Automatic paint removing system based on pop can secondary aluminum and control method of automatic paint removing system

Abstract

The invention discloses an automatic paint removing system based on pop can secondary aluminum and a control method thereof.The automatic paint removing system comprises a double-layer thermal radiation paint removing roller, the double-layer thermal radiation paint removing roller is arranged on a system frame and driven by a motor to rotate, and a double-bin feeding channel is arranged at the feeding end of the double-layer thermal radiation paint removing roller; the double-bin discharging channel is arranged at the discharging end of the double-layer heat radiation paint removing roller, the waste gas combustion chamber is communicated with the double-layer heat radiation paint removing roller through the heat energy recycling and circulating mechanism, and the cyclone separator is arranged on the double-layer heat radiation paint removing roller and connected with the heat energy recycling and circulating mechanism. According to the paint removing system, paint removing treatment is conducted on the waste ring-pull cans in a heat energy recycling mode, the paint removing efficiency and quality are improved in a heat radiation and reverse blowing heat convection mode, heat energy is recycled through waste gas combustion, and the total energy consumption of the paint removing system is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of paint stripping for aluminum cans, and particularly relates to an automated paint stripping system based on recycled aluminum of aluminum cans and a control method thereof. Background Art

[0002] With the increasing awareness of environmental protection, the recycling and reuse of waste aluminum cans have become the focus of social attention. During the recycling process of waste aluminum cans, the paint layer on their surface not only affects subsequent processing but may also cause environmental pollution. Therefore, aluminum can paint stripping equipment plays a crucial role in the waste aluminum can recycling industry chain. Aluminum can paint stripping equipment plays a crucial role in the disposal of paint stripping for waste aluminum cans. Through the paint stripping treatment, the paint layer on the surface of waste aluminum cans is peeled off, providing convenience for subsequent processing and utilization. The paint stripping treatment reduces the environmental pollution caused by waste aluminum cans and meets the environmental protection requirements.

[0003] The existing aluminum can paint stripping system pyrolyzes the paint layer on the surface of waste aluminum cans through heating. However, in the entire aluminum can paint stripping system, the heat energy recovery and utilization effect after pyrolyzing waste aluminum cans is not good, and the heat energy recovery utilization rate is low. As a result, the energy consumption loss of the aluminum can paint stripping system is large, and the harmful gases generated by the aluminum can paint stripping system cannot be effectively treated, failing to meet the environmental protection requirements for waste gas emissions. For this reason, we propose an automated paint stripping system based on recycled aluminum of aluminum cans and a control method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide an automated paint stripping system based on recycled aluminum of aluminum cans and a control method thereof to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automated paint stripping system based on recycled aluminum of aluminum cans, including, A double-layer thermal radiation paint stripping drum, which is arranged on the system framework. The double-layer thermal radiation paint stripping drum is driven by a motor to rotate and continuously thermally decomposes the oil and gas layer on the surface of waste aluminum cans in a thermal radiation manner; A double-bin feeding channel, which is arranged at the feeding end of the double-layer thermal radiation paint stripping drum. The double-bin feeding channel is used to achieve the sealed feeding of waste aluminum cans; A double-bin discharging channel, which is arranged at the discharging end of the double-layer thermal radiation paint stripping drum. The double-bin discharging channel is used to achieve the sealed discharging of the paint-stripped waste aluminum cans; An exhaust gas combustion chamber, which is connected to the double-layer thermal radiation paint stripping drum through a heat energy recovery circulation mechanism. The heat energy recovery circulation mechanism is used to circulate the exhaust gas generated inside the double-layer thermal radiation paint stripping drum to the exhaust gas combustion chamber. The exhaust gas combustion chamber is used to burn and process the exhaust gas, and recover the heat energy generated by the exhaust gas combustion chamber to the double-layer thermal radiation paint stripping drum through the heat energy recovery circulation mechanism; A cyclone separator, which is arranged on the double-layer thermal radiation paint stripping drum and connected to the heat energy recovery circulation mechanism. The cyclone separator is used to cyclone-separate and clean the dust particles in the exhaust gas generated inside the double-layer thermal radiation paint stripping drum.

[0006] Preferably, the inside of the double-layer thermal radiation paint stripping drum is in a slightly negative pressure state, and the negative pressure inside the double-layer thermal radiation paint stripping drum is -5 mbar.

[0007] Preferably, the double-layer thermal radiation paint stripping drum includes an outer cylinder body and an inner cylinder body; The outer cylinder body is rotatably arranged on the system frame through rollers, and is rotatably connected to the feeding end and the discharging end of the double-layer thermal radiation paint stripping drum. The inner cylinder body is arranged at the inner center of the outer cylinder body, and one end of the inner cylinder body extends out of the feeding end of the double-layer thermal radiation paint stripping drum and is connected to the heat energy recovery circulation mechanism; An arc-shaped back blowing seat is arranged inside the outer cylinder body corresponding to the discharging end of the double-layer thermal radiation paint stripping drum. The other end of the inner cylinder body is distributed in alignment with the arc-shaped back blowing seat, and the inner cylinder body and the arc-shaped back blowing seat do not contact; Spiral feeding plates are arranged on the inner side wall of the outer cylinder body at equal intervals.

[0008] Preferably, the double-bin feeding channel includes a feeding housing, a feeding hopper, a first telescopic cylinder, a first rotary seal plate, a second telescopic cylinder and a second rotary seal plate; The feeding housing is arranged at the feeding end of the double-layer thermal radiation paint stripping drum. The feeding hopper is arranged at the bottom of the feeding housing. The first rotary seal plate and the second rotary seal plate are respectively rotatably arranged at the upper and lower parts inside the feeding housing through a rotating shaft and a bearing. The first telescopic cylinder and the second telescopic cylinder are respectively arranged at the positions outside the feeding housing corresponding to the first rotary seal plate and the second rotary seal plate, and the output ends of the first telescopic cylinder and the second telescopic cylinder are respectively connected to the rotating shafts on the first rotary seal plate and the second rotary seal plate through connecting rods; Inclined first abutting plates are arranged at the positions corresponding to the first rotary seal plate and the second rotary seal plate inside the feeding housing. A feeding double-bin structure is formed between the first rotary seal plate, the second rotary seal plate and the first abutting plate.

