Can drying and paint stripping device

Abstract

The present invention discloses a can drying and depainting device, comprising a hopper, a chain plate conveyor, a belt conveyor, a screw conveyor, a combustion chamber, a dust removal chamber, a secondary combustion system, a drying drum and a discharge box; after the waste cans are loaded by the hopper, they fall to the chain plate conveyor, are transported to the belt conveyor by the chain plate conveyor, are transmitted to the screw conveyor by the belt conveyor, are transported to the drying drum by the screw conveyor, and are transported to the drying drum by the screw conveyor. The front end of the drying drum is provided with the combustion chamber, and the waste cans fall directly into the drying drum under the influence of gravity, and other impurities are burned in the combustion chamber; the waste cans enter the drying drum for drying and depainting, and then enter the discharge box for unloading. The can drying and depainting device of the present invention can reduce the smelting time and improve the recovery rate, achieve the purpose of energy saving, environmental protection and safe production, and has the advantages of short smelting time, high recovery rate, energy saving and environmental protection.

Description

Technical Field

[0001] The invention relates to the field of aluminum recycling, and in particular to a can drying and paint stripping device with short smelting time, high recycling rate, energy saving and environmental protection. Background Art

[0002] Cans are a commonly used packaging container that brings convenience to our lives. They are often used by people to hold beer and beverages. The main component of cans is aluminum, and the outer surface is painted, mostly benzene and alcohol chemicals. A solid film with a certain strength and continuity is formed on the surface of the can, which is not easy to clean. For the surface paint part, if it cannot be removed, it will directly affect the composition of aluminum water if it is directly smelted. In the later recycling process, after processing, extrusion and flattening (for easy transportation), there is still a trace of water in the can that cannot be discharged. If it is directly smelted, when the water in the can comes into direct contact with the high-temperature aluminum liquid, aluminum water will explode or splash, and the consequences are very serious.

[0003] Therefore, it is necessary to propose an improvement to overcome the defects of the prior art. Summary of the invention

[0004] The purpose of the invention is to solve the problems in the prior art and to provide a can drying and paint stripping device which has short melting time, high recovery rate, energy saving and environmental protection.

[0005] The technical solution of the present invention is:

[0006] The can drying and paint stripping device comprises a loading hopper, a chain plate conveyor, a belt conveyor, a screw conveyor, a combustion chamber, a dust removal chamber, a secondary combustion system, a drying drum and a discharge box; after the waste cans are loaded by the loading hopper, they fall onto the chain plate conveyor, are transported to the belt conveyor via the chain plate conveyor, are transported to the screw conveyor via the belt conveyor, and are transported to the drying drum via the screw conveyor. The combustion chamber is arranged at the front end of the drying drum. The waste cans fall directly into the drying drum under the influence of gravity, and other impurities Combustion occurs in the combustion chamber, which is connected to the dust removal chamber. Impurity smoke after combustion enters the dust removal chamber, and heavy impurities fall into the garbage bin through the dust removal chamber. The dust removal chamber is connected to the secondary combustion system. Waste cans enter the drying drum for drying and paint removal, and then enter the discharge box for unloading. The belt conveyor and the screw conveyor, the drying drum and the discharge box all unload materials through the guide hopper. The drying drum, the combustion chamber, and the discharge box are all sealed and connected. The drying drum and the combustion chamber are provided with a sealing device.

[0007] As a preferred technical solution, the upper hopper includes a column, a hopper, a conical silo and a discharge port; an anti-blocking device is provided in the middle of the conical silo, and the anti-blocking device includes a rotating shaft, rotating blades, a transmission chain, a bearing seat and a reduction motor.

[0008] As a preferred technical solution, the chain conveyor includes a motor reducer, a transmission chain, a transmission shaft, a transmission sprocket, a chain plate and a bracket; the motor reducer is used to adjust the speed of the chain conveyor.

[0009] As a preferred technical solution, the belt conveyor includes a skirt belt conveyor and a corner belt conveyor, and the corner belt conveyor is arranged near the screw conveyor; the skirt belt conveyor includes a skirt belt conveyor frame bracket, a skirt belt, a motor gearbox, a drive roller, a passive roller, an upper belt roller group, a lower belt roller group, a belt rib and a belt stop wheel; the discharge end of the corner belt conveyor is connected to the screw conveyor through the guide hopper, and the waste cans enter the screw conveyor through the guide hopper.

[0010] As a preferred technical solution, the combustion chamber includes a shell, a lining, a combustion system and an inspection hole; the shell is welded from steel plates; the lining includes lining anchors, fiber cotton and castables; the combustion system consists of two sets, including two sets of burners symmetrically arranged.

