste heat recovery heat exchanger, comprising a box body with openings on both sides, an air inlet hood detachably installed on one side of the box body, an air outlet hood detachably installed on the other side of the box body, a U-shaped tube fixedly installed inside the box body, a water inlet pipe fixedly connected to one end of the U-shaped tube, a water outlet pipe fixedly connected to the other end of the U-shaped tube, and a material collection box provided at the bottom of the inner side of the box body; It also includes a drive assembly, a sliding assembly, and a clearing assembly. The drive assembly is disposed inside the housing for rotating the rod. The sliding assembly is disposed on the surface of the movable plate for use in conjunction with the drive assembly. The clearing assembly is disposed on the surface of the U-shaped tube for use in conjunction with the drive assembly.

[0007] Preferably, the drive assembly includes a partition plate fixedly installed on the top surface of the inner side of the housing, a rod rotatably connected to the partition plate, one end of the rod rotatably connected to a first bearing, the top end of the first bearing fixedly connected to the inner wall of the housing, and a gear fixedly installed on the rod.

[0008] Preferably, the gear has a toothed plate meshing at its bottom position, the bottom surface of the toothed plate is fixedly connected to a sleeve, the sleeve is slidably connected to a slide rod in a transverse position, the two ends of the slide rod are fixedly connected to a second bearing, and one end of the second bearing is fixedly connected to the partition plate.

[0009] Preferably, side plates are fixedly connected to both ends of the toothed plate, a butt plate is fixedly connected to the top of the side plate, and the other end of the butt plate is fixedly connected to the middle of the side of the frame.

[0010] Preferably, the frame has a sliding pulley inside, the pulley is rotatably connected to one end of the arm plate, the other end of the arm plate is fixedly connected to the bottom end of the transmission rod, the top end of the transmission rod is fixedly connected to the output end of the drive motor through the housing, the drive motor is fixedly mounted on the bracket, and the bracket is fixedly connected to the middle position of the top surface of the housing.

[0011] Preferably, the sliding assembly includes a pull plate fixedly connected to the rod body, the bottom end of the pull plate extending into the interior of the housing through the partition, a sliding groove being provided on the pull plate, and a guide wheel being slidably connected inside the sliding groove, the guide wheel being rotatably connected to a movable plate in a longitudinal position.

[0012] Preferably, a limiting rod is fixedly connected to the inner wall of the movable plate, a first collar is slidably connected to the limiting rod, a fixing rod is symmetrically fixedly connected to the surface of the first collar, a roller is rotatably connected to the fixing rod, and the roller is slidably connected to the surface of the U-shaped tube.

[0013] Preferably, a first spring is sleeved on the limiting rod, and the two ends of the first spring are fixedly connected to one side of the first collar and one side of the movable plate, respectively.

[0014] Preferably, the clearing assembly includes a placement plate fixedly installed at one end of the limiting rod, a positioning rod fixedly connected to the placement plate, a second collar slidably connected to the positioning rod, a first column fixedly connected to the surface of the second collar, a first frame plate fixedly connected to the other end of the first column, the other end of the first frame plate fixedly connected to a first truss, and first locking blocks fixedly connected to both ends of the first truss, the first locking blocks abutting against the surface of the U-shaped tube.

[0015] Preferably, a third collar is slidably connected to the positioning rod, and a second spring is sleeved on the positioning rod. The two ends of the second spring are fixedly connected to one side of the third collar and one side of the second collar, respectively. A second column is fixedly connected to the surface of the third collar, and a second frame plate is fixedly connected to the second column. A second truss is fixedly installed at the other end of the second frame plate, and second locking blocks are fixedly installed at both ends of the second truss. The second locking blocks are attached to the surface of the U-shaped tube.

[0016] In summary, the present invention has the following beneficial effects: 1. The present invention has a reasonable structure. The operation of the drive motor causes the transmission rod to rotate. The rotation of the transmission rod causes the pulley on the arm plate to slide inside the frame, thereby facilitating the lateral movement of the frame back and forth. The movement of the frame pushes the toothed plate on the side plate to move through the docking plate, thereby facilitating the sliding of the sleeve on the bottom surface of the toothed plate on the slide rod, increasing the stability of the toothed plate movement. The movement of the toothed plate causes the gear to rotate. The gear is fixedly connected to the rod body, and the rotation of the gear drives the rod body to rotate.

