Plastic waste removal and recycling equipment and methods

Abstract

This invention relates to a plastic waste removal and recycling device and method. The plastic waste removal and recycling device includes a storage tank, a dust removal assembly, and a metal removal assembly. The storage tank includes a tank body, a feed pipe, an exhaust pipe, and a discharge pipe. The dust removal assembly includes a first vent, a first nozzle, a second vent, a second nozzle, a third vent, and a third nozzle. The first, second, and third vents are arranged axially along the tank body. The first nozzle is inclined upwards and connected to the first vent; the second nozzle is inclined upwards and connected to the second vent; and the third nozzle is inclined upwards and connected to the third vent. The metal removal assembly includes a first demagnetizer and a second demagnetizer. The first demagnetizer is disposed between the first vent and the feed pipe, and the second demagnetizer is disposed between the second vent and the first vent. In this device, air is blown onto the plastic waste through the first, second, and third nozzles. Dust is discharged through the exhaust pipe, and metal scraps are adsorbed onto the first and second demagnetizers.

Description

Technical Field

[0001] This invention relates to the field of plastic waste recycling technology, and in particular to a plastic waste impurity removal and recycling device and a plastic waste impurity removal and recycling method. Background Technology

[0002] Plastic waste comes from a wide range of sources, contains a high amount of impurities, and has a complex composition. In addition to the plastic itself, it also contains ash and a small amount of metal impurities, which brings certain difficulties to recycling and processing. If the impurities and various plastics cannot be separated, it will affect its subsequent treatment and resource utilization.

[0003] For example, the invention patent with announcement number CN113752420B discloses a plastic waste recycling and processing device, including a primary crusher, a magnetic separation device, a secondary crusher, a washing and separation device, and a conveying and dust removal device. The soft waste picking device is set above the conveying belt between the magnetic separation device and the discharge end of the primary crusher. It includes a picking bracket, picking teeth I, a conveying roller, and an arc plate. A row of arc-shaped picking teeth I is set on the material input side of the conveying roller, and an arc plate is set on the other side. The two ends of the conveying roller are connected to the picking bracket placed on the frame through roller shafts. Multiple rows of conveying teeth are set along the circumference of the conveying roller. The picking teeth I and the conveying teeth are spaced apart along the axial direction. The end of the conveying teeth on the conveying roller has a bend on the side that contacts the material. The picking surface of the picking teeth I is an arc surface. The end of the arc plate near the conveying roller has multiple opening slots through which the conveying teeth I pass. The other side of the arc plate is a concave arc groove with material collection. A soft waste collection box placed outside the shell is connected to the discharge end of the concave arc groove. However, waste materials can easily interfere with the feeding teeth and the arc plate, thus affecting the rotation of the feeding roller, making it prone to damage and resulting in a complex overall structure. Summary of the Invention

[0004] Therefore, it is necessary to provide a plastic waste removal and recycling device and a plastic waste removal and recycling method to address the above problems.

[0005] A plastic waste removal and recycling device includes a storage tank, a dust removal assembly, and a metal removal assembly. The storage tank includes a tank body, an inlet pipe, an exhaust pipe, and a discharge pipe. The inlet pipe and the exhaust pipe are both connected to the top of the tank body, and the discharge pipe is connected to the bottom of the tank body. The dust removal assembly includes a first venting element, a first nozzle, a second venting element, a second nozzle, a third venting element, and a third nozzle. The first, second, and third venting elements are arranged along the axial direction of the tank body. There are multiple first, second, and third nozzles. The first venting element is located below the inlet pipe. The first nozzle is inclined upward and connected to the first venting component; each of the second nozzles is inclined upward and connected to the second venting component, and the second nozzles are arranged circumferentially along the second venting component; each of the third nozzles is inclined upward and connected to the third venting component, and the third nozzles are arranged circumferentially along the third venting component; the metal removal assembly includes a first demagnetizer and a second demagnetizer, both of which are installed on the inner wall of the tank body. The first demagnetizer is disposed between the first venting component and the feed pipe, and the second demagnetizer is disposed between the second venting component and the first venting component.

