A device, system and method for recycling and processing decommissioned wind turbine blades

Abstract

The application discloses a kind of retired fan blade recycling processing device, system and method, solve the problem that pyrolysis equipment in the prior art does not have universality can only be pyrolyzed, and the temperature requirement is higher to fan blade direct pyrolysis, with the beneficial effect of expanding device application category, specific scheme is as follows: a kind of retired fan blade recycling processing device, including kiln body, kiln body has set length, hollow is set in the inside of kiln body, the entrance is set in communication with hollow portion in one end of kiln body, the outlet is set in communication with hollow portion in the other end of kiln body, the entrance and outlet of kiln body can be closed or can be opened, conveying mechanism is set in kiln body, interval distance is set between conveying mechanism and the top of hollow portion in kiln body, kiln body is provided with air inlet or exhaust port, spraying assembly is arranged in the inside of kiln body to spray swelling agent to cut fan blade and / or heat supply component is arranged in the inside of kiln body to heat disconnected fan blade.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of retired wind turbine blade processing, and in particular to a device, system and method for recycling retired wind turbine blades. BACKGROUND

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

[0003] The wind turbine blade is one of the important components of wind power generation, which is mainly composed of glass fiber, carbon fiber, balsa wood and polyvinyl chloride (PVC) and other materials. Among them, glass fiber and carbon fiber are thermosetting resin composites, and the physicochemical properties of thermosetting composites are stable and difficult to degrade in natural environment. Therefore, in order to avoid pollution of the environment and waste of resources, it is necessary to recycle the retired wind turbine blades. In the prior art, pyrolysis is used to process the wind turbine blades. The purpose of pyrolysis is to recover glass fiber from the retired wind turbine blades. The pyrolysis device is usually set up, and the cut wind turbine blades are put into the pyrolysis device for pyrolysis. The current pyrolysis device has the following problems:

[0004] The function is relatively single, and only heating of the wind turbine blade can be achieved, which is not universal. If other processing of the wind turbine blade is needed, other equipment needs to be used for processing.

[0005] The pyrolysis device mainly pyrolyzes the wind turbine blade by means of microwaves or other methods. However, the wind turbine blade is only heated at present, which leads to a slow processing speed of the wind turbine blade and a high temperature requirement for pyrolysis. The high pyrolysis temperature is easy to cause coking of the wind turbine blade during pyrolysis, which easily affects the quality of the recovered glass fiber.

[0006] There is also an oxidation device in the prior art, which is used to oxidize the pyrolyzed wind turbine blade. However, the air introduced into the oxidation device is usually introduced into the side of the device, which leads to poor uniformity of the introduced oxygen, thereby affecting the oxidation efficiency.

[0007] In addition, the inlet and outlet of the current pyrolysis device or oxidation device are respectively provided with control gate valves to close the pyrolysis device or oxidation device, and the overall structure is complex. SUMMARY

[0008] In view of the deficiencies in the prior art, the purpose of the present application is to provide a device for recycling retired wind turbine blades, which has high universality and can realize spraying of swelling agent on the cut wind turbine blades and / or heating of the wind turbine blades.

[0009] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0010] A device for recycling and processing retired fan blades, comprising a kiln body, the kiln body having a set length, the inside of the kiln body being hollow, an inlet being arranged at one end of the kiln body and communicating with the hollow part, an outlet being arranged at the other end of the kiln body and communicating with the hollow part, the inlet and the outlet of the kiln body being closable or openable, a conveying mechanism being arranged in the kiln body, the conveying mechanism being arranged at a distance from the top of the hollow part of the kiln body, the kiln body being provided with an air inlet and / or an air outlet, a spraying assembly being arranged in the kiln body to spray a swelling agent on the cut fan blades, and / or a heat supply assembly being arranged in the kiln body to heat the cut fan blades.

[0011] The device for recycling and processing retired fan blades as described above, when the heat supply assembly is arranged in the kiln body, the kiln body is further provided with an air pipe, the air pipe communicating with the hollow part in the kiln body, a perforated plate being arranged in the kiln body, the perforated plate having a plurality of through holes, the through holes communicating with the air pipe, the perforated plate being arranged on both sides of the top of the hollow part in the kiln body, the through holes in the perforated plate being arranged in multiple rows and columns, the diameter of the through holes being 1 / 20-1 / 5 of the diameter of the air pipe.

