Continuous carbon fiber recycling and regenerating system

Abstract

The invention belongs to the technical field of carbon fiber recovery, and particularly relates to a continuous carbon fiber recovery and regeneration system, which comprises a sulfuric acid electrolysis unit and a dynamic crosslinking treatment unit, the sulfuric acid electrolysis treatment unit utilizes a sulfuric acid electrolysis method to decompose a resin component in a carbon fiber composite material through an oxidation active substance generated by electrolysis, the dynamic cross-linking treatment unit is used for degrading resin in the carbon fiber composite material under a mild acidic condition through a dynamic cross-linking technology to generate high-quality recycled carbon fibers and linear polymers, and the method has the beneficial effects that the sulfuric acid electrolysis method is combined with the dynamic cross-linking technology; resin and carbon fibers in the carbon fiber composite material are effectively decomposed and recycled, and resource waste is reduced; the dynamic crosslinking treatment unit is carried out under a mild acidic condition, high-quality recycled carbon fibers and linear polymers are generated, and the performance of recycled materials is ensured; the dynamic crosslinking technology endows the composite material with multiple functions of rapid welding, reprocessing, deformation, self-healing and the like, the application range of the material is widened, and the service life of the material is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber recovery, and in particular to a continuous carbon fiber recovery and regeneration system. Background Art

[0002] Carbon fiber composite materials are widely used in aerospace, automobile manufacturing, wind energy and sporting goods due to their advantages such as high strength, light weight and corrosion resistance.

[0003] In the related technologies, the current carbon fiber recycling methods mostly use pyrolysis or solvent methods. The pyrolysis and solvent methods can usually only recycle short fibers, but cannot effectively recycle continuous fibers. In addition, the pyrolysis method will cause the carbon fiber to burn to a certain extent or its performance will deteriorate during the recycling process. Therefore, we propose a continuous carbon fiber recycling and regeneration system.

[0004] The above information disclosed in this Background section is only for understanding the background of the present inventive concept and therefore it may contain information that does not constitute prior art. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a continuous carbon fiber recycling and regeneration system to solve the current carbon fiber recycling methods proposed in the above background technology, most of which adopt pyrolysis method or solvent method. The pyrolysis method and solvent method can usually only recycle short fibers, but cannot effectively recycle continuous fibers. In the process of recycling carbon fibers by pyrolysis method, the carbon fibers will be burned to a certain extent or their performance will be degraded.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a continuous carbon fiber recycling and regeneration system, including a sulfuric acid electrolysis unit and a dynamic cross-linking treatment unit,

[0007] Sulfuric acid electrolysis treatment unit: Using the electrolytic sulfuric acid method, the oxidizing active substances generated by electrolysis decompose the resin components in the carbon fiber composite material. This treatment unit is suitable for various resins and can maintain the strength of the recycled carbon fiber;

[0008] The sulfuric acid electrolysis treatment unit comprises the following components:

[0009] A reaction tank, which is made of corrosion-resistant material, such as polytetrafluoroethylene or stainless steel, and is required to be able to withstand corrosion from the electrolyte;

[0010] The electrode system includes an anode and a cathode. The anode is made of an inert material, such as platinum or nickel, and is required to withstand corrosion during the electrolysis process. The cathode is made of stainless steel and is connected to a power source to complete a current loop.

[0011] A power supply, wherein the power supply adopts a direct current power supply and can provide stable current and voltage;

[0012] A stirring system, using either mechanical stirring or bubble stirring, to ensure the uniformity and reaction rate of the electrolyte;

[0013] The temperature control system includes a temperature sensor, a heating device and a cooling device, which is used to keep the temperature in the reaction tank within the optimal range to improve the reaction rate and effect;

[0014] A drainage system with a filter and a collection tank to discharge the treated waste liquid and collect the reusable clear liquid;

[0015] Dynamic cross-linking processing unit: Through dynamic cross-linking technology, the resin in the carbon fiber composite material is degraded under mild acidic conditions to generate high-quality recycled carbon fiber and linear polymer. This processing unit enables the composite material to have rapid welding, reprocessing, deformation and self-healing functions;

[0016] The dynamic cross-linking processing unit comprises the following parts:

[0017] A feeding system, used to accurately control the dosage of the cross-linking agent, including a delivery pipeline for the cross-linking agent and a cross-linking agent spraying device;

[0018] The discharging system is used to transport the product after the reaction to the next processing unit, and includes a conveying pipeline and a conveying pump connected to the next processing unit.

