Fan blade resource recycling system and method

Abstract

The invention provides a fan blade resource recycling system and method, and the fan blade resource recycling system comprises electrolysis equipment which is used for preparing hydrogen and oxygen through electrolysis. And the sorting equipment is used for sorting the retired fan blades to obtain epoxy resin and glass fibers. And the gasification equipment is connected with the electrolysis equipment and the separation equipment and is used for carrying out gasification reaction on the epoxy resin by taking the oxygen prepared by the electrolysis equipment as a gasification agent to decompose the epoxy resin into synthesis gas and purifying the synthesis gas to produce hydrogen. And the flash Joule heating equipment is connected with the separation equipment and is used for preparing the silicon carbide material from the glass fibers and the conductive carbon black. Through cooperation of the electrolysis equipment, the separation equipment, the gasification equipment and the flash Joule heating equipment, efficient separation of epoxy resin and glass fibers, epoxy resin gasification and synthesis of silicon carbide from the glass fibers through a flash Joule method are achieved, high-value utilization of all components of the fan blade is achieved, and the industrial solid waste treatment problem is solved.

Description

Technical Field

[0001] This application relates to the technical field of resource recovery of wind turbine blades, and particularly to a resource recovery system and method for wind turbine blades. Background Art

[0002] Against the backdrop of the global wind power installed capacity exceeding 900GW, thermosetting composite wind turbine blades have become a solid waste treatment challenge due to their non-meltable characteristics. Traditional treatment methods face a double contradiction of environmental risks and economic costs: open-air incineration releases toxic substances such as phenol and hydrocyanic acid, landfill causes groundwater pollution by glass fibers, and the disassembly and transportation costs are expensive. Summary of the Invention

[0003] This application provides a resource recovery system and method for wind turbine blades to solve at least some of the problems in the related art.

[0004] In a first aspect, an embodiment of this application provides a resource recovery system for wind turbine blades, including:

[0005] An electrolysis device for electrolytically preparing hydrogen and oxygen;

[0006] A sorting device for sorting retired wind turbine blades to obtain epoxy resin and glass fiber;

[0007] A gasification device connected to the electrolysis device and the sorting device, for using the oxygen prepared by the electrolysis device as a gasifying agent to decompose the epoxy resin by gasification reaction into syngas and purify it to produce hydrogen;

[0008] A flash Joule heating device connected to the sorting device, for preparing silicon carbide material from the glass fiber and conductive carbon black.

[0009] Optionally, the electrolysis device includes a water inlet pipeline, an energized electrode, a gas transmission pipeline, and a gas storage unit. The water inlet pipeline is used to connect to electrolyzed water, the energized electrode is used to connect to a renewable energy network, the gas transmission pipeline is connected to the gasification device and used to output the electrolytically generated oxygen, and the gas storage unit is used to store the electrolytically generated hydrogen.

[0010] Optionally, the sorting device includes:

[0011] A crusher for crushing retired wind turbine blades to obtain blade fragments;

[0012] A pulverizer connected to the crusher, for pulverizing the blade fragments to obtain blade powder;

[0013] A multi-stage vibrating air classifier for air sorting the blade powder to separate the epoxy resin and the glass fiber.

[0014] Optionally, the gasification device includes a fluidized bed gasifier, a multi-stage gas conversion tower, and a pressure swing adsorption separator. The fluidized bed gasifier is connected to the electrolysis device. The volume ratio of H2 to CO in the syngas of the gas conversion tower is 2:1 - 5:1. The pressure swing adsorption separator includes a molecular sieve adsorption bed with a diameter of 5 mm - 10 mm, and the desorption pressure is ≤50 kPa.

[0015] Optionally, the flash Joule heating device mixes the glass fiber and conductive carbon black in a mass ratio of 2:1 - 5:1, and synthesizes a silicon carbide material at a temperature of 2000°C - 2500°C.

[0016] In a second aspect, an embodiment of the present application provides a method for resource recovery of wind turbine blades, including:

[0017] Hydrogen and oxygen are prepared by electrolysis;

[0018] Retired wind turbine blades are sorted to obtain epoxy resin and glass fiber;

[0019] The oxygen prepared by electrolysis is used as a gasifying agent, and the epoxy resin is subjected to a gasification reaction to be decomposed into syngas and purified to produce hydrogen;

[0020] The glass fiber and conductive carbon black are prepared into a silicon carbide material by using the flash Joule heating method.