[0012] The air pipe is arranged at the top and / or side and / or bottom of the kiln body.

[0013] The device for recycling and processing retired fan blades as described above, the two ends of the kiln body are respectively provided with end plates, the end plates being detachable relative to the kiln body, the inlet or the outlet being arranged at the end plates.

[0014] The device for recycling and processing retired fan blades as described above, the spraying assembly comprises a plurality of spraying pipes arranged in the kiln body, each spraying pipe being provided with a plurality of nozzles.

[0015] The heat supply assembly comprises a plurality of heat supply pipes arranged in the kiln body.

[0016] The device for recycling and processing retired fan blades as described above, the conveying mechanism is a chain plate conveying mechanism, the chain plate conveying mechanism being connected to a driving power source arranged outside the kiln body, the chain plate conveying mechanism comprising a chain, a chain support plate being arranged in the kiln body to support the upper side of the chain, a chain protection plate being further arranged in the kiln body, the chain protection plate being bent and arranged above the chain.

[0017] The device for recycling and processing retired fan blades as described above, a temperature sensor is arranged outside the kiln body, a pressure sensor is arranged in the kiln body, the temperature sensor and the pressure sensor being respectively connected to a controller, the controller being respectively connected to the spraying assembly, the heat supply assembly and the conveying mechanism.

[0018] The kiln body is provided with a support at the bottom, the kiln body is supported by the support, the kiln body is kept at a set height, and the longitudinal section of the kiln body is an unequal octagon section.

[0019] The device for recycling and processing of retired fan blades as described above, at least one end of the kiln body is provided with a transfer device, the transfer device includes a shell, the shell is provided with an opening at both ends, the opening of the shell can be connected and communicated with the inlet or outlet of the kiln body, a material conveying mechanism is arranged in the shell, and the opening of the shell is closed by a rotatable rotor in the shell.

[0020] The device for recycling and processing of retired fan blades as described above, the rotor is arranged in the shell and can rotate relative to the shell, the rotor has a cavity capable of accommodating materials inside, the cavity is provided with a material port, the rotor forms a baffle in the circumferential direction of the cavity, the material port is arranged at the baffle, the area of the baffle in the circumferential direction of the rotor is greater than the sum of 1 / 2 of the area of the circumferential direction of the rotor and the area of the material port, and the area of the baffle is less than 4 / 5 of the area of the circumferential direction of the rotor, so as to close the opening of the shell during rotation of the rotor.

[0021] In the second aspect, the application further provides a system for recycling and processing of retired fan blades, which comprises at least three devices for recycling and processing of retired fan blades as described above, a plurality of kiln bodies are arranged in sequence, the first kiln body is provided with the spraying assembly, and the second kiln body and the third kiln body are both provided with the heat supply assembly.

[0022] In the third aspect, the application further provides a working method of the device for recycling and processing of retired fan blades, which comprises the following contents.

[0023] The cut fan blades are sent into the kiln body through the inlet of the kiln body;

[0024] The inlet and the outlet of the kiln body are closed;

[0025] The cut fan blades are sprayed with the swelling agent by the spraying assembly in the kiln body to swell the cut fan blades, and the volatilized swelling agent is discharged through the exhaust port;

[0026] Alternatively, the protective gas is introduced into the kiln body through the air inlet of the kiln body, the heat supply assembly supplies heat to the kiln body to pyrolyze the cut fan blades, and the gas generated by pyrolysis is discharged through the exhaust port.

[0027] The beneficial effects of the application are as follows:

[0028] 1) The device provided by the present application has reasonable overall structure, the spray assembly arranged in the kiln body can spray swelling agent to the fan blade cut off in the kiln body, which is conducive to reducing the stability of the cross-linking structure of the epoxy resin in the fan blade and promoting subsequent cracking, so that the device can be used for spraying swelling agent alone, or can be used for pyrolyzing the fan blade alone, or can be used for spraying swelling agent first and then pyrolyzing the fan blade after setting time, protective gas can be introduced through the air inlet during pyrolysis, and the volatilized swelling agent can be discharged through the exhaust port during the swelling agent spraying process, thereby sufficiently widening the use range of the device and having certain universality.

