A PVA film recovery and regeneration device and use method thereof

Abstract

The present invention relates to a PVA film recycling and regeneration device, comprising a crushing device and a stirring reaction device, wherein the crushing device is provided with a crushing bin, the crushing bin is provided with a flap, the flap is provided with a discharge port, the stirring reaction device comprises a first base, the first base is fixedly connected with a stirring reaction kettle, the top opening of the stirring reaction kettle is fixedly connected with a top cover, the top cover is provided with a feed port, the first base is fixedly connected with a vacuum pumping motor, the pumping bin provided by the vacuum pumping motor is connected with the discharge port through an input hose, the pumping bin is connected with the feed port through an output pipe, and a stirring exhaust shaft is rotatably provided in the middle of the top cover. The present invention relates to a method for using a PVA film recycling and regeneration device, which can recycle crushed PVA films that should have been discarded, thereby reducing waste and promoting green environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of PVA film recovery, and in particular to a PVA film recovery and regeneration device and a use method thereof. Background Art

[0002] Polyvinyl alcohol (PVA) is odorless, non-toxic, harmless to the human body, and can be mass-produced by non-petroleum routes at a low price. Polyvinyl alcohol (PVA) film is made of polyvinyl alcohol as the main body, with modifiers and other additives added through a special process. Polyvinyl alcohol (PVA) is the only vinyl polymer that can be used by bacteria as a carbon source and energy source. It can be completely degraded into carbon dioxide and water under the action of bacteria and enzymes, and has the effect of improving land.

[0003] Polyvinyl alcohol (PVA) has good density, high crystallinity, and strong adhesion. The film made from it is flexible, smooth, oil-resistant, solvent-resistant, abrasion-resistant, and has outstanding gas barrier properties, and has unique advantages in food and drug packaging. Polyvinyl alcohol (PVA) film can be used as an ink layer carrier film for water transfer printing, a wrapping film for laundry beads, food packaging bags, and anti-static packaging for electronic products. It can be seen that polyvinyl alcohol (PVA) film has a wide range of uses.

[0004] Since polyvinyl alcohol (PVA) film is easily degradable, some finished polyvinyl alcohol (PVA) film products will degrade and become brittle and broken during storage due to improper temperature and humidity control or excessive storage time, and cannot be used for subsequent processing and use. In the prior art, polyvinyl alcohol (PVA) film that is broken during storage is generally thrown away as waste, resulting in waste. Summary of the invention

[0005] The purpose of the present invention is to provide a PVA film recovery and regeneration device and a method of using the same, which can recover broken PVA films that would otherwise be discarded, thereby reducing waste and promoting green environmental protection.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A PVA film recovery and regeneration device comprises a crushing device and a stirring reaction device, wherein the crushing device is provided with a crushing bin, the crushing bin is provided with a flap, the flap is provided with a discharge port, the stirring reaction device comprises a first base, the first base is fixedly connected with a stirring reaction kettle, the top opening of the stirring reaction kettle is fixedly connected with a top cover, the top cover is provided with a feed port, the first base is fixedly connected with a vacuum extraction motor, the extraction bin provided with the vacuum extraction motor is connected with the discharge port through an input hose, the extraction bin is connected with the feed port through an output pipe, a stirring and exhausting shaft is rotatably provided in the middle of the top cover, the stirring and exhausting shaft is a hollow shaft, a plurality of rows of ventilation holes are provided in the axial direction of the stirring and exhausting shaft, the ventilation holes in the same row are arranged circumferentially, a plurality of layers of stirring and exhausting paddles are fixedly sleeved on the stirring and exhausting shaft, the stirring and exhausting paddles in the same layer are arranged circumferentially, each stirring and exhausting paddle is provided with a ventilation cavity, the opening of the ventilation cavity is located at the stirring At the inner end of the exhaust paddle, the opening edges of each ventilation cavity are abutted against the outer wall of the stirring exhaust shaft, and each ventilation cavity corresponds to a ventilation hole. The ventilation cavity of the stirring exhaust paddle is connected with the stirring exhaust shaft through the ventilation hole. The stirring exhaust paddle is provided with a plurality of one-way exhaust valves. The upper section of the stirring exhaust shaft is fixedly sleeved with an exhaust shaft input gear. The top cover is fixedly connected with an exhaust shaft driving motor. The exhaust shaft driving motor is used to drive the exhaust shaft input gear to rotate. A plug is provided at the lower end of the stirring exhaust shaft. An air inlet is provided at the upper end of the stirring exhaust shaft. The upper end of the stirring exhaust shaft is used to connect the intake pipe. The intake pipe is fixedly arranged. The lower end of the intake pipe is fixedly connected with an intake sleeve seat by screws. The upper end of the stirring exhaust shaft is fixedly connected with a swivel joint. The partial section of the outer wall of the swivel joint is gap-matched with the inner ring wall of the intake sleeve seat. The partial section of the outer wall of the swivel joint is provided with a plurality of mounting ring grooves, and the mounting ring grooves are provided with sealing rings.

