Retired fan blade treatment system and method

Abstract

The invention provides a decommissioned fan blade treatment system and method, and relates to the technical field of decommissioned fan blade treatment.The decommissioned fan blade treatment system comprises a crushing unit, a winnowing unit and a water separation unit, and the crushing unit is used for crushing decommissioned fan blades; a discharge port of the crushing unit, the winnowing unit and the water separation unit are sequentially connected, the winnowing unit is used for winnowing and separating materials with different specific gravities in crushed materials, the water separation unit is used for water separation and separating light materials and heavy materials in residual materials, the materials with different specific gravities comprise epoxy resin powder and short glass fibers, and the materials with different specific gravities comprise epoxy resin powder and short glass fibers. The residual materials are residual crushed materials after winnowing of the winnowing unit, the light materials comprise balsa wood, and the heavy materials comprise long fibers. A two-stage sorting system is formed by linkage of winnowing and water separation, epoxy resin powder, short glass fibers, balsa wood and long fibers in crushed materials can be effectively screened, and the sorting precision and the separation efficiency of the crushed materials are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of retired wind turbine blade processing, and in particular to a retired wind turbine blade processing system and method. Background Art

[0002] Retired wind turbine blades are classified as new energy solid waste, and they are large composite materials, mainly including glass fiber (reinforcement material), epoxy resin (matrix), core material (rigidity), etc. However, composite materials are irreversible during the chemical cross-linking process, and the products cannot be melted, reshaped, or naturally degraded after solidification, making them difficult to recycle. Therefore, in order to achieve the recycling and reuse of retired wind turbine blades, landfill, incineration, or physical recycling are usually used. Compared with landfill and incineration, physical recycling has become the main treatment method for retired wind turbine blades due to its advantages such as less pollution to the environment, large disposal scale, and low disposal cost.

[0003] The physical recycling method of related technology uses "Z"-shaped air separation equipment to sort the crushing products of retired wind turbines, but the actual sorting accuracy and separation efficiency are low, and the energy consumption is high, which limits the recycling of large-scale retired wind turbine blades. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of one aspect of the present invention proposes a retired fan blade processing system, which adopts the linkage of air separation and water separation to form a two-stage sorting system, which can realize the effective screening of epoxy resin powder, short glass fiber, balsa wood and long fiber in the crushed material, ensuring the sorting accuracy and separation efficiency of the crushed material.

[0006] Another embodiment of the present invention provides a method for processing retired wind turbine blades.

[0007] According to an embodiment of the present invention, a retired wind turbine blade processing system includes a crushing unit, an air separation unit and a water separation unit, wherein the crushing unit is used to crush retired wind turbine blades; the discharge port of the crushing unit, the air separation unit and the water separation unit are connected in sequence, the air separation unit is used to air-separate materials of different specific gravities in the crushed material, and the water separation unit is used to water-separate light materials and heavy materials in the remaining materials, wherein the materials of different specific gravities include epoxy resin powder and short glass fiber, the remaining materials are the remaining crushed materials after air separation by the air separation unit, the light materials include balsa wood, and the heavy materials include long fibers.

[0008] According to the retired fan blade processing system of an embodiment of the present invention, the retired fan blades can be crushed by the crushing unit to obtain crushed materials. When the crushed materials enter the air separation unit for air separation, due to the difference in specific gravity of different components in the crushed materials, the materials with different specific gravities can be screened and collected based on the specific gravity difference of different components, while the remaining materials continue to pass into the water separation unit for water separation. Since the weight of lightweight materials is lighter than that of heavy materials, the water separation unit can use the height difference (or liquid level difference) of the aqueous solution to make the lightweight materials float on the water surface, so as to separate the two materials by buoyancy. Therefore, the air separation unit and the water separation unit form a complementary relationship, wherein the air separation preferentially separates materials with different specific gravities (including epoxy resin powder and short glass fiber), while the water separation is used to process the remaining materials, thereby achieving efficient separation of different components in the crushed materials. Therefore, compared with the related art, the present invention adopts the linkage of air separation and water separation to form a two-stage sorting system, which can achieve effective screening of epoxy resin powder, short glass fiber, balsa wood and long fiber in the crushed materials, thereby ensuring the sorting accuracy and separation efficiency of the crushed materials.

