Secondary recovery treatment process and treatment equipment for wind power blade demolding cloth

Abstract

The invention relates to the technical field of non-solid waste recovery, and provides a secondary recovery treatment process and treatment equipment for wind power blade demolding cloth, and the treatment process comprises the following specific steps: removing most of epoxy resin on the surface of the demolding cloth in a polishing manner, and removing 90-95% of epoxy resin in the polishing process; the polished demolding cloth is cut into long strips; a chemical agent is added into a hot soaking pool, the long-strip-shaped demolding cloth is put into the hot soaking pool to be soaked, residual epoxy resin and nylon 66 in the demolding cloth are separated after hot soaking, and the epoxy resin is dissolved in the chemical agent; it can be understood that compared with a traditional hot bubble method, the method has the advantages that the efficiency is remarkably improved, the treatment time is shortened, meanwhile, the problem of molecular chain breakage caused by a crushing process is avoided, the material performance is completely reserved, the regenerated nylon 66 can be applied to the high-end fields of automobiles, electronic devices and the like again, and the advantages of high treatment efficiency and material stability are achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of non-solid waste recycling, and more specifically, to a secondary recycling process and processing equipment for wind turbine blade release cloth. Background Art

[0002] Nylon 66 mold release cloth is a key auxiliary material in the wind turbine blade molding process, primarily used to isolate the mold from the composite material. Laying it on the mold surface during blade molding effectively prevents the resin from directly adhering to the mold, ensuring smooth demolding of the blade while reducing wear and chemical corrosion on the mold, thereby extending the mold life. Furthermore, its smooth surface accurately transfers the mold texture to the blade surface, improving blade aerodynamic performance and reducing the need for subsequent polishing. The woven structure of nylon 66 is also breathable, allowing bubbles and volatiles generated during the resin curing process to escape, reducing internal porosity defects. Compared to traditional release agents, the use of mold release cloth simplifies the process steps, eliminating the need for repeated coatings, significantly improving production efficiency and reducing costs. The core advantages of nylon 66 (polyamide 66) release cloth stem from its high-performance engineering plastic properties. First, its high-temperature resistance (melting point approximately 260°C) allows it to withstand the high temperatures (typically 120-180°C) encountered during the curing of epoxy resins, maintaining structural stability. It also exhibits excellent chemical resistance, resisting corrosion from resin solvents and curing agents, preventing swelling or degradation. The material's high tensile strength and abrasion resistance enable it to withstand the mechanical stresses of processes such as layup and vacuum bagging, while its flexibility ensures it conforms to complex curved molds, avoiding surface defects caused by wrinkles. Nylon 66's low adhesion to resins makes it easy to remove after demolding with minimal residue. Nylon 66 release cloth degrades in performance after extended use and needs to be replaced. The surface of the nylon 66 release cloth is coated with epoxy resin, which must be removed to purify the nylon 66 and ensure it meets recycling standards. Common processing methods for nylon 66 release cloth on the market include hot-blister decomposition and crushing and melting followed by granulation. Hot-blistering can ensure the performance of the recycled material, but it is time-consuming and requires repeated rinsing and hot-blistering. Crushing is more efficient than hot-blistering, but it can easily lead to a decrease in material performance, such as molecular chain breakage, and can only be reused for low-end plastic products such as industrial accessories and packaging materials. In order to solve the above problems, this application proposes a secondary recycling process and processing equipment for wind turbine blade release cloth. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a secondary recycling process and processing equipment for wind turbine blade release cloth, which has the effect of improving utilization rate.

[0004] The purpose of this disclosure can be achieved through the following technical solutions: A secondary recycling process for wind turbine blade release cloth, the specific steps are as follows: S1. Use grinding to remove most of the epoxy resin on the surface of the release cloth. The grinding process can remove 90%-95% of the epoxy resin; S2. Cut the polished release cloth into long strips; S3. Add chemicals to the hot bubble pool and soak the long strips of release cloth in the hot bubble pool. After the hot bubble, the epoxy resin and nylon 66 remaining in the release cloth are separated and the epoxy resin is dissolved in the chemical agent. S4. After the hot bubble is completed, the nylon 66 is dried to remove the residual agent and liquid epoxy resin; S5. The purified nylon 66 is melt-extruded through a screw granulator to produce high-purity nylon 66 recycled granules.

