Electromagnetic heating depainting device for recycling ring-pull cans

Abstract

The invention discloses a paint removing device for recycling electromagnetic heating ring-pull cans, and relates to the technical field of ring-pull can recycling, in particular to the paint removing device for recycling the electromagnetic heating ring-pull cans, which comprises a paint removing roller, and the left end of the peripheral surface of the paint removing roller is rotatably connected with an air inlet ring groove drum capable of communicating with the paint removing roller; the right end of the peripheral face of the paint removing roller is rotationally connected with an air suction ring groove roller capable of communicating with the paint removing roller, a communicating part used for communicating the air suction ring groove roller with the air suction ring groove roller is arranged between the air suction ring groove roller and the air suction ring groove roller, and a plurality of air nozzles are evenly formed in the left end of the peripheral face of the paint removing roller. Through the arrangement of a left-end air inlet ring groove drum, a right-end air suction ring groove drum and a communicating part between the left-end air inlet ring groove drum and the right-end air suction ring groove drum, closed-loop airflow circulating channels can be formed at the two ends of the paint removing drum, circulating conveying and waste heat gradient utilization of high-temperature tail gas generated during paint removing operation are achieved, and the overall energy utilization efficiency of the device is greatly improved; and the heating operation energy consumption of the whole machine is reduced.

Description

Technical Field

[0001] This invention relates to the field of aluminum can recycling technology, and more specifically, to a paint stripping device for electromagnetically heated aluminum can recycling. Background Technology

[0002] With the rapid development of the food and beverage industry, the market consumption of aluminum cans has continued to rise, and the number of waste aluminum cans generated has also increased year by year. Waste aluminum cans have extremely high recycling value. Compared with primary aluminum smelting, the recycling of waste aluminum cans can significantly reduce energy consumption and pollutant emissions, and is an important part of the circular economy of the aluminum industry. During the recycling process of waste aluminum cans, the organic printed paint film attached to the outer surface and the protective coating on the inner surface must be removed first. Otherwise, during the subsequent remelting process, the thermal decomposition of the paint film will generate harmful waste gas that pollutes the environment, and at the same time, it will cause the impurity content of the recycled aluminum ingot to exceed the standard, which will seriously affect the quality of recycled aluminum products. Currently, among the processes for removing paint film from waste aluminum cans, thermal desorption has become the mainstream application technology in the industry due to its advantages such as high paint removal efficiency, no secondary water pollution, and good environmental protection. Among them, the drum-type electromagnetic heating paint removal equipment is the core equipment of the thermal desorption method. Electromagnetic heating directly heats the wall of the paint removal drum through electromagnetic induction effect, which has the advantages of high thermal efficiency, good temperature control accuracy, and stable operation, and has been widely used in the field of aluminum can recycling and paint removal. However, in actual industrial applications, existing electromagnetic heating paint stripping devices for aluminum can recycling still have significant technical defects: First, cold aluminum cans are directly fed into the high-temperature paint stripping drum. The cold material feeding causes significant temperature fluctuations in the drum's interior, requiring the cans to remain inside for a longer period to reach the critical temperature range for thermal desorption of the paint film. This not only drastically reduces the continuous processing efficiency of the equipment but also increases the energy consumption of the electromagnetic heating system. Second, a large amount of high-temperature desorption exhaust gas is generated during the paint stripping process. Most existing equipment directly transports this high-temperature exhaust gas to the exhaust gas treatment device. The large amount of sensible heat contained in the exhaust gas is not recovered and is directly dissipated during the exhaust gas treatment process, resulting in serious energy waste and extremely low overall energy efficiency, significantly increasing the operating cost of aluminum can paint stripping. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an electromagnetic heating paint stripping device for recycling aluminum cans, which solves the problems mentioned in the background section.

[0004] The technical solution of this invention is as follows: To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic heating paint stripping device for recycling aluminum cans, comprising a paint stripping drum, an air inlet ring groove rotatably connected to the left end of the outer circumference of the paint stripping drum, and an air intake ring groove rotatably connected to the right end of the outer circumference of the paint stripping drum, and a connecting component for connecting the two is provided between the air inlet ring groove and the air intake ring groove. Multiple air jets are evenly distributed on the left end of the outer circumference of the paint stripping drum. Multiple retractable pushing components are evenly distributed circumferentially at the position where the left end of the outer circumference of the paint stripping drum is wrapped by the air inlet ring groove. Each of the multiple air jets contains a driven barrel that can cause the aluminum cans entering the paint stripping drum to rotate. Multiple inclined guide plates are evenly distributed on the inner circumference of the paint stripping drum.

[0005] Preferably, a plurality of support components are provided along the axial direction directly below the intake ring groove, and an exhaust pipe is provided at the right end of the outer circumference of the intake ring groove.

[0006] Preferably, the connecting component includes a connecting pipe fixedly connected to the outer circumferential surface of the intake ring groove and the outer circumferential surface of the intake ring groove. A fan mounting box is provided at the right end of the connecting pipe, and a high-temperature resistant fan is installed in the fan mounting box. Multiple support rods are fixedly connected to both the front and rear sides of the connecting pipe, and the end of the support rod away from the connecting pipe is fixedly connected to the support component.

[0007] Preferably, the left end of the outer circumferential surface of the air intake ring groove is provided with a first communication port that enables the connecting pipe to communicate with the air intake ring groove, the outer circumferential surface of the air intake ring groove is provided with a second communication port that enables the connecting pipe to communicate with the air intake ring groove, and the right end of the outer circumferential surface of the paint stripping roller is provided with a plurality of third communication ports at a position corresponding to the air intake ring groove.