[0008] Specifically, the side profile of the stirring and exhausting paddle is triangular in shape, the bottom wall of the stirring and exhausting paddle gradually tilts downward from the outside to the inside, and the top wall of the stirring and exhausting paddle is parallel to the horizontal plane.

[0009] Specifically, the rear side of the stirring exhaust paddle along the rotation direction is the departing side, a plurality of one-way exhaust valves are arranged on the departing side, and the plurality of one-way exhaust valves are evenly arranged in the radial direction.

[0010] The cam is secured to the bottom of the wheelchair and is adapted to engage with the support member to move relative to the wheelchair, wherein the cam is secured to the bottom of the wheelchair and is adapted to engage with the support member to move relative to the wheelchair.

[0011] Specifically, a cone-shaped portion protruding upward is provided in the middle of the bottom wall of the stirred reactor, a homogenizing stirring frame is fixedly connected to the bottom end of the stirring exhaust shaft, the homogenizing stirring frame is provided with a plurality of stirring frames, the inner contour of the stirring frame corresponds to the cone-shaped portion, a liquid outlet is provided at the edge of the bottom wall of the stirred reactor, the liquid outlet is connected to a liquid outlet delivery pump, the liquid outlet delivery pump is fixedly connected to the first base, a spiral blade rotating rod is provided in the liquid outlet delivery pump, the liquid outlet of the liquid outlet delivery pump is connected to a liquid outlet valve, and a liquid inlet is provided at the top cover, and the liquid inlet is used to connect a liquid inlet pipe.

[0012] Specifically, the top wall of the top cover is fixedly connected with a bearing mounting sleeve, the upper outer wall of the stirring and exhausting shaft is provided with a limiting flange, the lower opening of the inner cavity of the bearing mounting sleeve is provided with a secondary countersunk hole, the lower ring groove of the secondary countersunk hole is provided with a thrust bearing, the stirring and exhausting shaft passes through the thrust bearing, the upper ring of the thrust bearing supports the limiting flange, the inner cavity of the bearing mounting sleeve is provided with a rolling bearing, and the stirring and exhausting shaft cooperates with the inner ring of the rolling bearing.

[0013] Specifically, the crushing device is provided with a second base, the second base is hinged with a swing arm body, the second base is connected to a swing hydraulic cylinder, the cylinder body end of the swing hydraulic cylinder is hinged to the second base, the piston rod end of the swing hydraulic cylinder is hinged to the swing arm body, the swing arm body is fixedly connected to the swing base, the swing base is rotatably provided with a crushing bin, the swing base is rotatably provided with a crushing shaft, the crushing shaft extends into the crushing bin, the outer wall of the crushing shaft is provided with crushing blades, and the rotating circular trajectory of the crushing blades is close to the inner wall of the crushing bin.

[0014] Specifically, a crushing motor is installed in the swing base, a pulley is fixedly connected to the upper end of the crushing shaft, the crushing motor is used to drive the crushing shaft to rotate, a rotating bin motor is installed in the swing base, a bin connecting shaft is fixedly connected to the middle of the bottom wall of the crushing bin, the bin connecting shaft is rotatably connected to the swing base, and the rotating bin motor is used to drive the bin connecting shaft to rotate.

[0015] Specifically, a plurality of buffer pads are fixedly connected to the top wall of the bottom frame of the second base. When the bottom wall of the swing base abuts against the plurality of buffer pads, the swing base is in a reset state, and the crushing shaft is in a vertical state. The swing base is provided with a damping torsion bar rotatably connected, and the damping torsion bar is fixedly connected to a swing rod, and the front section of the swing rod is fixedly connected to the flap. The swing base is fixedly connected to a supporting rod. When the swing rod abuts against the supporting rod, the flap covers the opening of the crushing bin.

[0016] A method for using a PVA film recovery and regeneration device comprises the following steps:

[0017] S1: Collect the broken polyvinyl alcohol film, place it in the crushing bin, and close the flip cover on the opening of the crushing bin;

[0018] S2: The crushing motor starts to rotate the crushing shaft. At the same time, the rotating chamber motor starts to rotate the crushing chamber, thereby shredding the polyvinyl alcohol film in the crushing chamber. During this process, the swing hydraulic cylinder drives its piston rod to reciprocate and extend, thereby driving the swing base to swing back and forth, thereby driving the crushing chamber and the crushing shaft to swing back and forth with the swing base, thereby shredding the polyvinyl alcohol film in the crushing chamber into fine pieces;

[0019] S3: The bin transfer motor stops, the lower end of the input hose is connected to the discharge port, the upper end of the input hose is connected to the extraction bin connected to the vacuum extraction motor, and the output material pipe is connected to the feed port, so that the polyvinyl alcohol film flakes in the crushing bin are extracted into the stirred reactor. In this process, the polyvinyl alcohol solvent, plasticizer and additive are added into the stirred reactor through the liquid inlet pipe;

[0020] S4: High-temperature steam is introduced into the air inlet pipe, and the high-temperature steam enters the stirring exhaust shaft, and then enters each ventilation cavity through the vent hole, and then is discharged through each one-way exhaust valve to heat the mixed slurry in the stirring reactor. During this process, the stirring exhaust shaft rotates, driving each stirring exhaust paddle to rotate;

[0021] S5: When each stirring and exhausting paddle rotates and passes through the lower side of the flipping blade, the water flow driven by the stirring and exhausting paddle pushes the bent bottom wall and the vertical rod to move upward once, and the upwardly moved vertical rod is immediately pressed downward and reset by the reset spring.

