A method for recycling a wind power blade

Abstract

The application belongs to the field of resource recycling of thermosetting composite materials, and particularly relates to a method for resource recycling of wind turbine blades, which comprises the following steps: cutting a wind turbine blade into large pieces of fragments by a laser cutting machine, and collecting a powdery mixture generated during the cutting; placing the large pieces of fragments in a plasma low-temperature incinerator to perform low-temperature incineration, so as to obtain glass fibers; sorting the powdery mixture by using an air flow sorting machine, so as to separate glass fibers and an epoxy resin powder mixture, and basswood powder; and performing electrostatic sorting on the glass fibers and the epoxy resin powder mixture, so as to separate glass fiber powder and epoxy resin powder. The method for resource recycling of wind turbine blades can process glass fibers by using a plasma low-temperature incinerator, the system can maintain low temperature during the processing, and the sample as a whole is not heated, so that the obtained glass fibers have high strength, small tensile strength loss, long fiber length, and high recycling value.

Description

Technical Field

[0001] This invention belongs to the field of resource recycling of thermosetting composite materials, and specifically relates to a method for resource recycling of wind turbine blades. Background Technology

[0002] With the development of my country's wind power industry, wind power generation has become the third largest power generation method after thermal power and hydropower. While vigorously developing these clean energy sources, my country is also seeing an increasing number of retired wind turbine blades. How to recycle and utilize these blades in a high-value manner has become a major challenge hindering the development of the wind power industry.

[0003] Currently, the main methods for recycling and processing wind turbine blades both domestically and internationally are divided into mechanical recycling, thermal recycling, and chemical methods. While mechanical recycling requires less investment, it recovers short glass fibers with significant loss of mechanical properties, resulting in low recycling value. Thermal recycling recovers glass fibers with a substantial loss of strength and incurs high reaction costs. Chemical methods recover long glass fibers with high purity, but suffer from severe reagent contamination and are prohibitively expensive, thus hindering industrial application. It is clear that my country currently lacks a mature technological path to address the upcoming wave of wind turbine blade retirements. Therefore, recycling and processing wind turbine blades presents both an opportunity and a challenge for the entire industry. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art and to propose a method for the resource recycling of wind turbine blades.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for the resource recycling of wind turbine blades includes:

[0007] Wind turbine blades are cut into large pieces using a laser cutting machine, and the powdery mixture generated during the cutting process is collected.

[0008] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing to obtain glass fibers.

[0009] The powder mixture is separated by an air classifier to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0010] The mixture of glass fiber and epoxy resin powder is electrostatically separated to separate the glass fiber powder and epoxy resin powder.

[0011] Optionally, the size of the large fragment is 0.5m*0.5m.

[0012] Optionally, the laser cutting machine has a cutting speed of 10-20 m / min and a laser output power of 200-500 W.

[0013] Optionally, when the plasma low-temperature ashing instrument performs low-temperature ashing of large fragments, the reaction temperature of the plasma low-temperature ashing instrument is 100-150℃, the ultrapure oxygen flow rate is 1-3L / min, the plasma output power is 30-75W, the reaction time is 1-5h, and the operating vacuum degree is 0.04-0.1kPa.

[0014] Optionally, when the powdered mixture is sorted by an air classifier, the airflow velocity of the air classifier is 8-11 m / s and the pulsation frequency is 1-5 Hz.

[0015] Optionally, when the glass fiber and epoxy resin powder mixture is electrostatically separated, the electrostatic separation voltage is 25-50kV and the rotation speed is 60-80rpm.