[0008] Preferably, the end of the pushing component away from the paint stripping roller abuts against the inner circumferential surface of the air intake ring groove, and a plurality of blocking blocks capable of blocking the pushing component are provided at the bottom of the inner circumferential surface of the air intake ring groove.

[0009] Preferably, the pushing component includes two inner sealing barrels, a connecting sealing plate slidably connected to the inner wall of the inner sealing barrel, and an outer sealing plate whose one end can abut against the inner circumferential surface of the air intake ring groove. The end of the connecting sealing plate near the paint stripping roller is fixedly connected to a plurality of first springs, one end of which is set on the inner side of the inner sealing barrel. The end of the connecting sealing plate away from the paint stripping roller is fixedly connected to the corresponding outer sealing plate. A telescopic component is provided between the two inner sealing barrels.

[0010] Preferably, one of the two inner sealing barrels is fixedly connected to the paint stripping roller at one end, and the other inner sealing barrel is always in contact with the paint stripping roller at one end. The left and right ends of the inner sealing barrel, the connecting sealing plate and the outer sealing plate are all in contact with the inner side of the air intake ring groove.

[0011] Preferably, the telescopic component includes a guide limiting cylinder with one end fixedly connected to the side of one of the inner sealing cylinders and a guide limiting rod with one end fixedly connected to the side of the other inner sealing cylinder. The other end of the guide limiting rod is slidably connected to the inner wall of the guide limiting cylinder, and a second spring with one end set on the guide limiting rod is fixedly connected to the inner side of the guide limiting cylinder.

[0012] Preferably, the inner circumferential surface of the jet nozzle is provided with a drive fan blade that can provide power to the driven barrel at one end near the air intake ring groove. The driven barrel has multiple inclined openings on the side away from the paint stripping roller. Multiple actuating columns are fixedly connected to the end of the driven barrel away from the paint stripping roller, and actuating blocks are fixedly connected to the end of the actuating columns away from the driven barrel.

[0013] Preferably, a limiting ring plate is fixedly connected to one end of the outer circumferential surface of the driven barrel near the inner circumferential surface of the intake ring groove. The limiting ring plate is rotatably connected inside the paint stripping roller. A first auxiliary limiting plate is fixedly connected to one end of the inner circumferential surface of the jet nozzle near the intake ring groove. A first rotating shaft is fixedly connected to the middle of the first auxiliary limiting plate. The drive fan blade is fixedly connected to the middle of the first rotating shaft. A second auxiliary limiting plate is fixedly connected to one end of the first rotating shaft away from the first auxiliary limiting plate. Both ends of the second auxiliary limiting plate are fixedly connected to the inner circumferential surface of the driven barrel.

[0014] Beneficial effects This invention provides a paint stripping device for recycling aluminum cans using electromagnetic heating, which has the following beneficial effects: This electromagnetic heating paint stripping device for recycling aluminum cans, through the arrangement of the air inlet ring groove at the left end and the air suction ring groove at the right end of the paint stripping drum, and the connecting component between them, can form a closed-loop airflow circulation channel at both ends of the paint stripping drum. This enables the circulation and transportation of high-temperature exhaust gas generated during the paint stripping operation and the cascade utilization of waste heat, significantly improving the overall energy efficiency of the device and reducing the energy consumption of the entire machine during heating operation. The multiple air jets evenly distributed on the left end of the outer circumference of the paint stripping drum can evenly deliver the recycled high-temperature gas into the left end cavity of the paint stripping drum, preheating the cold aluminum cans just entering the drum. This effectively eliminates temperature fluctuations in the inner cavity of the paint stripping drum caused by cold material feeding, shortens the residence time of the aluminum cans to reach the critical temperature for thermal desorption of the paint film, and improves the continuous paint stripping efficiency of the device. By using multiple retractable pushing components evenly distributed circumferentially at the left end of the outer circumference of the paint stripping roller, which is surrounded by the air inlet ring groove, the internal cavity of the air inlet ring groove can be evenly divided into multiple independent pushing spaces. At the same time, the retraction and extension of the components can drive the circulating airflow in the air inlet ring groove to form a high-speed flow, significantly enhancing the convective heat transfer efficiency between the high-temperature gas and the can, and further improving the preheating rate and effect of the can. The driven barrel inside the jet nozzle can cause the can entering the paint stripping roller to rotate during the airflow process, effectively expanding the heating coverage of the high-temperature airflow on the surface of the can, eliminating the heating blind spots caused by fixed-point heating, ensuring the uniformity of preheating of the entire surface of the can, and providing a stable and reliable temperature basis for the subsequent efficient thermal desorption of the paint film. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the paint stripping roller of the present invention from the left side. Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a partial cross-sectional view of the paint stripping roller of the present invention. Figure 6 This is a schematic diagram of the mating structure of the inner sealing barrel and the outer sealing plate of the present invention.

