A spiral pipe waste heat recycling equipment of a large tea baking machine

Abstract

The application discloses a spiral pipe waste heat recovery and recycling equipment of a large tea baking machine, and relates to the field of waste heat recovery and recycling.The equipment comprises an equipment main body, an air inlet and an air outlet, a plurality of cleaning blocks are movably installed on the outer walls of the spiral pipe main bodies, the cleaning blocks adopt arc structures matched with the arc and gap of the spiral fin outer walls of the spiral pipe main bodies, a plurality of movable rings are movably arranged on the outer walls of the spiral pipe main bodies, and one end of each of the movable rings is connected with a cleaning block. The movable rings and the cleaning blocks are arranged, when the movable rings are displaced, the cleaning blocks are driven to be displaced, under the guidance and limiting action of the spiral fins of the spiral pipe main bodies, the cleaning blocks adhering to the fins are adapted to rotate and slide along the spiral tracks of the fins, the cleaning blocks scrape and clean the spiral fins, the cleanliness of the heat exchange surface of the spiral pipe is continuously ensured, the problems of heat exchange efficiency attenuation, equipment aging and mildew caused by dirt blockage are avoided, and long-term stable and efficient operation of the equipment is ensured.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and reuse, specifically to a spiral tube waste heat recovery and reuse device for a large tea roasting machine. Background Technology

[0002] The large-scale continuous tunnel chain-plate tea roasting machine is a core piece of equipment for large-scale, automated tea processing in modern tea factories. It is primarily suitable for the continuous dehydration, roasting, shaping, and aroma enhancement of bulk teas such as black tea, green tea, and white tea. The equipment features a tunnel-type box structure, coupled with a food-grade stainless steel chain conveyor system. This allows for integrated, uniform, continuous feeding, roasting, and discharging of tea leaves, completely eliminating the limitations of traditional intermittent roasting. It boasts high production efficiency and stable finished product quality. The machine's core heating system incorporates an external hot air furnace and stainless steel spiral heat exchange coils, utilizing spiral turbulence... The heat exchange principle significantly improves heat exchange efficiency, producing clean hot air. Combined with the zoned air duct circulation within the chamber, this ensures even heating and dehumidification of the tea leaves, effectively avoiding problems such as uneven drying and scorching or off-flavors. The equipment is equipped with an intelligent temperature control and variable frequency speed regulation system, which can flexibly adjust the roasting temperature and conveying speed according to the type of tea and its moisture content, adapting to different tea-making process requirements. The entire machine has a clean and corrosion-resistant structure with a low failure rate, meeting the food safety production standards for tea. It is widely used in standardized mass production in large and medium-sized tea factories, effectively reducing labor costs and improving the consistency and quality of the roasted tea products.

[0003] The spiral tube waste heat recovery and reuse equipment is a core energy-saving supporting device for continuous tunnel chain plate roasting machines. Relying on the high-efficiency heat exchange characteristics of stainless steel spiral heat exchange coils, it is optimized to address the waste heat waste problem in the tea roasting process. It is widely applicable to the automated mass production operations of large and medium-sized tea factories. By recovering waste heat through the spiral tube heat exchange structure, it preheats the fresh air entering the equipment, reduces the heating load of the hot air furnace, and significantly reduces fuel and electricity consumption. At the same time, the waste heat can be used to pre-spread and dehumidify the tea leaves to be processed, shortening the roasting heating time and processing cycle, and improving production efficiency. In addition, the waste heat closed-loop recovery mode can reduce the exhaust temperature of the equipment, reduce heat loss, stabilize the roasting temperature inside the oven, and avoid problems such as uneven drying and mixed aroma caused by excessive temperature difference in the tea leaves. It has multiple functions of energy saving, quality improvement and efficiency enhancement, and environmental protection and emission reduction.

