Recycling system and method for wind turbine blade sandwich material

Abstract

The present disclosure relates to a wind turbine blade core material recycling system and method, which comprises a detection positioning mechanism, a metal removal mechanism, a cutting and marking mechanism and a core material separation mechanism. The detection positioning mechanism is configured to obtain the position of metal parts in the blade and the distribution parameters of basswood and PVC foam. The metal removal mechanism is configured to remove the metal parts in the blade according to the parameters obtained by the detection positioning mechanism. The cutting and marking mechanism is configured to mark the basswood and PVC foam in the blade after the metal removal mechanism, and cut the blade into basswood blade blocks and PVC foam blade blocks along the marking lines. The core material separation mechanism is configured to strip the basswood in the basswood blade blocks and the PVC foam in the PVC foam blade blocks by a drilling machine. In this way, the basswood and PVC foam in the wind turbine blade can be separated by the recycling system to obtain basswood and PVC foam with high purity.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wind turbine blade core material recycling, in particular to a wind turbine blade core material recycling system and method. BACKGROUND

[0002] Since the service life of a wind turbine blade is only about twenty years, the early constructed wind turbine units will face the problem of retirement and recycling, and it is estimated that the retirement will be intensive in 2025. At present, the disposal methods of waste wind turbine blades mainly include stacking, burying and crushing, and the balsa wood and PVC foam in the blades are disposed together with the glass fiber reinforced plastic material. Even if a small part of the balsa wood and PVC foam is screened out by using the sorting method in the crushing process, the purity is still very low, and the balsa wood and PVC foam cannot be recycled separately, resulting in great waste of resources. SUMMARY

[0003] The purpose of the present disclosure is to provide a wind turbine blade core material recycling system and method, which can separate the balsa wood and PVC foam in the wind turbine blade to obtain balsa wood and PVC foam with high purity, so as to at least partially solve the problems in the related art.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a wind turbine blade core material recycling system, comprising: a detection positioning mechanism, a metal removal mechanism, a cutting and marking sorting mechanism and a core material separation mechanism; the detection positioning mechanism is configured to obtain the position of the metal part in the blade and obtain the distribution parameters of the balsa wood and PVC foam in the blade; the metal removal mechanism is configured to remove the metal part in the blade according to the parameters obtained by the detection positioning mechanism; the cutting and marking sorting mechanism is configured to mark and cut the balsa wood and PVC foam in the blade after the metal removal mechanism, and cut the blade into balsa wood blade blocks and PVC foam blade blocks along the marking line; and the core material separation mechanism is configured to strip the balsa wood in the balsa wood blade blocks and the PVC foam in the PVC foam blade blocks by using a drill machine.

[0005] Optionally, the detection positioning mechanism comprises an identification imaging instrument and a density detector, the identification imaging instrument is configured to be capable of shooting / scanning the blade to obtain the position of the metal part in the blade, and the density detector is configured to be capable of obtaining the distribution position, distribution shape and distribution thickness of the balsa wood and PVC foam in the blade.

[0006] Optionally, the identification imaging instrument can adopt any one of an X-ray imaging instrument, an infrared digital camera and a laser imaging instrument.

[0007] Optionally, the cutting line sorting mechanism comprises a line marking machine, a cutting machine and a first material conveyor, the line marking machine is configured to mark the balsa wood and the PVC foam in the leaf according to the distribution parameters of the balsa wood and the PVC foam in the leaf obtained by the detection positioning mechanism, the cutting machine is configured to cut the leaf into at least balsa wood leaf pieces and PVC foam leaf pieces along the marked line, and the first material conveyor is configured to convey the balsa wood leaf pieces and the PVC foam leaf pieces to the core material separation mechanism respectively.

[0008] Optionally, the core material separation mechanism comprises a leaf piece storage assembly and a core drill assembly, the leaf piece storage assembly is configured to store the balsa wood leaf pieces and the PVC foam leaf pieces separately, and the core drill assembly is configured to separate the balsa wood in the balsa wood leaf pieces and the PVC foam in the PVC foam leaf pieces according to the distribution parameters of the balsa wood and the PVC foam in the leaf obtained by the detection positioning mechanism.

