Novel composite material processing technology based on retired wind power blade and PVC material

Abstract

The invention relates to the technical field of wind power blade recycling and reusing, in particular to a novel composite material processing technology based on an out-of-service wind power blade and a PVC material, and the novel composite material processing technology comprises the steps that 1, wind power blade powder and the PVC material are conveyed into a mixing machine to be evenly mixed; 2, the materials in the temporary storage bin are conveyed into a flat double granulator, a granulator is started to conduct granulation, and meanwhile a first-stage air feeder is started to blow particles into a first-stage cyclone separator through a first-stage air conveying pipe; thirdly, the particles in the first-stage cyclone separator are blown into a second-stage cyclone separator through a second-stage air supply fan by means of a second-stage air supply pipe, and then the particles in the second-stage cyclone separator are blown into a third-stage cyclone separator through a third-stage air supply fan by means of a third-stage air supply pipe; 4, a third spiral feeding machine is started to convey the particles in the third-stage cyclone separator to an extruder for extrusion molding, and the particles are cooled and shaped through a shaping platform; and fifthly, the shaped product is cut into independent products through a cutting machine.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade recycling technology, specifically a novel composite material processing technology based on retired wind turbine blades and PVC materials. Background Technology

[0002] Wind turbine blades pose the biggest challenge to decommissioned wind turbines in the wind power industry. The blade matrix material is epoxy resin, which cannot be reused after curing, while glass fiber is cured within the fiber body, making recycling extremely difficult. However, these wind turbine blades can be recycled and ground into powder, then mixed with PVC materials to produce recycled plastics, which can effectively achieve the recycling and reuse of decommissioned wind turbine blades. Therefore, we propose a novel composite material processing technology based on decommissioned wind turbine blades and PVC materials. Summary of the Invention

[0003] The purpose of this invention is to provide a novel composite material processing technology based on decommissioned wind turbine blades and PVC materials, to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a novel composite material processing technology based on decommissioned wind turbine blades and PVC materials, comprising:

[0004] Step 1: Start the screw conveyor to transport the wind turbine blade powder and PVC material in the storage silo to the mixer for uniform mixing, and then discharge the uniformly mixed material into the temporary storage silo.

[0005] Step 2: Start the screw conveyor to transport the material in the temporary storage silo to the flat double granulator, and start the pelletizer to pelletize. At the same time, start the primary air blower to blow the pellets through the primary air conveying pipe to the primary cyclone separator.

[0006] Step 3: The secondary air supply fan blows the particles from the primary cyclone separator into the secondary cyclone separator through the secondary air supply pipe, and then the tertiary air supply fan blows the particles from the secondary cyclone separator into the tertiary cyclone separator through the tertiary air supply pipe.

[0007] Step 4: Start the screw feeder to transport the particles from the three-stage cyclone separator to the extruder for extrusion molding, and then cool and shape them through the shaping platform;

[0008] Step 5: The shaped product is then cut into individual products by a cutting machine.

[0009] Preferably, the discharge end of the flat double granulator is fixed with a cover, and the discharge end of the flat double granulator is located inside the cover. The upper end of the cover is fixed and connected to the quick-cooling pipe, and the upper end of the quick-cooling pipe is connected to the inlet end of the primary air conveying pipe.

[0010] Preferably, a cover is fitted and fixedly connected to the outer wall of the quick-cooling pipe, and both ends of the cover are closed. A gap is left between the inner wall of the cover and the outer wall of the quick-cooling pipe. The upper end of the side wall of the cover is fixed and connected to the air inlet pipe, and the air inlet port of the air inlet pipe is provided with a filter cover.

[0011] Preferably, a number of annular heat sinks are fixed at equal intervals from top to bottom on the outer peripheral wall of the quick-cooling pipe located inside the casing, and a number of retaining rings are fixed at equal intervals from top to bottom on the inner wall of the casing, with the retaining rings and annular heat sinks being arranged alternately.

[0012] Preferably, the inlet end of the primary air blower is connected to the upper end of the water-cooled dust collector via air pipe two. A perforated pipe assembly is fixed on the inner wall of the water-cooled dust collector, and the perforated pipe assembly is connected to the lower end of the cover via air pipe one. A refrigeration component and a circulating pump are fixed at the bottom of the water-cooled dust collector. The inlet end of the circulating pump is connected to the lower end of the interior of the water-cooled dust collector via water pipe one, and the outlet end of the circulating pump is connected to the inlet end of the refrigeration component. The outlet end of the refrigeration component is connected to the lower end of the interior of the water-cooled dust collector via water pipe two.