[0009] In some embodiments, the crushing unit includes a first shredder, a second shredder and a hammer mill, and the feed inlets of the first shredder, the second shredder, the hammer mill and the air separation unit are connected in sequence, and the output particle size of the first shredder, the output particle size of the second shredder and the output particle size of the hammer mill decrease in sequence.

[0010] In some embodiments, the air separation unit includes a "Z"-shaped air separation device, a cyclone separator, a fiber separator and a wind conveying component.

[0011] Wherein, the feed port of the "Z"-shaped air separation equipment is connected with the discharge port of the crushing unit;

[0012] The discharge port of the "Z"-shaped air separation equipment, the cyclone separator, the fiber separator and the water separation unit are connected in sequence;

[0013] The wind conveying assembly is connected between the crushing unit, the "Z"-shaped air separation equipment, the cyclone separator and the fiber separator to convey the crushed material by wind.

[0014] In some embodiments, there are multiple cyclone separators, and the multiple cyclone separators are connected in sequence to perform multi-stage air separation on the crushed material, and all the cyclone separators are connected between the "Z"-shaped air separation equipment and the fiber separator.

[0015] In some embodiments, the wind conveying assembly includes a wind speed regulating device for regulating the speed of the conveying wind, and the wind speed regulating device is a variable frequency motor.

[0016] In some embodiments, the water selection unit includes a body, a first conveying device and a second conveying device.

[0017] Wherein, the machine body is provided with a water tank, and the light materials and heavy materials in the remaining materials can be separated under the buoyancy of the water in the water tank;

[0018] Wherein, the first conveying device is located outside the machine body, and the first conveying device is connected between the discharge port of the air separation unit and the feed port of the water tank to convey the remaining material to the water tank;

[0019] Wherein, the second conveying device is arranged in the water tank and is used to convey the remaining materials.

[0020] In some embodiments, the body is a 304 stainless steel body.

[0021] In some embodiments, the first conveying device and the second conveying device are both screw conveying devices.

[0022] In some embodiments, the water selection unit further includes a water level regulating component, and the water level regulating component is used to adjust the water level height in the water tank.

[0023] In some embodiments, the processing system further includes a control unit, which is electrically connected to both the wind speed regulating device and the water level regulating assembly.

[0024] In some embodiments, the processing system further comprises a dust removal unit, the dust removal unit having at least four air inlets, wherein the four air inlets are respectively connected to the dust removal port of each of the first shredder, the second shredder, the hammer mill, and the air separation unit;

[0025] The dust removal unit includes a pulse dust collector.

[0026] According to an embodiment of the present invention, a method for processing retired wind turbine blades includes the following steps:

[0027] Crushing: Place the retired fan blades in the crushing unit and crush them to obtain crushed materials;

[0028] Air separation, wherein the crushed material enters an air separation unit for air separation to separate materials with different specific gravities to obtain residual materials, wherein the materials with different specific gravities include epoxy resin powder and short glass fibers;

[0029] Water separation: the remaining materials continue to enter the water separation unit for water separation to separate light materials and heavy materials, wherein the light materials include balsa wood and the heavy materials include long fibers.

[0030] The technical advantages of the retired wind turbine blade processing method according to an embodiment of the present invention are the same as the technical advantages of the retired wind turbine blade processing system described above, and will not be repeated here.

[0031] In some embodiments, the crushing operation is specifically:

[0032] Primary crushing: placing the retired fan blades in a first shredder for primary crushing to obtain long strips of primary crushed material, wherein the width of the primary crushed material is B1, and B1 is ≤ 100 mm;

[0033] Secondary crushing: the primary crushed material enters the second shredder for further shredding to obtain a long strip of intermediate material, wherein the width of the intermediate material is B2, and B2 is ≤ 50 mm;

[0034] Crushing: sending the intermediate material into a hammer mill for crushing to obtain the crushed material, wherein the particle size of the crushed material is less than or equal to 5 meshes.

[0035] In some embodiments, the wind speed of the air selection unit is adjustable.

[0036] In some embodiments, the liquid level of water in the water tank of the water selection unit is adjustable.