[0004] In the existing technology, heat exchange fins are set on the outer wall of the spiral tube. The gap between the fins is narrow. The tar and tea dust generated during the tea roasting process can easily adhere and accumulate between the fins. Over time, the accumulation will cover the heat exchange contact surface of the spiral tube and block the ventilation and heat exchange channels, which will significantly reduce the efficiency of heat exchange and waste heat recovery. The accumulated material is difficult to clean completely and requires regular shutdown for maintenance and cleaning, which will interrupt the continuous mass production rhythm of the equipment. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a spiral tube waste heat recovery and reuse device for a large tea roasting machine, so as to solve the technical problems in the background art mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spiral tube waste heat recovery and reuse device for a large tea roasting machine, comprising a main body, an air inlet and an air outlet, wherein an air inlet is provided at one end of the main body and an air outlet is provided at the other end of the main body; The main body of the equipment is equipped with multiple sets of spiral tube bodies, and the outer walls of the multiple sets of spiral tube bodies are each attached with multiple sets of spiral fins. An air inlet pipe and an air outlet pipe are respectively installed on both sides of the main body of the equipment. One end of the multiple sets of spiral tube bodies extending to the outer wall of one side of the main body of the equipment is connected to the air inlet pipe, and the other end of the multiple sets of spiral tube bodies extending to the outer wall of the other side of the main body of the equipment is connected to the air outlet pipe. Cleaning blocks are movably installed on the outer walls of multiple sets of spiral tube bodies, and the cleaning blocks adopt an arc-shaped structure that matches the curvature and gap of the fins on the outer walls of the spiral tube bodies. Movable rings are movably sleeved on the outer walls of multiple sets of spiral tube bodies, and one end of each set of movable rings is connected to multiple sets of cleaning blocks. Limiting shafts are movably installed inside the main body of the equipment, and multiple sets of movable rings are movably connected to multiple sets of limiting shafts.

[0007] By adopting the above technical solution, the cleaning block adopts an arc-shaped structure that matches the curvature and gap of the outer wall fins of the spiral tube. It is fitted and sleeved on the outside of the spiral tube body. When the movable ring moves, it drives the cleaning block to move. Under the guidance and limiting effect of the spiral fins on the outer wall of the spiral tube body, the cleaning block fitted to the fins will adaptively rotate and slide along the spiral trajectory of the fins. The cleaning block scrapes and cleans the spiral fins, continuously ensuring the cleanliness of the spiral tube heat exchange surface, avoiding problems such as heat exchange efficiency reduction, equipment aging and mold growth caused by scale buildup and blockage, and ensuring long-term stable and efficient operation of the equipment.

[0008] The present invention is further configured such that a drive motor is mounted on the outer wall of the main body of the device, and one set of limiting shafts extends to one end of the outer wall of the main body of the device and is connected to the output end of the drive motor.

[0009] Preferably, the drive motor is started, which drives a set of limit shafts to rotate.

[0010] The present invention is further configured such that each of the multiple sets of limiting shafts is equipped with a sprocket at one end, and the multiple sets of sprockets are connected by a chain line.

[0011] Preferably, a set of limiting shafts rotates, and each of the multiple sets of limiting shafts has a sprocket at one end. The multiple sets of sprockets are connected by chains, and the multiple sets of limiting shafts rotate synchronously.

[0012] The present invention is further configured such that multiple sets of sleeves are installed inside the main body of the device, and the multiple sets of sleeves are respectively fitted onto the outer ends of multiple sets of limiting shafts. Each set of sleeves has a support plate installed at its bottom end, and the opening ends of the multiple sets of support plates are inclined and face away from the air inlet.

[0013] Preferably, multiple sets of sleeves protect the outer walls of multiple sets of limiting shafts, and multiple sets of support plates face away from the air inlet to reduce the entry of impurities in the flue gas into the sleeve from the support plate ends.

[0014] The present invention is further configured such that the outer walls of the multiple sets of limiting shafts are provided with reciprocating thread grooves, the outer walls of the multiple sets of limiting shafts are movably mounted with limiting rings, and the inner walls of the multiple sets of limiting rings are provided with protrusions that are movably connected to the inner walls of the reciprocating thread grooves.