[0016] The present invention has the following beneficial effects:

[0017] This invention discloses a method for the resource recycling of wind turbine blades. It utilizes a plasma low-temperature ashing instrument to process glass fibers. During the process, the system maintains a low temperature, ensuring the sample is not heated. Therefore, the resulting glass fibers exhibit high strength, minimal tensile strength loss, long fiber length, and high recycling value. The glass fiber powder obtained through physical sorting is of high purity and can be reused as building materials or reinforcing materials. The process is simple, does not use chemical reagents, and generates no waste gas or liquid, making it environmentally friendly and achieving high material utilization. This invention provides a reference for the industrialization of wind turbine blade resource recycling.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] Figure 1 A flowchart illustrating the steps of resource recycling of wind turbine blades provided in this embodiment of the invention;

[0021] Figure 2 This is a first-view schematic diagram of an airflow separator provided in an embodiment of the present invention;

[0022] Figure 3 This is a second-view schematic diagram of an airflow separator provided in an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the airflow separator provided in an embodiment of the present invention;

[0024] Figure 5A schematic diagram of a sorting cylinder provided in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the feeding cylinder provided in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of a material dispersion component provided in an embodiment of the present invention;

[0027] Figure 8 A partial structural diagram provided for an embodiment of the present invention. Figure 1 ;

[0028] Figure 9 A partial structural diagram provided for an embodiment of the present invention. Figure 2 .

[0029] Icons: 1. Sorting cylinder; 2. Cylinder cover; 3. Feeding cylinder; 4. Lower discharge port; 5. Upper discharge port; 6. Material dispersion component; 601. Support frame; 602. Dispersion shaft; 603. Material dispersion disc; 604. Compression spring; 605. Longitudinal shaft; 606. Grading wheel; 607. Shaft frame; 608. Horizontal shaft; 609. Friction disc; 610. Bending connecting rod; 611. Rotating horizontal shaft; 612. Dispersion impeller; 613. Linkage gear; 614. Discharge auger; 7. Power component; 8. Inclined air inlet pipe; 9. Collection box; 10. Filter screen; 11. Material tray; 12. Sliding shaft; 13. Spring; 14. Shaft body; 15. Scraper plate. Detailed Implementation

[0030] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0031] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for 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. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] In this document, unless otherwise stated, the term "multiple" means two or more.

[0033] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0036] The following is in conjunction with the appendix Figure 1-9 The present invention will be described in further detail below.

[0037] like Figure 1 As shown, a method for resource recycling of wind turbine blades includes:

[0038] The wind turbine blades are cut into large fragments using a laser cutting machine. The laser cutting machine has a cutting speed of 10-20 m / min and a laser output power of 200-500 W. The powdery mixture generated during the cutting process is also collected.

[0039] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing treatment. The reaction temperature of the plasma low-temperature ashing apparatus was 100-150℃, the ultrapure oxygen flow rate was 1-3L / min, the plasma output power was 30-75W, the reaction time was 1-5h, and the operating vacuum degree was 0.04-0.1kPa, to obtain glass fibers.

[0040] The powder mixture is separated by an air classifier with an air velocity of 8-11 m / s and a pulsation frequency of 1-5 Hz, separating the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0041] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 25-50kV and a rotation speed of 60-80rpm to separate the glass fiber powder and epoxy resin powder.

[0042] This invention discloses a method for the resource recycling of wind turbine blades. The wind turbine blades are first cut into large fragments (0.5m x 0.5m) using a laser cutter to facilitate subsequent processing. The powdery mixture generated during cutting is collected. The large fragments are then placed in a plasma low-temperature ashing instrument for low-temperature ashing to obtain glass fiber. The powdery mixture is then sorted using an airflow separator to separate the glass fiber and epoxy resin powder mixture, as well as balsa wood powder. The separated balsa wood powder can be directly recycled. The glass fiber and epoxy resin powder mixture is then further processed... Electrostatic separation is used to separate glass fiber powder and epoxy resin powder, which are then recycled separately. In this invention, glass fiber is treated with a plasma low-temperature ashing instrument. During the treatment process, the system can maintain a low temperature, and the sample as a whole is not heated. Therefore, the resulting glass fiber has high strength, low tensile strength loss, long fiber length, and high recycling value. The glass fiber powder obtained by this invention through physical separation has high purity and can be reused as building material or reinforcing material. The process is simple, does not use chemical reagents, and generates no waste gas or waste liquid. It is environmentally friendly and has a high material utilization rate, providing a reference for the industrialization of wind turbine blade resource recycling.