[0013] Preferably, the pelletizer includes a motor and a gearbox. A tube shaft is rotatably connected through and fixed to the gearbox. The gearbox is fixed to the cover. The motor is fixed to the gearbox. One end of the tube shaft passes through the side wall of the cover and is located inside the cover. The tube shaft is coaxially arranged with the discharge end of the flat double pelletizer. The tube shaft rotates on the side wall of the cover. The output shaft end of the motor is coaxially fixedly connected to a gear one. The gear one is rotatably connected inside the gearbox. A section of the tube shaft located inside the gearbox is coaxially fixedly connected to a gear two. The gear one and gear two are meshed together.

[0014] Preferably, the air outlet of the primary air blower is connected to one end of a tee via an air pipe three. The two air outlet ports of the tee are connected to air pipe four and air pipe five respectively. Air pipe four is connected to the lower end of the cover and is equipped with a check valve. Air pipe five is connected to a connecting sleeve, and the sleeve is fitted and rotatably connected to the end of the pipe shaft located outside the cover. The sleeve is fixed to the outer wall of the gearbox.

[0015] Preferably, a plurality of knife holders are fixed at one end of the tube shaft pointing towards the discharge end of the flat double granulator. The plurality of knife holders are arranged at equal intervals along the circumference, and a cutter is slidably connected on the knife holder. The cutting edge of the cutter is in contact with the discharge end face of the flat double granulator. A nozzle is fixed on the knife holder, and the nozzle is connected to the inside of the side wall of the tube shaft through an air pipe. The spray direction of the nozzle is towards the cutter.

[0016] Preferably, a shaft bracket is fixed on the inner wall of the tube shaft, and a reciprocating lead screw is rotatably connected to the shaft bracket. The end of the reciprocating lead screw away from the tool holder is coaxially fixed to the impeller. A slider is slidably connected to the reciprocating lead screw. The slider is slidably connected to the slide plate one through a connecting rod, and the slide plate one is slidably connected to the inner wall of the tube shaft. The connection position between the air tube six and the tube shaft is located between the slide plate one and the impeller.

[0017] Preferably, a column is fixed and connected to one end of the tube shaft pointing towards the discharge end of the flat double granulator, and multiple sliding cylinders corresponding to the cutters are fixed and connected to the outer peripheral wall of the column. A sliding plate is slidably connected inside the sliding cylinder, and the sliding plate is fixedly connected to the corresponding cutter through a push-pull rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In this invention, recycled wind turbine blade powder and PVC material are mixed, extruded and granulated, and after three-stage separation and cooling, the mixture is extruded and shaped by an extruder. Finally, the product is cooled, shaped and cut, thereby realizing the recycling and reuse of retired wind turbine blades, which greatly improves resource utilization efficiency, reduces environmental impact and increases employment opportunities. Attached Figure Description

[0020] Figure 1 This is a process flow diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall assembly structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the cover and water-cooled dust removal box in this invention;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0025] Figure 6 for Figure 4 Enlarged structural diagram at point C;

[0026] Figure 7 for Figure 6 Schematic diagram of the DD section structure.

[0027] In the diagram: 1. Storage silo; 2. Screw feeder I; 3. Mixer; 4. Temporary storage silo; 5. Screw feeder II; 6. Flat double granulator; 7. Cover; 8. Pelletizer; 9. Primary air blower; 10. Primary air conveying pipe; 11. Primary cyclone separator; 12. Secondary air blower; 13. Secondary air conveying pipe; 14. Secondary cyclone separator; 15. Tertiary air blower; 16. Tertiary air conveying pipe; 17. Tertiary cyclone separator; 18. Screw feeder III; 19. Extruder; 20. Shaping platform; 21. Cutting machine; 22. Quick cooling pipe; 23. Cover; 24. Air inlet pipe; 25. Air pipe I; 26. Water-cooled dust collector; 27. Orifice tube assembly. 28. Refrigeration components; 29. ​​Circulating pump; 30. Water pipe 1; 31. Water pipe 2; 32. Gas pipe 2; 33. Gas pipe 3; 34. T-junction; 35. Gas pipe 4; 36. Check valve; 37. Gas pipe 5; 38. Motor; 39. Gearbox; 40. Gear 1; 41. Gear 2; 42. Pipe shaft; 43. Cover; 44. Shaft bracket; 45. Reciprocating lead screw; 46. Impeller; 47. Slider; 48. Connecting rod; 49. Slide plate 1; 50. Knife holder; 51. Cutter; 52. Gas pipe 6; 53. Nozzle; 54. Column cylinder; 55. Slide cylinder; 56. Slide plate 2; 57. Push-pull rod; 58. Filter cover; 59. Retaining ring; 60. Annular heat sink. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 7 This invention provides a technical solution: a novel composite material processing technology based on decommissioned wind turbine blades and PVC materials, comprising:

