Energy-saving heat recovery device of aluminum bar hot shearing heating furnace

Abstract

This invention provides an energy-saving heat recovery device for an aluminum rod hot shearing furnace, relating to the field of energy-saving heat recovery technology. The energy-saving heat recovery device for the aluminum rod hot shearing furnace includes: a base, a heat exchange box, and multiple fume extraction devices. The heat exchange box is fixedly installed on the top of the base, and the multiple fume extraction devices are all fixedly installed on the inner wall of the top of the heat exchange box. A gas collecting cylinder is fixedly installed on the top of the heat exchange box. A waste heat recovery treatment mechanism is provided inside the base. The waste heat recovery treatment mechanism further includes a pretreatment component and a heat exchange switching component. The pretreatment component is used to straighten and remove dust from the flue gas. The energy-saving heat recovery device for the aluminum rod hot shearing furnace provided by this invention has the advantages of uniform flue gas flow, balanced heat exchange on the heat exchange plate surface, reduced localized scabbing, switching between main and auxiliary heat exchange plates, and cleaning of the sludge layer on the surface of the heat exchange plates.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat recovery technology, and in particular to an energy-saving heat recovery device for an aluminum rod hot shearing furnace. Background Technology

[0002] The core function of the energy-saving heat recovery device for aluminum rod hot shearing furnace is to recover the high-temperature flue gas and waste heat dissipated from the furnace surface, convert it into usable heat energy to be reinvested in production or auxiliary systems, and ultimately achieve energy saving and carbon reduction, reduce fuel costs, improve combustion efficiency, and meet environmental emission requirements.

[0003] In traditional energy-saving heat recovery devices for aluminum rod hot shearing furnaces, when recovering waste heat, the high-temperature flue gas entering the heat exchange chamber is prone to turbulent and uneven airflow distribution. This causes the flue gas to concentrate on scouring local areas of the heat exchange plates, resulting in uneven heat exchange temperature on the plate surface and low local heat exchange efficiency. At the same time, dust, aluminum shavings, and other impurities carried in the flue gas tend to accumulate and sinter in large quantities at certain locations on the heat exchange plates, forming local scabs and caking, further exacerbating the problem of uneven heat exchange.

[0004] Therefore, it is necessary to provide an energy-saving heat recovery device for an aluminum rod hot shearing furnace to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide an energy-saving heat recovery device for an aluminum rod hot shearing furnace that provides uniform flue gas flow, balanced heat exchange on the heat exchange plate surface, prevents local scabbing, enables switching between main and auxiliary heat exchange plates, and cleans the scabbing layer on the surface of the heat exchange plates.

[0006] To solve the above-mentioned technical problems, the present invention provides an energy-saving heat recovery device for an aluminum rod hot shearing furnace, comprising: a base, a heat exchange box, and multiple smoke extraction devices. The heat exchange box is fixedly installed on the top of the base, and the multiple smoke extraction devices are all fixedly installed on the inner wall of the top of the heat exchange box. A gas collection cylinder is fixedly installed on the top of the heat exchange box. A waste heat recovery treatment mechanism is provided inside the base. The waste heat recovery treatment mechanism further includes a pretreatment component and a heat exchange switching component. The pretreatment component is used to straighten and remove dust from the flue gas, and the heat exchange switching component is used to switch and alternate the use of the main and auxiliary heat exchange plates.

[0007] Preferably, one end of the air collecting cylinder is fixedly installed with one end of the air supply pipe, and one end of the connecting pipe is fixedly installed on one side of the outer wall of each of the multiple smoke extraction devices. The other ends of the multiple connecting pipes extend to the outside of the heat exchange box and are fixedly connected to the outer wall of the air collecting cylinder.

