Silicon-containing glue waste sorting machine sorting roller set and sorting method

Abstract

This invention provides a sorting roller assembly and sorting method for silica-containing waste, belonging to the technical field of silica-sorting machines. It includes a drive roller, a driven roller, and a conveyor belt, with a plurality of small holes arranged in an array on the conveyor belt. An air supply chamber is located on the inner side of the conveyor belt near the driven roller, and an exhaust port at the top of the air supply chamber contacts the conveyor belt, used to blow airflow from the inside of the conveyor belt to the outside, causing the small holes to form an airflow perpendicular to the conveying direction of the conveyor belt and flowing outwards. By setting an array of small holes on the conveyor belt and an air supply chamber on the inner side of the conveyor belt, an air curtain is formed on the surface of the conveyor belt. Simultaneously, a negative pressure channel is connected above the first recovery chamber. Lighter materials adsorbed by the conveyor belt are first forcibly blown off the surface of the conveyor belt by the air curtain, and then sucked upwards into the upper part of the first recovery chamber by negative pressure, while heavier silica particles are discharged from the lower discharge channel, achieving the separation of light impurities from silica.

Description

Technical Field

[0001] This invention belongs to the technical field of silica gel sorting machines, specifically referring to a sorting roller assembly and sorting method for silica gel waste. Background Technology

[0002] Silica gel separators are devices that achieve highly efficient separation of solid waste based entirely on physical principles in the resource recovery process. Their core technology leverages the significant differences in physical properties, such as elasticity, coefficient of friction, and impact recovery coefficient, between silicone rubber and other mixed materials (e.g., rigid plastics, metals, glass). During operation, the mixed materials are ejected by high-speed rotating sorting rollers. The highly elastic silicone gel particles exhibit a greater rebound distance or bounce height, while rigid materials like plastic sheets and metals absorb more energy and rebound less or simply slide off. This efficiently extracts silicone gel from the mixed solid waste. The entire process requires no water or chemical reagents, making it a clean and low-energy physical sorting technology.

[0003] In actual operation, it has been found that in order to improve sorting efficiency, the sorting rollers usually need to maintain a high rotation speed. This causes the surface of the rollers to generate a high-speed airflow, which has an adsorption effect on lightweight films and foamed impurities in the material. For example, lightweight impurities with small mass and large windward area, such as plastic film fragments, polyurethane foam, and polyethylene foam, are easily attracted by the airflow and fall into the silica gel hopper. This results in a significant increase in the impurity content of the recycled silica gel product and a substantial decrease in sorting purity. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a sorting roller group and sorting method for a silica-containing waste sorting machine, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a sorting roller group for a silica gel waste sorting machine, comprising: Active roller; Driven roller; A conveyor belt wound around the driving roller and the driven roller, the conveyor belt having a plurality of small holes arranged in an array through the upper and lower surfaces of the conveyor belt; The conveyor belt has an air supply chamber on its inner side near the driven roller. The top of the air supply chamber has an exhaust port that contacts the conveyor belt. This port is used to blow airflow from the inside of the conveyor belt to the outside, so that the small holes form an airflow that is perpendicular to the conveying direction of the conveyor belt and flows outward. A first recycling bin is installed at the driven roller. The first recycling bin has a feed inlet on the side near the driven roller and a discharge channel below the first recycling bin. A negative pressure channel is connected above the first recycling bin. The negative pressure channel is connected to an external blower to generate negative pressure at the feed inlet and to form an upward airflow within the first recycling bin.

[0006] Furthermore, one end of the air supply chamber is connected to a high-pressure air pipe, which is connected to an external air supply device for supplying air into the air supply chamber so that the exhaust port can blow airflow onto the conveyor belt.

[0007] Furthermore, an ion air bar is installed inside the gas supply chamber, and the ion air bar is connected to an external ion generator.

[0008] Furthermore, the air supply chamber is located inside the conveyor belt and close to the driven roller, so that the conveyor belt passes through the air outlet area of ​​the air supply chamber before passing around the driven roller.

