A reactor system and method for pyrolysis recycling of fibers from waste fan blades

Abstract

The application belongs to the technical field of waste fan blade pyrolysis recycling, and particularly discloses a waste fan blade pyrolysis recycling fiber reactor system and method, which comprises: sequentially arranged loading, pyrolysis and cooling sections, and automatic cut-off doors are arranged between the pyrolysis section and the loading section and between the pyrolysis section and the cooling section; tracks are respectively arranged in the loading, pyrolysis and cooling sections, the cut fan blades are loaded in the carrier vehicles, the carrier vehicles loaded with the fan blades are connected in series, and the carrier vehicles can move along the tracks between the loading, pyrolysis and cooling sections. The application adopts a three-section independent structure to realize the loading pyrolysis, fiber decarburization and product cooling process of the waste fan blades; the pyrolysis section can intermittently convey the carrier vehicles, the reaction time can be controlled, the pyrolysis of the fan blades can be ensured to be complete, and the blades with insufficient pyrolysis can be re-pyrolyzed through the carrier vehicles.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis recycling technology for waste wind turbine blades, and in particular to a pyrolysis recycling reactor system and method for fiber recycling from waste 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] With the upgrading and decommissioning of wind power equipment, the rational recycling and utilization of a large number of discarded wind turbine blades has become an urgent problem to be solved. The materials used to produce wind turbine blades are complex, and resource recycling is quite difficult. The main methods for material processing are machining, direct landfill, chemical dissolution, incineration, and pyrolysis. However, the maturity of these methods varies, and few technologies have reached the level of industrial-scale production.

[0004] Mechanical processing generates dust pollution and reduces material strength; direct landfill occupies and pollutes land, resulting in resource waste; chemical dissolution reactions are difficult to control, producing waste liquid that pollutes the environment; incineration has low combustion efficiency and produces waste residue and exhaust gas; pyrolysis can completely decompose materials and has a high resource recovery rate, making it the most promising method. Pyrolysis of wind turbine blades yields fiber products, tar, and pyrolysis exhaust gas, among other products. The fibers retain their surface morphology and certain mechanical properties, allowing for recycling.

[0005] Conventional pyrolysis treatment methods for wind turbine blades can be divided into two types: For larger wind turbine blades, traditional equipment such as fixed beds, kilns, and muffle furnaces can be used for processing, but the intermittent operation of the equipment results in high energy consumption and low processing efficiency; while continuous processing equipment such as fluidized beds, rotary kilns, and moving beds require the material to be in granular form, which requires crushing or even pulverizing large-sized wind turbine blades. This process will damage the fiber structure, impair the fiber mechanical strength, and reduce its quality, making it difficult to reuse it in the manufacture of wind turbine blades. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes a pyrolysis reactor system and method for recovering fibers from waste wind turbine blades. The system employs a three-stage process to achieve pyrolysis of waste wind turbine blades, fiber decarbonization, and product cooling. By using a loading vehicle to classify and package wind turbine blades of different sizes and locations, excessive cutting of the blades can be avoided, effectively solving the problem of severely broken waste wind turbine blades preventing fiber reuse.

[0007] In some implementations, the following technical solutions are adopted:

[0008] A pyrolysis reactor system for recovering fibers from waste wind turbine blades includes:

[0009] The loading section, pyrolysis section, and cooling section are arranged in sequence. Automatic shut-off doors are provided between the pyrolysis section and the loading section, and between the pyrolysis section and the cooling section, respectively, to achieve sealing of the pyrolysis section.

[0010] The loading section, pyrolysis section and cooling section are each equipped with a track. The cut fan blades are loaded into the material carriers. Multiple material carriers carrying fan blades are connected in series and can move along the track between the loading section, pyrolysis section and cooling section.

[0011] As a further solution, after the loading section is filled, the material carrier moves to the pyrolysis section for pyrolysis and decarburization, while the loading section loads the next batch of material carriers; after the wind turbine blades are pyrolyzed and decarburized in the pyrolysis section, they are moved by the material carrier to the cooling section for cooling, while the next batch of loaded material carriers enters the pyrolysis section, so as to achieve continuous operation.

[0012] As a further solution, two automatic shut-off doors are provided between the pyrolysis section and the filling section. One automatic shut-off door is used to close one end of the pyrolysis section, and the other automatic shut-off door is used to close one end of the filling section. After the two automatic shut-off doors are closed, inert gas is filled between the two automatic shut-off doors to seal them.

