Method and integrated system for thermochemical staged treatment of abandoned wind driven generator blades

Abstract

The invention belongs to the technical field of grading treatment of wind driven generator blades, and particularly relates to a method and an integrated system for thermochemical grading treatment of waste wind driven generator blades. The integrated system comprises a spiral feeder, a gasification reactor bubbling fluidized bed gasification area, a gasification reactor lifting pipe reforming area, a cyclone separator, a heat exchanger, a bag-type dust collector, a matched gas conveying pipeline, a matched solid conveying pipeline and the like which are connected in sequence. The gasification reaction of the abandoned wind driven generator blade is decoupled into the gasification reaction and the reforming reaction, the solid product generates glass fiber powder, and the gas product realizes clean conversion of high-volatile organic matters into synthesis gas / fuel gas by enhancing the thermal cracking / oxidative cracking effect of organic macromolecules. And finally, stage treatment and resource utilization of the abandoned wind driven generator blades are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hierarchical processing of wind turbine blades, and particularly relates to a method and integrated system for thermo-chemical hierarchical processing of discarded wind turbine blades. BACKGROUND

[0002] The design service life of wind turbine blades is generally about 25 years, and wind turbine blades that are about to be retired or have already been retired need to be properly disposed of. Wind turbine blades mainly contain glass fibers and resin organic compounds, which are difficult to dissolve and degrade. At present, the main treatment method for discarded wind turbine blades is material landfill, but this method is suitable for smaller blades, and the plastic and glass fiber have very low degradability, so landfill is not a long-term solution. In recent years, discarded wind turbine blades have been used as fuel to burn organic matter to provide heat, and the remaining glass fiber powder can be used as a filler for concrete to improve the performance of concrete. However, the combustion process releases a large amount of toxic and harmful tail gas, limiting the amount of material that can be treated by combustion.

[0003] In view of the stable properties and good mechanical strength of wind turbine blades, recycling wind turbine blades into new products can achieve resource utilization of waste. For example, Chinese patent application CN202411012288.4 discloses a recycling process for wind turbine blades, which uses mechanical tools to cut the blades to a suitable size, and then uses a molding machine and a mold to press and bond the blade material into stools, elevator hoppers, garbage cans, and transfer trays for life and industrial products, thereby creating higher economic benefits. For another example, Chinese patent application CN202211266354.1 proposes a method for recycling retired wind turbine blades, which grinds the retired wind turbine blade material after crushing, and then mixes it with a flame retardant, a fluxing agent, a curing agent, an antioxidant, a lubricant, a ceramic filler, and a polymer to form a polymer-based ceramic composite material and a flame-retardant material. However, this recycling method has limited capacity, and the products still face the problem of secondary waste.

[0004] In addition, some research works use chemical methods to treat wind turbine blade, and obtain resin materials and glass fiber filaments and other products, realizing high-value utilization of waste resources. For example, Chinese invention patent application CN202510381048.X discloses a waste wind turbine blade recycling system, which uses soaking liquid to treat blade blocks, then grinds and crushes to obtain fiber filaments and resin particles. The combination of chemical treatment and mechanical treatment realizes efficient recovery of fiber filaments in waste wind turbine blades. Chinese invention patent application CN202211244276.5 proposes a method for resource disposal of waste wind turbine blades, which uses a hydrothermal liquefaction reactor to treat the wind turbine blades under high temperature and high pressure conditions, and controls the temperature to obtain gas, liquid and solid phase products, achieving the effect of harmless treatment and resource utilization. However, this method has small processing capacity, and additional chemicals are needed during the treatment process, which is high in processing cost. In recent years, researchers have tried to use thermochemical methods to treat waste blades. For example, Chinese invention patent CN202211289726.2 discloses a wind turbine waste blade recycling system and method, which pyrolyzes and carbonizes the wind turbine waste blades in an oxygen-containing atmosphere to obtain pyrolysis carbon-coated reinforcing fibers, pyrolysis tar and pyrolysis tail gas. The recycling method effectively reduces the energy consumption of related technologies, and the recovered fiber has high quality and is low-carbon and environmentally friendly. However, the quality of the pyrolysis products at all levels is poor, and secondary treatment is still needed to meet the requirements of subsequent use. Therefore, it is urgent to find a large-scale, harmless, resourceful and high-value treatment of waste wind turbine blades, to fill the gap in the recycling of wind turbine blades, and to help the sustainable development of the wind power industry. SUMMARY