[0019] As an optimized technical solution, the system also includes a separation and purification unit, which is used to separate the decomposed resin and carbon fiber, and purify the recovered carbon fiber to ensure its quality and performance;

[0020] The separation and purification unit comprises the following parts:

[0021] A separator, used for preliminary separation of resin and carbon fiber, the separator can adopt one of centrifugal separation or gravity separation;

[0022] Filtration system, including multi-stage filters, to further remove resin residues and other impurities;

[0023] A washing system, which washes the recovered carbon fiber with solvent or water to remove resin and impurities attached to the surface;

[0024] A drying system, which uses hot air drying or vacuum drying to dry the washed carbon fiber;

[0025] The collection system collects and stores the purified carbon fiber for subsequent use.

[0026] As an optimized technical solution, the system also includes a recycling and recombination unit, which reintegrates the recycled carbon fibers into new composite materials to produce new carbon fiber reinforced plastics;

[0027] The regeneration and recombination unit comprises the following parts:

[0028] Mixer: used to evenly mix the recycled carbon fiber with the resin matrix material;

[0029] Extruder: The mixed material is extruded to form continuous carbon fiber reinforced plastic;

[0030] Die: used to form the extruded material into the desired shape and size;

[0031] Curing oven: Cures the resin matrix material by heating to enhance the mechanical properties of the composite material;

[0032] Cooling system: used to quickly cool the cured composite material to prevent deformation, and uses air cooling to cool down;

[0033] Finished product collection system: collect and store the final product.

[0034] As an optimized technical solution, the system also includes a quality control detection unit, which performs quality detection on the recovered and regenerated carbon fiber and its products to ensure that they meet relevant standards and requirements;

[0035] The quality control detection unit includes the following parts:

[0036] Testing equipment: including tensile testing machines, impact testing machines, and scanning electron microscopes, used to test the mechanical properties and microstructure of carbon fiber and its composite materials;

[0037] Sensors and detectors: used to monitor temperature, pressure, and strain parameters in real time during the detection process;

[0038] Data acquisition system: processes and stores data collected by sensors and detectors;

[0039] Control system: used to control the operation of the testing equipment to ensure the accuracy and stability of the testing process;

[0040] Sample preparation unit: includes cutting and grinding equipment, used to prepare samples for testing.

[0041] As an optimized technical solution, the detection process of the detection equipment for carbon fiber and its composite materials is as follows:

[0042] Tensile testing machine: Fix the sample in the fixture of the tensile testing machine and gradually apply tensile force until the sample breaks. The parameters tested are tensile strength, elongation at break, and Young's modulus. According to the standard, ASTM D3039 is used to measure tensile strength and elongation at break to ensure that the sample meets the design requirements;

[0043] Impact testing machine: Fix the sample in the impact testing machine, apply impact force through a pendulum or impact hammer, and measure the energy absorption capacity of the sample. The parameters tested are impact strength and energy absorption. According to the standard, ASTM D256 is used to measure the impact strength to ensure that the sample has sufficient toughness;

[0044] Scanning electron microscope (SEM): After the sample surface is metal-plated, it is placed in the SEM for scanning to observe its microstructure. The parameters detected are fiber distribution, interface bonding, and porosity. By observing the fiber distribution and interface bonding, the uniformity and integrity of the composite material are ensured.