[0037] In some embodiments, the processing method further includes dust removal, whereby exhaust gas from each of the first shredder, the second shredder, the hammer mill, and the air separation unit is passed into a dust removal unit for dust removal.

[0038] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 2 is a schematic structural diagram of a retired wind turbine blade processing system according to an embodiment of the present invention.

[0040] Figure 2 3. It is a front view of the connection structure between the body and the second conveying device in the retired wind turbine blade processing system according to an embodiment of the present invention.

[0041] Figure 3 3. It is a top view of the connection structure between the body and the second conveying device in the retired wind turbine blade processing system according to an embodiment of the present invention.

[0042] Figure 4 4 is a flow chart of a method for processing retired wind turbine blades according to an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1. Crushing unit; 11. First shredder; 12. Second shredder; 13. Hammer mill; 14. Feeding belt conveyor;

[0045] 2. Air separation unit; 21. "Z"-shaped air separation equipment; 22. Cyclone separator; 23. Fiber separator; 24. Wind conveying assembly;

[0046] 3. Water selection unit; 31. Machine body; 311. Water tank; 32. First conveying device; 33. Second conveying device;

[0047] 4. Dust removal unit. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0049] like Figure 1 As shown, a system for processing retired wind turbine blades according to an embodiment of the present invention includes a crushing unit 1, an air separation unit 2, and a water separation unit 3. The crushing unit 1 is used to crush retired wind turbine blades. The discharge port of the crushing unit 1, the air separation unit 2, and the water separation unit 3 are connected in sequence, so that the crushed material can enter the air separation unit 2 and the water separation unit 3 in sequence from the crushing unit 1 for two-stage sorting. The air separation unit 2 is used to separate materials of different specific gravities from the crushed material by air separation, and the water separation unit 3 is used to separate light materials and heavy materials from the remaining material by water separation. The materials of different specific gravities include epoxy resin powder and short glass fiber, and the remaining material is the remaining crushed material after air separation in the air separation unit 2. The light material includes balsa wood, and the heavy material includes long fiber.

[0050] According to the retired fan blade processing system of the embodiment of the present invention, the crushing unit 1 can crush the retired fan blades to obtain crushed materials. When the crushed materials enter the air separation unit 2 for air separation, due to the difference in specific gravity of different components in the crushed materials, the screening and collection of materials with different specific gravities can be achieved based on the specific gravity difference of different components, and the remaining materials continue to pass into the water separation unit 3 for water separation. Since the weight of light materials is lighter than that of heavy materials, the water separation unit 3 can use the height difference (or liquid level difference) of the water solution to make the light materials float on the water. On the surface, buoyancy is used to separate the two materials. Therefore, the air separation unit 2 and the water separation unit 3 complement each other. Among them, the air separation gives priority to separating materials of different specific gravities (including epoxy resin powder and short glass fiber), while the water separation is used to process the remaining materials, thereby realizing efficient separation of different components in the crushed material. Therefore, compared with the relevant technology, the present invention adopts the linkage of air separation and water separation to form a two-stage sorting system, which can realize the effective screening of epoxy resin powder, short glass fiber, balsa wood and long fiber in the crushed material, thereby ensuring the sorting accuracy and separation efficiency of the crushed material.

[0051] like Figure 1 As shown, in some embodiments, the crushing unit 1 includes a first shredder 11, a second shredder 12, and a hammer mill 13. The first shredder 11, the second shredder 12, the hammer mill 13, and the feed inlet of the air separation unit 2 are connected in sequence. In other words, the first shredder 11 can convey primary crushed material to the second shredder 12, the second shredder 12 can convey intermediate material to the hammer mill 13, and the hammer mill 13 can convey crushed material to the air separation unit 2. The particle size of the output material of the first shredder 11, the particle size of the output material of the second shredder 12, and the particle size of the output material of the hammer mill 13 decrease in sequence.

[0052] It can be understood that the first shredder 11, the second shredder 12 and the hammer mill 13 cooperate to form a three-stage crushing system, so that retired fan blades of a certain specification can be crushed into crushed materials with the particle size required for actual working conditions, so that the crushed materials under this particle size can be used as additives to building materials or other materials to enhance material properties, thereby effectively improving the resource utilization and high value utilization of retired fan blades.