[0043] To facilitate understanding of the above technical solutions of the present invention, the following detailed embodiments will further illustrate the above technical solutions of the present invention.

[0044] Example 1

[0045] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0046] The wind turbine blades were cut using a laser cutting machine at a speed of 10 m / min and a laser output power of 200 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0047] After the powdered mixture is collected, it is sorted by airflow at a velocity of 8 m / s and a pulsation frequency of 1 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0048] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 25kV and a rotation speed of 60rpm. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0049] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 100℃, the ultrapure oxygen flow rate was 1L / min, the plasma output power was 30W, the reaction time was 1h, and the operating vacuum degree was 0.04kPa, ultimately yielding glass fibers.

[0050] Example 2

[0051] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0052] The wind turbine blades were cut using a laser cutting machine at a speed of 15 m / min and a laser output power of 300 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0053] After the powdered mixture is collected, it is sorted by airflow at a velocity of 9 m / s and a pulsation frequency of 2 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0054] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 30kV and a rotation speed of 70rpm to separate glass fiber powder and epoxy resin powder. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0055] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 110℃, the ultrapure oxygen flow rate was 1.5L / min, the plasma output power was 40W, the reaction time was 2h, and the operating vacuum degree was 0.06kPa, ultimately yielding glass fibers.

[0056] Example 3

[0057] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0058] The wind turbine blades were cut using a laser cutting machine at a speed of 20 m / min and a laser output power of 400 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0059] After the powdered mixture is collected, it is sorted by airflow at a velocity of 10 m / s and a pulsation frequency of 3 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0060] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 35kV and a rotation speed of 80rpm. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0061] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 120℃, the ultrapure oxygen flow rate was 2L / min, the plasma output power was 50W, the reaction time was 3h, and the operating vacuum degree was 0.07kPa, ultimately yielding glass fibers.

[0062] Example 4

[0063] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0064] The wind turbine blades were cut using a laser cutting machine at a speed of 15 m / min and a laser output power of 500 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0065] After the powdered mixture is collected, it is sorted by airflow at a velocity of 11 m / s and a pulsation frequency of 4 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0066] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 40kV and a rotation speed of 70rpm to separate glass fiber powder and epoxy resin powder. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0067] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 130℃, the ultrapure oxygen flow rate was 2.5L / min, the plasma output power was 60W, the reaction time was 4h, and the operating vacuum degree was 0.08kPa, ultimately yielding glass fibers.

[0068] Example 5

[0069] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0070] The wind turbine blades were cut using a laser cutting machine at a speed of 20 m / min and a laser output power of 400 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0071] After the powdered mixture is collected, it is sorted by airflow at a velocity of 9 m / s and a pulsation frequency of 5 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0072] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 45kV and a rotation speed of 70rpm to separate glass fiber powder and epoxy resin powder. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0073] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 140℃, the ultrapure oxygen flow rate was 3L / min, the plasma output power was 75W, the reaction time was 5h, and the operating vacuum degree was 0.09kPa, ultimately yielding glass fibers.

[0074] Example 6

[0075] like Figure 1 As shown, in practical applications, the resource recycling process of wind turbine blades can be described as follows:

[0076] The wind turbine blades were cut using a laser cutting machine at a speed of 20 m / min and a laser output power of 400 W, resulting in large fragments and a powdery mixture with dimensions of 0.5 m x 0.5 m.

[0077] After the powdered mixture is collected, it is sorted by airflow at a velocity of 9 m / s and a pulsation frequency of 4 Hz to separate the glass fiber and epoxy resin powder mixture and balsa wood powder.

[0078] The mixture of glass fiber and epoxy resin powder is electrostatically separated at a voltage of 50kV and a rotation speed of 70rpm to separate glass fiber powder and epoxy resin powder. The glass fiber powder can be reused as a building material or reinforcing material, while the epoxy resin powder can be used as a coating, etc.