[0021] Optionally, the sorting of the retired wind turbine blades to obtain epoxy resin and glass fiber includes:

[0022] The retired wind turbine blades are crushed to obtain blade fragments;

[0023] The blade fragments are ground into powder to obtain blade powder;

[0024] The blade powder is separated by air classification to obtain the epoxy resin and the glass fiber.

[0025] Optionally, the use of the oxygen prepared by electrolysis as a gasifying agent to decompose the epoxy resin into syngas and purify to produce hydrogen includes:

[0026] The epoxy resin is gasified under predetermined temperature, pressure, and gasifying agent conditions to generate syngas containing components of H2, CO, and CO2;

[0027] Through a chemical conversion process, the hydrogen content in the syngas is increased and the gas components are adjusted;

[0028] By using a pressure swing adsorption separation process, high-purity hydrogen is separated from the syngas to obtain a hydrogen product.

[0029] Optionally, the volume ratio of H2 to CO in the syngas is 2:1 - 5:1.

[0030] Optionally, the method for preparing silicon carbide material from the glass fiber and conductive carbon black by flash Joule heating method includes: mixing the glass fiber and conductive carbon black according to a mass ratio of 2:1 - 5:1, and synthesizing the silicon carbide material at a temperature of 2000°C - 2500°C by flash Joule heating method.

[0031] The fan blade resource recovery system provided by this application realizes the efficient separation of epoxy resin and glass fiber, the gasification of epoxy resin, and the synthesis of silicon carbide from glass fiber by flash Joule heating method through the collaborative cooperation of electrolysis equipment, sorting equipment, gasification equipment, and flash Joule heating equipment, realizing the high-value utilization of all components of the fan blade and solving the problem of solid waste treatment in the industry.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0033] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0034] Figure 1 Shown is a flowchart of a fan blade resource recovery method according to an exemplary embodiment of this application;

[0035] Figure 2 Shown is a structural block diagram of a fan blade resource recovery system according to another exemplary embodiment of this application;

[0036] Figure 3 Shown is a working flowchart of a domestic waste resource recovery system according to an exemplary embodiment of this application. Detailed Description of Specific Embodiments

[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are only examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0038] In the related technical routes, the physical method has problems of deteriorated fiber properties (tensile strength attenuation exceeding 40%) and limited product utilization; the chemical method faces challenges of high reagent consumption (2.5 tons of nitric acid are required to treat 1 ton of resin), serious equipment corrosion and degraded fiber properties; the pyrolysis method is restricted by low energy efficiency (heat loss of 30%-40%), secondary pollution and inverted product value. The industry's breakthrough directions focus on component directional conversion (such as resin to hydrogen production, fiber to synthesize silicon carbide) and process system integration, but there are bottlenecks such as the lack of efficient gasification technology, single fiber value-added path and low energy coupling efficiency.

[0039] The present application provides a resource recovery system and method for wind turbine blades to solve at least some of the problems in the related technologies. To better understand the technical solutions of the present application, the resource recovery system and method for wind turbine blades of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0040] See Figure 1 As shown, an embodiment of the present application provides a resource recovery method for wind turbine blades, including steps S1-S4:

[0041] Step S1, hydrogen and oxygen are prepared by electrolysis. Hydrogen and oxygen can be simultaneously prepared by electrolyzing water driven by green electricity. Water can be used as a raw material, and the electrolytic cell is connected to a renewable energy network supply system such as wind power and photovoltaic to carry out the electrolysis reaction. Driven by the stable supply of green electricity, water is decomposed into oxygen and hydrogen. Hydrogen and oxygen can be collected, purified and stored through independent pipelines or collection systems respectively to provide a clean gas source for downstream processes or other industrial uses. Among them, the hydrogen outlet is connected to the gas storage unit, and the purity is >99.99% v / v. Among them, green electricity can also be used in the process flows of steps 2, 3 and 4.