[0005] The chemical agent used for hot soaking in step 3 is a mixture of potassium hydroxide, benzyl alcohol, methanol, ethylene glycol, succinic anhydride and water, the ratio of the mixture to water is 4:6, the hot soaking temperature is 80°C-100°C, preferably 90°C, and the soaking time is 23h-25h, preferably 24h; According to the above processing process, the purpose of the present disclosure can also be achieved through the following technical solution: A secondary recycling and processing device for wind turbine blade release cloth, including a stand, and also including: A loading mechanism for lifting the stripping cloth from the ground to the stand; A polishing mechanism provided on a stand and used for polishing the epoxy resin on the surface of the stripping cloth, the polishing mechanism comprising a discharge roller and a take-up roller mounted on the stand via a support and used for unwinding and rewinding the stripping cloth respectively; A cutting mechanism is provided in parallel with the grinding mechanism and is used to cut the ground release cloth into long strips. The cutting mechanism includes a cutting seat mounted on a stand and a cutter located directly above the receiving roller. The cutting seat is equipped with a cutting cylinder that drives the cutter to cut the release cloth on the receiving roller. A hot-bubble mechanism located directly below the cutting mechanism and capable of hot-bubble the long strip of demoulding cloth, wherein a pushing screw blade capable of pushing the demoulding cloth is also provided inside the hot-bubble mechanism; A conveying mechanism connected to the end of the hot bubble mechanism and arranged obliquely, wherein the conveying mechanism can automatically remove the soaked nylon 66 from the hot bubble mechanism; A drying mechanism located at the discharge end of the conveying mechanism and capable of dehydrating nylon 66, the drying mechanism comprising a drying drum that rotates to dry the nylon 66 and a pusher blade fixed to the inner side of the drying drum and used to push the nylon 66, the pusher blade being located in both the pushing box and the drying box; A circulation mechanism is connected between the drying mechanism and the hot bubble mechanism, and the circulation mechanism is used to spin out the medicine from the drying mechanism and circulate it into the hot bubble mechanism.

[0006] The feeding mechanism and grinding mechanism in the above technical solution only require low-intensity manual operation, the cutting mechanism can use a switch to control the cutting work once, and the hot soaking mechanism, conveying mechanism, drying mechanism, and circulation mechanism can be automated under the connection of a controller.

[0007] The grinding mechanism also includes a retracting motor for driving the unwinding roller and the receiving roller respectively. A grinding part is provided between the unwinding roller and the receiving roller, and the lower end of the grinding part is mounted on the platform in a lifting manner through a grinding cylinder. In the above technical solution, the polishing cylinder drives the polishing part to rise and fall, which makes it easier for the stripping cloth to pass through the two polishing parts.

[0008] The grinding part includes a grinding seat and a driving roller rotatably mounted in the grinding seat, the grinding seat is further provided with two driven rollers that rotate and are distributed in a triangle with the driving roller, the two driven rollers and one driving roller are externally provided with a grinding belt for grinding, and a grinding motor with an output end fixed to the driving roller is installed on one side of the grinding seat; In the above technical solution, the two grinding belts shown in the figure can fully contact with the release cloth under the support of the triangular structure, thereby ensuring the grinding effect.

[0009] The hot bubble mechanism also includes a hot bubble pool that accommodates a pusher screw blade and chemicals. The pusher screw blade is driven by a pusher motor installed outside the hot bubble pool. An electric heating plate for heating the chemicals is provided at the bottom of the hot bubble pool. A feed hopper is provided on one side of the upper end of the hot bubble pool and is located directly below the receiving roller. A sinking portion is provided at the other end, and a drainage pipe is connected to the bottom of the sinking portion. In the above technical solution, the cross-section of the hot bubble pool is U-shaped and adapted to the pushing screw blade. After the material enters the hot bubble pool through the feed hopper, the rotation of the pushing screw blade can avoid accumulation and at the same time achieve the purpose of feeding, so that the hot bubble mechanism as a whole can be automated.

