Device, system and method for recycling retired fan blades

Abstract

The invention discloses a device, system and method for recycling retired fan blades, solves the problems that in the prior art, pyrolysis equipment does not have universality and can only conduct pyrolysis, and the requirement for the temperature of direct pyrolysis of the fan blades is high, and has the beneficial effect of expanding the application range of the device. According to the specific scheme, the device for recycling the retired fan blades comprises a kiln body, the kiln body has the set length, the interior of the kiln body is hollow, an inlet communicated with the hollow position is formed in one end of the kiln body, an outlet communicated with the hollow position is formed in the other end of the kiln body, the inlet and the outlet of the kiln body can be closed or opened, and a conveying mechanism is arranged in the kiln body; the conveying mechanism and the top of the hollow position of the kiln body are arranged at an interval, the kiln body is provided with an air inlet or an air outlet, and a spraying assembly is arranged in the kiln body to spray a swelling agent to the cut-off fan blades and / or a heat supply assembly is arranged in the kiln body to heat the cut-off fan blades.

Description

Technical Field

[0001] This invention relates to the technical field of decommissioned wind turbine blade treatment, and in particular to an apparatus, system and method for recycling and treating decommissioned wind turbine blades. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Wind turbine blades are a crucial component of wind power generation, primarily composed of materials such as glass fiber, carbon fiber, balsa wood, and polyvinyl chloride (PVC). Glass fiber and carbon fiber are thermosetting resin composites, which are chemically and physically stable and difficult to degrade in natural environments. Therefore, to avoid environmental pollution and resource waste, retired wind turbine blades need to be recycled. Existing technologies include pyrolysis for processing wind turbine blades. The purpose of pyrolysis is to recover the glass fiber from the retired blades. Pyrolysis typically involves setting up pyrolysis equipment where the cut wind turbine blades are placed for pyrolysis. However, current pyrolysis equipment suffers from the following problems: Its function is relatively simple, only able to heat the fan blades, and it is not versatile. If other treatments are needed for the fan blades, other equipment is required. Pyrolysis equipment mainly uses microwaves or other methods to heat and decompose the fan blades. However, currently, the fan blades are simply heated, resulting in a slow processing speed. Moreover, the pyrolysis temperature requirement is also high. Excessive pyrolysis temperature can easily cause the fan blades to coke during the pyrolysis process, which can affect the quality of the final recycled glass fiber.

[0004] Existing technologies also provide oxidation equipment for oxidizing cracked fan blades. However, the air introduced into the oxidation equipment is usually on the side of the equipment, resulting in poor uniformity of oxygen supply, which affects the oxidation efficiency.

[0005] In addition, current pyrolysis or oxidation equipment has control gate valves installed at the inlet and outlet to shut down the equipment, resulting in a complex overall structure. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device for recycling and processing decommissioned wind turbine blades. This device is highly versatile and can spray swelling agents onto cut-off wind turbine blades and / or heat the blades.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: A device for recycling and processing decommissioned wind turbine blades includes a kiln body with a predetermined length and a hollow interior. One end of the kiln body has an inlet communicating with the hollow interior, and the other end has an outlet communicating with the hollow interior. Both the inlet and outlet of the kiln body can be closed or opened. A conveying mechanism is installed inside the kiln body, with a distance between the conveying mechanism and the top of the hollow interior of the kiln body. The kiln body has an air inlet and / or an exhaust outlet. A spraying assembly is installed inside the kiln body to spray a swelling agent onto the cut-off wind turbine blades, and / or a heating assembly is installed inside the kiln body to heat the cut-off wind turbine blades.

[0008] As described above, in a device for recycling and processing decommissioned wind turbine blades, when the heating component is installed inside the kiln, the kiln is also equipped with a vent pipe that is connected to the hollow part inside the kiln. A perforated plate is installed inside the kiln, and the perforated plate has multiple through holes that are connected to the vent pipe. The perforated plate is arranged on both sides of the top of the hollow part inside the kiln, and the through holes in the perforated plate are arranged in multiple rows and columns. The diameter of the through holes is 1 / 20 to 1 / 5 of the diameter of the vent pipe. Ventilation pipes are installed at the top and / or sides and / or bottom of the kiln body.

[0009] As described above, in a device for recycling and processing decommissioned wind turbine blades, end plates are respectively provided at both ends of the kiln body. The end plates are detachable from the kiln body, and the inlet or outlet is provided at the end plate.

