A waste heat recovery device for aluminum rod heating furnaces used in profile production.

Abstract

This invention discloses a waste heat recovery device for an aluminum rod heating furnace in profile production, comprising a first heat recovery mechanism; the first heat recovery mechanism includes a first heat insulation cover, a first heat-conducting pipe, a transmission pipe, and a first driving mechanism; the first heat-conducting pipe is disposed inside the first heat insulation cover and connected to the transmission pipe, the transmission pipe having a transmission groove in its wall, and the first driving mechanism driving the transmission pipe to rotate; the inner wall of the first heat insulation cover is provided with spirally distributed guide strips, and one end surface of the first heat insulation cover has a feed inlet; the surface of the first heat-conducting pipe is provided with multiple isolation strips, and the surface of the first heat-conducting pipe has multiple first air grooves. This invention effectively recovers the waste heat and residual temperature of the aluminum rod heating furnace, not only making full use of the heat but also effectively improving the working environment.

Description

Technical Field

[0001] This invention relates to the field of energy recovery and utilization technology, specifically to a device for recovering waste heat and temperature from a heating furnace used in aluminum rod production. Background Technology

[0002] Aluminum profile processing plays a crucial role in the manufacturing industry, and the energy consumption and utilization efficiency of its production process are of paramount importance. Currently, aluminum profile processing mainly employs the extrusion process of heating aluminum rods. Specifically, the aluminum rod is first heated to a specific temperature using an induction heating furnace, and then placed in an extruder and pressed into the die orifice to form a profile with the desired cross-sectional shape.

[0003] In existing aluminum profile production processes, induction heating furnaces are widely used due to their advantages such as fast heating speed, energy efficiency, and precise temperature control, as they can directly heat aluminum bars using the electromagnetic induction eddy current effect. Although induction heating furnaces maintain a low external temperature through insulation and water cooling systems, these protective measures essentially only isolate and conduct residual heat and temperature escaping from the furnace. They do not effectively recover and reuse this heat, resulting in insufficient energy concentration and efficiency, reduced energy utilization, and shortcomings in energy saving and environmental protection during the aluminum bar heating process.

[0004] Regarding existing furnace body protection measures for induction heating furnaces, on the one hand, high-performance insulation materials are expensive, which undoubtedly increases the investment costs for enterprises. On the other hand, water cooling measures can only cool the outer shell of the furnace body, reducing the temperature difference between the inside and outside of the induction heating furnace to improve the working environment. However, water cooling only conducts and transfers the residual heat of the furnace body, without effectively collecting and utilizing this heat, resulting in energy loss.

[0005] Within the current technological framework, waste heat recovery often employs a medium to absorb escaping heat and then outputs the absorbed heat in a specific manner. However, this type of waste heat recovery method has low energy utilization efficiency, and the entire energy recovery system requires a certain investment in pipeline laying costs, resulting in unsatisfactory economic benefits. Summary of the Invention

[0006] The purpose of this invention is to provide a waste heat recovery device for aluminum rod heating furnaces used in profile production, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery device for an aluminum rod heating furnace used in profile production, comprising a first heat recovery mechanism;

[0008] The first heat recovery mechanism includes a first heat insulation cover, a first heat conducting pipe, a transmission pipe, and a first driving mechanism;

[0009] The first heat-conducting pipe is disposed inside the first heat insulation cover. The first heat-conducting pipe is connected to the transmission pipe. The transmission pipe has a transmission groove on its wall. The first driving mechanism drives the transmission pipe to rotate.

[0010] The inner wall of the first heat insulation cover is provided with guide strips distributed in a spiral shape, and a feed port is opened on one end surface of the first heat insulation cover. The surface of the first heat conduction pipe is provided with multiple isolation strips, and the surface of the first heat conduction pipe is provided with multiple first air grooves.

[0011] Preferably, the first heat recovery mechanism includes a cover plate disposed inside the feed inlet.

[0012] Preferably, the first drive mechanism includes a first motor and a first transmission gear, wherein the first transmission gear is connected to the output end of the first motor;

[0013] A toothed ring is provided on one end surface of the transmission tube, and the toothed ring meshes with the first transmission gear.

[0014] Preferably, the number of transmission slots is one or more.

[0015] Preferably, it includes a propulsion mechanism, which includes a cylinder and a push plate, the push plate being connected to the output end of the cylinder;

[0016] The pusher plate is located inside the transmission tube.