[0009] Preferably, the double-bin blanking channel includes a blanking housing, a blanking hopper, a third telescopic cylinder, a third rotary seal plate, a fourth telescopic cylinder, a fourth rotary seal plate, a fifth telescopic cylinder and a fifth rotary seal plate; The blanking housing is arranged at the blanking end of the double-layer heat radiation paint stripping drum. There are two blanking hoppers, and the two blanking hoppers are symmetrically arranged at the bottom of the blanking housing. The third rotary seal plate and the fourth rotary seal plate are respectively rotatably arranged at the upper and lower parts inside the blanking housing through a rotating shaft and a bearing. The third telescopic cylinder and the fourth telescopic cylinder are respectively arranged at the positions outside the blanking housing corresponding to the third rotary seal plate and the fourth rotary seal plate, and the output ends of the third telescopic cylinder and the fourth telescopic cylinder are respectively connected to the rotating shafts on the third rotary seal plate and the fourth rotary seal plate through connecting rods. Second abutting plates are arranged at the positions corresponding to the third rotary seal plate and the fourth rotary seal plate inside the blanking housing. A blanking double-bin structure is formed between the third rotary seal plate, the fourth rotary seal plate and the second abutting plate; The fifth rotary seal plate is arranged in the blanking hopper through a rotating shaft and a bearing. The fifth telescopic cylinder is arranged at the position outside the blanking hopper corresponding to the fifth rotary seal plate, and the output end of the fifth telescopic cylinder is connected to the rotating shaft on the fifth rotary seal plate through a connecting rod.

[0010] Preferably, the waste gas combustion chamber includes a waste gas combustion housing, a combustion gas chamber ring, an ignition nozzle and a guide plate; The waste gas combustion housing is connected to the heat energy recovery circulation mechanism. There are several combustion gas chamber rings, and the several combustion gas chamber rings are equidistantly arranged inside the waste gas combustion housing. The several combustion gas chamber rings are externally connected to a combustion gas delivery system, and several ignition nozzles are connected to the inner side of each combustion gas chamber ring; There are several guide plates, and the several guide plates are alternately distributed up and down on the inner side of the waste gas combustion housing.

[0011] Preferably, the heat energy recovery circulation mechanism includes a circulation fan, a waste gas delivery pipe and a heat energy recovery delivery pipe; The input end of the circulation fan is connected to the cyclone separator through the waste gas delivery pipe, the output end of the circulation fan is connected to the input end of the waste gas combustion housing through the waste gas delivery pipe, and the output end of the waste gas combustion housing is connected to the inner cylinder through the heat energy recovery delivery pipe.

[0012] Preferably, the cyclone separator includes a cyclone separation housing, a dust hopper, a waste gas inlet port, a fixed bracket and a rotary separation column; The cyclone separation housing is arranged at the feeding end of the double-layer thermal radiation paint stripping drum through the waste gas inlet port. The ash hopper is arranged at the bottom of the cyclone separation housing. The rotating separation column is rotatably arranged in the cyclone separation housing at a position corresponding to the waste gas inlet port through the fixed bracket. The outer side of the rotating separation column is provided with annularly distributed separation notches.

[0013] Preferably, an arc-shaped guiding plate is arranged in the cyclone separation housing at a position corresponding to the rotating separation column, and a slope ash discharging ring is arranged at the lower part inside the cyclone separation housing.