[0010] As described above, a device for recycling and processing decommissioned wind turbine blades includes a spraying assembly comprising spray pipes disposed within the kiln body. Multiple spray pipes are arranged along the width direction of the kiln body, and each spray pipe is provided with multiple nozzles. The heating assembly includes heating pipes disposed within the kiln body, with multiple heating pipes arranged along the width direction of the kiln body.

[0011] As described above, in a device for recycling and processing decommissioned wind turbine blades, the conveying mechanism is a chain plate conveying mechanism. The chain plate conveying mechanism is connected to a driving power source located outside the kiln body. The chain plate conveying mechanism includes a chain. A chain support plate is provided inside the kiln body to support the upper side of the chain. A chain protection plate is also provided inside the kiln body. The chain protection plate is bent and located above the chain.

[0012] As described above, a device for recycling and processing decommissioned wind turbine blades includes a temperature sensor installed outside the kiln and a pressure sensor installed inside the kiln. The temperature sensor and the pressure sensor are respectively connected to a controller, and the controller is respectively connected to the spraying assembly, the heating assembly, and the conveying mechanism. A support is installed at the bottom of the kiln body to support the kiln body and keep it at a set height. The longitudinal section of the kiln body is an unequal-sided octagonal section.

[0013] As described above, in a device for recycling and processing decommissioned wind turbine blades, a transfer device is provided at least one end of the kiln body. The transfer device includes a shell with openings at both ends. The openings of the shell can be connected to and communicate with the inlet or outlet of the kiln body. A material conveying mechanism is provided inside the shell, and the openings of the shell are closed by a rotatable rotor inside the shell.

[0014] As described above, a device for recycling and processing decommissioned wind turbine blades includes a rotor disposed within a housing. The rotor is rotatable relative to the housing. The rotor has a cavity capable of accommodating materials, and the cavity has a material inlet. A baffle is formed circumferentially around the cavity by the rotor, with the material inlet located at the baffle. The area of ​​the baffle circumferentially around the rotor is greater than half the sum of the circumferential area of ​​the rotor and the area of ​​the material inlet, while the area of ​​the baffle is less than four-fifths of the circumferential area of ​​the rotor, so as to close the opening of the housing during rotor rotation.

[0015] Secondly, the present invention also provides a decommissioned wind turbine blade recycling and processing system, comprising at least three of the aforementioned decommissioned wind turbine blade recycling and processing devices, with multiple kilns arranged sequentially, the aforementioned spraying component being installed in the first kiln, and the aforementioned heating component being installed in both the second and third kilns.

[0016] Thirdly, the present invention also provides a method for operating a device for recycling and processing decommissioned wind turbine blades, comprising the following: The cut fan blades are fed into the kiln through the kiln inlet; Close the kiln's inlet and outlet; A swelling agent is sprayed onto the cut-off fan blades through a spraying assembly inside the kiln to swell the cut-off fan blades, and the volatilized swelling agent is discharged through the exhaust port. Alternatively, protective gas can be introduced into the kiln through the air inlet, and the heating components can supply heat to the kiln to pyrolyze the cut-off fan blades. The gas produced by pyrolysis can be discharged through the exhaust port.

[0017] The beneficial effects of the present invention are as follows: 1) The device provided by this invention has a reasonable overall structure. The spraying component inside the kiln can spray the swelling agent onto the cut-off fan blades in the kiln, which helps to reduce the stability of the epoxy resin cross-linking structure in the fan blades and promotes subsequent pyrolysis. This device can be used alone for spraying the swelling agent, or it can be used alone for pyrolysis of the fan blades. Alternatively, a set of devices can be used to spray the swelling agent first, and then pyrolyze the fan blades after a set time. During the pyrolysis process, protective gas can be introduced through the air inlet, and the volatile swelling agent can be discharged through the exhaust port during the spraying process. This greatly expands the scope of application of the device and has a certain degree of versatility.

[0018] 2) The device of the present invention can spray a swelling agent onto the wind turbine blades. The swelling agent diffuses into the interior of the material and attacks the benzene ring structure of the epoxy resin by generating oxygen free radicals, causing the dense structure of the blades to expand and layer, and the surface to present a porous structure. Spraying the swelling agent onto the wind turbine blades is beneficial for subsequent pyrolysis operations, effectively improving heat and mass transfer in the depolymerization process, accelerating resin decomposition, controlling the pyrolysis temperature, inhibiting the formation of pyrolysis carbon, and helping to reduce the oxidation temperature in the oxidation process.