[0009] Optionally, the core drill assembly comprises a core drill machine, a workbench, a clamp and a core material collection pipe, the core drill machine is arranged in the first direction and spaced apart from the clamp, the clamp is arranged on the workbench and used for clamping and fixing the balsa wood leaf pieces and the PVC foam leaf pieces, the core drill machine is configured to move in the second direction and extend and retract in the first direction, so that the drill bit of the core drill machine can separate the balsa wood in the balsa wood leaf pieces and the PVC foam in the PVC foam leaf pieces, and the core material collection pipe is configured to move synchronously with the core drill machine and collect the separated balsa wood from the balsa wood leaf pieces or the separated PVC foam from the PVC foam leaf pieces by a suction fan.

[0010] Optionally, the core material separation mechanism further comprises a heating assembly, the heating assembly is configured to heat the PVC foam leaf pieces clamped by the clamp, so as to facilitate the core drill machine to separate the PVC foam in the PVC foam leaf pieces.

[0011] Optionally, the heating assembly is arranged on the workbench, and the heating assembly comprises a heating plate and a heating cloth, the heating plate is fixedly arranged on the workbench and located below the clamp, and the heating cloth is located above the heating plate and used for heating the upper side of the PVC foam leaf pieces, and the heating plate is used for heating the lower side of the PVC foam leaf pieces.

[0012] Optionally, the recycling system further comprises a plurality of recycling boxes arranged in parallel, wherein at least one of the recycling boxes is used to receive the balsa wood conveyed by the second conveyor, and at least another one of the recycling boxes is used to receive the PVC foam conveyed by the second conveyor.

[0013] The second aspect of this disclosure provides a method for recycling the core material of a wind turbine blade, used in the aforementioned wind turbine blade core material recycling system. The recycling method includes: obtaining the location of metal parts in the blade and the distribution parameters of the core materials balsa wood and PVC foam in the blade through the detection and positioning mechanism; removing the metal parts in the blade through the metal removal mechanism according to the parameters obtained by the detection and positioning mechanism; marking and scribing the balsa wood and PVC foam of the blade according to the results in the positioning mechanism through the cutting and scribing sorting mechanism, and cutting and separating the blade into segments along the scribing lines to obtain blade blocks containing balsa wood and blade blocks containing PVC foam; and separating the balsa wood and PVC foam from the blade blocks according to the distribution parameters of the blade blocks containing balsa wood and blade blocks containing PVC foam.

[0014] The above technical solution, through a detection and positioning mechanism, a metal removal mechanism, a cutting and marking sorting mechanism, and a core material separation mechanism, enables the balsa wood and PVC foam in wind turbine blades to be separated from the blades. Specifically, the detection and positioning mechanism obtains the location of the metal parts in the blade and the distribution parameters of the balsa wood and PVC foam core materials. Based on the parameters obtained by the detection and positioning mechanism, the metal parts in the blade are removed by the metal removal mechanism. The cutting and marking sorting mechanism marks the wind turbine blade after the metal parts have been removed, according to the distribution parameters of the balsa wood and PVC foam, and cuts the blade into segments along the marks to obtain blade blocks containing balsa wood and blade blocks containing PVC foam. Based on the distribution parameters of the blade blocks containing balsa wood and blade blocks containing PVC foam, the core material separation mechanism separates the balsa wood and PVC foam from the blade blocks. This improves the yield of high-purity balsa wood and PVC foam during wind turbine blade recycling, avoiding resource waste.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the process of the wind turbine blade core material recycling system provided in the exemplary embodiments of this disclosure;

[0018] Figure 2 This is a schematic diagram of the core material separation mechanism provided in an exemplary embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram of the structure of the cutting and marking sorting mechanism provided in an exemplary embodiment of this disclosure;

[0020] Figure 4 is a flowchart of a recycling method of a wind turbine blade sandwich material of the present disclosure.