[0022] S6: The liquid delivery pump is turned on to discharge the mixed slurry in the stirred reactor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In S1, while the crushing shaft rotates, the crushing chamber also rotates, so that the materials at the bottom of the crushing chamber are cut back and forth multiple times by the crushing shaft, and the swing hydraulic cylinder drives the swing base to swing back and forth, thereby driving the crushing chamber and the crushing shaft to swing back and forth with the swing base, so that the materials in the crushing chamber are shaken back and forth, and are cut more fully and thoroughly by the crushing shaft, so that the materials in the crushing chamber are fully cut into fine pieces.

[0025] Second, in S4, the mixed slurry of the polyvinyl alcohol solvent, the plasticizing modifier and the auxiliary agent is subjected to modification treatment in the stirred reactor. During the modification treatment, continuous heating is required, and the mixed slurry needs to maintain a water content of 15%-30%, and the mixed slurry in the stirred reactor must be uniform. To this end, the present invention discharges high-temperature water vapor from the one-way exhaust valve provided by each stirring exhaust paddle, and the one-way exhaust valve rotates with the stirring exhaust paddle to exhaust uniformly, thereby uniformly heating all parts of the mixed slurry to avoid local uneven hot and cold. Furthermore, the introduced water vapor can maintain the water content of the mixed slurry, thereby ensuring the progress of the modification treatment.

[0026] 3. In S5, when each stirring and exhausting paddle rotates and passes by the lower side of the flipping blade, the water flow driven by the stirring and exhausting paddle pushes the bent bottom wall and the vertical rod upward once, and the upwardly moved vertical rod is immediately pressed down and reset by the reset spring, that is, when each stirring and exhausting paddle passes by the flipping blade, it will drive the flipping blade to move upward and reset once, so that the mixed slurry at the height of the flipping blade can be intermittently flipped, so that the liquid mixing is more uniform, and the temperature of the mixed slurry can be uniform everywhere, avoiding local uneven cold and heat.

[0027] The cross-sectional profile of the flap blades perpendicular to the radial direction is L-shaped, forming a bent bottom wall, which gradually bends upward toward the direction of the departure side, and the width of the bent bottom wall gradually narrows from the outside to the inside, so that the edge of the bent bottom wall close to the departure side gradually tilts from the outside to the inside in the opposite direction of the departure side. When the stirring and exhausting paddle passes by, the force generated by the water flow driven by it on the bottom surface of the bent bottom wall will form an upward component force, causing the bent bottom wall and the vertical rod to move upward.

[0028] Fourth, the PVA film recycling and regeneration device of the present invention can recycle broken PVA films, and break, mix, heat and dissolve them, modify them, and finally form a slurry that meets the requirements of producing PVA films again, and output it to subsequent coating and other links through a liquid delivery pump. Through the above-mentioned recycling and regeneration process, broken PVA films that should have been discarded can be effectively utilized, reducing waste and promoting green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is an upper side view of the PVA film recovery and regeneration device;

[0031] Figure 2 It is a bottom side view of the PVA film recovery and regeneration device;

[0032] Figure 3 is a view of a stirred tank reactor;

[0033] Figure 4 A view of a stirring exhaust shaft and a stirring exhaust paddle;

[0034] Figure 5 It is a cross-sectional view of the stirring exhaust shaft and the stirring exhaust paddle;

[0035] Figure 6 for Figure 5A partial view of

[0036] Figure 7 for Figure 5 A partial view of

[0037] Figure 8 A view of the stirring exhaust paddle, the bent bottom wall and related structures;

[0038] Fig. 9 An exploded view of the bent bottom wall and related structures;

[0039] Fig.10 A view of the exhaust paddle for stirring;

[0040] Fig.11 is a view of the crushing device;

[0041] Fig.12 This is a view of the internal structure of the crushing device;

[0042] Fig.13 It is a partial view of the crushing device;

[0043] Fig.14 This is a view of the crushing chamber;

[0044] Fig.15 A side view of the crushing device.