[0011] As a preferred technical solution, the dust removal chamber includes a dust removal chamber frame bracket, an ash removal chamber, an explosion-proof hole, a conical waste bin, a single-layer flap-type ash discharge valve and a dust hood; a high-temperature fan is arranged at the outlet end of the dust removal chamber, and the dust removal chamber is under a slight negative pressure. After the impurities are burned in the combustion chamber, light objects are sucked into the dust-free chamber. The dust hood is arranged above the dust-free chamber, and is sucked into the furnace under the action of the high-temperature fan; heavy objects fall into the conical waste bin, and fall into the garbage hopper through the single-layer flap-type ash discharge valve; the explosion-proof port is arranged on the outside of the dust removal chamber.

[0012] As a preferred technical solution, the sealing device includes a ceramic fiber block, a sealing anchor, a fixing steel plate, a packing, a spring and a bolt.

[0013] As a preferred technical solution, the secondary combustion system includes a circulating flue and a gate valve, and the high-temperature fan draws the flue gas into the circulating flue and into the furnace for secondary high-temperature combustion.

[0014] As a preferred technical solution, the drying drum includes a drum steel structure, a drum body, a supporting wheel device, a base, a guide wheel, a passive gear, a transmission mechanism and a wheel belt; the drying drum is provided with a heat source by a smelting furnace; a material guide plate is arranged in the drum body, and the material guide plate includes a first flat material guide plate, a bucket material guide piece and a second flat material guide plate, the first flat material guide plate and the second flat material guide plate are respectively arranged at the material inlet end and the material outlet end of the drum body, and are evenly distributed in the drum body, the bucket material guide piece is arranged in the middle part of the drum body, and the bucket material guide piece is evenly distributed in the drum body.

[0015] As a preferred technical solution, the feed box includes a feed box frame support, an upper box body, a conical silo and an auger conveyor.

[0016] The can drying and paint stripping device of the present invention uses the waste heat brought by the furnace flue gas to dry and preheat the cans, so that the cans reach a certain temperature, dry the trace moisture inside the can body and remove the paint on the surface of the can body. At the same time, the combustion chamber is used to burn and remove impurities brought by the cans when they are recycled, so as to improve the purity of the recycled aluminum water. The can drying and paint stripping device of the present invention can reduce the smelting time and improve the recovery rate, achieve the purpose of energy saving, environmental protection and safe production, and has the advantages of short smelting time, high recovery rate, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of the can drying and paint stripping device. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0020] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0021] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0022] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0023] like Figure 1 The figure shows a specific embodiment of a can drying and paint stripping device of the present invention. Figure 1 As shown, the can drying and depainting device of this embodiment includes a hopper 1, a chain plate conveyor 2, a belt conveyor, a screw conveyor 4, a combustion chamber 5, a dust removal chamber 6, a secondary combustion system 7, a drying drum 8 and a discharge box 9. After the waste cans are loaded by the hopper 1, they fall to the chain plate conveyor 2, are transported to the belt conveyor through the chain plate conveyor 2, are transmitted to the screw conveyor 4 through the belt conveyor, and are transported to the drying drum 8 through the screw conveyor 4. The front end of the drying drum 8 is provided with a combustion chamber 5. The waste cans fall directly into the drying drum 8 under the influence of gravity, and other impurities are burned in the combustion chamber 5. The combustion chamber 5 is connected with the dust removal chamber 6. The impurity smoke after combustion enters the dust removal chamber 6, and the heavy impurities fall into the garbage hopper through the dust removal chamber 6; the dust removal chamber 6 is connected with the secondary combustion system 7; the waste cans enter the drying drum 8 for drying and depainting, and then enter the discharge box 9 for unloading. Among them, the belt conveyor and the screw conveyor 4, the drying drum 8 and the discharge box 9 are all unloaded through the guide hoppers arranged at different positions; the drying drum 8 and the combustion chamber 5, the drying drum 8 and the discharge box 9 are all sealed and connected; the drying drum 8 and the combustion chamber 5 are provided with a sealing device 8a.