[0015] Preferably, multiple sets of limiting shafts rotate synchronously, and the reciprocating threaded grooves on the outer walls of the multiple sets of limiting shafts move with the protrusions on the inner walls of the multiple sets of limiting rings, so the multiple sets of limiting rings reciprocate.

[0016] The present invention is further configured such that a connecting plate is installed at the bottom end of each of the multiple sets of limiting rings, and the outer wall of each of the multiple sets of connecting plates is movably connected to the inner wall of each of the multiple sets of support plates, and an installation block is installed at one end of each of the multiple sets of connecting plates.

[0017] Preferably, multiple sets of limiting rings move back and forth, thereby driving multiple sets of connecting plates to move, and in turn driving multiple sets of mounting blocks to move.

[0018] The present invention is further configured such that the outer walls of the multiple sets of movable rings are symmetrically provided with sliding grooves, the outer walls of the multiple sets of mounting blocks are symmetrically provided with arc-shaped blocks, and the outer walls of the multiple sets of arc-shaped blocks are respectively movably connected to the inner walls of the multiple sets of sliding grooves.

[0019] Preferably, multiple sets of mounting blocks are displaced, which in turn causes multiple sets of arc-shaped blocks to be displaced, thereby causing multiple sets of movable rings to be displaced.

[0020] The present invention is further configured such that each of the multiple sets of movable rings has an opening at one end, and the length of each of the multiple sets of arc-shaped blocks is greater than the length of the opening at one end of the multiple sets of movable rings.

[0021] Preferably, the length of the multiple sets of arc-shaped blocks is greater than the length of the open end of the movable ring, so that one end of each set of arc-shaped blocks is always placed inside the multiple sets of sliding grooves, thus avoiding the possibility of the multiple sets of movable rings falling off.

[0022] The present invention is further configured such that the multiple sets of the active rings are staggered.

[0023] Preferably, this avoids the impurities that fall off from multiple sets of movable rings falling onto the outer wall of the lower set of movable rings, thus reducing the accumulation of impurities on the outer wall of the movable rings.

[0024] The present invention is further configured such that a collection box is movably installed inside the main body of the device, and one end of the collection box extends to the outer wall of the main body of the device.

[0025] Preferably, the cleaned impurities eventually fall into the collection box, and after production is completed, the staff only needs to disassemble the collection box to complete the impurity cleaning.

[0026] In summary, the present invention has the following main beneficial effects: 1. This invention solves the problem of cleaning the outer wall fins of a spiral tube by incorporating a movable ring and a cleaning block. The cleaning block adopts an arc-shaped structure that matches the curvature and gap of the outer wall fins of the spiral tube and fits snugly on the outside of the spiral tube body. When the movable ring moves, it drives the cleaning block to move as well. Guided and limited by the spiral fins on the outer wall of the spiral tube body, the cleaning block fitted to the fins will adaptively rotate and slide along the spiral trajectory of the fins. The cleaning block scrapes and cleans the spiral fins, continuously ensuring the cleanliness of the spiral tube heat exchange surface and avoiding problems such as heat exchange efficiency reduction, equipment aging and mold growth caused by scale buildup and blockage, thus ensuring long-term stable and efficient operation of the equipment.

[0027] 2. This invention incorporates an arc-shaped block, a movable ring, and a sliding groove. The effective length of the arc-shaped block is greater than the length of the open end of the movable ring, and the arc-shaped block is always nested and slidably assembled inside the sliding groove, forming a full-range sliding limit constraint structure for the movable ring. The sliding limit cooperation between the arc-shaped block and the sliding groove prevents the movable ring from shifting, loosening, or falling off during rotation, ensuring that the movable ring is always in a stable working position. The structural limit is reliable, significantly improving the overall operational stability and durability of the self-cleaning mechanism, and reducing the frequency of equipment failures and subsequent maintenance costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main body of the device in this invention; Figure 2 This is a schematic diagram of the drive motor in this invention; Figure 3 This is a schematic diagram of the internal structure of the main body of the device in this invention; Figure 4 This is a schematic diagram of the collection box in this invention; Figure 5 This is a schematic diagram of the spiral tube body in this invention; Figure 6 This is a schematic diagram of the sleeve in this invention; Figure 7 This is a planar view of the active ring in this invention; Figure 8 This is a schematic diagram of the groove in the present invention.