[0042] Step S2, the retired wind turbine blades are sorted to obtain epoxy resin and glass fiber. The retired wind turbine blades are pretreated by mechanical grinding and air classification to separate epoxy resin and glass fiber.

[0043] Step S3, the oxygen prepared by electrolysis is used as a gasifying agent, and the epoxy resin is subjected to a gasification reaction to be decomposed into syngas and purified to produce hydrogen. The separated epoxy resin is decomposed into syngas and purified to produce hydrogen by using the gasification reforming technology.

[0044] Step S4, silicon carbide material is prepared from the glass fiber and conductive carbon black by using the flash Joule heating method. Silicon carbide material is prepared from the separated glass fiber and conductive carbon black by using the flash Joule heating method.

[0045] The method for resource recovery of wind turbine blades provided by this application realizes the efficient separation of epoxy resin and glass fiber, the gasification of epoxy resin, and the synthesis of silicon carbide from glass fiber by flash Joule heating through a collaborative process of electrolysis, sorting, gasification, and flash Joule heating, achieving the high-value utilization of all components of wind turbine blades and solving the problem of solid waste treatment in the industry.

[0046] In some alternative embodiments, in step S2 above, the sorting of retired wind turbine blades to obtain epoxy resin and glass fiber may further include steps S21 - S23:

[0047] Step S21, crush the retired wind turbine blades to obtain blade fragments. The discarded retired wind turbine blades can be introduced into a crusher to be crushed into blade fragments.

[0048] Step S22, grind the blade fragments to obtain blade powder. Then introduce the blade fragments into a grinder to further crush and grind them to the required particle size.

[0049] Step S23, perform air classification on the blade powder to separate and obtain the epoxy resin and the glass fiber. Then send the ground material into a multi-stage vibrating air classifier to perform classification and separation using the aerodynamic characteristics of particles, separating and obtaining components rich in epoxy resin and glass fiber, namely the epoxy resin and the glass fiber components.

[0050] In some alternative embodiments, in step S3 above, using the oxygen prepared by electrolysis as a gasifying agent to decompose the epoxy resin through a gasification reaction into syngas and purify it to produce hydrogen may further include steps S31 - 33:

[0051] Step S31, gasify the epoxy resin under predetermined temperature, pressure, and gasifying agent conditions to generate syngas containing components such as H2, CO, and CO2. The epoxy resin-containing material obtained by air classification can be introduced into a gasifier and gasified under predetermined temperature, pressure, and gasifying agent (such as water vapor, oxygen) conditions to generate crude syngas containing components such as H2, CO, and CO2. Optionally, the volume ratio of H2 to CO in the syngas is 2:1 - 5:1.

[0052] Step S32, through a chemical shift process, increase the hydrogen content in the syngas and adjust the gas components. Through the water-gas shift reaction (WGS) or other chemical shift processes, increase the hydrogen content in the syngas and adjust the gas components.

[0053] Step S33, adopt a pressure swing adsorption separation process to separate high-purity hydrogen from the syngas to obtain a hydrogen product. Adopt methods such as pressure swing adsorption, membrane separation, or cryogenic separation to separate high-purity hydrogen from the syngas (i.e., the gas mixture) to obtain a hydrogen product meeting industrial applications.

[0054] In some alternative embodiments, in step S4 above, the preparation of the silicon carbide material from the glass fiber and the conductive carbon black may further include: mixing the glass fiber and the conductive carbon black in a mass ratio of 2:1 to 5:1, and synthesizing the silicon carbide material at a temperature of 2000°C to 2500°C by using the flash Joule heating method.

[0055] Among them, the glass fiber separated by air separation and the externally supplemented conductive carbon black can be mixed in a predetermined ratio, and the mass ratio can be 2:1 to 5:1. Then, the mixture is placed in a flash Joule heating reactor, and a large current is passed through it to generate high-temperature Joule heat in the conductive carbon black in a very short time. Further, under the action of a high temperature of 2000°C to 2500°C in a clockwise direction, a chemical reaction occurs between the glass fiber and the carbon black to in-situ synthesize silicon carbide. The reacted silicon carbide product can be cooled, crushed and screened to obtain silicon carbide powder with a uniform particle size distribution and high purity.

