A waste wind turbine blade resource recycling equipment and process

Abstract

The present invention belongs to the field of plastic recycling technology, and specifically relates to a waste wind turbine blade resource utilization equipment and process, including: a crushing mechanism, a sorting mechanism, a pyrolysis mechanism, a cooling mechanism and an air supply mechanism, the sorting mechanism includes: a first frame, a sorting component, a cyclone dust collector, and a mixing screw conveyor, the sorting component is arranged inside the first frame, the first frame is connected to the pyrolysis mechanism through the mixing screw conveyor, the cyclone dust collector is fixedly installed on the mixing screw conveyor, the air inlet of the mixing screw conveyor is connected to the first frame, and the pyrolysis mechanism is connected to the cooling mechanism. The present invention can sort the material particles generated after the wind turbine blades are crushed by cooperating with the crusher and the sorting mechanism, separate the sandwich material before pyrolysis, and realize independent recovery of the sandwich material. The equipment feeding and discharging are both realized by using a screw conveyor, which can realize automatic blocking and isolation, and effectively prevent nitrogen and some particles and debris from diffusing out of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of recycled plastics, and in particular relates to a device and a process for recycling waste wind turbine blades. Background Art

[0002] In recent years, the rapid rise of my country's wind power industry has not only demonstrated the potential for widespread application of clean energy, but also triggered environmental and resource challenges in the decommissioning of wind turbine blades. Wind turbine blades, as the core components of wind turbines, are usually designed to last 15 to 20 years. With the surge in wind power installed capacity, the number of retired blades is expected to grow exponentially in the future, forming an urgent problem of "white waste" disposal, causing potential pollution to the environment, and also means the idleness of huge resources.

[0003] At present, the global treatment strategies for retired wind turbine blades mainly include landfill, incineration and resource recycling. Among them, although incineration can recover some heat, it has the disadvantages of low utilization rate and possible generation of harmful substances. Resource recycling, through crushing, pyrolysis, cooling and other processes, aims to extract reusable materials in the blades, such as plastics, glass fibers, carbon fibers and their composite materials, to achieve the goal of circular economy, but the application of this technology is still in its infancy.

[0004] However, the rapid iteration of wind turbine blade materials, especially the transition of core materials from traditional balsa wood to new plastics such as polyurethane, has put forward higher requirements for existing resource processing technologies. Existing equipment and processes cannot separate this part of the core material before pyrolysis separation of plastics and various fibers. The final material contains impurities, which leads to a decrease in the quality of recycled materials, and ignores the independent recycling value of the core material, thus exacerbating the problem of resource waste.

[0005] Therefore, it is necessary to study a waste wind turbine blade resource recycling equipment and process that can be applied to the resource recycling of various wind turbine blades and can separate and reuse various recyclable materials. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a waste wind turbine blade resource utilization equipment and process, which is used to solve the problem that the existing equipment and processes in the prior art cannot separate this part of the core material before pyrolysis separation of plastics and various fibers, and the final material contains impurities that lead to the decline in the quality of the recycled material, and ignores the independent recovery value of the core material, thereby exacerbating the problem of resource waste.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A waste wind turbine blade resource recovery device, characterized in that it comprises: a crushing mechanism, a sorting mechanism, a pyrolysis mechanism, a cooling mechanism and an air supply mechanism;

[0009] The crushing mechanism comprises a crusher and a first screw conveyor, and the crusher is connected to the sorting mechanism through the first screw conveyor;

[0010] The sorting mechanism comprises: a first frame, a sorting component, a cyclone dust collector, and a mixing screw conveyor, wherein the first frame is a hollow closed box, the sorting component is arranged inside the first frame, the first frame is connected to the pyrolysis mechanism through the mixing screw conveyor, the cyclone dust collector is fixedly mounted on the mixing screw conveyor, the air inlet of the mixing screw conveyor is connected to the first frame, and the dust outlet is connected to the mixing screw conveyor;

[0011] The side of the pyrolysis mechanism away from the sorting mechanism is connected to the cooling mechanism.

[0012] Furthermore, the first frame is provided with a first feed port, a first discharge trough and a second discharge trough, the first feed port is arranged at the top of the first frame, and the first discharge trough and the second discharge trough are arranged on one side of the first frame close to the pyrolysis mechanism.

