A high efficiency shredding and recycling device for woven bags

Abstract

The application discloses a kind of high-efficiency broken recycling device for woven bag, including wet anti-winding crusher, spraying mechanism and float washing separation mechanism;Wet anti-winding crusher includes shell, upper cover, moving knife unit and fixed knife unit, moving knife unit includes rotating shaft, multiple broken disc and push flow vane, fixed knife unit is equipped with comb tooth shape stripping knife and elastic pre-tightening piece;Spraying mechanism includes feed pre-wetting unit, broken area water curtain unit and cavity wall self-cleaning unit;Float washing separation mechanism is communicated with the discharge port of crusher, including separation cylinder, heavy conveying unit, light conveying unit and blowing unit, material enters separation cylinder in tangential mode.The application is integrated by wet crushing and hydraulic separation, three-layer wet protection system is formed in crushing cavity, simultaneously solve the technical problems of fiber winding knife roll, serious dust pollution and difficult separation of light debris in woven bag recycling process, with the advantages of short processing flow, stable operation, high recovery material cleanliness.

Description

Technical Field

[0001] This invention belongs to the field of woven bag recycling technology, specifically relating to a high-efficiency crushing and recycling device for woven bags. Background Technology

[0002] Woven bags are widely used for product packaging in industries such as chemicals, building materials, and agriculture, resulting in a large number of waste woven bags after use. The recycling and reuse of waste woven bags usually requires processes such as crushing, washing, and separation.

[0003] In existing technologies, woven bag crushing mostly adopts dry mechanical crushing methods, which have the following prominent problems: Woven bags are woven from polypropylene or polyethylene flat yarns, which have high toughness and strong fiber structure. On high-speed rotating cutter rollers, fibers are prone to entanglement, causing equipment jamming or even motor burnout; Dry crushing generates a large amount of dust, which seriously pollutes the working environment and endangers the health of operators; The crushed lightweight plastic fragments are mixed with impurities such as mud and sand, and during subsequent hydraulic washing, the lightweight fragments tend to float on the water surface, making solid-liquid separation difficult and recycling efficiency low.

[0004] Therefore, in response to the above-mentioned technical problems, it is necessary to provide a high-efficiency crushing and recycling device that can simultaneously solve the problems of fiber entanglement, dust pollution and impurity separation during the crushing process.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency crushing and recycling device for woven bags, which can simultaneously solve the technical problems of fiber entanglement in the cutting roller, serious dust pollution, and difficulty in separating lightweight debris in existing devices through the integrated design of wet crushing and hydraulic separation.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution: A high-efficiency crushing and recycling device for woven bags includes a wet anti-winding crusher, a spraying mechanism, and a flotation separation mechanism. The wet anti-winding crusher includes a shell, an upper cover attached to the shell, a moving blade unit, and a fixed blade unit. A crushing chamber is formed between the shell and the upper cover. The moving blade unit is rotatably disposed within the crushing chamber, and the fixed blade unit is disposed on the inner wall of the shell and cooperates with the moving blade unit. The moving blade unit includes a rotating shaft rotatably connected to two side walls along the length of the shell, a plurality of crushing discs fixedly fixed along the rotating shaft at axial intervals, and crushing discs disposed on adjacent crushing discs. The pusher blades between the crushing discs are used to push the material-water mixture in the crushing chamber axially toward the discharge port when the moving blade unit rotates; the fixed blade unit is used to peel off the fibers wrapped around the moving blade unit when the moving blade unit rotates; the spraying mechanism includes a feed pre-wetting unit, a crushing zone water curtain unit, and a chamber wall self-cleaning unit, used to spray water medium into the crushing chamber and the feed area; the flotation separation mechanism is connected to the discharge port of the wet anti-winding crusher to receive the debris-water mixture and realize the hydraulic separation of light plastic debris and heavy impurities.

[0008] In one or more embodiments of the present invention, the pusher blades are arranged in a spiral on the rotating shaft, and the spiral angle gradually decreases from the feed end to the discharge end, so as to apply an increasing axial pushing force to the material; the outer edge of the crushing disc is provided with a serrated or hook-shaped cutting edge for tearing and shearing the wetted woven bag.

[0009] In one or more embodiments of the present invention, the moving blade unit includes a pair of blade holders, a pair of first comb-shaped stripping blades, and a plurality of second comb-shaped stripping blades. The pair of blade holders are respectively disposed on the inner sidewalls of the two sidewalls along the length direction of the housing. The pair of first comb-shaped stripping blades are respectively fixedly connected to the pair of blade holders along the length direction, and their serrations correspond to the serration gap of the crushing disc, for stripping fibers wrapped around the crushing disc. The plurality of second comb-shaped stripping blades are respectively fixedly connected to the pair of blade holders in a vertical and equally spaced manner, and are sequentially disposed between adjacent crushing discs and pusher blades, for stripping fibers wrapped between the rotating shaft, the crushing disc, and the pusher blades.