[0045] In the figure:

[0046] 101, second base; 102, buffer pad; 11, crushing bin; 111, bin connecting shaft; 12, flip cover; 121, discharge port; 13, swing arm body; 14, swing hydraulic cylinder; 15, swing base; 151, damping torsion bar; 152, swing rod; 153, supporting rod; 16, crushing shaft; 161, crushing blade; 17, bin transfer motor;

[0047] 21. stirring reactor; 211. conical part; 212. liquid outlet; 22. top cover; 221. feed inlet; 222. liquid inlet; 23. strip bracket; 231. vertical sliding sleeve; 232. limit plate; 24. vertical rod; 241. limit rod; 242. flip fan blade; 2421. bent bottom wall; 243. reset spring; 25. liquid delivery pump; 251. liquid outlet valve; 26. bearing mounting sleeve; 261. thrust bearing; 262. rolling bearing;

[0048] 31. Vacuum extraction motor; 311. Extraction bin; 32. Input hose; 33. Output pipe;

[0049] 41. stirring and exhaust shaft; 411. vent hole; 412. plug; 413. limit flange; 42. stirring and exhaust paddle; 421. ventilation cavity; 422. one-way exhaust valve; 43. exhaust shaft input gear; 44. rotary joint; 441. mounting ring groove; 45. homogenizing stirring frame; 451. stirring frame; 46. exhaust shaft drive motor;

[0050] 5. Intake pipe; 51. Intake sleeve;

[0051] 6. Liquid inlet pipe. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0053] See Figures 1 to 15 A PVA film recycling and regeneration device includes a crushing device and a stirring reaction device. The crushing device is provided with a crushing bin 11, the crushing bin 11 is provided with a flap 12, and the flap 12 is provided with a discharge port 121.

[0054] The stirring reaction device includes a first base, a stirring reaction kettle 21 is fixedly connected to the first base, a top cover 22 is fixedly connected to the top opening of the stirring reaction kettle 21, and the top cover 22 is provided with a feed port 221. A vacuum pumping motor 31 is fixedly connected to the first base, and the vacuum pumping motor 31 is provided with a pumping bin 311, and the pumping bin 311 is connected to the discharge port 121 through an input hose 32. The pumping bin 311 is connected to the feed port 221 through an output pipe 33.

[0055] The middle part of the top cover 22 is rotatably provided with a stirring and exhausting shaft 41, which is a hollow shaft. The stirring and exhausting shaft 41 is provided with a plurality of rows of vent holes 411 along the axial direction, and the vent holes 411 in the same row are arranged circumferentially. The stirring and exhausting shaft 41 is fixedly sleeved with a plurality of layers of stirring and exhausting paddles 42, and the stirring and exhausting paddles 42 in the same layer are arranged circumferentially. Each stirring and exhausting paddle 42 is provided with a ventilation cavity 421, and the opening of the ventilation cavity 421 is located at the inner end of the stirring and exhausting paddle 42. The opening edge of each ventilation cavity 421 is in contact with the outer wall of the stirring and exhausting shaft 41, and each ventilation cavity 421 corresponds to a vent hole 411, and the ventilation cavity 421 is connected with the stirring and exhausting shaft 41 through the corresponding vent hole 411. The stirring and exhausting paddle 42 is provided with a plurality of one-way exhaust valves 422.

[0056] The upper section of the stirring exhaust shaft 41 is fixedly sleeved with an exhaust shaft input gear 43, and the top cover 22 is fixedly connected with an exhaust shaft drive motor 46, and the exhaust shaft drive motor 46 is used to drive the exhaust shaft input gear 43 to rotate. A plug 412 is provided at the lower end of the stirring exhaust shaft 41. An air inlet is provided at the upper end of the stirring exhaust shaft 41, and the upper end of the stirring exhaust shaft 41 is used to connect the air intake pipe 5, and the air intake pipe 5 is fixedly set at the workshop site. The lower end of the air intake pipe 5 is fixedly connected with an air intake sleeve seat 51 by screws, and the upper end of the stirring exhaust shaft 41 is fixedly connected with a rotary joint 44, and a partial section of the outer wall of the rotary joint 44 is gap-matched with the inner ring wall of the air intake sleeve seat 51, and a partial section of the outer wall of the rotary joint 44 is provided with a plurality of mounting ring grooves 441, and the mounting ring grooves 441 are provided with sealing rings.

[0057] The top cover 22 is provided with a liquid inlet 222, and the liquid inlet 222 is used to connect the liquid inlet pipe 6, and the liquid inlet pipe 6 is fixedly arranged at the workshop site.

[0058] Specifically, the side surface (refer to the “facing side” below) of the stirring and exhausting paddle 42 is triangular in shape, the bottom wall of the stirring and exhausting paddle 42 gradually tilts downward from the outside to the inside, and the top wall of the stirring and exhausting paddle 42 is parallel to the horizontal plane.

[0059] Specifically, the rear side of the stirring and exhausting paddle 42 along the rotation direction is the away side ( Figure 7 The one-way exhaust valves 422 are arranged on the side away from the one-way exhaust valves 422, and the one-way exhaust valves 422 are evenly arranged in the radial direction.