[0019] 3) The device provided by the present invention can also be used for the oxidation reaction after the pyrolysis of the fan blades. The kiln body is equipped with a ventilation pipe and a perforated plate is installed inside the kiln body. The through holes of the perforated plate are connected to the ventilation pipe. This allows oxygen to enter the device in a more uniform state and react with the pyrolyzed fan blades to carry out the oxidation reaction, effectively improving the oxidation efficiency and oxidation quality.

[0020] 4) The conveying mechanism in this invention is reasonably set up. The conveying mechanism is used to convey the cut fan blades. The upper side of the chain is effectively supported by the chain support plate to ensure the operation of the conveying mechanism. The chain protection plate is also set in the kiln body to effectively protect the chain.

[0021] 5) In this invention, at least one end of the kiln body is provided with a transfer device. By connecting the transfer device with the kiln body, multiple kiln bodies can be connected. There is no need to set switch valves at the kiln body inlet and outlet. It is only necessary to close the end of the transfer device. For the scheme of setting a rotor inside the shell, the opening or closing of the cavity opening can be achieved by rotating the rotor, which can also achieve the shut-off of the kiln body inlet and outlet, effectively simplifying the kiln body structure. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of a device for recycling and processing decommissioned wind turbine blades according to one or more embodiments of the present invention, used as a pretreatment kiln.

[0024] Figure 2 This is a cross-sectional view of a device for recycling and processing decommissioned wind turbine blades according to one or more embodiments of the present invention, used as a pretreatment kiln.

[0025] Figure 3 This is the present invention. Figure 2 A schematic diagram of section AA.

[0026] Figure 4 This is the present invention. Figure 3 Enlarged diagram of point B in the middle.

[0027] Figure 5 This is a schematic diagram of a device for recycling and processing decommissioned wind turbine blades according to one or more embodiments of the present invention, used as a pyrolysis kiln.

[0028] Figure 6 This is a cross-sectional view of a decommissioned wind turbine blade recycling and processing device according to one or more embodiments of the present invention, when used as a pyrolysis kiln.

[0029] Figure 7 This is a schematic diagram of an apparatus for recycling and processing decommissioned wind turbine blades according to one or more embodiments of the present invention, used as an oxidation kiln. Figure 1 .

[0030] Figure 8 This is a schematic diagram of a decommissioned wind turbine blade recycling and processing device according to one or more embodiments of the present invention, used as a pyrolysis kiln. Figure 2 .

[0031] Figure 9 This is a schematic diagram of a decommissioned wind turbine blade recycling and processing device according to one or more embodiments of the present invention, used as a pyrolysis kiln. Figure 3 .

[0032] Figure 10 This is a schematic diagram of a decommissioned wind turbine blade recycling and processing system according to one or more embodiments of the present invention.

[0033] Figure 11 This is a schematic diagram of a transfer device in a decommissioned wind turbine blade recycling system according to one or more embodiments of the present invention.

[0034] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0035] Among them: 1. Material pallet, 2. Transfer device, 3. Pretreatment kiln, 4. Pyrolysis kiln, 5. Oxidation kiln; 21. Housing; 22. Support; 23. Rotor; 24. Baffle; 25. Gas inlet / outlet; 26. First motor; 27. Second motor; 28. Material conveying mechanism; 29. ​​Support ring. 31. Kiln body; 32. Front end plate; 33. Rear end plate; 34. Rib plate; 35. Air inlet or exhaust port; 36. Spray pipe; 361. Nozzle; 37. Temperature sensor; 38. Conveying mechanism; 39. Exhaust port; 310. Radiant heating pipe; 311. Ventilation pipe; 3111. Perforated plate; 312. Support. 381. Drive motor; 382. Chain plate; 383. Sprocket; 384. Chain; 385. Chain support plate; 386. Chain guard plate. Detailed Implementation

[0036] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As introduced in the background section, existing pyrolysis equipment is not universal and can only perform pyrolysis. Furthermore, direct pyrolysis of wind turbine blades requires high temperatures. In order to solve the above technical problems, this invention proposes a device for recycling and processing retired wind turbine blades.