[0079] Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing. The reaction temperature was 150℃, the ultrapure oxygen flow rate was 2.5L / min, the plasma output power was 75W, the reaction time was 5h, and the operating vacuum degree was 0.1kPa, ultimately yielding glass fibers.

[0080] Example 7

[0081] Figure 2-9This invention illustrates a specific scheme for an airflow separator. The airflow separator includes a separator cylinder 1, a cylinder cover 2 connected to the top of the separator cylinder 1, a feeding cylinder 3 connected to the center hole of the cylinder cover 2, a lower discharge port 4 at the bottom of the separator cylinder 1, and an upper discharge port 5 on the upper side of the separator cylinder 1. A material dispersion component 6 is rotatably connected inside the separator cylinder 1, and a power component 7 mounted on the cylinder cover 2 is connected to the upper part of the material dispersion component 6. An inclined air inlet pipe 8 is provided on the lower side of the separator cylinder 1, and the inclined air inlet pipe 8 is inserted into the separator. The horizontal height of the tube inside cylinder 1 is higher than the horizontal height of the tube extending from the inclined air inlet pipe 8 to the outside of the sorting cylinder 1; the inclined air inlet pipe 8 is connected to an air supply pump; the outer end of the upper discharge port 5 is detachably connected to the collection box 9, the air outlet at the top of the collection box 9 is connected to a filter screen 10, the material tray 11 is slidably fitted in the collection trough of the collection box 9, the sliding shaft 12 fixed at the bottom of the material tray 11 slides on the box cover at the bottom of the collection box 9 and extends to the bottom of the box cover, and a spring 13 is provided between the material tray 11 and the box cover.

[0082] When the airflow separator sorts the powdery mixture, an external air supply pump is connected to the inclined air inlet pipe 8 and turned on. The power unit 7 is then activated, driving the material dispersion unit 6 to rotate within the sorting cylinder 1, generating negative pressure suction. This suction, combined with the air supply pump and inclined air inlet pipe 8, causes the airflow to move upwards, feeding the powdery mixture through the feeding cylinder 3 into the sorting cylinder 1. The powdery mixture is blocked by the inner wall of the feeding cylinder 3, falls onto the material dispersion unit 6, and is then thrown into the sorting cylinder 1. Under the action of the airflow inside the sorting cylinder 1, glass fiber and cyclic fibers are separated. The mixture of epoxy resin powder, balsa wood powder, glass fiber and epoxy resin powder is discharged through the lower discharge port 4, and the balsa wood powder is discharged through the upper discharge port 5 into the collection box 9. The airflow is discharged through the filter screen 10, and the balsa wood powder falls onto the material tray 11 for collection. When the balsa wood powder on the material tray 11 reaches the preset weight, it will drive the material tray 11 to slide downward in the collection trough, compress the spring 13, and drive the sliding shaft 12 to extend to the length of the side below the box cover, so as to facilitate timely observation of the material status collected in the collection box 9, facilitate timely discharge, and prevent failure to collect.

[0083] The material dispersion component 6 includes a support frame 601 horizontally installed inside the sorting cylinder 1. A dispersion shaft 602 is slidably connected within the central circle of the support frame 601. A material dispersion disk 603 fixed on the dispersion shaft 602 is located between the inclined air inlet pipe 8 and the upper discharge port 5. A compression spring 604 is fixed between the material dispersion disk 603 and the support frame 601, and the compression spring 604 is sleeved on the dispersion shaft 602. Multiple longitudinal sliding holes are evenly arranged around the material dispersion disk 603, and multiple longitudinal shafts 605 are slidably fitted within the multiple longitudinal sliding holes. The tops of the multiple longitudinal shafts 605 are fixed. A classifying wheel 606 is connected, with multiple vortex impellers evenly arranged around its outer surface. The inner side of the classifying wheel 606 rotatably engages with the outer side of the feeding cylinder 3. A dispersing shaft 602 extends through a shaft body 14 above the feeding cylinder 3 and is rotatably connected to a shaft bracket 607. The shaft bracket 607 slides on a vertical guide shaft at the top of the cylinder cover 2. A horizontal rotating shaft 608 is rotatably connected to the shaft bracket 607. A bevel gear fixed at one end of the horizontal rotating shaft 608 meshes with a bevel gear fixed on the dispersing shaft 602. A friction disc 609 fixed at the other end of the horizontal rotating shaft 608 is connected to a power component 7. The power component 7 includes a motor mounted on the cylinder cover 2. A friction wheel on the motor output shaft is vertically frictionally connected to the friction disc 609, and the friction wheel is located below the horizontal rotating shaft 608.