[0010] The conveying mechanism includes a conveying cylinder connected to the sinking part and a conveying screw blade rotatably arranged inside the conveying cylinder, a water-draining hole is opened in the axial direction on the conveying screw blade, a conveying motor for driving the conveying screw blade is fixed to the outside of the conveying cylinder, and a discharge pipe facing the pushing box is provided near the upper end of the conveying screw blade of the conveying cylinder; In the above technical solution, the bottom of the conveying screw blade is inserted into the sinking part, and when it rotates, it can transport the material from the conveying cylinder from bottom to top, and the hydrophobic hole can control most of the medicine during the conveying process, avoiding increasing the workload of the drying mechanism and the circulation mechanism, while not affecting the conveying effect.

[0011] The push box is integrally installed with the drying box, a drain pipe is provided at the bottom of the drying box and is connected to the circulation mechanism, the drying drum is rotatably connected to the drying box and is provided with a filter hole, a material discharge chute is fixed to one end of the drying box away from the push box, a gear ring is fixed to the outside of the drying drum, and a gear driven by the drying motor and meshing with the gear ring is provided in the drying box; In the above technical solution, the pushing blades can transport the material from the pushing box to the lower trough when rotating slowly. When the drying drum rotates at high speed, the centrifugal force of the material is greater than the gravity. At this time, the material adheres to the inner wall of the drying drum, and the pushing blades act as a barrier to prevent the material from being thrown out axially. The drying drum and the pushing blades cooperate to achieve stable drying and automatic unloading.

[0012] The circulation mechanism includes a raised base and a circulating water pump installed on the raised base, wherein the liquid inlet of the circulating water pump is connected to the drain pipe through a water connection pipe, and the liquid outlet of the circulating water pump is connected to the hot bubble pool through a return pipe; In the above technical solution, quick connectors, flange connectors, etc. can be used to connect the water inlet pipe to the circulating water pump and the drainage pipe. In order to improve the stability of the water inlet pipe, a support rod supported on the ground can be appropriately set. The return pipe is connected to the circulating water pump and the hot bubble mechanism through a connector. The return pipe is connected to the top of the hot bubble pool and communicates with its interior.

[0013] The feeding mechanism includes a feeding rack located on one side of the platform and symmetrically distributed, wherein a screw driven by a feeding motor is provided in the feeding rack, and a feeding plate threadedly matched with the feeding rack is provided between the two feeding racks; The loading mechanism in the above technical solution can lift the demoulding cloth on the ground onto the platform. The platform is provided with an opening opposite to the loading mechanism, and the opening is opposite to the polishing mechanism, which is convenient for taking materials from the loading mechanism and then polishing them directly through the polishing mechanism.

