Heat energy recovery type carbonization furnace for graphite production
By introducing a rotary adjustment mechanism and a waste heat recovery mechanism into the carbonization furnace, the problem of low heat utilization during internal circulation of heat energy is solved, the uniformity of graphite carbonization and efficient recovery of heat energy are achieved, the waste of heat is reduced, and clean water is provided Workers use.
Patent Information
- Application Number
- CN202420503516.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The existing carbonization furnace for thermal energy recovery graphite production has poor thermal energy utilization during the internal circulation of thermal energy, and the internal hot air escapes when the material is taken, resulting in a more general thermal energy recovery.
A carbonization furnace including a furnace body, a water tank, a rotary adjustment mechanism and a waste heat recovery mechanism is designed. The rotary adjustment mechanism controls the communication and closing of the material tank to achieve uniform heat transfer and preheating. The waste heat recovery mechanism is pumped through a fan and The air pipe and heat dissipation pipe extract the hot air and heat clean water in the water tank to reduce the escape of hot air and improve the utilization of heat energy.
It improves the speed and quality of graphite carbonization, reduces heat energy waste, realizes efficient recycling of heat energy, avoids heat waste, and provides clean water for workers to use.
Smart Images
Figure CN222143787U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of graphite carbonization, and specifically refers to a heat energy recovery type carbonization furnace for graphite production. Background Art
[0002] Graphite pre-carbonization refers to the process of heating the originally brittle, small-pore graphite material within a certain temperature range to transform it into an elastic, large-pore carbon material. This process is different from traditional carbonization. The original appearance of graphite has been frozen in the pre-carbonization stage, so it has the advantages of uniform density and low porosity.
[0003] The graphite carbonization furnace itself is a structure with excellent sealing and heat preservation. The existing patent number is CN209291972U, which is a heat recovery type carbonization furnace for graphite production. Although it can recover heat energy for heating pretreatment and reuse the heat energy, it is a heat energy internal circulation structure, and the exhaust gas still contains some heat energy. When taking materials, the internal hot air will still escape. The heat recovery is general and the heat energy utilization rate is poor. Utility Model Content
[0004] The technical problem to be solved by the utility model is that the utilization rate of heat energy is poor during the internal circulation of heat energy, and the escape of hot air inside the material taking leads to the general heat energy recovery.
[0005] To solve the above problems, the technical solution adopted by the utility model is as follows: the utility model proposes a heat recovery type carbonization furnace for graphite production, including a furnace body and a water tank, the lower part of the furnace body is fixedly provided with supporting legs, the upper inner part of the furnace body is set as a preheating chamber, the lower inner part of the furnace body is set as a carbonization chamber, a heating device is provided inside the carbonization chamber, and also includes a waste heat recovery mechanism, a rotary adjustment mechanism and a filter bin, the waste heat recovery mechanism is arranged outside the furnace body, the waste heat recovery mechanism includes an exhaust fan, an exhaust pipe and a heat dissipation pipe, the exhaust fan is fixedly connected to the furnace body and passes through the furnace body, one end of the exhaust fan is connected to the preheating chamber, the other end of the exhaust fan is connected to the exhaust pipe, the lower end of the exhaust pipe is through-connected with the water tank, the heat dissipation pipe is fixed inside the water tank, one end of the heat dissipation pipe is through-connected with the exhaust pipe, and the other end of the heat dissipation pipe is through-connected with the water tank.
[0006] Furthermore, the filter chamber and the outer side of the water tank are fixedly connected as one, the filter chamber includes a hatch, an external exhaust port and a filter screen, the heat dissipation pipe and the filter chamber are through-connected, the hatch and the filter chamber are rotatably connected by a hinge, the external exhaust port and the filter chamber are fixedly connected and pass through the filter chamber, and a filter screen is provided at the connection between the external exhaust port and the filter chamber.