[0021] Legend

[0022] 1 - detection positioning mechanism; 11 - identification imager; 12 - density detector; 2 - metal removal mechanism; 3 - cutting and marking sorting mechanism; 31 - marking machine; 32 - cutting machine; 33 - first connecting rod; 34 - second connecting rod; 35 - moving support; 4 - core material separation mechanism; 41 - blade piece storage assembly; 42 - core drill assembly; 421 - core drill; 422 - workbench; 423 - clamp; 424 - core material collection pipe; 425 - drill bit; 426 - core drill rack; 427 - extension collection pipe; 43 - heating assembly; 431 - heating plate; 432 - heating cloth; 5 - first recycling box; 6 - second recycling box; 7 - third recycling box; 8 - fourth recycling box; 9 - bag-type dust collector; 10 - exhaust fan. DETAILED DESCRIPTION

[0023] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0024] In the present disclosure, the terms "first", "second", and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential or important meanings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0025] As Figures 1-3 shown, the first aspect of the present disclosure provides a recycling system of a wind turbine blade sandwich material, comprising: a detection positioning mechanism 1, a metal removal mechanism 2, a cutting and marking sorting mechanism 3, and a core material separation mechanism 4; the detection positioning mechanism 1 is configured to obtain the position of metal parts in the blade and obtain the distribution parameters of basswood and PVC foam in the blade; the metal removal mechanism 2 is configured to remove the metal parts in the blade according to the parameters obtained by the detection positioning mechanism 1; the cutting and marking sorting mechanism 3 is configured to mark and cut the basswood and PVC foam in the blade after the metal removal mechanism 2, and cut the blade into basswood blade pieces and PVC foam blade pieces along the marking line; the core material separation mechanism 4 is configured to strip the basswood in the basswood blade pieces and strip the PVC foam in the PVC foam blade pieces by a core drill.

[0026] Through the technical scheme, the balsa wood and the PVC foam in the wind power blade can be separated from the blade through the detection positioning mechanism 1, the metal removal mechanism 2, the cutting and marking sorting mechanism 3 and the core material separation mechanism 4, that is, the position of the metal part in the blade and the distribution parameters of the balsa wood and the PVC foam in the blade are obtained through the detection positioning mechanism 1, the metal part in the blade is removed through the metal removal mechanism 2 according to the parameters obtained by the detection positioning mechanism 1, the blade after the metal part in the blade is removed is marked and cut along the mark according to the distribution parameters of the balsa wood and the PVC foam in the blade through the cutting and marking sorting mechanism 3, so as to obtain the blade block containing the balsa wood and the blade block containing the PVC foam, and the balsa wood and the PVC foam are separated from the blade block through the core material separation mechanism 4 according to the distribution parameters of the blade block containing the balsa wood and the blade block containing the PVC foam, so that the balsa wood and the PVC foam with high purity can be obtained when the wind power blade is recycled, and resource waste is avoided.

[0027] In order to facilitate the acquisition of the distribution parameters of the sandwich material in the blade, in some implementable manners, the detection positioning mechanism 1 comprises an identification imager 11 and a density detector 12. The identification imager 11 is configured to be capable of shooting / scanning the blade to obtain the position of the metal part in the blade. The density detector 12 is configured to be capable of obtaining the distribution position, distribution shape and distribution thickness of the balsa wood and the PVC foam in the blade. For example, the identification imager 11 can process the blade in two ways of shooting and scanning to obtain the position of the metal part in the blade. The metal part can be the bolt at the root of the blade and the sensor, lightning conductor and other metal parts inside the blade. The density detector 12 can detect the density of different parts of the blade, so as to obtain the specific distribution position of the balsa wood, the PVC foam and the glass steel in the sandwich material in the blade, the thickness of each sandwich material, the outer contour of each sandwich material and other parameters according to the change of the density.

[0028] It should be noted that the identification imager 11 can adopt any one of an X-ray imager, an infrared digital camera and a laser imager. In the present disclosure, the identification imager 11 can select an X-ray imager. The X-ray imager is used to shoot and scan the blade to obtain the position of the bolt at the root of the blade and the metal part inside the blade, so as to facilitate the subsequent removal of the metal part. The X-ray imager, the infrared digital camera and the laser imager in the identification imager 11 are all existing devices, which can be purchased according to the specific working condition requirements. Similarly, the density detector 12 is also an existing device, which can be purchased according to the specific working condition requirements.