[0038] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 , Figure 2 As shown, a device for recycling and processing decommissioned wind turbine blades includes a kiln body 31 with a predetermined length. The kiln body 31 is hollow inside. One end of the kiln body 31 has an inlet communicating with the hollow part, and the other end of the kiln body 31 has an outlet communicating with the hollow part. Both the inlet and outlet of the kiln body 31 can be closed or opened. A conveying mechanism is provided inside the kiln body, and the conveying mechanism is spaced apart from the top of the hollow part of the kiln body 31. The kiln body 31 is provided with an air inlet and / or an exhaust outlet. A spraying component is provided inside the kiln body 31 to spray a swelling agent onto the cut-off wind turbine blades and / or a heating component is provided inside the kiln body to heat the cut-off wind turbine blades. The cut-off wind turbine blades are placed in a tray to form a material tray 1.

[0039] The kiln body 31 is equipped with a spraying assembly to form a pretreatment kiln 3, which can spray a swelling agent onto the cut-off fan blades in the kiln body. This helps to reduce the stability of the epoxy resin cross-linking structure in the fan blades and promotes subsequent pyrolysis. This device can be used alone for spraying the swelling agent or alone for pyrolysis of the fan blades to form a pyrolysis kiln 4. Alternatively, a single device can be used to spray the swelling agent first, and then pyrolyze the fan blades after a set time. During the pyrolysis process, protective gas can be introduced through the air inlet, and the volatile swelling agent can be discharged through the exhaust port during the spraying process. This greatly expands the application range of the device and has a certain degree of versatility.

[0040] The kiln body 31 is made of corrosion-resistant materials, such as 310S stainless steel. Its cross-section is an unequal-sided octagonal shape, such as... Figure 3As shown, circular or rectangular cross sections can also be used, but unequal-sided octagonal cross sections are preferred because this cross section has a smaller cross-sectional area while meeting the width requirements of material tray 1, which can reduce the volume of kiln body 31, save materials, reduce heating volume, and improve thermal efficiency. The length of the kiln body is sufficient to accommodate at least one or more material trays 1. The kiln body 31 has a front end plate 32 at the air inlet and a rear end plate 33 at the discharge end, each with an inlet and an outlet. The dimensions of the inlet and outlet are adapted to the dimensions of the material tray 1 to facilitate the loading and unloading of the material tray 1. The front end plate 32 and the rear end plate 33 are connected to the kiln body 31 in a detachable or partially detachable manner, for example, by bolts, to facilitate the maintenance and replacement of the internal conveying mechanism of the kiln body 31. Multiple ribs 34 are provided along the length of the outer side of the kiln body 31 to strengthen its structure. Figure 2 Support structure for insulation or protective layer (not shown). The cross-sectional shape of rib 34 is consistent with the cross-sectional shape of kiln body 31.

[0041] It should be explained that an air inlet or an exhaust outlet 35 is provided at the top of the kiln body 31 for the discharge of volatile swelling agent; or for the introduction of hot air according to the swelling process to maintain the ambient temperature required by the process; or for the introduction of nitrogen to reduce the risk of oxygen / air entering the pyrolysis kiln 4 when the material tray 1 enters the subsequent process pyrolysis kiln 4.

[0042] When the kiln body 31 is used as a pretreatment kiln, the spraying assembly includes spray pipes 36 installed in the kiln body. Multiple spray pipes 36 are installed along the width direction of the kiln body, so that the spraying trajectory covers the entire length of the material tray 1. Each spray pipe is equipped with multiple nozzles 361, and the spraying trajectory covers the entire width of the material tray 1.

[0043] A temperature sensor 37 is installed outside the kiln body 31, and a pressure sensor is installed inside the kiln body 31. The temperature sensor and the pressure sensor are respectively connected to the controller. The controller is a PLC controller or other type of controller. The controller is respectively connected to the spraying assembly, the heating assembly and the conveying mechanism. The controller realizes the control of each mechanism. Supports 312 are provided at the bottom of the kiln body. The kiln body 31 is supported by multiple supports 312, so that the kiln body 31 is kept at a set height. Multiple supports 312 can be provided. The longitudinal section of the supports 312 can be Z-shaped. The bottom side of the supports 312 is bent to facilitate fixing to the ground. The supports 312 can also be height-adjustable supports.

