Environment-friendly waste silk regeneration granulation process

Abstract

This invention relates to an environmentally friendly waste filament recycling and granulation process, comprising the following steps: raw material pretreatment, friction granulation, and post-forming treatment. The dense material output from the granulation unit is conveyed by a feeding fan to a pelletizer for cutting into standard granules. The cut granules are then conveyed by a feeding fan and a discharge pipe to the bag feeding stage. Simultaneously, any escaping material is fed into a closed-loop dust recovery system for recycling. The raw material conveying stage employs a fully enclosed pneumatic conveying system equipped with a dust recovery system. Dust escaping during production is collected in real-time by the dust recovery system, and the collected dust is recycled back to the screw feeding system for reuse. The trace amounts of oil mist generated during the friction process are purified by an oil fume purification system equipped with a plate-type electrostatic precipitator. Escaped material from the feeding stage is simultaneously fed into the closed-loop dust recovery system for recycling. Through the above-mentioned design, this invention reduces dust generation in the workshop, minimizes environmental pollution, and reduces raw material loss.

Description

Technical Field

[0001] This invention relates to the field of waste filament recycling technology, and in particular to an environmentally friendly waste filament recycling and granulation process. Background Technology

[0002] Waste filament recycling and granulation is a technology that reprocesses waste filaments into plastic granules. The production processes in industries such as textiles and chemical fibers generate large amounts of waste filaments. If these waste filaments are discarded or improperly disposed of, they not only occupy significant land resources but also cause serious environmental pollution. The emergence of waste filament recycling and granulation technology provides an effective solution to this problem. In principle, waste filament recycling and granulation primarily utilizes physical methods to transform waste filaments into granules with specific properties and uses through a series of processes, such as washing, crushing, melting, and extrusion, without altering the PET polymer chain structure. These granules can then be reused in the production of fiber products, achieving resource recycling.

[0003] Waste fiber recycling and granulation has significant economic and environmental implications. Economically, it reduces production costs for businesses, improves resource utilization efficiency, and creates new profit growth points. Environmentally, it reduces waste emissions, lessens environmental pressure, and aligns with the requirements of sustainable development. Furthermore, with continuous technological advancements and improvements, the quality and efficiency of waste fiber recycling and granulation are constantly improving, and its application scope is becoming increasingly wide.

[0004] In recent years, with the continuous improvement of environmental regulations and the constant raising of environmental standards, the demand for the practice of the "green production" concept in the manufacturing sector has become increasingly urgent. Traditional recycling granulation processes, due to outdated equipment technology and inefficient production processes, generally suffer from environmental problems such as excessive emissions of waste smoke, incomplete waste gas treatment, and severe dust pollution. This pollution not only causes continuous damage to the surrounding ecological environment but also directly threatens the occupational health and safety of on-site operators. Furthermore, traditional processes also face technical bottlenecks such as low raw material utilization, high energy consumption, and large fluctuations in product quality, making them difficult to adapt to the development needs of modern intelligent manufacturing and refined management. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention proposes an environmentally friendly waste filament recycling and granulation process.

[0006] The technical solution adopted in this invention is an environmentally friendly waste filament recycling and granulation process, comprising the following steps: Step 1: Raw material pretreatment. The recycled waste filaments are fed into a coarse powder crusher for initial crushing, and then conveyed by a belt conveyor to a fine powder crusher for grinding. The particle size of the material is controlled to be <1mm to obtain uniform fine powder raw material. The fine powder raw material is quantitatively fed to the granulation host through a screw feeding system. Step 2: Friction granulation. After the fine powder raw material enters the granulation host, it is softened and shaped by the heat generated by the extrusion and friction between the high-speed rotating grinding disc and the material. Step 3: Post-forming processing. The dense material output from the pelletizing host is conveyed to the pelletizer by the feeding fan and cut into standard pellets. The cut pellets are conveyed to the bag feeding stage by the feeding fan and the discharge pipe. The loose material is simultaneously connected to the dust recovery system for closed-loop recycling. The raw material conveying process adopts a fully enclosed pneumatic conveying system and is equipped with a dust recovery system. The dust emitted during the production process is captured in real time by the dust recovery system, and the collected dust is returned to the screw feeding system for recycling. The trace oil mist generated during the friction process is purified by an oil fume purification system equipped with a plate-type electrostatic oil removal device. During the feeding process, any loose materials are simultaneously fed into a closed-loop dust recovery system for recycling.