[0029] In order to facilitate the removal of the metal piece, in some embodiments, the metal removal mechanism 2 can be removed by a mechanical arm provided with a sawing piece, the mechanical arm can rotate at any angle and can also be telescopic, so that the sawing piece can saw the blade or the blade root bolt, the sawing piece can choose to cut off the outer periphery of the blade root bolt to separate the bolt from the blade, or can cut off the fixing part of the sensor and the lightning wire to separate the sensor and the lightning wire from the blade.

[0030] In order to facilitate the cutting and slicing of the balsa wood and PVC foam in the blade, in some embodiments, the cutting and slicing sorting mechanism 3 includes a marking machine 31, a cutting machine 32 and a first material conveying machine, the marking machine 31 is configured to mark and slice the balsa wood and PVC foam in the blade according to the distribution parameters of the balsa wood and PVC foam in the blade obtained by the detection positioning mechanism 1, the cutting machine 32 is configured to cut the blade into at least balsa wood blade blocks and PVC foam blade blocks along the marked slice, and the first material conveying machine is configured to convey the balsa wood blade blocks and the PVC foam blade blocks to the processing position of the core material separation mechanism respectively. Wherein, the cutting and slicing sorting mechanism 3 includes a moving support 35, a marking machine 31 and a first connecting rod 33, the first connecting rod 33 is configured to move in front and back and left and right directions with the moving support 35 and the first connecting rod 33 is also configured to be telescopic, the marking machine 31 can rotate at any angle around the connecting end of the first connecting rod 33, so that when the metal piece is removed, the blade is placed on the cutting plate and fixed, the marking machine 31 marks and slices the balsa wood and PVC foam according to the specific distribution position of the balsa wood and PVC foam in the core material, the thickness of each core material, the outer contour of each core material and other parameters, the cutting machine 32 is connected with the moving support 35 through a second connecting rod 34, the second connecting rod 34 is configured to move in front and back and left and right directions with the moving support 35 and the second connecting rod 34 is also configured to be telescopic, wherein, the front and back directions and the left and right directions can be referred to as Figure 3 , Figure 3 the direction facing the paper is the front direction, Figure 3The left and right directions of the paper are the left and right directions, and the cutting machine 32 cuts and separates the leaves into fragments along the score line, so that the balsa wood leaf blocks containing the balsa wood sandwich material and the PVC foam leaf blocks containing the PVC foam sandwich material are obtained by cutting the leaves by the cutting machine 32. The cutting machine 32 can adopt any one of laser cutting, water jet cutting, and circular saw blade cutting. When cutting, there are also pure glass fiber leaf blocks and leaf edge scraps caused by cutting. The balsa wood leaf blocks and the PVC foam leaf blocks are transported to the leaf block storage assembly 41 in the core material separation mechanism 4 for classified storage. The leaf edge scraps caused by cutting can be transported to the collection for storage by the first material conveyor. The pure glass fiber leaves are collected by the pure glass fiber collection box, and the leaf edge scraps caused by cutting are collected by the edge scrap collection box. In addition, in order to facilitate the separation of balsa wood and PVC foam from the leaves, in some implementable manners, the width of the balsa wood leaf blocks and the PVC foam leaf blocks is 300 mm, and the length is 500 mm.

[0031] It can be understood that the first material conveyor described above can be any one of a belt conveyor, a plate chain conveyor, a tube chain conveyor, or a screw conveyor. In the present disclosure, the first material conveyor preferably adopts a belt conveyor or a plate chain conveyor for conveying.

[0032] In order to facilitate the separation of balsa wood and PVC foam from the leaves for the balsa wood leaf blocks and the PVC foam leaf blocks, in some implementable manners, the core material separation mechanism 4 includes a leaf block storage assembly 41 and a drill assembly 42. The leaf block storage assembly 41 is configured to be able to store the balsa wood leaf blocks and the PVC foam leaf blocks in a classified manner. The drill assembly 42 is configured to be able to separate the balsa wood in the balsa wood leaf blocks and separate the PVC foam in the PVC foam leaf blocks according to the distribution parameters of the balsa wood and the PVC foam in the leaves obtained by the detection positioning mechanism 1.