[0008] Preferably, the pretreatment component includes a first housing, a fixed frame, a negative pressure extraction component, and a cold air exhaust pipe. The first housing is fixedly installed inside the base. The other end of the air supply pipe extends into the base and is fixedly connected to the first housing. The fixed frame is fixedly installed inside the first housing. Multiple guide plates are fixedly installed inside the fixed frame. Multiple chip baffles are also fixedly installed on the inner walls of both sides of the fixed frame. The multiple chip baffles all penetrate the multiple guide plates. A dust collection groove is provided on the bottom inner wall of the fixed frame. A dust level sensor is fixedly installed inside the dust collection groove. The outer wall of the frame is provided with a dust discharge port on one side of the dust collection tank. The negative pressure extraction component is fixedly installed in the base. One end of the extraction tube is fixedly installed on the negative pressure extraction component. The other end of the extraction tube is fixedly connected to the outer wall of the fixed frame. One end of the exhaust pipe is fixedly installed on the outer wall of the first box away from the air supply pipe. The other end of the exhaust pipe extends to the outside of the base. The cold air exhaust pipe is located on one side of the first box. The end of the cold air exhaust pipe near the first box penetrates the first box. The cold air exhaust pipe inside the first box is meandering.

[0009] Preferably, the heat exchange switching assembly includes two heat exchange plates, two mounting plates, a first gear, and a first motor. A dust collection box is fixedly installed on one outer wall of the first housing. Both mounting plates are slidably and sealed inside the first housing, with one of the mounting plates located outside the first housing. The two heat exchange plates are respectively fixedly installed inside the two mounting plates, and each of the two heat exchange plates is provided with multiple flow ports. A rack is fixedly installed on the side of the two mounting plates that are close to each other. The first motor is fixedly installed on the top of the first housing. The first gear is fixedly installed on the output shaft of the first motor, and the first gear meshes with the two racks.

[0010] Furthermore, the plurality of guide plates are arranged in a fan shape within the fixed frame, with radial intervals between each guide plate, and the plurality of chip baffles are staggered.

[0011] Furthermore, a plurality of trapezoidal isolation strips are fixedly installed on the top inner wall of the first housing. The plurality of trapezoidal isolation strips are located on both sides of the two mounting plates, and the inner walls of the plurality of trapezoidal isolation strips are in contact with the outer walls of both sides of the two mounting plates respectively.

[0012] Furthermore, the base is also provided with a cleaning mechanism for cleaning the clumps on the surfaces of the two heat exchange plates. The cleaning mechanism includes a scraping component and a pushing component.

[0013] Preferably, the scraping assembly includes a scraper, a movable plate, a guide plate, and a limiting plate. A support frame is fixedly installed inside the base. One end of two guide rods is fixedly installed on one outer wall of the support frame. The other ends of the two guide rods are fixedly connected to the base. The movable plate is slidably installed on the two guide rods. A first spring is sleeved on the outer side of each of the two guide rods. The two ends of the two first springs are fixedly connected to the movable plate and the support frame, respectively. A second screw is rotatably installed on the top of the movable plate. The guide plate is threadedly connected to the outer side of the second screw. A third motor is fixedly installed on the bottom of the movable plate. The output shaft of the third motor is fixedly connected to the bottom end of the second screw. The limiting plate is located above the guide plate. Two guide lifting rods are fixedly installed on the bottom of the limiting plate. The bottom ends of the two guide lifting rods penetrate the guide plate and the movable plate. The scraper is fixedly installed on the bottom ends of the two guide lifting rods. A vibration motor is fixedly installed on the top of the limiting plate. One end of multiple second springs is also fixedly installed on the bottom of the limiting plate. The other ends of the multiple second springs are fixedly connected to the guide plate.

[0014] Preferably, the pushing assembly includes two second gears, two first screws, two electric levers, and a second motor. One end of each of the two first screws is rotatably mounted on the outer wall of one side of the support frame, and the other end of each of the two first screws extends outside the base. The two second gears are respectively fixedly mounted on the outer walls of the two first screws and mesh with each other. The second motor is fixedly mounted on the outer wall of one side of the base, and the output shaft of the second motor is fixedly connected to one end of one of the first screws. Sliding seats are threadedly connected to the outer sides of both first screws, and the two electric levers are respectively fixedly mounted on the tops of the two sliding seats.

[0015] Furthermore, the threads of the two first screws are arranged opposite to each other.