[0060] Specifically, a plurality of strip-shaped brackets 23 are fixedly connected to the inner wall of the stirred reactor 21, and a vertical sliding sleeve 231 is provided at the inner end of the strip-shaped bracket 23. The vertical sliding sleeve 231 is slidably connected to the vertical rod 24, and a flip blade 242 is fixedly connected to the bottom end of the vertical rod 24. The upper side of the opening of the vertical sliding sleeve 231 is fixedly connected to the limit plate 232. The top end of the vertical rod 24 is fixedly connected to the limit rod 241, and the upper section of the limit rod 241 is fixedly installed with a limit nut. The limit rod 241 is sleeved with a return spring 243, and the two ends of the return spring 243 are respectively against the bottom side of the limit plate 232 and the top end of the vertical rod 24.

[0061] The flap blades 242 are arranged along the radial direction, and the cross-sectional profile of the flap blades 242 along the perpendicular direction is L-shaped, forming a bent bottom wall 2421, and the bent bottom wall 2421 is gradually bent upward in the direction away from the side (see Figure 8 ), the width of the bent bottom wall 2421 gradually narrows from the outside to the inside, so that the edge of the bent bottom wall 2421 close to the away side gradually tilts from the outside to the inside in the opposite direction of the away side.

[0062] Specifically, a cone-shaped portion 211 protruding upward is provided in the middle of the bottom wall of the stirring reactor 21 , a homogenizing stirring frame 45 is fixedly connected to the bottom end of the stirring exhaust shaft 41 , and the homogenizing stirring frame 45 is provided with a plurality of stirring frames 451 , and the inner contour of the stirring frame 451 corresponds to the cone-shaped portion 211 .

[0063] A liquid outlet 212 is provided at the bottom wall edge of the stirred reactor 21, and the liquid outlet 212 is connected to a liquid delivery pump 25, which is fixed to the first base and has a spiral blade rotating rod. The liquid outlet 212 of the liquid delivery pump 25 is connected to a liquid outlet valve 251.

[0064] Specifically, see Figure 6 The top wall of the top cover 22 is fixedly connected with a bearing mounting sleeve 26, the upper outer wall of the stirring exhaust shaft 41 is provided with a limiting flange 413, the lower opening of the inner cavity of the bearing mounting sleeve 26 is provided with a secondary countersunk hole, the lower ring groove of the secondary countersunk hole is provided with a thrust bearing 261, the stirring exhaust shaft 41 passes through the thrust bearing 261, and the upper ring of the thrust bearing 261 supports the limiting flange 413. The inner cavity of the bearing mounting sleeve 26 is provided with a rolling bearing 262, and the stirring exhaust shaft 41 cooperates with the inner ring of the rolling bearing 262.

[0065] Specifically, the crushing device is provided with a second base 101, and the support feet of the second base 101 can be fixed to the ground of the site by screws. The second base 101 is hinged with a swing arm body 13, and the hinge axis is Fig.12 The second base 101 is connected to a swing hydraulic cylinder 14, the cylinder end of the swing hydraulic cylinder 14 is hinged to the second base 101, and the piston rod end of the swing hydraulic cylinder 14 is hinged to the swing arm 13 (the hinge axis is Fig.12 The swing arm body 13 is fixedly connected with a swing base 15, the lower part of the swing base 15 is rotatably provided with a crushing chamber 11, the upper part of the swing base 15 is rotatably provided with a crushing shaft 16, the crushing shaft 16 extends into the crushing chamber 11, and the outer wall of the crushing shaft 16 is provided with a crushing blade 161. The rotating circumferential trajectory of the crushing blade 161 is close to the inner wall of the crushing chamber 11.

[0066] Specifically, a crushing motor is installed in the swing base 15, and a pulley is fixedly connected to the upper end of the crushing shaft 16. The crushing motor is used to drive the crushing shaft 16 to rotate. A bin rotating motor 17 is installed in the swing base 15. A bin connecting shaft 111 is fixedly connected to the middle of the bottom wall of the crushing bin 11. The bin connecting shaft 111 is rotatably connected to the lower part of the swing base 15, and the bin rotating motor 17 is used to drive the bin connecting shaft 111 to rotate.

[0067] Specifically, a plurality of buffer pads 102 are fixedly connected to the top wall of the bottom frame of the second base 101. When the bottom wall of the swing base 15 abuts against the plurality of buffer pads 102, the swing base 15 is in a reset state (eg, Fig.15As shown), at this time, the crushing shaft 16 is in a vertical state.

[0068] The swing base 15 is provided with a damping torsion bar 151 which is rotatably connected. The damping torsion bar 151 is fixedly connected to a swing bar 152. The front section of the swing bar 152 is fixedly connected to the flip cover 12. The connection between the damping torsion bar 151 and the swing base 15 is damped, so that when the flip cover 12 is opened around the damping torsion bar 151, the flip cover 12 can be kept in the opened position. The swing base 15 is fixedly connected to a supporting rod 153. When the swing bar 152 abuts against the supporting rod 153, the flip cover 12 covers the opening of the crushing chamber 11. When covering, a rotation gap ( Fig.11 When the crushing chamber 11 rotates, the rotation gap can prevent the flap 12 from interfering with the crushing chamber 11.