[0033] The leaf block storage assembly 41 can include a first storage rack and a second storage rack. The first storage rack is used to store the balsa wood leaf blocks, and the second storage rack is used to store the PVC foam leaf blocks. The drill assembly 42 can include a drill machine 421, a workbench 422, a clamp 423, and a core material collection pipe 424. The drill machine 421 is arranged in a first direction and spaced apart from the clamp 423. The clamp 423 is located on the workbench 422 and is used to clamp and fix the balsa wood leaf blocks and the PVC foam leaf blocks. The clamp 423 can be configured as two spaced apart clamping belts. The two ends of the clamping belts are respectively clamped with clamping joints on the workbench 422, so as to fix the balsa wood leaf blocks or the PVC foam leaf blocks on the workbench 422 by the clamping belts. The drill machine 421 is configured to be movable in a second direction and to be able to stretch and contract in the first direction. The first direction can refer to the up and down direction of the paper, and the second direction can refer to the left and right direction of the paper. Figure 2 The leaf block storage assembly 41 can include a first storage rack and a second storage rack. The first storage rack is used to store the balsa wood leaf blocks, and the second storage rack is used to store the PVC foam leaf blocks. The drill assembly 42 can include a drill machine 421, a workbench 422, a clamp 423, and a core material collection pipe 424. The drill machine 421 is arranged in a first direction and spaced apart from the clamp 423. The clamp 423 is located on the workbench 422 and is used to clamp and fix the balsa wood leaf blocks and the PVC foam leaf blocks. The clamp 423 can be configured as two spaced apart clamping belts. The two ends of the clamping belts are respectively clamped with clamping joints on the workbench 422, so as to fix the balsa wood leaf blocks or the PVC foam leaf blocks on the workbench 422 by the clamping belts. The drill machine 421 is configured to be movable in a second direction and to be able to stretch and contract in the first direction. The first direction can refer to the up and down direction of the paper, and the second direction can refer to the left and right direction of the paper. Figure 2The core material collection pipe 424 is configured to be able to move synchronously with the core drill 421 and collect the separated basswood from the basswood leaf block or the separated PVC foam from the PVC foam leaf block through the air extractor. It can be understood that the core material separation mechanism 4 further comprises a second conveyor for conveying the corresponding leaf block after the basswood and the PVC foam are separated.

[0034] It can be understood that the above-mentioned core drill 421 can automatically program the drilling process according to the specific distribution parameters of the basswood and the PVC foam obtained by the detection positioning mechanism 1. The automatic drilling process can include information such as the position, direction, adjustment angle, depth, etc. of the drilling. The drill bit can also be equipped with a drilling speed sensor. When the drilling speed is less than 0.05 m / min during drilling along the automatic drilling program, the position of the drill bit is automatically adjusted. When the drilling speed is greater than 0.1 m / min, the drill bit is automatically advanced. The core drill 421 includes a telescopic rod, the end of the telescopic rod is provided with a drill bit 425, the drill bit is configured to be able to rotate around its own axis, the core material collection pipe 424 includes a core material collection telescopic pipe and a core material collection hose, the core material collection telescopic pipe is located below the telescopic rod and can be telescoped with the telescopic rod, the core material collection hose is in communication with the core material collection telescopic pipe, and the core material is collected under negative pressure after drilling by setting an air extractor at the end of the core material collection hose. For example, when the core material of the basswood leaf block is separated, the glass leaf block and the basswood are drilled by the drill bit 425 according to the preset position and preset speed, and the negative pressure of the air extractor can suck the separated basswood from the core material collection telescopic pipe and send the basswood to a preset storage position. Similarly, the negative pressure of the air extractor can suck the separated PVC foam from the core material collection telescopic pipe and send the PVC foam to a preset storage position.