[0056] See Figure 2 As shown, the embodiment of the present application also provides a wind turbine blade resource recovery system for implementing the wind turbine blade resource recovery system described in the above embodiments and implementation manners. The wind turbine blade resource recovery system may include:

[0057] An electrolysis device 10 for electrolytically preparing hydrogen and oxygen. Hydrogen and oxygen can be synchronously prepared by electrolyzing water driven by green electricity. Water can be used as a raw material, and an electrolytic cell is connected to a renewable energy network supply system such as wind power and photovoltaic to carry out an electrolysis reaction.

[0058] A sorting device 20 for sorting retired wind turbine blades to obtain epoxy resin and glass fiber. The retired wind turbine blades can be mechanically ground and pneumatically sorted by the sorting device 20 to separate the epoxy resin and the glass fiber.

[0059] A gasification device 30, connected to the electrolysis device 10 and the sorting device 20, for using the oxygen prepared by the electrolysis device 10 as a gasification agent to decompose the epoxy resin by a gasification reaction into syngas and purify it to produce hydrogen. In this way, the separated epoxy resin is decomposed into syngas and purified to produce hydrogen by the gasification device 30 using the gasification reforming technology. Driven by the stable supply of green electricity, water is electrolyzed into oxygen and hydrogen.

[0060] A flash Joule heating device 40, using a flash Joule heating reactor, connected to the sorting device 20, for preparing silicon carbide material from the glass fiber and the conductive carbon black. In this way, the separated glass fiber and conductive carbon black are prepared into silicon carbide material by the flash Joule heating device 40 using the flash Joule heating method.

[0061] The fan blade resource recovery system provided by this application realizes the efficient separation of epoxy resin and glass fiber, the gasification of epoxy resin, and the synthesis of silicon carbide from glass fiber by flash Joule heating through the collaborative cooperation of electrolysis equipment, sorting equipment, gasification equipment, and flash Joule heating equipment, achieving the high-value utilization of all components of fan blades and solving the problem of solid waste treatment in the industry.

[0062] In some alternative embodiments, the electrolysis device 10 may include a water inlet pipeline, an energized electrode, a gas transmission pipeline, and a gas storage unit. The water inlet pipeline is used to connect to electrolyzed water, the energized electrode is used to connect to a renewable energy network, the gas transmission pipeline is connected to the gasification device 30 and is used to output the oxygen generated by electrolysis, and the gas storage unit is used to store the hydrogen generated by electrolysis with a purity > 99.99% v / v. Hydrogen and oxygen can be collected, purified, and stored through independent pipelines or collection systems respectively to provide a clean gas source for downstream processes or other industrial uses.

[0063] In some alternative embodiments, the sorting device 20 may include:

[0064] A crusher for crushing retired fan blades to obtain blade fragments. The discarded retired fan blades can be introduced into a mechanical crusher to be crushed into blade fragments.

[0065] A pulverizer connected to the crusher for pulverizing the blade fragments to obtain blade powder. The blade fragments can be introduced into a particle size classification pulverizer to be further crushed and ground to the required particle size.

[0066] A multi-stage vibrating air classifier for air sorting the blade powder to separate the epoxy resin and the glass fiber. The milled material can be fed into the multi-stage vibrating air classifier, and classified and sorted using the aerodynamic characteristics of particles to separate the epoxy resin and glass fiber components, which are components rich in epoxy resin and glass fiber. Among them, the air sorting particle size is controlled in the range of 50 - 1000 μm, and the air classifier is equipped with a cyclone separator and an electrostatic precipitator, and the working air pressure is maintained at 0.1 - 0.3 Mpa.

[0067] In some alternative embodiments, the gasification device 30 includes a fluidized bed gasifier, a multi-stage gas conversion tower (i.e., a gas conversion reactor), and a pressure swing adsorption (PSA) separator, which are combined to form a continuous processing line. The fluidized bed gasification path is connected to the electrolysis device 10 and is used to connect to the oxygen produced by the electrolysis device 10. The volume ratio of H2 to CO in the syngas of the gas conversion tower is 2:1 - 5:1, and the pressure swing adsorption separator includes a molecular sieve adsorption bed with a diameter of 5 mm - 10 mm, and the desorption pressure ≤ 50 kPa.