[0013] Two automatic shut-off doors are installed between the pyrolysis section and the cooling section. One automatic shut-off door is used to close the other end of the pyrolysis section, and the other automatic shut-off door is used to close the other end of the cooling section. After the two automatic shut-off doors are closed, inert gas is filled between the two automatic shut-off doors to seal them.

[0014] As a further solution, a sealing structure is provided on the side wall of each automatic shut-off door that contacts the corresponding work section.

[0015] As a further embodiment, the pyrolysis section includes: a reactor furnace body arranged along the track direction, and a pyrolysis chamber arranged along the track direction within the reactor furnace body; the pyrolysis chamber is fixed within the reactor furnace body by means of a pyrolysis chamber support; the track is arranged through the pyrolysis chamber, and multiple burners are provided at the bottom of the pyrolysis chamber, the burners being connected to a natural gas inlet pipe and an air inlet pipe respectively.

[0016] As a further embodiment, the bottom of the pyrolysis chamber is an inclined structure, with the lower end connected to the pyrolysis oil storage tank via a pyrolysis oil outlet pipeline; the pyrolysis oil storage tank is connected to the burner via a pyrolysis oil circuit; and the pyrolysis gas outlet pipeline at the top of the pyrolysis chamber is connected to the burner via an exhaust gas treatment device and an induced draft fan.

[0017] The pyrolysis oil produced during the pyrolysis process flows out through the pyrolysis oil outlet pipeline and is temporarily stored in the pyrolysis oil storage tank; part of the pyrolysis oil enters the burner for re-combustion through the pyrolysis oil circuit.

[0018] The pyrolysis gas produced during the pyrolysis process is treated as exhaust gas and then re-enters the burner for re-combustion via an induced draft fan.

[0019] As a further solution, based on the different pyrolysis temperatures of different wind turbine blades, the pyrolysis chamber is divided into multiple temperature zones along the track direction, with each temperature zone having a different pyrolysis temperature;

[0020] Temperature detectors are installed in each temperature zone to collect the temperature of the pyrolysis chamber in each zone and feed the temperature back to the proportional controller, which in turn controls the opening of the automatic valves in the natural gas intake pipeline and the air intake pipeline to control the combustion temperature of the burners in different temperature zones.

[0021] As a further embodiment, the material carrier is equipped with multiple independent compartments, each containing cut fan blades; all contact surfaces between the material carrier and the fan blades are designed as screen structures to facilitate the entry of reaction gas and the discharge of pyrolysis oil.

[0022] Multiple sets of reactive gas inlets are located in the bottom space of the material carrier. The reactive gas is introduced into the reactive gas inlets through the reactive gas inlet pipe so that the reactive gas can fully and evenly contact the fan blades in the material carrier.

[0023] In other embodiments, the following technical solutions are adopted:

[0024] A method for operating a pyrolysis reactor system for recovering fibers from waste wind turbine blades includes:

[0025] The cut wind turbine blades are placed on multiple loading vehicles in the filling section. After filling is completed, the loading vehicles are moved to the pyrolysis section and sealed. At the same time, the filling section begins filling the next batch of loading vehicles.

[0026] The wind turbine blades undergo pyrolysis and decarburization in the pyrolysis section. After pyrolysis and decarburization are completed, they are moved to the cooling section by a material carrier for cooling. At the same time, the next batch of material carriers that have been filled enters the pyrolysis section to achieve continuous operation.

[0027] As a further solution, the wind turbine blades undergo pyrolysis and decarburization processes in the pyrolysis section, specifically as follows:

[0028] After the material truck enters the pyrolysis section, the pyrolysis section is sealed.

[0029] Natural gas and air are introduced into the burner for combustion, providing corresponding heat to the combustion chambers of different temperature zones in the pyrolysis section;

[0030] During pyrolysis, the fan blades decompose upon heating to produce pyrolysis oil and pyrolysis gas. The pyrolysis oil is recovered to the pyrolysis oil storage tank and then enters the burner for further combustion; the pyrolysis gas is treated and then transported to the burner for further combustion.

[0031] After pyrolysis is completed, reaction gas is evenly introduced into the interior of the loading vehicle from bottom to top through the reaction gas inlet pipe to achieve the decarbonization process.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) The present invention adopts a three-stage independent structure to realize the filling pyrolysis, fiber decarbonization and product cooling process of waste wind turbine blades; the pyrolysis section is an independent reactor that can complete the two processes of pyrolysis and decarbonization. The reaction time can be controlled by intermittent conveying by the material carrier to ensure that the wind turbine blades are completely pyrolyzed; blades that are not fully pyrolyzed can be re-pyrolyzed by the material carrier.