[0045] As an optimized technical solution, in the electrolytic sulfuric acid treatment unit, the electrolyte is dilute sulfuric acid. During the electrolysis process, the water molecules in the sulfuric acid are electrolyzed to generate hydrogen and oxygen. In this process, sulfuric acid itself does not participate in the reaction, but it provides the necessary ion environment to improve the conductivity of water. The concentration range of sulfuric acid electrolyte is between 0.5M and 2M. Such a concentration can provide sufficient conductivity without excessively corrosive to the equipment. The temperature range is controlled between 30°C and 40°C to ensure the stability and efficiency of the reaction.

[0046] As an optimized technical solution, the working principle of the dynamic cross-linking treatment unit is based on the introduction of a dynamic cross-linking agent during the reaction process to form reversible cross-links between polymer chains. The process is as follows:

[0047] Raw material preparation: Add carbon fiber composite material and cross-linking agent into the reactor;

[0048] Heating reaction: Start the heating system to make the temperature in the reactor reach the required reaction temperature;

[0049] Dynamic cross-linking: At high temperatures, the cross-linking agent reacts with the polymer chain to form a dynamic cross-linking network. These cross-links break and reform under certain conditions, making the material reversible and self-healing.

[0050] Cooling and discharging: After the reaction is completed, start the cooling system to cool the product to room temperature, and then transport the product to the next processing unit through the discharging system.

[0051] As an optimized technical solution, the types of the cross-linking agent include:

[0052] Disulfide cross-linking agents: specifically disulfides, which have reversible disulfide bonds that can be broken and reformed under the action of heat or light;

[0053] Imidyl crosslinker: specifically N-hydroxysuccinimide (NHS), used to form a stable amide bond;

[0054] Bifunctional crosslinkers: specifically bismaleimide (BMI), which has two reactive functional groups and can react with different positions on the polymer chain.

[0055] The beneficial effects of the present invention are:

[0056] By combining electrolytic sulfuric acid method and dynamic cross-linking technology, the resin and carbon fiber in carbon fiber composite materials can be effectively decomposed and recovered to reduce resource waste; the dynamic cross-linking treatment unit is carried out under mild acidic conditions to generate high-quality recycled carbon fiber and linear polymers to ensure the performance of recycled materials; dynamic cross-linking technology gives composite materials multiple functions such as rapid welding, reprocessing, deformation and self-healing, which improves the application range and service life of the materials; the separation and purification unit ensures that the recycled carbon fiber is pure and free of impurities through centrifugal separation, filtration, washing and drying, and meets high quality requirements; the regeneration and recombination unit reintegrates the recycled carbon fiber into new composite materials to produce new carbon fiber reinforced plastics or other products to achieve closed-loop recycling; the quality control and inspection unit uses equipment such as tensile tests, impact tests and scanning electron microscopes to ensure that the recycled and regenerated carbon fiber and its products meet relevant standards and requirements, thereby ensuring product reliability and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 The present invention provides a structural connection block diagram of a continuous carbon fiber recycling and regeneration system. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0059] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Reference Figure 1 , a continuous carbon fiber recycling and regeneration system, including a sulfuric acid electrolysis unit and a dynamic cross-linking treatment unit,

[0062] Sulfuric acid electrolysis treatment unit: Using the electrolytic sulfuric acid method, the oxidizing active substances generated by electrolysis decompose the resin components in the carbon fiber composite material. This treatment unit is suitable for various resins and can maintain the strength of the recycled carbon fiber;

[0063] The sulfuric acid electrolysis treatment unit consists of the following components:

[0064] A reaction tank, which is made of corrosion-resistant material, such as polytetrafluoroethylene or stainless steel, and is required to be able to withstand corrosion from the electrolyte;

[0065] The electrode system includes an anode and a cathode. The anode is made of an inert material, such as platinum or nickel, and is required to withstand corrosion during the electrolysis process. The cathode is made of stainless steel and is connected to a power source to complete a current loop.