[0010] In one or more embodiments of the present invention, the fixed blade unit further includes a pair of elastic preload members, each comprising a plurality of guide rods, a plurality of compression springs, a plurality of fixed seats, and a pair of elastic protective strips; one end of each of the plurality of guide rods is fixedly connected to the side wall of the blade holder, and the other end is disposed on the outside of the housing in a through and slidable manner; the plurality of compression springs are respectively sleeved on the side wall of the outer side of the housing where the plurality of guide rods are disposed; the plurality of fixed seats are respectively fixedly connected to the outer side wall of the housing, and one end of each compression spring is fixedly connected to the inner side wall of the fixed seat; the pair of elastic protective strips are respectively fixedly connected between the upper and lower side walls of the blade holder and the inner side wall of the housing.

[0011] In one or more embodiments of the present invention, a feed inlet is provided at one end of the upper cover, and a feed pipe is fixedly connected to the feed inlet; a feeding roller is rotatably connected to the side wall of the housing at the lower end of the feed inlet, and a plurality of feeding rods are fixedly connected to the feeding roller, and the plurality of feeding rods are arranged in an alternating manner; a drive motor is connected to one end of the rotating shaft, and a drive belt is provided between the rotating shaft and the feeding roller.

[0012] In one or more embodiments of the present invention, the bottom wall panel of the housing is provided with a discharge port at the end away from the feed inlet, a discharge pipe is fixedly connected to the bottom of the discharge port, and a discharge grate is detachably provided on the discharge port; a pair of buffer plates are fixedly connected to the inner side wall of the discharge pipe, and the pair of buffer plates are arranged in an alternating manner and inclined downward.

[0013] In one or more embodiments of the present invention, the feeding pre-wetting unit includes an annular liquid delivery pipe fixedly connected to the inner side wall of the feed port on the upper cover. The annular liquid delivery pipe is disposed above the feeding roller. Multiple wide-angle fan-shaped nozzles are equally spaced along the circumference on the inner annular wall of the annular liquid delivery pipe. The multiple wide-angle fan-shaped nozzles are all arranged in a manner that is inclined downward toward one side of the central axis of the annular liquid delivery pipe.

[0014] In one or more embodiments of the present invention, the water curtain unit of the crushing zone includes a plurality of arc-shaped infusion pipes fixedly connected to the bottom of the upper cover, the plurality of arc-shaped infusion pipes being arranged sequentially along the length direction of the upper cover; a plurality of high-pressure micro-mist nozzles are provided at equal intervals at the bottom of the arc-shaped infusion pipes; a high-pressure inlet pipe is fixedly connected to the inlet of the arc-shaped infusion pipe, the upper end of the high-pressure inlet pipe passing through the upper cover and placed outside it; the self-cleaning unit of the cavity wall includes a pair of cleaning fluid delivery pipes respectively arranged along the length direction at the connection between the shell and the upper cover, the pair of cleaning fluid delivery pipes having a plurality of atomizing nozzles provided in a manner of spraying towards the connection between the shell and the upper cover, a cleaning fluid delivery pipe is fixedly connected to the inlet of the cleaning fluid delivery pipe, one end of the cleaning fluid delivery pipe passing through the side wall of the shell and placed outside it.

[0015] In one or more embodiments of the present invention, the flotation separation mechanism includes a separation cylinder, a heavy material conveying unit, a light material conveying unit, an air blowing unit, and an exhaust system. The separation cylinder is fixedly connected to the bottom of the discharge pipe, and the discharge pipe conveys the material into the separation cylinder in a straight or tangential manner. The heavy material conveying unit is disposed at the bottom of the separation cylinder. The light material conveying unit is disposed on the upper side wall of the separation cylinder. The air blowing unit is disposed on the lower side wall of the separation cylinder. The exhaust port is opened on the top wall plate of the separation cylinder.

[0016] In one or more embodiments of the present invention, the heavy material conveying unit includes a drive shaft rotatably disposed at the bottom outlet of the separation cylinder, and a spiral blade is fixedly connected to the side wall of the drive shaft; the air blowing unit includes an annular air distribution pipe fixedly connected to the outer side wall of the separation cylinder and near the lower side, and a plurality of air nozzles are equally spaced along the circumference on the annular air distribution pipe, and the air outlet of the air nozzles passes through the side wall of the separation cylinder and is placed inside the separation cylinder; the light material conveying unit includes an overflow port opened on the side wall of the separation cylinder and near the upper side, and an overflow pipe is fixedly connected to the outer side wall of the overflow port.