[0013] Furthermore, the sorting assembly includes a vibration bracket, a spring, a sorting plate, a first air distribution assembly, a second air distribution assembly, and a vibration assembly. The upper end surface of the vibration bracket is an inclined surface. The sorting plate is fixedly mounted on the vibration bracket. There is a gap between the sorting plate and the inclined surface of the vibration bracket. The first air distribution assembly is fixedly connected to the middle position of the inclined surface. The second air distribution assembly is fixedly connected to the inclined surface and is located on both sides of the first air distribution assembly. The vibration assembly is fixedly connected to the vibration bracket, and the vibration bracket is connected to the first frame through a spring.

[0014] Furthermore, the sorting plate includes a frame, a connecting shaft, and a roller. The connecting shaft is fixedly connected to the frame, and the roller is rotatably mounted on the connecting shaft. The roller is provided with a groove for facilitating the passage of gas, and the groove is an annular groove.

[0015] Furthermore, the pyrolysis mechanism includes a second frame, an upper cover, a conveyor belt, an electromagnetic heating head and a second screw conveyor. The second frame is a hollow box with an opening at the upper end. The conveyor belt is fixedly arranged inside the second frame. There is a gap between the conveyor belt and the bottom of the second frame. The upper cover is fixedly connected to the upper end opening of the second frame. The electromagnetic heating head is fixedly arranged above the side walls at both ends of the second frame. The second screw conveyor is fixedly arranged on the second frame.

[0016] Furthermore, the second frame includes a rectangular groove and a third air distribution component. A plurality of rectangular grooves are arranged above the side walls at both ends of the second frame. The electromagnetic heating head is fixedly installed in the rectangular groove, and the third air distribution component is fixedly arranged at the bottom of the second frame.

[0017] Furthermore, the upper cover is provided with a fourth air distribution assembly, a guide plate, an air collecting hood and a feed port. The feed port is arranged on the upper cover, the fourth air distribution assembly and the guide plate are fixedly arranged on the lower end surface of the upper cover, and the air collecting hood is arranged on the upper end surface of the upper cover, located on the side away from the feed port.

[0018] Furthermore, the gas supply mechanism includes a nitrogen heating component and a nitrogen replenishing mechanism.

[0019] Furthermore, the nitrogen heating assembly includes a heat collecting tube and a fixed bracket, the heat collecting tube is a copper row pipe, the fixed bracket is fixedly connected to the heat collecting tube, the heat collecting tube is fixedly connected to the bottom of the side walls at both ends of the second frame, the air inlet end of the heat collecting tube is connected to the nitrogen replenishing mechanism and the cooling mechanism through a pipeline, the air outlet end of the heat collecting tube is connected to the second air distribution assembly, the third air distribution assembly, and the fourth air distribution assembly through a pipeline, and the nitrogen replenishing mechanism is connected to the heat collecting tube and the first air distribution assembly through a roller.

[0020] A waste wind turbine blade recycling process, based on the waste wind turbine blade recycling equipment, is characterized by comprising the following steps:

[0021] S1. Crushing: Put the wind turbine blades after preliminary cutting into a crusher for crushing, separate the fiber-reinforced composite materials from the sandwich materials in the wind turbine blades and crush them into particles with an average particle size of ≤270 mm;

[0022] S2, nitrogen preheating treatment, the high-pressure nitrogen absorbs the heat generated by the pyrolysis mechanism in the nitrogen heating component to become high-temperature and high-pressure nitrogen;

[0023] S3, sorting and pretreatment, the crushed mixed particles are transported to the sorting mechanism, and the fiber-reinforced composite materials and sandwich materials with different densities are separated by vibration, high-pressure nitrogen and high-temperature and high-pressure nitrogen. At the same time, the high-temperature and high-pressure nitrogen is used to preheat and dry them, and the preheating temperature range is 150-200℃.