[0009] Furthermore, the length of the gas supply chamber is greater than or equal to the width of the conveyor belt.

[0010] Furthermore, each end of the air supply chamber is fixed with a bracket, and a base is provided below the bracket. The base is fixed to the equipment, and a spring is connected between the bracket and the base. The spring is configured to apply an elastic thrust to the air supply chamber to move upward, so that the air supply chamber is always in contact with the conveyor belt.

[0011] Furthermore, a limiting pin is fixed on the base, and the top end of the limiting pin is slidably connected to the bracket.

[0012] Furthermore, it also includes a vibrating feeder, which is located diagonally above the drive roller and is used to uniformly feed materials onto the conveyor belt in the area corresponding to the drive roller.

[0013] Furthermore, it also includes a second recovery bin, located below the drive roller, for collecting material that was not thrown into the first recovery bin.

[0014] A method for separating silica gel, based on the sorting roller group of the aforementioned silica gel waste sorting machine, includes the following steps: Step 1: The mixed materials are conveyed to the vibrating feeder, which then uniformly feeds the materials from above the drive roller onto the conveyor belt in the corresponding area of ​​the drive roller. Step 2: The drive roller rotates at high speed, driving the conveyor belt and the driven roller to operate. The highly elastic silicone particles are thrown towards the first recycling bin by utilizing the elasticity difference, while the remaining material falls into the second recycling bin. Step 3: The air supply chamber blows air from the inside to the outside of the conveyor belt, passing through the small holes on the conveyor belt to form an airflow perpendicular to the conveyor belt, which blows away the light materials adsorbed by the high-speed operation of the conveyor belt upwards. Step 4: The negative pressure channel generates negative pressure at the feed inlet, which draws the blown-off lightweight material into the upper part of the first recycling chamber. At the same time, the silica gel particles are discharged from the discharge channel below the first recycling chamber, thereby achieving the separation of lightweight material and silica gel.

[0015] Beneficial effects: 1. By setting an array of small holes on the conveyor belt and an air supply chamber on the inner side of the conveyor belt, an air curtain is formed on the surface of the conveyor belt. At the same time, a negative pressure channel is connected above the first recovery chamber. Light materials adsorbed by the conveyor belt are first forcibly blown off the surface of the conveyor belt by the air curtain, and then sucked upward into the upper part of the first recovery chamber by negative pressure. Meanwhile, heavier silica particles are discharged from the lower unloading channel due to gravity, thus achieving efficient separation of light impurities and silica.

[0016] 2. By installing ion air bars in the air supply chamber and connecting them to an external ion generator, the ion air bars, along with the compressed air introduced through the high-pressure air pipe, blow ion air onto the surface of the conveyor belt and diffuse it inside the equipment. The static electricity generated by friction on the lightweight materials on the conveyor belt is neutralized in time, thereby eliminating the electrostatic adsorption force. At the same time, the electrostatic binding between material particles is also eliminated, allowing the silica gel particles to be fully exposed and improving the sorting purity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a sorting roller assembly for a silica gel waste sorting machine according to an embodiment of the present invention; Figure 2 This is a side view of a sorting roller assembly for a silica gel waste sorting machine according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first recycling bin in the sorting roller group of a silica gel waste sorting machine according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the air supply chamber in the sorting roller group of a silica gel waste sorting machine according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the air supply chamber in the sorting roller group of a silica gel waste sorting machine according to an embodiment of the present invention.

[0018] Among them, 1. driving roller; 2. driven roller; 3. conveyor belt; 4. air supply chamber; 401. exhaust port; 41. high-pressure air pipe; 42. ion air bar; 43. bracket; 44. base; 45. spring; 5. first recovery chamber; 501. feed inlet; 502. unloading channel; 503. negative pressure channel; 6. vibrating feeder; 7. second recovery chamber.

[0019] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0021] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments 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 the embodiments.