[0034] The pyrolysis reaction is carried out under an inert atmosphere, and the decarbonization reaction is completed under a reaction atmosphere. After cooling by cooling air, the material can be discharged. After the loading is completed, the loading car enters the pyrolysis section. After the pyrolysis reaction is completed, the loading car immediately enters the cooling section to cool down. At the same time, the subsequent loading cars re-enter the pyrolysis section, realizing continuous production operation.

[0035] (2) The pyrolysis section of this invention is an independent sealed structure, using an automatic shut-off door to achieve mechanical sealing, and injecting an inert gas (such as nitrogen) between the two shut-off doors to achieve gas sealing, thereby achieving a high degree of sealing of the pyrolysis section. The fan blades can remain stationary during the pyrolysis and decarburization process, ensuring the integrity of the fiber structure. The reaction gas is introduced from the bottom of the pyrolysis chamber and gradually diffuses upwards, making more thorough contact with the fan blades.

[0036] The reactor pyrolysis chamber can accommodate multiple material-carrying vehicles. The pyrolysis temperature varies at different positions of the fan blades. By controlling the gas temperature, zoned temperature control can be achieved, improving energy utilization and avoiding energy waste.

[0037] When the number of waste wind turbine blades processed reaches a certain scale, the pyrolysis oil generated can be collected and burned in the burner to provide heat. The pyrolysis flue gas contains a large amount of organic components, which can also provide heat after dust removal and combustion in the burner. This achieves the self-sufficiency of the reactor's thermal energy and reduces production costs.

[0038] (3) Each section of the present invention can accommodate multiple material carriers connected in series at the same time. Each material carrier can be designed according to the blade size, and wind turbine blades of different sizes and positions can be classified and packaged to adapt to waste wind turbine blades of different sizes. This can avoid excessive cutting of the blades and effectively solve the problem of the fiber being unable to be reused due to severe breakage of waste wind turbine blades, thus greatly improving the product value.

[0039] The interior of the material carrier can be divided into multiple independent compartments, which avoids problems such as uneven heating due to the stacking of fan blades, resulting in excessively high local temperatures that damage the fiber structure, the collapse and stacking of the structure due to gravity, insufficient contact between the reaction gas and the fan blades, and difficulty in the discharge of pyrolysis oil.

[0040] (4) Compared with traditional static pyrolysis equipment, the system of the present invention is more convenient for feeding and discharging materials and has higher production efficiency; compared with traditional dynamic pyrolysis equipment, the system of the present invention can ensure the high quality structure of the product, avoid excessive cutting of the blades and damage to the structure during the pyrolysis process, and ensure product quality.

[0041] Other features and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the pyrolysis and fiber recovery reactor system for waste wind turbine blades in an embodiment of the present invention;

[0043] Figure 2 This is a radial cross-sectional view of the pyrolysis section in an embodiment of the present invention;

[0044] Among them, A1 is the filling section, A2 is the pyrolysis section, and A3 is the cooling section;

[0045] 1. Automatic shut-off door; 2. Sealing structure; 3. Track; 4. Flexible seal; 5. Cargo trolley; 6. Reactor body; 7. Pyrolysis chamber; 8. Pyrolysis chamber support; 8-1. Fixed support; 8-2. Expansion support; 9. Track support; 10. Track wheels; 11. Burner; 12. Furnace shell temperature detector; 13. Pyrolysis chamber temperature detector; 14. Pyrolysis chamber pressure detector; 15. Organic exhaust gas treatment device; 16. First induced draft fan; 17. Exhaust gas treatment device; 18. Second induced draft fan; 19. Cooling section exhaust gas pipeline; 20. Pyrolysis oil outlet pipeline; 21. Pyrolysis oil storage tank; 22. Pyrolysis oil circuit; 23. Reaction gas inlet pipeline; 24. Reaction gas inlet; 25. Cooling air inlet. Detailed Implementation

[0046] 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.

[0047] 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, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. 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.