[0024] S4, pyrolysis, the fiber-reinforced composite material is subjected to high-temperature pyrolysis in the pyrolysis mechanism, the pyrolysis temperature range is 350-500°C, and pyrolysis gas and fiber material are generated, wherein the fiber material is transported out of the device through the second screw conveyor;

[0025] S5, condensation, the pyrolysis gas in the pyrolysis mechanism 3 enters the cooling mechanism, the pyrolysis gas is condensed to become pyrolysis oil, and the generated pyrolysis oil is recovered.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention discloses a waste wind turbine blade resource recovery equipment and process. The crusher cooperates with the sorting mechanism to sort the material particles generated after the wind turbine blades are crushed. Before the pyrolysis separation of plastics and various fibers, this part of the sandwich material is separated out, thereby improving the quality of the recycled materials and realizing the independent recycling of the sandwich materials.

[0028] 2. The present invention discloses a waste wind turbine blade resource utilization equipment and process. The equipment feeding and discharging are both realized by using a screw conveyor. At the same time, the retention section of the screw conveyor can be automatically blocked and isolated, effectively preventing nitrogen and some particles and debris from diffusing out of the equipment, saving resources while protecting the environment from pollution.

[0029] 3. The present invention discloses a waste wind turbine blade resource utilization equipment and process. The pyrolysis mechanism uses an electromagnetic heating head to replace the traditional fuel combustion heating for heating, which can improve efficiency and protect the environment. At the same time, a nitrogen heating component is arranged on the pyrolysis mechanism to recover part of the waste heat and improve resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0031] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0032] Figure 3 It is a structural diagram of the sorting mechanism;

[0033] Figure 4 is a cross-sectional schematic diagram of a sorting mechanism;

[0034] Figure 5 It is the structural schematic diagram of the sorting plate;

[0035] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0036] Figure 7 Schematic diagram of the pyrolysis mechanism Figure 1 ;

[0037] Figure 8 Schematic diagram of the pyrolysis mechanism Figure 2 ;

[0038] Fig. 9 is a cross-sectional schematic diagram of a pyrolysis mechanism;

[0039] Fig.10 It is a schematic diagram of the structure of the upper cover;

[0040] Fig.11 It is a schematic diagram of the principle of the air supply mechanism of the present invention.

[0041] The reference numerals involved in the accompanying drawings are:

[0042] 1. Crushing mechanism; 11. Crusher; 12. First screw conveyor; 2. Sorting mechanism; 21. First frame; 211. First feed port; 212. First discharge chute; 213. Second discharge chute; 22. Vibrating bracket; 221. Spring; 23. Sorting plate; 231. Frame; 232. Connecting shaft; 233. Roller; 234. Groove; 25. First air distribution assembly; 26. Second air distribution assembly; 27. Vibrating assembly; 28. Cyclone dust collector ; 29. ​​Mixing screw conveyor; 3. Pyrolysis mechanism; 31. Second frame; 311. Rectangular trough; 312. Third gas distribution assembly; 32. Upper cover; 321. Fourth gas distribution assembly; 322. Guide plate; 323. Gas collecting hood; 324. Feed inlet; 33. Conveyor belt; 34. Electromagnetic heating head; 35. Nitrogen heating assembly; 351. Heat collecting pipe; 352. Fixed bracket; 36. Second screw conveyor; 4. Cooling mechanism; 5. Nitrogen replenishing mechanism. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0044] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Example

[0046] See also Figures 1 to 11 As shown, a waste wind turbine blade resource recovery device includes: a crushing mechanism 1, a sorting mechanism 2, a pyrolysis mechanism 3, a cooling mechanism 4 and an air supply mechanism.

[0047] The crushing mechanism 1 includes a crusher 11 and a first screw conveyor 12 . The crusher 11 is connected to the sorting mechanism 2 via the first screw conveyor 12 . It can be understood that the first screw conveyor 12 can convey particles crushed by the crushing mechanism 1 to the sorting mechanism 2 .