[0022] Combination Figures 1-5 As shown, an embodiment of the present invention provides a sorting roller group for a silica-containing waste sorting machine, including a driving roller 1, a driven roller 2, and a conveyor belt 3 wound around both.

[0023] Combination Figure 1 and Figure 2 As shown, the sorting roller group is arranged in two symmetrical sets, and correspondingly, the air supply chamber 4, the first recovery chamber 5 and the vibrating feeder 6 are also arranged in two symmetrical sets.

[0024] It is understandable that the active rollers 1 in the two sets of sorting rollers are close to each other, while the driven rollers 2 are far apart. Therefore, by setting a second recovery bin 7 below the two active rollers 1, and the second recovery bin 7 can cover the material drop area of ​​the two active rollers 1, the material can be collected.

[0025] Furthermore, the two first recovery bins 5 are located at positions corresponding to the two driven rollers 2, respectively, and are used to receive the silicone separated by the two component sorting rollers.

[0026] The two vibrating feeders 6 are also positioned close to each other, and the feeding ends of the two vibrating feeders 6 are also close to each other. Therefore, by adding a diverter plate, only one feeding device is needed.

[0027] It should be noted that the drive roller 1 in the two sorting roller groups shares a common power source through the transmission structure.

[0028] By symmetrically setting two groups of sorting rollers, and having the sorting rollers share a single feeding device and power source, sorting efficiency is improved.

[0029] Combination Figure 1 and Figure 2 As shown, the driving roller 1 and the driven roller 2 are steel cylindrical rollers with a wear-resistant rubber layer on their outer surface to increase the friction coefficient with the conveyor belt 3. Both ends of the driving roller 1 and the driven roller 2 are mounted on the frame through bearing seats, and one end of the driving roller 1 is connected to the power source. The driving roller 1 is driven by a motor to rotate at high speed, which drives the conveyor belt 3 and the driven roller 2 to run.

[0030] Furthermore, the conveyor belt 3 is made of rubber or polyurethane material, and its surface is arrayed with several small holes that penetrate the upper and lower surfaces of the conveyor belt. The diameter of the small holes is preferably 1mm to 3mm, and the opening rate is about 40% to ensure smooth airflow while maintaining sufficient structural strength.

[0031] Combination Figure 2 and Figure 4 As shown, an air supply chamber 4 is provided on the side of the conveyor belt 3 near the driven roller 2 (i.e., the inner side of the conveyor belt). The air supply chamber 4 is a long, hollow box with a long exhaust port 401 on its top. The exhaust port 401 is in direct contact with the inner surface of the conveyor belt 3. One end of the air supply chamber 4 is connected to a high-pressure air pipe 41, which is connected to an external air compressor or other air supply equipment. When the air supply equipment introduces compressed air into the air supply chamber 4, the gas is blown out from the exhaust port 401 and passes through the small holes on the conveyor belt 3, forming an air curtain on the outer surface of the conveyor belt 3 that is perpendicular to the conveying direction of the conveyor belt and flows outward from the surface of the conveyor belt. This air curtain can effectively blow light impurities upward away from the surface of the conveyor belt.

[0032] It should be noted that the air supply chamber 4 is located inside the conveyor belt 3 and close to the driven roller 2, so that the conveyor belt 3 passes through the air outlet area of ​​the air supply chamber 4 before passing around the driven roller 2. Correspondingly, after the material is ejected from the driving roller 1, it moves along the straight section of the conveyor belt 3 toward the driven roller 2. Before reaching the driven roller 2, the material will pass through the area corresponding to the air supply chamber 4, so that the light impurities in the material can be effectively stripped off before it enters the first recycling chamber 5.

[0033] Furthermore, the length of the air supply chamber 4 is greater than or equal to the width of the conveyor belt 3. In this embodiment, the length of the air supply chamber 4 is 20mm longer than the width of the conveyor belt to ensure that a uniform airflow can be obtained throughout the entire width of the conveyor belt.