[0048] Example 1

[0049] In one or more embodiments, a pyrolysis reactor system for recovering fibers from waste wind turbine blades is disclosed, combined with Figure 1 Specifically, it includes a loading section A1, a pyrolysis section A2, and a cooling section A3 set up in sequence. Through pyrolysis, decarbonization, and product cooling processes, waste wind turbine blades can obtain high-quality fiber products.

[0050] Automatic shut-off doors are installed between the pyrolysis section A2 and the filling section A1, and between the pyrolysis section A2 and the cooling section A3, to achieve sealing of the pyrolysis section.

[0051] Specifically, two automatic shut-off doors 1 are installed between the pyrolysis section and the filling section. One automatic shut-off door contacts the pyrolysis section to seal one end of the pyrolysis section, and the other automatic shut-off door contacts the filling section to seal one end of the filling section. A sealing structure 2, such as a seal supported by high-temperature resistant fiber or flexible graphite, is installed on the side wall of each automatic shut-off door that contacts the corresponding section to ensure a good seal. After the two automatic shut-off doors are closed, an inert gas, such as nitrogen, is filled between them. The injection of nitrogen creates a slightly positive pressure environment in the pyrolysis section, thus preventing external air from seeping in.

[0052] It should be noted that the automatic shut-off door uses conventional structural selections for automatic opening and closing control and inert gas injection. For example, the automatic shut-off door can be opened and closed by electric control; a toothed structure can be left on the inner wall of the pyrolysis section that contacts the automatic shut-off door, and external inert gas can be introduced into the gap of the toothed structure to form an air seal.

[0053] Similarly, two automatic shut-off gates are installed between the pyrolysis section and the cooling section. One automatic shut-off gate contacts the pyrolysis section to seal off the other end of the pyrolysis section, and the other automatic shut-off gate contacts the cooling section to seal off one end of the cooling section. A sealing structure is provided on the side wall of each automatic shut-off gate that contacts the corresponding section to ensure a sealing effect. After the two automatic shut-off gates are closed, inert gas is filled between the two automatic shut-off gates to form an air seal.

[0054] The main purpose of setting up the automatic shut-off door in this embodiment is to achieve mechanical and gas sealing of the pyrolysis section, preventing outside air from entering the pyrolysis section during the pyrolysis and decarburization process and affecting the reaction effect.

[0055] In this embodiment, a track 3 is installed through the filling section, pyrolysis section and cooling section respectively. The cut fan blades are loaded into the material carrier 5. Multiple material carriers 5 carrying fan blades are connected together and can move along the track between the filling section A1, pyrolysis section A2 and cooling section A3.

[0056] Specifically, grooves are provided on the tracks between the filling section and the pyrolysis section, and on the tracks between the pyrolysis section and the cooling section, at positions corresponding to the automatic cutting doors, so that the automatic cutting doors can fit tightly with the tracks when closed to ensure a sealing effect. At the same time, the size of the grooves is smaller than the diameter of the track wheels 10 on the material carrier, so that the material carrier can pass smoothly through the groove positions, ensuring that the material carrier can stably enter the pyrolysis section and the cooling section from the filling section.

[0057] After cutting, the blowers are loaded onto the loading car 5 in the loading section. After loading, the loading car moves the blowers to the pyrolysis section for pyrolysis and decarbonization. At the same time, the loading section loads the next batch of loading cars. The blower blades undergo pyrolysis and decarbonization in the pyrolysis section. After the reaction is completed, the loading car moves the blades to the cooling section for cooling. At the same time, the next batch of loading cars goes to the pyrolysis section to achieve continuous operation. During the operation, the reactor furnace does not cool down, so that the heat of the pyrolysis section is fully utilized, avoiding the energy consumption problem caused by heating and cooling, saving reaction time, improving production efficiency, and enabling large-scale processing of waste blower blades.

[0058] In this embodiment, the filling section A1 includes a filling chamber and a track installed inside the chamber. The track is fixed and supported by a track support to ensure that the track height is aligned with the height of the pyrolysis section. In the filling section, waste blower blades can be loaded into the independent compartment of the material carrier by manual or mechanical feeding. The screen-like bottom plate inside the compartment can be pulled out for easy loading. After each material carrier is full, it stops on the track in the filling section A1. After the previous batch of material has been pyrolyzed and decarbonized, the automatic shut-off gates at the pyrolysis section inlet and the filling section outlet open, and the material carriers in the filling section A1 enter the pyrolysis section A2 under the action of thrust.