[0048] The sorting mechanism 2 includes: a first frame 21, a sorting component, a cyclone dust collector 28, and a mixing screw conveyor 29. The first frame 21 is a hollow closed box, that is, the first feed port 211 and the first discharge trough 212 of the sorting mechanism 2 are connected by a screw conveyor, and there is a retention section that can achieve automatic blocking and isolation. At this time, the high-pressure nitrogen, high-temperature and high-pressure nitrogen mixed in the cavity of the sorting mechanism 2 and the blown fine particles cannot diffuse outside the equipment. Specifically, the first frame 21 is provided with a first feed port 211, a first discharge trough 212 and a second discharge trough 213, the first feed port 211 is arranged at the top of the first frame 21, and the first discharge trough 212 and the second discharge trough 213 are arranged on the first frame 21 on one side close to the pyrolysis mechanism 3.

[0049] The sorting assembly includes a vibration bracket 22 , a spring 221 , a sorting plate 23 , a first air distribution assembly 25 , a second air distribution assembly 26 , and a vibration assembly 27 . The upper end surface of the vibration bracket 22 is an inclined surface, and the sorting plate 23 is fixedly installed on the vibration bracket 22. There is a gap between the sorting plate 23 and the inclined surface of the vibration bracket 22. The first air distribution component 25 is fixedly connected to the middle position of the inclined surface, and the second air distribution component 26 is fixedly connected to the inclined surface and is located on both sides of the first air distribution component 25. Correspondingly, the first air distribution component 25 and the second air distribution component 26 are both provided with upwardly inclined air outlets. It can be understood that after the first screw conveyor 12 transports the crushed particles to the sorting mechanism 2, they will fall on the sorting plate 23. The first air distribution component 25 sprays high-pressure nitrogen to the middle of the sorting plate 23, and the second air distribution component 26 sprays high-temperature and high-pressure nitrogen to both sides of the sorting plate 23. The high-pressure nitrogen and the high-temperature and high-pressure nitrogen pass through the sorting plate 23, and their pressure can push the lighter density sandwich material particles on the sorting plate 23 to move upward. At the same time, the high-pressure nitrogen and the high-temperature high-pressure nitrogen are mixed in the cavity of the sorting mechanism 2. The mixed nitrogen has a higher pressure and temperature, which can replenish the nitrogen in the equipment. In addition, some smaller particles or debris will be blown up by the nitrogen and enter the cyclone dust collector 28 together. The vibration component 27 is fixedly connected to the vibration bracket 22, and the vibration bracket 22 is connected to the first frame 21 through the spring 221. It can be understood that the vibration component 27 cooperates with the spring 221 to make the sorting component vibrate continuously as a whole, and at the same time, the first frame 21, the cyclone dust collector 28 and the mixing screw conveyor 29 will vibrate slightly synchronously. The vibration causes particles with different densities to be layered on the inclined sorting plate 23, and particles with larger density move downward and fall into the first discharge trough 212. Particles with lighter mass move upward under the push of high-pressure gas and vibration and fall into the second discharge trough 213.

[0050] The sorting plate 23 includes a frame 231, a connecting shaft 232, and a roller 233. The connecting shaft 232 is fixedly connected to the frame 231, and the roller 233 is rotatably mounted on the connecting shaft 232. The roller 233 is provided with a groove 234 for gas to pass through. Correspondingly, the groove 234 is an annular groove, and it can be understood that the roller 233 can rotate around the connecting shaft 232 to facilitate the particles to move upward or downward on the sorting plate 23. The groove 234 facilitates the nitrogen sprayed by the first gas distribution component 25 and the second gas distribution component 26 to pass through the sorting plate 23 and blow directly onto the particles, and at the same time, it can prevent the nitrogen pressure from being too high to blow the roller 233 to rotate.

[0051] The sorting component is arranged inside the first frame 21, and the first frame 21 is connected to the pyrolysis mechanism 3 through the mixing screw conveyor 29. The cyclone dust collector 28 is fixedly installed on the mixing screw conveyor 29. Correspondingly, the connection is located on the side of the mixing screw conveyor 29 close to the pyrolysis mechanism 3. The air inlet of the mixing screw conveyor 29 is connected to the first frame 21, and the dust outlet is connected to the mixing screw conveyor 29. It can be understood that the high-temperature and high-pressure nitrogen mixed in the sorting component can enter the mixing screw conveyor 29 through the cyclone dust collector 28, and bypass the retention section of the screw conveyor, so that the nitrogen can enter the pyrolysis mechanism 3 through the mixing screw conveyor 29. At the same time, the particles and debris blown up by the nitrogen can be collected by the cyclone dust collector 28 and enter the mixing screw conveyor 29, and then enter the pyrolysis mechanism 3 after being mixed with the sorted fiber-reinforced composite material with higher density, which can effectively solve the waste of nitrogen in the sorting component and the diffusion of some particles and debris into the environment. The corresponding vibration assembly 27 drives the cyclone dust collector 28 to vibrate, which can prevent the cyclone dust collector 28 from being blocked.