[0066] Power supply: The power supply adopts DC power supply, which can provide stable current and voltage;

[0067] A stirring system, using either mechanical stirring or bubble stirring, to ensure the uniformity and reaction rate of the electrolyte;

[0068] The temperature control system includes a temperature sensor, a heating device and a cooling device, which is used to keep the temperature in the reaction tank within the optimal range to improve the reaction rate and effect;

[0069] A drainage system with a filter and a collection tank to discharge the treated waste liquid and collect the reusable clear liquid;

[0070] Dynamic cross-linking processing unit: Through dynamic cross-linking technology, the resin in the carbon fiber composite material is degraded under mild acidic conditions to generate high-quality recycled carbon fiber and linear polymer. This processing unit enables the composite material to have rapid welding, reprocessing, deformation and self-healing functions;

[0071] The working principle of the dynamic cross-linking treatment unit is based on the introduction of a dynamic cross-linking agent during the reaction process, so that reversible cross-linking bonds are formed between polymer chains. The specific process is as follows:

[0072] Raw material preparation: Add carbon fiber composite material and cross-linking agent into the reactor;

[0073] Heating reaction: Start the heating system to make the temperature in the reactor reach the required reaction temperature;

[0074] Dynamic crosslinking: At high temperatures, the crosslinking agent reacts with the polymer chains to form a dynamic crosslinking network. These crosslinks can break and reform under certain conditions, making the material reversible and self-healing;

[0075] Cooling and discharging: After the reaction is completed, start the cooling system to cool the product to room temperature, and then transport the product to the next processing unit through the discharging system.

[0076] As an optimized technical solution, the system also includes a separation and purification unit, which is used to separate the decomposed resin and carbon fiber, and purify the recovered carbon fiber to ensure its quality and performance;

[0077] The separation and purification unit consists of the following parts:

[0078] A separator, used for preliminary separation of resin and carbon fiber, the separator can adopt one of centrifugal separation or gravity separation;

[0079] Filtration system, including multi-stage filters, to further remove resin residues and other impurities;

[0080] A washing system, which washes the recovered carbon fiber with solvent or water to remove resin and impurities attached to the surface;

[0081] A drying system, which uses hot air drying or vacuum drying to dry the washed carbon fiber;

[0082] The collection system collects and stores the purified carbon fiber for subsequent use;

[0083] Working principle and process:

[0084] Initial separation: The decomposed resin and carbon fiber mixture is sent to the separator to separate the resin and carbon fiber by centrifugal force or gravity;

[0085] Filtration: The separated carbon fibers pass through multi-stage filters to remove fine resin particles and other impurities;

[0086] Washing: The filtered carbon fiber is sent to the washing system and washed with solvent or water to further remove residual resin and impurities;

[0087] Drying: The washed carbon fiber enters the drying system and is dried by hot air or vacuum drying technology;

[0088] Collection: The dried carbon fiber is collected and stored through a collection system.

[0089] As an optimized technical solution, the system also includes a recycling and recombination unit, which reintegrates the recycled carbon fibers into new composite materials to produce new carbon fiber reinforced plastics;

[0090] The regeneration and recombination unit consists of the following parts:

[0091] Mixer: used to evenly mix the recycled carbon fiber with the resin matrix material;

[0092] Extruder: The mixed material is extruded to form continuous carbon fiber reinforced plastic;

[0093] Die: used to form the extruded material into the desired shape and size;

[0094] Curing oven: Cures the resin matrix material by heating to enhance the mechanical properties of the composite material;

[0095] Cooling system: used to quickly cool the cured composite material to prevent deformation, and uses air cooling to cool down;

[0096] Finished product collection system: collect and store the final product;

[0097] Working principle and process:

[0098] Raw material preparation: Add recycled carbon fiber and resin matrix material into the mixer in proportion;

[0099] Mixing: Start the mixer to mix the carbon fiber and the resin matrix material evenly;

[0100] Extrusion molding: The mixed materials are fed into the extruder to form continuous carbon fiber reinforced plastics through the extrusion molding process;

[0101] Die forming: The extruded material is fed into a die and formed into the desired shape and size;

[0102] Curing: The formed material is sent into a curing furnace to cure the resin matrix material by heating to enhance the mechanical properties of the composite material;

[0103] Cooling: The solidified material is sent to the cooling system for rapid cooling to prevent deformation;

[0104] Collection: The cooled final product is collected and stored through a collection system.