[0007] Furthermore, a funnel-shaped first discharge trough is provided at the lower portion of the preheating chamber, a funnel-shaped second discharge trough is provided at the lower portion of the carbonization chamber, the lower ends of the first discharge trough and the second discharge trough are both fixedly connected with an insulation partition, the lower ends of the first discharge trough and the second discharge trough both penetrate the insulation partition, a discharge port is provided at the lower portion of the furnace body, the discharge port and the lower portion of the furnace body are through-connected, a feed port is fixedly provided at the upper portion of the furnace body, a feed cover is provided at the upper portion of the feed port, and the feed cover and the feed port are rotatably connected via a hinge.
[0008] Furthermore, a water inlet is fixedly provided at the upper portion of the water tank, and the water inlet is connected to the water tank through, and a drain is fixedly provided at the lower portion of the water tank, and the drain is connected to the water tank through.
[0009] Furthermore, the rotation adjustment mechanism is arranged inside the furnace body, and the rotation adjustment mechanism includes a motor and a connecting shaft. The lower end of the connecting shaft is rotatably connected to the furnace body and passes through the furnace body, the middle part of the connecting shaft is rotatably connected to the thermal insulation partition on the lower side and passes through the thermal insulation partition on the lower side, the upper end of the connecting shaft is rotatably connected to the thermal insulation partition on the upper side, the motor is arranged at the lower part of the furnace body, the connecting shaft is connected to the motor, and the lower part of the thermal insulation partition on the lower side is rotatably connected with a lower driving gear and a lower driven gear, the lower driving gear and the lower part of the connecting shaft are fixed as a whole, the lower driving gear and the lower driven gear are meshingly connected, a single connecting hole is provided on the lower driven gear, the connecting hole and the lower driven gear are through-connected, the lower part of the lower driven gear is fixed with a discharge pipe, the discharge pipe and the connecting hole in the lower driven gear are through-connected, and the lower part of the discharge pipe is slidably connected to the lower part of the furnace body.
[0010] Furthermore, the lower part of the upper insulation partition is rotatably connected with an upper driving gear and an upper driven gear, the upper driving gear and the upper end of the connecting shaft are fixed as a whole, the upper driving gear and the upper driven gear are meshingly connected, and the upper driven gear is provided with two connecting holes, the two connecting holes are respectively arranged on both sides of the upper driven gear, and the connecting hole and the upper driven gear are through-connected.
[0011] Furthermore, the first discharge trough, the second discharge trough, the connecting hole, the discharge pipe and the inner aperture of the discharge port are of the same size, the lower driving gear and the upper driving gear are of the same size, the upper driven gear and the lower driven gear are of the same size, the connecting hole on the lower driven gear on the lower side and the connecting hole on one side of the upper driven gear on the upper side are arranged in the same vertical direction, and the size of the upper driving gear is smaller than that of the upper driven gear.
[0012] Furthermore, the heat dissipation pipe is configured as a curved tubular structure, and the outer side of the exhaust pipe wall is wrapped with thermal insulation cotton.
[0013] The beneficial effects achieved by the utility model using the above structure are as follows:
[0014] 1. The heat recovery type carbonization furnace for graphite production proposed in this scheme completes the connection and closing of the preheating chamber and the carbonization chamber by arranging a rotary adjustment mechanism inside the furnace body to control the switch of the first discharge slot and the second discharge slot, so as to facilitate the control of the heat inside the carbonization chamber to be transferred to the inside of the preheating chamber to preheat the graphite. While avoiding heat waste, the heating rate of the graphite is slowed down, the uniformity of the heating and carbonization of the graphite can be ensured, and the speed and quality of the graphite carbonization are improved.
[0015] 2. The heat recovery type carbonization furnace for graphite production proposed in this scheme connects a waste heat recovery mechanism to the outside of the furnace body, extracts the hot air inside the furnace body, and reduces the escape of hot air from the discharge port, thereby accelerating the cooling of the carbonized graphite inside the carbonization chamber and reasonably recovering the waste heat inside the furnace body. After heating the clean water inside the water tank, it can be used by workers, thereby reasonably recovering and utilizing heat energy and reducing the waste of heat energy resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the overall cross section of the utility model;
[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram in the middle;
[0019] Figure 4 It is a first partial cross-sectional schematic diagram of the utility model;
[0020] Figure 5 It is a second partial cross-sectional schematic diagram of the utility model.