[0059] Combination Figure 2The specific structure of the pyrolysis section includes: a reactor furnace body 6 arranged along the length of the track, and a pyrolysis chamber 7 arranged within the reactor furnace body 6 along the length of the track; the pyrolysis chamber 7 is fixed within the reactor furnace body 6 by a pyrolysis chamber support 8; the track 3 is fixed to the bottom of the pyrolysis chamber through a through-hole and aligned with the track of the filling section A1; as an optional implementation, the pyrolysis chamber support can adopt an expansion support structure, specifically: a roller is provided on the fixed support. As a specific example: the support at the rightmost end of the pyrolysis chamber is a fixed support 8-1, and the remaining supports are expansion supports 8-2; a flexible seal 4 is reserved between the edge of the end face of the pyrolysis chamber and the reactor furnace body, and the flexible seal 4 is filled with high-temperature resistant flexible filler. Since the track is close to the bottom of the pyrolysis chamber, both will expand when heated. The expansion support at the bottom of the pyrolysis chamber is a roller type, which facilitates the expansion and movement of the pyrolysis chamber and the track and squeezes the high-temperature resistant flexible filler to achieve a sealing effect.

[0060] The bottom of the pyrolysis chamber is equipped with multiple burners 11; each burner 11 is a device that generates heat by burning gas or oil, and each burner is connected to the natural gas intake pipeline and the air intake pipeline respectively; based on the different pyrolysis temperatures of different fan blades, the pyrolysis chamber is divided into multiple temperature zones along the track length, and each temperature zone has a different pyrolysis temperature; a pyrolysis chamber temperature detector 13 is installed in each temperature zone to collect the pyrolysis chamber temperature of each temperature zone and feed the temperature back to the proportional controller, which then controls the opening of the automatic valves in the natural gas intake pipeline and the air intake pipeline to control the combustion temperature of the burners in different temperature zones, thereby achieving zoned temperature control, improving energy utilization, and avoiding energy waste.

[0061] The heating method of pyrolysis chamber 7 can be pyrolysis gas, pyrolysis oil, gasoline or diesel, combustible gas or waste heat recovery, etc. It is equipped with multiple burners, and the number of burners can be increased according to the pyrolysis effect of the product. The combustion exhaust gas is treated and discharged in compliance with standards.

[0062] In this embodiment, the bottom of the pyrolysis chamber 7 is an inclined structure, and the lower end of the inclined structure is connected to the pyrolysis oil storage tank 21 through the pyrolysis oil outlet pipeline; the pyrolysis oil storage tank 21 is connected to the burner 11 through the pyrolysis oil circuit 22; the pyrolysis gas outlet pipeline at the top of the pyrolysis chamber is connected to the burner 11 through the organic tail gas treatment device 15 and the first induced draft fan 16; the top of the reactor furnace body 6 is provided with a tail gas outlet, and the combustion tail gas is discharged through the tail gas outlet, treated by the tail gas treatment device 17, and discharged by the second induced draft fan 18 after meeting the standards.

[0063] Multiple sets of reactive gas inlets 24 are located in the bottom space of the material carrier. Reactive gas is introduced into reactive gas inlets 24 through reactive gas inlet pipe 23. The reactive gas can pass through the fan blades on the material carrier from bottom to top, so that the reactive gas can fully and evenly contact the fan blades in the material carrier.

[0064] In this embodiment, the pyrolysis section involves two processes: pyrolysis and decarburization, as detailed below:

[0065] Pyrolysis process: After the loading car enters the pyrolysis section A2, the two automatic shut-off doors between the pyrolysis section and the loading section automatically close, and nitrogen gas is injected between the two automatic shut-off doors to achieve gas sealing.

[0066] At the beginning of pyrolysis, natural gas is introduced through the valve at the front end of the pyrolysis oil storage tank 21, and enters the burner 11 through the pyrolysis oil circuit 22. Air enters the burner through the tail gas pipeline 19 of the cooling section. Multiple burners are arranged at the bottom of the pyrolysis chamber. A furnace shell temperature detector 12 is installed in the reactor furnace body to monitor and provide feedback on the temperature inside the furnace body in real time. A pyrolysis chamber temperature detector 13 and a pyrolysis chamber pressure detector 14 are respectively installed in the pyrolysis chamber to monitor and provide feedback on the temperature and pressure inside the pyrolysis chamber in real time, so as to determine whether the temperature and pressure meet the requirements.