[0105] As an optimized technical solution, the system also includes a quality control detection unit, which performs quality detection on the recovered and regenerated carbon fiber and its products to ensure that they meet relevant standards and requirements;

[0106] The quality control testing unit consists of the following parts:

[0107] Testing equipment: including tensile testing machines, impact testing machines, and scanning electron microscopes, used to test the mechanical properties and microstructure of carbon fiber and its composite materials;

[0108] Sensors and detectors: used to monitor temperature, pressure, and strain parameters in real time during the detection process;

[0109] Data acquisition system: processes and stores data collected by sensors and detectors;

[0110] Control system: used to control the operation of the testing equipment to ensure the accuracy and stability of the testing process;

[0111] Sample preparation unit: including cutting and grinding equipment, used to prepare samples to be tested;

[0112] Working principle and process:

[0113] Sample preparation: Cut, polish and other processes are performed on the recycled and regenerated carbon fiber and its composite materials to ensure that the samples meet the testing requirements;

[0114] Mechanical properties testing: Use tensile testing machines, impact testing machines and other equipment to test the tensile strength, impact toughness and other mechanical properties of the samples;

[0115] Microstructure analysis: Use scanning electron microscope (SEM) and other equipment to observe the microstructure of the sample and analyze its fiber distribution, interface bonding, etc.

[0116] Data collection and analysis: Data from the detection process is collected through sensors and detectors, and processed and stored through the data acquisition system;

[0117] Result evaluation: Based on the test data, evaluate the quality of the sample to ensure that it meets the relevant standards and requirements.

[0118] In this embodiment, the detection process of the detection equipment on the carbon fiber and its composite material is as follows:

[0119] Tensile testing machine: Fix the sample in the fixture of the tensile testing machine and gradually apply tensile force until the sample breaks. The parameters tested are tensile strength, elongation at break, and Young's modulus. According to the standard, ASTM D3039 is used to measure tensile strength and elongation at break to ensure that the sample meets the design requirements;

[0120] Impact testing machine: Fix the sample in the impact testing machine, apply impact force through a pendulum or impact hammer, and measure the energy absorption capacity of the sample. The parameters tested are impact strength and energy absorption. According to the standard, ASTM D256 is used to measure the impact strength to ensure that the sample has sufficient toughness;

[0121] Scanning electron microscope (SEM): After the sample surface is metal-plated, it is placed in the SEM for scanning to observe its microstructure. The parameters detected are fiber distribution, interface bonding, and porosity. By observing the fiber distribution and interface bonding, the uniformity and integrity of the composite material are ensured.

[0122] In this embodiment, in the electrolytic sulfuric acid treatment unit, the electrolyte is dilute sulfuric acid. During the electrolysis process, the water molecules in the sulfuric acid are electrolyzed to generate hydrogen and oxygen. In this process, sulfuric acid itself does not participate in the reaction, but it provides the necessary ion environment to improve the conductivity of water. The concentration range of sulfuric acid electrolyte is between 0.5M and 2M. Such a concentration can provide sufficient conductivity without excessively corroding the equipment. The temperature range is controlled between 30°C and 40°C to ensure the stability and efficiency of the reaction.

[0123] Specifically, the working principle of the dynamic cross-linking treatment unit is based on the introduction of a dynamic cross-linking agent during the reaction process to form reversible cross-linking bonds between polymer chains. The process is as follows:

[0124] Raw material preparation: Add carbon fiber composite material and cross-linking agent into the reactor;

[0125] Heating reaction: Start the heating system to make the temperature in the reactor reach the required reaction temperature;

[0126] Dynamic cross-linking: At high temperatures, the cross-linking agent reacts with the polymer chain to form a dynamic cross-linking network. These cross-links break and reform under certain conditions, making the material reversible and self-healing.