[0017] Preferably, the first heat recovery mechanism includes a distance sensor, and the distance sensor and the transmission pipe are respectively located at the same end of the first heat insulation cover.

[0018] Preferably, one or more air vents are provided on one side end face of the first heat insulation cover.

[0019] Preferably, it includes a second heat recovery mechanism, and the first heat recovery mechanism is internally connected to the second heat recovery mechanism;

[0020] The second heat recovery mechanism includes a second heat insulation cover, a second drive mechanism, a second heat-conducting pipe, and an impeller. The surface of the second heat-conducting pipe is provided with a plurality of second air grooves. The second heat-conducting pipe is disposed inside the second heat insulation cover. The impeller is sleeved on the pipe wall surface of the second heat-conducting pipe. The second drive mechanism drives the impeller to rotate.

[0021] The surface of the second heat pipe is provided with multiple fins, and a bearing is provided between the pipe wall of the second heat pipe and the impeller.

[0022] Preferably, the second drive mechanism includes a second motor and a second transmission gear, wherein the second transmission gear meshes with the output end of the second motor;

[0023] The impeller has a toothed groove at its edge, and the second transmission gear meshes with the toothed groove.

[0024] Preferably, the second heat recovery mechanism includes a temperature sensor, which is disposed on the inner wall of the second heat insulation cover.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By setting up a first heat recovery mechanism, the present invention achieves the effect of effectively collecting the heat loss from the outside of the heating mechanism and using it for preheating aluminum rods. The first heat recovery mechanism isolates the heat loss from the outside of the heating mechanism from the external space, which can reduce heat loss and improve the production environment. On the other hand, it can transfer the aluminum rod to be heated and use the heat loss to preheat the aluminum rod, which not only improves the utilization efficiency of waste heat, but also improves the heating efficiency of the aluminum rod.

[0027] 2. By setting up a propulsion mechanism, the present invention achieves the effect of directly inputting the preheated aluminum rod into the heating mechanism. The propulsion mechanism can push the preheated aluminum rod in the first heat recovery mechanism into the heating mechanism, achieving continuous preheating and feeding processes, effectively reducing the heat consumption of the preheated aluminum rod during the transfer process, and ensuring the preheating effect of the aluminum rod.

[0028] 3. By setting up a second heat recovery mechanism, the present invention achieves the effect of effectively collecting and reusing the heat at the outlet of the heating mechanism. The second heat recovery mechanism absorbs the heat dissipated at the outlet of the heating mechanism and transfers it to the first heat recovery mechanism, further improving the effect of the first heat recovery mechanism in preheating the aluminum rod, and achieving the effect of fully recovering and reusing the residual heat at the outlet of the heating mechanism. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the external structure in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the main cross-sectional structure in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the exploded structure of the axial component in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the first heat recovery mechanism in an embodiment of the present invention;

[0033] Figure 5This is a schematic diagram of the first heat shield structure in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the external structure of the transmission tube in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram showing the positional distribution of the propulsion mechanism and transmission pipe in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the exploded structure of the axial components of the second heat recovery mechanism in an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the main cross-sectional structure of the second heat recovery mechanism in an embodiment of the present invention.

[0038] In the picture:

[0039] 100. First heat recovery mechanism; 110. First heat insulation cover; 111. Guide bar; 112. Feed inlet; 113. Air vent; 120. First heat conduction pipe; 121. Isolation bar; 122. First air trough; 130. Distance sensor; 140. Cover plate; 150. Transmission pipe; 151. Transmission trough; 152. Gear ring; 160. First drive mechanism; 161. First motor; 162. First transmission gear;

[0040] 200. Second heat recovery mechanism; 210. Second heat insulation cover; 220. Second drive mechanism; 221. Second motor; 222. Second transmission gear; 230. Second heat conduction pipe; 231. Fin; 232. Bearing; 233. Second air duct; 240. Impeller; 241. Gear; 250. Temperature sensor;

[0041] 300. Propulsion mechanism; 310. Cylinder; 320. Push plate;

[0042] 400. Heating mechanism. Detailed Implementation

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] Please see Figures 1 to 9 The present invention provides the following two embodiments:

[0045] Example 1:

[0046] Please see Figures 1 to 3 A waste heat recovery device for an aluminum rod heating furnace used in profile production includes a first heat recovery mechanism 100.