[0017] 2. In this invention, a pull plate is fixedly connected to the rod body. The pull plate rotates by rotating the rod body. A groove is provided on the pull plate, and a guide wheel is slidably connected inside the groove. The guide wheel slides inside the groove by rotating the pull plate, thereby facilitating the overall movement of the movable plate on the guide wheel. A limit rod is fixedly connected to the inner wall of the movable plate, and a first collar is slidably connected to the limit rod. A fixing rod is fixedly connected to the surface of the first collar, and a roller on the fixing rod is attached to the surface of the U-shaped tube by the elastic force of a first spring. The roller rotates on the surface of the U-shaped tube by moving the movable plate.

[0018] 3. In this invention, a placement plate is fixedly connected to the limiting rod, a positioning rod is fixedly connected to the placement plate, and a second spring is sleeved on the positioning rod. The second spring causes the second collar and the third collar to slide. The movement of the second collar causes the first locking block on the first truss to adhere to the surface of the U-shaped tube through the first frame plate on the first column. The movement of the third collar causes the second locking block on the second truss to adhere to the surface of the U-shaped tube through the second frame plate on the second column. Then, the movable plate moves as a whole to scrape off the adhering material on the surface of the U-shaped tube by the first locking block and the second locking block. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the box. Figure 2 This is a schematic diagram of the box's three-dimensional structure viewed from below; Figure 3 This is a schematic diagram of the internal three-dimensional structure of the box; Figure 4 This is a schematic diagram of the three-dimensional structure of a U-shaped tube; Figure 5 This is a schematic diagram of the three-dimensional structure of the movable panel; Figure 6 This is a schematic diagram of the three-dimensional structure of the pull plate; Figure 7 This is a schematic diagram of the three-dimensional structure of the limiting rod; Figure 8 This is a schematic diagram of the three-dimensional structure of the shelf; Figure 9 for Figure 4 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Housing; 101. Air inlet hood; 102. Air outlet hood; 103. U-shaped pipe; 104. Water inlet pipe; 105. Water outlet pipe; 106. Collection box; 2. Partition plate; 201. Rod; 202. First shaft seat; 203. Gear; 204. Gear plate; 205. Sleeve seat; 206. Slide rod; 207. Second shaft seat; 208. Side plate; 209. Connecting plate; 210. Frame; 211. Pulley; 212. Arm plate; 213. Transmission rod; 214. Drive motor; 215. Bracket; 3. Pull plate 301. Slide groove; 302. Guide wheel; 303. Movable plate; 304. Limiting rod; 305. First collar; 306. Fixing rod; 307. Roller; 308. First spring; 4. Shelf; 401. Positioning rod; 403. Second collar; 404. First column; 405. First shelf; 406. First truss; 407. First locking block; 408. Third collar; 409. Second spring; 410. Second column; 411. Second shelf; 412. Second truss; 413. Second locking block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Reference Figure 1 - Figure 9 The energy-saving seamless tube hot rolling waste heat recovery heat exchanger shown includes a box body 1 with openings on both sides. An air inlet hood 101 is detachably installed on one side of the box body 1, and an air outlet hood 102 is detachably installed on the other side of the box body 1. A U-shaped tube 103 is fixedly installed inside the box body 1. One end of the U-shaped tube 103 is fixedly connected to a water inlet pipe 104, and the other end of the U-shaped tube 103 is fixedly connected to a water outlet pipe 105. A material collection box 106 is provided at the bottom of the inner side of the box body 1. It also includes a drive assembly, a sliding assembly, and a cleaning assembly. The drive assembly is located inside the box body 1 and is used to rotate the rod 201. The sliding assembly is located on the surface of the movable plate 303 and is used in conjunction with the drive assembly. The cleaning assembly is located on the surface of the U-shaped tube 103 and is used in conjunction with the drive assembly.

[0024] Specifically, it should be noted that the drive motor 214 is electrically connected to the control unit via wires, and the specific working method between them is based on existing technology and will not be elaborated on here.