[0029] Explanation of reference numerals in the attached figures: 1. Equipment body; 2. Air inlet; 3. Air outlet; 4. Air inlet pipe; 5. Spiral tube body; 6. Air outlet pipe; 7. Drive motor; 8. Sleeve; 9. Support plate; 10. Limiting shaft; 11. Sprocket; 12. Chain; 13. Limiting ring; 14. Connecting plate; 15. Mounting block; 16. Arc block; 17. Movable ring; 18. Cleaning block; 19. Slide groove; 20. Collection box. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The embodiments of the present invention will now be described.

[0032] Please refer to the spiral tube waste heat recovery and reuse equipment for a large tea roasting machine. Figure 1 - Figure 8 It includes a main body 1, an air inlet 2 and an air outlet 3. The main body 1 has an air inlet 2 at one end and an air outlet 3 at the other end. The main body 1 of the equipment is equipped with multiple sets of spiral tube bodies 5, and the outer walls of the multiple sets of spiral tube bodies 5 are each attached with multiple sets of spiral fins. The main body 1 of the equipment is equipped with an air inlet pipe 4 and an air outlet pipe 6 on both sides. The ends of the multiple sets of spiral tube bodies 5 extending to the outer wall of one side of the main body 1 are all connected to the air inlet pipe 4, and the other ends of the multiple sets of spiral tube bodies 5 extending to the outer wall of the other side of the main body 1 are all connected to the air outlet pipe 6. Cleaning blocks 18 are movably installed on the outer walls of multiple sets of spiral tube bodies 5. The cleaning blocks 18 adopt an arc-shaped structure that matches the curvature and gap of the fins on the outer walls of the spiral tube bodies 5. Movable rings 17 are movably fitted on the outer walls of multiple sets of spiral tube bodies 5. One end of each set of movable rings 17 is connected to a set of cleaning blocks 18. Limiting shafts 10 are movably installed inside the main body 1 of the equipment. The movable rings 17 are movably connected to the limiting shafts 10. When the movable rings 17 are displaced, they drive the cleaning blocks 18 to be displaced. Under the guiding and limiting effect of the spiral fins on the outer walls of the spiral tube bodies 5, the cleaning blocks 18 that are in contact with the fins will adaptively rotate and slide along the spiral trajectory of the fins. The cleaning blocks 18 scrape and clean the spiral fins.

[0033] Please see Figure 2 - Figure 4 A drive motor 7 is mounted on the outer wall of the main body 1, and one set of limiting shafts 10 extends to one end of the outer wall of the main body 1 and is connected to the output end of the drive motor 7. When the drive motor 7 starts, it drives the set of limiting shafts 10 to rotate.

[0034] Please see Figure 3 - Figure 5 Each of the multiple sets of limiting shafts 10 has a sprocket 11 installed at one end, and the multiple sets of sprockets 11 are connected by chains 12. When one set of limiting shafts 10 rotates, the multiple sets of limiting shafts 10 have a sprocket 11 installed at one end, and the multiple sets of sprockets 11 are connected by chains 12, and the multiple sets of limiting shafts 10 rotate synchronously.

[0035] Please see Figure 3 - Figure 7 The main body 1 of the equipment is equipped with multiple sets of sleeves 8, which are respectively fitted onto the outer ends of multiple sets of limiting shafts 10. Each set of sleeves 8 has a support plate 9 installed at its bottom end. The opening ends of the support plates 9 are all inclined and face away from the air inlet 2. The multiple sets of sleeves 8 protect the outer walls of the multiple sets of limiting shafts 10, and the support plates 9 face away from the air inlet 2, reducing the entry of impurities in the flue gas into the sleeves 8 from the end of the support plate 9.