[0069] A method for using a PVA film recovery and regeneration device comprises the following steps:

[0070] S1: Collect the broken polyvinyl alcohol film, place it in the crushing bin 11, and close the flip cover 12 on the opening of the crushing bin 11;

[0071] S2: The crushing motor starts to rotate the crushing shaft 16. At the same time, the rotating chamber motor 17 starts to rotate the crushing chamber 11, thereby shredding the polyvinyl alcohol film in the crushing chamber 11. In this process, the swing hydraulic cylinder 14 drives its piston rod to reciprocate and extend and shorten, thereby driving the swing base 15 to swing back and forth (refer to Fig.15 ), thereby driving the crushing chamber 11 and the crushing shaft 16 to swing back and forth along with the swing base 15, thereby chopping the polyvinyl alcohol film in the crushing chamber 11 into fine pieces;

[0072] S3: The bin transfer motor 17 is stopped, the lower end of the input hose 32 is connected to the discharge port 121, the upper end of the input hose 32 is connected to the extraction bin 311 connected to the vacuum extraction motor 31, and the output material pipe 33 is connected to the feed port 221, so that the polyvinyl alcohol film flakes in the crushing bin 11 are extracted into the stirred reactor 21. In this process, the polyvinyl alcohol solvent, plasticizer and additive are added into the stirred reactor 21 through the liquid inlet pipe 6;

[0073] S4: High-temperature water vapor is introduced into the air inlet pipe 5, and the high-temperature water vapor enters the stirring and exhausting shaft 41, and then enters each ventilation cavity 421 through the vent hole 411, and then is discharged through each one-way exhaust valve 422 to heat the mixed slurry in the stirring reactor 21. During this process, the stirring and exhausting shaft 41 rotates, driving each stirring and exhausting paddle 42 to rotate, so as to stir the mixed slurry evenly;

[0074] S5: When each stirring and exhausting paddle 42 rotates and passes over the lower side of the flipping blade 242, the water flow driven by the stirring and exhausting paddle 42 pushes the bent bottom wall 2421 and the vertical rod 24 to move upward once, and the upwardly moved vertical rod 24 is immediately pressed downward by the return spring 243 to return to its original position.

[0075] S6: The liquid delivery pump 25 is turned on to discharge the mixed slurry in the stirred reactor 21.

[0076] The technical effects of the PVA membrane recovery and regeneration device are as follows:

[0077] 1. In S1, while the crushing shaft 16 rotates, the crushing chamber 11 also rotates, so that the materials at various locations at the bottom of the crushing chamber 11 are cut back and forth multiple times by the crushing shaft 16, and the swing hydraulic cylinder 14 drives the swing base 15 to swing back and forth, thereby driving the crushing chamber 11 and the crushing shaft 16 to swing back and forth with the swing base 15, so that the materials in the crushing chamber 11 are shaken back and forth, and are cut more fully and thoroughly by the crushing shaft 16, so that the materials in the crushing chamber 11 are fully cut into fine pieces.

[0078] Second, in S4, the mixed slurry of the polyvinyl alcohol solvent, the plasticizing modifier and the auxiliary agent is subjected to modification treatment in the stirred reactor 21. During the modification treatment, continuous heating is required, and the mixed slurry needs to maintain a water content of 15%-30%, and the mixed slurry in the stirred reactor 21 must be uniform. For this reason, the present invention discharges high-temperature water vapor from the one-way exhaust valve 422 provided by each stirring exhaust paddle 42, and the one-way exhaust valve 422 rotates with the stirring exhaust paddle 42, thereby exhausting the air uniformly, thereby uniformly heating all parts of the mixed slurry to avoid local uneven cold and heat. Furthermore, the introduced water vapor can maintain the water content of the mixed slurry, thereby ensuring the progress of the modification treatment.

[0079] 3. In S5, when each stirring and exhausting paddle 42 rotates and passes by the lower side of the flipping blade 242, the water flow driven by the stirring and exhausting paddle 42 pushes the bent bottom wall 2421 and the vertical rod 24 to move up once, and the upwardly moved vertical rod 24 is immediately pressed down and reset by the reset spring 243, that is, when each stirring and exhausting paddle 42 passes by the flipping blade 242, it will drive the flipping blade 242 to move up and reset once, so that the mixed slurry at the height of the bent bottom wall 2421 can be intermittently flipped, so that the slurry is mixed more evenly, and the temperature of the mixed slurry can be made uniform everywhere, avoiding local uneven cold and heat.

[0080] The cross-sectional profile of the flap blade 242 along the perpendicular radial direction is L-shaped, forming a bent bottom wall 2421, which is gradually bent upward toward the direction of the departing side, and the width of the bent bottom wall 2421 gradually narrows from the outside to the inside, so that the edge of the bent bottom wall 2421 close to the departing side gradually tilts from the outside to the inside in the opposite direction of the departing side. When the stirring exhaust paddle 42 passes by, the force generated by the water flow driven by it on the bottom surface of the bent bottom wall 2421 will form an upward component force, causing the bent bottom wall 2421 and the vertical rod 24 to move upward.