[0025] In one embodiment of this invention, the drive assembly includes a partition 2 fixedly installed on the top surface of the inner side of the housing 1. A rod 201 is rotatably connected to the partition 2. One end of the rod 201 is rotatably connected to a first bearing 202. The top end of the first bearing 202 is fixedly connected to the inner wall of the housing 1. A gear 203 is fixedly installed on the rod 201. A toothed plate 204 meshes with the bottom of the gear 203. The bottom surface of the toothed plate 204 is fixedly connected to a sleeve 205. The sleeve 205 is slidably connected to a slide rod 206 in a transverse position. Both ends of the slide rod 206 are fixedly connected to a second bearing 207. One end of the second bearing 207 is fixedly connected to the second bearing 207. A side plate 208 is fixedly connected to both ends of the toothed plate 204 on the partition plate 2. A docking plate 209 is fixedly connected to the top of the side plate 208. The other end of the docking plate 209 is fixedly connected to the middle of the side of the frame 210. A pulley 211 is slidably connected inside the frame 210. The pulley 211 is rotatably connected to one end of the arm plate 212. The other end of the arm plate 212 is fixedly connected to the bottom end of the transmission rod 213. The top end of the transmission rod 213 is fixedly connected to the output end of the drive motor 214 through the housing 1. The drive motor 214 is fixedly mounted on the bracket 215. The bracket 215 is fixedly connected to the middle of the top surface of the housing 1.

[0026] Specifically, the operation of the drive motor 214 causes the transmission rod 213 to rotate. The rotation of the transmission rod 213 causes the pulley 211 on the arm plate 212 to slide inside the frame 210, thereby facilitating the lateral movement of the frame 210. The movement of the frame 210 pushes the toothed plate 204 on the side plate 208 to move through the docking plate 209, thereby facilitating the sliding of the sleeve 205 on the bottom surface of the toothed plate 204 on the slide rod 206, increasing the stability of the movement of the toothed plate 204. The movement of the toothed plate 204 causes the gear 203 to rotate. The gear 203 is fixedly connected to the rod body 201, and the rotation of the gear 203 drives the rod body 201 to rotate.

[0027] As one embodiment of this invention, the sliding assembly includes a pull plate 3 fixedly connected to the rod 201. The bottom end of the pull plate 3 extends into the interior of the housing 1 through the partition 2. A sliding groove 301 is provided on the pull plate 3. A guide wheel 302 is slidably connected inside the sliding groove 301. The guide wheel 302 is rotatably connected to a movable plate 303 in a longitudinal position. A limiting rod 304 is fixedly connected to the inner wall of the movable plate 303. A first collar 305 is slidably connected to the limiting rod 304. A fixing rod 306 is symmetrically fixedly connected to the surface of the first collar 305. A roller 307 is rotatably connected to the fixing rod 306. The roller 307 is slidably connected to the surface of the U-shaped tube 103. A first spring 308 is sleeved on the limiting rod 304. The two ends of the first spring 308 are fixedly connected to one side of the first collar 305 and one side of the movable plate 303, respectively.

[0028] Specifically, a pull plate 3 is fixedly connected to the rod 201. The pull plate 3 rotates when the rod 201 rotates. A groove 301 is provided on the pull plate 3, and a guide wheel 302 is slidably connected inside the groove 301. The guide wheel 302 slides inside the groove 301 when the pull plate 3 rotates, thereby facilitating the overall movement of the movable plate 303 on the guide wheel 302. A limit rod 304 is fixedly connected to the inner wall of the movable plate 303, and a first collar 305 is slidably connected to the limit rod 304. A fixing rod 306 is fixedly connected to the surface of the first collar 305, and a roller 307 on the fixing rod 306 is attached to the surface of the U-shaped tube 103 by the elastic force of the first spring 308. The roller 307 rotates on the surface of the U-shaped tube 103 when the movable plate 303 moves.