[0021] Among them, 1. furnace body, 101. feed port, 102. feed cover, 103. support leg, 104. preheating chamber, 105. carbonization chamber, 106. insulation partition, 107. discharge port, 108. first discharge chute, 109. second discharge chute, 2. waste heat recovery mechanism, 201. exhaust fan, 202. exhaust pipe, 203. heat dissipation pipe, 3. rotation adjustment mechanism, 301. motor, 302. lower driving gear, 303. connecting shaft, 304. upper driving gear, 305. upper driven gear, 306. connecting hole, 307. lower driven gear, 308. discharge pipe, 4. water tank, 401. water inlet, 402. drain outlet, 5. filter bin, 501. hatch, 502. external exhaust port, 503. filter screen, 6. heating device.
[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0024] like Figure 1 , Figure 2 and Figure 4 As shown, the utility model proposes a heat recovery type carbonization furnace for graphite production, including a furnace body 1 and a water tank 4, the lower part of the furnace body 1 is fixed with a support leg 103, the upper inner part of the furnace body 1 is set as a preheating chamber 104, the lower inner part of the furnace body 1 is set as a carbonization chamber 105, and the carbonization chamber 105 is provided with a heating device 6. It is characterized in that it also includes a waste heat recovery mechanism 2, a rotation adjustment mechanism 3 and a filter bin 5, the waste heat recovery mechanism 2 is arranged outside the furnace body 1, and the waste heat recovery mechanism The structure 2 includes an exhaust fan 201, an exhaust pipe 202 and a heat dissipation pipe 203. The exhaust fan 201 is fixedly connected to the furnace body 1 and passes through the furnace body 1. One end of the exhaust fan 201 is connected to the preheating chamber 104, and the other end of the exhaust fan 201 is connected to the exhaust pipe 202. The lower end of the exhaust pipe 202 is connected to the water tank 4. The heat dissipation pipe 203 is fixed inside the water tank 4. One end of the heat dissipation pipe 203 is connected to the exhaust pipe 202, and the other end of the heat dissipation pipe 203 is connected to the water tank 4.
[0025] like Figure 1 and Figure 4 As shown, the filter chamber 5 and the outer side of the water tank 4 are fixedly connected as a whole, the filter chamber 5 includes a hatch 501, an external exhaust port 502 and a filter screen 503, the heat dissipation pipe 203 and the filter chamber 5 are through-connected, the hatch 501 and the filter chamber 5 are rotatably connected by a hinge, the external exhaust port 502 and the filter chamber 5 are fixedly connected and penetrate the filter chamber 5, and a filter screen 503 is provided at the connection between the external exhaust port 502 and the filter chamber 5, which is used to filter the air drawn out of the furnace body 1 by the waste heat recovery mechanism 2.
[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a first funnel-shaped discharge trough 108 is provided at the lower portion of the preheating chamber 104, a second funnel-shaped discharge trough 109 is provided at the lower portion of the carbonization chamber 105, the lower ends of the first discharge trough 108 and the second discharge trough 109 are both fixedly connected with an insulation partition 106, the lower ends of the first discharge trough 108 and the second discharge trough 109 both penetrate the insulation partition 106, a discharge port 107 is provided at the lower portion of the furnace body 1, the discharge port 107 is through-connected with the lower portion of the furnace body 1, a feed port 101 is fixedly provided at the upper portion of the furnace body 1, a feed cover 102 is provided at the upper portion of the feed port 101, the feed cover 102 and the feed port 101 are rotatably connected by a hinge, a water inlet 401 is fixedly provided at the upper portion of the water tank 4, the water inlet 401 is through-connected with the water tank 4, a drain port 402 is fixedly provided at the lower portion of the water tank 4, the drain port 402 is through-connected with the water tank 4.