[0006] In one embodiment, the first vent is conical; the second and third vents are both arranged along the periphery of the tank.

[0007] In one embodiment, the second nozzle and the third nozzle are arranged alternately.

[0008] In one embodiment, both the second vent and the third vent are cylindrical, and the diameter of the third vent is larger than the diameter of the second vent.

[0009] In one embodiment, the dust removal assembly further includes a fixing frame, which includes a first support portion, a second support portion, and a third support portion. One end of the second support portion is connected to the first support portion, and the other end is connected to the third support portion. There are multiple second support portions, and each second support portion is arranged along the periphery of the first support portion. The first venting element is installed on the first support portion, and the third support portion is installed on the tank body.

[0010] In one embodiment, the dust removal assembly further includes a first support leg, a second support leg, and a third support leg. The first support leg, the second support leg, and the third support leg are all installed on the inner wall of the tank. The third support portion is installed on the first support leg, the second venting component is installed on the second support leg, and the third venting component is installed on the third support leg.

[0011] In one embodiment, the metal removal assembly further includes a fourth demagnetizer and a fifth demagnetizer, which are respectively connected to the two sides of the tank body. The fourth demagnetizer is located below the third vent, and the fifth demagnetizer is located below the fourth demagnetizer. Both the fourth and fifth demagnetizers are inclined downwards. One end of the fourth demagnetizer is installed on one side of the tank body, and a first discharge hole is provided between the other end and the other side of the tank body. One end of the fifth demagnetizer is installed on one side of the tank body, and a second discharge hole is provided between the other end and the other side of the tank body.

[0012] In one embodiment, the metal removal assembly further includes a first support and a second support, which are respectively installed on both sides of the tank body. The fourth demagnetizer is installed on the first support and the fifth demagnetizer is installed on the second support. The metal removal assembly also includes a third demagnetizer, which is installed on the inner wall of the tank body and disposed between the third vent and the second vent.

[0013] In one embodiment, the metal removal assembly further includes a fourth vent, a fourth nozzle, a fifth vent, and a fifth nozzle. The fourth vent and the fifth vent are respectively installed on both sides of the tank. The fourth vent is positioned above the fourth demagnetizer. Each of the fourth nozzles is inclined downwards and connected to the fourth vent, and the fourth nozzle is used to blow air towards the fourth demagnetizer. The fifth vent is positioned above the fifth demagnetizer. Each of the fifth nozzles is inclined downwards and connected to the fifth vent, and the fifth nozzle is used to blow air towards the fifth demagnetizer.

[0014] A method for removing impurities and recycling plastic waste, based on the aforementioned plastic waste removal and recycling device, comprises the following steps:

[0015] First impurity removal: The crushed plastic waste is fed into the tank through the feed pipe. The first nozzle blows air toward the plastic waste. Some dust and some metal scraps are discharged through the exhaust pipe. Some metal scraps are adsorbed onto the first demagnetizer.

[0016] Secondary impurity removal: Under the influence of gravity, the plastic waste continues to fall. The second nozzle blows air towards the plastic waste. Under the action of the first nozzle, some dust is discharged through the exhaust pipe, and some metal scraps are adsorbed onto the second demagnetizer. The air pressure of the second nozzle is greater than that of the first nozzle.

[0017] Third impurity removal: Under the action of gravity, the plastic waste continues to fall, and the third nozzle blows air towards the plastic waste. Some of the dust is blown towards the second nozzle, and under the action of the second nozzle and the first nozzle, it is discharged through the suction pipe; the air pressure of the third nozzle is greater than the air pressure of the second nozzle.