[0053] For example, retired wind turbine blades with a length of ≤1000mm, a width of ≤1000mm, and a thickness of ≤80mm can be crushed into crushed materials with a size of less than 5 mesh.

[0054] Specifically, a feeding belt conveyor 14 can be used to feed materials between the first shredder 11 and the second shredder 12, between the second shredder 12 and the hammer crusher 13, and between the hammer crusher 13 and the air separation unit 2, so that the feeding belt conveyor 14 can ensure the working continuity of the crushing unit 1 and improve the crushing efficiency. The feeding belt conveyor 14 can extend upward at an angle, and the first shredder 11, the second shredder 12 and the hammer crusher 13 can all be installed at the same height, such as on a horizontal ground, to reduce the installation and fixing costs of the three. For fiberglass composite materials such as retired wind turbine blades, both the primary and secondary shredders can be dual-shaft shredders. The blades of the dual-shaft shredders can be made of hot-working die steel (i.e., 4Cr5MoSiV1 steel, or H13). The blade thickness of the primary shredder is 10 cm, and that of the secondary shredder is 5 cm. The main shaft is made of 42CrMo, and the reducer is a planetary reducer. The shredder speed is within 10 rpm. The aforementioned structural design allows the primary and secondary shredders to have a continuous service life exceeding 3,000 tons, ensuring sufficient torque to shred epoxy resin composite materials. Furthermore, the shredder startup method is required to be soft start. The hammer mill 13 can be a horizontal hammer crusher, which can crush shredded materials within 5 cm into 5 mesh sizes or less. The hammers of the shredder can be made of 16Mn, and the working surface is welded with tungsten carbide to improve the durability of the hammers.

[0055] like Figure 1 As shown, in some embodiments, the air separation unit 2 includes a “Z”-shaped air separation device 21 , a cyclone separator 22 , a fiber separator 23 and a wind conveying component 24 .

[0056] Among them, the feed port of the "Z"-shaped air separation equipment 21 is connected with the discharge port of the crushing unit 1. Specifically, the feed port of the "Z"-shaped air separation equipment 21 is connected with the discharge port of the hammer crusher 13. For example, the two can be fed through a loading belt conveyor 14. In other words, the feed port of the "Z"-shaped air separation equipment 21, the loading belt conveyor 14 and the discharge port of the hammer crusher 13 are connected in sequence.

[0057] Among them, the discharge port of the "Z"-shaped air separation equipment 21, the cyclone separator 22, the fiber separator 23 and the water selection unit 3 are connected in sequence.

[0058] Among them, the wind conveying component 24 is connected between the crushing unit 1, the "Z"-shaped air separation equipment 21, the cyclone separator 22 and the fiber separator 23 to convey the crushed material by wind. In other words, the crushed material between the crushing unit 1, the "Z"-shaped air separation equipment 21, the cyclone separator 22 and the fiber separator 23 is circulated through the wind conveying of the wind conveying component 24.

[0059] It can be understood that, on the basis of the "Z"-shaped air separation equipment 21 in the related art, a cyclone separator 22 and a fiber separator 23 are added, and the design of wind conveying the crushed material through the wind conveying component 24 can achieve effective separation of epoxy resin powder and short glass fiber in the crushed material.

[0060] like Figure 1 As shown, in some embodiments, there are multiple cyclone separators 22, and the multiple cyclone separators 22 are connected in sequence to perform multi-stage air separation on the crushed material. All cyclone separators 22 are connected between the "Z"-shaped air separation equipment 21 and the fiber separator 23, so that the multiple cyclone separators 22 cooperate to ensure the separation efficiency of the epoxy resin powder and short glass fiber in the crushed material.

[0061] In some embodiments, the wind conveying assembly 24 includes a wind speed regulating device (not shown in the figure) for adjusting the speed of the conveying wind, so as to achieve the separation of materials with different specific gravities (such as epoxy resin powder and short glass fiber) by adjusting the wind speed. The wind speed regulating device is a variable frequency motor. The use of a variable frequency motor to adjust the air volume can ensure sorting accuracy while reducing energy consumption.

[0062] Therefore, on the basis of the "Z"-shaped air separation equipment 21 in the related technology, a multi-stage cyclone separator 22 is added, and the wind speed regulating device dynamically adjusts the wind speed according to the characteristics of the crushed material. The structural design can improve the sorting accuracy, increase the separation efficiency to more than 90%, and reduce energy consumption by 15%.