[0024] In this embodiment, the upper hopper 1 includes a column, a hopper, a conical silo and a discharge port. The column material of the upper hopper 1 is H-shaped steel, and the rest is made of steel plate. The stacker shovels the waste cans into the upper hopper 1 with a bucket, and the loading height is about 2.5 meters to facilitate the stacker to feed. The silo of the upper hopper 1 is a conical silo, and an anti-blocking device is provided in the middle of the conical silo to prevent the cans from being too heavy and too thick and getting stuck. The anti-blocking device includes a rotating shaft, a rotating blade, a transmission chain, a bearing seat and a reduction motor. Turn on the reduction motor button of the anti-blocking device, the reduction motor drives the transmission chain to rotate, and the transmission chain drives the rotating shaft and the rotating blades to rotate, and rotates together with the waste cans, which plays a role in stirring and balancing, and is convenient for discharging from the discharge port. The staff began to add materials into the hopper with a forklift, pouring the waste cans evenly into the silo. Under the continuous stirring of the anti-blocking device, the waste cans fell evenly from the discharge port onto the chain conveyor, achieving the purpose of balanced feeding.

[0025] In this embodiment, the chain plate conveyor 2 includes a motor reducer, a transmission chain, a transmission shaft, a transmission sprocket, a chain plate and a bracket. Start the power supply of the chain plate conveyor 2, the gearbox of the motor reducer and the transmission sprocket rotate in the same direction, and the whole set of chain plate conveyor 2 is in operation. After the waste cans fall from the discharge port of the upper hopper 1, they are evenly transported forward to the chain plate of the chain plate conveyor 2. The waste cans slowly move forward with the chain plate, evenly discharge, and slowly transfer to the feeding port of the belt conveyor. The motor reducer can also be used to adjust the transportation speed of the chain plate conveyor 2, and the conveying surface of the chain plate conveyor 2 is flat and smooth, with low friction, and the transition of raw materials between the conveying lines is smooth, so as to achieve the purpose of uniform transmission.

[0026] In this embodiment, the belt conveyor includes a skirt belt conveyor 31 and a corner belt conveyor 32, and the corner belt conveyor 32 is arranged near the screw conveyor 4. The skirt belt conveyor 31 includes a skirt belt conveyor frame bracket, a skirt belt, a motor gearbox, a drive roller, a passive roller, an upper belt roller group, a lower belt roller group, a belt retaining edge and a belt retaining wheel. The skirt belt conveyor 31 is a conveyor belt with a skirt and a partition. The function of the partition is to prevent the material from sliding down or being scattered. The conveyor belt can continuously convey the waste cans at any inclination angle of 0-90 degrees, and has the characteristics of large conveying inclination angle and large conveying capacity. The drive roller of the skirt belt conveyor 31 is driven by a motor reducer, and the conveyor belt is dragged by the friction between the drive roller and the conveyor belt, and the conveyor bag is unloaded at the discharge end by the friction of the conveyor belt. The waste cans arrive at the feeding end of the skirt belt conveyor, go uphill, and are slowly conveyed to the discharging end, and naturally fall to the feeding end of the corner belt conveyor 32 through the guide trough, and are then transferred to the discharging end of the corner belt conveyor 32 through the feeding end of the corner belt conveyor 32. The discharging end of the corner belt conveyor 32 is connected to the screw conveyor 4 through the guide hopper 33, and the cans directly enter the screw conveyor 4 through the guide hopper 33.

[0027] In the present invention, the screw conveyor 4 is a machine that uses a motor to drive the screw to rotate and push the material to achieve the purpose of conveying. It can convey horizontally, obliquely or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing, convenient operation, easy maintenance, and convenient closed transportation. When using the screw conveyor, the rotating blades inside rotate together with the can raw materials to achieve the purpose of sealing and isolating air from entering.

[0028] In this embodiment, the combustion chamber 5 includes a shell, an inner lining, a combustion system and an inspection hole. The shell of the combustion chamber 5 is formed by welding steel plates, and a combustion system is arranged inside, which needs to be resistant to high temperatures. The inner lining includes anchors, fiber cotton and castables. The combustion chamber 5 has two sets of combustion systems. When the waste cans are recycled, there are still plastic garbage, dust, particles and other objects adhered to the can body of the waste cans, which are not completely removed. If they cannot be cleaned up, the product composition will be affected. When the waste cans are transported to the feed port of the drying drum 8, a lot of plastic garbage, dust and particles will pop out and diffuse with the waste cans. The drying drum 8 has a certain temperature inside. When the temperature rises, the surface paint of the waste cans will be decomposed and carbonized. Some harmful smoke will also be produced during the decomposition process. Therefore, a combustion chamber 5 is set at the front end of the drying drum 8, and two sets of burners are arranged inside, one on each side. Due to their own weight, the waste cans fall directly to the feeding port of the drying drum 8, and the plastic waste, dust, particulate matter and harmful smoke that follow the cans will diffuse into the combustion chamber and be burned.