[0029] 2) The device can spray swelling agent to the fan blade, the swelling agent diffuses into the material, generates oxygen free radicals to attack the benzene ring structure of the epoxy resin, makes the dense structure of the blade expand and delaminate, and the surface presents a porous structure, which is beneficial to subsequent pyrolysis after spraying the swelling agent to the fan blade, effectively improves the heat and mass transfer in the depolymerization process, accelerates the decomposition of the resin, controls the pyrolysis temperature, inhibits the generation of pyrolysis carbon, and is conducive to reducing the oxidation temperature in the oxidation process.

[0030] 3) The device provided by the present application can also be used for the oxidation reaction after pyrolysis of the fan blade, the kiln body is provided with an air pipe, and a perforated plate is arranged in the kiln body, the through holes of the perforated plate are communicated with the air pipe, so that oxygen can enter the device in a more uniform state and react with the pyrolyzed fan blade, thereby effectively improving the oxidation efficiency and oxidation quality.

[0031] 4) The conveying mechanism in the present application is reasonably arranged, the conveying mechanism is used for conveying the cut fan blade, the upper side of the chain is effectively supported through the arrangement of the chain support plate, the work of the conveying mechanism is guaranteed, and a chain protection plate is further arranged in the kiln body to effectively protect the chain.

[0032] 5) At least one end of the kiln body in the present application is provided with a transfer transition device, the transfer transition device is connected with the kiln body, the connection of multiple kiln bodies can be realized, a switch valve does not need to be arranged at the inlet and outlet of the kiln body, and the end of the transfer transition device can be closed, for the scheme in which a rotor is arranged in the shell, the opening and closing of the cavity opening can be realized through the rotation of the rotor, the inlet and outlet of the kiln body are closed, and the structure of the kiln body is effectively simplified. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings accompanying the specification of the present application form a part of the present application and serve to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application.

[0034] Figure 1 is a schematic view of a device for recycling and processing retired fan blades according to one or more embodiments of the present application as a pretreatment kiln.

[0035] Figure 2 is a cross-sectional view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as a pre-treatment kiln.

[0036] Figure 3 is a schematic view of section A-A in the present invention. Figure 2

[0037] Figure 4 is a schematic view of section B in the present invention. Figure 3

[0038] Figure 5 is a schematic view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as a pyrolysis kiln.

[0039] Figure 6 is a cross-sectional view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as a pyrolysis kiln.

[0040] Figure 7 is a schematic view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as an oxidation kiln. Figure 1

[0041] Figure 8 is a schematic view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as a pyrolysis kiln. Figure 2

[0042] Figure 9 is a schematic view of a device for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention as a pyrolysis kiln. Figure 3

[0043] Figure 10 is a schematic view of a system for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention.

[0044] Figure 11 is a schematic view of a transfer device in a system for recycling and processing of decommissioned wind turbine blades according to one or more embodiments of the present invention.

[0045] In the figures, the mutual distances or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic views are merely schematic.

[0046] wherein: 1. material tray, 2. transfer device, 3. pre-treatment kiln, 4. pyrolysis kiln, 5. oxidation kiln.

[0047] ​​​​​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;

[0048] 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, discharge port, 310, radiant heating pipe, 311, air pipe, 3111, perforated plate, 312, support;

[0049] 381, drive motor, 382, chain plate, 383, sprocket, 384, chain, 385, chain support plate, 386, chain guard plate. DETAILED DESCRIPTION

[0050] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in order to provide a thorough understanding of the exemplary embodiments according to the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application pertains.

[0051] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the terms "comprises", "comprising", "includes", "including", "contains", "containing" and the like are used in the sense of "including but not limited to".

[0052] As introduced in the background, the pyrolysis device in the prior art does not have versatility and can only pyrolyze, and direct pyrolysis of the fan blade has a higher requirement on temperature, in order to solve the above technical problems, the application provides a device for recycling and processing retired fan blades.