[0030] Step 1: Start the screw feeder 2 to transport the wind turbine blade powder and PVC material in the storage bin 1 to the mixer 3 for uniform mixing, and then discharge the uniformly mixed material into the temporary storage bin 4.

[0031] Step 2: Start the screw conveyor 5 to transport the material in the temporary storage bin 4 to the flat double granulator 6, and start the pelletizer 8 to pelletize. At the same time, start the primary air blower 9 to blow the pellets through the primary air conveying pipe 10 to the primary cyclone separator 11. The pellets are initially cooled in the primary air conveying pipe 10, and the primary cyclone separator 11 can separate most of the air and the dust carried in the air.

[0032] Step 3: The secondary air blower 12 blows the particles from the primary cyclone separator 11 through the secondary air delivery pipe 13 to the secondary cyclone separator 14. The particles undergo efficient cooling in the secondary air delivery pipe 13 and are further separated from the conveying air. After secondary separation, the particles are basically cooled. Then, the tertiary air blower 15 blows the particles from the secondary cyclone separator 14 through the tertiary air delivery pipe 16 to the tertiary cyclone separator 17. After three stages of separation, the particles are finally separated from the air, and dust in the air is removed. This three-stage staged cooling method is highly efficient and prevents hot particles from entering the air. The agglomeration and clumping of particles ensures both appearance and internal quality. It also avoids the need for high-power fans and high air pressure required for single-stage long-distance conveying, reducing energy consumption and equipment requirements. Furthermore, due to the shorter high-temperature section pipes, particles do not remain in long pipes for too long before being fully cooled, reducing the risk of melting, agglomeration, and blockage. The three-stage segmented cooling design is more adaptable to complex factory layouts, allowing particles to be conveyed to silos at greater distances or on different floors. It also effectively removes dust and fine powder, improving product purity. When the first stage malfunctions (such as a temporary blockage), the second and third stages can continue to operate, buffering the impact.

[0033] Step 4: Start the screw feeder 18 to transport the particles in the three-stage cyclone separator 17 to the extruder 19 for extrusion molding, and then cool and shape them through the shaping platform 20.

[0034] Step 5: After shaping, the product is cut into individual products by the cutting machine 21, realizing the recycling and reuse of retired wind turbine blades, thereby greatly improving resource utilization efficiency, reducing environmental impact, and increasing employment opportunities.