[0067] As the temperature in the pyrolysis chamber rises, the fan blades in the trolley decompose to produce pyrolysis oil and pyrolysis gas. The bottom of the pyrolysis chamber is designed with an inclined structure, allowing the pyrolysis oil to naturally drain from the oil outlet pipe 20 into the pyrolysis oil storage tank 21. From there, it can enter the burner via the pyrolysis oil circuit 22 for re-combustion, thus providing heat energy for the system. The pyrolysis gas contains a large amount of organic components. After treatment by the organic exhaust gas treatment device, it is re-entered into the burner by the induced draft fan for re-combustion to generate heat for pyrolysis. Once the system stabilizes, the heat generated from the re-combustion of the pyrolysis oil and pyrolysis gas produced by the fan blade pyrolysis is sufficient to meet system needs, eliminating the need for natural gas and achieving system self-sufficiency in thermal energy, thus improving energy utilization. The continuous heating of the bottom of the pyrolysis chamber prevents the condensation of the pyrolysis oil.

[0068] Decarbonization process: After the pyrolysis process is completed, the resin in the wind turbine blades decomposes into pyrolysis oil and pyrolysis gas, leaving carbon powder in the fiber gaps and on the surface. Introducing reaction gas removes this carbon powder. During the decarbonization process, nitrogen is stopped being introduced between the automatic shut-off doors, and then oxygen is slowly introduced into the pyrolysis chamber until the space is filled. The concentration of reaction gas is highest at the bottom of the pyrolysis chamber, gradually diffusing upwards to ensure sufficient contact and reaction with the wind turbine blades.

[0069] In this embodiment, the reaction gas is oxygen. Multiple sets of reaction gas inlets are set at the lower end of the material carrier to make the reaction gas distribution more uniform and to make it more fully contacted with the fan blades in the material carrier, thus shortening the decarbonization reaction time. Since excessive oxygen will accelerate the oxidation of fibers, reduce fiber strength, and reduce the reuse rate, the amount of reaction gas entering the vehicle must be controlled.

[0070] After the above process is completed, the automatic doors before and after the pyrolysis section A2 are opened. The material car in the pyrolysis section A2 enters the cooling section A3 by pulling or pushing, and the automatic shut-off door between the pyrolysis section A2 and the cooling section A3 is closed. Then the material car in the filling section enters the pyrolysis section, and the automatic shut-off door between the filling section and the pyrolysis section is closed, and the pyrolysis process is carried out again.

[0071] In this embodiment, the fiber products in different loading vehicles can be tested for quality, and the products that meet the requirements can be recycled. Products that are not sufficiently pyrolyzed or decarbonized can be subjected to secondary pyrolysis or decarbonization reactions to ensure the quality of fiber products.

[0072] In this embodiment, the cooling section has multiple cooling air inlets 25 at its bottom and an exhaust gas outlet at its top. The exhaust gas outlet pipe is connected in sequence to the exhaust gas treatment device and the exhaust gas pipe 19 of the cooling section after the induced draft fan, which can be connected to the pyrolysis section as the air supply for the burner. The cooling section has a track support 9 at its bottom to support the track passing through it and to ensure that the track is at the same height as the track in the pyrolysis section. As an optional example, the track support of the cooling section can also adopt a structure combining expansion supports and fixed supports, with the specific structure being the same as described above and will not be detailed further.

[0073] In this embodiment, the cooling section adopts air-cooled cooling, with the cooling air in direct contact with the material, which can improve the cooling speed and achieve a significant cooling effect. After the material car enters the cooling zone, the cooling air is introduced through multiple cooling air inlets under the track. After the cooling air exchanges heat with the product in the material car, the exhaust gas of the cooling section is treated by the exhaust gas treatment device, and then enters the burner for reuse after passing through the induced draft fan.

[0074] In this embodiment, the material carrier has a frame structure with open ends along the track, facilitating the insertion of the blower blades. All contact surfaces between the material carrier and the blower blades are designed as screen structures, providing reliable channels for the entry of reactive gases and the discharge of pyrolysis oil. This solves problems such as uneven heating of the blower blades, insufficient contact between the reactive gases and the blower blades, difficulty in the outflow of pyrolysis oil, and structural damage due to blade stacking. This ensures a more complete reaction, guarantees the integrity of the fiber structure after decarbonization, and improves the quality of the recovered fibers.