[0014] Beneficial effects of the present disclosure: The present invention can polish away most of the epoxy resin coated on the front and back sides of the release cloth by means of the provided polishing mechanism, and then cut the cloth into pieces by means of the cutting mechanism to facilitate the subsequent removal of the residual epoxy resin on the release cloth. The hot bubble pool and electric heating plate provided in the hot bubble mechanism of the present invention can play a hot bubble role on the release cloth. The chemical agent used for hot bubble is a mixture of potassium hydroxide, benzyl alcohol, methanol, ethylene glycol, succinic anhydride and water. It can remove a small amount of epoxy resin remaining in the release cloth, thereby achieving the purification effect of nylon 66. The present invention provides a conveying mechanism connected between the hot bubble mechanism and the drying mechanism, which can realize automatic conveying without manual intervention, and the hydrophobic holes in the conveying screw blades can control water in the nylon 66 during conveying, thereby preventing a large amount of medicine from being brought into the drying mechanism. The push blades provided in the drying mechanism of the present invention rotate slowly to play a feeding role, and are used to convey nylon 66 from the push box to the drying drum and discharge nylon 66 from the discharge chute. When the drying drum rotates at a high speed, the centrifugal force at this time is greater than the gravity of nylon 66, so it is absorbed by the centrifugal force inside the drying drum and passes through the filter holes to achieve the drying effect. The drying mechanism has the advantages of high degree of automation, practicality and flexibility. The present invention can circulate the separated medicine back to the hot bubble mechanism through the circulation mechanism, forming a complete closed loop with long-term stable operation; In summary, the efficiency of the present invention is greatly improved compared with the single hot soak treatment method, and the treatment time is shortened; and compared with the crushing treatment method, it can better guarantee the material performance and avoid molecular chain breakage. Its excellent performance after regeneration can be reused in high-end fields such as automobiles and electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from a side view; Figure 3 for Figure 1 Rear view structural diagram; Figure 4 for Figure 1 Schematic diagram of the main view structure; Figure 5 This is a schematic diagram of the structure of the grinding mechanism and cutting mechanism installed on the stand in a half-section view; Figure 6 It is a schematic diagram of the structure of the hot bubble mechanism, conveying mechanism, drying mechanism and circulation mechanism in a partially cutaway front view; Figure 7 It is a schematic diagram of the structure of the drying mechanism in a half-section side view; Figure 8 It is a structural diagram of a double drying drum and its fixed connection parts; Figure 9 It is an enlarged structural diagram of the feeding mechanism; Figure 10 for Figure 2 A schematic diagram of the structure of the enlarged part A; In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Stand; 2. Feeding mechanism; 21. Feeding rack; 22. Screw; 23. Feeding motor; 24. Feeding plate; 3. Grinding mechanism; 31. Unwinding roller; 32. Rewinding roller; 33. Rewinding motor; 34. Grinding unit; 341. Grinding seat; 342. Active roller; 343. Driven roller; 344. Grinding belt; 345. Grinding motor; 35. Grinding cylinder; 4. Cutting mechanism; 41. Cutting seat; 42. Cutting knife; 43. Cutting cylinder; 5. Hot bubble mechanism; 51. Hot bubble pool; 52. Pushing screw blade; 53. Pushing motor; 54. Electric heating plate; 55. Feed hopper; 56. Sinking part; 57. Drain pipe; 6. Conveying mechanism; 61. Conveying cylinder; 62. Conveying motor; 63. Conveying screw blade; 631. Drain hole; 64. Feeding pipe; 7. Drying mechanism; 71. Pushing box; 72. Drying box; 721. Drain pipe; 73. Drying drum; 731. Filter hole; 74. Pushing blade; 75. Feed chute; 76. Ring gear; 77. Gear; 78. Drying motor; 8. Circulation mechanism; 81. Raised seat; 82. Circulating water pump; 83. Water connecting pipe; 84. Return pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0018] like Figure 1 - Figure 10 As shown: This embodiment provides a secondary recycling process for wind turbine blade release cloth, the specific steps of which are as follows: S1. Use grinding to remove most of the epoxy resin on the surface of the release cloth. The grinding process can remove 90%-95% of the epoxy resin; S2. The polished release cloth is cut into long strips by a cutting mechanism to improve the efficiency of hot soaking, dehydration, and granulation; S3. Potassium hydroxide, benzyl alcohol, methanol, ethylene glycol, succinic anhydride, and water are mixed to prepare a chemical agent in a ratio of 4:6. The chemical agent is added to a hot soaking tank and a long strip of release cloth is immersed in the hot soaking tank at a temperature of 80°C-100°C for 23h-25h. After the hot soak, the epoxy resin and nylon 66 remaining in the release cloth are separated and the epoxy resin is dissolved in the chemical agent. S4. After the hot bubble is completed, the nylon 66 is dried to remove the residual agent and liquid epoxy resin; S5. The purified nylon 66 is melt-extruded through a screw granulator to produce high-purity nylon 66 recycled granules.