[0034] In an optional embodiment, to ensure a good seal between the air supply chamber 4 and the conveyor belt 3, and to reduce friction and wear, a polytetrafluoroethylene (PTFE) strip is embedded at the edge of the exhaust port 401. This strip has self-lubricating properties and a low coefficient of friction. When the conveyor belt 3 is running, the PTFE strip slides against the inner surface of the conveyor belt 3, resulting in low frictional resistance, low heat generation, and good airtightness.

[0035] Combination Figure 4 and Figure 5 As shown, brackets 43 are fixed at both ends of the air supply chamber 4, and a base 44 is installed below the brackets 43. The base 44 is fixed to the equipment frame by bolts. A spring 45 is connected between the brackets 43 and the base 44. When the spring 45 is in a compressed state, it applies an upward elastic thrust to the air supply chamber 4, ensuring that the exhaust port 401 at the top of the air supply chamber 4 is always in close contact with the inner surface of the conveyor belt 3. Even if the conveyor belt 3 experiences slight loosening or jumping during long-term operation, the spring 45 can automatically compensate for the gap, ensuring the blowing effect.

[0036] Furthermore, a limit pin is fixed on the base 44, and the top of the limit pin is slidably connected to the bracket 43 to prevent the air supply chamber 4 from shifting laterally.

[0037] Combination Figure 1 , Figure 2 and Figure 3 As shown, a first recycling bin 5 is installed at the driven roller 2. The first recycling bin 5 has a feed inlet 501 on the side near the driven roller 2, and the feed inlet 501 faces the discharge direction of the conveyor belt 3. A discharge channel 502 is provided below the first recycling bin 5 for discharging the settled silica gel particles.

[0038] Furthermore, a negative pressure channel 503 is connected above the first recovery chamber 5. The negative pressure channel 503 is connected to an external induced draft fan. When the induced draft fan is working, a negative pressure is generated at the feed inlet 501, and at the same time, an upward airflow is formed throughout the entire first recovery chamber 5. This upward airflow cooperates with the air curtain blown out of the air supply chamber 4 to further attract the blown-off lightweight impurities (such as plastic film, foam materials, etc.) upward, and discharge them through the negative pressure channel 503 or collect them in the subsequent dust removal system; while the larger silica gel particles overcome the drag of the upward airflow due to gravity and are discharged from the unloading channel 502.

[0039] Combination Figure 1 and Figure 2 As shown, a vibrating feeder 6 is provided diagonally above the drive roller 1. The discharge port of the vibrating feeder 6 is aligned with the conveyor belt 3 in the area above the drive roller 1. The conveyor belt 3 in this area is still wrapped around the drive roller 1, forming an arc-shaped impact surface.

[0040] Furthermore, a second recycling bin 7 is provided below the active roller 1 to collect other materials such as hard plastics, metals, and glass that were not thrown into the first recycling bin 5.

[0041] Combination Figure 5 As shown, an ionizing air bar 42 is installed inside the air supply chamber 4. The ionizing air bar 42 is arranged along the length of the air supply chamber 4 and is connected to an external ion generator. When compressed air is introduced into the air supply chamber 4 through the high-pressure air pipe 41, the ionizing air bar 42 simultaneously generates ionizing air, which, along with the airflow, is blown through the exhaust port 401 onto the inner surface of the conveyor belt 3 and through small holes to reach the outer surface of the conveyor belt. The ionizing air can neutralize the static electricity generated on the surface of lightweight materials such as plastic film due to friction, preventing them from being attracted to the conveyor belt 3 by static electricity and unable to be blown away. Simultaneously, the ionizing air diffuses inside the equipment, eliminating the mutual entanglement between material particles caused by static electricity, fully exposing the silica gel particles and improving sorting efficiency.