[0029] In this embodiment, the dust removal chamber 6 includes a dust removal chamber frame support, a dust removal chamber, an explosion-proof hole, a conical waste bin, a single-layer flap-type ash discharge valve and a dust hood. A high-temperature fan is provided at the outlet end of the dust removal chamber 6, and the entire space is slightly negative pressure. After the plastic waste, dust, particulate matter, and harmful smoke are burned in the combustion chamber 5, the light objects are sucked into the dust removal chamber 6 under the influence of the negative pressure. A dust collection hood is provided above the dust removal chamber 6. Under the action of the high-temperature fan, the light objects are sucked into the furnace. The materials that are not burned cleanly are secondary burned, and the excess heat energy is also brought to the furnace, which saves gas and achieves the purpose of environmental protection. After the combustion in the combustion chamber 5, the heavy objects fall directly downward to the conical waste bin 61, and fall into the garbage bin after passing through the single-layer flap-type ash discharge valve 62. There are two sets of single-layer flap-type ash discharge valves 62. To prevent air from entering, cylinder control is adopted. The two sets of single-layer flap-type ash discharge valves 62 can only be opened one by one when unloading, and cannot be opened at the same time. An explosion-proof opening is provided on the outside of the dust removal chamber 6. When waste cans are stripped of paint at high temperatures, a small amount of moisture inside some cans may explode when exposed to high temperatures. In order to avoid explosions, explosion-proof holes are provided.

[0030] In the can drying and paint stripping device of the present invention, the body of the drying drum 8, the combustion chamber 5 and the feed box 9 need to be sealed and connected to prevent air from entering. The drying drum 8 is always in a rotating state when working, the body of the combustion chamber 5 is in a stationary state, and the combustion chamber 5 and the feed port of the drying drum 8 are sealed by a sealing device 8a. The sealing device 8a includes a ceramic fiber block, an anchor, a fixing steel plate, a packing, a spring and a bolt.

[0031] In this embodiment, the secondary combustion system 7 includes a circulating flue and a gate valve. The high-temperature fan draws the flue gas into the circulating flue and into the furnace for secondary high-temperature combustion, thereby removing harmful substances and achieving the purpose of environmental protection and energy saving.

[0032] In this embodiment, the drying drum 8 includes a drum steel structure, a drum body, a supporting wheel device, a base, a guide wheel, a passive gear, a transmission mechanism and a belt. The drum steel structure is used to support the drum body, and the main material is made of H300 steel welded together. The drying drum 8 is provided with a heat source by a smelting furnace; the aluminum material is provided by a conveyor, and the preheating time of the aluminum material in the drum is controlled by the guide plate in the drum and the drum speed to ensure that the aluminum material is fully preheated. Rock wool is used to wrap the connecting flange to achieve the purpose of heat preservation. The guide plate arrangement in the entire drum is divided into three parts, including a first flat guide plate, a bucket guide member and a second flat guide plate. At the material inlet end, it is divided into the first flat-plate material guide plate, which is evenly distributed around the drum; the middle part is a bucket-type material guide piece, which is evenly distributed around the drum and is regularly distributed in rows horizontally; at the material outlet end, a part is a second flat-plate material guide plate, which is evenly distributed around the drum and is connected by welding inside the drum. This solves the problems of insufficient stirring and breaking of materials, accumulation of materials, and uneven conveying volume when conveying in the drum.

[0033] In this embodiment, the material box 9 includes a material box frame support, an upper box body, a conical silo and an auger conveyor. The function of the material box 9 is to guide the aluminum material and protect the heat source. The raw materials dried by the drying drum 8 are guided out by the guide plate and fall into the material box 9, and are introduced into the auger conveyor through the material guide trough of the material box 9, and then into the auger conveyor and the auger conveyor to feed the vortex well of the furnace. The auger conveyor is added to prevent air from entering the drying preheating drum.