[0017] Compared with existing technologies, this invention integrates the spraying mechanism into the crusher, forming a three-layer wet protection system within the crushing chamber: pre-wetting, water curtain dust suppression, and chamber wall self-cleaning. This allows the woven bags to be crushed while immersed in water, eliminating the dust problem inherent in dry crushing. Simultaneously, the water medium reduces fiber toughness, decreasing the tendency of long fibers to entangle with the cutter rollers. The fixed-blade unit, through a combination of comb-shaped peeling blades and elastic pre-tightening components, achieves real-time self-cleaning of the moving-blade unit. When fibers become entangled, they are peeled off by the comb teeth and washed away by the water flow. When encountering hard foreign objects, the elasticity protects the blades, fundamentally solving the technical problem of high-toughness fibers becoming entangled and stuck. The flotation separation mechanism is directly connected to the crusher. The mixture of debris and water enters the separation cylinder tangentially. Under the combined action of the swirling force field and the release of bubbles from the bottom air blowing unit, lightweight plastic debris floats to the surface and is discharged through the overflow pipe, while heavy impurities settle and are discharged through the bottom spiral. This cleverly utilizes the buoyancy characteristics of lightweight debris in water, transforming the disadvantage of "lightweight floating and difficult separation" in traditional processes into the advantage of "lightweight floating and easy separation" in this solution. The entire machine integrates crushing, dust removal, anti-entanglement, and separation, resulting in a short processing flow, stable operation, and high cleanliness of the recovered material. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of a high-efficiency crushing and recycling device for woven bags according to an embodiment of the present invention; Figure 2 This is a perspective view of a high-efficiency crushing and recycling device for woven bags according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a high-efficiency crushing and recycling device for woven bags according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of a high-efficiency crushing and recycling device for woven bags according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal components of the housing in this invention; Figure 6 This is a cross-sectional view of the spray unit in this invention; Figure 7 For the present invention Figure 3 A schematic diagram at point A in the middle; Figure 8 For the present invention Figure 4 A schematic diagram at point B in the middle; Figure 9 For the present invention Figure 4 A schematic diagram at point C in the middle; Figure 10 For the present invention Figure 6 A schematic diagram at point D in the middle; Figure 11 For the present invention Figure 6 A schematic diagram at point E in the middle; Figure 12 This is a cross-sectional view of the flotation separation mechanism in this invention.

[0020] Explanation of main chart labels: 1-Wet anti-winding crusher, 11-Shell, 12-Crushing chamber, 13-Top cover, 14-Rotating shaft, 15-Crushing disc, 16-Propeller blade, 17-Knife holder, 18-Guide rod, 19-Compression spring, 110-Fixed seat, 111-Elastic protective strip, 112-Feed pipe, 113-Push roller, 114-Push rod, 115-Drive motor, 116-Drive belt, 117-Discharge pipe, 118-Discharge grate, 1 19-Buffer plate, 2-Spraying mechanism, 21-Annular infusion pipe, 22-Wide-angle fan-shaped nozzle, 23-Arc-shaped infusion pipe, 24-High-pressure micro-mist nozzle, 25-High-pressure inlet pipe, 26-Cleaning liquid delivery pipe, 27-Atomizing nozzle, 28-Cleaning liquid inlet pipe, 3-Float washing separation mechanism, 31-Separation cylinder, 32-Drive shaft, 33-Helical blade, 34-Annular air distribution pipe, 35-Air jet nozzle, 36-Overflow pipe, 37-Exhaust port. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0022] like Figures 1 to 4 As shown, an embodiment of the present invention provides a high-efficiency crushing and recycling device for woven bags, comprising a wet anti-winding crusher 1, a spraying mechanism 2, and a flotation separation mechanism 3. The wet anti-winding crusher 1 is used to shred the woven bags into uniform fragments in an aqueous environment. The spraying mechanism 2 is used to spray an aqueous medium into the crushing chamber to achieve wetting, dust suppression, and self-cleaning. The flotation separation mechanism 3 is used to receive the mixture of fragments and water and complete the hydraulic separation of lightweight plastic fragments from heavy impurities.

[0023] like Figures 1 to 4 As shown, the wet anti-winding shredder 1 includes a shell 11, a top cover 13, a moving blade unit, and a fixed blade unit. The shell 11 is a groove-shaped welded structure extending along its length, forming the main load-bearing base of the device. The top cover 13 is attached to the top of the shell 11, with one side hinged to the shell 11 and the other side locked by a quick-release buckle for easy opening and maintenance. A crushing chamber 12 is formed between the shell 11 and the top cover 13. The crushing chamber 12 is a cylindrical or near-cylindrical inner cavity space extending along the length of the shell, where the wetting, shredding, and conveying of woven bags are all completed. The inner walls of both the shell 11 and the top cover 13 can be lined with wear-resistant plates to extend the service life of the equipment. A sealing strip is provided at the joint surface between the top cover 13 and the shell 11 to prevent water from leaking out of the crushing chamber 12.