[0035] In this embodiment, a cover 7 is fixed to the discharge end of the flat-double granulator 6, and the discharge end of the flat-double granulator 6 is located inside the cover 7. The upper end of the cover 7 is fixed and connected to the quick-cooling pipe 22, and the upper end of the quick-cooling pipe 22 is connected to the inlet end of the primary air conveying pipe 10. A cover 23 is sleeved and fixedly connected to the outer wall of the quick-cooling pipe 22, and both ends of the cover 23 are closed. A gap is left between the inner wall of the cover 23 and the outer wall of the quick-cooling pipe 22. The upper end of the side wall of the cover 23 is fixed and connected to the air inlet pipe 24, and a filter cover 58 is provided at the air inlet port of the air inlet pipe 24. Multiple annular heat dissipation fins 60 are fixed at equal intervals from top to bottom on a section of the outer peripheral wall of the quick-cooling pipe 22 inside the cover 23. Multiple retaining rings 59 are fixed at equal intervals from top to bottom on the inner wall of the cover 23, and the retaining rings 59 and the rings are fixed at equal intervals from top to bottom. The heat sinks 60 are staggered. The inlet of the primary air blower 9 is connected to the upper end of the water-cooled dust collector 26 through air pipe 2 32. The inner wall of the water-cooled dust collector 26 is fixed with a perforated pipe assembly 27, which is connected to the lower end of the cover cylinder 23 through air pipe 1 25. The bottom of the water-cooled dust collector 26 is fixed with a refrigeration component 28 and a circulation pump 29. The inlet of the circulation pump 29 is connected to the lower end of the interior of the water-cooled dust collector 26 through water pipe 1 30, and the outlet of the circulation pump 29 is connected to the inlet of the refrigeration component 28. The outlet of the refrigeration component 28 is connected to the lower end of the interior of the water-cooled dust collector 26 through water pipe 2 31. The pelletizer 8 includes a motor 38 and a reduction gearbox 39. A tube shaft 42 is connected through and rotates on the reduction gearbox 39. The reduction gearbox 39 is fixed to On the cover 7, the motor 38 is fixed on the gearbox 39. One end of the tube shaft 42 passes through the side wall of the cover 7 and is located inside the cover 7. The tube shaft 42 is coaxially set with the discharge end of the flat double granulator 6. The tube shaft 42 rotates on the side wall of the cover 7. The output shaft end of the motor 38 is coaxially fixedly connected to gear 40, and gear 40 is rotatably connected to the gearbox 39. The section of the tube shaft 42 located inside the gearbox 39 is coaxially fixedly connected to gear 41, and gear 40 and gear 41 mesh with each other. The air outlet of the primary air blower 9 is connected to one end of the tee 34 through the air pipe 33. The two air outlet ports of the tee 34 are respectively connected to the air pipe 35 and the air pipe 37. The air pipe 35 is connected to the lower end of the cover 7, and a check valve 36 is installed on the air pipe 35. The passage direction of the return valve 36 points towards the inside of the cover 7, its function is to prevent particles from entering the tee 34. The air pipe 37 is connected to the connecting sleeve 43, and the sleeve 43 is fitted and rotatably connected to the end of the tube shaft 42 located outside the cover 7. The sleeve 43 is fixed on the outer wall of the gearbox 39. Multiple knife holders 50 are fixed at the end of the tube shaft 42 pointing towards the discharge end of the flat double granulator 6. The multiple knife holders 50 are equally spaced along the circumference, and cutters 51 are slidably connected to the knife holders 50. The cutting surface of the cutters 51 is in contact with the discharge end face of the flat double granulator 6. A nozzle 53 is fixed on the knife holder 50, and the nozzle 53 is connected to the inside of the side wall of the tube shaft 42 through the air pipe 52. The spray direction of the nozzle 53 points towards the cutter 51. A shaft bracket 44 is fixed on the inner wall of the tube shaft 42.A reciprocating lead screw 45 is rotatably connected to the shaft bracket 44. One end of the reciprocating lead screw 45, away from the cutter holder 50, is coaxially fixedly connected to an impeller 46. A slider 47 is slidably connected to the reciprocating lead screw 45. The slider 47 is slidably connected to a sliding plate 49 via a connecting rod 48. The sliding plate 49 is slidably connected to the inner wall of the tube shaft 42. The connection between the air pipe 52 and the tube shaft 42 is located between the sliding plate 49 and the impeller 46. One end of the tube shaft 42 pointing towards the discharge end of the flat double granulator 6 is fixedly connected to a column cylinder 54. Multiple sliding cylinders 55, corresponding one-to-one with the cutter 51, are fixedly connected to the outer peripheral wall of the column cylinder 54. A second sliding plate 56 is slidably connected inside the sliding cylinder 55, and the second sliding plate 56 is fixedly connected to the corresponding cutter 51 via a push-pull rod 57.

[0036] In the above embodiment, after the motor 38 starts working, it drives the tube shaft 42 to rotate through gear 1 40 and gear 2 41, so that the tube shaft 42 drives the cutter 51 to rotate through the cutter holder 50, so that the cutter 51 cuts the material extruded from the outlet end of the flat double granulator 6 into granules. At the same time, the primary air blower 9 delivers high-speed air to the air pipe 4 35 and air pipe 5 37 through the air pipe 3 33 and the three-way valve 34. After the high-speed air enters the cover 7 through the air pipe 4 35, it carries the cut-off particles into the rapid cooling pipe 22, so that the high-speed air initially cools the hot particles. In addition, the annular heat sink 60 on the outer wall of the rapid cooling pipe 22 increases the heat dissipation efficiency, avoids the hot particles from sticking to the wall and accumulating in the primary air conveying pipe 10, and ensures the granulation quality.