[0084] After the motor starts, it drives the friction wheel to rotate. The rotation of the friction wheel causes the friction disc 609 to rotate vertically, which in turn drives the horizontal rotating shaft 608 to rotate. A bevel gear on the horizontal rotating shaft 608 meshes with a fixed bevel gear on the dispersing shaft 602, causing the dispersing shaft 602 to rotate. The dispersing shaft 602 then drives the material dispersing disc 603 to rotate, evenly throwing the powdery mixture that falls onto the material dispersing disc 603 through the feeding cylinder 3 outwards. As the material dispersing disc 603 rotates, it drives the classifying wheel 606 to rotate via multiple longitudinal shafts 605. Multiple vortex impellers are evenly arranged around the outer surface of the classifying wheel 606, creating a swirling effect and generating suction, causing the airflow to rise. Under the action of the airflow, the glass fiber and epoxy resin powder mixture, as well as balsa wood powder, are separated. When the powdery mixture falling onto the material dispersing disc 603 through the feeding cylinder 3 has a high speed and a large weight, the impact force of the powdery mixture on the material dispersing disc 603 increases. At this time, the material dispersion disc 603 drives the dispersion shaft 602 to slide downward on the support frame 601 and compress the compression spring 604, making the opening between the material dispersion disc 603 and the classifying wheel 606 larger, which facilitates more effective ejection of the powdery mixture. The material dispersion disc 603 slides on multiple longitudinal shafts 605 without affecting its ability to drive the classifying wheel 606 to rotate. In addition, when the dispersion shaft 602 slides downward, it can drive the shaft frame 607 to slide downward on the vertical guide shaft at the top of the cylinder cover 2. The shaft frame 607 drives the horizontal rotating shaft 608 and the friction disc 609 to move downward. The distance between the axis of the friction disc 609 and the friction wheel becomes smaller. At this time, the number of rotations of the friction disc 609 driven by the rotation of the friction wheel increases, which can increase the rotation speed of the dispersion shaft 602, which is beneficial to improve the dispersion and ejection effect of the powdery mixture. It also drives the classifying wheel 606 to rotate faster, increasing the suction force, improving the sorting effect, and preventing the powdery mixture from falling directly and failing to be sorted in time when there is a large amount of it.

[0085] The upper surface of the classifying wheel 606 is uniformly surrounded and fixed with one end of multiple curved connecting rods 610. The other end of the multiple curved connecting rods 610 is rotatably connected to multiple rotating horizontal shafts 611. Dispersing impellers 612 are fixed on each of the multiple rotating horizontal shafts 611. The linkage gears 613 fixed on the multiple rotating horizontal shafts 611 mesh with the end face gear ring fixed inside the sorting cylinder 1. The end face gear ring is located above the linkage gear 613. The rotating horizontal shafts 611 are located between the classifying wheel 606 and the material dispersion disk 603.