[0036] Please see Figure 6 - Figure 8 The outer walls of multiple sets of limiting shafts 10 are provided with reciprocating threaded grooves, and the outer walls of multiple sets of limiting shafts 10 are movably mounted with limiting rings 13. The inner walls of multiple sets of limiting rings 13 are provided with protrusions that are movably connected to the inner walls of the reciprocating threaded grooves. The multiple sets of limiting shafts 10 rotate synchronously, and the reciprocating threaded grooves on the outer walls of the multiple sets of limiting shafts 10 move with the protrusions on the inner walls of the multiple sets of limiting rings 13 respectively, so the multiple sets of limiting rings 13 move back and forth.

[0037] Please see Figure 7 - Figure 8 Each of the multiple sets of limiting rings 13 has a connecting plate 14 installed at its bottom end, and the outer walls of the multiple sets of connecting plates 14 are movably connected to the inner walls of the multiple sets of support plates 9. Each of the multiple sets of connecting plates 14 has an installation block 15 installed at one end. The multiple sets of limiting rings 13 move back and forth, thereby driving the multiple sets of connecting plates 14 to move, and in turn driving the multiple sets of installation blocks 15 to move.

[0038] Please see Figure 7 - Figure 8 Multiple sets of movable rings 17 have symmetrically opened grooves 19 on their outer walls, and multiple sets of mounting blocks 15 have symmetrically installed arc-shaped blocks 16 on their outer walls. The outer walls of multiple sets of arc-shaped blocks 16 are movably connected to the inner walls of multiple sets of grooves 19. When multiple sets of mounting blocks 15 are displaced, they drive multiple sets of arc-shaped blocks 16 to be displaced, thereby driving multiple sets of movable rings 17 to be displaced.

[0039] Please see Figure 7 - Figure 8 Each of the multiple sets of movable rings 17 has an opening at one end, and the length of each of the multiple sets of arc blocks 16 is greater than the length of the opening at one end of the multiple sets of movable rings 17. The length of each of the multiple sets of arc blocks 16 is greater than the length of the opening end of the movable rings 17, so that one end of each of the multiple sets of arc blocks 16 is always placed inside the multiple sets of sliding grooves 19, thus preventing the multiple sets of movable rings 17 from falling off.

[0040] Please see Figure 3 - Figure 5 The multiple sets of movable rings 17 are staggered to prevent impurities from falling off the multiple sets of movable rings 17 from falling onto the outer wall of the lower set of movable rings 17, thus reducing the accumulation of impurities on the outer wall of the movable rings 17.

[0041] Please see Figure 1 - Figure 4 A collection box 20 is installed inside the main body 1 of the equipment, and one end of the collection box 20 extends to the outer wall of the main body 1 of the equipment. The cleaned impurities eventually fall into the collection box 20. After production is completed, the staff only needs to disassemble the collection box 20 to complete the impurity cleaning.