[0044] A conveying mechanism is provided inside the kiln body 31. One or more conveying mechanisms 38 can be provided along the length of the kiln body 31, and are not limited to one. The conveying mechanism 38 can adopt various conventional and well-known mechanisms suitable for conveying material pallets 1, such as chain plates, rollers, etc.

[0045] In this embodiment, the conveying mechanism 38 is a chain conveyor mechanism. The conveying mechanism 38 includes two rotating rollers, with sprockets 383 at both ends of the rotating rollers, a chain plate 382 between the two rotating rollers, and a chain 384 between the sprockets 383 of the two rotating rollers. One of the rotating rollers is connected to a drive power source located outside the kiln body 31. The drive power source is a drive motor 381. (Refer to...) Figure 4 As shown, a chain support plate 385 is installed inside the kiln body 31 to support the upper side of the chain. The rotating roller contacts the chain support plate 385, which provides support force to prevent sagging caused by excessive chain length and load. This improves the stress conditions of the chain 384, extends its lifespan, and reduces maintenance cycles. A chain guard plate 386 is also installed inside the kiln body 31. The chain guard plate 386 is bent and positioned above the chain 384, with one side of the chain guard plate 386 placed inside the chain 384. The chain guard plate 386 prevents the swelling agent from being directly sprayed onto the surface of the chain 384, thus preventing corrosion. In the pyrolysis kiln 4 and oxidation kiln 5 modules, the chain guard plate 386 also prevents the radiant heating device from directly radiating the chain.

[0046] In addition, the lower part of the kiln body 31 is provided with a discharge port 39 for the residual liquid of the swelling agent, which is used to discharge the splashed residual liquid.

[0047] refer to Figure 5 and Figure 6 As shown, when the processing device is a pyrolysis kiln, the pyrolysis kiln 4 differs from the pretreatment kiln 3 in that: the air inlet or exhaust port 35 of the pyrolysis kiln 4 is used to introduce nitrogen and discharge pyrolysis gas, and at least one air inlet or exhaust port 35 is set as a safety vent to prevent overpressure; in this embodiment, the pyrolysis kiln 4 does not have a swelling agent spray pipe 36, but instead has two sets of multiple radiant heating pipes 310 or microwave heating devices on both sides as heating components.

[0048] To further broaden versatility, when a heating component is installed inside the kiln body 31, the kiln body 31 is also equipped with a vent pipe. The vent pipe connects to the hollow interior of the kiln body 31. A perforated plate 3111 is installed inside the kiln body 31, with multiple through holes that connect to the vent pipe. The perforated plate 3111 is arranged on both sides of the top of the kiln body 31, meaning the outer side of the top of the kiln body 31 is solid, while the interior of the top of the kiln body 31 is hollow and connected to the vent pipe 311. The perforated plate 3111 is arranged along the length of the kiln body 31, with multiple rows and columns of through holes. The diameter of the through holes is 1 / 20 to 1 / 5 of the diameter of the vent pipe 311. Figure 7 , Figure 8 and Figure 9As shown, the vent pipes 311 are arranged at the top and / or sides and / or bottom of the kiln body 31, thus forming an oxidation kiln 5. The purpose of using the perforated plate 3111 is to ensure uniform distribution of oxygen within the kiln body 31. The vent pipes 311 and the perforated plate 3111 have three arrangement methods: vent pipes 311 are respectively installed at the bottom, sides, and top of the kiln body 31. The vent pipes 311 can be long pipes, and the vent pipes are connected to the kiln body 31 through multiple branch pipes. When hot air is supplied to the bottom of the kiln body 31, the air inlet or exhaust port 35 can be located at the bottom of the kiln body 31.

[0049] At least one end of the kiln body is provided with a transfer device 2. The transfer device 2 includes a shell 21 with openings at both ends. The openings of the shell 21 can be connected to and communicate with the inlet or outlet of the kiln body 31. The connection means that the opening of the shell can be detachably connected to the inlet or outlet of the kiln body by bolts. A material conveying mechanism 28 is provided inside the shell 21. The material conveying mechanism 28 adopts a chain or roller conveying mechanism. The opening of the shell 21 is closed by a rotatable rotor 23 inside the shell 21.