[0027] like Figure 2 , Figure 3 and Figure 5As shown, the rotation adjustment mechanism 3 is arranged inside the furnace body 1, and the rotation adjustment mechanism 3 includes a motor 301 and a connecting shaft 303. The lower end of the connecting shaft 303 is rotatably connected to the furnace body 1 and passes through the furnace body 1. The middle part of the connecting shaft 303 is rotatably connected to the lower insulation partition 106 and passes through the lower insulation partition 106. The upper end of the connecting shaft 303 is rotatably connected to the upper insulation partition 106. The motor 301 is arranged at the lower part of the furnace body 1. The connecting shaft 303 is connected to the motor 301. The lower part of the insulation partition 106 at the lower side is rotatably connected with a lower active gear. The lower driving gear 302 and the lower driven gear 307 are fixedly connected to each other at the bottom of the connecting shaft 303. The lower driving gear 302 and the lower driven gear 307 are meshed and connected. A single connecting hole 306 is provided on the lower driven gear 307. The connecting hole 306 and the lower driven gear 307 are connected through. A discharge pipe 308 is fixedly connected to the lower part of the lower driven gear 307. The discharge pipe 308 and the connecting hole 306 in the lower driven gear 307 are connected through. The lower part of the discharge pipe 308 is slidably connected to the lower part of the furnace body 1. The upper side of the heat preservation insulation The lower part of the break 106 is rotatably connected with an upper driving gear 304 and an upper driven gear 305, the upper driving gear 304 and the upper end of the connecting shaft 303 are fixedly connected as a whole, the upper driving gear 304 and the upper driven gear 305 are meshingly connected, and the upper driven gear 305 is provided with two connecting holes 306, the two connecting holes 306 are respectively arranged on both sides of the upper driven gear 305, the connecting holes 306 and the upper driven gear 305 are through-connected, the first discharge trough 108, the second discharge trough 109, the connecting hole 306, the discharge pipe 308 and the discharge port 1 07, the inner aperture sizes are the same, the lower driving gear 302 and the upper driving gear 304 are the same size, the upper driven gear 305 and the lower driven gear 307 are the same size, the connecting hole 306 on the lower driven gear 307 on the lower side and the connecting hole 306 on the side of the upper driven gear 305 on the upper side are arranged in the same vertical direction, the upper driving gear 304 is smaller than the upper driven gear 305, the small gear drives the large gear to avoid the large gear from rotating too fast, the heat dissipation pipe 203 is set to a curved tubular structure, and the outer side of the exhaust pipe 202 is wrapped with thermal insulation cotton.
[0028] When in use, the feed cover 102 on the feed port 101 is turned to open, and graphite is put into the furnace body 1 through the feed port 101. The heating device 6 is started to heat the inside of the carbonization chamber 105. The motor 301 is started to rotate the connecting shaft 303, and the lower driving gear 302 and the upper driving gear 304 are rotated at the same time. The lower driven gear 307 is driven to rotate under the rotation control of the lower driven gear 307, and the connecting hole 306 on the lower driven gear 307 is driven to rotate from the lower of the second discharge trough 109 to the upper of the second discharge trough 109. The discharge pipe 308 under the lower driven gear 307 rotates away from the discharge port 107, and at the same time, the upper driving gear 304 drives the upper driven gear 305 to rotate, and the upper driven gear 305 and the lower driven gear 307 rotate synchronously, and the connecting hole 306 on the upper driven gear 305, which is arranged in the same vertical direction as the lower driven gear 307, is unscrewed from the lower side of the first discharge slot 108 until the upper driven gear 305 on the other side of the upper driven gear 305 is aligned with the first discharge slot 108, and the motor 301 is temporarily turned off, and the graphite is discharged from the preheating chamber 1. 04 along the first discharge chute 108 through the connection hole 306 on the upper driven gear 305 into the carbonization chamber 105. After the graphite completely enters the carbonization chamber 105, the motor 301 is started to rotate the connecting shaft 303 and the lower driving gear 302 and the upper driving gear 304, and at the same time drives the upper driven gear 305 and the lower driven gear 307 to rotate 90 degrees, until the upper driven gear 305 closes the first discharge chute 108 and the lower driven gear 307 closes the second discharge chute 109, thereby reducing the heating space and increasing the heating carbonization efficiency. Continue heating to complete the high-temperature carbonization of graphite. After the carbonization is completed, the control motor 301 is reversed to drive the connecting shaft 303 and the lower driving gear 302 and the upper driving gear 304 to flip, and at the same time drive the upper driven gear 305 and the lower driven gear 307 to reverse 90 degrees. The hot air has a low density and enters the preheating chamber 104 along the first discharge trough 108 to increase the temperature inside the preheating chamber 104. It can preheat the graphite that is subsequently put into the preheating chamber 104, slow down the heating speed of the graphite, and ensure the uniformity of the heating and carbonization of the graphite.