[0016] In the diagram: 1. Paint stripping roller; 2. Suction ring groove cylinder; 3. Connecting pipe; 4. Fan mounting box; 5. Inlet ring groove cylinder; 6. Outlet pipe; 7. Inclined guide plate; 8. Outer sealing plate; 9. Inner sealing barrel; 10. Connecting sealing plate; 11. First spring; 12. Blocking block; 13. Guide limiting cylinder; 14. Guide limiting rod; 15. Second spring; 16. Driven barrel; 17. Actuating column; 18. Actuating block; 19. Inclined opening; 20. Limiting ring plate; 21. First auxiliary limiting plate; 22. Drive fan blade; 23. Second auxiliary limiting plate; 24. Support rod; 25. Air jet nozzle. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 However, in actual industrial applications, existing electromagnetic heating paint stripping devices for aluminum can recycling still have significant technical defects: First, cold aluminum cans are directly fed into the high-temperature paint stripping drum. The cold material feeding causes significant temperature fluctuations in the drum's interior, requiring the cans to remain inside for a longer period to reach the critical temperature range for thermal desorption of the paint film. This not only drastically reduces the continuous processing efficiency of the equipment but also increases the energy consumption of the electromagnetic heating system. Second, a large amount of high-temperature desorption exhaust gas is generated during the paint stripping process. Most existing equipment directly transports this high-temperature exhaust gas to the exhaust gas treatment device. The large amount of sensible heat contained in the exhaust gas is not recovered and is directly dissipated during the exhaust gas treatment process, resulting in serious energy waste and extremely low overall energy efficiency, significantly increasing the operating cost of aluminum can paint stripping. This embodiment is invented to solve the above problems.

[0019] Please see Figures 1 to 6This invention provides a technical solution: an electromagnetic heating paint stripping device for recycling aluminum cans, comprising a paint stripping drum 1, wherein an electromagnetic heating coil is arranged on the outer circumferential surface of the paint stripping drum 1 (excluding the left end of the outer circumferential surface of the paint stripping drum 1). The electromagnetic heating coil is fixed to the area of ​​the outer circumferential surface of the paint stripping drum 1 except for the left end by winding. When the electromagnetic heating coil is energized, it heats the drum wall of the paint stripping drum 1 through electromagnetic induction, and then heats the aluminum cans entering the inner cavity of the paint stripping drum 1 through heat conduction from the drum wall. The working principle and control method of the electromagnetic heating coil are conventional in the art. The technology is well-established, so it will not be described in detail here. A feeding component is coaxially mounted on the left end of the paint stripping roller 1. The feeding component and the left end opening of the paint stripping roller 1 are in a rotating seal fit, used to continuously convey the cans to be processed into the inner cavity of the paint stripping roller 1. The specific structure, assembly method, and working principle of the feeding component are all mature existing technologies in this field and will not be described in detail here. Simultaneously, the cans that have completed the paint stripping process will be continuously discharged from the right end opening of the paint stripping roller 1 to enter subsequent processing steps. Furthermore, solid waste such as paint film debris and impurities removed from the surface of the cans will also be processed. Waste will also be discharged synchronously from the right end of the paint stripping roller 1 along with the aluminum can. An air inlet ring groove 5, which communicates with the paint stripping roller 1, is rotatably connected to the left end of the outer circumference of the paint stripping roller 1. An air intake ring groove 2, which communicates with the paint stripping roller 1, is rotatably connected to the right end of the outer circumference of the paint stripping roller 1. A connecting component is provided between the air inlet ring groove 5 and the air intake ring groove 2 to connect the two. Multiple air jets 25 are evenly distributed on the left end of the outer circumference of the paint stripping roller 1. Multiple retractable pushing components are evenly distributed circumferentially at the position where the left end of the outer circumference of the paint stripping roller 1 is surrounded by the air inlet ring groove 5. By arranging multiple pushing components, the internal cavity of the air intake ring groove cylinder 5 can be evenly divided into multiple pushing spaces of equal volume. Each of the multiple air jets 25 is equipped with a driven barrel 16 that can cause the aluminum can entering the paint stripping roller 1 to rotate. Multiple inclined guide plates 7 are evenly arranged on the inner circumferential surface of the paint stripping roller 1. As the aluminum can rotates synchronously with the paint stripping roller 1 around its own axis, it can be continuously and smoothly moved to the right end along the axial direction of the paint stripping roller 1 by the inclined guiding and pushing action of the inclined guide plates 7, so as to realize the continuous and stable conveying of the aluminum can to be processed in the paint stripping roller 1.

[0020] Please see Figure 1 Multiple support components are arranged along the axial direction directly below the intake ring groove cylinder 2, wherein the arrangement structure of the support components is as follows: Figure 1As shown, three support components are arranged directly below the paint stripping roller 1. These support components support the paint stripping roller 1 and ensure its structural stability during rotation. Along the axial direction of the paint stripping roller 1, a drive component is arranged on the right side of the first support component. The drive component includes a drive motor, and a drive gear is fixedly mounted on the drive shaft of the drive motor. A drive gear ring is fixedly arranged on the outer peripheral wall of the paint stripping roller 1, and the drive gear ring meshes with the drive gear. When the drive motor starts running, the paint stripping roller 1 can be driven to rotate through the meshing transmission between the drive gear and the drive gear ring. The axis of the device rotates smoothly on the support component. The specific structure, control method and working principle of the support component and the drive component are conventional existing technologies in this field, and will not be described in detail here. An exhaust pipe 6 is provided at the right end of the outer circumference of the intake ring groove cylinder 5. The end of the exhaust pipe 6 close to the intake ring groove cylinder 5 is sealed and connected to the internal annular groove cavity of the intake ring groove cylinder 5. The end of the exhaust pipe 6 away from the intake ring groove cylinder 5 is fixedly connected to the intake interface of the gas processing device by fasteners and is connected to the internal processing cavity of the gas processing device.