[0018] Recycling: During the impurity removal process, some plastic waste falls towards the discharge pipe under the influence of gravity; after the third impurity removal, the first nozzle stops blowing air, and the plastic waste near the first nozzle falls. Under the action of the second nozzle, the falling plastic waste is blown with air for impurity removal again; after a period of time, the second nozzle stops blowing air, and the plastic waste near the second nozzle falls. Under the action of the third nozzle, the falling plastic waste is blown with air for impurity removal again; finally, the third nozzle stops blowing air, and the plastic waste falls towards the discharge pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The plastic waste removal and recycling device of the present invention blows air towards the plastic waste through a first nozzle, a second nozzle, and a third nozzle to remove dust and metal scraps. The dust is discharged through the exhaust pipe, and the metal scraps are adsorbed by the first demagnetizer and the second demagnetizer. The second nozzle is inclined upward along the periphery of the second ventilation component, and the third nozzle is inclined upward along the periphery of the third ventilation component, so that the dust and metal scraps are blown towards the inner wall of the tank, so that the first demagnetizer and the second demagnetizer can adsorb the metal scraps. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a plastic waste removal and recycling device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A sectional view along line AA.

[0023] Figure 3 for Figure 2 A magnified view of circle B in the center.

[0024] The meanings of the numbers in the attached diagram are as follows:

[0025] 100. Plastic waste removal and recycling device;

[0026] 10. Storage tank; 11. Tank body; 12. Feed pipe; 13. Exhaust pipe; 14. Discharge pipe; 20. Dust removal assembly; 21. First venting component; 22. First nozzle; 23. Second venting component; 24. Second nozzle; 25. Third venting component; 26. Third nozzle; 27. Fixing frame; 271. First support part; 272. Second support part; 273. Third support part; 28. First support leg; 29. ​​Second support leg;

[0027] 30. Metal removal component; 31. First demagnetizer; 32. Second demagnetizer; 33. Second support; 34. Fourth demagnetizer; 340. First discharge port; 35. Fifth demagnetizer; 350. Second discharge port; 36. First upright; 37. Fourth ventilation component; 38. Fourth nozzle; 39. Fifth nozzle. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

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

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Please refer to Figures 1 to 3A plastic waste removal and recycling device 100 according to one embodiment of the invention includes a storage tank 10, a dust removal assembly 20, and a metal removal assembly 30. The storage tank 10 includes a tank body 11, an inlet pipe 12, an exhaust pipe 13, and a discharge pipe 14. The inlet pipe 12 and the exhaust pipe 13 are both connected to the top of the tank body 11, and the discharge pipe 14 is connected to the bottom of the tank body 11. The dust removal assembly 20 includes a first venting component 21, a first nozzle 22, a second venting component 23, a second nozzle 24, a third venting component 25, and a third nozzle 26. The first venting component 21, the second venting component 23, and the third venting component 25 are arranged along the axial direction of the tank body 11. There are multiple first nozzles 22, second nozzles 24, and third nozzles 26. The air component 21 is located below the feed pipe 12. Each first nozzle 22 is inclined upward and connected to the first air component 21. Each second nozzle 24 is inclined upward and connected to the second air component 23. Each second nozzle 24 is arranged circumferentially along the second air component 23. Each third nozzle 26 is inclined upward and connected to the third air component 25. Each third nozzle 26 is arranged circumferentially along the third air component 25. The metal removal component 30 includes a first demagnetizer 31 and a second demagnetizer 32. Both the first demagnetizer 31 and the second demagnetizer 32 are installed on the inner wall of the tank 11. The first demagnetizer 31 is located between the first air component 21 and the feed pipe 12. The second demagnetizer 32 is located between the second air component 23 and the first air component 21. The plastic waste removal and recycling device 100 of this embodiment blows air towards the plastic waste through the first nozzle 22, the second nozzle 24 and the third nozzle 26 to remove dust and metal scraps. The dust is discharged through the exhaust pipe 13 and the metal scraps are adsorbed by the first demagnetizer 31 and the second demagnetizer 32. The second nozzle 24 is inclined upward along the periphery of the second ventilation member 23 and the third nozzle 26 is inclined upward along the periphery of the third ventilation member 25 to blow the dust and metal scraps toward the inner wall of the tank 11 so that the first demagnetizer 31 and the second demagnetizer 32 can adsorb the metal scraps.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the storage tank 10 includes a tank body 11, a feed pipe 12, an exhaust pipe 13, and a discharge pipe 14. The feed pipe 12 and the exhaust pipe 13 are both connected to the top of the tank body 11, and the discharge pipe 14 is connected to the bottom of the tank body 11. Optionally, the bottom of the tank body 11 is in the shape of an inverted funnel. The feed pipe 12 is located on the central axis of the tank body 11, and the end of the exhaust pipe 13 away from the tank body 11 is connected to an air pump.