[0024] like Figures 3 to 5 As shown, the moving blade unit is rotatably mounted within the crushing chamber 12, serving as the core rotating component for the crushing operation. The moving blade unit includes a rotating shaft 14, multiple crushing discs 15, and a pusher fan 16. The rotating shaft 14 is rotatably connected to the two side walls of the housing 11 along its length via bearing seats at both ends. The bearing seats are equipped with a combined sealing structure, including a labyrinth seal sleeve and a skeleton oil seal, to prevent water and debris from leaking outwards from the crushing chamber 12 along the rotating shaft 14. One end of the rotating shaft 14 is connected to the output shaft of a drive motor 115 via a flexible coupling. The drive motor 115 is a geared motor, fixedly mounted on a frame motor base on the feed end side of the housing 11. Multiple crushing discs 15 are fixedly spaced along the axial direction of the rotating shaft 14. Each crushing disc 15 has a disc-shaped or star-shaped wheel structure, with serrated or hook-shaped cutting edges on its outer edge. The cutting edges are composed of detachable blades for easy replacement after wear. The crushing discs 15 impact, tear, and shear the wetted woven bags, crushing them into uniformly sized fragments. The pusher blade 16 is disposed between adjacent crushing discs 15 and fixed to the shaft of the rotating shaft 14. The pusher blade 16 has a helical blade structure, and its outer edge diameter is smaller than that of the outer edge of the crushing disc 15 to avoid interference with the fixed blade unit. When the moving blade unit rotates, the pusher blade 16 pushes the material and water mixture in the crushing chamber 12 axially towards the discharge port, so that the material is continuously conveyed forward while being crushed. The pusher blade 16 is arranged in a helical pattern on the rotating shaft 14, and its helix angle gradually decreases from the feed end to the discharge end. The large helix angle at the front quickly grabs and pushes the entire woven bag, while the small helix angle at the rear applies a greater axial pushing force and compressive force to the material that has been torn into small pieces, forcing it through the discharge port.

[0025] like Figure 5 , Figure 6 and Figure 11As shown, the fixed blade unit is disposed on the inner wall of the housing 11 and works in conjunction with the moving blade unit to peel off the fibers wrapped around the moving blade unit when the moving blade unit rotates. The fixed blade unit includes a pair of blade holders 17, a pair of first comb-shaped peeling blades, and a plurality of second comb-shaped peeling blades. The pair of blade holders 17 are respectively disposed on the inner sidewalls of the two side wall plates along the length direction of the housing 11, and the main body of the blade holder 17 is a strip-shaped base plate extending along the length direction of the housing 11. The pair of first comb-shaped peeling blades are fixedly connected to the pair of blade holders 17 along the length direction. The first comb-shaped peeling blades extend from the base plate into the inner side of the crushing chamber 12, and their teeth correspond to the tooth gaps of the crushing discs 15. That is, the teeth of the first comb-shaped peeling blades extend into the gaps between adjacent crushing discs 15 one by one, for peeling off the fibers wrapped around the crushing discs 15 when the moving blade unit rotates. Multiple second comb-shaped stripping blades are fixedly connected to a pair of blade holders 17 in a vertical and equally spaced manner. The second comb-shaped stripping blades are arranged perpendicular to the first comb-shaped stripping blades and are arranged at equal intervals in the vertical direction. They are sequentially arranged between adjacent crushing discs 15 and pusher blades 16 to strip fibers wrapped around the area between the rotating shaft 14, the crushing discs 15 and the pusher blades 16.

[0026] like Figure 6 and Figure 11As shown, to ensure that the fixed tool unit can retract and protect the tool when encountering hard foreign objects, the fixed tool unit also includes a pair of elastic preload members. Each pair of elastic preload members corresponds to a pair of tool holders 17 and includes multiple guide rods 18, multiple compression springs 19, multiple fixing seats 110, and a pair of elastic protective strips 111. One end of each guide rod 18 is fixedly connected to the side wall of the tool holder 17, which is the side of the tool holder 17 facing the outside of the housing 11. The other end of the guide rod 18 is placed on the outside of the housing 11 in a through-hole and slidable manner; that is, the side wall of the housing 11 has a through hole for the guide rod 18 to pass through, and the guide rod 18 can slide freely within the through hole along its own axis. Multiple compression springs 19 are respectively sleeved on the side wall of the multiple guide rods 18 placed on the outside of the housing 11; that is, the compression springs 19 are sleeved on the portion of the guide rod 18 extending outside the housing 11. Multiple fixing seats 110 are respectively fixedly connected to the outer side wall of the housing 11. The fixing seat 110 is a sleeve-shaped structure with an inner cavity, which is sleeved on the outside of the guide rod 18 and the compression spring 19. One end of the compression spring 19 is fixedly connected to the inner side wall of the fixing seat 110, and the other end abuts against the spring seat on the guide rod 18 or is directly fixedly connected to the side wall of the guide rod 18. When the tool holder 17 is squeezed by a hard foreign object, the guide rod 18 slides outward to the outside of the housing 11, the compression spring 19 is compressed, and the tool holder 17 elastically retracts. After the foreign object passes, the restoring force of the compression spring 19 causes the guide rod 18 and the tool holder 17 to automatically return to their original positions. A pair of elastic protective strips 111 are fixedly connected between the upper and lower side walls of the cutter holder 17 and the inner side wall of the housing 11. The elastic protective strips 111 are long strip-shaped seals made of rubber or metal corrugated material, used to seal the gap between the cutter holder 17 and the inner side wall of the housing 11, preventing material debris in the crushing chamber 12 from entering the gap and affecting the elastic retraction action of the cutter holder 17.

