Device and method for recovering carbon fibers and glass fibers

Abstract

The invention relates to a carbon fiber and glass fiber recovery device and method. The carbon fiber and glass fiber recovery device comprises a waste composite material supply unit, a reaction unit, a heat supply unit, a modification unit and a separation unit. The waste composite material supply unit may be provided with a crushing module for crushing the waste composite material and a storage module for storing the crushed waste composite material. The reaction unit may heat the waste composite material supplied from the waste composite material supply unit. The heat supply unit may provide heat to the reaction unit. The modification unit may separate the thermally decomposed gas discharged from the reaction unit into gas and oil. The separation unit may be provided with a separation unit that separates the product of the reaction unit into a first substance and a second substance, a first chamber that accommodates the first substance, and a second chamber that accommodates the second substance. According to the invention, the waste composite material can be subjected to crushing, rolling, primary thermal decomposition and secondary thermal decomposition through one procedure, so that carbon fibers and glass fibers are separated.

Description

Technical Field

[0001] The present invention relates to a device and method for recycling carbon fiber and glass fiber. Background Art

[0002] Wind power generation refers to a power generation method in which the kinetic energy of wind is used to rotate blades and converted into mechanical energy and then the mechanical energy is converted into electrical energy. As an alternative to existing power generation methods that mainly use fossil fuels, its application is increasing.

[0003] A wind turbine has a plurality of blades installed on the rotating shaft of the generator. In order to generate more electric power, the blades are made long and wide. The larger the size of the blade, the greater the weight of the blade. However, for energy efficiency, the blades must be made light. In addition, since the blades continuously collide with the wind, the strength of the blades must also be increased to ensure durability. To solve this problem, carbon fiber reinforced plastic or glass fiber reinforced plastic is used as the material of the blade. Composites containing carbon fiber and glass fiber are not only light but also have high strength, so they are applied to various fields such as the automotive field and the aviation field in addition to the blades.

[0004] However, after the blades of the wind turbine are damaged or their lifespan is exhausted, the disposal of waste blades becomes a problem. Generally, composites such as carbon fiber reinforced plastic or glass fiber reinforced plastic are difficult to reuse and are mostly landfilled in most cases. However, it is impossible to keep landfilling an increasing amount of composite waste, and the need for treatment methods other than landfilling or methods that can be reused is constantly emerging.

[0005] Therefore, it is necessary to develop a device and method for recycling carbon fiber or glass fiber from exhausted waste blades. In addition, in addition to waste blades, it is necessary to develop a device and method for recycling carbon fiber and glass fiber in waste composites discharged from the automotive industry, the aviation industry, etc.

[0006] Prior Art Documents

[0007] Patent Document 1: Korean Patent No. 10-1810284 (Title: Method for Separating Carbon Fiber from Waste Carbon Fiber Reinforced Plastic) Summary of the Invention

[0008] An object of the present invention is to provide a method for recycling carbon fiber and glass fiber that can separately recycle carbon fiber and glass fiber from waste composites through a single process.

[0009] An object of the present invention is to provide a method for recycling carbon fiber and glass fiber that can recover gas and fuel during the process of recycling carbon fiber and glass fiber from waste composites.

[0010] The carbon fiber and glass fiber recycling device according to an embodiment of the present invention includes a waste composite material supply unit, a reaction unit, a heat supply unit, a modification unit, and a separation unit. The waste composite material supply unit may include a crushing module for crushing the waste composite material and a storage module for storing the crushed waste composite material. The reaction unit may heat the waste composite material supplied from the waste composite material supply unit. The heat supply unit may supply heat to the reaction unit. The modification unit may separate the pyrolysis gas discharged from the reaction unit into gas and oil. The separation unit may include a separation part for separating the product of the reaction unit into a first substance and a second substance, a first chamber for accommodating the first substance, and a second chamber for accommodating the second substance.

[0011] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the reaction unit may include one pyrolysis reactor. The pyrolysis reactor may be a batch pyrolysis reactor. The first pyrolysis and the second pyrolysis may be sequentially performed in the pyrolysis reactor.