[0016] Compared with related technologies, the energy-saving heat recovery device for the aluminum rod hot shearing furnace provided by the present invention has the following beneficial effects: This invention provides an energy-saving heat recovery device for an aluminum rod hot shearing furnace. Through the cooperation of pretreatment components, heat exchange switching components, and internal components, multiple guide plates are arranged in a fan-shaped radial pattern within a fixed frame to uniformly divert and guide high-temperature flue gas, ensuring smooth and uniform flow. This avoids concentrated flushing of the heat exchange plates and localized areas of the cold air inlet pipe, fundamentally solving the problem of uneven heat exchange and reducing excessive dust accumulation and crusting at certain points on the heat exchange plates and in the cold air inlet pipe. Combined with staggered chip baffles, large dust particles and aluminum chips in the flue gas can be effectively intercepted. The dust collection tank and dust level sensor, along with the negative pressure extraction component, enable automatic detection and centralized discharge of dust, preventing ash accumulation and channel blockage. Finally, a sliding switching structure consisting of two heat exchange plates (main and auxiliary), gears, racks, and mounting plates allows for rapid switching between the working and cleaning positions of the heat exchange plates. This allows for heat exchange surface replacement without shutting down the furnace or interrupting heat exchange, ensuring long-term continuous operation of the waste heat recovery device. By coordinating the scraping assembly, the pushing assembly, and other internal components, the scraper mechanism can be quickly and accurately pushed to the side of the heat exchange plate to be cleaned. Under the action of the first spring, the scraper automatically adheres to the plate surface, adapting to slight deformation of the plate surface and ensuring scraping fit. With the second screw driving the scraper to move up and down, the vibration motor loosening the plated layer, and the second spring elastically pressing, the plated layer on the surface of the heat exchange plate can be scraped and cleaned. The cleaning process does not require manual operation with hand tools, thus effectively breaking and peeling off the hard plated layer on the surface of the heat exchange plate, resulting in a more thorough cleaning. Attached Figure Description

[0017] Figure 1 A schematic diagram of the first embodiment of the energy-saving heat recovery device for the aluminum rod hot shearing furnace provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 for Figure 1 The diagram shows a cross-sectional view of the heat exchange box and its base. Figure 4 for Figure 3 The diagram shows the assembly of the gas supply pipe, gas collection cylinder, connecting pipe and smoke extraction device. Figure 5 for Figure 3 The diagram shows a cross-sectional view of the base. Figure 6 for Figure 5 The diagram shows the internal structure of the base. Figure 7 for Figure 6 The diagram shows a cross-sectional view of the first housing. Figure 8 for Figure 6The diagram shows a cross-sectional view of the first housing, the fixed frame, and the mounting plate. Figure 9 for Figure 7 The diagram shows a sectional view of the fixed frame. Figure 10 for Figure 7 The diagram shows the assembly of the rack, mounting plate, and heat exchanger plate. Figure 11 This is a schematic diagram of a second embodiment of the energy-saving heat recovery device for the aluminum rod hot shearing furnace provided by the present invention. Figure 12 for Figure 11 The diagram shows a cross-sectional view of the base. Figure 13 for Figure 12 The diagram shows a partial structural assembly. Figure 14 for Figure 13 The diagram shown is a partial representation of the disassembled structure. Figure 15 for Figure 14 The diagram shows the assembly of the second screw, third motor, scraper, and guide lifting rod.