[0053] Example one

[0054] In a typical embodiment of the application, reference is made to Figure 1 , Figure 2As shown, a device for recycling and processing of decommissioned fan blades, comprising a kiln body 31, the kiln body 31 has a set length, the inside of the kiln body 31 is hollow, one end of the kiln body 31 is provided with an inlet communicating with the hollow part, the other end of the kiln body 31 is provided with an outlet communicating with the hollow part, the inlet and outlet of the kiln body 31 can be closed or opened, a conveying mechanism is arranged in the kiln body, the conveying mechanism is arranged at a distance 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 air outlet, a spraying assembly is arranged inside the kiln body 31 to spray swelling agent on the cut fan blades, and / or a heating assembly is arranged inside the kiln body to heat the cut fan blades, the cut fan blades are placed in a tray to form a material tray 1.

[0055] A spraying assembly is arranged inside the kiln body 31 to form a pretreatment kiln 3, which can spray swelling agent on the cut fan blades in the kiln body, which is beneficial to reduce the stability of the cross-linked structure of the epoxy resin in the fan blade and promote subsequent cracking. Therefore, this device can be used alone for spraying swelling agent, and can be used alone for pyrolysis of fan blades to form a pyrolysis kiln 4. It can also be a set of devices to first spray swelling agent and then pyrolyze the fan blades after a set time. During the pyrolysis process, protective gas can be introduced through the air inlet. During the swelling agent spraying process, the volatilized swelling agent can be discharged through the air outlet. This fully broadens the use range of the device and has certain universality.

[0056] The kiln body 31 is made of corrosion-resistant material, such as stainless steel 310S. Its cross section adopts an irregular octagonal cross section, as shown in Figure 3 As shown, a circular, rectangular or other cross section can also be used, and an irregular octagonal cross section is preferred because it has a smaller cross-sectional area under the condition of meeting the width of the material tray 1, which can reduce the volume of the kiln body 31, save materials, and reduce the heating volume, improve thermal efficiency, and the length of the kiln body meets the requirement of accommodating at least one or more material trays 1;

[0057] The air inlet of the kiln body 31 is provided with a front end plate 32, and the discharge end is provided with a rear end plate 33, which respectively has an inlet and an outlet, the size of the inlet and outlet is matched with the size of the material tray, so as to facilitate the entry and exit of the material tray 1. The front end plate 32 and the rear end plate 33 are connected with the kiln body 31 by a detachable or partially detachable connection structure, such as a bolt connection, so as to facilitate the maintenance and replacement of the conveying mechanism inside the kiln body 31. A plurality of rib plates 34 are arranged on the outside of the kiln body 31 along the length direction, which are used for strengthening the strength of the kiln body 31, and the rib plates serve Figure 2 as a support structure for the heat preservation layer or the protective layer which is not shown. The cross-sectional shape of the rib plate 34 is consistent with the cross-sectional shape of the kiln body 31.

[0058] It needs to be explained that the top of the kiln body 31 is provided with an air inlet or exhaust port 35 for the discharge of the volatile swelling agent; or according to the swelling process, hot air is introduced to maintain the required ambient temperature of the process; or nitrogen is introduced to reduce the risk of oxygen / air entering the pyrolysis kiln 4 when the material tray 1 enters the subsequent process.

[0059] When the kiln body 31 is used as a pretreatment kiln, the spraying assembly includes a spraying pipe 36 arranged in the kiln body, and a plurality of spraying pipes 36 are arranged along the width direction of the kiln body, so that the spraying track range covers the entire length of the material tray 1. Each spraying pipe is provided with a plurality of nozzles 361, and the spraying track range covers the entire width of the material tray 1.

[0060] A temperature sensor 37 is arranged outside the kiln body 31, and a pressure sensor is arranged inside the kiln body 31. The temperature sensor and the pressure sensor are respectively connected with a controller, which is a PLC controller or other type of controller. The controller is connected with the spraying assembly, the heat supply assembly and the conveying mechanism respectively, and realizes control of each mechanism.

[0061] A support 312 is arranged at the bottom of the kiln body 31, which supports the kiln body 31 at a set height through a plurality of supports 312. The support 312 can be provided with a plurality of supports 312, and the longitudinal section of the support 312 can be a few characters. The bottom side of the support 312 is bent to facilitate fixation to the ground, and the support 312 can also be an adjustable height support.