[0047] Please see Figure 2 and Figure 3 The first heat recovery mechanism 100 is located outside the heating mechanism 400 and is used to effectively collect the waste heat and residual temperature that escapes from the outside of the heating mechanism 400 and use the escaped waste heat and residual temperature to preheat the aluminum rod.

[0048] Specifically, the heating mechanism 400 adopts a medium-frequency or high-frequency induction heating furnace. Its main structure consists of a hollow copper tube, a spiral rotating induction coil, an insulation layer, and a power supply system. After the induction coil is energized, the aluminum rod moves in the hollow copper tube, and the induction coil generates eddy currents inside the aluminum rod, thereby generating heat to heat the aluminum rod.

[0049] Please see Figures 2 to 6 The first heat recovery mechanism 100 includes a first heat insulation cover 110, a first heat conduction pipe 120, a transmission pipe 150, and a first drive mechanism 160.

[0050] Specifically, the first heat insulation cover 110 forms the outer shell structure of the first heat recovery mechanism 100, and is made of heat-insulating material. On the one hand, it prevents internal heat from escaping, and on the other hand, it improves the working environment temperature. The first heat conduction pipe 120 absorbs the heat escaping from the outer wall of the heating mechanism 400, and on the other hand, it acts as a driving component to drive the aluminum rod to move continuously within the first heat recovery mechanism 100.

[0051] Please see Figure 4 and Figure 6 The first heat pipe 120 is disposed inside the first heat insulation cover 110. The first heat pipe 120 is connected to the transmission pipe 150. The transmission pipe 150 has a transmission groove 151 on its wall. The first driving mechanism 160 drives the transmission pipe 150 to rotate.

[0052] It is worth noting that the inner diameter of the transmission tube 150 is the same as the diameter of the hollow copper tube inside the heating mechanism 400.

[0053] Please see Figure 7 The first drive mechanism 160 includes a first motor 161 and a first transmission gear 162, with the first transmission gear 162 connected to the output end of the first motor 161.

[0054] A gear ring 152 is provided on one end surface of the transmission pipe 150, and the gear ring 152 meshes with the first transmission gear 162.

[0055] While the first driving mechanism 160 drives the transmission tube 150 to rotate, the transmission tube 150 can simultaneously drive the first heat conduction tube 120 to rotate, so that the aluminum rod can be continuously transferred in the first heat recovery mechanism 100.

[0056] Specifically, the transmission pipe 150 is used to construct a transmission channel between the first heat recovery mechanism 100 and the heating mechanism 400, eliminating the need to transport the preheated aluminum rod through the outdoor environment to the interior of the heating mechanism 400, reducing heat loss and ensuring the effectiveness of the aluminum rod in preheating using residual heat.

[0057] Please see Figure 5 The inner wall of the first heat insulation cover 110 is provided with guide strips 111 arranged in a spiral shape, and a feed port 112 is opened on one end surface of the first heat insulation cover 110. The surface of the first heat conduction pipe 120 is provided with multiple isolation strips 121, and the surface of the first heat conduction pipe 120 is provided with multiple first air grooves 122.

[0058] It is worth noting that the diameter of the circular trajectory formed by the edges of the multiple isolation strips 121 is smaller than the inner wall diameter of the guide strip 111.

[0059] Meanwhile, the spiral spacing of the guide bar 111 is adapted to the length of the aluminum rod, and the distance between the inner wall of the first heat insulation cover 110 and the outer wall of the first heat conduction pipe 120 is adapted to the diameter of the aluminum rod.

[0060] Specifically, when the heating mechanism 400 is working, the residual heat and temperature escaping from the outer wall of the heating mechanism 400 are collected in the first heat conduction pipe 120. The residual heat and temperature are conducted through the first heat conduction pipe 120 on the one hand, and can also flow into the interior of the first heat insulation cover 110 through the first air groove 122 with the airflow on the other hand.

[0061] An aluminum rod enters the interior of the first heat insulation cover 110 through the feed port 112. Due to the isolation strips 121 set on the first heat conduction pipe 120, after the aluminum rod enters the first heat insulation cover 110, it is located in the area between adjacent isolation strips 121 on the surface of the first heat conduction pipe 120. With the rotation of the first heat conduction pipe 120, the isolation strips 121 push the aluminum rod to enter the preheating space along the guide strips 111 on the inner wall of the first heat insulation cover 110 at the initial position.