[0005] The present application aims to solve the problems of recycling of waste wind turbine blades and other short boards, and uses a bubbling bed reactor and a riser reactor to decouple the gasification reaction of waste wind turbine blades into gasification reaction and reforming reaction, to generate glass fiber powder from solid products, and to realize clean conversion of high-volatile organic matter into synthesis gas / gas through the action of enhanced thermal cracking / oxidative cracking of organic macromolecules, and finally to realize the graded treatment and resource utilization of waste wind turbine blades.

[0006] To this end, the first aspect of the present application provides an integrated system for thermochemical graded treatment of waste wind turbine blades, comprising: a spiral feeder, a gasification reactor bubbling fluidized bed gasification zone, a gasification reactor riser reforming zone, a cyclone separator, a heat exchanger, a bag filter, a matched gas conveying pipeline and a solid conveying pipeline connected in sequence; and a raw material supply port connected to the spiral feeder; a segmented oxygen supply reactor connected to the gasification reactor riser reforming zone; a carbon dioxide and water vapor inlet, arranged at the upper part of the heat exchanger; a syngas / gas outlet, arranged at the upper part of the bag filter; a second solid material outlet, connected with the lower part of the gasification zone of the bubbling fluidized bed of the gasification reactor; an oxygen inlet, connected with the bottom of the gasification zone of the bubbling fluidized bed of the gasification reactor and the lower part of the heat exchanger, respectively; a first solid material outlet, connected with the bottom of the cyclone separator and the bottom of the bag filter, respectively.

[0007] The gasification zone of the bubbling fluidized bed of the gasification reactor can realize the rapid conversion of the waste wind turbine blade into gasification gas and glass fiber solid; the riser reforming zone of the gasification reactor can realize the thermal cracking and oxidative cracking of tar macromolecules in the gasification product gas to produce low-tar syngas / gas. The two zones decouple the gasification reaction of the waste wind turbine blade into gasification reaction and reforming reaction, and the solid product generates glass fiber powder, and the gas product realizes the clean conversion of high-volatile organic matter into syngas / gas through the strengthening of the thermal cracking / oxidative cracking of organic macromolecules, and finally realizes the staged treatment and resource utilization of the waste wind turbine blade.

[0008] As a preferred scheme, the top of the riser reforming zone of the gasification reactor is connected with the upper part of the cyclone separator, and the top of the cyclone separator is connected with the tube side of the heat exchanger.

[0009] As a preferred scheme, the integrated system for the thermal chemical staged treatment of the waste wind turbine blade adopts a pressurized reactor as the gasification reactor; and optionally, the operating pressure is 0.2-0.5 MPa, and the screw feeder is a pressurized feeder.