[0063] like Figures 1 to 3 As shown, in some embodiments, the water selection unit 3 includes a body 31 , a first conveying device 32 and a second conveying device 33 .

[0064] The machine body 31 is provided with a water tank 311 , and the light materials and heavy materials in the remaining materials can be separated under the buoyancy of the water in the water tank 311 .

[0065] Among them, the first conveying device 32 is located outside the machine body 31, and the first conveying device 32 is connected between the discharge port of the air selection unit 2 and the feed port of the water trough 311 to convey the remaining material to the water trough 311, that is, the discharge port of the fiber separator 23 is connected with the feed port of the water trough 311 through the first conveying device 32.

[0066] The second conveying device 33 is disposed in the water tank 311 and is used to convey the remaining materials.

[0067] It can be understood that the first conveying device 32 can convey the remaining materials at the discharge port of the air separation unit 2 to the water trough 311, while the second conveying device 33 can continue to convey the remaining materials in the water trough 311, so as to efficiently separate the light materials and heavy materials in the remaining materials under the buoyancy of the water in the water trough 311. Among them, the second conveying device 33 can continuously convey the remaining materials for water separation to avoid the remaining materials from being blocked in the water trough 311, thereby affecting the continuity of the water separation operation.

[0068] like Figure 2 and Figure 3 As shown, in some embodiments, the body 31 is a 304 stainless steel body to enhance the wear resistance of the equipment.

[0069] like Figures 1 to 3 As shown, in some embodiments, the first conveying device 32 and the second conveying device 33 are both screw conveying devices. The use of screw conveying devices can accelerate the contact between the remaining material and water, so that the remaining material is dispersed in the water more quickly and evenly, thereby improving the separation efficiency (>90%).

[0070] Specifically, the first conveying device 32 and the second conveying device 33 can also be welded with 304 stainless steel to enhance the wear resistance of the equipment and ensure the service life.

[0071] In some embodiments, the water selection unit 3 further includes a water level regulating component (not shown in the figure), which is used to adjust the water level in the water tank 311.

[0072] It can be understood that, in combination with the above structure, the water selection unit 3 is equipped with a spiral conveying device and an adjustable water level design, which optimizes the flow path of the material, can effectively avoid the blockage of residual materials in the water tank 311, and significantly improves the separation efficiency of balsa wood and long fibers, with the separation efficiency reaching more than 92%.

[0073] For example, the water level regulating component includes a water level monitoring device, a water pump, a water pipe and a water tank. The water level monitoring device can be installed in the water tank 311 to monitor the water level in the water tank 311 in real time. The water pipe, water pump and water tank are connected, and the water in the water tank 311 can be pumped into the water tank, or the water in the water tank can be transported to the water tank 311 to achieve the regulation of the water level in the water tank 311.

[0074] In some embodiments, the processing system also includes a control unit (not shown in the figure), which is electrically connected to the wind speed regulating device and the water level regulating assembly, so that the control unit can monitor the sorting process in real time, realize automatic adjustment of the wind speed and water level, and ensure stable sorting effect.

[0075] like Figure 1 As shown, in some embodiments, the processing system further includes a dust removal unit 4, which has at least four air inlets, wherein the four air inlets are respectively connected to the dust removal port of each of the first shredder 11, the second shredder 12, the hammer mill 13 and the air separation unit 2.

[0076] The dust removal unit 4 includes a pulse dust collector, which can more effectively remove dust particles in the air, especially the fine dust generated during the production process, and can effectively improve the working environment, making the dust emission concentration ≤30mg / m 3 .

[0077] For example, the dust removal unit 4 adopts a pulse bag dust collector for negative pressure dust removal, and a variable frequency motor is provided in the dust removal unit 4, which is automatically interlocked and controlled according to the process production conditions (and can also be manually operated) to maximize energy saving and consumption reduction.

[0078] It can be understood that the dust removal unit 4 effectively reduces the dust pollution generated during the processing of retired fan blades, which is in line with the current green and environmentally friendly production concept. Among them, the dust removal port of each of the first shredder 11, the second shredder 12, the hammer crusher 13 and the air selection unit 2 can be connected to the negative pressure device, so that the dust is first filtered by the bag dust collector and then discharged through the fan and the air duct.