[0027] like Figures 1 to 4 and Figure 8As shown, one end of the upper cover 13 has a feed inlet for feeding the woven bag material to be crushed into the crushing chamber 12. A feed pipe 112 is fixedly connected to the feed inlet. The feed pipe 112 has a conical or trapezoidal structure that is wider at the top and narrower at the bottom, guiding the material smoothly into the crushing chamber 12. A material-pushing roller 113 is rotatably connected to the side wall of the housing 11 at the lower end of the feed inlet. The material-pushing roller 113 is installed laterally at the junction of the feed inlet and the crushing chamber 12, and its two ends are supported on the side walls of the housing 11 by bearing seats. Multiple material-pushing rods 114 are fixedly connected to the material-pushing roller 113. The multiple material-pushing rods 114 are arranged in an alternating manner, that is, they are staggered along the axial and circumferential directions of the material-pushing roller 113 to ensure uniform gripping and forced feeding of the loose woven bag material. One end of the rotating shaft 14 is connected to a drive motor 115. A drive belt 116 is provided between the rotating shaft 14 and the feeding roller 113. The drive belt 116 can be a chain or a synchronous belt, so that the feeding roller 113 is driven by the same drive motor 115, or it can be driven by an independent motor and its rotation direction is controlled separately. The rotation direction of the feeding roller 113 is opposite to that of the rotating shaft 14 and inward, forcibly pressing the material into the crushing zone and preventing the material from bridging at the feed inlet.

[0028] like Figure 7 and Figure 9 As shown, the bottom wall panel of the shell 11 has a discharge port at the end furthest from the feed inlet for discharging the crushed debris and water mixture. A discharge pipe 117 is fixedly connected to the bottom of the discharge port. The discharge pipe 117 is a vertical tubular structure extending from top to bottom, guiding the crushed slurry to the downstream flotation and separation mechanism 3. A detachable discharge grate 118 is installed on the discharge port. The discharge grate 118 is an arc-shaped or flat screen plate with several regularly arranged screen holes. The screen hole diameter is determined according to the required debris particle size. The discharge grate 118 is installed via slots or bolts, facilitating the replacement of different hole diameter specifications. The debris and water mixture that has been crushed to the qualified particle size in the crushing chamber 12 passes through the screen holes of the discharge grate 118 and is discharged. Larger fragments that do not meet the standard are intercepted and returned to the crushing chamber 12 for further crushing. A pair of buffer plates 119 are fixedly connected to the inner wall of the discharge pipe 117. The pair of buffer plates 119 are arranged in an alternating manner and tilted downwards. That is, the two buffer plates 119 are staggered vertically inside the discharge pipe 117, and each plate is tilted downwards at a certain angle. When the material falls, it impacts the two buffer plates 119 in sequence. After two buffering and energy dissipation, it smoothly enters the flotation separation mechanism 3, avoiding the high-speed slurry from directly impacting the liquid surface inside the separation cylinder 31 and causing disturbance.

[0029] like Figure 4 , Figure 5 and Figure 8As shown, the spraying mechanism 2 includes a feed pre-wetting unit, a crushing zone water curtain unit, and a chamber wall self-cleaning unit, which together constitute a complete wet system from feeding to crushing to chamber wall protection. The feed pre-wetting unit includes an annular liquid delivery pipe 21 fixedly connected to the inner wall of the feed inlet on the upper cover 13. The annular liquid delivery pipe 21 is an annular or square stainless steel pipe that matches the shape of the feed inlet and is located above the feeding roller 113. Multiple wide-angle fan-shaped nozzles 22 are evenly spaced along the circumference on the inner annular wall of the annular liquid delivery pipe 21. The multiple wide-angle fan-shaped nozzles 22 are all arranged in a downward tilting manner towards one side of the central axis of the annular liquid delivery pipe 21, that is, the spray direction of each nozzle is uniformly tilted downward towards the central area of ​​the feed inlet. When the woven bag falls through the feed pipe 112, the fan-shaped water mist sprayed from all sides evenly coats the upper and lower surfaces of the material, pre-wetting it so that the fibers absorb water and soften before entering the crushing zone, reducing their toughness and reducing the generation of tearing dust from the source. At the same time, the water mist particles form the first dust suppression barrier, preventing dust from escaping upwards.

[0030] like Figure 5 , Figure 6 and Figure 10 As shown, the water curtain unit in the crushing zone includes multiple arc-shaped infusion pipes 23 fixedly connected to the bottom of the upper cover 13. These arc-shaped infusion pipes 23 are arranged sequentially along the length of the upper cover 13, i.e., segmented along the axial direction of the crushing chamber 12, covering the entire crushing area. The arc-shaped infusion pipes 23 are curved stainless steel pipes that conform to the arc-shaped inner wall of the upper cover 13, and are fixed to pre-welded stud seats on the inner wall of the upper cover 13 using pipe clamps. Multiple high-pressure micro-mist nozzles 24 are evenly spaced at the bottom of the arc-shaped infusion pipes 23, with the nozzles spraying towards the center of the crushing chamber 12. The micro-mist particles generated by the high-pressure micro-mist nozzles 24 are fine in size, forming a continuous water curtain barrier throughout the entire cross-section of the crushing chamber 12. Dust generated when the crushing disc 15 tears the woven bag is instantly captured by the water mist particles and agglomerates and settles upon outward diffusion. A high-pressure inlet pipe 25 is fixedly connected to the inlet of the arc-shaped infusion pipe 23. The upper end of the high-pressure inlet pipe 25 passes through the upper cover 13 and is placed on its outside, and is connected to the external high-pressure water supply pipeline.