[0075] A connecting structure is installed at the center of the external part of the material carrier, and every two material carriers are connected in series by the connecting structure, such as by bolts, for easy disassembly. Waste wind turbine blades are cut during transportation. The material carrier can be designed according to the blade size to be suitable for wind turbine blades of a certain length. That is, the material carrier can be designed to a suitable length to facilitate the direct loading of wind turbine blades and avoid further cutting of waste wind turbine blades. This avoids excessive cutting of wind turbine blades and can effectively solve the problem of severely broken waste wind turbine blades that make the fibers unusable.

[0076] The interior of the material carrier can be divided into multiple independent compartments. For example, the interior space of the material carrier can be divided into multiple layers, and each layer can be further divided into two independent spaces on the left and right. Fan blades of different sizes and positions can be classified and packaged separately, which can avoid problems such as uneven heating due to pyrolysis of fan blades, collapse and stacking of materials due to their own gravity, and low carbon removal efficiency due to difficulty in contact between reaction gas and materials. This can result in fiber products with complete volume and high quality.

[0077] Multiple material carriers are connected in series, and the intermittent dwell time of each carrier in each section can be set according to actual needs, ensuring complete pyrolysis of the wind turbine blades. For blades that are not fully pyrolyzed, they can be returned by material carriers for re-pyrolysis. At the same time, the pyrolysis and decarburization process of the wind turbine blades is in a static state, ensuring the integrity of the fiber structure.

[0078] Example 2

[0079] In one or more embodiments, a method for operating a pyrolysis reactor system for recovering fibers from waste wind turbine blades is disclosed, specifically including the following processes:

[0080] The cut wind turbine blades are placed on multiple loading vehicles in the filling section. After filling is completed, the loading vehicles are moved to the pyrolysis section and sealed. At the same time, the filling section begins filling the next batch of loading vehicles.

[0081] The wind turbine blades undergo pyrolysis and decarburization in the pyrolysis section. After pyrolysis and decarburization are completed, they are moved to the cooling section by a material carrier for cooling. At the same time, the next batch of material carriers that have been filled enters the pyrolysis section to achieve continuous operation.

[0082] The wind turbine blades undergo pyrolysis and decarburization in the pyrolysis section, specifically as follows:

[0083] After the material truck enters the pyrolysis section, the pyrolysis section is sealed.

[0084] Natural gas and air are introduced into the burner for combustion, providing corresponding heat to the combustion chambers of different temperature zones in the pyrolysis section;

[0085] During pyrolysis, the fan blades decompose upon heating to produce pyrolysis oil and pyrolysis gas. The pyrolysis oil is recovered to the pyrolysis oil storage tank and then enters the burner for further combustion; the pyrolysis gas is treated and then transported to the burner for further combustion.

[0086] After pyrolysis is completed, reaction gas is evenly introduced into the interior of the loading vehicle from bottom to top through the reaction gas inlet pipe to achieve the decarbonization process.

[0087] The specific implementation of the above process has been described in detail in Example 1, and will not be repeated here.

[0088] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A pyrolysis reactor system for recovering fibers from waste wind turbine blades, characterized in that, include: The loading section, pyrolysis section, and cooling section are arranged in sequence. Automatic shut-off doors are provided between the pyrolysis section and the loading section, and between the pyrolysis section and the cooling section, respectively, to achieve sealing of the pyrolysis section. The loading section, pyrolysis section and cooling section are each equipped with a track. The cut fan blades are loaded into the material carriers. Multiple material carriers carrying fan blades are connected in series and can move along the track between the loading section, pyrolysis section and cooling section. The pyrolysis section is an independent reactor that can complete both pyrolysis and decarbonization processes. The pyrolysis section includes: a reactor furnace body arranged along the track direction, and a pyrolysis chamber arranged in the reactor furnace body along the track direction; the pyrolysis chamber is fixed in the reactor furnace body by a pyrolysis chamber support; the track is arranged through the pyrolysis chamber, and multiple burners are provided at the bottom of the pyrolysis chamber, and the burners are respectively connected to the natural gas inlet pipeline and the air inlet pipeline; Based on the different pyrolysis temperatures of different wind turbine blades, the pyrolysis chamber is divided into multiple temperature zones along the track direction, and each temperature zone has a different pyrolysis temperature. Temperature detectors are installed in each temperature zone to collect the temperature of the pyrolysis chamber in each zone and feed the temperature back to the proportional controller, which in turn controls the opening of the automatic valves in the natural gas intake pipeline and the air intake pipeline to control the combustion temperature of the burners in different temperature zones. The bottom of the pyrolysis chamber is inclined, and the lower end of the bottom is connected to the pyrolysis oil storage tank through the pyrolysis oil outlet pipeline; the pyrolysis oil storage tank is connected to the burner through the pyrolysis oil circuit; the pyrolysis gas outlet pipeline at the top of the pyrolysis chamber is connected to the burner through the exhaust gas treatment device and then through the induced draft fan. The pyrolysis oil produced during the pyrolysis process flows out through the pyrolysis oil outlet pipeline and is temporarily stored in the pyrolysis oil storage tank; part of the pyrolysis oil enters the burner for re-combustion through the pyrolysis oil circuit. The pyrolysis gas produced during the pyrolysis process is treated as exhaust gas and then re-enters the burner for re-combustion via an induced draft fan. The loading cart is designed to a suitable length to facilitate direct loading of the blower blades, avoiding further cutting of the waste blower blades. The loading cart has multiple independent compartments, dividing the interior space into multiple layers. Each layer is further divided into two independent spaces on the left and right. Each compartment contains the cut blower blades. All contact surfaces between the loading cart and the blower blades are designed with a screen structure to facilitate the entry of reaction gas and the discharge of pyrolysis oil. Multiple sets of reactive gas inlets are located in the bottom space of the material carrier. The reactive gas is introduced into the reactive gas inlets through the reactive gas inlet pipe so that the reactive gas can fully and evenly contact the fan blades in the material carrier.