[0019] This embodiment also provides, based on the above nylon 66 processing process, a secondary recycling and processing equipment for wind turbine blade stripping cloth, comprising a stand 1, and also comprising: a feeding mechanism 2 for lifting the stripping cloth from the ground to the stand 1, which reduces the workload of personnel and is safer; a grinding mechanism 3 for grinding epoxy resin on the surface of the stripping cloth is installed on the nylon 66 stand 1, and the grinding mechanism 3 can grind both surfaces of the stripping cloth at the same time to remove most of the epoxy resin; a cutting mechanism 4 arranged in parallel with the grinding mechanism 3 is also installed on the nylon 66 stand 1; a hot foaming mechanism 5 is provided below the nylon 66 cutting mechanism 4, which can hot foam the long strip stripping cloth. Chemical agents are injected into the mechanism 5 to dissolve the residual epoxy resin on the release cloth, thereby purifying the nylon 66; the nylon 66 hot bubble mechanism 5 is connected to an inclined conveying mechanism 6 at one end away from the cutting mechanism 4, and the nylon 66 conveying mechanism 6 can automatically take out the soaked nylon 66 from the hot bubble mechanism 5 and convey it to the drying mechanism 7, and the hot bubble mechanism 5 and the feeding parts in the conveying mechanism 6 can be automatically connected; a drying mechanism 7 for dehydrating the nylon 66 is provided below the end of the nylon 66 conveying mechanism 6, and the drying mechanism 7 and the hot bubble mechanism 5 are provided with a circulation mechanism 8, and the nylon 66 circulation mechanism 8 circulates the agent thrown out of the drying mechanism 7 to the hot bubble mechanism 5.

[0020] As an embodiment of the present disclosure, the nylon 66 feeding mechanism 2 includes a feeding rack 21 located on one side of the platform 1 and symmetrically distributed. The nylon 66 feeding rack 21 is provided with a screw rod 22 driven by a feeding motor 23. A feeding plate 24 threadedly engaged with the feeding rack 21 is provided between the two feeding racks 21. Specifically, the loading plate 24 is lowered to the lowest position, and the demoulding cloth to be processed is placed on the loading plate 24. The loading motors 23 at both ends simultaneously drive the screw rod 22 and the screw thread of the loading rack 21, thereby driving the loading plate 24 to rise to the upper end of the stand 1.

[0021] As an embodiment of the present disclosure, the nylon 66 grinding mechanism 3 includes a feeding roller 31 and a receiving roller 32 which are mounted on the stand 1 through a support and are used for unwinding and rewinding the stripping cloth respectively. The feeding roller 31 adopts an expansion structure and can drive the key bar on the shaft to protrude or retract by means of spiral, air pressure, or oil pressure, thereby positioning the rolled stripping cloth. The receiving roller 32 adopts a clamp-type winding roller or a chuck-type winding roller, which can be fixed at the beginning of the stripping cloth winding to prevent slipping or deviation. The nylon 66 grinding mechanism 3 also includes a retracting and discharging motor 33 for driving the feeding roller 31 and the receiving roller 32 respectively. The nylon 66 feeding roller 31 A grinding portion 34 is provided between the receiving roller 32 and the receiving roller 32, and the lower end grinding portion 34 is installed with the stand 1 in a lifting manner through a grinding cylinder 35. The nylon 66 grinding portion 34 includes a grinding seat 341 and an active roller 342 rotatably installed in the grinding seat 341. The nylon 66 grinding seat 341 is also provided with two rotating driven rollers 343 and distributed in a triangular shape with the active roller 342. The two nylon 66 driven rollers 343 and the one active roller 342 are provided with a grinding belt 344 for grinding outside. A grinding motor 345 with an output end fixed to the active roller 342 is installed on one side of the nylon 66 grinding seat 341; Specifically, the polishing cylinder 35 drives the lower end polishing part 34 to move downward, leaving enough space between the two groups of polishing parts 34, taking the rolled stripping cloth from the loading mechanism 2 and installing it on the unwinding roller 31, passing one end of the stripping cloth between the two polishing parts 34, and then clamping the end of the stripping cloth by the receiving roller 32, the polishing cylinder 35 drives the polishing part 34 to reset upward, and the stripping cloth is confined between the two polishing belts 344, and after the polishing motor 345 is started, it drives the polishing belt 344 to rotate through the active roller 342, thereby polishing the epoxy resin on the surface of the stripping cloth. The driving directions of the polishing motors 345 on the two groups of polishing parts 34 are opposite, and at this time the unwinding roller 31 unwinds under the action of the retracting and discharging motor 33, and the receiving roller 32 rewinds under the action of the retracting and discharging motor 33 until the polishing is completed.