[0079] It should be noted that the control unit can also be electrically connected to the first shredder 11, the second shredder 12, the hammer crusher 13, the "Z"-shaped air separation equipment 21, the cyclone separator 22, the fiber separator 23, the wind conveying assembly 24, the first conveying device 32, the second conveying device 33 and the dust removal unit 4 to control the working conditions of each component.

[0080] The control unit may be, for example, a PLC control system, which controls the working conditions of the processing system, thereby effectively improving the degree of automation and sorting accuracy of the processing system.

[0081] In addition, the PLC control system should be able to achieve overall linkage control of crushing and sorting, be designed with built-in protection functions, automatic reversal in case of overload, real-time monitoring of high-speed bearing temperature, and abnormal alarm functions. The PLC control system should have an independent operation cabinet and use a touch screen + button operation method, among which the touch screen is used to facilitate parameter adjustment.

[0082] At the same time, the processing system may also include a camera. The control unit is electrically connected to the camera, and the movement of the processing system can be observed from multiple angles through the camera. The working camera can change with the change of the angle of the working equipment and is always in an observable working position. The camera should take protective measures such as dust covers, and the resolution of all cameras should ensure that the surrounding environment can be clearly observed.

[0083] like Figure 4 As shown, a method for processing retired wind turbine blades according to an embodiment of the present invention includes the following steps:

[0084] Step S1, crushing, placing the retired fan blades in the crushing unit 1 and crushing them to obtain crushed materials;

[0085] Step S2, air separation, wherein the crushed material enters the air separation unit 2 for air separation to separate materials with different specific gravities to obtain residual materials, wherein the materials with different specific gravities include epoxy resin powder and short glass fibers;

[0086] Step S3, water separation, the remaining materials continue to enter the water separation unit 3 for water separation to separate light materials and heavy materials, wherein the light materials include balsa wood and the heavy materials include long fibers.

[0087] The technical advantages of the retired wind turbine blade processing method according to an embodiment of the present invention are the same as the technical advantages of the retired wind turbine blade processing system described above, and will not be repeated here.

[0088] In some embodiments, step S1 is specifically as follows:

[0089] Step S11, primary crushing, placing the retired fan blades in the first shredder 11 for primary crushing to obtain long strips of primary crushed material, wherein the width of the primary crushed material is B1, and B1 is ≤ 100 mm;

[0090] Step S12, secondary crushing, the primary crushed material enters the second shredder 12 for further shredding to obtain a long strip of intermediate material, wherein the width of the intermediate material is B2, and B2 ≤ 50 mm;

[0091] Step S13, crushing, sending the intermediate material into the hammer mill 13 for crushing to obtain crushed material, wherein the particle size of the crushed material is less than or equal to 5 meshes.

[0092] In some embodiments, the wind speed of the air selection unit 2 is adjustable.

[0093] In some embodiments, the liquid level of water in the water tank 311 of the water selection unit 3 is adjustable.

[0094] In some embodiments, the processing method further includes dust removal, whereby the exhaust gas from each of the first shredder 11 , the second shredder 12 , the hammer mill 13 and the air separation unit 2 is passed into the dust removal unit 4 for dust removal.

[0095] Now, in combination with the specific structure of the retired fan blade processing system, its working process is described. Taking the retired fan blade fragments with a specification of ≤ length 1000mm × width 1000mm × thickness 80mm as an example, the cut retired fan blade fragments are sent to the first shredder 11 for primary crushing through the feeding belt conveyor 14, and are crushed into long strips of primary crushed materials with a width of ≤100mm. Then, the primary crushed materials are transported to the second shredder 12 through the feeding belt conveyor 14 and shredded into long strips of intermediate materials with a width of ≤50mm. Under the control of the feeding belt conveyor 14, the hammer crusher 12 is quantitatively fed to the shredder 11. The hammer mill 13 feeds the material, and the intermediate material is crushed into a state within 5 meshes by the hammer mill 13. The intermediate material is then conveyed to the air separation unit 2 by the wind power of the wind conveying component 24, and the epoxy resin powder and short glass fiber are screened and collected respectively. The remaining long glass fiber and balsa wood and other mixed materials are conveyed to the water tank 311 by the first conveying device 32. The remaining materials entering the water tank 311 can separate the balsa wood and long fibers under the buoyancy of the water. In the above process, the exhaust gas in the first shredder 11, the second shredder 12, the hammer mill 13 and the air separation unit 2 can be dedusted by the dust removal unit 4, and the exhaust gas particle emission standard is ≤30mg / Nm 3 , in order to maintain a clean workshop environment.