[0031] like Figure 10As shown, the self-cleaning unit of the cavity wall includes a pair of cleaning fluid delivery pipes 26 respectively arranged along the length direction at the connection between the housing 11 and the upper cover 13, that is, installed at the transition positions on the left and right sides of the joint between the housing 11 and the upper cover 13. The cleaning fluid delivery pipes 26 run through the entire crushing chamber 12 along the length direction of the housing 11. The pair of cleaning fluid delivery pipes 26 are provided with multiple atomizing nozzles 27 in a manner that sprays towards the connection between the housing 11 and the upper cover 13. The spraying direction of the nozzles is directed towards the inner wall joint area of ​​the housing 11 and the upper cover 13. The sprayed water mist forms a continuously flowing water film on the wall surface, flowing downward along the inner wall, washing away the wet debris thrown onto the wall surface, and preventing wet material from adhering and agglomerating on the wall surface. A cleaning fluid inlet pipe 28 is fixedly connected to the inlet of the cleaning fluid delivery pipe 26. One end of the cleaning fluid inlet pipe 28 passes through the side wall of the housing 11 and is placed on its outside, connected to an external water supply pipeline.

[0032] like Figure 4 and Figure 12 As shown, the flotation separation mechanism 3 is connected to the discharge port of the wet anti-winding crusher 1, specifically fixedly connected to the bottom of the discharge pipe 117. The flotation separation mechanism 3 includes a separation cylinder 31, a heavy conveying unit, a light conveying unit, an air blowing unit, and an exhaust port 37. The separation cylinder 31 is a vertically arranged cylindrical-conical combination cylinder, with its upper section being a straight cylinder and its lower section being an inverted cone. The exhaust port 37 is located on the top wall plate of the separation cylinder 31 and is used to balance the internal air pressure of the separation cylinder 31, discharge excess air introduced by the air blowing unit, and prevent pressure buildup from affecting the stability of the liquid level.

[0033] In one embodiment, as shown in the attached figure, the lower outlet of the discharge pipe 117 can be directly connected to the top wall plate of the separation cylinder 31, allowing the mixture to enter from the center of the cylinder.

[0034] In a preferred embodiment, the lower outlet of the discharge pipe 117 is not directly coaxially inserted into the center of the separation cylinder 31, but is connected to the side wall of the separation cylinder 31 through a tangential feed bend (not shown in the figures). One end of the tangential feed bend is connected to the lower port flange of the discharge pipe 117 or integrally formed therein, and the other end extends horizontally or slightly inclined, and is welded or flanged to the tangential feed port on the upper cylindrical wall of the separation cylinder 31 at an angle tangential to the circumferential side wall of the separation cylinder 31. Thus, the crushed debris and water mixture falls vertically a certain distance through the discharge pipe 117, changes its flow direction through the tangential feed bend, and finally enters the cylinder along the tangential direction of the inner wall of the separation cylinder 31. This tangential feed structure allows the mixture to have an initial tangential velocity as soon as it enters the separation cylinder 31, directly forming a spiral rotation flow inside the cylinder, and constructing a swirling separation force field without additional power.

[0035] like Figure 12As shown, a heavy-duty conveying unit is located at the bottom of the separation cylinder 31 to discharge settled heavy impurities. The heavy-duty conveying unit includes a drive shaft 32 rotatably mounted at the discharge port at the bottom of the separation cylinder 31. The drive shaft 32 is driven by an independent geared motor and rotates at low speed. Spiral blades 33 are fixedly connected to the side wall of the drive shaft 32. The spiral blades 33 are full-surface type, and during rotation, they slowly convey and discharge heavy impurities such as mud, sand, and metal fragments that have settled at the bottom cone of the separation cylinder 31. Simultaneously, the pitch of the spiral blades gradually decreases at the discharge end, applying pressure to the impurities and squeezing out excess water.

[0036] like Figure 12 As shown, an air-blowing unit is located on the lower side wall of the separation cylinder 31, used to inject air bubbles into the separation cylinder 31 to assist the floating of lightweight debris. The air-blowing unit includes an annular air distribution pipe 34 fixedly connected to the outer side wall of the separation cylinder 31 near its lower side. The annular air distribution pipe 34 is an annular stainless steel pipe with a shape matching the inner wall of the conical section of the separation cylinder 31, and is connected to an external compressed air source through an air inlet pipe. Multiple air nozzles 35 are evenly spaced along the circumference of the annular air distribution pipe 34. The outlets of the air nozzles 35 penetrate the side wall of the separation cylinder 31 and are located inside the separation cylinder 31. Compressed air is distributed to each air nozzle 35 through the annular air distribution pipe 34, releasing a large number of micron- to millimeter-sized bubbles into the separation cylinder 31. As the bubbles rise, they adhere to the surface of the lightweight plastic debris, reducing the apparent density of the debris and strengthening its floating tendency, ensuring that even modified woven bag fragments with a density slightly greater than water can float efficiently.