[0022] As an embodiment of the present disclosure, the nylon 66 cutting mechanism 4 includes a cutting seat 41 mounted on the stand 1 and a cutter 42 located directly above the receiving roller 32. The nylon 66 cutting seat 41 is equipped with a cutting cylinder 43 that drives the cutter 42 to cut the demoulding cloth of the receiving roller 32; Specifically, the cutting mechanism 4 is controlled by a switch. After the switch is manually operated, the cutting cylinder 43 drives the cutter 42 to move downward, and the cutter 42 cuts the demoulding cloth wound on the receiving roller 32. The cut demoulding cloth falls from the feed hopper 55 into the hot soaking pool 51 for hot soaking.

[0023] As an embodiment of the present disclosure, the nylon 66 hot bubble mechanism 5 also includes a hot bubble pool 51 that accommodates a pusher screw 52 and a chemical agent. The nylon 66 pusher screw 52 is driven by a pusher motor 53 installed outside the hot bubble pool 51. The bottom of the nylon 66 hot bubble pool 51 is provided with an electric heating plate 54 for heating the chemical agent. A feed hopper 55 is provided on one side of the upper end of the nylon 66 hot bubble pool 51, which is located directly below the receiving roller 32. A sinking portion 56 is provided at the other end. A drain pipe 57 is connected to the bottom of the nylon 66 sinking portion 56. Specifically, the chemical agent is injected into the hot bubble pool 51 and the sinking part 56 through 58, the valve on the drain pipe 57 is in the closed state, the electric heating plate 54 is connected to the temperature controller and is set to 90°C according to the optimal temperature. The demoulding cloth enters the hot bubble pool 51 and is hot-soaked. During the hot-soaking process, as the feed hopper 55 loads the material, the pushing motor 53 drives the pushing screw blade 52 to rotate and move the material to the side of the conveying mechanism 6, and the material will eventually be moved to the sinking part 56.

[0024] As an embodiment of the present disclosure, the nylon 66 conveying mechanism 6 includes a conveying cylinder 61 connected to the sinking portion 56 and a conveying screw 63 rotatably arranged inside the conveying cylinder 61. The nylon 66 conveying screw 63 is provided with a hydrophobic hole 631 along the axial direction. A conveying motor 62 for driving the conveying screw 63 is fixed to the outside of the nylon 66 conveying cylinder 61. A discharge pipe 64 facing the pushing box 71 is provided near the upper end of the conveying screw 63 of the nylon 66 conveying cylinder 61. Specifically, when the nylon 66 that has been soaked to the standard in the hot soaking mechanism 5 needs to be dehydrated through the drying mechanism 7, the conveying motor 62 drives the conveying screw 63 to rotate, and the conveying screw 63 conveys the nylon 66 in the sinking part 56 upward along the conveying cylinder 61 through rotation. During the conveying process, the hydrophobic holes 631 can achieve a hydrophobic effect. The conveyed nylon 66 falls into the pushing box 71 through the discharge pipe 64. After conveying the appropriate amount, the conveying mechanism 6 stops and the drying mechanism 7 performs dehydration.

[0025] As an embodiment of the present disclosure, the nylon 66 drying mechanism 7 includes a drying drum 73 for drying nylon 66 by rotation and a pushing blade 74 fixed to the inner side of the drying drum 73 and used to push the nylon 66. The nylon 66 pushing blade 74 is located in both the pushing box 71 and the drying box 72. The nylon 66 pushing box 71 is installed integrally with the drying box 72. A drain pipe 721 is provided at the bottom of the nylon 66 drying box 72 and is connected to the circulation mechanism 8. The nylon 66 drying drum 73 is rotatably connected to the drying box 72 and is provided with a filter hole 731. A discharge chute 75 is fixed to the end of the nylon 66 drying box 72 away from the pushing box 71. A gear ring 76 is fixed to the outside of the nylon 66 drying drum 73. A gear 77 driven by a drying motor 78 and meshing with the gear ring 76 is provided in the nylon 66 drying box 72. Specifically, when nylon 66 enters the pushing box 71, the drying motor 78 works slowly at this time, and the meshing of the gear 77 and the ring gear 76 drives the drying drum 73 and the pushing blade 74 to rotate. The pushing blade 74 pushes the nylon 66 into the drying drum 73, and then the drying motor 78 accelerates. At this time, the centrifugal force on the nylon 66 in the drying drum 73 is greater than the gravity and the thrust of the pushing blade 74, and it adheres to the inner wall of the drying drum 73. The high-speed rotating drying drum 73 throws the moisture in the nylon 66 out through the filter hole 731 and into the drying box 72. After dehydration is completed, the drying motor 78 slows down. At this time, the centrifugal force is very small, and the dehydrated nylon 66 is discharged out through the discharge chute 75 under the push of the pushing blade 74. The feed end of the screw extruder can be directly placed below the discharge chute 75 for direct melt granulation.