[0036] Please refer to the following: Figure 2 and Figure 3The dust removal assembly 20 includes a first venting element 21, a first nozzle 22, a second venting element 23, a second nozzle 24, a third venting element 25, and a third nozzle 26. The first venting element 21, the second venting element 23, and the third venting element 25 are arranged along the axial direction of the tank body 11. There are multiple first nozzles 22, second nozzles 24, and third nozzles 26. The first venting element 21 is located below the feed pipe 12, and optionally, the first venting element 21 is located on the central axis of the tank body 11. Each first nozzle 22 is inclined upward and connected to the first venting element 21. The first nozzle 22 blows air towards the plastic waste, and some dust and some metal scraps are discharged through the extraction pipe 13. Each second nozzle 24 is inclined upward and connected to the second vent 23, and the second nozzle 24 is arranged circumferentially along the second vent 23; each third nozzle 26 is inclined upward and connected to the third vent 25, and the third nozzle 26 is arranged circumferentially along the third vent 25; Optionally, the end of the first nozzle 22 away from the first vent 21 extends inclined upward toward the inner wall of the tank 11; the end of the second nozzle 24 away from the second vent 23 extends inclined upward toward the inner wall of the tank 11; the end of the third nozzle 26 away from the third vent 25 extends inclined upward toward the inner wall of the tank 11, thereby blowing dust and metal scrap toward the inner wall of the tank 11.

[0037] In one embodiment, the first vent 21 is conical. During the falling process of plastic waste, some of the plastic waste slides along the outer side of the first vent 21 and disperses towards the periphery of the tank 11. The first nozzle 22 blows some of the plastic waste towards the periphery of the tank 11 so that the airflow from the second nozzle 24 and the third nozzle 26 can contact more plastic waste. In one embodiment, both the second vent 23 and the third vent 25 are arranged along the periphery of the tank 11. Optionally, both the second vent 23 and the third vent 25 are cylindrical, with the diameter of the second vent 23 being larger than the diameter of the first vent 21, and the diameter of the third vent 25 being larger than the diameter of the second vent 23, so that the second nozzle 24 and the third nozzle 26 spray airflow towards different areas, thereby allowing the airflow to contact different plastic waste. Further, the second nozzle 24 and the third nozzle 26 are staggered so that the second nozzle 24 and the third nozzle 26 spray airflow towards different areas.

[0038] like Figure 2As shown, the dust removal assembly 20 also includes a first air pipe (not shown), a second air pipe (not shown), and a third air pipe (not shown). One end of the first air pipe is connected to a first venting element 21, and the other end is connected to an air pump. One end of the second air pipe is connected to a second venting element 23, and the other end is connected to an air pump. One end of the third air pipe is connected to a third venting element 25, and the other end is connected to an air pump. The dust removal assembly 20 also includes a fixing frame 27, which includes a first support part 271, a second support part 272, and a third support part 273. One end of the second support part 272 is connected to the first support part 271, and the other end is connected to the third support part 273. There are multiple second support parts 272, and each second support part 272 is spaced apart along the periphery of the first support part 271. There is a gap between adjacent second support parts 272 to allow plastic waste to fall. The first venting element 21 is installed on the first support part 271, and the third support part 273 is installed on the tank body 11. Optionally, the third support part 273 is in the shape of a cylindrical tube.

[0039] like Figure 2 and Figure 3 As shown, the dust removal assembly 20 also includes a first support leg 28, a second support leg 29, and a third support leg (not shown). The first support leg 28, the second support leg 29, and the third support leg are all installed on the inner wall of the tank body 11. A third support portion 273 is installed on the first support leg 28, a second venting component 23 is installed on the second support leg 29, and a third venting component 25 is installed on the third support leg. Optionally, there are multiple first support legs 28, second support legs 29, and third support legs, each arranged along the periphery of the tank body 11. In one embodiment, the air pressure of the second nozzle 24 is greater than the air pressure of the first nozzle 22, and the air pressure of the third nozzle 26 is greater than the air pressure of the second nozzle 24, to accommodate different weights of plastic waste and metal scrap.