[0062] A conveying mechanism is arranged inside the kiln body 31. The conveying mechanism 38 can be arranged in one or more along the length direction of the kiln body 31, and is not limited to one. The conveying mechanism 38 can adopt various commonly known mechanisms suitable for conveying the material tray 1, such as chain plates, rollers, etc.

[0063] In this embodiment, the conveying mechanism 38 selects a chain plate conveying mechanism. The conveying mechanism 38 includes two rotating rollers, and chain wheels 383 are arranged at both ends of the rotating rollers. Chain plates 382 are arranged between the two rotating rollers, and chains 384 are arranged between the chain wheels 383 of the two rotating rollers. One of the rotating rollers is connected with a driving power source arranged outside the kiln body 31, which is a driving motor 381. Referring to Figure 4As shown, chain support plate 385 is arranged in kiln body 31 to support the upper side of chain 384, and the rotating roller is in contact with chain support plate 385, which provides a supporting force to prevent the chain from sagging due to its length and weight, improve the stress condition of chain 384, prolong its service life and maintenance cycle. Chain protection plate 386 is also arranged in kiln body 31, which is bent and arranged above chain 384, and one side of chain protection plate 386 is arranged on the inner side of chain 384. Chain protection plate 386 prevents the chain 384 from being directly sprayed with swelling agent during spraying, thereby preventing corrosion of the chain 384. In the pyrolysis kiln 4 and oxidation kiln 5 modules, the chain protection plate 386 has the function of preventing the chain from being directly radiated by the radiation heating device.

[0064] In addition, the lower part of kiln body 31 is provided with a swelling agent residue discharge port 39 for discharging splashed residue.

[0065] Reference Figure 5 and Figure 6 As shown, when the processing device is a pyrolysis kiln, the pyrolysis kiln 4 and the pretreatment kiln 3 have the following differences: the gas inlet or gas outlet 35 of the pyrolysis kiln 4 is used to introduce nitrogen and discharge pyrolysis gas, and at least one of the gas inlets or gas outlets 35 is arranged as a safety vent to prevent overpressure; in this embodiment, the pyrolysis kiln 4 does not have a swelling agent spraying pipe 36, but is provided with two groups of multiple radiation heating pipes 310 or microwave heating devices as heating components on both sides.

[0066] To further broaden the versatility, when the heating components are arranged in the kiln body 31, the kiln body 31 is also provided with an air pipe, which is in communication with the hollow space in the kiln body 31. A perforated plate 3111 is arranged in the kiln body 31, which has a plurality of through holes in communication with the air pipe. The perforated plate 3111 is arranged on both sides of the top of the kiln body 31, i.e. the outside of the top of the kiln body 31 is solid, and the inside of the top of the kiln body 31 is hollow to communicate with the air pipe 311. The perforated plate 3111 is arranged along the length direction of the kiln body 31. The through holes in the perforated plate 3111 are arranged in multiple rows and columns, and the diameter of the through holes is 1 / 20-1 / 5 of the diameter of the air pipe 311. Figure 7 、 Figure 8 and Figure 9 As shown, the air pipe 311 is arranged on the top and / or side and / or bottom of the kiln body 31, so that the device forms an oxidation kiln 5. The purpose of using the perforated plate 3111 is to uniformly distribute oxygen in the kiln body 31. The air pipe 311 and the perforated plate 3111 have three arrangement modes: the air pipe 311 is arranged on the bottom, side and top of the kiln body 31 respectively. The air pipe 311 can be a long pipe, and the air pipe communicates with the kiln body 31 through multiple branch pipes. When hot air is supplied at the bottom of the kiln body 31, the gas inlet or gas outlet 35 can be arranged at the bottom of the kiln body 31.

[0067] At least one end of the kiln body is provided with a transfer transition device 2, the transfer transition device 2 comprises a shell 21, the shell 21 is provided with openings at both ends, the openings of the shell 21 can be connected and communicated with the inlet or outlet of the kiln body 31, the connection means that the openings of the shell can be detachably connected with the inlet or outlet of the kiln body through bolts, a material conveying mechanism 28 is arranged in the shell 21, the material conveying mechanism 28 adopts a chain or a roller conveying mechanism, and the openings of the shell 21 are closed by a rotatable rotor 23 in the shell 21.