[0068] Among them, the working temperature of the fluidized bed gasifier is 800°C - 1400°C. The volume ratio of H2 to CO in the syngas of the gas shift tower is adjusted by the water-carbon ratio, and the control range is 2:1 - 5:1. The pressure swing adsorption separator includes a 13X molecular sieve adsorption bed with a diameter of 5 - 10 mm, and the desorption pressure ≤ 50 kPa.

[0069] In some alternative embodiments, the flash Joule heating device 40 mixes the glass fiber and the conductive carbon black in a mass ratio of 2:1 - 5:1, and synthesizes a silicon carbide material at a temperature of 2000°C - 2500°C.

[0070] With the above settings, the energy coupling modes of the electrolysis device 10, the sorting device 20, the gasification device 30, and the flash Joule heating device 40 are as follows: the epoxy resin recovered by the sorting device 20 and the oxygen electrolytically prepared by the electrolysis device 10 are supplied to the gasification device 30 for hydrogen production by gasification, and the glass fiber recovered by the sorting device 20 is supplied to the flash Joule heating device 40 as a raw material for silicon carbide. Through multi-stage material collaborative conversion, this system realizes the high-value utilization of all components of wind turbine blades, significantly improves the efficiency of green hydrogen production, and at the same time solves the problem of composite solid waste disposal. It has technical advantages such as a compact process flow, high resource utilization rate, and low carbon emissions. It overcomes problems in related technologies such as a single hydrogen production route, difficult treatment of waste blades, and high energy consumption in silicon carbide production, and realizes an integrated preparation system for energy cleaning, solid waste resource utilization, and high-value-added products.

[0071] See Figure 3 As shown, there are two embodiments of the wind turbine blade resource recovery system and method provided by this application:

[0072] Embodiment 1

[0073] The electrolysis device 10 electrolyzes water to produce oxygen and hydrogen: Select water with a purity of 99.8%, and input it into a proton exchange membrane electrolyzer connected to the green power supply system. Control the working temperature in the electrolyzer at 50°C - 80°C, the working pressure at 1 MPa - 2 MPa, and input a stable green power current to electrolyze water to produce oxygen and hydrogen. The generated oxygen is transported through a pipeline to be used as a gasifying agent in the epoxy resin hydrogen production by gasification process of the gasification device 30, and the hydrogen is collected and stored in a high-pressure gas tank for use in other industrial production or energy fields that require hydrogen.

[0074] Sorting equipment 20 for sorting: The discarded retired wind turbine blades are cut into appropriate sizes by a crusher and then fed into a pulverizer. The rotation speed of the pulverizer is adjusted to 1000 r / min - 1500 r / min, and the blades are ground into powders with a particle size range of 0.1 - 0.3 mm. Subsequently, the powders are fed into a multi-stage vibrating air classifier. By adjusting the air speed of the air classification equipment to 5 - 8 m / s, the powders are separated into light components (such as chopped glass fiber fragments, etc.) and heavy components (such as resin, fillers, etc.) using the principle of aerodynamics. Among them, the separated chopped glass fiber fragments can be reserved as raw materials for producing silicon carbide in the flash Joule heating equipment 40.

[0075] Gasification equipment 30 for gasification to produce hydrogen: The epoxy resin raw materials obtained from the sorting by the sorting equipment 20 are put into a fluidized bed gasifier. Oxygen generated by electrolyzing water in the electrolysis equipment 10 is introduced into the gasifier as a gasifying agent. At the same time, the temperature in the gasifier is controlled at 800 - 1000 °C, and the pressure is 1 - 3 MPa. Under the action of high temperature, high pressure and oxygen, the epoxy resin undergoes a gasification reaction to generate raw gas containing components such as hydrogen, carbon monoxide, and carbon dioxide. Then, the raw gas is introduced into a gas shift reactor, and an appropriate amount of steam is introduced into it. Under the action of a catalyst (such as an iron-based catalyst), the carbon monoxide reacts with the steam to undergo a shift reaction to generate carbon dioxide and more hydrogen, thereby increasing the hydrogen content in the gas. The gas mixture after gas shift enters a pressure swing adsorption separator. Using the pressure swing adsorption technology, under the conditions of an adsorption pressure of 1.5 - 2.5 MPa and a desorption pressure of 0.1 - 0.3 MPa, high-purity hydrogen (with a purity of up to more than 99.99%) is separated and stored together with the hydrogen generated by the electrolysis equipment 10 or supplied to the market.