[0040] Please check again. Figure 2 and Figure 3The metal removal component 30 includes a first demagnetizer 31 and a second demagnetizer 32. Both the first demagnetizer 31 and the second demagnetizer 32 are installed on the inner wall of the tank 11. The first demagnetizer 31 is disposed between the first venting component 21 and the feed pipe 12 to adsorb metal waste blown up by the first nozzle 22. The second demagnetizer 32 is disposed between the second venting component 23 and the first venting component 21 to adsorb metal waste blown up by the second nozzle 24. In one embodiment, the metal removal assembly 30 further includes a first bracket (not shown) and a second bracket 33, which are respectively installed on the inner side of the tank 11. A first demagnetizer 31 is installed on the first bracket, and a second demagnetizer 32 is installed on the second bracket 33. The metal removal assembly 30 also includes a third demagnetizer (not shown) and a third bracket (not shown). The third demagnetizer is installed on the inner wall of the tank 11 and is positioned between the third vent and the second vent 23 to adsorb metal shavings blown up by the third nozzle 26. The third bracket is installed on the inner side of the tank, and the third demagnetizer is installed on the third bracket. Optionally, the first bracket, the second bracket 33, and the third bracket are all made of insulating material, and the first demagnetizer 31, the second demagnetizer 32, and the third demagnetizer are all electromagnetizers.

[0041] like Figure 2 As shown, in addition to the metal component 30, there are also a fourth demagnetizer 34 and a fifth demagnetizer 35. The fourth demagnetizer 34 and the fifth demagnetizer 35 are respectively connected to the two sides of the tank body 11. The fourth demagnetizer 34 is located below the third venting component 25, and the fifth demagnetizer 35 is located below the fourth demagnetizer 34. Both the fourth demagnetizer 34 and the fifth demagnetizer 35 are inclined downwards. One end of the fourth demagnetizer 34 is installed on one side of the tank body 11, and the other end is provided with a first discharge hole 340 between it and the other side of the tank body 11. One end of the fifth demagnetizer 35 is installed on one side of the tank body 11, and the other end is provided with a second discharge hole 350 between it and the other side of the tank body 11. The plastic waste falls to the fourth demagnetizer 34 for demagnetization, then slides through the first discharge hole 340 to the fifth demagnetizer 35 for further demagnetization, and finally slides through the second discharge hole 350 to the discharge pipe 14. In one embodiment, in addition to the metal component 30, there are also a first support 36 and a second support (not shown in the figure). The first support 36 and the second support are respectively installed on both sides of the tank body 11. The fourth demagnetizer 34 is installed on the first support 36 and the fifth demagnetizer 35 is installed on the second support. Optionally, the first support 36 and the second support are both made of insulating material, and the fourth demagnetizer 34 and the fifth demagnetizer 35 are both electric demagnetizers.

[0042] In one embodiment, in addition to the metal assembly 30, the assembly also includes a fourth vent 37, a fourth nozzle 38, a fifth vent (not shown), and a fifth nozzle 39. The fourth vent 37 and the fifth vent are respectively installed on both sides of the tank 11. The fourth vent 37 is positioned above the fourth demagnetizer 34. Each fourth nozzle 38 is inclined downwards and connected to the fourth vent 37. The fourth nozzle 38 is used to blow air onto the fourth demagnetizer 34 to remove metal debris from the fourth demagnetizer 34. The fifth vent is positioned above the fifth demagnetizer 35. Each fifth nozzle 39 is inclined downwards and connected to the fifth vent. The fifth nozzle 39 is used to blow air onto the fifth demagnetizer 35 to remove metal debris from the fifth demagnetizer 35. Optionally, both the fourth vent 37 and the fifth vent are arc-shaped tubular structures.