[0018] The diagram shows the following components: 1. Base; 2. Heat exchange box; 3. Air collection cylinder; 4. Air supply pipe; 5. Exhaust pipe; 6. Connecting pipe; 7. Smoke extraction device; 8. First housing; 9. Dust collection box; 10. First motor; 11. Negative pressure extraction assembly; 12. Rack; 13. Mounting plate; 14. Heat exchange plate; 15. Fixed frame; 16. Guide plate; 17. Chip baffle; 18. First gear; 19. Dust level sensor; 20. Cold air inlet pipe; 21. Second gear; 22. Second motor; 23. Vibration motor; 24. Electric lever; 25. Movable plate; 26. First spring; 27. Sliding seat; 28. Guide rod; 29. ​​First screw; 30. Limiting plate; 31. Second spring; 32. Guide plate; 33. Second screw; 34. Third motor; 35. Scraper; 36. Guide lifting rod. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] First embodiment: Please refer to the following: Figures 1-10In the first embodiment of the present invention, the energy-saving heat recovery device of the aluminum rod hot shearing heating furnace includes: a base 1, a heat exchange box 2, and multiple smoke extraction devices 7. The heat exchange box 2 is fixedly installed on the top of the base 1, and the multiple smoke extraction devices 7 are all fixedly installed on the inner wall of the top of the heat exchange box 2. A heating furnace is also provided in the base 1, and multiple heating gas pipes are fixedly installed between the heating furnace and the multiple smoke extraction devices 7. A gas collecting cylinder 3 is fixedly installed on the top of the heat exchange box 2. A waste heat recovery treatment mechanism is provided in the base 1. The waste heat recovery treatment mechanism also includes a pretreatment component and a heat exchange switching component. The pretreatment component is used to straighten and remove dust from the flue gas, and the heat exchange switching component is used to switch and alternate the main and auxiliary heat exchange plates 14.

[0021] One end of the gas collecting cylinder 3 is fixedly installed with one end of the gas supply pipe 4, and one end of the connecting pipe 6 is fixedly installed on one side of the outer wall of the multiple smoke extraction devices 7. The other ends of the multiple connecting pipes 6 extend to the outside of the heat exchange box 2 and are fixedly connected to the outer wall of the gas collecting cylinder 3.

[0022] The pretreatment assembly includes a first housing 8, a fixed frame 15, a negative pressure extraction assembly 11, and a cold air exhaust pipe 20. The first housing 8 is fixedly installed inside the base 1. The other end of the air supply pipe 4 extends into the base 1 and is fixedly connected to the first housing 8. The fixed frame 15 is fixedly installed inside the first housing 8. Multiple guide plates 16 are fixedly installed inside the fixed frame 15. The multiple guide plates 16 are arranged in a fan shape inside the fixed frame 15, and the guide plates 16 are radially spaced apart. Multiple chip baffles 17 are also fixedly installed on the inner walls of both sides of the fixed frame 15. The multiple chip baffles 17 are staggered and penetrate multiple guide plates 16. The bottom inner wall of the frame 15 is provided with a dust collection trough, and a dust level sensor 19 is fixedly installed in the dust collection trough. The outer wall of the fixed frame 15 is provided with a dust discharge port on one side of the dust collection trough. The negative pressure extraction component 11 is fixedly installed in the base 1. One end of the extraction tube is fixedly installed on the negative pressure extraction component 11, and the other end of the extraction tube is fixedly connected to the outer wall of the fixed frame 15. The flue gas first passes through the fixed frame 15. Multiple fan-shaped and radially spaced guide plates 16 evenly divide and guide the flue gas, so that the flue gas flows smoothly to the surface of the heat exchange plate 14. At this time, the staggered chip baffles 17 intercept and collide with large particles of dust and aluminum chips in the flue gas to settle. Dust falls into the dust collection trough at the bottom of the fixed frame 15 under gravity, achieving pretreatment and initial dust removal of the flue gas. When the dust in the dust collection trough accumulates to a set height, the dust level sensor 19 detects a full signal, and the negative pressure extraction component 11 is activated. The dust in the dust collection trough is extracted and collected through the extraction pipe. Multiple guide plates 16 are arranged in a fan-shaped radial pattern within the fixed frame 15, which can evenly distribute and guide the high-temperature flue gas, allowing the flue gas to flow smoothly and evenly. This avoids the flue gas concentrating on local areas of the heat exchange plate 14 and the cold air exhaust pipe 20, fundamentally solving the problem of uneven heat exchange and reducing the amount of dust accumulating at certain points on the heat exchange plate and the cold air exhaust pipe. Excessive buildup of scale, combined with staggered chip baffles 17, can effectively intercept large particles of dust and aluminum shavings in the flue gas. The dust collection tank and dust level sensor 19, together with the negative pressure extraction component 11, can realize automatic detection and centralized discharge of dust, avoiding dust accumulation and blockage of the channel. One end of the exhaust pipe 5 is fixedly installed on the outer wall of the first box 8 away from the air supply pipe 4, and the other end of the exhaust pipe 5 extends to the outside of the base 1. The cold air inlet pipe 20 is set on one side of the first box 8. The end of the cold air inlet pipe 20 near the first box 8 penetrates the first box 8. The cold air inlet pipe 20 inside the first box 8 is meandering. The low-temperature flue gas after heat exchange is completed is discharged from the exhaust pipe 5.