[0068] Reference Figure 11 As shown in the figure, the shell 21 is supported by a support 22, the shell 21 is provided with a rotor 23, the rotor 23 is rotatable relative to the shell 21, the rotor has a cavity capable of accommodating materials inside, the cavity is provided with a material port, the rotor 23 forms a baffle 24 in the circumferential direction of the cavity, the material port is arranged at the baffle 24, the baffle 24 has a set thickness, the area of the baffle 24 in the circumferential direction of the rotor 23 is greater than the sum of 1 / 2 of the circumferential area of the rotor 23 and the area of the material port, and the area of the baffle 24 is less than 4 / 5 of the circumferential area of the rotor 23, so as to close the openings of the shell 21 during rotation of the rotor 23, a gas inlet / outlet 25 is arranged at the top of the shell 21, a first motor 26 is connected with the rotor 23 through the top of the shell 21, an output shaft of a second motor 27 is connected with a material conveying mechanism 28 in the interior of the rotor 23 after penetrating through the bottom of the shell 21 and the bottom of the rotor 23, the material conveying mechanism 28 comprises a plurality of rollers, the end of each roller is provided with a driven sprocket, the output shaft of the second motor is connected with a driving roller, the end of the driving roller is provided with a driving sprocket, and a chain is arranged around the driving sprocket and the driven sprocket.

[0069] Moreover, a sealing strip is arranged at the opening of the rotor 23, the sealing strip can be in contact with the shell 21 to ensure sealing during rotation of the rotor 23.

[0070] Support rings 29 are respectively arranged between the upper part of the rotor 23, the lower part of the rotor 23 and the shell 21, the support rings 29 are rigid annular members, the arrangement of the support rings realizes the support and sealing of the upper and lower parts of the rotor 23, so as to avoid leakage of the protective gas from between the rotor 23 and the shell 21.

[0071] Embodiment two

[0072] The embodiment provides a retired fan blade recycling system, referring to Figure 10 As shown in the figure, the shell 21 is supported by a support 22, the shell 21 is provided with a rotor 23, the rotor 23 is rotatable relative to the shell 21, the rotor has a cavity capable of accommodating materials inside, the cavity is provided with a material port, the rotor 23 forms a baffle 24 in the circumferential direction of the cavity, the material port is arranged at the baffle 24, the baffle 24 has a set thickness, the area of the baffle 24 in the circumferential direction of the rotor 23 is greater than the sum of 1 / 2 of the circumferential area of the rotor 23 and the area of the material port, and the area of the baffle 24 is less than 4 / 5 of the circumferential area of the rotor 23, so as to close the openings of the shell 21 during rotation of the rotor 23, a gas inlet / outlet 25 is arranged at the top of the shell 21, a first motor 26 is connected with the rotor 23 through the top of the shell 21, an output shaft of a second motor 27 is connected with a material conveying mechanism 28 in the interior of the rotor 23 after penetrating through the bottom of the shell 21 and the bottom of the rotor 23, the material conveying mechanism 28 comprises a plurality of rollers, the end of each roller is provided with a driven sprocket, the output shaft of the second motor is connected with a driving roller, the end of the driving roller is provided with a driving sprocket, and a chain is arranged around the driving sprocket and the driven sprocket.

[0073] The device comprises a transition device 2 arranged between two adjacent kiln bodies, a pre-treatment kiln 3, a pyrolysis kiln 4, and an oxidation kiln 5. In the pre-treatment kiln 3, a swelling agent is sprayed on the large block of material for pre-treatment. The large block of material after the swelling pre-treatment is transferred into the pyrolysis kiln 4 through the transition device 2 for pyrolysis. In the oxygen-free or oxygen-deficient environment, the pyrolysis generates pyrolysis solid and gas. The pyrolysis gas generated in the pyrolysis kiln 4 is extracted by an air induction device and transported to a burning furnace for burning to generate high-temperature flue gas, which can be directly introduced into a heat supply assembly. The pyrolysis solid is transported to the oxidation kiln 5 with the material tray 1 through the transition device 2. The pyrolysis carbon attached to the surface of the fiber in the pyrolysis solid is oxidized with oxygen in the oxidation kiln 5 to generate oxidation flue gas, which is extracted by an air induction device and transported to a burning furnace for burning to generate high-temperature flue gas, which can be directly introduced into a heat supply assembly. The recovered fiber after the low-temperature oxidation and the removal of the pyrolysis carbon is sent out on the material tray 1 through the transition device 2 and can be cooled after the recovery of the glass / carbon fiber.