[0026] As an embodiment of the present disclosure, the nylon 66 circulation mechanism 8 includes a raised seat 81 and a circulating water pump 82 mounted on the raised seat 81. The liquid inlet of the nylon 66 circulating water pump 82 is connected to the drain pipe 721 through a water connection pipe 83, and the liquid outlet of the nylon 66 circulating water pump 82 is connected to the hot bubble pool 51 through a return pipe 84. Specifically, when the circulating water pump 82 is working, it extracts the medicine thrown out of the drying box 72 through the water pipe 83 and the drain pipe 721, and then returns it to the hot bubble pool 51 through the return pipe 84 to achieve the purpose of recycling.

[0027] As can be understood, the present invention achieves efficient purification of nylon 66 by polishing away most of the epoxy resin on both sides of the release cloth, followed by slitting. This process, combined with a hot-soaking treatment, uses a specific chemical mixture to remove residual resin. The conveying process utilizes an automated water control design to reduce chemical residue, while the drying phase achieves efficient dehydration through low-speed feeding and high-speed centrifugal separation. The integrated chemical circulation system also forms a closed-loop processing flow. Compared to traditional hot-soaking methods, this significantly improves efficiency and shortens processing time, while avoiding the molecular chain breakage caused by the crushing process and fully preserving material properties. The regenerated nylon 66 can be reused in high-end applications such as automotive and electronic devices, combining the advantages of high processing efficiency and material stability.

[0028] In the description of the present disclosure, unless otherwise specified, “plurality” means two or more; it should be understood that the terms “opening”, “upper”, “lower”, “thickness”, “top”, “middle”, “length”, “inside”, “all around”, etc., which indicate orientation or positional relationships, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A secondary recycling process for wind turbine blade release cloth, characterized in that: The specific steps are as follows: S1. Use grinding to remove most of the epoxy resin on the surface of the release cloth. The grinding process can remove 90%-95% of the epoxy resin; S2. Cut the polished release cloth into long strips; S3. Add chemicals to the hot bubble pool and soak the long strips of release cloth in the hot bubble pool. After the hot bubble, the epoxy resin and nylon 66 remaining in the release cloth are separated and the epoxy resin is dissolved in the chemical agent. S4. After the hot bubble is completed, the nylon 66 is dried to remove the residual agent and liquid epoxy resin; S5. The purified nylon 66 is melt-extruded through a screw granulator to produce high-purity nylon 66 recycled granules.

2. The secondary recycling process for wind turbine blade release cloth according to claim 1, characterized in that: The chemical agent used for hot soaking in step 3 is a mixture of potassium hydroxide, benzyl alcohol, methanol, ethylene glycol, succinic anhydride and water, the ratio of the mixture to water is 4:6, the hot soaking temperature is 80°C-100°C, and the soaking time is 23h-25h.