[0023] The heat exchange switching assembly includes two heat exchange plates 14, two mounting plates 13, a first gear 18, and a first motor 10. A dust collection box 9 is fixedly installed on one outer wall of the first housing 8. Both mounting plates 13 are slidably and sealed inside the first housing 8. Two first sealing rings are fixedly installed on the outer walls of both mounting plates 13, with one mounting plate 13 located outside the first housing 8. The two heat exchange plates 14 are fixedly installed inside the two mounting plates 13, and each heat exchange plate 14 has multiple flow ports. Multiple trapezoidal isolation strips are fixedly installed on the inner top wall of the first housing 8. The trapezoidal isolation strips are located on both sides of the two mounting plates 13, and the inner walls of the trapezoidal isolation strips contact the outer walls of both sides of the two mounting plates 13. The trapezoidal isolation strips limit and seal the mounting plates 13 to prevent flue gas from leaking from the gaps in the gear 12. Gears are fixedly installed on the sides of the two mounting plates 13 that are close to each other. 12. A first motor 10 is fixedly installed on the top of the first housing 8. A first gear 18 is fixedly installed on the output shaft of the first motor 10, and the first gear 18 meshes with two racks 12. When excessive scaling occurs on the surface of one of the heat exchange plates 14, resulting in reduced heat exchange efficiency, the first motor 10 drives the first gear 18 to rotate. The first gear 18 drives the racks 12 on both sides to move, causing the two mounting plates 13 to slide synchronously in opposite directions. This moves the scaled heat exchange plate 14 out of the heat exchange station, and another clean heat exchange plate 14 into the heat exchange station. This enables the main and auxiliary heat exchange plates 14 to work alternately and continuously. The sliding switching structure composed of the main and auxiliary heat exchange plates 14, the first gear 18, the racks 12, and the mounting plates 13 enables the rapid switching of the heat exchange plates 14 between the working station and the cleaning station. This allows for the replacement of the heat exchange surface without stopping the furnace or interrupting heat exchange, ensuring the long-term continuous operation of the waste heat recovery device.

[0024] In this embodiment: The high-temperature flue gas generated by the aluminum rod hot shearing furnace is drawn by multiple smoke extraction devices 7 at the top of the heat exchange box 2, and collected into the gas collection cylinder 3 through the connecting pipe 6. Then, it is sent into the first box 8 inside the base 1 through the gas supply pipe 4. The flue gas first passes through the fixed frame 15, and multiple fan-shaped and radially spaced guide plates 16 evenly distribute and guide the flue gas, so that the flue gas flows smoothly to the surface of the heat exchange plate 14. At this time, the staggered chip baffles 17 intercept and collide with large particles of dust and aluminum chips in the flue gas to settle. The dust falls into the collection cylinder at the bottom of the fixed frame 15 under the action of gravity. Inside the dust collection trough, flue gas pretreatment and preliminary dust removal are achieved. When the dust in the dust collection trough accumulates to a set height, the dust level sensor 19 detects a full material signal, and the negative pressure extraction component 11 is activated. The dust in the dust collection trough is extracted and collected through the extraction pipe. The pretreated flue gas passes through the flow port on the heat exchange plate 14 and enters the heat exchange area in the first box 8. It undergoes indirect heat exchange with the cold air inlet pipe 20. At the same time, the cold air inlet pipe 20 sends cold air into the first box 8. The cold air absorbs heat to form preheated air, which flows back to the heating furnace to assist combustion and realize waste heat recovery. When excessive scaling on one of the heat exchange plates 14 reduces heat exchange efficiency, the first motor 10 drives the first gear 18 to rotate. The first gear 18 drives the racks 12 on both sides to move, causing the two mounting plates 13 to slide synchronously in opposite directions. This removes the scaled heat exchange plate 14 from the heat exchange station, while another clean heat exchange plate 14 moves into the heat exchange station. This allows the main and auxiliary heat exchange plates 14 to work alternately and continuously. The trapezoidal isolation strip on the inner wall of the first housing 8 limits and seals the mounting plates 13, preventing flue gas from leaking from the gaps in the racks 12. The low-temperature flue gas after heat exchange is completed is discharged through the exhaust pipe 5.