[0014] A control method for an automatic paint stripping system based on recycled aluminum from aluminum cans includes the following steps: A. Feeding of waste aluminum cans: The waste aluminum cans are conveyed into the feeding housing. At this time, both the first rotating sealing plate and the second rotating sealing plate are in abutting seal with the first abutting plate. When the specified amount of waste aluminum cans is conveyed in the feeding housing, then the first telescopic cylinder extends, drives the rotating shaft to rotate through the connecting rod, and further makes the first rotating sealing plate rotate and open, so that the waste aluminum cans fall between the first rotating sealing plate and the second rotating sealing plate. Then, the first rotating sealing plate contracts to drive the first rotating sealing plate to rotate and close. Then, the second telescopic cylinder extends, drives the rotating shaft to rotate through the connecting rod, makes the second rotating sealing plate rotate and open, and makes the waste aluminum cans fall into the feeding end in the double-layer thermal radiation paint stripping drum through the feeding hopper; B: Paint stripping treatment of waste aluminum cans: Then, the outer cylinder is driven to rotate by the motor, and the waste aluminum cans are gradually spirally conveyed to the discharging end through the spiral feeding plate. During this process, the inner cylinder recovers and utilizes the heat energy generated by the waste gas combustion chamber through the heat energy recovery and circulation mechanism, so that the heat energy is first conveyed from the feeding end to the discharging end through the inner cylinder, and the heat energy is blown back between the outer cylinder and the inner cylinder through the arc-shaped back blowing seat. The heat energy then moves from the discharging end to the feeding end, and through the thermal radiation of the inner cylinder, the thermal decomposition of the oil and gas layer on the surface of the waste aluminum cans is completed; C: Waste gas and dust separation: During the thermal decomposition of the waste aluminum cans, waste gas is pyrolyzed. The waste gas is between the outer cylinder and the inner cylinder. At this time, the circulating fan sucks it into the cyclone separator through the waste gas conveying pipe. The waste gas is blown onto the arc-shaped guiding plate through the waste gas inlet port, so that the waste gas is guided to the rotating separation column. During the rotation of the rotating separation column on the fixed bracket, the dust in the waste gas is separated and discharged through the ash hopper; D. Waste gas combustion treatment: Next, the circulating fan sucks the waste gas separated from the dust by the cyclone separator into the waste gas combustion chamber through the waste gas conveying pipe, then conveys the combustion gas to the combustion gas chamber ring through the combustion gas conveying system, and ignites it through the ignition nozzle. At this time, the waste gas moves through the guide plate in the waste gas combustion shell, and the waste gas is burned by the flame generated by the ignition nozzle, so that the waste gas is effectively burned and treated to meet the emission standards; E. Heat energy recovery and utilization: The heat energy generated by the combustion treatment of the waste gas in the waste gas combustion shell is conveyed to the inner cylinder through the heat energy recovery conveying pipe, so that the heat energy generated by the combustion of the waste gas is recycled; F. Feeding of degreased waste aluminum cans: The degreased waste aluminum cans between the outer cylinder and the inner cylinder are spirally conveyed and dropped onto the third rotating seal plate in the feeding housing. Then, the third telescopic cylinder extends, drives the rotating shaft to rotate through the connecting rod, and further rotates and opens the third rotating seal plate. The degreased waste aluminum cans fall between the third rotating seal plate and the fourth rotating seal plate. Then, the third telescopic cylinder contracts to close the third rotating seal plate. Then, the fourth telescopic cylinder extends, drives the rotating shaft to rotate through the connecting rod, rotates and opens the fourth rotating seal plate. The degreased waste aluminum cans fall onto the fifth rotating seal plate in the two feeding hoppers. Then, the fourth telescopic cylinder contracts to close the fourth rotating seal plate. Then, the fifth telescopic cylinder extends, drives the rotating shaft to rotate through the connecting rod, rotates and opens the fifth rotating seal plate. The degreased waste aluminum cans are discharged from the feeding hopper. Then, the fifth telescopic cylinder contracts and the fifth rotating seal plate closes, completing the feeding operation of the degreased waste aluminum cans.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention is provided with a double-layer heat radiation degreasing drum, which adopts the relative rotational movement between the outer cylinder and the inner cylinder, so that the waste aluminum cans are spirally conveyed between the outer cylinder and the inner cylinder, and the heat energy is radiated through the inner cylinder to continuously thermally decompose the waste aluminum cans. The heat energy is back blown through the arc-shaped back blowing seat, so that the heat energy fills the entire inside of the double-layer heat radiation degreasing drum, so as to effectively degrease and dry the waste aluminum cans. The surface of the degreased waste aluminum cans is paint-free and smooth, greatly improving the metal recovery rate of the waste aluminum cans and reducing the metal loss of the waste aluminum cans. In this degreasing system, the heat energy recovery and utilization method is adopted inside the double-layer heat radiation degreasing drum, there is no open fire inside, low-temperature degreasing treatment is adopted to reduce metal loss, no water mist is generated during the process, and through the heat radiation of the inner cylinder and the back blowing heat convection transfer of the arc-shaped back blowing seat, the degreasing efficiency and quality are greatly improved; 2. The present invention is provided with a double-bin feeding channel and a double-bin discharging channel. When feeding and discharging the waste aluminum cans, a multi-bin separate switching structure is adopted to realize the sealing of the feeding and discharging of the waste aluminum cans, reduce the external overflow of heat energy during feeding and discharging, greatly reduce the heat energy loss of the degreasing system, and improve the heat energy utilization rate of the degreasing system; 3. The present invention is provided with an exhaust gas combustion chamber, which uses gas combustion treatment to completely incinerate the exhaust gas from pyrolysis gasification. The surface coatings of waste aluminum cans often contain organic or inorganic compounds, and often both. Through thermal degradation and / or oxidation, these complex compounds will be reduced to the most basic forms. For example, polypropylene degrades into carbon monoxide, carbon dioxide, hydrogen, and water vapor. All products discharged during the paint stripping process, except water vapor, are harmful to the environment. Therefore, they must be incinerated before being discharged into the atmosphere. By means of high-temperature flames and sufficient residence time, the regeneration of harmful organic compounds can be avoided, and the exhaust gas can be effectively treated to meet the emission standards and reduce the emission of harmful gases into the environment; 4. The present invention is provided with a heat energy recovery and circulation mechanism, which realizes the cyclic combustion of exhaust gas and the recovery and utilization of heat energy through a circulation fan, an exhaust gas delivery pipe, and a heat energy recovery delivery pipe, and reuses the energy released during the combustion of pyrolysis gas. Therefore, the total energy consumption of the paint stripping system is very low, which greatly reduces the energy consumption of the paint stripping system and improves the heat energy recovery utilization rate of the paint stripping system at the same time; 5. The present invention is provided with a cyclone separator, which separates and removes fine particles, such as fine powder and dust, in the exhaust gas, avoiding the recycling of exhaust gas combustion pyrolysis back into the double-layer thermal radiation paint stripping drum, ensuring that no dust and dirt are brought into the double-layer thermal radiation paint stripping drum, and guaranteeing the normal operation of the paint stripping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention; Figure 2 is a schematic three-dimensional structure diagram of the whole of the present invention; Figure 3 is a schematic three-dimensional structure diagram of the double-bin feeding channel of the present invention; Figure 4 is a schematic three-dimensional structure diagram of the double-bin feeding channel of the present invention; Figure 5 is a schematic partial cross-sectional three-dimensional structure diagram of the double-bin feeding channel of the present invention; Figure 6 is a schematic three-dimensional structure diagram of the double-bin discharging channel of the present invention; Figure 7 is a schematic three-dimensional structure diagram of the double-bin discharging channel of the present invention; Figure 8 is a schematic cross-sectional three-dimensional structure diagram of the double-bin discharging channel of the present invention; Figure 9 is a schematic three-dimensional structure diagram of the double-layer thermal radiation paint stripping drum of the present invention; Figure 10 is a schematic partial cross-sectional structure diagram of the double-layer thermal radiation paint stripping drum of the present invention; Figure 11Schematic three-dimensional structure diagram of the exhaust gas combustion chamber of the present invention; Figure 12 Schematic sectional structure diagram of the exhaust gas combustion chamber of the present invention; Figure 13 Schematic three-dimensional structure diagram of the cyclone separator of the present invention; Figure 14 Schematic sectional structure diagram of the cyclone separator of the present invention; Figure 15 Schematic sectional three-dimensional structure diagram of the cyclone separator of the present invention.