[0007] Preferably, the dust recovery system includes a recovery pipe, a cyclone separator connected in series at one end of the recovery pipe, a bag filter connected to the outlet of the cyclone separator, and an exhaust fan connected to the bag filter. An anti-aspiration device is provided on the inner wall of the end of the recovery pipe away from the cyclone separator to reduce the accidental aspiration of raw materials. The recovery pipe is rectangular in shape.

[0008] Preferably, the anti-aspiration device is configured as a plurality of partitions fixedly connected to the inner walls on both sides of the recovery tube. The partitions on the inner walls on both sides of the recovery tube are spaced apart and are inclined at an angle of 60 degrees. The distance between the end of the partition away from the inner wall of the recovery tube and the inner wall on the same side of the recovery tube is half the distance between the inner walls on both sides of the recovery tube.

[0009] Preferably, an arc plate is fixedly connected to the lower surface of the partition, with the concave surface of the arc plate facing the center of the pipe and the convex surface of the arc plate being spaced apart from the inner wall of the pipe.

[0010] Preferably, a plurality of through holes are evenly spaced on the partition plate, the through holes are vertically opened and located on one side of the concave surface of the arc plate, a plurality of connecting holes are opened on the partition plate, the axis of the connecting holes is perpendicular to the surface of the partition plate and the connecting holes are located on one side of the convex surface of the arc plate, and a plurality of vent holes are evenly spaced on the arc plate.

[0011] Preferably, the bag filter includes a housing, a dust collection hopper located at the bottom of the housing, an air inlet on the side wall of the housing, an air outlet at the top of the housing, a mounting plate fixedly connected to the inner walls of both sides of the housing, mounting holes on the mounting plates, a filter bag frame mounted on the inner wall of the mounting holes, dust collection filter bags mounted on the outer wall of the filter bag frames, and a backflushing mechanism mounted on the housing for backflushing and shaking off dust from the dust collection filter bags.

[0012] Preferably, the filter bag frame includes an upper mounting ring and a lower mounting ring, and a plurality of connecting rods are fixedly connected between the upper mounting ring and the lower mounting ring. The plurality of connecting rods are evenly spaced along the outer wall of the upper mounting ring. A plurality of connecting balls are provided between the upper mounting ring and the lower mounting ring, and the connecting balls and the connecting rods are connected by connecting springs. The connecting balls are suspended between the connecting rods under the connecting action of the connecting springs.

[0013] Preferably, a number of fixing rods are fixedly connected between the inner walls on both sides of the housing, and a number of fixing rings are fixedly connected to the fixing rods. The lower mounting ring is installed on the inner wall of the fixing ring, and the outer wall of the lower mounting ring and the inner wall of the fixing ring are connected by a number of buffer springs. The number of buffer springs are evenly spaced along the circumference of the inner wall of the fixing ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through raw material pretreatment, friction granulation, and post-molding treatment, the raw material conveying process adopts a fully enclosed pneumatic conveying system with a dust recovery system. Dust emitted during the production process is captured in real time by the dust recovery system, and the collected dust is recycled back to the screw feeding system for reuse. The trace oil mist generated during the friction process is purified by an oil fume purification system equipped with a plate electrostatic oil removal device. Escaped materials during the feeding process are simultaneously connected to the dust recovery system for closed-loop recycling. Through this setup, the generation of dust in the workshop is reduced, environmental pollution is reduced, and raw material loss is reduced. 2. The static baffles, installed at a 60-degree angle, act as a barrier and guide for the material flow. The baffles extend to half the width of the pipe and are arranged in an alternating pattern. This prevents the pipe from being completely blocked, thus avoiding airflow obstruction, while also preventing larger finished particles from being accidentally sucked into the dust collection system by negative pressure. Only dust is allowed to pass through, effectively preventing finished particles from being drawn away and causing product loss. The dynamic airflow carries dust around the baffles and transports it backward, ensuring that dust collection operations are not disturbed, achieving both the effect of preventing accidental suction and dust flow. 3. When the airflow moves between the misaligned baffles, a vortex is formed between two adjacent baffles on the same side of the recovery pipe. The vortex causes dust to stagnate between the two baffles. When the airflow is blown through the through hole towards the vortex between the two adjacent baffles, it can disperse the vortex and affect it, reducing the probability of dust stagnation in the space between the two baffles. The airflow blocked by the baffles passes through the arc plate and then enters the space between the arc plate and the inner wall of the recovery pipe through the vent. Then it is blown through the connecting hole towards the space between the two baffles, which can further affect the vortex between the two baffles and further reduce the probability of dust stagnation in the space between the two baffles. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein: Figure 1 This is a process flow diagram from an embodiment of this application; Figure 2 This is a structural flowchart of the dust recovery system in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the recovery tube in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the bag filter in the embodiments of this application; Figure 5 This is a schematic diagram of the filter bag frame in an embodiment of this application.