[0086] When the classifying wheel 606 rotates, it drives multiple curved connecting rods 610 and multiple rotating horizontal shafts 611 to rotate and revolve. When the multiple rotating horizontal shafts 611 move, they drive the linkage gears 613 on them to roll on the end face gear ring, thereby generating rotation. When the multiple rotating horizontal shafts 611 rotate, they can drive the dispersing impeller 612 to rotate. The rotating horizontal shafts 611 are located between the classifying wheel 606 and the material dispersing disk 603, thereby further dispersing the powdery mixture through the dispersing impeller 612, improving the dispersion effect. Moreover, the end face gear ring is located above the linkage gear 613 to prevent the material from falling on the linkage gear 613 and affecting the meshing transmission effect.

[0087] The filter screen 10 is rotatably connected to a shaft 14 within its central hole. The shaft 14 is rotatably mounted on the collection box 9 via a bracket. A scraper 15 fixed at the bottom of the shaft 14 slides on the lower surface of the filter screen 10. A pulley 1 at the top of the shaft 14 is connected to a pulley 2 on a short shaft via a belt. The short shaft is rotatably connected to the cylinder cover 2. A rotating wheel on the short shaft is in frictional connection with a friction wheel. When the friction wheel rotates, it drives the rotating wheel to rotate, which in turn drives the short shaft and the pulley 2 on the short shaft to rotate. The pulley 2 drives the pulley 1 to rotate via a belt, thereby driving the shaft 14 and the scraper 15 on the shaft 14 to rotate. The scraper 15 cleans the lower surface of the filter screen 10, preventing the filter screen 10 from becoming clogged and affecting the exhaust effect, which in turn affects the sorting effect.

[0088] The bottom of the dispersing shaft 602 is fixed with a discharge spiral 614. The discharge spiral 614 is rotatably fitted into the lower discharge port 4 at the bottom of the sorting cylinder 1 to facilitate the discharge of materials. When the dispersing shaft 602 moves up and down, it can drive the discharge spiral 614 to move up and down, so that the discharge spiral 614 can better clear the materials in the lower discharge port 4 and prevent blockage.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

[0090] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0091] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the method embodiments described above.

[0092] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory, ROM, magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory, RAM, or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory, SRAM, or dynamic random access memory, DRAM, etc.