[0037] High-speed air from air pipe 37 enters the tube shaft 42 and then enters the nozzle 53 through air pipe 6 52. The nozzle 53 sprays air onto the cutter 51, quickly blowing away the hot particles and preventing them from adhering to the cutter 53. Simultaneously, the airflow within the tube shaft 42 drives the impeller 46 to rotate, which in turn drives the reciprocating screw 45. This causes the reciprocating screw 45 to move the slider 47 back and forth along the axial direction within the tube shaft 42. The slider 47, through the connecting rod 48, drives the slide plate 49 to move back and forth along the axial direction within the tube shaft 42. This causes the slide plate 49 to alternately generate compression and suction forces within the cylinder 54. These compression and suction forces cause the slide plate 56 to slide back and forth on the cutter holder 50 via the push-pull rod 57, preventing material from being cut at the same position on the cutter 51, thus extending the cutter 51's service life and preventing prolonged contact with hot particles adhering to the extruded material.

[0038] While supplying air, the primary air blower 9 simultaneously draws in low-temperature air from the water-cooled dust collector 26 through air pipe 22. This allows external air to enter the casing 23 through the inlet pipe 24, then through air pipe 1 25 into the perforated pipe group 27, and finally through the small holes on the perforated pipe group 27 to be output into the water. The air then gathers upwards and is drawn out by air pipe 22. After entering the casing 23, the external air carries away the heat emitted by the rapid cooling pipe 22, thus cooling the rapid cooling pipe 22 and accelerating the cooling of hot particles. Multiple annular heat sinks 60 further enhance the heat dissipation efficiency, and when used in conjunction with multiple baffle rings 59, they can increase the airflow within the casing 23. The air intake pipe 24 has a filter cover 58 that filters out impurities. After the air is cooled by the heat dissipated ...

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention 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 the invention 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 the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A novel composite material processing technology based on decommissioned wind turbine blades and PVC materials, characterized in that: include: Step 1: Start the screw feeder (2) to transport the wind turbine blade powder and PVC material in the storage bin (1) to the mixer (3) for uniform mixing, and then discharge the uniformly mixed material into the temporary storage bin (4); Step 2: Start the screw feeder (5) to transport the material in the temporary storage bin (4) to the flat double granulator (6), and start the pelletizer (8) to pelletize. At the same time, start the primary air blower (9) to blow the pellets through the primary air conveying pipe (10) to the primary cyclone separator (11). Step 3: The secondary air blower (12) blows the particles in the primary cyclone separator (11) through the secondary air delivery pipe (13) to the secondary cyclone separator (14), and then the tertiary air blower (15) blows the particles in the secondary cyclone separator (14) through the tertiary air delivery pipe (16) to the tertiary cyclone separator (17); Step 4: Start the screw feeder (18) to transport the particles in the three-stage cyclone separator (17) to the extruder (19) for extrusion molding, and then cool and shape them through the shaping platform (20); Step 5: The shaped product is cut into individual products by a cutting machine (21).

2. The novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 1, characterized in that: The discharge end of the flat double granulator (6) is fixed with a cover (7), and the discharge end of the flat double granulator (6) is located inside the cover (7). The upper end of the cover (7) is fixed and connected to the quick-cooling pipe (22), and the upper end of the quick-cooling pipe (22) is connected to the inlet end of the primary air conveying pipe (10).

3. The novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 2, characterized in that: The outer wall of the quick-cooling pipe (22) is fitted with and fixedly connected to the cover (23), and both ends of the cover (23) are closed. There is a gap between the inner wall of the cover (23) and the outer wall of the quick-cooling pipe (22). The upper end of the side wall of the cover (23) is fixed and connected to the air inlet pipe (24), and the air inlet port of the air inlet pipe (24) is provided with a filter cover (58).