[0043] In use, the crushed plastic waste is fed into the tank 11 through the feed pipe 12. The first nozzle 22 blows air toward the plastic waste. Some dust and some metal scraps are discharged through the exhaust pipe 13. Some metal scraps are adsorbed onto the first demagnetizer 31. In addition, the first nozzle 22 blows some plastic waste toward the periphery of the tank 11. Some plastic waste slides down the outside of the first ventilation component 21 and disperses toward the periphery of the tank 11. Next, under the influence of gravity, the plastic waste continues to fall. The second nozzle 24 blows air towards the plastic waste, and some of the dust blown up is discharged through the exhaust pipe 13 under the action of the first nozzle 22. Some of the metal scraps are adsorbed onto the second demagnetizer 32. Then, under the influence of gravity, the plastic waste continues to fall, and the third nozzle 26 blows air towards the plastic waste. Some of the dust blown up is blown towards the second nozzle 24. Under the action of the second nozzle 24 and the first nozzle 22, it is discharged through the exhaust pipe 13. Some of the metal scraps are adsorbed onto the third demagnetizer. Moreover, during the impurity removal process, under the influence of gravity, some of the plastic waste falls towards the discharge pipe 14. Optionally, during the falling process, the plastic waste first falls to the fourth demagnetizer 34 for demagnetization, and then passes through the fifth demagnetizer 35 for further demagnetization.

[0044] When plastic waste needs to be recycled, the first nozzle 22 stops blowing air, and the plastic waste near the first nozzle 22 falls. Under the action of the second nozzle 24, the falling plastic waste is blown with air to remove impurities again. After a period of time, the second nozzle 24 stops blowing air, and the plastic waste near the second nozzle 24 falls. Under the action of the third nozzle 26, the falling plastic waste is blown with air to remove impurities again. Finally, the third nozzle 26 stops blowing air, and the plastic waste falls towards the discharge pipe 14. Optionally, during the falling process, the plastic waste first falls to the fourth demagnetizer 34 for demagnetization, and then passes through the fifth demagnetizer 35 for further demagnetization.

[0045] When cleaning is required, the first demagnetizer 31, the second demagnetizer 32, the third demagnetizer, the fourth demagnetizer 34, and the fifth demagnetizer 35 are de-energized. The first nozzle 22 blows air towards the first demagnetizer 31, blowing some metal scraps and dust towards the exhaust pipe 13, and some metal scraps fall off. The second nozzle 24 blows air towards the second demagnetizer 32, and the third nozzle 26 blows air towards the third demagnetizer, blowing metal scraps and dust towards the exhaust pipe 13. Then, the fourth nozzle 38 blows air towards the fourth demagnetizer 34, blowing metal scraps and dust towards the fifth demagnetizer 35. The fifth nozzle 39 then blows air towards the fifth demagnetizer 35, blowing metal scraps and dust towards the discharge pipe 14, making cleaning convenient.

[0046] This plastic waste removal and recycling device 100 performs multiple impurity removal stages during the removal phase and further impurity removal during the recycling phase, achieving excellent impurity removal results. Each second nozzle 24 is inclined upwards along the periphery of the second vent 23, and each third nozzle 26 is inclined upwards along the periphery of the third vent 25, blowing dust and metal shavings towards the inner wall of the tank 11 so that the first demagnetizer 31, the second demagnetizer 32, and the third demagnetizer can adsorb the metal shavings.

[0047] An embodiment of the present invention provides a method for removing impurities and recycling plastic waste, which, based on the above embodiment, comprises the following steps:

[0048] First impurity removal: The crushed plastic waste is fed into the tank 11 through the feed pipe 12. The first nozzle 22 blows air towards the plastic waste. Some dust and some metal scraps are discharged through the exhaust pipe 13. Some metal scraps are adsorbed onto the first demagnetizer 31.

[0049] Secondary impurity removal: Under the action of gravity, the plastic waste continues to fall, and the second nozzle 24 blows air towards the plastic waste. Under the action of the first nozzle 22, some dust is discharged through the exhaust pipe 13, and some metal waste is adsorbed onto the second demagnetizer 32; the air pressure of the second nozzle 24 is greater than the air pressure of the first nozzle 22.