[0037] like Figure 12 As shown, a lightweight conveying unit is disposed on the upper side wall of the separation cylinder 31 to discharge floating lightweight plastic debris. The lightweight conveying unit includes an overflow port located on the side wall of the separation cylinder 31, near the upper side, at the upper part of the cylindrical section of the separation cylinder 31. An overflow pipe 36 is fixedly connected to the outer side wall of the overflow port, and the outlet of the overflow pipe 36 is connected to a downstream solid-liquid separation device. Inside the separation cylinder 31, lightweight plastic debris floats to the liquid surface under the combined action of its own buoyancy and air bubbles, and is discharged from the overflow port through the overflow pipe 36 with the central water flow. Heavy impurities move outward and downward under the action of centrifugal force and gravity, eventually settling to the bottom conical part of the separation cylinder 31 and being discharged by the spiral blades 33, thereby achieving effective separation of lightweight plastic debris and heavy impurities.

[0038] The working process of the device of the present invention is as follows: the waste woven bags to be recycled are continuously fed into the feed pipe 112 via a conveyor belt. They are fully wetted when passing through the water mist zone formed by the wide-angle fan-shaped nozzles 22 of the feed pre-wetting unit, and then forced into the crushing chamber 12 by the feeding rollers 113. Inside the crushing chamber 12, the drive motor 115 drives the crushing disc 15 to rotate at high speed through the rotating shaft 14, tearing and shearing the wetted woven bags. At the same time, the pusher fan 16 pushes the material and water mixture axially towards the discharge port. The high-pressure micro-mist nozzles 24 of the crushing zone water curtain unit form a dense water curtain barrier in the crushing chamber 12, capturing the dust generated during the crushing process. The atomizing nozzles 27 of the chamber wall self-cleaning unit form a continuous water film on the inner wall surfaces of the housing 11 and the upper cover 13 to prevent wet material from sticking to the walls. The mixture of crushed debris and water, having been broken down to the appropriate particle size, passes through the sieve holes of the discharge grate 118. After being buffered and dissipated by the buffer plate 119 inside the discharge pipe 117, it enters the separation cylinder 31 of the flotation separation mechanism 3 tangentially. Inside the separation cylinder 31, the mixture forms a spiral rotating flow. Light plastic debris floats to the liquid surface under the combined action of buoyancy and air bubbles released by the air jet nozzle 35 of the blowing unit, and is discharged through the overflow pipe 36 to enter the subsequent dewatering and granulation processes. Heavy impurities settle to the bottom cone of the separation cylinder 31 and are periodically discharged by the spiral blades 33. The entire device realizes continuous integrated processing of woven bags from feeding, impregnation and crushing, dust removal and suppression, fiber self-cleaning to impurity separation.

[0039] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency crushing and recycling device for woven bags, characterized in that, include: A wet anti-winding crusher includes a shell, an upper cover attached to the shell, a moving blade unit, and a fixed blade unit. A crushing chamber is formed between the shell and the upper cover. The moving blade unit is rotatably disposed within the crushing chamber, and the fixed blade unit is disposed on the inner wall of the shell and cooperates with the moving blade unit. The moving blade unit includes a rotating shaft rotatably connected to two side walls along the length of the shell, a plurality of crushing discs fixedly fixed along the rotating shaft at axial intervals, and pusher blades disposed between adjacent crushing discs. The pusher blades are used to push the material-water mixture in the crushing chamber axially towards the discharge port when the moving blade unit rotates. The fixed blade unit is used to peel off fibers wrapped around the moving blade unit when the moving blade unit rotates. The spraying mechanism includes a feed pre-wetting unit, a crushing zone water curtain unit, and a chamber wall self-cleaning unit, which are used to spray water medium into the crushing chamber and the feed area; The flotation separation mechanism is connected to the discharge port of the wet anti-winding crusher to receive the mixture of debris and water, thereby achieving the hydraulic separation of lightweight plastic debris and heavy impurities.

2. The high-efficiency crushing and recycling device for woven bags according to claim 1, characterized in that, The propulsion blades are arranged spirally on the rotating shaft, and their spiral angle gradually decreases from the feed end to the discharge end, so as to apply an increasing axial pushing force to the material; the outer edge of the crushing disc is provided with serrated or hook-shaped cutting edges for tearing and shearing the wetted woven bags.