[0029] In one embodiment of this invention, the clearing component includes a placement plate 4 fixedly installed at one end of a limiting rod 304. A positioning rod 401 is fixedly connected to the placement plate 4, and a second collar 403 is slidably connected to the positioning rod 401. A first column 404 is fixedly connected to the surface of the second collar 403. A first support plate 405 is fixedly connected to the other end of the first column 404. The other end of the first support plate 405 is fixedly connected to a first truss 406. First locking blocks 407 are fixedly connected to both ends of the first truss 406, and the first locking blocks 407 are attached to the surface of the U-shaped tube 103. On the surface, a third ring 408 is slidably connected to the positioning rod 401, and a second spring 409 is sleeved on the positioning rod 401. The two ends of the second spring 409 are fixedly connected to one side of the third ring 408 and one side of the second ring 403, respectively. A second column 410 is fixedly connected to the surface of the third ring 408, and a second frame plate 411 is fixedly connected to the second column 410. A second truss 412 is fixedly installed at the other end of the second frame plate 411. Second locking blocks 413 are fixedly installed at both ends of the second truss 412 and fit against the surface of the U-shaped tube 103.

[0030] Specifically, a shelf 4 is fixedly connected to the limiting rod 304, and a positioning rod 401 is fixedly connected to the shelf 4. A second spring 409 is sleeved on the positioning rod 401. The elastic force of the second spring 409 causes the second collar 403 and the third collar 408 to slide. The movement of the second collar 403 causes the first bracket 405 on the first column 404 to make the first locking block 407 on the first truss 406 fit against the surface of the U-shaped tube 103. The movement of the third collar 408 causes the second locking block 413 on the second truss 412 to fit against the surface of the U-shaped tube 103 through the second bracket 411 on the second column 410. Then, the movable plate 303 moves as a whole to scrape off the attachments on the surface of the U-shaped tube 103 by the first locking block 407 and the second locking block 413.

[0031] The working principle of this invention is as follows: The operation of the drive motor 214 causes the transmission rod 213 to rotate. The rotation of the transmission rod 213 causes the pulley 211 on the arm plate 212 to slide inside the frame 210, thereby facilitating the lateral movement of the frame 210. The movement of the frame 210 pushes the toothed plate 204 on the side plate 208 to move through the docking plate 209, thereby facilitating the sliding of the sleeve 205 on the bottom surface of the toothed plate 204 on the slide rod 206, increasing the stability of the movement of the toothed plate 204. The movement of the toothed plate 204 causes the gear 203 to rotate. The gear 203 is fixedly connected to the rod body 201, and the rotation of the gear 203 drives the rod body 201 to rotate. A pull plate 3 is fixedly connected to the rod 201. The pull plate 3 rotates when the rod 201 rotates. A groove 301 is provided on the pull plate 3, and a guide wheel 302 is slidably connected inside the groove 301. The guide wheel 302 slides inside the groove 301 when the pull plate 3 rotates, so that the movable plate 303 on the guide wheel 302 can move as a whole. A limit rod 304 is fixedly connected to the inner wall of the movable plate 303, and a first collar 305 is slidably connected to the limit rod 304. A fixing rod 306 is fixedly connected to the surface of the first collar 305, and a roller 307 on the fixing rod 306 is attached to the surface of the U-shaped tube 103 by the elastic force of the first spring 308. The roller 307 rotates on the surface of the U-shaped tube 103 when the movable plate 303 moves. A shelf 4 is fixedly connected to the limiting rod 304, and a positioning rod 401 is fixedly connected to the shelf 4. A second spring 409 is sleeved on the positioning rod 401. The elastic force of the second spring 409 causes the second collar 403 and the third collar 408 to slide. The movement of the second collar 403 causes the first bracket 405 on the first column 404 to make the first locking block 407 on the first truss 406 fit against the surface of the U-shaped tube 103. The movement of the third collar 408 causes the second bracket 411 on the second column 410 to make the second locking block 413 on the second truss 412 fit against the surface of the U-shaped tube 103. Then the movable plate 303 moves as a whole to make the first locking block 407 and the second locking block 413 scrape off the attachments on the surface of the U-shaped tube 103.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving seamless tube hot-rolled waste heat recovery heat exchanger, characterized in that, include: A box (1) with openings on both sides, an air inlet hood (101) is detachably installed on one side of the box (1), an air outlet hood (102) is detachably installed on the other side of the box (1), a U-shaped tube (103) is fixedly installed inside the box (1), a water inlet pipe (104) is fixedly connected to one end of the U-shaped tube (103), a water outlet pipe (105) is fixedly connected to the other end of the U-shaped tube (103), and a material collection box (106) is provided at the bottom of the inner side of the box (1). It also includes a drive assembly, a sliding assembly and a clearing assembly. The drive assembly is disposed inside the housing (1) for rotating the rod (201). The sliding assembly is disposed on the surface of the movable plate (303) for use in conjunction with the drive assembly. The clearing assembly is disposed on the surface of the U-tube (103) for use in conjunction with the drive assembly.

2. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 1, characterized in that: The drive assembly includes a partition (2) fixedly installed on the top surface of the inner side of the housing (1). A rod (201) is rotatably connected to the partition (2). One end of the rod (201) is rotatably connected to a first bearing (202). The top end of the first bearing (202) is fixedly connected to the inner wall of the housing (1). A gear (203) is fixedly installed on the rod (201).

3. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 2, characterized in that: The gear (203) is engaged with a toothed plate (204) at its bottom position. The bottom surface of the toothed plate (204) is fixedly connected to a sleeve (205). The sleeve (205) is slidably connected to a slide rod (206) in a transverse position. Both ends of the slide rod (206) are fixedly connected to a second bearing (207). One end of the second bearing (207) is fixedly connected to the partition plate (2).

4. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 3, characterized in that: Side plates (208) are fixedly connected to both ends of the toothed plate (204), and a butt plate (209) is fixedly connected to the top of the side plate (208). The other end of the butt plate (209) is fixedly connected to the middle of the side of the frame (210).

5. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 4, characterized in that: The frame (210) has a sliding pulley (211) inside, which is rotatably connected to one end of the arm plate (212). The other end of the arm plate (212) is fixedly connected to the bottom end of the transmission rod (213). The top end of the transmission rod (213) is fixedly connected to the output end of the drive motor (214) through the housing (1). The drive motor (214) is fixedly mounted on the bracket (215), which is fixedly connected to the middle of the top surface of the housing (1).

6. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 2, characterized in that: The sliding assembly includes a pull plate (3) fixedly connected to the rod (201). The bottom end of the pull plate (3) extends into the interior of the box (1) through the partition (2). A groove (301) is provided on the pull plate (3). A guide wheel (302) is slidably connected inside the groove (301). The guide wheel (302) is rotatably connected to a movable plate (303) in the longitudinal position.

7. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 6, characterized in that: A limiting rod (304) is fixedly connected to the inner wall of the movable plate (303). A first collar (305) is slidably connected to the limiting rod (304). A fixing rod (306) is symmetrically fixedly connected to the surface of the first collar (305). A roller (307) is rotatably connected to the fixing rod (306). The roller (307) is slidably connected to the surface of the U-shaped tube (103).

8. The energy-saving seamless tube hot rolling waste heat recovery heat exchanger according to claim 7, characterized in that: A first spring (308) is sleeved on the limiting rod (304), and the two ends of the first spring (308) are fixedly connected to one side of the first collar (305) and one side of the movable plate (303), respectively.

9. An energy-saving seamless tube hot-rolled waste heat recovery heat exchanger according to claim 7, characterized in that: The clearing assembly includes a shelf (4) fixedly installed at one end of the limiting rod (304), a positioning rod (401) fixedly connected to the shelf (4), a second collar (403) slidably connected to the positioning rod (401), a first column (404) fixedly connected to the surface of the second collar (403), a first shelf (405) fixedly connected to the other end of the first column (404), the other end of the first shelf (405) fixedly connected to the first truss (406), and a first locking block (407) fixedly connected to both ends of the first truss (406), the first locking block (407) abutting against the surface of the U-shaped tube (103).

10. An energy-saving seamless tube hot-rolled waste heat recovery heat exchanger according to claim 9, characterized in that: A third collar (408) is slidably connected to the positioning rod (401), and a second spring (409) is sleeved on the positioning rod (401). The two ends of the second spring (409) are fixedly connected to one side of the third collar (408) and one side of the second collar (403), respectively. A second column (410) is fixedly connected to the surface of the third collar (408), and a second frame plate (411) is fixedly connected to the second column (410). A second truss (412) is fixedly installed at the other end of the second frame plate (411), and a second locking block (413) is fixedly installed at both ends of the second truss (412). The second locking block (413) is attached to the surface of the U-shaped tube (103).

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