[0017] In the figure: 1. Double-layer thermal radiation paint stripping drum; 101. Outer cylinder body; 102. Inner cylinder body; 103. Arc-shaped back blowing seat; 104. Spiral feeding plate; 2. Double-bin feeding channel; 201. Feeding housing; 202. Feeding hopper; 203. First telescopic cylinder; 204. First rotating sealing plate; 205. Second telescopic cylinder; 206. Second rotating sealing plate; 207. First abutting plate; 3. Double-bin discharging channel; 301. Discharging housing; 302. Discharging hopper; 303. Third telescopic cylinder; 304. Third rotating sealing plate; 305. Fourth telescopic cylinder; 306. Fourth rotating sealing plate; 307. Fifth telescopic cylinder; 308. Fifth rotating sealing plate; 309. Second abutting plate; 4. Exhaust gas combustion chamber; 401. Exhaust gas combustion housing; 402. Combustion gas chamber ring; 403. Ignition nozzle; 404. Deflector; 5. Heat energy recovery and circulation mechanism; 501. Circulation fan; 502. Exhaust gas delivery pipe; 503. Heat energy recovery delivery pipe; 6. Cyclone separator; 601. Cyclone separation housing; 602. Ash hopper; 603. Exhaust gas inlet port; 604. Fixed bracket; 605. Rotating separation column; 606. Separation notch; 607. Arc-shaped guiding plate; 608. Sloping ash discharging ring. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 - 15 , the automated paint stripping system based on recycled aluminum from aluminum cans provided by the present invention includes Double-layer thermal radiation paint stripping drum 1 is arranged on the system frame. The double-layer thermal radiation paint stripping drum 1 is driven by a motor to rotate and continuously thermally decomposes the oil and gas layer on the surface of waste aluminum cans in a thermal radiation manner. The inside of the double-layer thermal radiation paint stripping drum 1 is in a slightly negative pressure state, and the negative pressure inside the double-layer thermal radiation paint stripping drum 1 is -5 mbar, which can generate suction to reduce the overflow of heat energy. The double-layer thermal radiation paint stripping drum 1 includes an outer cylinder 101 and an inner cylinder 102; the outer cylinder 101 is rotatably arranged on the system frame through rollers, and the outer cylinder 101 is rotatably connected to the feeding end and the discharging end of the double-layer thermal radiation paint stripping drum 1. The inner cylinder 102 is arranged at the central part inside the outer cylinder 101, and one end of the inner cylinder 102 extends out of the feeding end of the double-layer thermal radiation paint stripping drum 1 and is communicated with the heat energy recovery and circulation mechanism 5; an arc-shaped back blowing seat 103 is arranged inside the outer cylinder 101 corresponding to the discharging end of the double-layer thermal radiation paint stripping drum 1, and the other end of the inner cylinder 102 is distributed in alignment with the arc-shaped back blowing seat 103, and the inner cylinder 102 and the arc-shaped back blowing seat 103 do not contact; spiral feeding plates 104 are arranged on the inner side wall of the outer cylinder 101 at equal intervals; The present invention is provided with a double-layer thermal radiation paint stripping drum 1, which adopts the relative rotational movement between the outer cylinder 101 and the inner cylinder 102 to spirally convey the waste aluminum cans between the outer cylinder 101 and the inner cylinder 102, and conducts heat energy radiation through the inner cylinder 102. The temperature inside the double-layer thermal radiation paint stripping drum 1 is 350 - 530 °C, and the waste aluminum cans are continuously thermally decomposed. The heat energy is back blown through the arc-shaped back blowing seat 103 to fill the entire inside of the double-layer thermal radiation paint stripping drum 1, so as to effectively strip the paint and dry the waste aluminum cans. After paint stripping, the surface of the waste aluminum cans is paint-free and smooth. The metal recovery rate of the existing aluminum can paint stripping system is 85 - 90%, and the aluminum can metal recovery rate of this paint stripping system reaches more than 98%, greatly improving the metal recovery rate of waste aluminum cans and reducing the metal loss of waste aluminum cans. In this paint stripping system, the heat energy recovery and utilization method is adopted inside the double-layer thermal radiation paint stripping drum 1, there is no open fire inside, low-temperature paint stripping treatment is adopted to reduce metal loss, no water mist is generated during the process, and through the heat radiation of the inner cylinder 102 and the back blowing heat convection transfer of the arc-shaped back blowing seat 103, the paint stripping efficiency and quality are greatly improved; Double-bin feeding channel 2 is arranged at the feeding end of the double-layer thermal radiation paint stripping drum 1. The double-bin feeding channel 2 is used to achieve the sealed feeding of waste aluminum cans. The double-bin feeding channel 2 includes a feeding housing 201, a feeding hopper 202, a first telescopic cylinder 203, a first rotating sealing plate 204, a second telescopic cylinder 205 and a second rotating sealing plate 206. The feeding housing 201 is arranged at the feeding end of the double-layer thermal radiation paint stripping drum 1. The feeding hopper 202 is arranged at the bottom of the feeding housing 201. The first rotating sealing plate 204 and the second rotating sealing plate 206 are respectively rotatably arranged at the upper and lower parts inside the feeding housing 201 through a rotating shaft and a bearing. The first telescopic cylinder 203 and the second telescopic cylinder 205 are respectively arranged at the positions outside the feeding housing 201 corresponding to the first rotating sealing plate 204 and the second rotating sealing plate 206, and the output ends of the first telescopic cylinder 203 and the second telescopic cylinder 205 are respectively connected to the rotating shafts on the first rotating sealing plate 204 and the second rotating sealing plate 206 through connecting rods. At the positions corresponding to the first rotating sealing plate 204 and the second rotating sealing plate 206 inside the feeding housing 201, inclined first abutting plates 207 are arranged. A feeding double-bin structure is formed among the first rotating sealing plate 204, the second rotating sealing plate 206 and the first abutting plate 207. Double-bin discharging channel 3 is arranged at the discharging end of the double-layer thermal radiation paint stripping drum 1. The double-bin discharging channel 3 is used to achieve the sealed discharging of the waste aluminum cans after paint stripping. The double-bin discharging channel 3 includes a discharging housing 301, a discharging hopper 302, a third telescopic cylinder 303, a third rotating sealing plate 304, a fourth telescopic cylinder 305, a fourth rotating sealing plate 306, a fifth telescopic cylinder 307 and a fifth rotating sealing plate 308. The discharging housing 301 is arranged at the discharging end of the double-layer thermal radiation paint stripping drum 1. There are two discharging hoppers 302, and the two discharging hoppers 302 are symmetrically arranged at the bottom of the discharging housing 301. The third rotating sealing plate 304 and the fourth rotating sealing plate 306 are respectively rotatably arranged at the upper and lower parts inside the discharging housing 301 through a rotating shaft and a bearing. The third telescopic cylinder 303 and the fourth telescopic cylinder 305 are respectively arranged at the positions outside the discharging housing 301 corresponding to the third rotating sealing plate 304 and the fourth rotating sealing plate 306, and the output ends of the third telescopic cylinder 303 and the fourth telescopic cylinder 305 are respectively connected to the rotating shafts on the third rotating sealing plate 304 and the fourth rotating sealing plate 306 through connecting rods. At the positions corresponding to the third rotating sealing plate 304 and the fourth rotating sealing plate 306 inside the discharging housing 301, second abutting plates 309 are arranged. A discharging double-bin structure is formed among the third rotating sealing plate 304, the fourth rotating sealing plate 306 and the second abutting plate 309. The fifth rotating sealing plate 308 is arranged inside the discharging hopper 302 through a rotating shaft and a bearing. The fifth telescopic cylinder 307 is arranged at the position outside the discharging hopper 302 corresponding to the fifth rotating sealing plate 308, and the output end of the fifth telescopic cylinder 307 is connected to the rotating shaft on the fifth rotating sealing plate 308 through a connecting rod. The present invention is provided with a double-bin feeding channel 2 and a double-bin discharging channel 3. When feeding and discharging waste aluminum cans, a multi-bin separate switching structure is adopted to achieve the sealing of the feeding and discharging of waste aluminum cans, reduce the overflow of heat energy during feeding and discharging, greatly reduce the heat energy loss of the paint stripping system, and improve the heat energy utilization rate of the paint stripping system. An exhaust gas combustion chamber 4 is provided. The exhaust gas combustion chamber 4 and the double-layer heat radiation paint stripping drum 1 are connected through a heat energy recovery and circulation mechanism 5. The heat energy recovery and circulation mechanism 5 is used to circulate the exhaust gas generated in the double-layer heat radiation paint stripping drum 1 to the exhaust gas combustion chamber 4. The exhaust gas combustion chamber 4 is used to burn and process the exhaust gas, and recover the heat energy generated by the exhaust gas combustion chamber 4 to the double-layer heat radiation paint stripping drum 1 through the heat energy recovery and circulation mechanism 5. The exhaust gas combustion chamber 4 includes an exhaust gas combustion housing 401, a combustion gas chamber ring 402, an ignition nozzle 403, and a deflector 404. The exhaust gas combustion housing 401 is connected to the heat energy recovery and circulation mechanism 5. A plurality of combustion gas chamber rings 402 are provided. The plurality of combustion gas chamber rings 402 are arranged at equal intervals in the exhaust gas combustion housing 401, and the plurality of combustion gas chamber rings 402 are externally connected to a combustion gas delivery system. A plurality of ignition nozzles 403 are connected to the inner side of each combustion gas chamber ring 402. A plurality of deflectors 404 are provided. The plurality of deflectors 404 are alternately distributed up and down on the inner side of the exhaust gas combustion housing 401. The present invention is provided with an exhaust gas combustion chamber 4, which uses gas combustion treatment to completely burn the pyrolyzed and gasified exhaust gas. The surface coatings of waste aluminum cans often contain organic or inorganic compounds, and often both. Through thermal degradation and / or oxidation, these complex compounds will be reduced to the most basic forms. For example, polypropylene degrades into carbon monoxide, carbon dioxide, hydrogen, and water vapor. All products discharged from the paint stripping process, except water vapor, are harmful to the environment. Therefore, they must be burned before being discharged into the atmosphere. The temperature in the exhaust gas combustion chamber 4 is above 800 °C, which can completely burn toxic carcinogenic substances such as dioxins in the exhaust gas. Through high-temperature flames and sufficient residence time, the regeneration of harmful organic compounds can be avoided, and the exhaust gas can be effectively treated to meet the emission standards and reduce the emission of harmful gases into the environment. The heat energy recovery and circulation mechanism 5 includes a circulation fan 501, an exhaust gas delivery pipe 502, and a heat energy recovery delivery pipe 503. The input end of the circulation fan 501 is connected to the cyclone separator 6 through the exhaust gas delivery pipe 502. The output end of the circulation fan 501 is connected to the input end of the exhaust gas combustion housing 401 through the exhaust gas delivery pipe 502. The output end of the exhaust gas combustion housing 401 is connected to the inner cylinder 102 through the heat energy recovery delivery pipe 503. The present invention is provided with a heat energy recovery and circulation mechanism 5, which realizes the cyclic combustion of waste gas and the recovery and utilization of heat energy through a circulation fan 501, an exhaust gas delivery pipe 502 and a heat energy recovery delivery pipe 503, re-utilizes the energy released during the combustion and pyrolysis of gas, so that the total energy consumption of the paint stripping system is very low, greatly reducing the energy consumption of the paint stripping system, and at the same time improving the heat energy recovery utilization rate of the paint stripping system. According to on-site actual operation measurement, the unit energy consumption of this paint stripping system reaches 130 - 300 kwh / t. Compared with the existing paint stripping furnace, it saves 30 - 50% of fuel; A cyclone separator 6 is provided on the double-layer heat radiation paint stripping drum 1 and is connected to the heat energy recovery and circulation mechanism 5. The cyclone separator 6 is used for cyclone separation and cleaning of dust particles in the waste gas generated inside the double-layer heat radiation paint stripping drum 1. The cyclone separator 6 includes a cyclone separation housing 601, a dust hopper 602, an exhaust gas inlet port 603, a fixed bracket 604 and a rotating separation column 605; the cyclone separation housing 601 is arranged at the feeding end of the double-layer heat radiation paint stripping drum 1 through the exhaust gas inlet port 603, the dust hopper 602 is arranged at the bottom of the cyclone separation housing 601, the rotating separation column 605 is rotatably arranged inside the cyclone separation housing 601 at a position corresponding to the exhaust gas inlet port 603 through the fixed bracket 604, annularly distributed separation notches 606 are formed on the outer side of the rotating separation column 605, an arc-shaped guiding plate 607 is arranged inside the cyclone separation housing 601 at a position corresponding to the rotating separation column 605, and a slope ash discharge ring 608 is arranged at the lower part inside the cyclone separation housing 601; The present invention is provided with a cyclone separator 6, which separates and removes fine particles such as fine powder and dust in the waste gas, avoids the waste gas combustion and pyrolysis from circulating back into the double-layer heat radiation paint stripping drum 1 again, ensures that no dust and dirt are brought into the double-layer heat radiation paint stripping drum 1, and guarantees the normal operation of the paint stripping system.