[0076] Flash Joule heating equipment 40 for producing silicon carbide: The chopped glass fiber fragments separated from the sorting process of the sorting equipment 20 are mixed evenly with conductive carbon black in a mass ratio of 3:1 - 5:1 to form a raw material mixture. The raw material mixture is placed in the reaction cavity of the flash Joule heating equipment, and an electric current with a current intensity of 1000 - 3000 A is instantaneously passed through an external circuit. Utilizing the Joule heat effect of the conductive carbon black, the temperature in the reaction cavity is rapidly increased to 2000 - 2500 °C in a very short time (about 0.1 - 0.5 seconds). Under the action of high temperature, the silicon dioxide (SiO2) in the glass fiber reacts with the carbon black to generate silicon carbide (SiC). The generated silicon carbide is cooled and collected, and then subjected to subsequent crushing, screening, etc. to obtain silicon carbide products with particle sizes meeting the requirements, which can be applied in fields such as abrasives, refractory materials, and semiconductor materials.

[0077] Example 2

[0078] The electrolysis device 10 electrolyzes water to produce oxygen and hydrogen: Using the alkaline water electrolysis technology, an aqueous potassium hydroxide solution with a concentration of 30%-35% is selected as the electrolyte and placed in an alkaline electrolytic cell connected to green electricity. The working temperature in the electrolytic cell is maintained at 60-90°C, and the working current density is controlled at 0.1-0.3 A / cm 2 , and an electrolysis reaction is carried out to decompose water to produce oxygen and hydrogen. The oxygen is also used as a gasifying agent in the epoxy resin gasification process of the gasification device 30, and the hydrogen is stored for standby.

[0079] The sorting device 20 sorts: After the discarded retired wind turbine blades are preliminarily cleaned to remove surface dirt, they are crushed into small pieces with a side length of 5-10 cm using a large crusher. Then the small pieces of blades are sent into a hammer crusher and pulverizer, and further pulverized to a powder state with a particle size of 0.05-0.15 mm at a rotation speed of 800-1200 r / min. Then, in a multi-stage vibrating air classifier, air separation is carried out by adjusting the air speed to 3-6 m / s to obtain a light component rich in glass fiber and a heavy component containing components such as resin. The glass fiber part is used as a raw material for producing silicon carbide in the flash Joule heating device 40.

[0080] The gasification device 30 gasifies to produce hydrogen: The industrial-grade epoxy resin particles sorted by the sorting device 20 are sent into a fluidized bed gasifier, and the oxygen generated by electrolyzing water in the electrolysis device 10 is used as the gasifying agent. The temperature of the gasifier is controlled at 700-900°C, and the pressure is 0.5-1.5 MPa, so that the epoxy resin is in a fluidized state and fully contacts with oxygen to carry out a gasification reaction to generate raw gas. The raw gas enters a gas shift reactor, and under the action of a temperature of 200-300°C, a pressure of 1-2 MPa, and a catalyst (such as a copper-based catalyst), a gas shift reaction is carried out to increase the hydrogen content. The transformed gas uses membrane separation technology, and under the condition of a pressure difference of 0.5-1.0 MPa, high-purity hydrogen is separated and stored or sent out after being combined with the hydrogen in the electrolysis device 10.

[0081] The flash Joule heating device 40 produces silicon carbide: The glass fiber powder sorted by the sorting device 20 is mixed evenly with conductive carbon black at a mass ratio of 4:1-6:1. The mixed material is placed in the flash Joule heating device, and an electric current of 1500-2500 A is instantaneously applied, so that the temperature in the reaction zone quickly rises to 2200-2400°C within 0.2-0.4 seconds, and the reaction between the glass fiber and carbon black is completed to generate silicon carbide. After processes such as cooling, collection, and purification, high-purity silicon carbide products are obtained and used in fields such as the manufacture of high-end electronic devices.