[0021] Please see Figure 1 The connecting component includes a connecting pipe 3 fixedly connected to the outer circumferential surface of the intake ring groove 2 and the outer circumferential surface of the intake ring groove 5. A fan mounting box 4 is provided at the right end of the connecting pipe 3. A high-temperature resistant fan is installed inside the fan mounting box 4. The fan mounting box 4 is connected in series on the conveying pipeline of the connecting pipe 3, dividing the connecting pipe 3 axially into a left pipe section and a right pipe section. The two connecting pipe sections 3 located on the left and right sides of the fan mounting box 4 are both fastened to the corresponding side walls of the fan mounting box 4 by bolts, and the cavities of the two separated connecting pipe sections 3 are connected to the inner cavity of the fan mounting box 4. The internal cavities are interconnected to form a through conveying channel. Multiple support rods 24 are fixedly connected to both the front and rear sides of the connecting pipe 3. The end of the support rod 24 away from the connecting pipe 3 is fixedly connected to the support component. The multiple support rods 24 are evenly distributed to reliably limit and fix the connecting pipe 3, so that the air inlet ring groove 5 and the air intake ring groove 2, which are rigidly connected to the connecting pipe 3, maintain a stable position and posture synchronously. When the paint stripping roller 1 rotates around its own axis, the air intake ring groove 2 and the air inlet ring groove 5 remain relatively stationary and do not rotate synchronously with the paint stripping roller 1.

[0022] The left end of the outer circumference of the air intake ring groove cylinder 5 is provided with a first communication port that enables the connecting pipe 3 to connect with the air intake ring groove cylinder 5. The outer circumference of the air intake ring groove cylinder 2 is provided with a second communication port that enables the connecting pipe 3 to connect with the air intake ring groove cylinder 2. The right end of the outer circumference of the paint stripping roller 1 is provided with multiple third communication ports at the position corresponding to the air intake ring groove cylinder 2. Therefore, when the high-temperature fan starts working, it draws the high-temperature gas generated after the paint stripping operation from the inner cavity of the right end of the paint stripping drum 1. The high-temperature gas enters the annular groove cavity of the suction ring groove cylinder 2 through the third connecting port, then flows into the connecting pipe 3 through the second connecting port, and then enters the inner cavity of the intake ring groove cylinder 5 through the first connecting port. Finally, it is sent into the inner cavity of the left end of the paint stripping drum 1 through the jet nozzle 25, forming a closed-loop high-temperature gas circulation circuit. The high-temperature gas sent into the inner cavity of the left end of the paint stripping drum 1 can uniformly preheat the aluminum cans to be processed as soon as they enter the drum. Based on the basic principle of thermal desorption of organic paint film, the waste paint film on the surface of the aluminum can needs to reach the corresponding thermal decomposition temperature to achieve efficient removal. The preheating process can quickly raise the temperature of the cold-fed aluminum can to the critical temperature range of thermal desorption of the paint film, eliminate the temperature fluctuation in the inner cavity of the paint stripping drum 1 caused by cold material feeding, and shorten the time for the aluminum can to reach the effective paint stripping temperature. The residence time is reduced to improve the continuous paint stripping efficiency of the whole machine. The above-mentioned airflow circulation process realizes the cascade utilization of the waste heat of the high-temperature desorption tail gas in the paint stripping drum 1. The sensible heat of the high-temperature waste gas that was originally directly discharged to the air treatment device is converted into effective heat energy for preheating the cans to be treated, avoiding direct waste of heat energy, greatly improving the overall energy utilization efficiency of the device, and reducing the heating operation energy consumption of the whole machine. During the heat exchange and preheating process between the high-temperature gas and the cold can, part of the gas whose temperature drops after heat exchange (external air will also enter from the feed port at the left end of the paint stripping drum 1) will be transported to the subsequent gas treatment device through the exhaust pipe 6. The tail gas after heat exchange and cooling can eliminate the pre-cooling pretreatment process of high-temperature tail gas, significantly reducing the operating load and processing difficulty of the gas treatment device, and realizing the synergistic optimization of efficient waste heat recovery and utilization and harmless treatment of tail gas.

[0023] Example 2 Although the above embodiments can achieve synergistic optimization of efficient waste heat recovery and harmless treatment of exhaust gas, the following technical defects still exist in practical applications: When high-temperature gas enters the inner cavity of the paint stripping roller 1 from the inner cavity of the inlet ring groove cylinder 5, it only relies on raising the overall ambient temperature of the inner cavity at the left end of the paint stripping roller 1 to preheat the can by means of thermal radiation. The flow velocity of the high-temperature gas on the surface of the can is low and the flow disturbance is weak, which cannot form effective forced convection heat transfer, resulting in slow heating rate of the can, poor preheating uniformity, and poor overall preheating effect. This embodiment is invented to solve the above problems.