[0042] This embodiment provides a silicone sorting method, including the following steps: Step 1: The mixed solid waste that has been crushed and screened is transported to the hopper of the vibrating feeder 6. The vibrating feeder 6 vibrates at a constant frequency, and the material is evenly and continuously fed from above the drive roller 1 onto the conveyor belt 3 in the corresponding area of ​​the drive roller 1. Since the conveyor belt 3 in this area is arc-shaped and wraps around the drive roller 1, the material impacts the surface of the high-speed moving conveyor belt at a certain incident angle. Step 2: The drive roller 1 rotates at high speed, driving the conveyor belt 3 and the driven roller 2 to operate. The highly elastic silicone particles hit the conveyor belt and gain a large rebound speed. They are then thrown towards the driven roller 2 and enter the first recycling bin 5 through the feed inlet 501. Meanwhile, rigid materials such as hard plastics and metals have poor elasticity and absorb more energy, resulting in a shorter rebound distance. They fall directly from the front or side of the conveyor belt into the second recycling bin 7. Step 3: During the operation of conveyor belt 3, compressed air is introduced into air supply chamber 4 through high-pressure air pipe 41. At the same time, ion air bar 42 is activated to generate ion air. The airflow is blown out from exhaust port 401, passes through small holes on conveyor belt 3, and forms a high-speed air curtain perpendicular to the conveyor belt and flowing outward on the outer surface of conveyor belt 3. This air curtain blows light impurities such as plastic film and polyurethane foam adsorbed by the airflow generated by the high-speed operation of the conveyor belt away from the surface of the conveyor belt. The ion air neutralizes the static electricity between the light materials and the conveyor belt, preventing the materials from being unable to be blown away due to static adhesion. At the same time, the ion air diffuses in the sorting area, eliminating static entanglement between materials. Step 4: The induced draft fan draws air from the first recovery chamber 5 through the negative pressure channel 503, creating a negative pressure zone at the inlet 501 and generating an upward airflow inside the first recovery chamber 5. Lighter impurities blown off the conveyor belt in Step 3 are drawn into the upper part of the first recovery chamber 5 under the combined action of negative pressure and upward airflow, and then enter the negative pressure channel 503 with the airflow, ultimately being collected or sent to the dust removal system. Heavier silica gel particles, after entering the first recovery chamber 5, gradually settle due to gravity exceeding the drag force of the upward airflow and are discharged from the lower discharge channel 502. Thus, the lighter impurities and silica gel are completely separated, yielding a high-purity silica gel product.

[0043] In summary, by setting an array of small holes on the conveyor belt 3 and an air supply chamber 4 located on the inner side of the conveyor belt 3 near the driven roller 2, with an exhaust port 401 at the top of the air supply chamber 4 in contact with the conveyor belt 3 and a high-pressure air pipe 41 connected to one end of the air supply chamber 4, the airflow blown from the inner side of the conveyor belt 3 to the outer side through the small holes forms an air curtain perpendicular to the surface of the conveyor belt 3. At the same time, a negative pressure channel 503 is connected above the first recovery chamber 5, forming an upward airflow inside the chamber. A negative pressure is generated at the feed inlet 501, causing the light materials adsorbed by the high-speed conveyor belt 3 to be forcibly blown away from the surface of the conveyor belt 3 by the air curtain and then sucked upward into the upper part of the first recovery chamber 5 by the negative pressure. Meanwhile, the heavier silica particles are discharged from the discharge channel 502 below due to gravity settling. This achieves efficient separation of light impurities from silica gel and significantly reduces the impurity content of the silica gel product.