[0082] It should be understood that the present application is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A resource recovery system for fan blades, characterized in that, Comprising: An electrolysis device for electrolytically preparing hydrogen and oxygen; A sorting device for sorting retired wind turbine blades to obtain epoxy resin and glass fiber; A gasification device connected to the electrolysis device and the sorting device, for using the oxygen prepared by the electrolysis device as a gasifying agent to gasify and decompose the epoxy resin into syngas and purify it to produce hydrogen; A flash Joule heating device connected to the sorting device, for preparing silicon carbide material from the glass fiber and conductive carbon black.

2. The fan blade resource recovery system according to claim 1, characterized in that The electrolysis device includes a water inlet pipeline, an energized electrode, a gas transmission pipeline, and a gas storage unit. The water inlet pipeline is used to access electrolyzed water, the energized electrode is used to access the renewable energy network, the gas transmission pipeline is connected to the gasification device and is used to output the electrolytically generated oxygen, and the gas storage unit is used to store the electrolytically generated hydrogen.

3. The resource recycling system for fan blades according to claim 1, wherein The sorting device includes: A crusher for crushing retired wind turbine blades to obtain blade fragments; A grinding machine connected to the crusher for grinding the blade fragments to obtain blade powder; A multi-stage vibrating air classifier for air-classifying the blade powder to separate the epoxy resin and the glass fiber.

4. The fan blade resource recovery system according to claim 1, wherein, The gasification device includes a fluidized bed gasifier, a multi-stage gas conversion tower, and a pressure swing adsorption separator. The fluidized bed gasification path is connected to the electrolysis device. The volume ratio of H2 to CO in the syngas of the gas conversion tower is 2:1 - 5:

1. The pressure swing adsorption separator includes a molecular sieve adsorption bed with a diameter of 5 mm - 10 mm, and the desorption pressure ≤ 50 kPa.

5. The resource recovery system for fan blades according to claim 1, wherein The flash Joule heating device mixes the glass fiber and conductive carbon black in a mass ratio of 2:1 - 5:1 and synthesizes silicon carbide material at a temperature of 2000 °C - 2500 °C.

6. A method for resource recovery of fan blades, characterized in that, Comprising: Electrolytically preparing hydrogen and oxygen; Sorting retired wind turbine blades to obtain epoxy resin and glass fiber; Using the oxygen prepared by electrolysis as a gasifying agent to gasify and decompose the epoxy resin into syngas and purify it to produce hydrogen; Using the flash Joule heating method to prepare silicon carbide material from the glass fiber and conductive carbon black.

7. The method for resource recovery of fan blades according to claim 6, characterized in that, The sorting of the retired wind turbine blades to obtain epoxy resin and glass fiber includes: Crushing the retired wind turbine blades to obtain blade fragments; Grinding the blade fragments to obtain blade powder; Air-classifying the blade powder to separate the epoxy resin and the glass fiber.

8. The method for resource recovery of fan blades according to claim 6, wherein, The using of the oxygen prepared by electrolysis as a gasifying agent to gasify and decompose the epoxy resin into syngas and purify it to produce hydrogen includes: Gasifying the epoxy resin under predetermined temperature, pressure, and gasifying agent conditions to generate syngas containing H2, CO, and CO2 components; Improving the hydrogen content in the syngas and adjusting the gas components through a chemical conversion process; Adopting a pressure swing adsorption separation process to separate high-purity hydrogen from the syngas to obtain hydrogen products.

9. The method for resource recovery of fan blades according to claim 8, wherein, The volume ratio of H2 to CO in the syngas is 2:1 - 5:

1.

10. The method for resource recovery of fan blades according to claim 6, wherein, The preparation of the silicon carbide material by using the flash Joule heating method from the glass fiber and the conductive carbon black includes: mixing the glass fiber and the conductive carbon black in a mass ratio of 2:1 - 5:1, and synthesizing the silicon carbide material at a temperature of 2000°C - 2500°C by using the flash Joule heating method.

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