[0052] The pyrolysis mechanism 3 is connected to the cooling mechanism 4 at one side away from the sorting mechanism 2. Specifically, the pyrolysis mechanism 3 includes a second frame 31, an upper cover 32, a conveyor belt 33, an electromagnetic heating head 34 and a second screw conveyor 36. The second frame 31 includes a rectangular groove 311 and a third gas distribution component 312. A plurality of rectangular grooves 311 are arranged above the side walls at both ends of the second frame 31. The electromagnetic heating head 34 is fixedly installed in the rectangular groove 311, and the third gas distribution component 312 is fixedly arranged at the bottom of the second frame 31. The second frame 31 is a hollow box with an upper end opening. The conveyor belt 33 is fixedly arranged inside the second frame 31. There is a gap between the conveyor belt 33 and the bottom of the second frame 31. Correspondingly, the nozzle of the third gas distribution component 312 is arranged in the gap. It can be understood that high-temperature and high-pressure nitrogen is sprayed to the conveyor belt 33 and the fiber-reinforced composite material particles on the conveyor belt 33 to enhance the pyrolysis efficiency while blowing the generated pyrolysis gas to the top of the pyrolysis mechanism 3. The electromagnetic heating head 34 is fixedly disposed above the side walls at both ends of the second frame 31 , and the second screw conveyor 36 is fixedly disposed on the second frame 31 . It can be understood that the electromagnetic heating head 34 can heat the fiber reinforced composite material on the conveyor belt 33 .

[0053] The upper cover 32 is fixedly connected to the upper opening of the second frame 31. Specifically, the upper cover 32 is provided with a fourth gas distribution component 321, a guide plate 322, a gas collecting hood 323, and a feed port 324. The feed port 324 is provided on the upper cover 32. The fourth gas distribution component 321 and the guide plate 322 are fixedly provided on the lower end surface of the upper cover 32. The gas collecting hood 323 is provided on the upper end surface of the upper cover 32, and is located on the side away from the feed port 324. It can be understood that the fourth gas distribution component 321 sprays high-temperature and high-pressure nitrogen in the direction of the guide plate 322, so that the pyrolysis gas generated by pyrolysis can move toward the gas collecting hood 323 before contacting the upper cover 32, preventing the pyrolysis gas from cooling in the upper cover 32 to become pyrolysis oil. At the same time, the guide plate 322 can guide the movement of nitrogen and pyrolysis gas. The mixed gas of pyrolysis gas and nitrogen enters the cooling mechanism 4 to form pyrolysis oil to be recovered, and the nitrogen enters the nitrogen heating component 35 through the pipeline for recycling.

[0054] The gas supply mechanism comprises a nitrogen heating component 35 and a nitrogen replenishing mechanism 5 .

[0055] Specifically, the nitrogen heating assembly 35 includes a heat collecting pipe 351 and a fixed bracket 352. The heat collecting pipe 351 is a copper row pipe. The fixed bracket 352 is fixedly connected to the heat collecting pipe 351. The heat collecting pipe 351 is fixedly connected to the lower side walls at both ends of the second frame 31. It can be understood that the nitrogen in the heat collecting pipe 351 can absorb the waste heat generated by the pyrolysis mechanism 3 during pyrolysis, thereby improving the energy utilization rate. The air inlet end of the heat collecting pipe 351 is connected to the nitrogen replenishing mechanism 5 and the cooling mechanism 4 through a pipeline, and the air outlet end of the heat collecting pipe 351 is connected to the second air distribution assembly 26, the third air distribution assembly 312, and the fourth air distribution assembly 321 through a pipeline. The nitrogen replenishing mechanism 5 is connected to the heat collecting pipe 351 and the first air distribution assembly 25 through a roller. It can be understood that nitrogen circulates among the nitrogen heating assembly 35, the sorting mechanism 2, the pyrolysis mechanism 3, and the cooling mechanism 4, and the nitrogen replenishing mechanism 5 can replenish nitrogen to the sorting mechanism 2 and the nitrogen heating assembly 35. Example