[0074] The pre-treatment kiln 3, the pyrolysis kiln 4, and the oxidation kiln 5 adopt the same structure and modular design of the conveying mechanism, have the same interface, and can be designed in different lengths according to different process residence times. The modular design is beneficial to the implementation of engineering and can be configured and expanded according to the actual engineering processing capacity.

[0075] Embodiment three

[0076] The embodiment provides a working method of a device for recycling and processing a retired fan blade.

[0077] The cut fan blade is sent into the kiln body through the inlet of the kiln body;

[0078] The inlet and the outlet of the kiln body are closed;

[0079] The swelling agent is sprayed on the cut fan blade through the spraying assembly in the kiln body to swell the cut fan blade, and the volatilized swelling agent is discharged through the exhaust port.

[0080] Alternatively, the protective gas is introduced into the kiln body through the gas inlet of the kiln body, the heat supply assembly supplies heat to the kiln body to pyrolyze the cut fan blade, and the gas generated by the pyrolysis is discharged through the exhaust port.

[0081] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for recycling and processing decommissioned wind turbine blades, characterized in that, The device includes at least three devices for recycling and processing decommissioned wind turbine blades. Multiple kilns are arranged sequentially. A spraying component is installed in the first kiln, and a heating component is installed in the second and third kilns. The device for recycling and processing decommissioned wind turbine blades includes a kiln with a predetermined length. The kiln is hollow inside. One end of the kiln is provided with an inlet communicating with the hollow part, and the other end of the kiln is provided with an outlet communicating with the hollow part. Both the inlet and outlet of the kiln can be closed or opened. A conveying mechanism is provided inside the kiln. The conveying mechanism is spaced apart from the top of the hollow part of the kiln. The kiln is provided with an air inlet and / or an exhaust outlet. A spraying component is provided inside the kiln to spray a swelling agent onto the cut-off wind turbine blades and / or a heating component is provided inside the kiln to heat the cut-off wind turbine blades. The spraying assembly includes spray pipes disposed within 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. At least one end of the kiln body is provided with a transfer device, which 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. The rotor is installed inside the housing and is rotatable relative to the housing. The rotor has a cavity that can accommodate materials. The cavity is provided with 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 1 / 2 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. A gas inlet or outlet is provided at the top of the housing. A first motor passes through the top of the housing and connects to the rotor. The output shaft of a second motor passes through the bottom of the housing and the bottom of the rotor and connects to the material conveying mechanism inside the rotor. The material conveying mechanism includes multiple rotating rollers, with driven sprockets at the ends of the rollers. The output shaft of the second motor is connected to a driving roller, with a driving sprocket at the end of the driving roller. A chain is arranged around the driving and driven sprockets. A sealing strip is provided at the rotor opening, which can contact the housing to ensure sealing during rotor rotation. Support rings are provided between the upper and lower parts of the rotor and the housing. The support rings are rigid annular pieces. The support rings provide support and sealing for the upper and lower parts of the rotor to prevent protective gas from leaking between the rotor and the housing. The modular structure enables the recycling of larger-sized fibers, increasing the value of recycled fibers. At the same time, the modular structure facilitates manufacturing, reduces costs, and is suitable for expanding processing capacity, making it easy to achieve large-scale disposal.

2. The decommissioned wind turbine blade recycling and processing system 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 decommissioned wind turbine blade recycling and processing system 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 decommissioned wind turbine blade recycling and processing system 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.

5. The decommissioned wind turbine blade recycling and processing system 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.

6. The working method of the decommissioned wind turbine blade recycling and processing system according to any one of claims 1-5, 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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