[0062] Because the guide bar 111 is spiral-shaped, the aluminum rod moves along the surface of the guide bar 111 under the influence of the isolation bar 121, and also moves along the surface of the first heat pipe 120. This spiral movement of the aluminum rod within the first heat recovery mechanism 100 increases its preheating path and residence time. By utilizing the residual heat and temperature stored in the first heat recovery mechanism 100, the aluminum rod is fully preheated, achieving efficient recovery and reuse of residual heat and temperature.

[0063] Please see Figure 2 and Figure 3The first heat recovery mechanism 100 includes a cover plate 140, which is disposed inside the feed inlet 112.

[0064] Specifically, the cover plate 140 and the first heat insulation cover 110 are made of the same material, which is a heat insulation material. The cover plate 140 is used to cover the feed inlet 112 to prevent the heat in the first heat recovery mechanism 100 from being dissipated from the feed inlet 112 and to maintain the closed state inside the first heat recovery mechanism 100.

[0065] It is worth noting that the number of transmission channels 151 is one or more. Specifically, the number of transmission channels 151 is one. The transmission channel 151 is used to transmit the aluminum rod that has moved to the end of the guide bar 111 to the inside of the transmission tube 150.

[0066] Specifically, the waste heat recovery device for the aluminum rod heating furnace also includes a propulsion mechanism 300, which includes a cylinder 310 and a pusher plate 320. The pusher plate 320 is connected to the output end of the cylinder 310. The pusher plate 320 is located inside the transmission pipe 150.

[0067] After the aluminum rod falls into the transmission tube 150 through the transmission groove 151, the pushing mechanism 300 pushes the aluminum rod out into the heating mechanism 400. Specifically, the cylinder 310 pushes out the push plate 320. The pushing stroke of the cylinder 310 corresponds to the length of the aluminum rod. That is, after the aluminum rod falls into the transmission tube 150 in sequence, the pushing stroke of the push plate 320 is the same as the length of the aluminum rod, which can push the aluminum rod completely into the heating mechanism 400. Then, after the push plate 320 retracts, the reserved space in the transmission tube 150 can meet the output of aluminum rods of the same length in the future. Repeat this process to realize the sequential pushing of aluminum rods of the same length into the heating mechanism 400, forming a continuous aluminum rod preheating, output and heating process.

[0068] It is worth noting that the first heat recovery mechanism 100 includes a distance sensor 130, and the distance sensor 130 and the transmission pipe 150 are located at the same end of the first heat insulation cover 110.

[0069] Distance sensor 130 is used to detect the rotational position of transfer groove 151 and the state of the aluminum rod passing through transfer groove 151.

[0070] Specifically:

[0071] When the transmission channel 151 rotates to face the distance sensor 130 and there is no aluminum rod inside the transmission channel 151, the distance detected by the distance sensor 130 is at its maximum value, and the output signal is sent to the propulsion mechanism 300, and the propulsion mechanism 300 does not move.

[0072] When the transmission trough 151 is not rotated to face the distance sensor 130, and there is an aluminum rod between the inside of the transmission tube 150 and the distance sensor 130, the distance sensor 130 detects the minimum distance value.

[0073] When the aluminum rod falls from the transfer groove 151 into the transfer tube 150, the distance value detected by the distance sensor 130 changes significantly within a short period of time. This change in value serves as a prerequisite for the operation of the pushing mechanism 300. This change in value indicates that the aluminum rod has entered the transfer tube 150. The pushing mechanism 300 then uses the cylinder 310 to push out the push plate 320, thereby pushing the aluminum rod into the heating mechanism 400. Subsequently, the push plate 320 immediately resets.

[0074] It is worth noting that the first motor 161 is a servo motor and is equipped with a servo controller. The servo controller can control the operating parameters of the first motor 161, such as its rotation speed, number of revolutions per cycle, and rotation angle per cycle, to control the residence time of the aluminum rod in the first heat recovery mechanism 100 and the frequency of the aluminum rod input into the heating mechanism 400. Operators can flexibly adjust the speed and frequency of the aluminum rod input into the heating mechanism 400 according to actual needs to ensure optimal heating speed, heating temperature, and maintain a suitable preheating time for the aluminum rod.