[0096] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0098] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0099] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0100] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0101] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A retired wind turbine blade processing system, characterized in that: include: A crushing unit, the crushing unit is used to crush retired wind turbine blades; The air separation unit and the water separation unit, the discharge port of the crushing unit, the air separation unit and the water separation unit are connected in sequence, the air separation unit is used to separate materials of different specific gravities in the crushed material by air separation, and the water separation unit is used to separate light materials and heavy materials in the remaining materials by water separation, wherein the materials of different specific gravities include epoxy resin powder and short glass fiber, the remaining materials are the remaining crushed materials after air separation by the air separation unit, the light materials include balsa wood, and the heavy materials include long fibers.

2. The retired wind turbine blade processing system according to claim 1, characterized in that: The air separation unit comprises: A Z-shaped air separation device, wherein the feed port of the Z-shaped air separation device is connected with the discharge port of the crushing unit; A cyclone separator and a fiber separator, wherein the discharge port of the "Z"-shaped air separation device, the cyclone separator, the fiber separator and the water separation unit are connected in sequence; A wind conveying component is connected between the crushing unit, the "Z"-shaped air separation equipment, the cyclone separator and the fiber separator to convey the crushed material by wind.

3. The retired wind turbine blade processing system according to claim 2, characterized in that: There are multiple cyclone separators, and the multiple cyclone separators are connected in sequence to perform multi-stage air separation on the crushed material. All the cyclone separators are connected between the "Z"-shaped air separation equipment and the fiber separator.

4. The retired wind turbine blade processing system according to claim 2, characterized in that: The wind conveying assembly includes a wind speed regulating device for regulating the wind speed of the conveying wind, and the wind speed regulating device is a variable frequency motor.

5. The retired wind turbine blade processing system according to any one of claims 1 to 4, characterized in that: The water selection unit comprises: A machine body, wherein the machine body is provided with a water tank, and the light material and the heavy material in the residual material can be separated under the buoyancy of the water in the water tank; a first conveying device, the first conveying device being located outside the machine body and connected between the discharge port of the air separation unit and the feed port of the water trough to convey the remaining material to the water trough; A second conveying device is provided in the water tank and is used for conveying the remaining material.

6. The retired wind turbine blade processing system according to claim 4, characterized in that: The water selection unit further includes a water level regulating component, which is used to adjust the water level in the water tank.

7. The retired wind turbine blade processing system according to claim 6, characterized in that: It also includes a control unit, which is electrically connected to the wind speed regulating device and the water level regulating assembly.

8. The retired wind turbine blade processing system according to claim 1, characterized in that: The crushing unit includes a first shredder, a second shredder and a hammer mill, the first shredder, the second shredder and the hammer mill are connected in sequence, and the particle size of the output of the first shredder, the particle size of the output of the second shredder and the particle size of the output of the hammer mill decreases in sequence.

9. The retired wind turbine blade processing system according to claim 8, characterized in that: The machine further comprises a dust removal unit, wherein the dust removal unit has at least four air inlets, wherein the four air inlets are respectively connected to the dust removal port of each of the first shredder, the second shredder, the hammer mill and the air separation unit; The dust removal unit includes a pulse dust collector.

10. A method for processing retired wind turbine blades, characterized in that: The treatment method The following steps are involved: Crushing: Place the retired fan blades in the crushing unit and crush them to obtain crushed materials; Air separation, wherein the crushed material enters an air separation unit for air separation to separate materials with different specific gravities to obtain residual materials, wherein the materials with different specific gravities include epoxy resin powder and short glass fibers; Water separation: the remaining materials continue to enter the water separation unit for water separation to separate light materials and heavy materials, wherein the light materials include balsa wood and the heavy materials include long fibers.

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