[0010] The second aspect of the present application provides a method for the thermal chemical staged treatment of a waste wind turbine blade, which adopts the integrated system for the thermal chemical staged treatment of a waste wind turbine blade according to the present application, and the method comprises the following steps: The waste wind turbine blade is crushed to an appropriate size, the raw material is added into the raw material bin from the raw material supply port, and then enters the gasification zone of the bubbling fluidized bed of the gasification reactor through the screw feeder, where the gasification reaction occurs to generate solid and gaseous products; the solid product circulates in the bubbling fluidized bed to generate gasification and combustion reactions, and then is discharged from the system through the second solid material outlet at the bottom to obtain a glass fiber powder product; The gas product contains a large amount of gasification gas and macromolecular organic matter, which enters the internal reforming zone of the riser of the gasification reactor from the top of the bubbling fluidized bed gasification zone of the gasification reactor, and oxygen enters the internal reforming zone of the riser of the gasification reactor through the staged oxygen supply reactor, and after being in contact with the gas product, a combustion reaction occurs to form a high-temperature reaction zone, which promotes the deep cracking of macromolecular organic matter into small-molecule gaseous compounds; The gasification product enters the cyclone separator from the top of the internal reforming zone of the riser of the gasification reactor, and the synthesis gas / gas passes through the tube side of the heat exchanger, the bag filter, and the synthesis gas / gas outlet to leave the system, thereby obtaining the synthesis gas / gas product. The fine powder solid material from the cyclone separator, the heat exchanger, and the bag filter leaves the system through the first solid material outlet.

[0011] The above-mentioned method for thermally and chemically grading the waste wind turbine blade is based on the characteristics of high heat transfer and high mass transfer of the circulating fluidized bed, and the waste wind turbine blade is gasified in the bubbling fluidized bed to release the glass fibers from the organic wrapping, and the organic matter is removed by combustion to obtain glass fiber powder. At the same time, the oxidation and high-temperature reforming method is used to completely decompose the large amount of macromolecular organic matter contained in the gasification product gas, thereby reducing the tar content in the gasification product gas and realizing the graded resource utilization of the waste wind turbine blade.

[0012] As a preferred solution, the waste wind turbine blade is crushed into fragments with a particle size of 0.5-5mm to ensure uniform heating and gasification in the gasification zone of the bubbling fluidized bed of the gasification reactor.

[0013] As a preferred solution, the waste wind turbine blade is dried before crushing to remove surface moisture and improve the efficiency of the gasification reaction.

[0014] As a preferred solution, the above-mentioned method for thermally and chemically grading the waste wind turbine blade, the temperature of the gasification reaction in the gasification zone of the bubbling fluidized bed of the gasification reactor is 750-950℃, which can effectively promote the gasification of organic matter in the waste wind turbine blade, while avoiding the melting or clogging of glass fibers caused by excessively high temperature. Further preferably, the temperature is 850-900℃, at which the efficiency of the gasification reaction is the highest, and the organic matter can be fully gasified while ensuring the integrity and quality of the glass fibers. Specifically, when the temperature is controlled at 850-900℃, the gasification reaction can more effectively convert the organic matter into gasification gas, while reducing the generation of tar and improving the quality of the synthesis gas / gas.

[0015] As a preferred solution, the temperature of the combustion reaction in the riser reforming zone of the gasification reactor in the method for the thermal chemical staged treatment of waste wind turbine blades is 900-1300°C. This temperature range can effectively promote the deep cracking of macromolecular organic matter in the gas product, and at the same time avoid damage to the equipment material caused by excessively high temperature. Further preferably, the temperature is 1000-1200°C. In this temperature range, the efficiency of the combustion reaction is the highest, and the deep cracking of macromolecular organic matter can be achieved to generate low-tar syngas / gas. Specifically, when the temperature is controlled to be 1000-1200°C, the combustion reaction can more effectively convert macromolecular organic matter into small-molecule gas compounds, while reducing the generation of tar and improving the quality of syngas / gas.

[0016] As a preferred solution, the gasification agent for the gasification reaction in the bubbling fluidized bed gasification zone of the gasification reactor in the method for the thermal chemical staged treatment of waste wind turbine blades is one of air, air+steam, air+oxygen, air+oxygen+steam, oxygen+steam, and oxygen+steam+carbon dioxide. The selection of these gasification agents can be adjusted according to different processing requirements and target products to achieve the best gasification effect.