[0081] Fourth, the PVA film recycling and regeneration device of the present invention can recycle the broken PVA film, and break, mix, heat and dissolve it, modify it, and finally form a slurry of PVA film that meets the production requirements, and output it to the subsequent coating and other links through the liquid delivery pump 25. Through the above-mentioned recycling and regeneration process, the broken PVA film that should have been discarded can be effectively utilized, thereby reducing waste and promoting green environmental protection.

[0082] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A PVA film recovery and regeneration device, characterized in that: The invention comprises a crushing device and a stirring reaction device, wherein the crushing device is provided with a crushing bin, the crushing bin is provided with a flap, the flap is provided with a discharge port, the stirring reaction device comprises a first base, the first base is fixedly connected with a stirring reaction kettle, the top opening of the stirring reaction kettle is fixedly connected with a top cover, the top cover is provided with a feed port, the first base is fixedly connected with a vacuum pumping motor, the pumping bin provided with the vacuum pumping motor is connected with the discharge port through an input hose, the pumping bin is connected with the feed port through an output pipe, a stirring exhaust shaft is rotatably provided in the middle of the top cover, the stirring exhaust shaft is a hollow shaft, a plurality of rows of vents are provided in the axial direction of the stirring exhaust shaft, the vents in the same row are arranged circumferentially, the stirring exhaust shaft is fixedly sleeved with a plurality of layers of stirring exhaust paddles, and the stirring exhaust shaft is provided with a plurality of layers of stirring exhaust paddles. The stirring and exhaust paddles of each layer are arranged in a circumferential direction, and each stirring and exhaust paddle is provided with a ventilation cavity, the opening of the ventilation cavity is located at the inner end of the stirring and exhaust paddle, and the opening edge of each ventilation cavity is close to the outer wall of the stirring and exhaust shaft, and each ventilation cavity corresponds to a ventilation hole, and the ventilation cavity of the stirring and exhaust paddle is connected with the stirring and exhaust shaft through the ventilation hole, and the stirring and exhaust paddle is provided with a plurality of one-way exhaust valves, and the upper section fixed sleeve of the stirring and exhaust shaft is provided with an exhaust shaft input gear, and the top cover is fixedly connected with an exhaust shaft driving motor, and the exhaust shaft driving motor is used to drive the exhaust shaft input gear to rotate, and a plug is provided at the lower end of the stirring and exhaust shaft, and an air inlet is provided at the upper end of the stirring and exhaust shaft, and the upper end of the stirring and exhaust shaft is used to connect the air inlet pipe, and the air inlet pipe is fixedly arranged. The lower end of the air inlet pipe is fixedly connected to an air inlet sleeve by screws, and the upper end of the stirring exhaust shaft is fixedly connected to a rotating joint. A partial section of the outer wall of the rotating joint is gap-matched with the inner ring wall of the air inlet sleeve. A partial section of the outer wall of the rotating joint is provided with a plurality of mounting ring grooves, and the mounting ring grooves are provided with sealing rings. The side profile of the stirring exhaust paddle is triangular in shape, and the bottom wall of the stirring exhaust paddle gradually tilts downward from the outside to the inside, and the top wall of the stirring exhaust paddle is parallel to the horizontal plane. The rear side of the stirring exhaust paddle along the rotation direction is the diverging side, and a plurality of one-way exhaust valves are arranged on the diverging side. The plurality of one-way exhaust valves are evenly arranged radially. A plurality of strip brackets are fixedly connected to the inner wall of the stirring reactor, and a vertical sliding sleeve is provided at the inner end of the strip bracket, and the vertical sliding sleeve can slide A vertical rod is connected, a flapping fan blade is fixedly connected to the bottom end of the vertical rod, a limit plate is fixedly connected to the upper side of the opening of the vertical sliding sleeve, a limit rod is fixedly connected to the top of the vertical rod, a limit nut is fixedly installed on the upper section of the limit rod, a reset spring is provided on the limit rod sleeve, two ends of the reset spring respectively press against the bottom side of the limit plate and the top end of the vertical rod, the flapping fan blade is arranged radially, and the flapping fan blade is L-shaped along the cross-sectional profile perpendicular to the radial direction, forming a bent bottom wall, the bent bottom wall is gradually bent upward toward the direction of the departure side, the bottom edge of the bent bottom wall is slightly higher than the rotation plane of the stirring exhaust paddle, and the width of the bent bottom wall is gradually narrowed from the outside to the inside, so that the edge of the bent bottom wall close to the departure side gradually tilts from the outside to the inside in the opposite direction of the departure side.