3. The high-efficiency crushing and recycling device for woven bags according to claim 1, characterized in that, The moving blade unit includes A pair of tool holders are respectively disposed on the inner sidewalls of the two sidewalls along the length of the housing; A pair of first comb-shaped stripping blades are fixedly connected to a pair of blade holders along the length direction, and their teeth correspond to the tooth gap of the crushing disc, for stripping fibers wrapped around the crushing disc; Multiple second comb-shaped stripping blades are fixedly connected to a pair of blade holders in a vertical and equally spaced manner, and are arranged sequentially between adjacent crushing discs and pusher blades to strip fibers wrapped around the rotating shaft, crushing discs and pusher blades.

4. The high-efficiency crushing and recycling device for woven bags according to claim 3, characterized in that, The fixed-blade unit further includes a pair of elastic preload members, each comprising multiple guide rods, multiple compression springs, multiple fixing seats, and a pair of elastic protective strips. One end of each of the guide rods is fixedly connected to the side wall of the blade holder, and the other end is slidably positioned on the outside of the housing. The multiple compression springs are respectively sleeved on the side walls of the guide rods positioned on the outside of the housing. The multiple fixing seats are respectively fixedly connected to the outer side wall of the housing, and one end of each compression spring is fixedly connected to the inner side wall of the fixing seat. The pair of elastic protective strips are respectively fixedly connected between the upper and lower side walls of the blade holder and the inner side wall of the housing.

5. The high-efficiency crushing and recycling device for woven bags according to claim 1, characterized in that, One end of the top cover has a feed inlet, and a feed pipe is fixedly connected to the feed inlet; a feeding roller is rotatably connected to the side wall of the housing at the lower end of the feed inlet, and multiple feeding rods are fixedly connected to the feeding roller, and the multiple feeding rods are arranged in an alternating manner; one end of the rotating shaft is connected to a drive motor, and a drive belt is provided between the rotating shaft and the feeding roller.

6. The high-efficiency crushing and recycling device for woven bags according to claim 5, characterized in that, The bottom wall panel of the housing has an outlet at the end away from the feed inlet. A discharge pipe is fixedly connected to the bottom of the outlet, and a discharge grate is detachably installed on the outlet. A pair of buffer plates are fixedly connected to the inner wall of the discharge pipe, and the pair of buffer plates are arranged in an alternating manner and inclined downwards.

7. A high-efficiency crushing and recycling device for woven bags according to claim 6, characterized in that, The feeding pre-wetting unit includes an annular liquid delivery pipe fixedly connected to the inner wall of the feed port on the upper cover. The annular liquid delivery pipe is located above the feeding roller. Multiple wide-angle fan-shaped nozzles are evenly spaced along the circumference on the inner annular wall of the annular liquid delivery pipe. The multiple wide-angle fan-shaped nozzles are all arranged in a downward tilting manner toward one side of the central axis of the annular liquid delivery pipe.

8. The high-efficiency crushing and recycling device for woven bags according to claim 7, characterized in that, The water curtain unit in the crushing zone includes multiple arc-shaped infusion pipes fixedly connected to the bottom of the upper cover, and the multiple arc-shaped infusion pipes are arranged sequentially along the length of the upper cover; multiple high-pressure micro-mist nozzles are provided at equal intervals at the bottom of the arc-shaped infusion pipes; a high-pressure infusion pipe is fixedly connected to the inlet of the arc-shaped infusion pipe, and the upper end of the high-pressure infusion pipe passes through the upper cover and is placed on its outside. The cavity wall self-cleaning unit includes a pair of cleaning fluid delivery pipes respectively arranged along the length direction at the connection between the housing and the top cover. The pair of cleaning fluid delivery pipes are provided with multiple atomizing nozzles in a manner that sprays towards the connection between the housing and the top cover. A cleaning fluid inlet pipe is fixedly connected to the inlet of the cleaning fluid delivery pipe. One end of the cleaning fluid delivery pipe passes through the side wall of the housing and is placed on its outside.

9. A high-efficiency crushing and recycling device for woven bags according to claim 8, characterized in that, The flotation separation mechanism includes: The separation cylinder is fixedly connected to the bottom of the discharge pipe, and the discharge pipe conveys the material into the separation cylinder in a straight or tangential manner; A heavy-duty conveying unit is located at the bottom of the separation cylinder; A lightweight conveying unit is disposed on the upper side wall of the separation cylinder; An air blowing unit is disposed on the lower side wall of the separation cylinder; The exhaust port is located on the top wall panel of the separation cylinder.

10. A high-efficiency crushing and recycling device for woven bags according to claim 9, characterized in that, The heavy conveying unit includes a drive shaft that is rotatably disposed at the bottom outlet of the separation cylinder, and a spiral blade is fixedly connected to the side wall of the drive shaft. The blowing unit includes an annular air distribution pipe fixedly connected to the outer wall of the separation cylinder and close to the lower side. Multiple air nozzles are evenly spaced along the circumference of the annular air distribution pipe. The air outlet of the air nozzle passes through the side wall of the separation cylinder and is placed inside the separation cylinder. The lightweight conveying unit includes an overflow port located on the side wall of the separation cylinder and near the top, and an overflow pipe is fixedly connected to the outer side wall of the overflow port.

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