[0024] Please see Figures 1 to 6 Based on the above embodiments, the technical solution adopted includes pushing the end of the component away from the paint stripping roller 1 against the inner circumferential surface of the air inlet ring groove cylinder 5, and multiple blocking blocks 12 that can block the pushing component are provided at the bottom of the inner circumferential surface of the air inlet ring groove cylinder 5. The pushing component includes two inner sealing barrels 9, a connecting sealing plate 10 slidably connected to the inner wall of the inner sealing barrel 9, and an outer sealing plate 8 whose one end can abut against the inner circumferential surface of the air intake ring groove cylinder 5. A plurality of first springs 11, one end of which is set on the inner side surface of the inner sealing barrel 9, are fixedly connected to the end of the connecting sealing plate 10 near the paint stripping roller 1. The end of the connecting sealing plate 10 away from the paint stripping roller 1 is fixedly connected to the corresponding outer sealing plate 8. A telescopic component is provided between the two inner sealing barrels 9. The first spring 11 is pre-compressed and stored in energy in the initial state after assembly. It can continuously release the stored elastic potential energy through its own elastic restoring force, thereby stabilizing and pushing the connecting sealing plate 10. The connecting sealing plate 10 drives the outer sealing plate 8 to move synchronously, so that the end face of the outer sealing plate 8 away from the paint stripping roller 1 closely abuts against the corresponding mating end face of the air inlet ring groove cylinder 5. One of the two inner sealing barrels 9 is fixedly connected to the paint stripping roller 1 at one end, and the other inner sealing barrel 9 is always in contact with the paint stripping roller 1 at one end. The left and right ends of the inner sealing barrel 9, the connecting sealing plate 10 and the outer sealing plate 8 are all in contact with the inner side of the air intake ring groove cylinder 5. Thus, through the coordinated sealing cooperation of the inner sealing barrel 9, the connecting sealing plate 10 and the outer sealing plate 8, a reliable composite sealing structure can be formed between each adjacent pushing space in the air intake ring groove cylinder 5, effectively blocking gas flow between cavities and ensuring the independence of each pushing space and pressure stability.

[0025] The telescopic component includes a guide limiting cylinder 13 with one end fixedly connected to the side of one of the inner sealing cylinders 9 and a guide limiting rod 14 with one end fixedly connected to the side of the other inner sealing cylinder 9. The other end of the guide limiting rod 14 is slidably connected to the inner wall of the guide limiting cylinder 13, and a second spring 15 with one end set on the guide limiting rod 14 is fixedly connected to the inner side of the guide limiting cylinder 13.

[0026] by Figure 2 With the view shown as a reference, the paint stripping roller 1 rotates clockwise around its own axis. The inner sealing barrel 9, which is fixedly connected to the guide limiting cylinder 13, is fixedly assembled on the outer circumferential surface of the paint stripping roller 1. One end of the inner sealing barrel 9, which is fixedly connected to the guide limiting rod 14, slides against the outer circumferential surface of the paint stripping roller 1 (the movable inner sealing barrel 9 is a floating inner sealing barrel 9). When the paint stripping roller 1 rotates clockwise (with...) Figure 2(The shown view is for reference only). Through the cooperation of the telescopic linkage assembly consisting of the guide limiting cylinder 13, the second spring 15, and the guide limiting rod 14, the inner sealing barrel 9 fixed on the paint stripping roller 1 can drive the corresponding floating inner sealing barrel 9 to move synchronously in the circumferential direction. The connecting sealing plates 10 and the outer sealing plates 8 correspondingly set on the two inner sealing barrels 9 synchronously follow the movement to complete the circumferential displacement. When one end of the outer sealing plate 8 corresponding to the floating inner sealing barrel 9 abuts against the blocking block 12 on the inner wall of the air intake ring groove cylinder 5, the outer sealing plate 8 is mechanically limited in the circumferential direction by the blocking block 12, and the corresponding floating inner sealing barrel 9 is synchronously limited and stops moving in the circumferential direction. At this time, the guide limiting cylinder 13, which continues to rotate with the paint stripping roller 1, and the guide limiting rod 14 continuously squeeze the second spring 15, causing the second spring 15 to enter a compressed energy storage state. At the same time, under the continuous pushing action of the guide limiting cylinder 13, the floating inner sealing barrel 9, under the action of the continuously increasing elastic thrust of the second spring 15, its The corresponding outer sealing plate 8 moves radially in a direction close to the paint stripping roller 1 along the contour guide surface of the blocking block 12, thereby driving the corresponding connecting sealing plate 10 to squeeze the first spring 11, completing the pre-compression energy storage in the radial direction. Under the continuous push of the guide limiting cylinder 13, when the thrust on the outer sealing plate 8 overcomes the limiting resistance of the blocking block 12 and reaches the obstacle crossing threshold, the outer sealing plate 8 instantly crosses the limiting end face of the blocking block 12. At this time, the first spring 11 and the second spring 15 synchronously and instantaneously release all the pre-stored elastic potential energy. Based on the instantaneous energy release characteristics of the pre-compression energy storage of the elastic element, the elastic potential energy released by the first spring 11 pushes the outer sealing plate 8 to quickly reset, so that it is tightly pressed against the inner circumferential surface of the air intake ring groove cylinder 5 again, maintaining the sealing performance of the pushing space throughout the process. The elastic potential energy released by the second spring 15 pushes the guide limiting rod 14, driving the corresponding floating inner sealing barrel 9 to move instantaneously at high speed in the internal cavity of the air intake ring groove cylinder 5. Based on the fundamental principle of volumetric fluid transport, the instantaneous change in the volume of a sealed cavity will create a significant positive and negative pressure difference. The aforementioned high-speed instantaneous action can cause a rapid and significant change in the volume of adjacent pushing spaces, thereby creating a dual effect of instantaneous high-pressure extrusion and negative-pressure extraction on the corresponding pushing spaces (the space between the two inner sealed barrels 9 is for extraction, while the rapid movement of the floating inner sealed barrel 9 is for extrusion), generating a pulsed airflow with high velocity and high disturbance. Based on the boundary layer enhancement theory of convective heat transfer, this pulsed high-speed airflow can effectively break the laminar heat transfer boundary layer on the surface of the can, significantly improving the convective heat transfer coefficient between the high-temperature gas and the surface of the can, fundamentally solving the technical defects of low gas velocity, weak disturbance, and poor preheating effect in the previous embodiment. At the same time, in conjunction with the directional pushing of the airflow, it further enhances the uniform heating effect and preheating efficiency of the can. Simultaneously, with the directional push of airflow, it can promote the high-temperature airflow to form a full and efficient flow on the outer surface of the can and in the gap between adjacent cans, which greatly enhances the heat exchange efficiency between the high-temperature airflow and the can, thereby achieving rapid preheating of the can. When the inner sealing barrel 9, which is fixed on the outer circumference of the paint stripping roller 1, rotates continuously with the paint stripping roller 1, one end of the corresponding outer sealing plate 8 will also abut against the blocking block 12. As a result, the outer sealing plate 8 will also push the corresponding connecting sealing plate 10 to squeeze the first spring 11. Therefore, after the outer sealing plate 8 passes the blocking block 12, the elastic potential energy released by the first spring 11 will also reset the outer sealing plate 8.