[0017] According to the present application, in a specific embodiment, carbon dioxide+steam+oxygen is used as the gasification agent in the gasification process of the waste wind turbine blade, and during the gasification process, carbon dioxide and steam enter the shell side of the heat exchanger from the carbon dioxide and steam inlet, and then are fully mixed with oxygen supplied from the oxygen inlet, and then enter the system from the bottom of the bubbling fluidized bed gasification zone of the gasification reactor, thereby providing the gasification agent and fluidization gas for the gasification reaction.

[0018] The excess air coefficient for the gasification reaction in the bubbling fluidized bed gasification zone of the gasification reactor in the method for the thermal chemical staged treatment of waste wind turbine blades is 0.1-0.4. The control of the excess air coefficient has an important influence on the efficiency of the gasification reaction and the quality of the product. A proper excess air coefficient can ensure that the gasification reaction is fully carried out, while avoiding excessive air leading to heat loss and a decrease in the quality of the product. More preferably, the excess air coefficient is 0.25-0.35. In this range, the gasification reaction can be carried out while minimizing heat loss and tar generation. Specifically, when the excess air coefficient is controlled to be 0.25-0.35, the gasification reaction can achieve efficient organic matter gasification while maintaining a low tar content and a high carbon conversion rate.

[0019] The tar content of the syngas / gas product in the method for the thermal chemical staged treatment of waste wind turbine blades is 150 mg / Nm 3 Hereinafter, the carbon conversion rate is 90% or more.

[0020] The advantages and effects of the present application are as follows: 1. The present application provides a method and integrated system for thermal-chemical staged treatment of waste wind turbine blades, which decouples the waste wind turbine blade gasification reaction into gasification reaction and reforming reaction, and realizes thermal-chemical staged utilization of waste wind turbine blades to produce gasification gas / fuel gas and glass fiber powder.

[0021] 2. The solid and gas products are treated at high temperature, the solid bed temperature is controlled to prevent glass fiber from melting and slagging at high temperature, and the gas reaction zone temperature is controlled to make the macromolecular organic matter decompose deeply.

[0022] 3. The method of thermal-chemical staged treatment strengthens the thermal cracking and oxidative cracking of organic macromolecules in the gasification gas, and realizes clean conversion of high-volatile organic matter into synthesis gas / fuel gas.

[0023] 4. The glass fiber powder after thermal-chemical treatment of waste wind turbine blades can be used as raw material for producing glass fiber or filler for strengthening the performance of cement.

[0024] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, which can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 An integrated system for thermal-chemical staged treatment of waste wind turbine blades.

[0026] Figure 2 A simple schematic diagram of a method for thermal-chemical staged treatment of waste wind turbine blades.

[0027] Wherein, 1 - raw material supply port, 2 - screw feeder, 3 - gasification reactor bubbling fluidized bed gasification zone, 4 - gasification reactor riser reforming zone, 5 - staged oxygen supply reactor, 6 - cyclone separator, 7 - heat exchanger, 8 - bag dust collector, 9 - carbon dioxide and water vapor inlet, 10 - synthesis gas / fuel gas outlet, 11 - first solid material outlet, 12 - second solid material outlet, 13 - oxygen inlet. DETAILED DESCRIPTION

[0028] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the technical solutions provided by the present application. However, it is obvious to those skilled in the art that the technical solutions provided by the present application can be implemented without one or more of these details.

[0029] In the description of this invention, it should be understood that the terms "upper part," "middle part," "bottom part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In this embodiment of the invention, the waste wind turbine blades are derived from retired wind turbine blades from Zhangjiakou, Hebei Province. The main components are fiberglass and organic matter. Industrial analysis results show that the mass percentage of each component in the raw materials is as follows: volatile matter content 26%, ash content 71% (mainly glass fiber), moisture content 1%, and fixed carbon content 2%.