[0127] Cooling and discharging: After the reaction is completed, the cooling system is started to cool the product to room temperature, and then the product is transported to the next processing unit through the discharging system;

[0128] The types of cross-linking agents include:

[0129] Disulfide cross-linking agents: specifically disulfides, which have reversible disulfide bonds that can be broken and reformed under the action of heat or light;

[0130] Imidyl crosslinker: specifically N-hydroxysuccinimide (NHS), used to form a stable amide bond;

[0131] Bifunctional crosslinkers: specifically bismaleimide (BMI), which has two reactive functional groups that can react with different positions on the polymer chain;

[0132] In the dynamic crosslinking treatment unit, one of the commonly used dynamic crosslinking agents is disulfide. Under the action of light or heat, the disulfide crosslinking agent can form and break disulfide bonds, thereby achieving dynamic crosslinking and de-crosslinking. The specific chemical reaction equation is as follows:

[0133] Cross-linking reaction: RSSR→2R-S+S2

[0134] Decrosslinking reaction: 2R-S · →RSSR

[0135] RSSR stands for disulfide, RS · represents sulfur radical and S2 represents sulfur molecule.

[0136] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot limit the scope of protection of the present invention in turn. Various combinations, modifications or equivalent substitutions of the technical solutions of the present invention by technicians in this field do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A continuous carbon fiber recycling and regeneration system, comprising a sulfuric acid electrolysis unit and a dynamic crosslinking treatment unit, characterized in that: Sulfuric acid electrolysis treatment unit: Using the electrolytic sulfuric acid method, the oxidizing active substances generated by electrolysis decompose the resin components in the carbon fiber composite material. This treatment unit is suitable for various resins and can maintain the strength of the recycled carbon fiber; The sulfuric acid electrolysis treatment unit comprises the following components: A reaction tank, which is made of corrosion-resistant material, such as polytetrafluoroethylene or stainless steel, and is required to be able to withstand corrosion from the electrolyte; The electrode system includes an anode and a cathode. The anode is made of an inert material, such as platinum or nickel, and is required to withstand corrosion during the electrolysis process. The cathode is made of stainless steel and is connected to a power source to complete a current loop. A power supply, wherein the power supply adopts a direct current power supply and can provide stable current and voltage; A stirring system, using either mechanical stirring or bubble stirring, to ensure the uniformity and reaction rate of the electrolyte; The temperature control system includes a temperature sensor, a heating device and a cooling device, which is used to keep the temperature in the reaction tank within the optimal range to improve the reaction rate and effect; A drainage system with a filter and a collection tank to discharge the treated waste liquid and collect the reusable clear liquid; Dynamic cross-linking processing unit: Through dynamic cross-linking technology, the resin in the carbon fiber composite material is degraded under mild acidic conditions to generate high-quality recycled carbon fiber and linear polymer. This processing unit enables the composite material to have rapid welding, reprocessing, deformation and self-healing functions; The dynamic cross-linking processing unit comprises the following parts: A feeding system, used to accurately control the dosage of the cross-linking agent, including a delivery pipeline for the cross-linking agent and a cross-linking agent spraying device; The discharging system is used to transport the product after the reaction to the next processing unit, and includes a conveying pipeline and a conveying pump connected to the next processing unit.

2. The continuous carbon fiber recycling system according to claim 1, characterized in that: The system also includes a separation and purification unit, which is used to separate the decomposed resin and carbon fiber and purify the recycled carbon fiber to ensure its quality and performance; The separation and purification unit comprises the following parts: A separator, used for preliminary separation of resin and carbon fiber, the separator can adopt one of centrifugal separation or gravity separation; Filtration system, including multi-stage filters, to further remove resin residues and other impurities; A washing system, which washes the recovered carbon fiber with solvent or water to remove resin and impurities attached to the surface; A drying system, which uses hot air drying or vacuum drying to dry the washed carbon fiber; The collection system collects and stores the purified carbon fiber for subsequent use.