[0027] Example 3 Although the above embodiment can drive the high-temperature airflow to flow fully and efficiently on the outer surface of the can and in the gap between adjacent cans by setting the pushing component, which can significantly enhance the heat exchange efficiency between the airflow and the can and achieve rapid preheating of the can, this solution has obvious technical defects: the airflow sprayed from the jet nozzle 25 into the paint stripping roller 1 can only cover the stationary position of the can in the roller (i.e. the area where the can stays at the bottom of the paint stripping roller 1), which makes the range of preheating of the can extremely limited, with a large number of heating blind spots, and cannot achieve uniform preheating of the entire surface of the can. This embodiment is invented to solve the above problems.

[0028] Please see Figures 1 to 6 Based on the above embodiments, the technical solution adopted includes a drive fan blade 22 that can provide power to the driven barrel 16 at one end of the inner circumferential surface of the jet nozzle 25 near the air intake ring groove cylinder 5, a plurality of inclined openings 19 on the side of the driven barrel 16 away from the paint stripping roller 1, a plurality of actuating columns 17 fixedly connected to the end of the driven barrel 16 away from the paint stripping roller 1, and actuating block 18 fixedly connected to the end of the actuating column 17 away from the driven barrel 16, wherein the actuating block 18 is made of high temperature resistant rubber; A limiting ring plate 20 is fixedly connected to one end of the outer circumference of the driven barrel 16 near the inner circumference of the air intake ring groove 5. The limiting ring plate 20 is rotatably connected inside the paint stripping roller 1. Thus, the limiting structure of the limiting ring plate 20 can effectively constrain the circumferential rotation of the driven barrel 16 on the inner circumference side of the jet nozzle 25, preventing relative deflection between the driven barrel 16 and the jet nozzle 25, and ensuring the stability of the airflow jet direction. A first auxiliary limiting plate 21 is fixedly connected to one end of the inner circumference of the jet nozzle 25 near the air intake ring groove 5. The middle part of the first auxiliary limiting plate 21 is fixed. A first rotating shaft is fixedly connected, and a drive fan blade 22 is fixedly connected to the middle of the first rotating shaft. A second auxiliary limiting plate 23 is fixedly connected to the end of the first rotating shaft away from the first auxiliary limiting plate 21. Both ends of the second auxiliary limiting plate 23 are fixedly connected to the inner circumferential surface of the driven barrel 16. The first auxiliary limiting plate 21 and the second auxiliary limiting plate 23 are both long strip structures. This structure occupies only a very small flow section inside the jet nozzle 25 and will not block or interfere with the flow path of the gas through the jet nozzle 25, thus ensuring the normal transport efficiency of the airflow. Therefore, when the high-temperature gas forms a high-speed flow through the jet nozzle 25 under the pulse-type rapid extrusion and extraction conditions, the impact of the high-speed airflow will drive the drive fan blade 22 to rotate circumferentially. The rotational motion of the drive fan blade 22 is synchronously transmitted to the second auxiliary limiting plate 23 through the first rotating shaft, causing the second auxiliary limiting plate 23 and the driven barrel 16 to rotate synchronously circumferentially. Then, through the actuating column 17 fixed at the end of the driven barrel 16, the actuating block 18 is driven to rotate synchronously circumferentially. During rotation, the agitator 18 will continuously rub against and mechanically move against the surface of the can inside the paint stripping roller 1, causing the can to rotate autonomously or shift slightly. This completely breaks the limitation that the can can only remain stationary at the bottom of the paint stripping roller 1. At the same time, the inclined port 19, which rotates synchronously with the driven barrel 16, changes its airflow direction circumferentially with the rotation of the driven barrel 16, achieving scanning spraying on the surface of the can. On the one hand, the autonomous rotation of the can allows the entire circumferential surface of the can to enter the airflow heat exchange area, fundamentally eliminating the circumferential heating blind zone caused by fixed-point static heating, and achieving uniform heating of the entire surface of the can. On the other hand, the dynamic scanning airflow spray can continuously impact and renew the laminar heat exchange boundary layer on the surface of the can, greatly improving the convective heat transfer coefficient. At the same time, combined with the disturbance and penetration of the airflow between adjacent cans, the preheating coverage of the can is significantly expanded, greatly improving the uniformity and heat exchange efficiency of preheating, and achieving a better preheating effect for the can. Simultaneously, under the condition of pulsed rapid gas extraction of high-temperature gas, some of the inclined ports 19 on the driven barrel 16 are in a state of reverse air intake into the inner cavity of the driven barrel 16. Only the remaining inclined ports 19 can spray high-temperature airflow into the inner cavity of the paint stripping roller 1. Therefore, at the same time, only some of the cans at the bottom of the paint stripping roller 1 can be directly covered and heated by the high-temperature airflow ejected from the inclined ports 19. Although only some of the cans are within the airflow heating coverage at the same time, the paint stripping roller 1 is always in a state of continuous rotation around its own axis. As the roller continues to rotate, the cans remaining in the paint stripping roller... The bottom of the cans will be continuously replaced, so that all the cans to be processed can enter the airflow heating coverage area in sequence during the axial conveying process in the paint stripping roller 1, and receive direct injection preheating of high temperature airflow. This dynamic circulation heating mode can effectively make up for the limited instantaneous heating coverage under pulse air extraction conditions, ensuring that all batches of cans to be processed can obtain a uniform and stable preheating effect, completely eliminating the problems of insufficient preheating of a single can and large differences in preheating effect between batches, and providing a stable and reliable temperature basis for the efficient thermal desorption of the paint film on the surface of the cans.