[0035] In order to facilitate the separation of PVC foam in the PVC foam blade block, in some embodiments, the core material separation mechanism 4 further comprises a heating assembly 43 configured to heat the PVC foam blade block clamped by the clamp 423 to facilitate the drill 421 to separate the PVC foam in the PVC foam blade block. The heating assembly 43 is arranged on the workbench 422, and the heating assembly 43 comprises a heating plate 431 and a heating cloth 432. The heating plate 431 is fixedly arranged on the workbench 422 and located below the clamp 423. The heating cloth 432 is located above the heating plate 431 and used to heat the upper side of the PVC foam blade block. The heating plate 431 is used to heat the lower side of the PVC foam blade block. When heating, the heating cloth located above is attached to the upper surface of the PVC foam blade block, so that the upper and lower parts of the PVC foam blade block can be heated to a preset temperature through two different heating methods, and then the drill bit 425 is used to drill the PVC foam blade block to separate it. When the PVC foam blade block is drilled to separate it, the drilling speed is 0.3-0.5 m / min, and the heating temperature of the heating assembly 43 is 120°C.

[0036] In some embodiments, in order to facilitate classification and recycling, the recycling system further comprises a first recycling box 5 for collecting balsa wood, a second recycling box 6 for collecting PVC foam, a third recycling box 7 for collecting blade scraps, and a fourth recycling box 8 for collecting glass steel blades.

[0037] In addition, in order to suppress the dust generated in the recycling system, in some embodiments, the recycling system further comprises a dust removal assembly connected with the cutting and scribing sorting mechanism 3 and the core material separation mechanism 4. The dust removal assembly comprises a bag-type dust collector 9 and an air suction machine 10. The cutting machine 32 of the cutting and scribing sorting mechanism 3 and the drill assembly 42 of the core material separation mechanism 4 are communicated with the bag-type dust collector 9 through air pipes. The dust is sucked into the bag-type dust collector 9 by the air suction machine 10 to avoid the dust generated by cutting in the recycling system.

[0038] As Figure 4As shown, the second aspect of the present disclosure provides a wind power blade core material recycling method for the wind power blade core material recycling system described above; the recycling method comprises: S101, obtaining the position of the metal part in the blade and the distribution parameters of the balsa wood and PVC foam in the core material in the blade through the positioning mechanism 1; S102, removing the metal part in the blade according to the parameters obtained by the detection positioning mechanism 1 through the metal removal mechanism 2; S103, marking and cutting the balsa wood and PVC foam in the blade according to the results in the positioning mechanism 1 through the cutting and marking mechanism 3, and cutting the blade into segments along the cutting line to obtain the blade block containing balsa wood and the blade block containing PVC foam; S104, separating the balsa wood and PVC foam from the blade block according to the distribution parameters of the blade block containing balsa wood and the blade block containing PVC foam through the core material separation mechanism 4. In this way, the position of the metal part in the blade and the distribution parameters of the balsa wood and PVC foam in the core material in the blade are obtained through the detection positioning mechanism 1, the metal part in the blade is removed through the metal removal mechanism 2 according to the parameters obtained by the detection positioning mechanism 1, the blade after the metal part in the blade is removed is marked and cut according to the distribution parameters of the balsa wood and PVC foam in the blade through the cutting and marking mechanism 3, and the blade is cut into segments along the cutting line to obtain the blade block containing balsa wood and the blade block containing PVC foam, and the balsa wood and PVC foam are separated from the blade block according to the distribution parameters of the blade block containing balsa wood and the blade block containing PVC foam through the core material separation mechanism 4, so that the balsa wood and PVC foam with high purity can be obtained when the wind power blade is recycled, and resource waste is avoided.

[0039] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0040] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0041] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A recycling system for wind turbine blade core material, characterized in that, include: Detection and positioning mechanism, metal removal mechanism, cutting and marking sorting mechanism, and core material separation mechanism; The detection and positioning mechanism is configured to acquire the location of metal parts in the blade and the distribution parameters of balsa wood and PVC foam in the blade; The metal removal mechanism is configured to remove metal parts from the blades based on parameters obtained by the detection and positioning mechanism. The cutting and marking sorting mechanism is configured to mark the balsa wood and PVC foam inside the blade after passing through the metal removal mechanism, and to cut and separate the blade into balsa wood blade pieces and PVC foam blade pieces along the marking lines. The core material separation mechanism is configured to peel balsa wood from the balsa wood blade block and peel PVC foam from the PVC foam blade block using a drilling machine.