[0016] 1. Dust recovery system; 2. Recovery pipe; 3. Cyclone separator; 4. Baghouse dust collector; 5. Exhaust fan; 6. Partition plate; 7. Arc plate; 8. Through hole; 9. Connection hole; 10. Vent hole; 11. Housing; 12. Dust collection hopper; 13. Air inlet; 14. Air outlet; 15. Mounting plate; 16. Mounting hole; 17. Filter bag frame; 18. Dust collector filter bag; 19. Backflushing mechanism; 20. Upper mounting ring; 21. Lower mounting ring; 22. Connecting rod; 23. Connecting ball; 24. Connecting spring; 25. Fixing rod; 26. Fixing ring; 27. Buffer spring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] This embodiment discloses an environmentally friendly waste fiber recycling and granulation process, such as... Figure 1 As shown, it includes the following steps: Step 1: Raw material pretreatment. In this embodiment, recycled chemical fiber waste from the textile industry is selected as the raw material. In actual production, the operator feeds the batch of recycled chemical fiber waste into the coarse powder crusher. The coarse powder crusher starts running, and the high-speed rotating crushing teeth inside continuously impact and shear the input waste material, completing the initial crushing. The waste material is crushed into relatively large pieces. After the initial crushing, the pieces fall continuously onto the belt conveyor below under the drive force of the equipment's own discharge. The belt conveyor continues to operate, carrying... The coarsely crushed material is stably conveyed to the feed inlet of the fine powder pulverizer. After entering the fine powder pulverizer, the material is continuously ground and pulverized by the high-speed rotating grinding components inside the fine powder pulverizer. The operator cooperates with the screening and testing on site to continuously adjust the grinding speed of the fine powder pulverizer, so that the particle size of the ground material is controlled to be less than 1mm, and a fine powder raw material with uniform particle size is obtained. The ground fine powder raw material falls into the hopper of the screw feeding system. The screw inside the screw feeding system rotates continuously at a uniform speed, and the screw propulsion action of the screw quantitatively and continuously conveys the fine powder raw material to the feed end of the granulation host. In this step, large pieces of waste filament are first broken down and crushed by a coarse powder crusher, and then finely ground by a fine powder crusher to obtain fine powder with a particle size of less than 1 mm. The static equipment cavity provides a closed processing space for material crushing and grinding, while the dynamically operating crushing and grinding components continuously apply mechanical force to the waste filament. This process can process the waste filament, which is irregular in shape and has large size differences, into fine powder raw materials with uniform particle size, providing stable feeding conditions for the subsequent friction granulation process, avoiding large-sized materials from entering the granulation host and causing blockage, and ensuring that the subsequent granulation process can be carried out stably and continuously.

[0019] Step two, friction granulation: After the fine powder raw material is continuously fed into the granulation machine, the high-speed rotating grinding disc inside the granulation machine continues to operate. The high-speed rotating grinding disc constantly compresses and rubs against the fed fine powder material. The continuous friction between the material and the grinding disc, and between the material particles themselves, generates a large amount of heat. Under the action of frictional heat generation, the fine powder material is gradually heated, softened, and shaped. The operator adjusts the speed of the machine by monitoring the operating current and discharge status. After friction softening and shaping, dense strip-shaped material is obtained and continuously discharged from the discharge end of the granulation machine. In this process, the high-speed rotating grinding disc continuously moves relative to the material, and the material is self-heated and softened by mechanical friction. There is no need to set up a large number of external heating sources. It can realize the shaping and granulation of waste filament material, maximize the conversion and utilization of the input waste filament fine powder, reduce the direct loss of unprocessed raw materials, and meet the environmental protection production requirements of waste filament recycling.