3. A secondary recycling and processing equipment for wind turbine blade release cloth, comprising a processing process according to any one of claims 1 to 3, characterized in that: Also includes: A loading mechanism for lifting the stripping cloth from the ground to the stand; A polishing mechanism provided on a stand and used for polishing the epoxy resin on the surface of the stripping cloth, the polishing mechanism comprising a discharge roller and a take-up roller mounted on the stand via a support and used for unwinding and rewinding the stripping cloth respectively; A cutting mechanism is provided in parallel with the grinding mechanism and is used to cut the ground release cloth into long strips. The cutting mechanism includes a cutting seat mounted on a stand and a cutter located directly above the receiving roller. The cutting seat is equipped with a cutting cylinder that drives the cutter to cut the release cloth on the receiving roller. A hot-bubble mechanism located directly below the cutting mechanism and capable of hot-bubble the long strip of demoulding cloth, wherein a pushing screw blade capable of pushing the demoulding cloth is also provided inside the hot-bubble mechanism; A conveying mechanism connected to the end of the hot bubble mechanism and arranged obliquely, wherein the conveying mechanism can automatically remove the soaked nylon from the hot bubble mechanism; A drying mechanism located at the discharge end of the conveying mechanism and capable of dehydrating the nylon, the drying mechanism comprising a drying drum that rotates to dry the nylon and a pusher blade fixed to the inner side of the drying drum and used to push the nylon, the pusher blade being located in both the pushing box and the drying box; A circulation mechanism is connected between the drying mechanism and the hot bubble mechanism, and the circulation mechanism is used to spin out the medicine from the drying mechanism and circulate it into the hot bubble mechanism.

4. The wind turbine blade release cloth secondary recycling and processing equipment according to claim 3, characterized in that: The grinding mechanism also includes a retracting motor for driving the discharge roller and the receiving roller respectively. A grinding part symmetrically arranged up and down is provided between the discharge roller and the receiving roller. The lower end grinding part is installed on the platform in a lifting manner through a grinding cylinder.

5. The secondary recycling and processing equipment for wind turbine blade release cloth according to claim 4, characterized in that: The grinding part includes a grinding seat and an active roller rotatably installed in the grinding seat. The grinding seat is also provided with two rotating driven rollers distributed in a triangle with the active roller. The two driven rollers and one active roller are provided with grinding belts for grinding on the outside. A grinding motor with an output end fixed to the active roller is installed on one side of the grinding seat.

6. The secondary recycling and processing equipment for wind turbine blade release cloth according to claim 3, characterized in that: The hot bubble mechanism also includes a hot bubble pool that accommodates a pushing screw blade and chemicals. The pushing screw blade is driven by a pushing motor installed outside the hot bubble pool. An electric heating plate for heating chemicals is provided at the bottom of the hot bubble pool. A feed hopper is provided on one side of the upper end of the hot bubble pool and is located directly below the receiving roller. A sinking part is provided at the other end, and a drainage pipe is connected to the bottom of the sinking part.

7. The secondary recycling and processing equipment for wind turbine blade release cloth according to claim 3, characterized in that: The conveying mechanism includes a conveying cylinder connected to the sinking part and a conveying screw blade rotatably arranged inside the conveying cylinder. A water-draining hole is opened axially on the conveying screw blade. A conveying motor for driving the conveying screw blade is fixed to the outside of the conveying cylinder. The conveying cylinder is provided with a discharge pipe facing the pushing box near the upper end of the conveying screw blade.

8. The secondary recycling and processing equipment for wind turbine blade release cloth according to claim 3, characterized in that: The pushing box is installed integrally with the drying box, a drainage pipe is provided at the bottom of the drying box and is connected to the circulation mechanism, the drying drum is rotatably connected to the drying box and is provided with filter holes, a discharge trough is fixed to the end of the drying box away from the pushing box, a gear ring is fixed to the outside of the drying drum, and a gear driven by the drying motor and meshing with the gear ring is provided in the drying box.

9. The wind turbine blade release cloth secondary recycling and processing equipment according to claim 3, characterized in that: The circulation mechanism includes a raised seat and a circulating water pump installed on the raised seat. The liquid inlet end of the circulating water pump is connected to the drain pipe through a water connecting pipe, and the liquid outlet end of the circulating water pump is connected to the hot bubble pool through a return pipe.

10. The secondary recycling and processing equipment for wind turbine blade release cloth according to claim 3, characterized in that: The feeding mechanism includes a feeding rack located on one side of the platform and symmetrically distributed, a screw driven by a feeding motor is provided in the feeding rack, and a feeding plate that cooperates with the thread of the feeding rack is provided between the two feeding racks.

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