[0020] The control method of the automatic paint stripping system based on recycled aluminum from aluminum cans provided by the present invention includes the following steps: A. Feeding of waste aluminum cans: The waste aluminum cans are conveyed into the feeding housing 201. At this time, both the first rotating seal plate 204 and the second rotating seal plate 206 are in contact and sealed with the first abutting plate 207. When the specified amount of waste aluminum cans is conveyed in the feeding housing 201, then the first telescopic cylinder 203 extends, drives the rotating shaft to rotate through the connecting rod, and further rotates the first rotating seal plate 204 to open, so that the waste aluminum cans fall between the first rotating seal plate 204 and the second rotating seal plate 206. Then, the first rotating seal plate 204 contracts to drive the first rotating seal plate 204 to rotate and close. Then, the second telescopic cylinder 205 extends, drives the rotating shaft to rotate through the connecting rod, rotates the second rotating seal plate 206 to open, and enables the waste aluminum cans to fall into the feeding end inside the double-layer heat radiation paint stripping drum 1 through the feeding hopper 202; B: Paint stripping treatment of waste aluminum cans: Next, the outer cylinder 101 is driven to rotate by a motor, and the waste aluminum cans are gradually spirally conveyed downward to the feeding end through the spiral feeding plate 104. During this process, the inner cylinder 102 recovers and utilizes the heat energy generated by the waste gas combustion chamber 4 through the heat energy recovery and circulation mechanism 5, so that the heat energy is first conveyed from the feeding end to the discharging end through the inner cylinder 102, and the heat energy is blown back between the outer cylinder 101 and the inner cylinder 102 through the arc-shaped back blowing seat 103. Then the heat energy moves from the discharging end to the feeding end, and through the heat radiation of the inner cylinder 102, the thermal decomposition of the oil and gas layer on the surface of the waste aluminum cans is completed; C: Waste gas and dust separation: During the thermal decomposition of the waste aluminum cans, waste gas is pyrolyzed. The waste gas is between the outer cylinder 101 and the inner cylinder 102. At this time, the circulation fan 501 sucks it into the cyclone separator 6 through the waste gas conveying pipe 502. The waste gas is blown onto the arc-shaped guiding plate 607 through the waste gas inlet port 603, so that the waste gas is guided to the rotating separation column 605. During the rotation of the rotating separation column 605 on the fixed bracket 604, the dust in the waste gas is separated and discharged through the ash hopper 602; D. Waste gas combustion treatment: Next, the circulation fan 501 sucks the waste gas separated from the dust by the cyclone separator 6 into the waste gas combustion chamber 4 through the waste gas conveying pipe 502, and then conveys the combustion gas to the combustion gas chamber ring 402 through the combustion gas conveying system, and ignites it through the ignition nozzle 403. At this time, the waste gas moves through the guide plate 404 in the waste gas combustion housing 401, and the waste gas is burned by the flame generated by the ignition nozzle 403, so that the waste gas is effectively burned and treated to meet the emission standards; E. Heat energy recovery and utilization: The heat energy generated by the combustion treatment of the waste gas in the waste gas combustion housing 401 is conveyed into the inner cylinder 102 through the heat energy recovery conveying pipe 503, so that the heat energy generated by the combustion of the waste gas is recycled; F. Discharging of the degreased waste aluminum cans: The waste aluminum cans after paint stripping between the outer cylinder 101 and the inner cylinder 102 spiral down and fall onto the third rotating seal plate 304 inside the blanking housing 301. Then, the third telescopic cylinder 303 extends, drives the rotating shaft to rotate through the connecting rod, and further rotates and opens the third rotating seal plate 304. The waste aluminum cans after paint stripping fall between the third rotating seal plate 304 and the fourth rotating seal plate 306. Then, the third telescopic cylinder 303 contracts to close the third rotating seal plate 304. Next, the fourth telescopic cylinder 305 extends, drives the rotating shaft to rotate through the connecting rod, rotates and opens the fourth rotating seal plate 306. The waste aluminum cans after paint stripping fall onto the fifth rotating seal plate 308 in the two blanking hoppers 302. Then, the fourth telescopic cylinder 305 contracts to close the fourth rotating seal plate 306. Next, the fifth telescopic cylinder 307 extends, drives the rotating shaft to rotate through the connecting rod, rotates and opens the fifth rotating seal plate 308. The waste aluminum cans after paint stripping are discharged from the blanking hopper 302. Then, the fifth telescopic cylinder 307 contracts and the fifth rotating seal plate 308 closes, completing the blanking operation of the paint-stripped waste aluminum cans.