[0050] Third impurity removal: Under the action of gravity, the plastic waste continues to fall, and the third nozzle 26 blows air towards the plastic waste. Some of the dust is blown towards the second nozzle 24. Under the action of the second nozzle 24 and the first nozzle 22, it is discharged through the exhaust pipe 13. Some metal waste is adsorbed on the third demagnetizer. The air pressure of the third nozzle 26 is greater than the air pressure of the second nozzle 24.

[0051] Recycling: During the impurity removal process, some plastic waste falls towards the discharge pipe 14 under the influence of gravity. Optionally, during the impurity removal process, some plastic waste slides to the fourth demagnetizer 34 under the influence of gravity, and then slides to the fifth demagnetizer 35 for further demagnetization. After the third impurity removal, the first nozzle 22 stops blowing air, and the plastic waste near the first nozzle 22 falls. Under the action of the second nozzle 24, the falling plastic waste is blown with air for impurity removal again. After a period of time, the second nozzle 24 stops blowing air, and the plastic waste near the second nozzle 24 falls. Under the action of the third nozzle 26, the falling plastic waste is blown with air for impurity removal again. Finally, the third nozzle 26 stops blowing air, and the plastic waste falls towards the discharge pipe 14. Further, after the third nozzle 26 stops blowing air, the plastic waste slides to the fourth demagnetizer 34, and then slides to the fifth demagnetizer 35 for further demagnetization.

[0052] The plastic waste removal and recycling device 100 of the present invention blows air towards the plastic waste through the first nozzle 22, the second nozzle 24 and the third nozzle 26 respectively to remove dust and metal scraps. The dust is discharged through the exhaust pipe 13 and the metal scraps are adsorbed by the first demagnetizer 31 and the second demagnetizer 32. The second nozzle 24 is inclined upward along the periphery of the second ventilation member 23 and the third nozzle 26 is inclined upward along the periphery of the third ventilation member 25 to blow the dust and metal scraps toward the inner wall of the tank 11 so that the first demagnetizer 31 and the second demagnetizer 32 can adsorb the metal scraps.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A plastic waste removal and recycling device, characterized in that, The system includes a storage tank, a dust removal assembly, and a metal removal assembly. The storage tank comprises a tank body, an inlet pipe, an exhaust pipe, and a discharge pipe. The inlet pipe and the exhaust pipe are both connected to the top of the tank body, and the discharge pipe is connected to the bottom of the tank body. The dust removal assembly includes a first venting element, a first nozzle, a second venting element, a second nozzle, a third venting element, and a third nozzle. The first venting element, the second venting element, and the third venting element are arranged along the axial direction of the tank body. There are multiple first nozzles, second nozzles, and third nozzles. The first venting element is located below the inlet pipe, and each first nozzle is inclined upwards and connected to the first venting element. Each second nozzle is inclined upward and connected to the second venting element, and each second nozzle is arranged circumferentially along the second venting element; each third nozzle is inclined upward and connected to the third venting element, and each third nozzle is arranged circumferentially along the third venting element; the metal removal assembly includes a first demagnetizer and a second demagnetizer, both of which are installed on the inner wall of the tank body. The first demagnetizer is disposed between the first venting element and the feed pipe, and the second demagnetizer is disposed between the second venting element and the first venting element; the first venting element is conical in shape; Both the second and third venting components are arranged along the periphery of the tank body; both the second and third venting components are cylindrical, with the diameter of the second venting component being larger than the diameter of the first venting component, and the diameter of the third venting component being larger than the diameter of the second venting component; the air pressure of the second nozzle is greater than the air pressure of the first nozzle, and the air pressure of the third nozzle is greater than the air pressure of the second nozzle; the metal removal assembly also includes a third demagnetizer, which is installed on the inner wall of the tank body and disposed between the third venting component and the second venting component.

2. The plastic waste removal and recycling device according to claim 1, characterized in that, The second nozzle and the third nozzle are arranged alternately.