[0029] Clean water is injected into the water tank 4 through the water inlet 401, and the exhaust fan 201 is started to extract the hot air inside the furnace body 1. The hot air carries the heat and flows through the water tank 4 along the exhaust pipe 202 and the heat dissipation pipe 203. The heat of the hot air is transferred to the clean water inside the water tank 4 along the heat dissipation pipe 203, and the clean water inside the water tank 4 is heated by the waste heat. At the same time, the cooled air enters the filter chamber 5 and is filtered by the filter net 503 inside the filter chamber 5, so as to prevent graphite dust from being discharged into the air along the external exhaust port 502 and causing air pollution. When the exhaust fan 201 extracts the air inside the furnace body 1, the air pressure inside the furnace body 1 decreases, the motor 301 is started to rotate the connecting shaft 303, and the lower driven gear 307 and the upper driven gear 305 are rotated under the control of the lower driving gear 302 and the upper driving gear 304 on the connecting shaft 303, and the lower driven gear 307 and the upper driven gear 305 are rotated 180 degrees, and the connecting hole 306 on the upper driven gear 305 is aligned with the first discharge slot 108, and is in the same vertical direction as the connecting hole 306 on the upper driven gear 305. When the connecting hole 306 on the lower driven gear 307 is aligned with the second discharge groove 109, that is, when the lower part of the discharge pipe 308 is aligned with the discharge port 107, the motor 301 is turned off, and the carbonized graphite is discharged from the discharge port 107 along the second discharge groove 109 and the discharge pipe 308. At the same time, due to the low air pressure inside the furnace body 1, the internal hot air will not escape from the discharge port 107, reducing the heat loss inside the furnace body 1. At the same time, the low temperature air outside enters the furnace body 1 from the discharge port 107 along the discharge pipe 308, accelerating the carbonization of the carbonization chamber 1. 05 The carbonized graphite inside is cooled down to facilitate the subsequent collection of the carbonized graphite. After the collection is completed, the motor 301 is started to control the lower driven gear 307 and the upper driven gear 305 to rotate 90°, until the upper driven gear 305 closes the first discharge chute 108, and the lower driven gear 307 closes the second discharge chute 109, the exhaust fan 201 is turned off, and the above operation is repeated. The clean water heated inside the water tank 4 is discharged from the drain port 402, which can be used for factory workers to take a bath, so as to reasonably recycle and utilize heat energy and reduce the waste of heat energy resources.
[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A heat recovery type carbonization furnace for graphite production, comprising a furnace body and a water tank, wherein the lower part of the furnace body is fixed with support legs, the upper part of the inner side of the furnace body is set as a preheating chamber, the lower part of the inner side of the furnace body is set as a carbonization chamber, and a heating device is set inside the carbonization chamber, characterized in that: The waste heat recovery mechanism also includes a waste heat recovery mechanism, a rotary adjustment mechanism and a filter bin. The waste heat recovery mechanism is arranged outside the furnace body. The waste heat recovery mechanism includes an exhaust fan, an exhaust pipe and a heat dissipation pipe. The exhaust fan is fixedly connected to the furnace body and passes through the furnace body. One end of the exhaust fan is connected to the preheating chamber, and the other end of the exhaust fan is connected to the exhaust pipe. The lower end of the exhaust pipe is through-connected to a water tank. The heat dissipation pipe is fixed inside the water tank, one end of the heat dissipation pipe is through-connected to the exhaust pipe, and the other end of the heat dissipation pipe is through-connected to the water tank.