[0050] refer to Figure 11 As shown, the housing 21 is supported by a bracket 22. A rotor 23 is disposed inside the housing 21 and is rotatable relative to the housing 21. The rotor has a cavity capable of accommodating material, and a material inlet is provided within the cavity. A baffle 24 is formed circumferentially around the rotor 23, with the material inlet located at the baffle 24. The baffle 24 has a predetermined thickness. The area of ​​the baffle 24 circumferentially around the rotor 23 is greater than half the sum of the circumferential area of ​​the rotor 23 and the area of ​​the material inlet, while the area of ​​the baffle 24 is less than four-fifths of the circumferential area of ​​the rotor 23, so as to facilitate rotation. During the rotation of rotor 23, the opening of housing 21 is closed. Gas inlet / outlet 25 is provided at the top of housing 21. First motor 26 passes through the top of housing 21 and is connected to rotor 23. The output shaft of second motor 27 passes through the bottom of housing 21 and the bottom of rotor 23 and is connected to material conveying mechanism 28 inside rotor 23. Material conveying mechanism 28 includes multiple rollers. Driven sprockets are provided at the ends of the rollers. The output shaft of second motor is connected to drive roller. Driven sprockets are provided at the ends of drive rollers. A chain is arranged around drive sprockets and driven sprockets.

[0051] Furthermore, a sealing strip is provided at the opening of the rotor 23, and the sealing strip can contact the housing 21 to ensure sealing during the rotation of the rotor 23.

[0052] Support rings 29 are respectively provided between the upper part of rotor 23, the lower part of rotor 23 and housing 21. The support rings 29 are rigid annular parts. The support rings provide support and sealing for the upper and lower parts of rotor 23 to prevent protective gas from leaking between rotor 23 and housing 21.

[0053] Example 2 This embodiment provides a decommissioned wind turbine blade recycling and processing system, referencing... Figure 10 As shown, the device includes at least three of the three embodiments of a retired wind turbine blade recycling and processing device. Multiple kilns 31 are arranged in sequence. The first kiln 31 is equipped with a spraying component, and the second and third kilns 31 are equipped with heating components. The third kiln is also equipped with a ventilation pipe and a perforated plate. The modular structure can recover larger-sized fibers, improve the value of recycled fibers, and facilitate manufacturing, reduce costs, and is suitable for expanding the processing capacity, making it easy to achieve large-scale processing.

[0054] A transfer device 2 is installed between adjacent kilns. In the pretreatment kiln 3, large pieces of material are sprayed with a swelling agent for pretreatment. The pretreated material then enters the pyrolysis kiln 4 through the transfer device 2 for pyrolysis. Under an oxygen-free / oxygen-deficient environment, pyrolysis produces pyrolysis solids and gases. The pyrolysis gas generated in the pyrolysis kiln 4 is extracted by an induced draft device and transported to the incinerator for combustion to produce high-temperature flue gas. The high-temperature flue gas can be directly introduced into the heating components. The pyrolysis solids are transported to the oxidation kiln 5 along with the material tray 1 through the transfer isolation device 2. After pyrolysis, the pyrolysis carbon adhering to the fiber surface of the pyrolysis solids undergoes an oxidation reaction with oxygen in the oxidation kiln 5, generating oxidation flue gas. This oxidizing flue gas is extracted by an induced draft device and transported to the incinerator for combustion to produce high-temperature flue gas. The high-temperature flue gas can be directly introduced into the heating components. The recovered fibers, after low-temperature oxidation to remove the pyrolysis carbon, are sent out on the material tray 1 through the transfer device 2 for cooling. After cooling, the glass / carbon fiber is recovered.

[0055] Pretreatment kiln 3, pyrolysis kiln 4, and oxidation kiln 5 adopt the same structure and modular design of the conveying mechanism, with identical interfaces. Different lengths can be designed according to different process residence times. This modular design facilitates engineering implementation, allowing for module configuration and expansion based on varying actual engineering throughput.