[0025] Second embodiment: The second embodiment of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figures 11-15 In the energy-saving heat recovery device of the aluminum rod hot shear heating furnace provided in this embodiment, the base 1 is also provided with a cleaning mechanism for cleaning the slab layer on the surface of the two heat exchange plates 14. The cleaning mechanism includes a scraping component and a pushing component.

[0027] The scraping assembly includes a scraper 35, a movable plate 25, a guide plate 32, and a limiting plate 30. A support frame is fixedly installed inside the base 1. One end of two guide rods 28 is fixedly installed on one side of the outer wall of the support frame. The other ends of the two guide rods 28 are fixedly connected to the base 1. The movable plate 25 is slidably mounted on the two guide rods 28. Guide ears are fixedly installed at both ends of the movable plate 25. The movable plate 25 is slidably mounted on the two guide rods 28 through the two guide ears. Contact posts are fixedly installed on the top of the two guide ears. The subsequent electric lever 24 achieves the desired effect by contacting the contact posts. The movable plate 25 is moved by pushing it. Two guide rods 28 are each fitted with a first spring 26 on their outer sides. The two ends of the first springs 26 are fixedly connected to the movable plate 25 and the support frame, respectively. A second screw 33 is rotatably mounted on the top of the movable plate 25. A guide plate 32 is threadedly connected to the outer side of the second screw 33. A third motor 34 is fixedly mounted on the bottom of the movable plate 25. The output shaft of the third motor 34 is fixedly connected to the bottom end of the second screw 33. A limiting plate 30 is located above the guide plate 32. Two guide lifting rods 36 are fixedly mounted on the bottom of the limiting plate 30. The bottom ends of the lifting rods 36 all penetrate the guide plate 32 and the movable plate 25. The scraper 35 is fixedly installed at the bottom ends of the two guide lifting rods 36, and rollers are rotatably installed at both ends of the scraper 35. The outer wall of the rollers contacts one side of the outer wall of the mounting plate 13. A vibration motor 23 is fixedly installed at the top of the limiting plate 30, and one end of a plurality of second springs 31 is fixedly installed at the bottom of the limiting plate 30. The other ends of the plurality of second springs 31 are fixedly connected to the guide plate 32. When the movable plate 25 and the scraper 35 are pushed to one side of the heat exchange plate 14 to be cleaned, the elasticity of the first spring 26 is activated. When in use, the scraper 35 will always stick to the surface of the heat exchange plate 14, adapting to slight deformation of the plate surface and ensuring the scraping fit. The third motor 34 is started, which drives the second screw 33 to rotate, causing the guide plate 32, guide lifting rod 36 and scraper 35 to move downward along the surface of the heat exchange plate 14 to scrape and clean the plated layer. The vibration motor 23 at the top of the limit plate 30 works synchronously, driving the scraper 35 to vibrate and loosen and break the hard plated layer. The cleaning process does not require manual operation with hand tools, thus effectively breaking and peeling off the hard plated layer on the surface of the heat exchange plate 14, and cleaning more thoroughly.