4. The novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 3, characterized in that: The rapid cooling tube (22) has multiple annular heat sinks (60) fixed at equal intervals from top to bottom on a section of the outer peripheral wall inside the cover (23). Multiple retaining rings (59) are fixed at equal intervals from top to bottom on the inner wall of the cover (23), and the retaining rings (59) and the annular heat sinks (60) are staggered.

5. The novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 3, characterized in that: The inlet end of the primary air blower (9) is connected to the upper end of the water-cooled dust collector (26) through air pipe two (32). A perforated pipe group (27) is fixed on the inner wall of the water-cooled dust collector (26), and the perforated pipe group (27) is connected to the lower end of the cover (23) through air pipe one (25). A refrigeration component (28) and a circulation pump (29) are fixed at the bottom of the water-cooled dust collector (26). The inlet end of the circulation pump (29) is connected to the lower end of the interior of the water-cooled dust collector (26) through water pipe one (30). The outlet end of the circulation pump (29) is connected to the inlet end of the refrigeration component (28). The outlet end of the refrigeration component (28) is connected to the lower end of the interior of the water-cooled dust collector (26) through water pipe two (31).

6. The novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 2, characterized in that: The pelletizer (8) includes a motor (38) and a gearbox (39). A tube shaft (42) is connected through and rotatably on the gearbox (39). The gearbox (39) is fixed on the cover (7). The motor (38) is fixed on the gearbox (39). One end of the tube shaft (42) passes through the side wall of the cover (7) and is located inside the cover (7). The tube shaft (42) is coaxially arranged with the discharge end of the flat double pelletizer (6). The tube shaft (42) rotates on the side wall of the cover (7). The output shaft end of the motor (38) is coaxially fixedly connected to a gear one (40). The gear one (40) is rotatably connected inside the gearbox (39). A section of the tube shaft (42) located inside the gearbox (39) is coaxially fixedly connected to a gear two (41). The gear one (40) and the gear two (41) are meshed together.

7. A novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 6, characterized in that: The outlet of the primary air blower (9) is connected to one end of a tee (34) via an air pipe three (33). The two outlet ports of the tee (34) are connected to an air pipe four (35) and an air pipe five (37) respectively. The air pipe four (35) is connected to the lower end of the cover (7), and a check valve (36) is provided on the air pipe four (35). The air pipe five (37) is connected to a connecting sleeve (43), and the sleeve (43) is fitted and rotatably connected to the end of the pipe shaft (42) located outside the cover (7). The sleeve (43) is fixed on the outer wall of the gearbox (39).

8. A novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 7, characterized in that: Multiple blade holders (50) are fixed at one end of the tube shaft (42) pointing towards the discharge end of the flat double granulator (6). The multiple blade holders (50) are arranged at equal intervals along the circumference, and a cutter (51) is slidably connected on the blade holder (50). The cutting edge of the cutter (51) is in contact with the discharge end face of the flat double granulator (6). A nozzle (53) is fixed on the blade holder (50), and the nozzle (53) is connected to the inside of the side wall of the tube shaft (42) through the air pipe (52). The spray direction of the nozzle (53) is pointing towards the cutter (51).

9. A novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 8, characterized in that: A shaft bracket (44) is fixed on the inner wall of the tube shaft (42), and a reciprocating lead screw (45) is rotatably connected to the shaft bracket (44). The end of the reciprocating lead screw (45) away from the tool holder (50) is coaxially fixedly connected to the impeller (46). A slider (47) is slidably connected to the reciprocating lead screw (45). The slider (47) is slidably connected to the slide plate (49) through the connecting rod (48), and the slide plate (49) is slidably connected to the inner wall of the tube shaft (42). The connection position of the air tube (52) and the tube shaft (42) is located between the slide plate (49) and the impeller (46).

10. A novel composite material processing technology based on decommissioned wind turbine blades and PVC materials according to claim 9, characterized in that: The tube shaft (42) is fixed to one end of the discharge end of the flat double granulator (6) and connected to a column cylinder (54). Multiple sliding cylinders (55) corresponding to the cutter (51) are fixed and connected to the outer peripheral wall of the column cylinder (54). A sliding plate (56) is slidably connected inside the sliding cylinder (55), and the sliding plate (56) is fixedly connected to the corresponding cutter (51) through a push-pull rod (57).

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