[0020] Step 3. Post-forming processing: The dense strip-shaped material discharged from the pelletizing host is continuously conveyed to the pelletizer by the power of the feeding fan. Inside the pelletizer, the high-speed rotating cutting blades continuously cut the continuously fed dense strip-shaped material into standard particles of uniform size. After cutting, the standard particles continue to be conveyed by the feeding fan and the discharge pipe, and finally delivered to the packaging platform for subsequent packaging operations. During the entire material conveying and discharge process, the airflow inside the equipment is continuous. A small amount of fine particles and dust will escape from the equipment connection gaps and the discharge position. The escaped material is simultaneously connected to the dust recovery system 1 to achieve closed-loop recycling. The entire process of raw material conveying adopts a fully enclosed wind-powered conveying mode, and is equipped with a dust recovery system 1. The dust that escapes during the production process is captured in real time by the dust recovery system 1. After being captured, the recovered dust is returned to the screw feeding system, mixed with new fine powder raw materials, and then re-enters the pelletizing process for recycling. During the friction granulation process, the material is heated and releases trace amounts of oil mist. This oily fumes enter the oil fume purification system, and the treated clean gas is then discharged. In this step, the enclosed pneumatic conveying system prevents large amounts of dust from spreading unorganized into the production workshop, improving the working environment. Furthermore, the collected dust is recycled and reused, preventing raw material waste. Simultaneously, the oil fume purification system dynamically captures oil mist in the airflow, purifying the oil mist generated during granulation and preventing direct discharge that could cause air pollution. This achieves synergistic treatment of waste gas and dust, enhancing the overall environmental performance of the process.

[0021] like Figures 2-5 As shown, the dust recovery system 1 is used to collect dust emitted from various stations in the granulation process, realizing dust collection, purification, and material recycling. The dust recovery system 1 includes a recovery pipe 2, a cyclone separator 3, a bag filter 4, an exhaust fan 5, and an anti-aspiration device. The recovery pipe 2 is arranged in a rectangular structure, with one end connected to each dust-generating point and the other end connected in series with the cyclone separator 3. The outlet of the cyclone separator 3 is connected to the bag filter 4, and the exhaust fan 5 is installed at the outlet of the bag filter 4. At the same time, an anti-aspiration device is installed on the inner wall of the end of the recovery pipe 2 away from the cyclone separator 3 to reduce the probability of raw materials being aspirated. When the entire system is working, the exhaust fan 5 provides negative pressure suction. Dust that escapes from the production site first enters the recovery pipe 2 with the airflow, and then flows through the cyclone separator 3 and the bag filter 4 in sequence to complete the graded dust removal and purification. The purified gas is discharged by the exhaust fan 5, and the collected dust material is returned to the screw feeding system for recycling. The system achieves active dust collection and the entire device realizes closed-loop dust treatment, which not only reduces dust leakage and environmental pollution, but also recovers fine raw materials and reduces material loss.

[0022] like Figures 2-5As shown, the anti-aspiration device consists of multiple baffles 6, which are fixedly installed on the inner walls of both sides of the rectangular recovery pipe 2. The baffles 6 on both sides are arranged alternately, and each baffle 6 is inclined. The angle between the baffle 6 and the horizontal plane is 60°. The distance from the end of the baffle 6 away from the inner wall of the recovery pipe 2 to the inner wall on the same side of the recovery pipe 2 is equal to half the distance between the inner walls on both sides of the recovery pipe 2. When the mixed airflow carrying dust and large particles flows toward the cyclone separator 3, the negative pressure airflow generated by the exhaust fan 5 flows inside the pipe. The airflow carries the material and impacts the lower surface of the static inclined baffle 6. The large particles of finished material are blocked by the inclined baffle 6 and slide down under the action of gravity, falling back into the production pipeline. The lighter dust particles can continue to flow backward with the airflow through the gaps between the baffles 6 and enter the rear cyclone separator 3. The static baffle 6, installed at a 60° angle, acts as a barrier and guide for the material flow. The baffle 6 extends to half the width of the pipe and is arranged in an alternating pattern. This prevents the pipe from being completely blocked, thus avoiding airflow obstruction, while also preventing larger finished particles from being accidentally sucked into the dust collection system by negative pressure. Only dust is allowed to pass through, effectively preventing finished particles from being drawn away and causing product loss. The dynamically flowing airflow carries dust around the baffle 6 and transports it backward, ensuring that the dust collection operation is not disturbed, thus achieving the dual effect of preventing accidental suction and ensuring dust flow.