[0056] A waste wind turbine blade recycling process, based on the waste wind turbine blade recycling equipment, is characterized by comprising the following steps:

[0057] S1. Crushing: Put the wind turbine blades after preliminary cutting into a crusher for crushing, separate the fiber-reinforced composite materials from the sandwich materials in the wind turbine blades and crush them into particles with an average particle size of ≤270 mm;

[0058] S2, nitrogen preheating treatment, the high-pressure nitrogen absorbs the heat generated by the pyrolysis mechanism in the nitrogen heating component to become high-temperature and high-pressure nitrogen;

[0059] S3, sorting and pretreatment, the crushed mixed particles are transported to the sorting mechanism, and the fiber-reinforced composite materials and sandwich materials with different densities are separated by vibration, high-pressure nitrogen and high-temperature and high-pressure nitrogen. At the same time, the high-temperature and high-pressure nitrogen is used to preheat and dry them, and the preheating temperature range is 150-200℃.

[0060] S4, pyrolysis, the fiber-reinforced composite material is subjected to high-temperature pyrolysis in the pyrolysis mechanism, the pyrolysis temperature range is 350-500°C, and pyrolysis gas and fiber material are generated, wherein the fiber material is transported out of the device through the second screw conveyor;

[0061] S5, condensation, the pyrolysis gas in the pyrolysis mechanism 3 enters the cooling mechanism, the pyrolysis gas is condensed to become pyrolysis oil, and the generated pyrolysis oil is recovered.

[0062] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the field are aware of all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A waste wind turbine blade resource recovery device, characterized in that: include: A crushing mechanism (1), a sorting mechanism (2), a pyrolysis mechanism (3), a cooling mechanism (4) and a gas supply mechanism; The crushing mechanism (1) comprises a crusher (11) and a first screw conveyor (12); the crusher (11) is connected to the sorting mechanism (2) via the first screw conveyor (12); The sorting mechanism (2) comprises: a first frame (21), a sorting component, a cyclone dust collector (28), and a mixing screw conveyor (29); the first frame (21) is a hollow closed box; the sorting component is arranged inside the first frame (21); the first frame (21) is connected to the pyrolysis mechanism (3) via the mixing screw conveyor (29); the cyclone dust collector (28) is fixedly mounted on the mixing screw conveyor (29); the air inlet of the cyclone dust collector (28) is connected to the first frame (21); and the dust outlet is connected to the mixing screw conveyor (29); The first frame (21) is provided with a first feed inlet (211), a first discharge trough (212) and a second discharge trough (213); the first feed inlet (211) is provided at the top of the first frame (21); the first discharge trough (212) and the second discharge trough (213) are provided on a side of the first frame (21) close to the pyrolysis mechanism (3); The sorting assembly comprises a vibration support (22), a spring (221), a sorting plate (23), a first air distribution assembly (25), a second air distribution assembly (26), and a vibration assembly (27); the upper end surface of the vibration support (22) is an inclined surface; the sorting plate (23) is fixedly mounted on the vibration support (22); a gap exists between the sorting plate (23) and the inclined surface of the vibration support (22); the first air distribution assembly (25) is fixedly connected to a middle position of the inclined surface; the second air distribution assembly (26) is fixedly connected to the inclined surface and is located on both sides of the first air distribution assembly (25); the vibration assembly (27) is fixedly connected to the vibration support (22); and the vibration support (22) is connected to the first frame (21) via a spring (221); The sorting plate (23) comprises a frame (231), a connecting shaft (232), and a roller (233), wherein the connecting shaft (232) is fixedly connected to the frame (231), the roller (233) is rotatably mounted on the connecting shaft (232), and the roller (233) is provided with a groove (234) for facilitating the passage of gas, and the groove (234) is an annular groove; The side of the pyrolysis mechanism (3) away from the sorting mechanism (2) is connected to the cooling mechanism (4).