2. A heat recovery type carbonization furnace for graphite production according to claim 1, characterized in that: The filter bin is fixedly connected to the outside of the water tank as a whole, the filter bin includes a door, an external exhaust port and a filter screen, the heat dissipation pipe is through-connected to the filter bin, the door and the filter bin are rotatably connected by a hinge, the external exhaust port and the filter bin are fixedly connected and penetrate the filter bin, and a filter screen is provided at the connection between the external exhaust port and the filter bin.
3. A heat recovery type carbonization furnace for graphite production according to claim 2, characterized in that: A first funnel-shaped discharge trough is provided at the lower portion of the preheating chamber, and a second funnel-shaped discharge trough is provided at the lower portion of the carbonization chamber. The lower ends of the first discharge trough and the second discharge trough are both fixedly connected with an insulation partition, and the lower ends of the first discharge trough and the second discharge trough both penetrate the insulation partition. A discharge port is provided at the lower portion of the furnace body, and the discharge port is through-connected with the lower portion of the furnace body. A feed port is fixedly provided at the upper portion of the furnace body, and a feed cover is provided at the upper portion of the feed port, and the feed cover and the feed port are rotatably connected by a hinge.
4. A heat recovery type carbonization furnace for graphite production according to claim 3, characterized in that: A water inlet is fixedly arranged at the upper part of the water tank, and the water inlet is connected to the water tank throughly; a drain outlet is fixedly arranged at the lower part of the water tank, and the drain outlet is connected to the water tank throughly.
5. A heat recovery type carbonization furnace for graphite production according to claim 4, characterized in that: The rotary adjustment mechanism is arranged inside the furnace body, and the rotary adjustment mechanism comprises a motor and a connecting shaft. The lower end of the connecting shaft is rotatably connected to the furnace body and passes through the furnace body, the middle part of the connecting shaft is rotatably connected to the thermal insulation partition on the lower side and passes through the thermal insulation partition on the lower side, the upper end of the connecting shaft is rotatably connected to the thermal insulation partition on the upper side, the motor is arranged at the lower part of the furnace body, the connecting shaft is connected to the motor, and the lower part of the thermal insulation partition on the lower side is rotatably connected with a lower driving gear and a lower driven gear, the lower driving gear and the lower part of the connecting shaft are fixedly connected as a whole, the lower driving gear and the lower driven gear are meshedly connected, a single connecting hole is provided on the lower driven gear, the connecting hole and the lower driven gear are through-connected, a discharge pipe is fixedly connected to the lower part of the lower driven gear, the discharge pipe and the connecting hole in the lower driven gear are through-connected, and the lower part of the discharge pipe is slidably connected to the lower part of the furnace body.
6. A heat recovery type carbonization furnace for graphite production according to claim 5, characterized in that: The lower part of the upper insulation partition is rotatably connected with an upper driving gear and an upper driven gear. The upper driving gear and the upper end of the connecting shaft are fixedly connected as a whole. The upper driving gear and the upper driven gear are meshingly connected. Two connecting holes are provided on the upper driven gear. The two connecting holes are respectively arranged on both sides of the upper driven gear. The connecting hole and the upper driven gear are through-connected.
7. A heat recovery type carbonization furnace for graphite production according to claim 6, characterized in that: The first discharge trough, the second discharge trough, the connecting hole, the discharge pipe and the inner aperture of the discharge port are of the same size, the lower driving gear and the upper driving gear are of the same size, the upper driven gear and the lower driven gear are of the same size, the connecting hole on the lower driven gear on the lower side and the connecting hole on one side of the upper driven gear on the upper side are arranged in the same vertical direction, and the size of the upper driving gear is smaller than that of the upper driven gear.
8. A heat recovery type carbonization furnace for graphite production according to claim 7, characterized in that: The heat dissipation pipe is configured as a bent tubular structure, and the outer side of the exhaust pipe wall is wrapped with thermal insulation cotton.