[0023] like Figures 2-5 As shown, each partition 6 is also fixedly fitted with an arc plate 7 on its lower surface. The concave surface of the arc plate 7 faces the center of the recovery pipe 2. A gap is reserved between the convex surface of the arc plate 7 and the inner wall of the recovery pipe 2. Several vertically arranged through holes 8 are evenly spaced on the partition 6. The through holes 8 are located on one side of the concave surface of the arc plate 7. Several connecting holes 9 are also provided on the partition 6. The axis of the connecting holes 9 is perpendicular to the surface of the partition 6. The connecting holes 9 are located on one side of the convex surface of the arc plate 7. Several ventilation holes 10 are evenly spaced on the body of the arc plate 7. When the airflow moves between the staggered partitions 6, two adjacent partitions 6 on the same side of the recovery pipe 2 A vortex is formed between the two partitions 6, which causes dust to stagnate between them. When the airflow blows through the through hole 8 onto the vortex between the two adjacent partitions 6, it can disperse the vortex and affect it, reducing the probability of dust stagnation in the space between the two partitions 6. The airflow blocked by the partition 6 passes through the arc plate 7 and then enters the space between the arc plate 7 and the inner wall of the recovery pipe 2 through the vent hole 10. Then it is blown into the space between the two partitions 6 through the connecting hole 9, which can further affect the vortex between the two partitions 6 and further reduce the probability of dust stagnation in the space between the two partitions 6.

[0024] like Figures 2-5As shown, the bag filter 4 mainly includes a housing 11, a dust collection hopper 12, an air inlet 13, an air outlet 14, a mounting plate 15, a filter bag frame 17, a dust collection filter bag 18, and a backflushing mechanism 19. The dust collection hopper 12 is located at the bottom of the housing 11. The side wall of the housing 11 has an air inlet 13, and the top of the housing 11 has an air outlet 14. The mounting plate 15 is fixedly installed on the inner walls of both sides of the housing 11. The mounting plate 15 has mounting holes 16. The filter bag frame 17 is assembled inside the mounting holes 16, and the dust collection filter bag 18 is fitted on the outer wall of the filter bag frame 17. The housing 11 is equipped with a backflushing mechanism 19 that can perform backflushing and dust shaking operations on the dust collection filter bag 18. Dust-laden airflow enters the housing 11 through the air inlet 13 and flows upward. The static dust filter bag 18 blocks dust particles, which are trapped on the outer surface of the dust filter bag 18. The clean gas after filtration passes through the filter bag and flows out through the upper air outlet 14. As the equipment continues to operate, the dust adhering to the outer surface of the filter bag continues to increase. At this time, the dynamically operating backflushing mechanism 19 intermittently sprays high-pressure airflow. The high-pressure airflow rushes back into the dust filter bag 18, causing the dust filter bag 18 to shake. The dust adhering to the outer surface of the filter bag falls off under the action of shaking and falls downward into the bottom dust collection hopper 12 for collection. The static housing 11 provides a sealed cavity for filtration and dust removal. The filter bag frame 17 statically supports the dust removal filter bag 18 to maintain the shape of the filter bag and prevent the filter bag from being sucked down and failing due to negative pressure. The dynamic dust-laden airflow completes the filtration and separation. The dynamic backflushing mechanism 19 provides pulse backflushing airflow to realize automatic dust removal of the filter bag without stopping the machine for disassembly and cleaning, ensuring that the bag dust collector 4 can carry out dust removal operations continuously and without interruption, and maintain stable dust removal efficiency.