[0031] In this embodiment of the invention, see Figure 1 , Figure 2 An integrated system for thermochemically graded treatment of waste wind turbine blades includes: The system consists of, in sequence: a screw feeder 2, a gasification reactor bubbling fluidized bed gasification zone 3, a gasification reactor riser reforming zone 4, a cyclone separator 6, a heat exchanger 7, a bag filter 8, and matching gas and solid conveying pipelines; as well as: a raw material supply port 1 connected to the screw feeder 2; a segmented oxygen supply reactor 5 connected to the gasification reactor riser reforming zone 4; a carbon dioxide and water vapor inlet 9 located at the top of the heat exchanger 7; a syngas / fuel gas outlet 10 located at the top of the bag filter 8; a second solid material outlet 12 connected to the bottom of the gasification reactor bubbling fluidized bed gasification zone 3; an oxygen inlet 13 connected to the bottom of the gasification reactor bubbling fluidized bed gasification zone 3 and the bottom of the heat exchanger 7; and a first solid material outlet 11 connected to the bottom of the cyclone separator 6 and the bottom of the bag filter 8. The top of the reforming zone 4 of the gasification reactor riser is connected to the upper part of the cyclone separator 6; the top of the cyclone separator 6 is connected to the tube side of the heat exchanger 7.

[0032] A method for thermochemically classifying waste wind turbine blades includes: The waste wind turbine blade is crushed into a proper size, the raw material is added into the raw material bin from the raw material supply port 1, enters the gasification reactor bubbling fluidized bed gasification area 3 through the screw feeder 2, the gasification reaction occurs in the area to generate solid products and gas products, the solid products circulate in the bubbling fluidized bed to generate gasification and combustion reactions, then are discharged from the system through the second solid material outlet 12 at the bottom to obtain the product 2 (glass fiber powder); the gas products containing a large amount of gasification gas and macromolecular organic matter enter the gasification reactor riser reforming area 4 from the top of the gasification reactor bubbling fluidized bed gasification area 3, the oxygen enters the gasification reactor riser reforming area 4 through the staged oxygen supply reactor 5, and after being contacted with the gas products, combustion reaction occurs to form a high-temperature reaction area, so that the macromolecular organic matter is deeply cracked into small-molecule gaseous compounds; the gasification products enter the cyclone separator 6 from the top of the gasification reactor riser reforming area 4, the synthesis gas / gas is discharged from the system through the heat exchanger 7 pipe, the bag filter 8 and the synthesis gas / gas outlet 10 from the top of the cyclone separator 6 to obtain the product 1 (synthesis gas / gas); the fine powder solid material from the cyclone separator 6, the heat exchanger 7 and the bag filter 8 is discharged from the system through the first solid material outlet 11.

[0033] In the embodiment of the application, the percentage content of each component in the gasification agent is a volume percentage content.

[0034] Embodiment 1: According to the method and integrated system for thermally chemically grading processing of waste wind turbine blades provided by the application, the waste wind turbine blades are crushed into fragments with a particle size of 2-5 mm, the gasification temperature is controlled at 850-900 o C, the high-temperature reforming area temperature is controlled at 1100-1200 o C by controlling the decomposition oxygen supply amount, 20% water vapor+80% air is used as the gasification agent, and the excess air coefficient is controlled at 0.3-0.35. The waste wind turbine blade fragments form a solid material bed layer in the bubbling area, the fragments at the bottom of the bed layer contact the gasification agent to generate combustion and gasification reactions, the glass fiber powder is discharged from the system from the bottom of the bubbling bed, the gas products enter the high-temperature reforming reaction area to generate thermal cracking and oxidative cracking, and low-tar gas is generated. The tar content in the gas can be reduced to 100 mg / Nm 3 The carbon conversion rate is above 90%.