[0075] Based on the content of Embodiment 1 above, another embodiment is proposed:

[0076] Example 2:

[0077] Please see Figure 3 and Figure 4 The first heat insulation cover 110 has an air window 113 on one side end face. The number of air windows 113 is one or more. Specifically, there are six air windows 113. The air windows 113 are used to connect the internal space of the first heat recovery mechanism 100 and the second heat recovery mechanism 200.

[0078] Please see Figures 1 to 3 It includes a second heat recovery mechanism 200, which is internally connected to the first heat recovery mechanism 100. The second heat recovery mechanism 200 is connected to one end of the heating mechanism 400. Specifically, the second heat recovery mechanism 200 is used to effectively recover the residual heat and temperature dissipated from the output space of the heating mechanism 400, and transfer the heat to the first heat recovery mechanism 100 for preheating the aluminum rod inside the first heat recovery mechanism 100.

[0079] Please see Figure 3 , Figure 8 and Figure 9 The second heat recovery mechanism 200 includes a second heat insulation cover 210, a second drive mechanism 220, a second heat conduction pipe 230, and an impeller 240.

[0080] Specifically, the second heat pipe 230 is connected to the hollow copper pipe of the heating mechanism 400, and they have the same inner diameter.

[0081] Please see Figure 8 and Figure 9 The second heat pipe 230 is disposed inside the second heat insulation cover 210, and a plurality of second air grooves 233 are formed on the surface of the second heat pipe 230.

[0082] Specifically, the second heat pipe 230 directly absorbs the waste heat dissipated at the outlet of the heating mechanism 400 on the one hand, and on the other hand, hot air enters the second heat recovery mechanism 200 through the second air groove 233.

[0083] The surface of the second heat pipe 230 is provided with multiple fins 231. When the heat absorbed by the second heat pipe 230 is diffused through the fins 231, the residual heat at the opening of the heating mechanism 400 is fully absorbed, reducing the heat loss at the opening of the heating mechanism 400.

[0084] Please see Figure 8 and Figure 9 An impeller 240 is fitted onto the wall surface of the second heat-conducting pipe 230. A bearing 232 is provided between the wall of the second heat-conducting pipe 230 and the impeller 240. The bearing 232 is used to improve the smoothness of rotation between the impeller 240 and the second heat-conducting pipe 230 and reduce mechanical wear. The second drive mechanism 220 drives the impeller 240 to rotate, thereby generating a hot airflow that is input into the first heat recovery mechanism 100, and thus transferring the heat in the second heat recovery mechanism 200.

[0085] It is worth noting that the second drive mechanism 220 includes a second motor 221 and a second transmission gear 222. The second transmission gear 222 meshes with the output end of the second motor 221. A toothed groove 241 is provided at the edge of the impeller 240, and the second transmission gear 222 meshes with the toothed groove 241.

[0086] The second motor 221 is a servo motor and is also equipped with a servo controller. The operator can control the speed of the second motor 221 through the servo controller to adjust the speed of the drive impeller 240, thereby adjusting the speed of the hot air flow into the first heat recovery mechanism 100.

[0087] It is worth noting that, please refer to Figure 9 The second heat recovery mechanism 200 includes a temperature sensor 250, which is disposed on the inner wall of the second heat insulation cover 210.

[0088] Temperature sensor 250 is used to detect the temperature inside the second heat recovery mechanism 200 and can feed it back to the second drive mechanism 220.

[0089] Specifically, when the air temperature in the second heat recovery mechanism 200 is low, the second drive mechanism 220 stops operating. If the temperature in the second heat recovery mechanism 200 is below 50°C, air is input into the first heat recovery mechanism 100, which will affect the preheating temperature of the aluminum rod in the first heat recovery mechanism 100.

[0090] When the air temperature in the second heat recovery mechanism 200 is greater than 50°C, the second drive mechanism 220 operates at low speed and delivers a small amount of airflow to the first heat recovery mechanism 100, which serves to circulate and preheat the air in the air passage connecting the heating mechanism 400, the first heat recovery mechanism 100, and the second heat recovery mechanism 200.

[0091] When the air temperature after passing through the heating mechanism 400 and entering the second heat recovery mechanism 200 through the second air tank 233 is greater than 80°C, the second drive mechanism 220 operates at medium speed, inputting the hot air from the second heat recovery mechanism 200 into the first heat recovery mechanism 100, and then into the heating mechanism 400 through the transmission tank 151.