3. The continuous carbon fiber recycling system according to claim 1, characterized in that: The system also includes a recycling and recombination unit, which reintegrates the recycled carbon fibers into new composite materials to produce new carbon fiber reinforced plastics; The regeneration and recombination unit comprises the following parts: Mixer: used to evenly mix the recycled carbon fiber with the resin matrix material; Extruder: The mixed material is extruded to form continuous carbon fiber reinforced plastic; Die: used to form the extruded material into the desired shape and size; Curing oven: Cures the resin matrix material by heating to enhance the mechanical properties of the composite material; Cooling system: used to quickly cool the cured composite material to prevent deformation, and uses air cooling to cool down; Finished product collection system: collect and store the final product.

4. The continuous carbon fiber recycling system according to claim 1, characterized in that: The system also includes a quality control detection unit, which performs quality detection on the recovered and regenerated carbon fiber and its products to ensure that they meet relevant standards and requirements; The quality control detection unit includes the following parts: Testing equipment: including tensile testing machines, impact testing machines, and scanning electron microscopes, used to test the mechanical properties and microstructure of carbon fiber and its composite materials; Sensors and detectors: used to monitor temperature, pressure, and strain parameters in real time during the detection process; Data acquisition system: processes and stores data collected by sensors and detectors; Control system: used to control the operation of the testing equipment to ensure the accuracy and stability of the testing process; Sample preparation unit: includes cutting and grinding equipment, used to prepare samples for testing.

5. The continuous carbon fiber recycling system according to claim 4, characterized in that: The detection process of the detection equipment for carbon fiber and its composite materials is as follows: Tensile testing machine: Fix the sample in the fixture of the tensile testing machine and gradually apply tensile force until the sample breaks. The parameters tested are tensile strength, elongation at break, and Young's modulus. According to the standard, ASTM D3039 is used to measure tensile strength and elongation at break to ensure that the sample meets the design requirements; Impact testing machine: Fix the sample in the impact testing machine, apply impact force through a pendulum or impact hammer, and measure the energy absorption capacity of the sample. The parameters tested are impact strength and energy absorption. According to the standard, ASTM D256 is used to measure the impact strength to ensure that the sample has sufficient toughness; Scanning electron microscope (SEM): After the sample surface is metal-plated, it is placed in the SEM for scanning to observe its microstructure. The parameters detected are fiber distribution, interface bonding, and porosity. By observing the fiber distribution and interface bonding, the uniformity and integrity of the composite material are ensured.

6. The continuous carbon fiber recycling system according to claim 1, characterized in that: In the electrolytic sulfuric acid treatment unit, the electrolyte is dilute sulfuric acid. During the electrolysis process, the water molecules in the sulfuric acid are electrolyzed to generate hydrogen and oxygen. In this process, sulfuric acid itself does not participate in the reaction, but it provides the necessary ion environment to improve the conductivity of water. The concentration range of sulfuric acid electrolyte is between 0.5M and 2M. Such a concentration can provide sufficient conductivity without excessively corroding the equipment. The temperature range is controlled between 30℃ and 40℃ to ensure the stability and efficiency of the reaction.

7. The continuous carbon fiber recycling system according to claim 1, characterized in that: The working principle of the dynamic cross-linking treatment unit is based on the introduction of a dynamic cross-linking agent during the reaction process, so that reversible cross-links are formed between polymer chains. The process is as follows: Raw material preparation: Add carbon fiber composite material and cross-linking agent into the reactor; Heating reaction: Start the heating system to make the temperature in the reactor reach the required reaction temperature; Dynamic cross-linking: At high temperatures, the cross-linking agent reacts with the polymer chain to form a dynamic cross-linking network. These cross-links break and reform under certain conditions, making the material reversible and self-healing. Cooling and discharging: After the reaction is completed, start the cooling system to cool the product to room temperature, and then transport the product to the next processing unit through the discharging system.

8. The continuous carbon fiber recycling system according to claim 1, characterized in that: The types of cross-linking agents include: Disulfide cross-linking agents: specifically disulfides, which have reversible disulfide bonds that can be broken and reformed under the action of heat or light; Imidyl crosslinker: specifically N-hydroxysuccinimide (NHS), used to form a stable amide bond; Bifunctional crosslinkers: specifically bismaleimide (BMI), which has two reactive functional groups and can react with different positions on the polymer chain.

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