[0034] The can drying and paint stripping device of the present invention uses the waste heat brought by the furnace flue gas to dry and preheat the cans, so that the cans reach a certain temperature, dry the trace moisture inside the can body and remove the paint on the surface of the can body. At the same time, the combustion chamber is used to burn and remove impurities brought by the cans when they are recycled, so as to improve the purity of the recycled aluminum water. The can drying and paint stripping device of the present invention can reduce the smelting time and improve the recovery rate, achieve the purpose of energy saving, environmental protection and safe production, and has the advantages of short smelting time, high recovery rate, energy saving and environmental protection.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. Can drying and paint stripping device, characterized by: It includes an upper hopper, a chain conveyor, a belt conveyor, a screw conveyor, a combustion chamber, a dust removal chamber, a secondary combustion system, a drying drum and a discharge box; after the waste cans are loaded by the upper hopper, they fall onto the chain conveyor, are transported to the belt conveyor via the chain conveyor, are transmitted to the screw conveyor via the belt conveyor, and are transported to the drying drum via the screw conveyor. The front end of the drying drum is provided with the combustion chamber, and the waste cans fall directly into the drying drum under the influence of gravity, and the plastic garbage, dust and particles accompanying the cans are Harmful smoke from waste materials burns in the combustion chamber, the combustion chamber is connected with the dust removal chamber, the impurity smoke after combustion enters the dust removal chamber, and heavy impurities fall into the garbage bin through the dust removal chamber; the dust removal chamber is connected with the secondary combustion system; the waste cans enter the drying drum for drying and paint removal, and then enter the discharge box for unloading; the belt conveyor and the screw conveyor, the drying drum and the discharge box all unload materials through the guide hopper; the drying drum, the combustion chamber and the discharge box are all sealed and connected; the drying drum and the combustion chamber are provided with a sealing device; The dust removal chamber includes a dust removal chamber frame support, an ash removal chamber, an explosion-proof hole, a conical waste bin, a single-layer flap-type ash discharge valve and a dust hood; a high-temperature fan is arranged at the outlet end of the dust removal chamber, and the dust removal chamber is slightly negative pressure. After the impurities are burned in the combustion chamber, light objects are sucked into the dust removal chamber. The dust collection hood is arranged above the dust removal chamber, and is sucked into the furnace under the action of the high-temperature fan; heavy objects fall into the conical waste bin, and fall into the garbage hopper through the single-layer flap-type ash discharge valve; the explosion-proof hole is arranged on the outside of the dust removal chamber; The secondary combustion system includes a circulating flue and a gate valve, and the high-temperature fan sucks the flue gas into the circulating flue and into the furnace for secondary high-temperature combustion; The drying drum uses the waste heat brought by the furnace flue gas to dry and preheat the raw materials. The raw materials dried by the drying drum are discharged through the guide plate and then fall into the discharge box. They are introduced into the auger conveyor through the guide trough of the discharge box, and then into the auger conveyor and then into the vortex well of the furnace for feeding. The auger conveyor is added to prevent air from entering the drying drum.

2. The can drying and paint stripping device according to claim 1, characterized in that: The upper hopper includes a column, a hopper, a conical silo and a discharge port; an anti-blocking device is provided in the middle of the conical silo, and the anti-blocking device includes a rotating shaft, rotating blades, a transmission chain, a bearing seat and a reduction motor.

3. The can drying and paint stripping device according to claim 1, characterized in that: The chain conveyor comprises a motor reducer, a transmission chain, a transmission shaft, a transmission sprocket, a chain plate and a bracket; the motor reducer is used to adjust the speed of the chain conveyor.

4. The can drying and paint stripping device according to claim 1, characterized in that: The belt conveyor includes a skirt belt conveyor and a corner belt conveyor, and the corner belt conveyor is arranged near the screw conveyor; the skirt belt conveyor includes a skirt belt conveyor frame bracket, a skirt belt, a motor gearbox, a drive roller, a passive roller, an upper belt roller group, a lower belt roller group, a belt rib and a belt stop wheel; the discharge end of the corner belt conveyor is connected to the screw conveyor through the guide hopper, and the waste cans enter the screw conveyor through the guide hopper.

5. The can drying and paint stripping device according to claim 1, characterized in that: The combustion chamber comprises a shell, a liner, a combustion system and an inspection hole; the shell is formed by welding steel plates; the liner comprises liner anchors, fiber cotton and casting material; the combustion system consists of two sets, including two sets of burners arranged symmetrically.

6. The can drying and paint stripping device according to claim 1, characterized in that: The sealing device comprises a ceramic fiber block, a sealing anchor, a fixing steel plate, a packing, a spring and a bolt.

7. The can drying and paint stripping device according to claim 1, characterized in that: The drying drum includes a drum steel structure, a drum body, a supporting wheel device, a base, a guide wheel, a passive gear, a transmission mechanism and a wheel belt; the drying drum is provided with a heat source by a smelting furnace; a material guide plate is arranged in the drum body, and the material guide plate includes a first flat material guide plate, a bucket material guide piece and a second flat material guide plate, the first flat material guide plate and the second flat material guide plate are respectively arranged at the material inlet end and the material outlet end of the drum body, and are evenly distributed in the drum body, the bucket material guide piece is arranged in the middle part of the drum body, and the bucket material guide pieces are evenly distributed in the drum body.

8. The can drying and paint stripping device according to claim 1, characterized in that: The unloading box comprises a unloading box frame support, an upper box body, a conical silo and an auger conveyor.

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