3. The plastic waste removal and recycling device according to claim 1, characterized in that, The dust removal assembly also includes a fixing frame, which includes a first support part, a second support part, and a third support part. One end of the second support part is connected to the first support part, and the other end is connected to the third support part. There are multiple second support parts, and each second support part is arranged along the periphery of the first support part. The first venting element is installed on the first support part, and the third support part is installed on the tank body.

4. The plastic waste removal and recycling device according to claim 3, characterized in that, The dust removal assembly further includes a first support leg, a second support leg, and a third support leg. The first support leg, the second support leg, and the third support leg are all installed on the inner wall of the tank. The third support part is installed on the first support leg, the second venting component is installed on the second support leg, and the third venting component is installed on the third support leg.

5. The plastic waste removal and recycling device according to claim 1, characterized in that, The metal removal assembly further includes a fourth demagnetizer and a fifth demagnetizer, which are respectively connected to the two sides of the tank body. The fourth demagnetizer is located below the third vent, and the fifth demagnetizer is located below the fourth demagnetizer. Both the fourth and fifth demagnetizers are inclined downwards. One end of the fourth demagnetizer is installed on one side of the tank body, and a first discharge hole is provided between the other end and the other side of the tank body. One end of the fifth demagnetizer is installed on one side of the tank body, and a second discharge hole is provided between the other end and the other side of the tank body.

6. The plastic waste removal and recycling device according to claim 5, characterized in that, The metal removal assembly also includes a first stand and a second stand, which are respectively installed on both sides of the tank. The fourth demagnetizer is installed on the first stand and the fifth demagnetizer is installed on the second stand.

7. The plastic waste removal and recycling device according to claim 5, characterized in that, The metal removal assembly further includes a fourth vent, a fourth nozzle, a fifth vent, and a fifth nozzle. The fourth vent and the fifth vent are respectively installed on both sides of the tank. The fourth vent is positioned above the fourth demagnetizer, and each of the fourth nozzles is inclined downwards and connected to the fourth vent. The fourth nozzle is used to blow air towards the fourth demagnetizer. The fifth vent is positioned above the fifth demagnetizer, and each of the fifth nozzles is inclined downwards and connected to the fifth vent. The fifth nozzle is used to blow air towards the fifth demagnetizer.

8. A method for removing impurities and recycling plastic waste, characterized in that, The plastic waste removal and recycling device according to claim 1 comprises the following steps: First impurity removal: The crushed plastic waste is fed into the tank through the feed pipe. The first nozzle blows air toward the plastic waste. Some dust and some metal scraps are discharged through the exhaust pipe. Some metal scraps are adsorbed onto the first demagnetizer. Secondary impurity removal: Under the influence of gravity, the plastic waste continues to fall. The second nozzle blows air towards the plastic waste. Under the action of the first nozzle, some dust is discharged through the exhaust pipe, and some metal scraps are adsorbed onto the second demagnetizer. The air pressure of the second nozzle is greater than that of the first nozzle. Third impurity removal: Under the action of gravity, the plastic waste continues to fall, and the third nozzle blows air towards the plastic waste. Some of the dust is blown towards the second nozzle, and under the action of the second nozzle and the first nozzle, it is discharged through the suction pipe; the air pressure of the third nozzle is greater than the air pressure of the second nozzle. Recycling: During the impurity removal process, under the influence of gravity, some plastic waste falls towards the discharge pipe; after the third impurity removal, the first nozzle stops blowing air, and the plastic waste near the first nozzle falls. Under the action of the second nozzle, the falling plastic waste is blown with air for impurity removal again; after a period of time, the second nozzle stops blowing air, and the plastic waste near the second nozzle falls. Under the action of the third nozzle, the falling plastic waste is blown with air for impurity removal again; finally, the third nozzle stops blowing air, and the plastic waste falls towards the discharge pipe. When cleaning is required, the first, second, and third demagnetizers are de-energized. The first nozzle blows air towards the first demagnetizer, blowing some metal scraps and dust towards the exhaust pipe, and some metal scraps fall off. The second nozzle blows air towards the second demagnetizer, and the third nozzle blows air towards the third demagnetizer, blowing metal scraps and dust towards the exhaust pipe.

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