[0035] Embodiment 2: The method and integrated system for thermally chemically grading processing of waste wind turbine blades according to the present application are similar to Embodiment 1. In this embodiment, the waste wind turbine blades are broken into fragments with a particle size of 0.5-5 mm, the gasification temperature is controlled at 850-900℃, the high-temperature reforming zone temperature is controlled at 1000-1200℃ by controlling the amount of oxygen supplied for decomposition, 30% oxygen + 20% steam + 50% carbon dioxide is used as the gasification agent, and the excess air coefficient is controlled at 0.3-0.35. The waste wind turbine blade fragments form a solid material bed in the bubbling zone, the fragments at the bottom of the bed contact the gasification agent to cause combustion and gasification reactions, the glass fiber powder is removed from the bottom of the bubbling bed, the gaseous products enter the high-temperature reforming reaction zone to cause thermal cracking and oxidative cracking, and low-tar syngas is generated. The tar content in the syngas can be reduced to 50 mg / Nm 3 The carbon conversion rate is above 95%.

[0036] Embodiment 3 The method and integrated system for thermally chemically grading processing of waste wind turbine blades according to the present application are similar to Embodiment 1. In this embodiment, the waste wind turbine blades are broken into fragments with a particle size of 1-5 mm, the gasification temperature is controlled at 850-900℃, the high-temperature reforming zone temperature is controlled at 1100-1200℃ by controlling the amount of oxygen supplied for decomposition, the operating pressure is controlled at 0.3 MPa, 20% steam + 80% air is used as the gasification agent, and the excess air coefficient is controlled at 0.3-0.35. The waste wind turbine blade fragments form a solid material bed in the bubbling zone, the fragments at the bottom of the bed contact the gasification agent to cause combustion and gasification reactions, the glass fiber powder is removed from the bottom of the bubbling bed, the gaseous products enter the high-temperature reforming reaction zone to cause thermal cracking and oxidative cracking, and low-tar syngas is generated. The tar content in the syngas can be reduced to 50 mg / Nm 3 The carbon conversion rate is above 95%.

[0037] Embodiment 4 According to the thermal chemical grading treatment method and integrated system for waste wind turbine blades provided by the present application, similar to Embodiment 3, the waste wind turbine blades are crushed into fragments with a particle size of 1-5 mm, the gasification temperature is controlled at 850-900℃, the high-temperature reforming zone temperature is controlled at 1100-1200℃ by controlling the decomposition oxygen supply amount, the operating pressure is controlled at 0.3 MPa, 15% water vapor+35% oxygen+50% carbon dioxide is used as the gasification agent, and the excess air coefficient is controlled at 0.3-0.35. The waste wind turbine blade fragments form a solid material bed layer in the bubbling zone, the fragments and the gasification agent contact each other at the bottom of the bed layer to generate a combustion reaction and a gasification reaction, the glass fiber powder is discharged from the bottom of the bubbling bed, and the gaseous products enter the high-temperature reforming reaction zone to generate thermal cracking and oxidative cracking, thereby generating low-tar syngas. The tar content can be reduced to 150 mg / Nm 3 The carbon conversion rate is above 95%.

[0038] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated system for thermochemically graded treatment of waste wind turbine blades, characterized in that, The integrated system includes: The following components are connected in sequence: a screw feeder (2), a gasification reactor bubbling fluidized bed gasification zone (3), a gasification reactor riser reforming zone (4), a cyclone separator (6), a heat exchanger (7), a bag filter (8), and matching gas and solid conveying pipelines; and: The raw material supply port (1) is connected to the screw feeder (2); The segmented oxygen supply reactor (5) is connected to the reforming zone (4) of the gasification reactor riser; The carbon dioxide and water vapor inlet (9) is located at the top of the heat exchanger (7); Syngas / gas outlet (10) is located at the top of bag filter (8); The second solid material outlet (12) is connected to the lower part of the bubbling fluidized bed gasification zone (3) of the gasification reactor; The oxygen inlet (13) is connected to the bottom of the bubbling fluidized bed gasification zone (3) of the gasification reactor and the lower part of the heat exchanger (7), respectively. The first solid material outlet (11) is connected to the bottom of the cyclone separator (6) and the bottom of the bag filter (8), respectively.