[0029] In summary, when this electromagnetic heating paint stripping device for recycling aluminum cans is used, the aluminum cans to be processed are continuously and stably fed into the inner cavity of the paint stripping drum 1 through the feeding component coaxially arranged at the left end of the paint stripping drum 1. The drive component starts synchronously, and through the meshing transmission of the drive gear and the drive gear ring, the paint stripping drum 1 is driven to rotate smoothly around its own axis on the support component. At the same time, the electromagnetic heating coil wound on the outer circumference of the paint stripping drum 1 is energized and works, and the drum wall of the paint stripping drum 1 is uniformly heated through the electromagnetic induction effect. Then, the heat conduction through the drum wall heats the aluminum cans entering the inner cavity, realizing the thermal desorption of waste organic paint film on the surface of the aluminum can. The high-temperature fan inside the fan installation box 4 is started synchronously to draw the high-temperature gas generated after the paint stripping operation from the inner cavity of the right end of the paint stripping drum 1. The high-temperature gas enters the annular groove cavity of the suction ring groove cylinder 2 through the third connecting port, and is then transported to the inner cavity of the inlet ring groove cylinder 5 through the connecting pipe 3. Finally, it is sent back to the inner cavity of the left end of the paint stripping drum 1 through the jet nozzle 25, forming a closed-loop high-temperature gas circulation circuit. This realizes the cascade recovery and utilization of the waste heat of the paint stripping tail gas, which greatly improves the overall energy utilization efficiency of the device. The gas whose temperature has decreased after heat exchange with the cold aluminum can is transported to the subsequent gas treatment device through the gas outlet pipe 6, which simultaneously realizes the harmless treatment of the tail gas and effectively reduces the operating load of the tail gas treatment device. During the continuous rotation of the paint stripping roller 1, the circumferentially evenly distributed pushing components move synchronously with the roller. Through the limiting cooperation with the bottom blocking block 12 on the inner circumferential surface of the air inlet ring groove cylinder 5, the inner sealing barrel 9 and the outer sealing plate 8 are driven to complete radial expansion and contraction and instantaneous high-speed circumferential movement. This causes a rapid and significant change in the volume of the adjacent pushing space in the air inlet ring groove cylinder 5, generating a pulsed high-speed airflow with high velocity and high disturbance. This effectively breaks the laminar heat transfer boundary layer on the surface of the can, greatly improves the convective heat transfer efficiency between the high-temperature airflow and the can, and achieves rapid and efficient preheating of the feed can. When the high-speed airflow flows through the jet nozzle 25, it synchronously drives the fan blade 22 to rotate circumferentially. The rotational power is synchronously transmitted to the driven barrel 16 through the first rotating shaft and the second auxiliary limiting plate 23, causing the driven barrel 16 to rotate synchronously circumferentially. On the one hand, through the actuating column 17 and actuating block 18 fixed at the end of the driven barrel 16, it forms continuous frictional contact and mechanical actuation with the surface of the can, driving the can to generate autonomous circumferential rotation and slight displacement, completely breaking the limitation that the can can only stay at the bottom of the paint stripping roller 1 in a stationary position. On the other hand, the inclined nozzle 19 that rotates synchronously with the driven barrel 16 forms a circumferential dynamic scanning airflow jet. Combined with the continuous rotation of the paint stripping roller 1, which causes the cans at the bottom of the roller to be replaced, it ensures that all the cans to be processed can achieve uniform preheating without dead angles during the axial conveying process, completely eliminating the heating blind zone and ensuring the uniformity and stability of the preheating effect of the entire batch of cans. As the aluminum cans inside the paint stripping drum 1 rotate synchronously with the drum, they are guided and pushed by the inclined guide plates 7 evenly distributed on the inner wall, and continuously move smoothly to the right end along the axial direction of the drum 1. After completing the preheating and paint film thermal desorption processes, they are continuously discharged from the right end of the drum 1 to the next process. This ultimately achieves continuous, automated, and low-energy-consumption operation for the recycling and paint stripping of waste aluminum cans. At the same time, this electromagnetic heating aluminum can recycling paint stripping device effectively solves the technical defects of existing aluminum can paint stripping devices, such as poor preheating effect, low energy utilization rate, insufficient heating uniformity, and unstable paint stripping effect, through the coordinated operation of multiple structures, including electromagnetic induction heating, closed-loop airflow waste heat recovery, pulse-type enhanced convection heat transfer, and airflow-driven aluminum can rotation for uniform preheating. It has excellent industrial application value.