2. The wind turbine blade sandwich material recycling system according to claim 1, characterized in that, The detection and positioning mechanism includes an identification imager and a density detector. The identification imager is configured to take pictures / scan the blade to obtain the position of the metal parts in the blade, and the density detector is configured to obtain the distribution position, distribution shape and distribution thickness of balsa wood and PVC foam in the blade.

3. The wind turbine blade sandwich material recycling system according to claim 2, characterized in that, The identification imaging device can be any one of an X-ray imager, an infrared digital camera, or a laser imager.

4. The wind turbine blade sandwich material recycling system according to any one of claims 1-3, characterized in that, The cutting and marking sorting mechanism includes a marking machine, a cutting machine, and a first material conveyor. The marking machine is configured to mark the balsa wood and PVC foam in the blade according to the distribution parameters of balsa wood and PVC foam obtained by the detection and positioning mechanism. The cutting machine is configured to cut the blade along the marked lines to separate it into at least balsa wood blade blocks and PVC foam blade blocks. The first material conveyor is configured to transport the balsa wood blade blocks and PVC foam blade blocks to the processing area of ​​the core material separation mechanism, respectively.

5. The wind turbine blade sandwich material recycling system according to claim 4, characterized in that, The core material separation mechanism includes a blade block storage component and a drilling component. The blade block storage component is configured to store balsa wood blade blocks and PVC foam blade blocks separately. The drilling component is configured to separate balsa wood from the balsa wood blade and PVC foam from the PVC foam blade block based on the distribution parameters of balsa wood and PVC foam in the blade obtained by the detection and positioning mechanism.

6. The wind turbine blade sandwich material recycling system according to claim 5, characterized in that, The drilling assembly includes a drilling machine, a worktable, a clamp, and a core material collection pipe. The drilling machine is spaced apart from the clamp in a first direction. The clamp is located on the worktable and is used to clamp and fix the balsa wood blade block and the PVC foam blade block. The drilling machine is configured to move in a second direction and extend and retract in the first direction, so that the drill bit of the drilling machine can separate the balsa wood from the balsa wood blade block and separate the PVC foam from the PVC foam blade block. The core material collection pipe is configured to move synchronously with the drilling machine and collect the balsa wood after separation of the balsa wood blade block or the PVC foam after separation of the PVC foam blade block through a fan.

7. The wind turbine blade sandwich material recycling system according to claim 6, characterized in that, The core material separation mechanism further includes a heating component configured to heat the PVC foam blade block after it is clamped by the fixture, so as to facilitate the separation of PVC foam from the PVC foam blade block by the drilling machine.

8. The wind turbine blade sandwich material recycling system according to claim 7, characterized in that, The heating assembly is disposed on the workbench. The heating assembly includes a heating plate and a heating cloth. The heating plate is fixedly disposed on the workbench and located below the fixture. The heating cloth is located above the heating plate and is used to heat the upper side of the PVC foam blade block. The heating plate is used to heat the lower side of the PVC foam blade block.

9. The wind turbine blade sandwich material recycling system according to claim 8, characterized in that, The recycling system also includes a first recycling bin for collecting balsa wood, a second recycling bin for collecting PVC foam, a third recycling bin for collecting blade scraps, and a fourth recycling bin for collecting fiberglass blades; and / or The recycling system also includes a dust removal component, which is connected to the cutting and marking sorting mechanism and the core material separation mechanism.

10. A method for recycling sandwich material of wind turbine blades, characterized in that, A recycling system for wind turbine blade sandwich material according to any one of claims 1-9, the recycling method comprising: The location of the metal parts in the blade and the distribution parameters of the core materials balsa wood and PVC foam in the blade are obtained through the detection and positioning mechanism. The metal removal mechanism removes the metal parts from the blade based on the parameters obtained by the detection and positioning mechanism. The cutting and marking sorting mechanism marks the balsa wood and PVC foam leaves according to the results of the detection and positioning mechanism, and cuts the leaves into segments along the marking lines to obtain leaf blocks containing balsa wood and leaf blocks containing PVC foam. The core material separation mechanism separates the balsa wood and PVC foam from the blade blocks based on the distribution parameters of the blade blocks containing balsa wood and the blade blocks containing PVC foam.

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