2. The integrated system for thermochemically graded treatment of waste wind turbine blades according to claim 1, characterized in that, The top of the reforming zone (4) of the gasification reactor riser is connected to the upper part of the cyclone separator (6); The top of the cyclone separator (6) is connected to the tube side of the heat exchanger (7).

3. The integrated system for thermochemically graded treatment of waste wind turbine blades according to claim 1, characterized in that, The gasification reactor used is a pressurized reactor; optionally, it meets the following requirement: operating pressure is 0.2-0.5 MPa; The screw feeder (2) is a pressurized feeder.

4. A method for thermochemically graded treatment of waste wind turbine blades, characterized in that, The method employs the integrated system for thermochemical grading of waste wind turbine blades as described in any one of claims 1-3, and the method includes: Waste wind turbine blades are crushed to an appropriate size and added to the raw material silo from the raw material supply port (1). They enter the gasification zone (3) of the gasification reactor bubbling fluidized bed through the screw feeder (2). Here, a gasification reaction occurs to generate solid products and gaseous products. The solid products circulate in the bubbling fluidized bed to undergo gasification and combustion reactions. Then, they are discharged from the system through the second solid material outlet (12) at the bottom to obtain glass fiber powder products. The gaseous products contain a large amount of gasified gas and macromolecular organic matter. They enter the reforming zone (4) of the gasification reactor riser from the top of the gasification zone (3) of the bubbling fluidized bed gasification zone of the gasification reactor. Oxygen enters the reforming zone (4) of the gasification reactor riser through the segmented oxygen supply reactor (5). After contacting the gaseous products, a combustion reaction occurs to form a high-temperature reaction zone, which promotes the deep decomposition of macromolecular organic matter into small molecule gaseous compounds. The gasification products enter the cyclone separator (6) from the top of the reforming zone (4) of the gasification reactor riser. The syngas / gas product leaves the system from the top of the cyclone separator (6), through the tube side of the heat exchanger (7), the bag filter (8), and the syngas / gas outlet (10), thus obtaining the syngas / gas product. Fine powder solid material from the cyclone separator (6), heat exchanger (7), and bag filter (8) leaves the system through the first solid material outlet (11).

5. The method for thermochemically graded treatment of waste wind turbine blades according to claim 4, characterized in that, The temperature of the gasification reaction in the bubbling fluidized bed gasification zone (3) of the gasification reactor is 750-950℃; The combustion reaction temperature in the reforming zone (4) of the gasification reactor riser is 900-1300℃.

6. The method for thermochemically graded treatment of waste wind turbine blades according to claim 5, characterized in that, The temperature of the gasification reaction in the bubbling fluidized bed gasification zone (3) of the gasification reactor is 850-900℃; The combustion reaction temperature in the reforming zone (4) of the gasification reactor riser is 1000-1200℃.

7. The method for thermochemically graded treatment of waste wind turbine blades according to claim 4, characterized in that, The gasification agent in the bubbling fluidized bed gasification zone of the gasification reactor (3) is one of the following: air, air + water vapor, air + oxygen, air + oxygen + water vapor, oxygen + water vapor, oxygen + water vapor + carbon dioxide.

8. The method for thermochemically graded treatment of waste wind turbine blades according to claim 4, characterized in that, The excess air coefficient of the gasification reaction in the bubbling fluidized bed gasification zone (3) of the gasification reactor is 0.1-0.

4.

9. The method for thermochemically graded treatment of waste wind turbine blades according to claim 8, characterized in that, The excess air coefficient of the gasification reaction in the bubbling fluidized bed gasification zone (3) of the gasification reactor is 0.25-0.

35.

10. The method for thermochemically graded treatment of waste wind turbine blades according to claim 4, characterized in that, The tar content of the syngas / gas product is 150 mg / Nm³. 3 The carbon conversion rate is above 90%.

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