2. The waste wind turbine blade pyrolysis and fiber recovery reactor system as described in claim 1, characterized in that, After the material loading section is filled, the material carrier moves to the pyrolysis section for pyrolysis and decarbonization. At the same time, the loading section loads the next batch of material carriers. After the fan blades are pyrolyzed and decarbonized in the pyrolysis section, they are moved by the material carrier to the cooling section for cooling. At the same time, the next batch of material carriers that have been filled enters the pyrolysis section to achieve continuous operation.

3. The waste wind turbine blade pyrolysis and fiber recovery reactor system as described in claim 1, characterized in that, Two automatic shut-off doors are installed between the pyrolysis section and the filling section. One automatic shut-off door is used to close one end of the pyrolysis section, and the other automatic shut-off door is used to close the filling section. After the two automatic shut-off doors are closed, nitrogen gas is filled between the two automatic shut-off doors to seal them. Two automatic shut-off doors are installed between the pyrolysis section and the cooling section. One automatic shut-off door is used to close the other end of the pyrolysis section, and the other automatic shut-off door is used to close the cooling section. After the two automatic shut-off doors are closed, nitrogen gas is filled between the two automatic shut-off doors to seal them.

4. The waste wind turbine blade pyrolysis and fiber recovery reactor system as described in claim 3, characterized in that, Each automatic shut-off door has a sealing structure on the side wall that contacts the corresponding work section.

5. A method for operating a waste wind turbine blade pyrolysis and fiber recovery reactor system, applicable to the waste wind turbine blade pyrolysis and fiber recovery reactor system as described in any one of claims 1-4, characterized in that, include: The cut wind turbine blades are placed on multiple loading vehicles in the filling section. After filling is completed, the loading vehicles are moved to the pyrolysis section and sealed. At the same time, the filling section begins filling the next batch of loading vehicles. The wind turbine blades undergo pyrolysis and decarburization in the pyrolysis section. After pyrolysis and decarburization are completed, they are moved to the cooling section by a material carrier for cooling. At the same time, the next batch of material carriers that have been filled enters the pyrolysis section to achieve continuous operation.

6. The working method of the waste wind turbine blade pyrolysis and fiber recovery reactor system as described in claim 5, characterized in that, The wind turbine blades undergo pyrolysis and decarburization in the pyrolysis section, specifically as follows: After the material truck enters the pyrolysis section, the pyrolysis section is sealed. Natural gas and air are introduced into the burner for combustion, providing corresponding heat to the combustion chambers of different temperature zones in the pyrolysis section; During pyrolysis, the fan blades decompose upon heating to produce pyrolysis oil and pyrolysis gas. The pyrolysis oil is recovered to the pyrolysis oil storage tank and then enters the burner for further combustion; the pyrolysis gas is treated and then transported to the burner for further combustion. After pyrolysis is completed, reaction gas is evenly introduced into the interior of the loading vehicle through the reaction gas inlet pipe to achieve the decarbonization process.

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