[0044] By installing an ion air bar 42 inside the air supply chamber 4, which is connected to an external ion generator, the ion air bar 42 blows ion air onto the surface of the conveyor belt 3 and diffuses it inside the equipment with the compressed air introduced through the high-pressure air pipe 41. The static electricity generated by friction on the lightweight materials on the conveyor belt 3 is neutralized in time, thereby eliminating the electrostatic adsorption force. At the same time, the electrostatic binding between material particles is also eliminated, and the silica gel particles are fully exposed, improving the sorting purity.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A siliceous gel scrap sorting machine sorting roll set, characterized by, include: Active roller (1); Driven roller (2); A conveyor belt (3) is wound around the driving roller (1) and the driven roller (2), and the conveyor belt (3) is provided with a plurality of small holes that penetrate the upper and lower surfaces of the conveyor belt in an array; Among them, an air supply chamber (4) is provided on the inner side of the conveyor belt (3) near the driven roller (2). The top of the air supply chamber (4) is provided with an exhaust port (401) that contacts the conveyor belt (3) for blowing airflow from the inner side of the conveyor belt (3) to the outer side, so that the small hole forms an airflow perpendicular to the conveying direction of the conveyor belt (3) and flows outward. A first recycling bin (5) is installed at the driven roller (2). The first recycling bin (5) has a feed inlet (501) on the side near the driven roller (2). A discharge channel (502) is provided below the first recycling bin (5). A negative pressure channel (503) is connected above the first recycling bin (5). The negative pressure channel (503) is connected to an external blower to generate negative pressure at the feed inlet (501) and to form an upward airflow in the first recycling bin (5).

2. The sorting roller assembly of the silica-containing waste sorting machine according to claim 1, characterized in that: One end of the air supply chamber (4) is connected to a high-pressure air pipe (41), which is connected to an external air supply device for supplying air into the air supply chamber (4) so ​​that the exhaust port (401) can blow airflow onto the conveyor belt (3).

3. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: An ion air bar (42) is installed inside the gas supply chamber (4), and the ion air bar (42) is connected to an external ion generator.

4. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: The air supply chamber (4) is located inside the conveyor belt (3) and close to the driven roller (2), so that the conveyor belt (3) passes through the air outlet area of ​​the air supply chamber (4) before going around the driven roller (2).

5. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: The length of the gas supply chamber (4) is greater than or equal to the width of the conveyor belt (3).

6. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: Both ends of the air supply chamber (4) are fixed with brackets (43), and a base (44) is provided below the brackets (43). The base (44) is fixed on the equipment. A spring (45) is connected between the brackets (43) and the base (44). The spring (45) is configured to apply an elastic thrust to the air supply chamber (4) to move upward, so that the air supply chamber (4) is always in contact with the conveyor belt (3).

7. The sorting roller assembly of the silica-containing waste sorting machine according to claim 6, characterized in that: A limiting pin is fixed on the base (44), and the top end of the limiting pin is slidably connected to the bracket (43).

8. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: It also includes a vibrating feeder (6), which is located diagonally above the drive roller (1) and is used to uniformly feed materials onto the conveyor belt (3) in the area corresponding to the drive roller (1).

9. The silicon-bearing glazing scrap sorter roller set of claim 1, wherein: It also includes a second recycling bin (7), which is located below the active roller (1) and is used to collect materials that have not been thrown into the first recycling bin (5).

10. A method of silica gel sorting, the silica gel containing waste material sorting machine roll set according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: The mixture is conveyed to the vibrating feeder (6), and the vibrating feeder (6) evenly feeds the mixture from above the drive roller (1) onto the conveyor belt (3) in the corresponding area of ​​the drive roller (1); Step 2: The active roller (1) rotates at high speed, driving the conveyor belt (3) and the driven roller (2) to run. The high elasticity of the silicone particles is thrown towards the first recycling bin (5) by utilizing the elasticity difference, and the remaining materials fall into the second recycling bin (7). Step 3: The air supply chamber (4) blows air from the inside to the outside of the conveyor belt (3), passing through the small holes on the conveyor belt (3) to form an airflow perpendicular to the conveyor belt (3), which blows away the light materials adsorbed by the high-speed operation of the conveyor belt (3) upward. Step 4: The negative pressure channel (503) generates negative pressure at the feed inlet (501), which draws the blown-off light material into the upper part of the first recycling chamber (5), while the silica gel particles are discharged from the discharge channel (502) below the first recycling chamber (5), thereby achieving the separation of light material and silica gel.

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