[0021] The control method of the automatic paint stripping system based on recycled aluminum of aluminum cans provided by the present invention can automatically adjust the negative pressure inside the furnace, with no leakage of flue gas, protecting the production environment; automatically control the oxygen content in the control system, reducing the burning loss of aluminum cans, and automatically control the temperature, reducing the emissions of dioxins and nitrogen oxides.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic paint stripping system based on recycled aluminum from cans, characterized in that: include, A double-layer heat radiation paint stripping roller (1), the double-layer heat radiation paint stripping roller (1) being arranged on a system frame, the double-layer heat radiation paint stripping roller (1) being driven to rotate by a motor and continuously thermally decomposing the oil and gas layer on the surface of the waste cans in a heat radiation manner; A double bin feeding channel (2), the double bin feeding channel (2) being arranged at the feeding end of the double-layer heat radiation paint stripping roller (1), the double bin feeding channel (2) being used to achieve sealed feeding of waste cans; A double bin unloading channel (3), the double bin unloading channel (3) being arranged at the unloading end of the double-layer heat radiation paint stripping roller (1), the double bin unloading channel (3) being used to realize sealed unloading of waste cans after paint stripping; An exhaust gas combustion chamber (4), wherein the exhaust gas combustion chamber (4) and the double-layer heat radiation paint stripping roller (1) are connected via a heat energy recovery circulation mechanism (5), wherein the heat energy recovery circulation mechanism (5) is used to circulate the exhaust gas generated in the double-layer heat radiation paint stripping roller (1) into the exhaust gas combustion chamber (4), wherein the exhaust gas combustion chamber (4) is used to burn the exhaust gas and recover the heat energy generated in the exhaust gas combustion chamber (4) into the double-layer heat radiation paint stripping roller (1) via the heat energy recovery circulation mechanism (5); A cyclone separator (6), the cyclone separator (6) being arranged on the double-layer heat radiation paint stripping roller (1) and connected to the heat energy recovery circulation mechanism (5), the cyclone separator (6) being used for cyclone separation and cleaning of dust particles in the exhaust gas generated in the double-layer heat radiation paint stripping roller (1).