[0093] This invention is not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A method for the resource recycling of wind turbine blades, characterized in that, include: Wind turbine blades are cut into large pieces using a laser cutting machine, and the powdery mixture generated during the cutting process is collected. Large fragments were placed in a plasma low-temperature ashing apparatus for low-temperature ashing to obtain glass fibers. The powder mixture is separated by an air classifier to separate the glass fiber and epoxy resin powder mixture and balsa wood powder. The mixture of glass fiber and epoxy resin powder is electrostatically separated to separate the glass fiber powder and epoxy resin powder. The airflow separator includes a sorting cylinder (1), a cylinder cover (2) connected to the top of the sorting cylinder (1), a feeding cylinder (3) connected to the center hole of the cylinder cover (2), a lower discharge port (4) at the bottom of the sorting cylinder (1), and an upper discharge port (5) on the upper side of the sorting cylinder (1); a material dispersion component (6) is rotatably connected inside the sorting cylinder (1), and a power component (7) is connected above the material dispersion component (6) on the cylinder cover (2); an inclined air inlet pipe (8) is provided on the lower side of the sorting cylinder (1), and the horizontal height of the inclined air inlet pipe (8) inserted into the sorting cylinder (1) is higher than the horizontal height of the inclined air inlet pipe (8) extending out of the sorting cylinder (1); an air supply pump is connected to the inclined air inlet pipe (8); The material dispersion component (6) includes a support frame (601) horizontally installed inside the sorting cylinder (1), a dispersion shaft (602) slidably connected within the center circle of the support frame (601), and a material dispersion disc (603) fixed on the dispersion shaft (602) located between the inclined air inlet pipe (8) and the upper discharge port (5); a compression spring (604) is fixed between the material dispersion disc (603) and the support frame (601), and the compression spring (604) is sleeved on the dispersion shaft (602); multiple longitudinal sliding holes are evenly arranged around the material dispersion disc (603), and multiple longitudinal shafts (605) slide within the multiple longitudinal sliding holes, with the top of the multiple longitudinal shafts (605) fixedly connected. A grading wheel (606) is connected to a grading wheel (606). Multiple vortex impellers are evenly arranged around the outer wheel surface of the grading wheel (606). The inner side of the grading wheel (606) is rotatably fitted on the outer side of the feeding cylinder (3). The dispersing shaft (602) passes through to the shaft body (14) above the feeding cylinder (3) and is rotatably connected to the shaft bracket (607). The shaft bracket (607) slides on the vertical guide shaft at the top of the cylinder cover (2). The horizontal shaft (608) is rotatably connected to the shaft bracket (607). A bevel gear fixed at one end of the horizontal shaft (608) meshes with a bevel gear fixed on the dispersing shaft (602). The friction disc (609) fixed at the other end of the horizontal shaft (608) is connected to the power component (7). The power unit (7) includes a motor mounted on the cylinder cover (2), and a friction wheel on the output shaft of the motor is vertically frictionally connected to the friction disc (609), with the friction wheel located below the horizontal rotating shaft (608); After the motor starts, it drives the friction wheel to rotate. When the friction wheel rotates, the vertical friction drives the friction disc (609) to rotate. The rotation of the friction disc (609) drives the horizontal rotating shaft (608) to rotate. The bevel gear on the horizontal rotating shaft (608) meshes with the bevel gear fixed on the dispersing shaft (602), driving the dispersing shaft (602) to rotate. The dispersing shaft (602) drives the material dispersing disc (603) to rotate. When the material dispersing disc (603) rotates, it drives the classifying wheel (606) to rotate through multiple longitudinal shafts (605). Multiple vortex impellers are evenly arranged around the outer wheel surface of the classifying wheel (606). The material falls onto the material dispersing disc (603) through the feeding cylinder (3). When the speed and weight of the powdered mixture are high, the impact force of the powdered mixture on the material dispersion disc (603) increases. The material dispersion disc (603) drives the dispersion shaft (602) to slide downward on the support frame (601) and compress the compression spring (604), making the opening between the material dispersion disc (603) and the classifying wheel (606) larger. When the dispersion shaft (602) slides downward, it drives the shaft frame (607) to slide downward on the vertical guide shaft at the top of the cylinder cover (2). The shaft frame (607) drives the horizontal shaft (608) and the friction disc (609) to move downward, and the distance between the axis of the friction disc (609) and the friction wheel becomes smaller.

2. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, The large fragment measures 0.5m x 0.5m.

3. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, The laser cutting machine has a cutting speed of 10-20 m / min and a laser output power of 200-500 W.

4. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, When the plasma low-temperature ashing instrument performs low-temperature ashing of large fragments, the reaction temperature of the plasma low-temperature ashing instrument is 100-150℃, the ultrapure oxygen flow rate is 1-3L / min, the plasma output power is 30-75W, the reaction time is 1-5h, and the operating vacuum degree is 0.04-0.1kPa.

5. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, When the powdered mixture is sorted by an air classifier, the airflow velocity of the air classifier is 8-11 m / s and the pulsation frequency is 1-5 Hz.

6. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, When the glass fiber and epoxy resin powder mixture is electrostatically separated, the electrostatic separation voltage is 25-50kV and the rotation speed is 60-80rpm.

7. The method for resource recycling of wind turbine blades according to claim 1, characterized in that, The upper surface of the classifying wheel (606) is uniformly surrounded and fixed with one end of multiple curved connecting rods (610), and the other end of the multiple curved connecting rods (610) is rotatably connected to multiple rotating horizontal shafts (611). Dispersing impellers (612) are fixed on each of the multiple rotating horizontal shafts (611). The linkage gears (613) fixed on the multiple rotating horizontal shafts (611) mesh with the end face gear ring fixed in the sorting cylinder (1). The end face gear ring is located above the linkage gear (613). The rotating horizontal shafts (611) are located between the classifying wheel (606) and the material dispersing disc (603).

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