2. The waste wind turbine blade recycling equipment according to claim 1 is characterized by: The pyrolysis mechanism (3) comprises a second frame (31), an upper cover (32), a conveyor belt (33), an electromagnetic heating head (34) and a second screw conveyor (36); the second frame (31) is a hollow box with an upper opening; the conveyor belt (33) is fixedly arranged inside the second frame (31); a gap exists between the conveyor belt (33) and the bottom of the second frame (31); the upper cover (32) is fixedly connected to the upper opening of the second frame (31); the electromagnetic heating head (34) is fixedly arranged above the side walls at both ends of the second frame (31); and the second screw conveyor (36) is fixedly arranged on the second frame (31).

3. The waste wind turbine blade recycling equipment according to claim 2 is characterized by: The second frame (31) comprises a rectangular groove (311) and a third air distribution assembly (312); a plurality of rectangular grooves (311) are provided above the side walls at both ends of the second frame (31); the electromagnetic heating head (34) is fixedly mounted in the rectangular groove (311); and the third air distribution assembly (312) is fixedly mounted at the bottom of the second frame (31).

4. The waste wind turbine blade recycling equipment according to claim 3 is characterized by: The upper cover (32) is provided with a fourth air distribution component (321), a guide plate (322), an air collecting hood (323), and a feed port (324); the feed port (324) is provided on the upper cover (32); the fourth air distribution component (321) and the guide plate (322) are fixedly provided on the lower end surface of the upper cover (32); and the air collecting hood (323) is provided on the upper end surface of the upper cover (32), and is located on a side away from the feed port (324).

5. The waste wind turbine blade recycling equipment according to claim 4 is characterized by: The gas supply mechanism comprises a nitrogen heating component (35) and a nitrogen replenishing mechanism (5).

6. The waste wind turbine blade recycling equipment according to claim 5 is characterized by: The nitrogen heating assembly (35) comprises a heat collecting tube (351) and a fixed bracket (352); the heat collecting tube (351) is a copper row tube; the fixed bracket (352) is fixedly connected to the heat collecting tube (351); the heat collecting tube (351) is fixedly connected below the side walls at both ends of the second rack (31); the air inlet end of the heat collecting tube (351) is connected to a nitrogen replenishment mechanism (5) and a cooling mechanism (4) through a pipeline; the air outlet end of the heat collecting tube (351) is connected to a second air distribution assembly (26), a third air distribution assembly (312), and a fourth air distribution assembly (321) through a pipeline; and the nitrogen replenishment mechanism (5) is connected to the heat collecting tube (351) and the first air distribution assembly (25) through a pipeline.

7. A waste wind turbine blade recycling process, based on the waste wind turbine blade recycling equipment according to claim 6, characterized in that: The following steps are involved: S1, crushing, placing the wind turbine blades after preliminary cutting into a crusher (11) for crushing, separating the fiber reinforced composite material and the sandwich material in the wind turbine blades and crushing them into particles with an average particle size of ≤270 mm; S2, nitrogen preheating treatment, the high-pressure nitrogen absorbs the heat generated by the pyrolysis mechanism (3) in the nitrogen heating component (35) to become high-temperature and high-pressure nitrogen; S3, sorting and pretreatment, conveying the crushed mixed particles to the sorting mechanism (2), separating the fiber reinforced composite materials and sandwich materials with different densities through vibration, high-pressure nitrogen and high-temperature and high-pressure nitrogen, and preheating and drying them with high-temperature and high-pressure nitrogen, with the preheating temperature ranging from 150 to 200°C; S4, pyrolysis, the fiber-reinforced composite material is subjected to high-temperature pyrolysis in the pyrolysis mechanism (3), the pyrolysis temperature range is 350-500° C., pyrolysis gas and fiber material are generated, wherein the fiber material is conveyed out of the device through a second screw conveyor (36); S5, condensation, the pyrolysis gas in the pyrolysis mechanism (3) enters the cooling mechanism (4), the pyrolysis gas is condensed to become pyrolysis oil, and the generated pyrolysis oil is recovered.

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