2. The automatic paint stripping system based on recycled aluminum from cans according to claim 1, characterized in that: The interior of the double-layer heat radiation paint stripping roller (1) is in a slightly negative pressure state, and the negative pressure inside the double-layer heat radiation paint stripping roller (1) is -5 mbar.

3. The automatic paint stripping system based on recycled aluminum from cans according to claim 2 is characterized in that: The double-layer heat radiation paint stripping roller (1) comprises an outer cylinder (101) and an inner cylinder (102); The outer cylinder (101) is rotatably arranged on the system frame by means of a roller, the outer cylinder (101) is rotatably connected to the loading end and the unloading end of the double-layer heat radiation paint stripping roller (1), the inner cylinder (102) is arranged at the inner center of the outer cylinder (101), and one end of the inner cylinder (102) extends out of the loading end of the double-layer heat radiation paint stripping roller (1) and is connected to the heat energy recovery circulation mechanism (5); An arc-shaped back-blowing seat (103) is provided in the outer cylinder (101) corresponding to the unloading end of the double-layer heat radiation paint stripping roller (1), and the other end of the inner cylinder (102) is aligned with the arc-shaped back-blowing seat (103), and the inner cylinder (102) and the arc-shaped back-blowing seat (103) are not in contact; The inner side wall of the outer cylinder (101) is provided with spiral material conveying plates (104) distributed at equal intervals.

4. The automatic paint stripping system based on recycled aluminum from cans according to claim 1, characterized in that: The double-bin feeding channel (2) comprises a feeding shell (201), a feeding hopper (202), a first telescopic cylinder (203), a first rotating sealing plate (204), a second telescopic cylinder (205) and a second rotating sealing plate (206); The loading shell (201) is arranged at the loading end of the double-layer heat radiation paint stripping roller (1), the loading hopper (202) is arranged at the bottom of the loading shell (201), the first rotating sealing plate (204) and the second rotating sealing plate (206) are respectively rotatably arranged at the upper and lower parts of the inner part of the loading shell (201) through a rotating shaft and a bearing, the first telescopic cylinder (203) and the second telescopic cylinder (205) are respectively arranged at the outer side of the loading shell (201) at positions corresponding to the first rotating sealing plate (204) and the second rotating sealing plate (206), and the output ends of the first telescopic cylinder (203) and the second telescopic cylinder (205) are respectively connected to the rotating shafts on the first rotating sealing plate (204) and the second rotating sealing plate (206) through connecting rods; An inclined first abutment plate (207) is provided at positions corresponding to the first rotating sealing plate (204) and the second rotating sealing plate (206) in the loading shell (201), and a double loading bin structure is formed between the first rotating sealing plate (204), the second rotating sealing plate (206) and the first abutment plate (207).

5. The automatic paint stripping system based on recycled aluminum from cans according to claim 1, characterized in that: The double-bin unloading channel (3) comprises an unloading shell (301), a unloading hopper (302), a third telescopic cylinder (303), a third rotary sealing plate (304), a fourth telescopic cylinder (305), a fourth rotary sealing plate (306), a fifth telescopic cylinder (307) and a fifth rotary sealing plate (308); The unloading shell (301) is arranged at the unloading end of the double-layer heat radiation paint stripping roller (1); two unloading hoppers (302) are provided, and the two unloading hoppers (302) are symmetrically arranged at the bottom of the unloading shell (301); the third rotating sealing plate (304) and the fourth rotating sealing plate (306) are rotatably arranged at the upper and lower parts of the unloading shell (301) through a rotating shaft and a bearing, respectively; the third telescopic cylinder (303) and the fourth telescopic cylinder (305) are respectively arranged on the outside of the unloading shell (301) corresponding to the third rotating sealing plate (304) and The fourth rotary sealing plate (306) is located at the position of the third telescopic cylinder (303) and the fourth telescopic cylinder (305), and the output ends of the third telescopic cylinder (303) and the fourth telescopic cylinder (305) are respectively connected to the rotating shafts on the third rotary sealing plate (304) and the fourth rotary sealing plate (306) through connecting rods, and a second abutment plate (309) is provided at the positions corresponding to the third rotary sealing plate (304) and the fourth rotary sealing plate (306) in the material unloading shell (301), and a double-bin structure for unloading is formed between the third rotary sealing plate (304), the fourth rotary sealing plate (306) and the second abutment plate (309); The fifth rotating sealing plate (308) is arranged in the lower hopper (302) via a rotating shaft and a bearing, the fifth telescopic cylinder (307) is arranged on the outer side of the lower hopper (302) at a position corresponding to the fifth rotating sealing plate (308), and the output end of the fifth telescopic cylinder (307) is connected to the rotating shaft on the fifth rotating sealing plate (308) via a connecting rod.

6. The automatic paint stripping system based on recycled aluminum from cans according to claim 3, characterized in that: The exhaust gas combustion chamber (4) comprises an exhaust gas combustion shell (401), a combustion gas cavity ring (402), an ignition nozzle (403) and a guide plate (404); The exhaust gas combustion shell (401) is connected to the heat energy recovery circulation mechanism (5), a plurality of the combustion gas cavity rings (402) are provided, the plurality of the combustion gas cavity rings (402) are arranged at equal intervals in the exhaust gas combustion shell (401), and the plurality of the combustion gas cavity rings (402) are externally connected to a combustion gas delivery system, and the inner side of each of the combustion gas cavity rings (402) is connected to a plurality of the ignition nozzles (403); A plurality of guide plates (404) are provided, and the guide plates (404) are alternately distributed up and down on the inner side of the exhaust gas combustion shell (401).