[0056] Example 3 This embodiment provides a method for operating a device for recycling and processing decommissioned wind turbine blades, including the following: The cut fan blades are fed into the kiln through the kiln inlet; Close the kiln's inlet and outlet; A swelling agent is sprayed onto the cut-off fan blades through a spraying assembly inside the kiln to swell the cut-off fan blades, and the volatilized swelling agent is discharged through the exhaust port. Alternatively, protective gas can be introduced into the kiln through the air inlet, and the heating components can supply heat to the kiln to pyrolyze the cut-off fan blades. The gas produced by pyrolysis can be discharged through the exhaust port.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for recycling and processing decommissioned wind turbine blades, characterized in that, The system includes a kiln body with a set length and a hollow interior. One end of the kiln body has an inlet communicating with the hollow interior, and the other end has an outlet communicating with the hollow interior. Both the inlet and outlet of the kiln body can be closed or opened. A conveying mechanism is installed inside the kiln body, with a distance between the conveying mechanism and the top of the hollow interior of the kiln body. The kiln body has an air inlet and / or an exhaust outlet. A spraying assembly is installed inside the kiln body to spray a swelling agent onto the cut fan blades and / or a heating assembly is installed inside the kiln body to heat the cut fan blades.

2. The device for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, When the heating components are installed in the kiln body, the kiln body is also equipped with a vent pipe that is connected to the hollow part of the kiln body. A perforated plate is installed in the kiln body, and the perforated plate has multiple through holes that are connected to the vent pipe. The perforated plate is arranged on both sides of the top of the hollow part of the kiln body, and the through holes in the perforated plate are arranged in multiple rows and columns. The diameter of the through holes is 1 / 20 to 1 / 5 of the diameter of the vent pipe. Ventilation pipes are installed at the top and / or sides and / or bottom of the kiln body.

3. The device for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, End plates are respectively provided at both ends of the kiln body. The end plates are detachable from the kiln body, and the inlet or outlet is provided at the end plate.

4. The device for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, The spraying assembly includes spray pipes disposed inside the kiln body, with multiple spray pipes arranged along the width direction of the kiln body, and each spray pipe being provided with multiple nozzles. The heating assembly includes heating pipes disposed within the kiln body, with multiple heating pipes arranged along the width direction of the kiln body.

5. The apparatus for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, The conveying mechanism is a chain plate conveying mechanism, which is connected to a driving power source located outside the kiln body. The chain plate conveying mechanism includes a chain, and a chain support plate is provided inside the kiln body to support the upper side of the chain. A chain guard plate is also provided inside the kiln body, which is bent and located above the chain.

6. The apparatus for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, A temperature sensor is installed outside the kiln, and a pressure sensor is installed inside the kiln. The temperature sensor and the pressure sensor are respectively connected to a controller. The controller is respectively connected to the spraying assembly, the heating assembly and the conveying mechanism. Supports are installed at the bottom of the kiln body, and the longitudinal section of the kiln body is an unequal-sided octagonal section.

7. The apparatus for recycling and processing decommissioned wind turbine blades according to claim 1, characterized in that, At least one end of the kiln body is provided with a transfer device. The transfer device includes a shell with openings at both ends. The openings of the shell can be connected to and communicate with the inlet or outlet of the kiln body. A material conveying mechanism is provided inside the shell. The openings of the shell are closed by a rotatable rotor inside the shell.

8. The apparatus for recycling and processing decommissioned wind turbine blades according to claim 7, characterized in that, The rotor is disposed inside the housing and is rotatable relative to the housing. The rotor has a cavity inside that can accommodate materials. The cavity has a material inlet. The rotor forms a baffle in the circumferential direction of the cavity. The material inlet is located at the baffle. The area of ​​the baffle in the circumferential direction of the rotor is greater than half of the circumferential area of ​​the rotor and the area of ​​the material inlet. The area of ​​the baffle is less than 4 / 5 of the circumferential area of ​​the rotor, so as to close the opening of the housing during the rotation of the rotor.

9. A system for recycling and processing decommissioned wind turbine blades, characterized in that, The device includes at least three of the following claims: a device for recycling and processing decommissioned wind turbine blades, wherein multiple kilns are arranged in sequence, the spraying assembly is arranged in the first kiln, and the heating assembly is arranged in the second and third kilns.

10. The operating method of the device for recycling and processing decommissioned wind turbine blades according to any one of claims 1-8, characterized in that, Includes the following: The cut fan blades are fed into the kiln through the kiln inlet; Close the kiln's inlet and outlet; A swelling agent is sprayed onto the cut-off fan blades through a spraying assembly inside the kiln to swell the cut-off fan blades, and the volatilized swelling agent is discharged through the exhaust port. Alternatively, protective gas can be introduced into the kiln through the air inlet, and the heating components can supply heat to the kiln to pyrolyze the cut-off fan blades. The gas produced by pyrolysis can be discharged through the exhaust port.

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