[0092] Due to the rotation of the impeller 240, a low pressure is formed in the second heat recovery mechanism 200, which draws the air from the outlet of the heating mechanism 400 into the interior of the second heat recovery mechanism 200 through the second air groove 233, forming an airflow circulation and constituting a complete waste heat and waste temperature reuse cycle. The hot air enters the first heat recovery mechanism 100 from the second heat recovery mechanism 200 in sequence to preheat the aluminum rods that are continuously transported in the first heat recovery mechanism 100.

[0093] The waste heat generated during the heating process of the aluminum rod by the heating mechanism 400 is recovered and reused accordingly. The recovery and reuse of waste heat is only used for the preheating of the aluminum rod. The utilization of waste heat is more targeted, the enterprise has lower investment in energy conservation and environmental protection, and it can effectively reduce the energy consumption of the heating mechanism 400, thereby improving the heating efficiency of the aluminum rod.

[0094] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A waste heat recovery device for an aluminum rod heating furnace used in profile production, comprising a heating mechanism (400), characterized in that: It includes a first heat recovery mechanism (100), which is disposed outside the heating mechanism (400); The first heat recovery mechanism (100) includes a first heat insulation cover (110), a first heat conduction pipe (120), a transmission pipe (150), and a first drive mechanism (160). The first heat-conducting pipe (120) is disposed inside the first heat insulation cover (110). The first heat-conducting pipe (120) is connected to the transmission pipe (150). The transmission pipe (150) has a transmission groove (151) on its wall. The first driving mechanism (160) drives the transmission pipe (150) to rotate. The inner wall of the first heat insulation cover (110) is provided with guide strips (111) arranged in a spiral shape, and a feed port (112) is opened on one end surface of the first heat insulation cover (110). The surface of the first heat conduction pipe (120) is provided with multiple isolation strips (121), and the surface of the first heat conduction pipe (120) is provided with multiple first air grooves (122). The first heat insulation cover (110) has an air window (113) on one side end face, and the number of air windows (113) is one or more; It includes a second heat recovery mechanism (200), and the first heat recovery mechanism (100) and the second heat recovery mechanism (200) are internally connected; The second heat recovery mechanism (200) includes a second heat insulation cover (210), a second drive mechanism (220), a second heat conduction pipe (230), and an impeller (240). The surface of the second heat conduction pipe (230) is provided with a plurality of second air grooves (233). The second heat conduction pipe (230) is disposed inside the second heat insulation cover (210). The impeller (240) is sleeved on the pipe wall surface of the second heat conduction pipe (230). The second drive mechanism (220) drives the impeller (240) to rotate. The surface of the second heat pipe (230) is provided with a plurality of fins (231), and a bearing (232) is provided between the pipe wall of the second heat pipe (230) and the impeller (240).

2. The waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: The first heat recovery mechanism (100) includes a cover plate (140) disposed inside the feed inlet (112).

3. The waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: The first drive mechanism (160) includes a first motor (161) and a first transmission gear (162), wherein the first transmission gear (162) is connected to the output end of the first motor (161); A toothed ring (152) is provided on one end surface of the transmission pipe (150), and the toothed ring (152) meshes with the first transmission gear (162).

4. The waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: The number of transmission slots (151) is one or more.

5. The waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: It includes a propulsion mechanism (300), which includes a cylinder (310) and a push plate (320), wherein the push plate (320) is connected to the output end of the cylinder (310); The push plate (320) is located inside the transmission tube (150).

6. A waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 5, characterized in that: The first heat recovery mechanism (100) includes a distance sensor (130), which is located at the same end of the first heat insulation cover (110) as the transmission pipe (150).

7. A waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: The second drive mechanism (220) includes a second motor (221) and a second transmission gear (222), the second transmission gear (222) meshing with the output end of the second motor (221); The impeller (240) has a toothed groove (241) at its edge, and the second transmission gear (222) meshes with the toothed groove (241).

8. A waste heat recovery device for an aluminum rod heating furnace in profile production according to claim 1, characterized in that: The second heat recovery mechanism (200) includes a temperature sensor (250) disposed on the inner wall of the second heat insulation cover (210).

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