[0042] The working principle of this invention is as follows: During the formal operation of the tea roasting equipment, the roasting machine continuously generates a large amount of high-temperature flue gas, which contains residual roasting heat, trace amounts of tea dust, and coking tar impurities. Under the negative pressure of the equipment, the high-temperature flue gas is smoothly introduced into the sealed heat exchange chamber of the main body 1 of the equipment through the preset air inlet 2. The sealed chamber structure can effectively lock in the heat of the flue gas, avoid residual heat leakage and loss, and ensure heat exchange efficiency. The spiral finned structure of the multiple sets of spiral tubes 5 greatly increases the heat exchange contact area. During the process of the high-temperature flue gas flowing around the spiral tubes 5 inside the chamber, the residual heat in the flue gas is efficiently transferred to the tube wall and finned structure of the spiral tubes 5 through the dual principles of heat conduction and heat convection, realizing the rapid adsorption and storage of residual heat in the flue gas. Meanwhile, ambient temperature fresh air is uniformly introduced into the hollow internal channels of multiple spiral tube bodies 5 through the air inlet pipe 4 at the side of the equipment. The fresh air flows at a uniform speed inside the spiral tubes, making full contact with the high-temperature waste heat adsorbed on the tube walls and continuously exchanging heat, gradually raising the temperature to form high-temperature fresh air. After sufficient heat exchange, the high-temperature fresh air is stably discharged from the equipment body 1 through the air outlet pipe 6, and can be directly delivered to the roasting hot air furnace or tea pretreatment station. On the one hand, this effectively reduces the secondary heating load of the hot air furnace, significantly reduces the fuel consumption and electricity consumption required for the hot air furnace to heat up, and significantly reduces the tea roasting... On the one hand, it reduces the production cost of roasting. On the other hand, the preheated fresh air can be directly used for the pre-spreading, dehumidification, and withering pretreatment of the tea leaves to be processed. By utilizing the characteristics of the residual heat, which is mild and has a uniform air volume, it can quickly remove the free moisture on the surface of the tea leaves, effectively shorten the preheating time in the early stage of tea roasting, simplify the tea processing steps, greatly reduce the overall production cycle, and significantly improve the overall production efficiency and finished product processing stability of tea roasting. The low-temperature purified flue gas after heat exchange is finally discharged through the air outlet 3. Compared with the traditional direct exhaust method, the overall heat energy utilization rate is greatly improved. When the flue gas enters the main body 1 of the equipment, the flue gas tar and tea dust are easily attached and accumulated between the fins on the outer wall of the spiral tube body 5. The operator starts the drive motor 7, which drives a set of limit shafts 10 to rotate. Each of the multiple sets of limit shafts 10 has a sprocket 11 at one end, and the multiple sets of sprockets 11 are connected by chains 12. The multiple sets of limit shafts 10 rotate synchronously. The reciprocating thread grooves on the outer wall of the multiple sets of limit shafts 10 move with the protrusions on the inner wall of the multiple sets of limit rings 13, so the multiple sets of limit rings 13 move back and forth, thereby driving the multiple sets of connecting plates 14 to move, which in turn drives the multiple sets of mounting blocks 15 to move, and then drives the multiple sets of arc blocks 16 to move. When multiple sets of arc-shaped blocks 16 are displaced, they drive multiple sets of movable rings 17 to be displaced, thereby driving multiple sets of cleaning blocks 18 to be displaced. The multiple sets of cleaning blocks 18 have an arc-shaped structure that adapts to the spiral fins on the outer wall of the spiral tube body 5, and the cleaning contact surface fits the curvature and gap size of the fins, which can completely fit the surface and gaps of the spiral fins, achieving cleaning without dead angles. As the multiple sets of movable rings 17 move laterally, under the guiding and limiting effect of the spiral fins on the outer wall of the spiral tube body 5, the cleaning blocks 18 that fit the fins will adaptively rotate and slide along the spiral trajectory of the fins, thereby driving the movable rings 17 to rotate. During the cleaning process of the cleaning block 18 on the outer wall of the spiral fins, some impurities will fall onto the inner wall of the movable ring 17. As the movable ring 17 rotates, after the open end of the movable ring 17 moves to the lower area of ​​the movable ring 17, the impurities will fall from the open end of the movable ring 17. Moreover, the length of the multiple sets of arc-shaped blocks 16 is greater than the length of the open end of the movable ring 17, so that one end of the multiple sets of arc-shaped blocks 16 is always placed inside the multiple sets of sliding grooves 19, avoiding the situation where the multiple sets of movable rings 17 fall off. The cleaned impurities eventually fall into the collection box 20. After the production is completed, the staff only needs to disassemble the collection box 20 to complete the impurity cleaning. The operation is convenient and efficient, and the entire process realizes online cleaning of the equipment and automatic collection of impurities. There is no need to stop the machine and it does not affect the continuous production of tea roasting.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A spiral tube waste heat recovery and reuse device for a large tea roasting machine, comprising a main body (1), an air inlet (2), and an air outlet (3), characterized in that: The main body of the equipment (1) has an air inlet (2) at one end and an air outlet (3) at the other end. The main body (1) of the equipment is equipped with multiple sets of spiral tube bodies (5), and the outer walls of the multiple sets of spiral tube bodies (5) are each attached with multiple sets of spiral fins. The main body (1) of the equipment is equipped with an air inlet pipe (4) and an air outlet pipe (6) on both sides. The ends of the multiple sets of spiral tube bodies (5) extending to the outer wall of one side of the main body (1) are connected to the air inlet pipe (4), and the ends of the multiple sets of spiral tube bodies (5) extending to the outer wall of the other side of the main body (1) are connected to the air outlet pipe (6). Cleaning blocks (18) are movably installed on the outer walls of multiple sets of spiral tube bodies (5), and the cleaning blocks (18) adopt an arc-shaped structure that matches the curvature and gap of the fins on the outer walls of the spiral tube bodies (5). Movable rings (17) are movably sleeved on the outer walls of multiple sets of spiral tube bodies (5), and one end of each set of movable rings (17) is connected to multiple sets of cleaning blocks (18). Limiting shafts (10) are movably installed inside the equipment body (1), and multiple sets of movable rings (17) are movably connected to multiple sets of limiting shafts (10).

2. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 1, characterized in that: The outer wall of the main body (1) of the equipment is equipped with a drive motor (7), and one set of limiting shafts (10) extends to one end of the outer wall of the main body (1) and is connected to the output end of the drive motor (7).

3. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 22, characterized in that: Each of the multiple sets of limiting shafts (10) is equipped with a sprocket (11) at one end, and the multiple sets of sprockets (11) are connected by a chain (12).

4. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 1, characterized in that: The main body (1) of the equipment is equipped with multiple sets of sleeves (8), and the multiple sets of sleeves (8) are respectively fitted onto the outer ends of multiple sets of limiting shafts (10). The bottom ends of the multiple sets of sleeves (8) are all equipped with support plates (9), the opening ends of the multiple sets of support plates (9) are all inclined, and the opening ends of the multiple sets of support plates (9) face away from the air inlet (2).

5. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 4, characterized in that: The outer walls of the multiple sets of limiting shafts (10) are provided with reciprocating thread grooves, the outer walls of the multiple sets of limiting shafts (10) are movably installed with limiting rings (13), and the inner walls of the multiple sets of limiting rings (13) are provided with protrusions that are movably connected to the inner walls of the reciprocating thread grooves.

6. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 5, characterized in that: Each of the multiple sets of limiting rings (13) has a connecting plate (14) installed at its bottom end, and the outer wall of each of the multiple sets of connecting plates (14) is movably connected to the inner wall of each of the multiple sets of support plates (9). Each of the multiple sets of connecting plates (14) has an installation block (15) installed at one end.

7. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 6, characterized in that: The outer walls of the multiple sets of movable rings (17) are symmetrically provided with sliding grooves (19), and the outer walls of the multiple sets of mounting blocks (15) are symmetrically provided with arc-shaped blocks (16), and the outer walls of the multiple sets of arc-shaped blocks (16) are respectively movably connected to the inner walls of the multiple sets of sliding grooves (19).

8. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 7, characterized in that: Each of the multiple sets of movable rings (17) has an opening at one end, and the length of each of the multiple sets of arc blocks (16) is greater than the length of the opening at one end of each of the multiple sets of movable rings (17).

9. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 1, characterized in that: The multiple sets of the active rings (17) are all staggered.

10. The spiral tube waste heat recovery and reuse equipment for a large-scale tea roasting machine according to claim 1, characterized in that: A collection box (20) is movably installed inside the main body (1) of the equipment, and one end of the collection box (20) extends to the outer wall of the main body (1).

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