[0030] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A paint stripping device for recycling electromagnetically heated beverage cans, comprising a paint stripping roller (1), characterized in that: The left end of the outer circumference of the paint stripping roller (1) is rotatably connected to an air intake ring groove (5) that can communicate with the paint stripping roller (1), and the right end of the outer circumference of the paint stripping roller (1) is rotatably connected to an air intake ring groove (2) that can communicate with the paint stripping roller (1). A connecting component for connecting the two is provided between the air intake ring groove (5) and the air intake ring groove (2). Multiple air jets (25) are evenly provided on the left end of the outer circumference of the paint stripping roller (1). Multiple telescopic pushing components are evenly provided circumferentially at the position where the left end of the outer circumference of the paint stripping roller (1) is wrapped by the air intake ring groove (5). Each of the multiple air jets (25) is provided with a driven barrel (16) that can cause the can entering the paint stripping roller (1) to rotate. Multiple inclined guide plates (7) are evenly provided on the inner circumference of the paint stripping roller (1).

2. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 1, characterized in that: Multiple support components are provided along the axial direction directly below the intake ring groove (2), and an exhaust pipe (6) is provided at the right end of the outer circumference of the intake ring groove (5).

3. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 2, characterized in that: The connecting component includes a connecting pipe (3) fixedly connected to the outer circumferential surface of the intake ring groove (2) and the outer circumferential surface of the intake ring groove (5). A fan mounting box (4) is provided at the right end of the connecting pipe (3). A high-temperature resistant fan is installed in the fan mounting box (4). Multiple support rods (24) are fixedly connected to both the front and rear sides of the connecting pipe (3). The end of the support rod (24) away from the connecting pipe (3) is fixedly connected to the support component.

4. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 3, characterized in that: The left end of the outer circumference of the air intake ring groove (5) is provided with a first communication port that enables the connecting pipe (3) to connect with the air intake ring groove (5). The outer circumference of the air intake ring groove (2) is provided with a second communication port that enables the connecting pipe (3) to connect with the air intake ring groove (2). The right end of the outer circumference of the paint stripping roller (1) is provided with multiple third communication ports at the position corresponding to the air intake ring groove (2).

5. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 4, characterized in that: The end of the pushing component away from the paint stripping roller (1) abuts against the inner circumferential surface of the air intake ring groove (5), and a plurality of blocking blocks (12) that can block the pushing component are provided at the bottom of the inner circumferential surface of the air intake ring groove (5).

6. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 5, characterized in that: The pushing component includes two inner sealing barrels (9), a connecting sealing plate (10) slidably connected to the inner wall of the inner sealing barrel (9), and an outer sealing plate (8) with one end able to abut against the inner circumferential surface of the air intake ring groove (5). The connecting sealing plate (10) near the paint stripping roller (1) is fixedly connected to a plurality of first springs (11) with one end set on the inner side of the inner sealing barrel (9). The connecting sealing plate (10) away from the paint stripping roller (1) is fixedly connected to the corresponding outer sealing plate (8). A telescopic component is provided between the two inner sealing barrels (9).

7. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 6, characterized in that: One of the two inner sealing barrels (9) is fixedly connected to the paint stripping roller (1) at one end, and the other inner sealing barrel (9) is always in contact with the paint stripping roller (1) at one end. The left and right ends of the inner sealing barrel (9), the connecting sealing plate (10) and the outer sealing plate (8) are all in contact with the inner side of the air intake ring groove (5).

8. The paint stripping device for electromagnetic heating aluminum can recycling according to claim 7, characterized in that: The telescopic component includes a guide limiting cylinder (13) with one end fixedly connected to the side of one of the inner sealing cylinders (9) and a guide limiting rod (14) with one end fixedly connected to the side of the other inner sealing cylinder (9). The other end of the guide limiting rod (14) is slidably connected to the inner wall of the guide limiting cylinder (13), and a second spring (15) with one end set on the guide limiting rod (14) is fixedly connected to the inner side of the guide limiting cylinder (13).

9. A paint stripping device for recycling electromagnetically heated aluminum cans according to claim 8, characterized in that: The inner circumferential surface of the jet nozzle (25) near the end of the air intake ring groove (5) is provided with a drive fan blade (22) that can provide power to the driven barrel (16). The driven barrel (16) has multiple inclined openings (19) on the side away from the paint stripping roller (1). Multiple actuating pins (17) are fixedly connected to the end of the driven barrel (16) away from the paint stripping roller (1). Actuating block (18) is fixedly connected to the end of the actuating pin (17) away from the driven barrel (16).

10. A paint stripping device for recycling electromagnetically heated beverage cans according to claim 9, characterized in that: One end of the outer circumference of the driven barrel (16) near the inner circumference of the air intake ring groove (5) is fixedly connected to a limiting ring plate (20). The limiting ring plate (20) is rotatably connected inside the paint stripping roller (1). One end of the inner circumference of the jet nozzle (25) near the air intake ring groove (5) is fixedly connected to a first auxiliary limiting plate (21). The middle part of the first auxiliary limiting plate (21) is fixedly connected to a first rotating shaft. The driving fan blade (22) is fixedly connected to the middle part of the first rotating shaft. One end of the first rotating shaft away from the first auxiliary limiting plate (21) is fixedly connected to a second auxiliary limiting plate (23). Both ends of the second auxiliary limiting plate (23) are fixedly connected to the inner circumference of the driven barrel (16).

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