[0025] like Figures 2-5As shown, the filter bag frame 17 consists of an upper mounting ring 20, a lower mounting ring 21, connecting rods 22, connecting balls 23, and connecting springs 24. Multiple connecting rods 22 are evenly arranged circumferentially and fixedly connected between the upper mounting ring 20 and the lower mounting ring 21. Several connecting balls 23 are arranged between the connecting rods 22. The connecting balls 23 are connected to the connecting rods 22 through the connecting springs 24. Under the action of the connecting springs 24, the connecting balls 23 are suspended and distributed between the connecting rods 22. The dust collector filter bag 18 is fitted onto the outside of the filter bag frame 17. During equipment exhaust operation, the negative pressure causes the dust collector filter bag 18 to tend to contract inward. When the backflushing mechanism 19 performs backflushing, the high-pressure airflow impacts the dust collector filter bag 18, causing the filter bag to reciprocate and deform. The inner wall of the filter bag will collide with the suspended connecting ball 23. The dynamic deformation of the filter bag will squeeze and impact the connecting ball 23. After being impacted, the connecting ball 23 pulls the connecting spring 24 and swings back and forth. The swinging connecting ball 23 further strikes the inner wall of the dust collector filter bag 18, increasing the vibration amplitude of the dust collector filter bag 18. Compared with the traditional rigid filter bag frame 17, this structure amplifies the shaking effect of the filter bag by using the dynamically swinging connecting ball 23, which can shake off the dust with strong adhesion to the surface of the filter bag, improve the backflushing cleaning effect, reduce the risk of filter bag clogging, and ensure the long-term dust collection capacity of the bag filter 4.

[0026] like Figures 2-5 As shown, several fixing rods 25 are fixedly mounted between the inner walls of both sides of the housing 11. Multiple fixing rings 26 are mounted on the fixing rods 25. The lower mounting ring 21 of the filter bag frame 17 is placed inside the fixing ring 26. Multiple sets of buffer springs 27 are evenly distributed circumferentially between the outer wall of the lower mounting ring 21 and the inner wall of the fixing ring 26. The filter bag frame 17 is positioned and placed by the fixing rings 26. The static fixing rods 25 and fixing rings 26 provide a mounting base for the filter bag frame 17. When the backflushing mechanism 19 performs pulse backflushing, the high-pressure airflow impacts the filter bag and the filter bag frame 17, causing the filter bag frame 17 to vibrate. The vibration is transmitted to the lower mounting ring 21, and the dynamically vibrating lower mounting ring 21 compresses the surrounding buffer springs 27, causing the buffer springs 27 to undergo repeated compression and rebound deformation. On the one hand, the buffer spring 27 can absorb the vibration and impact generated by the filter bag frame 17, reduce the vibration directly transmitted to the housing 11, and reduce the overall vibration and operating noise of the housing 11; on the other hand, the reciprocating extension and retraction of the spring will cause the lower mounting ring 21 to sway back and forth slightly, further causing the entire filter bag frame 17 to generate slight vibration, assisting the dust collector filter bag 18 to shake off the accumulated dust. At the same time, the spring can also compensate for assembly tolerances and alleviate equipment discomfort.

[0027] In the description of this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0028] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In the description of this specification, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. An environment-friendly waste silk regenerative granulation process, characterized in that, Includes the following steps: Step 1: Raw material pretreatment. The recycled waste filaments are fed into a coarse powder crusher for initial crushing, and then conveyed by a belt conveyor to a fine powder crusher for grinding. The particle size of the material is controlled to be <1mm to obtain uniform fine powder raw material. The fine powder raw material is quantitatively fed to the granulation host through a screw feeding system. Step 2: Friction granulation. After the fine powder raw material enters the granulation host, it is softened and shaped by the heat generated by the extrusion and friction between the high-speed rotating grinding disc and the material. Step 3: Post-forming processing: The dense material output by the pelletizing host is conveyed to the pelletizer by the feeding fan and cut into standard granules; the cut granules are conveyed to the packaging platform by the feeding fan and the discharge pipe, and the loose material is simultaneously connected to the dust recovery system (1) closed-loop recovery. The raw material conveying process adopts a fully enclosed wind power conveying system and is equipped with a dust recovery system (1). The dust emitted during the production process is captured in real time by the dust recovery system (1), and the collected dust is returned to the screw feeding system for recycling. The trace oil mist generated during the friction process is purified by an oil fume purification system equipped with a plate-type electrostatic oil removal device. During the feeding process, the loose materials are simultaneously fed into the dust recovery system (1) for closed-loop recovery.