2. The PVA film recovery and regeneration device according to claim 1, characterized in that: A conical portion protruding upward is provided in the middle of the bottom wall of the stirred reactor, a homogenizing stirring frame is fixedly connected to the bottom end of the stirring exhaust shaft, the homogenizing stirring frame is provided with a plurality of stirring frames, the inner contour of the stirring frame corresponds to the conical portion, a liquid outlet is provided at the edge of the bottom wall of the stirred reactor, the liquid outlet is connected to a liquid outlet delivery pump, the liquid outlet delivery pump is fixedly connected to the first base, a spiral blade rotating rod is provided in the liquid outlet delivery pump, the liquid outlet of the liquid outlet delivery pump is connected to a liquid outlet valve, and a liquid inlet is provided at the top cover, and the liquid inlet is used to connect a liquid inlet pipe.

3. The PVA film recovery and regeneration device according to claim 2, characterized in that: The top wall of the top cover is fixedly connected with a bearing mounting sleeve, the outer wall of the upper section of the stirring and exhausting shaft is provided with a limiting flange, the lower opening of the inner cavity of the bearing mounting sleeve is provided with a secondary countersunk hole, the lower ring groove of the secondary countersunk hole is provided with a thrust bearing, the stirring and exhausting shaft passes through the thrust bearing, the upper ring of the thrust bearing supports the limiting flange, the inner cavity of the bearing mounting sleeve is provided with a rolling bearing, and the stirring and exhausting shaft cooperates with the inner ring of the rolling bearing.

4. The PVA film recovery and regeneration device according to claim 3 is characterized in that: The crushing device is provided with a second base, the second base is hinged with a swing arm body, the second base is connected to a swing hydraulic cylinder, the cylinder body end of the swing hydraulic cylinder is hinged to the second base, the piston rod end of the swing hydraulic cylinder is hinged to the swing arm body, the swing arm body is fixedly connected to the swing base, the swing base is rotatably provided with a crushing bin, the swing base is rotatably provided with a crushing shaft, the crushing shaft extends into the crushing bin, the outer wall of the crushing shaft is provided with crushing blades, and the rotating circular trajectory of the crushing blades is close to the inner wall of the crushing bin.

5. The PVA film recovery and regeneration device according to claim 4, characterized in that: A crushing motor is installed in the swing base, and a pulley is fixedly connected to the upper end of the crushing shaft. The crushing motor is used to drive the crushing shaft to rotate. A bin rotating motor is installed in the swing base, and a bin connecting shaft is fixedly connected to the middle of the bottom wall of the crushing bin. The bin connecting shaft is rotatably connected to the swing base, and the bin rotating motor is used to drive the bin connecting shaft to rotate.

6. The PVA film recovery and regeneration device according to claim 5, characterized in that: The top wall of the bottom frame of the second base is fixedly connected with a plurality of buffer pads. When the bottom wall of the swing base abuts against the plurality of buffer pads, the swing base is in a reset state, and the crushing shaft is in a vertical state. The swing base is provided with a damping torsion bar rotatably connected, the damping torsion bar is fixedly connected with a swing rod, the front section of the swing rod is fixedly connected with the flip cover, and the swing base is fixedly connected with a supporting rod. When the swing rod abuts against the supporting rod, the flip cover covers the opening of the crushing bin.

7. The method for using the PVA film recovery and regeneration device as claimed in claim 6, characterized in that: The following steps are involved: S1: Collect the broken polyvinyl alcohol film, place it in the crushing bin, and close the flip cover on the opening of the crushing bin; S2: The crushing motor starts to rotate the crushing shaft. At the same time, the rotating chamber motor starts to rotate the crushing chamber, thereby shredding the polyvinyl alcohol film in the crushing chamber. During this process, the swing hydraulic cylinder drives its piston rod to reciprocate and extend, thereby driving the swing base to swing back and forth, thereby driving the crushing chamber and the crushing shaft to swing back and forth with the swing base, thereby shredding the polyvinyl alcohol film in the crushing chamber into fine pieces; S3: The bin transfer motor stops, the lower end of the input hose is connected to the discharge port, the upper end of the input hose is connected to the extraction bin connected to the vacuum extraction motor, and the output material pipe is connected to the feed port, so that the polyvinyl alcohol film flakes in the crushing bin are extracted into the stirred reactor. In this process, the polyvinyl alcohol solvent, plasticizer and additive are added into the stirred reactor through the liquid inlet pipe; S4: High-temperature steam is introduced into the air inlet pipe, and the high-temperature steam enters the stirring exhaust shaft, and then enters each ventilation cavity through the vent hole, and then is discharged through each one-way exhaust valve to heat the mixed slurry in the stirring reactor. During this process, the stirring exhaust shaft rotates, driving each stirring exhaust paddle to rotate; S5: When each stirring and exhausting paddle rotates and passes through the lower side of the flipping blade, the water flow driven by the stirring and exhausting paddle pushes the bent bottom wall and the vertical rod upward once, and the upwardly moved vertical rod is then pressed downward by the reset spring to reset; S6: The liquid delivery pump is turned on to discharge the mixed slurry in the stirred reactor.

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