7. The automatic paint stripping system based on recycled aluminum from cans according to claim 6, characterized in that: The heat energy recovery circulation mechanism (5) comprises a circulation fan (501), an exhaust gas delivery pipe (502) and a heat energy recovery delivery pipe (503); The input end of the circulating fan (501) is connected to the cyclone separator (6) via the exhaust gas delivery pipe (502), the output end of the circulating fan (501) is connected to the input end of the exhaust gas combustion shell (401) via the exhaust gas delivery pipe (502), and the output end of the exhaust gas combustion shell (401) is connected to the inner cylinder (102) via the heat energy recovery delivery pipe (503).

8. The automatic paint stripping system based on recycled aluminum from cans according to claim 1, characterized in that: The cyclone separator (6) comprises a cyclone separation housing (601), an ash hopper (602), an exhaust gas inlet port (603), a fixed bracket (604) and a rotating separation column (605); The cyclone separation shell (601) is arranged at the feeding end of the double-layer heat radiation paint stripping roller (1) through the exhaust gas inlet port (603), the ash hopper (602) is arranged at the bottom of the cyclone separation shell (601), the rotating separation column (605) is rotatably arranged at a position corresponding to the exhaust gas inlet port (603) in the cyclone separation shell (601) through the fixed bracket (604), and the outer side of the rotating separation column (605) is provided with separation notches (606) distributed in a ring shape.

9. The automatic paint stripping system based on recycled aluminum from cans according to claim 8, characterized in that: An arc-shaped guide plate (607) is provided at a position corresponding to the rotating separation column (605) in the cyclone separation housing (601), and a sloped lower ash ring (608) is provided at the lower part of the interior of the cyclone separation housing (601).

10. A control method for an automatic paint stripping system based on recycled aluminum from cans according to any one of claims 1 to 9, characterized in that: The steps include: A. Loading of waste cans: The waste cans are transported into the feeding shell (201), and at this time, the first rotating sealing plate (204) and the second rotating sealing plate (206) are both in abutment with the first abutting plate (207) for sealing. When the waste cans have completed the specified amount of transportation in the feeding shell (201), the first telescopic cylinder (203) is extended, and the rotating shaft is driven to rotate through the connecting rod, so that the first rotating sealing plate (204) is rotated and opened, so that the waste cans fall between the first rotating sealing plate (204) and the second rotating sealing plate (206), and then the first rotating sealing plate (204) is driven to rotate and close by contracting the first rotating sealing plate (204), and then the second telescopic cylinder (205) is extended, and the rotating shaft is driven to rotate through the connecting rod, so that the second rotating sealing plate (206) is rotated and opened, so that the waste cans pass through the feeding hopper (202) and fall to the feeding end in the double-layer heat radiation paint stripping roller (1); B: Paint removal of waste cans: Then, the outer cylinder (101) is driven to rotate by a motor, and the waste cans are gradually spirally conveyed to the lower feeding end through the spiral conveying plate (104). During this process, the inner cylinder (102) recycles the heat energy generated by the waste gas combustion chamber (4) through the heat energy recovery circulation mechanism (5), so that the heat energy is first conveyed from the feeding end to the unloading end through the inner cylinder (102), and the heat energy is back-blown from between the outer cylinder (101) and the inner cylinder (102) through the arc-shaped back-blowing seat (103). The heat energy then moves from the unloading end to the upper feeding end, and the oil and gas layer on the surface of the waste cans is thermally decomposed through the heat radiation of the inner cylinder (102); C: Exhaust gas and dust separation: During the thermal decomposition process of the waste cans, waste gas is generated by thermal decomposition. The waste gas is between the outer cylinder (101) and the inner cylinder (102). At this time, the circulating fan (501) sucks the waste gas into the cyclone separator (6) through the waste gas conveying pipe (502). The waste gas is blown onto the arc-shaped guide plate (607) through the waste gas inlet port (603), so that the waste gas is guided to the rotating separation column (605). The rotating separation column (605) separates the dust in the waste gas during the rotation of the fixed bracket (604) and discharges the dust through the ash hopper (602). D. Waste gas combustion treatment: Then, the circulating fan (501) sucks the waste gas separated from the dust by the cyclone separator (6) into the waste gas combustion chamber (4) through the waste gas conveying pipe (502), and then conveys the combustion gas to the combustion gas cavity ring (402) through the combustion gas conveying system, and ignites through the ignition nozzle (403). At this time, the waste gas is guided and moved through the guide plate (404) in the waste gas combustion shell (401), and the waste gas is burned by the flame generated by the ignition nozzle (403), so that the waste gas is effectively burned and treated to meet the emission standards; E. Heat recovery and utilization: The heat energy generated by the exhaust gas combustion treatment in the exhaust gas combustion shell (401) is transported to the inner cylinder (102) through the heat energy recovery and transportation pipe (503), so that the heat energy generated by the exhaust gas combustion is recycled; F. Unloading of paint-removed waste cans: The waste cans after the paint is removed are spirally conveyed and fall onto the third rotating sealing plate (304) in the unloading shell (301), and then the third telescopic cylinder (303) is extended, and the rotating shaft is driven to rotate through the connecting rod, so that the third rotating sealing plate (304) is rotated and opened, and the waste cans after the paint is removed fall between the third rotating sealing plate (304) and the fourth rotating sealing plate (306), and then the third telescopic cylinder (303) is contracted to close the third rotating sealing plate (304), and then the fourth telescopic cylinder (305) is extended, and the rotating shaft is driven to rotate through the connecting rod. The driving shaft rotates, causing the fourth rotating sealing plate (306) to rotate and open, and the waste cans after the paint stripping fall onto the fifth rotating sealing plate (308) in the two lower hoppers (302). Then, the fourth telescopic cylinder (305) contracts, causing the fourth rotating sealing plate (306) to close. Then, the fifth telescopic cylinder (307) extends, driving the rotating shaft to rotate through the connecting rod, causing the fifth rotating sealing plate (308) to rotate and open, and the waste cans after the paint stripping are discharged from the lower hopper (302). Then, the fifth telescopic cylinder (307) contracts, and the fifth rotating sealing plate (308) closes, completing the unloading operation of the waste cans after the paint stripping is completed.

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