2. The environmentally friendly waste filament recycling and granulation process according to claim 1, characterized in that, The dust recovery system (1) includes a recovery pipe (2), a cyclone separator (3) connected in series at one end of the recovery pipe (2), a bag filter (4) connected to the outlet of the cyclone separator (3), and a blower (5) connected to the bag filter (4). An anti-aspiration device is provided on the inner wall of the end of the recovery pipe (2) away from the cyclone separator (3) to reduce the aspiration of raw materials. The recovery pipe (2) is rectangular.

3. The environmentally friendly waste filament recycling and granulation process according to claim 2, characterized in that, The anti-aspiration device is configured as a number of partitions (6) fixedly connected to the inner walls on both sides of the recovery pipe (2). The partitions (6) on the inner walls on both sides of the recovery pipe (2) are spaced apart and are inclined. The inclination angle of the partitions (6) is 60 degrees. The distance between the end of the partition (6) away from the inner wall of the recovery pipe (2) and the inner wall on the same side of the recovery pipe (2) is half the distance between the inner walls on both sides of the recovery pipe (2).

4. The environmentally friendly waste fiber recycling and granulation process according to claim 3, characterized in that, An arc plate (7) is fixedly connected to the lower surface of the partition (6). The concave surface of the arc plate (7) faces the center of the pipe, and the convex surface of the arc plate (7) is spaced from the inner wall of the pipe.

5. The environmentally friendly waste filament recycling and granulation process according to claim 4, characterized in that, A number of through holes (8) are evenly spaced on the partition plate (6). The through holes (8) are vertically opened and located on one side of the concave surface of the arc plate (7). A number of connecting holes (9) are opened on the partition plate (6). The axis of the connecting holes (9) is perpendicular to the surface of the partition plate (6). The connecting holes (9) are located on one side of the convex surface of the arc plate (7). A number of ventilation holes (10) are evenly spaced on the arc plate (7).

6. The environmentally friendly waste filament recycling and granulation process according to claim 2, characterized in that, The bag filter (4) includes a housing (11), a dust collection hopper (12) located below the housing (11), an air inlet (13) located on the side wall of the housing (11), an air outlet (14) located at the upper end of the housing (11), a mounting plate (15) fixedly connected to the inner walls on both sides of the housing (11), a mounting hole (16) opened on the mounting plate (15), a filter bag frame (17) installed on the inner wall of the mounting hole (16), a dust removal filter bag (18) located on the outer wall of the filter bag frame (17), and a backflushing mechanism (19) located on the housing (11) for backflushing and shaking dust off the dust removal filter bag (18).

7. The environmentally friendly waste fiber recycling and granulation process according to claim 6, characterized in that, The filter bag frame (17) includes an upper mounting ring (20) and a lower mounting ring (21). Several connecting rods (22) are fixedly connected between the upper mounting ring (20) and the lower mounting ring (21). The several connecting rods (22) are evenly spaced along the outer wall of the upper mounting ring (20). Several connecting balls (23) are provided between the upper mounting ring (20) and the lower mounting ring (21). The connecting balls (23) and the connecting rods (22) are connected by connecting springs (24). The connecting balls (23) are suspended between the connecting rods (22) under the connecting action of the connecting springs (24).

8. The environmentally friendly waste fiber recycling and granulation process according to claim 7, characterized in that, Several fixing rods (25) are fixedly connected between the inner walls on both sides of the box (11). Several fixing rings (26) are fixedly connected on the fixing rods (25). The lower mounting ring (21) is installed on the inner wall of the fixing ring (26). Several buffer springs (27) are connected between the outer wall of the lower mounting ring (21) and the inner wall of the fixing ring (26). The several buffer springs (27) are evenly spaced along the circumference of the inner wall of the fixing ring (26).

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