[0028] The jacking assembly includes two second gears 21, two first screws 29, two electric levers 24, and a second motor 22. One end of each of the two first screws 29 is rotatably mounted on the outer wall of one side of the support frame, and the other end of each of the two first screws 29 extends beyond the base 1. The two second gears 21 are respectively fixedly mounted on the outer walls of the two first screws 29 and mesh with each other. The second motor 22 is fixedly mounted on the outer wall of one side of the base 1, and the output shaft of the second motor 22 is fixedly connected to one end of one of the first screws 29. Sliding seats are threadedly connected to the outer sides of both first screws 29. 27. The threads of the two first screws 29 are arranged in opposite directions. The two electric levers 24 are respectively fixedly installed on the top of the two sliding seats 27. The second motor 22 drives one of the first screws 29 to rotate. Through two meshing second gears 21, the two first screws 29 with opposite threads rotate synchronously, driving the two sliding seats 27 and the electric levers 24 on the top to move. This pushes the movable plate 25 and the scraper 35 to one side of the heat exchange plate 14 to be cleaned, so as to quickly and accurately push the scraping component to one side of the heat exchange plate 14 to be cleaned, making it convenient for the scraping component to clean the slab layer on the surface of the heat exchange plate 14.

[0029] In this embodiment: After prolonged use, a hardened layer will form on the surface of the heat exchange plate 14. When cleaning is required, the cleaning mechanism is activated. The second motor 22 drives one of the first screws 29 to rotate. Through two meshing second gears 21, the two opposing first screws 29 rotate synchronously, driving the two sliding seats 27 and the electric lever 24 at the top to move. This pushes the movable plate 25 and scraper 35 to one side of the heat exchange plate 14 to be cleaned. Then, the electric lever 24 is activated to stop pushing the movable plate 25. Under the elastic action of the first spring 26, the scraper 35 will always stick to the surface of the heat exchange plate 14. The third motor 34 is activated, driving the second screw 33 to rotate. This causes the guide plate 32, guide lifting rod 36, and scraper 35 to move downwards along the surface of the heat exchange plate 14 to scrape and clean the hardened layer. The vibration motor 23 at the top of the limiting plate 30 works synchronously, causing the scraper 35 to vibrate and loosen and break the hardened layer. The second spring 31 keeps the scraper 35 elastically pressed to ensure the scraping effect.

[0030] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An energy-saving heat recovery device for an aluminum rod hot shearing furnace, comprising: The base (1), heat exchange box (2), and multiple smoke extraction devices (7) are provided. The heat exchange box (2) is fixedly installed on the top of the base (1), and the multiple smoke extraction devices (7) are all fixedly installed on the inner wall of the top of the heat exchange box (2). The heat exchange box (2) is characterized in that a gas collection cylinder (3) is fixedly installed on the top of the heat exchange box (2), and a waste heat recovery treatment mechanism is provided inside the base (1). The waste heat recovery treatment mechanism also includes a pretreatment component and a heat exchange switching component. The pretreatment component is used to straighten and remove dust from the flue gas, and the heat exchange switching component is used to switch the main and auxiliary heat exchange plates and use them alternately.

2. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 1, characterized in that, One end of the gas collecting cylinder (3) is fixedly installed with one end of the gas supply pipe (4), and one end of the connecting pipe (6) is fixedly installed on one side of the outer wall of the multiple smoke extraction devices (7). The other end of the multiple connecting pipes (6) extends to the outside of the heat exchange box (2) and is fixedly connected to the outer wall of the gas collecting cylinder (3).

3. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 2, characterized in that, The pretreatment component includes a first housing (8), a fixed frame (15), a negative pressure extraction component (11), and a cold air exhaust pipe (20). The first housing (8) is fixedly installed inside the base (1). The other end of the air supply pipe (4) extends into the base (1) and is fixedly connected to the first housing (8). The fixed frame (15) is fixedly installed inside the first housing (8). Multiple guide plates (16) are fixedly installed inside the fixed frame (15). Multiple chip baffles (17) are also fixedly installed on the inner walls of both sides of the fixed frame (15). The multiple chip baffles (17) all penetrate the multiple guide plates (16). A dust collection trough is provided on the bottom inner wall of the fixed frame (15). A dust level sensor (19) is fixedly installed inside the dust collection trough. The outer wall of the fixed frame (15) is provided with a dust discharge port on one side of the dust collection tank. The negative pressure extraction component (11) is fixedly installed in the base (1). One end of the extraction tube is fixedly installed on the negative pressure extraction component (11). The other end of the extraction tube is fixedly connected to the outer wall of the fixed frame (15). One end of the exhaust pipe (5) is fixedly installed on the outer wall of the first box (8) away from the air supply pipe (4). The other end of the exhaust pipe (5) extends to the outside of the base (1). The cold air inlet pipe (20) is located on one side of the first box (8). The end of the cold air inlet pipe (20) close to the first box (8) penetrates the first box (8). The cold air inlet pipe (20) located in the first box (8) is meandering.

4. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 3, characterized in that, The heat exchange switching assembly includes two heat exchange plates (14), two mounting plates (13), a first gear (18), and a first motor (10). A dust collection box (9) is fixedly installed on one side of the outer wall of the first housing (8). The two mounting plates (13) are both sealed and slidably installed inside the first housing (8), and one of the mounting plates (13) is located outside the first housing (8). The two heat exchange plates (14) are respectively fixedly installed inside the two mounting plates (13), and the two heat exchange plates (14) are provided with multiple flow ports. A rack (12) is fixedly installed on the side of the two mounting plates (13) that are close to each other. The first motor (10) is fixedly installed on the top of the first housing (8). The first gear (18) is fixedly installed on the output shaft of the first motor (10), and the first gear (18) meshes with the two racks (12).

5. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 3, characterized in that, The plurality of guide plates (16) are arranged in a fan shape within the fixed frame (15), with radial intervals between each guide plate (16), and the plurality of chip baffles (17) are staggered.

6. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 4, characterized in that, Multiple trapezoidal isolation strips are fixedly installed on the top inner wall of the first box (8). The multiple trapezoidal isolation strips are located on both sides of the two mounting plates (13), and the inner walls of the multiple trapezoidal isolation strips are in contact with the outer walls of both sides of the two mounting plates (13).

7. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 4, characterized in that, The base (1) is also provided with a cleaning mechanism for cleaning the clumps on the surfaces of the two heat exchange plates (14). The cleaning mechanism includes a scraping component and a pushing component.

8. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 7, characterized in that, The scraping assembly includes a scraper (35), a movable plate (25), a guide plate (32), and a limiting plate (30). A support frame is fixedly installed inside the base (1). One end of two guide rods (28) is fixedly installed on one side of the outer wall of the support frame. The other end of the two guide rods (28) is fixedly connected to the base (1). The movable plate (25) is slidably installed on the two guide rods (28). A first spring (26) is sleeved on the outer side of each of the two guide rods (28). The two ends of the two first springs (26) are fixedly connected to the movable plate (25) and the support frame, respectively. A second screw (33) is rotatably installed on the top of the movable plate (25). The guide plate (32) is threadedly connected to the outer side of the second screw (33). A third motor (34) is fixedly installed at the bottom of the second screw (33). The output shaft of the third motor (34) is fixedly connected to the bottom end of the second screw (33). The limiting plate (30) is located above the guide plate (32). Two guide lifting rods (36) are fixedly installed at the bottom of the limiting plate (30). The bottom ends of the two guide lifting rods (36) pass through the guide plate (32) and the movable plate (25). The scraper (35) is fixedly installed at the bottom ends of the two guide lifting rods (36). A vibration motor (23) is fixedly installed at the top of the limiting plate (30). One end of a plurality of second springs (31) is also fixedly installed at the bottom of the limiting plate (30). The other ends of the plurality of second springs (31) are fixedly connected to the guide plate (32).

9. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 8, characterized in that, The push assembly includes two second gears (21), two first screws (29), two electric levers (24), and a second motor (22). One end of each of the two first screws (29) is rotatably mounted on the outer wall of one side of the support frame, and the other end of each of the two first screws (29) extends to the outside of the base (1). The two second gears (21) are respectively fixedly mounted on the outer wall of the two first screws (29) and mesh with each other. The second motor (22) is fixedly mounted on the outer wall of one side of the base (1), and the output shaft of the second motor (22) is fixedly connected to one end of one of the first screws (29). The outer sides of each of the two first screws (29) are threaded with sliding seats (27), and the two electric levers (24) are respectively fixedly mounted on the top of the two sliding seats (27).

10. The energy-saving heat recovery device for the aluminum rod hot shearing heating furnace according to claim 9, characterized in that, The threads of the two first screws (29) are arranged opposite each other.

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