[0012] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the reaction unit may include at least two pyrolysis reactors.

[0013] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the plurality of pyrolysis reactors may be batch pyrolysis reactors.

[0014] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the plurality of pyrolysis reactors may be continuous pyrolysis reactors.

[0015] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the modification unit may include a catalyst tower, a heat exchanger, and a separation tank.

[0016] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the modification unit may further include a cleaning tank and a pressure control tank.

[0017] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the separation unit may further include a first carding module for carding the first substance, a first granulation module for granulating the first substance, a second carding module for carding the second substance, and a second granulation module for granulating the second substance.

[0018] In the carbon fiber and glass fiber recycling device according to an embodiment of the present invention, it may be that the separation unit detects the lengths of the first substance and the second substance and respectively makes them flow into the first granulation module and the second granulation module when the lengths of the first substance and the second substance are 5 mm or less.

[0019] In a carbon fiber and glass fiber recycling device according to an embodiment of the present invention, the heat supply unit may include a burner, a heat exchanger, a blower, a scrubber, and a chimney.

[0020] A carbon fiber and glass fiber recycling method according to an embodiment of the present invention includes: a waste composite material supply step of supplying a waste composite material into a reactor; a first heating step of first heating the waste composite material; a second heating step of second heating the waste composite material after the first heating; an oil extraction step of extracting oil from the pyrolysis gas discharged from the first heating step; and a separation step of separating the product of the second heating step into a first substance and a second substance.

[0021] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the first heating step and the second heating step described above may be sequentially performed in a single pyrolysis reactor.

[0022] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the first heating step may be performed in a first pyrolysis reactor, and the second heating step described above may be performed in a second pyrolysis reactor.

[0023] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the heat source in the first heating step may be pyrolysis gas and LNG / LPG, and the heat source in the second heating step may be combustion gas.

[0024] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, a zeolite series catalyst may be used for the modification of pyrolysis gas.

[0025] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the modified pyrolysis gas may be cooled and separated into gas and oil.

[0026] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the first substance and the second substance may be separated by density difference in the separation step.

[0027] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the first substance and the second substance may be separately carded and granulated in the separation step.

[0028] In a carbon fiber and glass fiber recycling method according to an embodiment of the present invention, the lengths of the first substance and the second substance may be detected in the separation step, and granulation may be performed separately when the lengths of the first substance and the second substance are 5 mm or less.

[0029] In the method for recycling carbon fiber and glass fiber according to an embodiment of the present invention, before the step of supplying waste composite materials, it may further include a step of crushing the waste composite materials and a step of drying the crushed waste composite materials under hot air.

[0030] According to an embodiment of the present invention, carbon fiber or glass fiber can be effectively separated from waste composite materials.

[0031] According to an embodiment of the present invention, the thermal decomposition gas generated during the recycling process of carbon fiber and glass fiber can be reused as fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a block diagram schematically showing a carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention.

[0033] Figure 2 It is a view schematically showing a waste composite material supply unit and a reaction unit in a carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention.

[0034] Figure 3 It is a view showing that two thermal decomposition reactors are stacked according to an embodiment of the present invention.

[0035] Figure 4 It is a view schematically showing a waste composite material supply unit, a reaction unit, and a heat supply unit in a carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention.

[0036] Figure 5 It is a view schematically showing a reaction unit, a heat supply unit, and a modification unit in a carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention.

[0037] Figure 6 It is a view schematically showing a reaction unit and a separation unit in a carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention.

[0038] Figure 7 It is a flowchart showing a carbon fiber and glass fiber recycling method according to an embodiment of the present invention.

[0039] Figure 8 It is a view showing the whole carbon fiber and glass fiber recycling apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The present invention can be subjected to various transformations and can have various embodiments. Specific embodiments are illustrated below and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0041] The terms used in the present invention are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It should be understood that terms such as "comprising / including" or "having" in the present invention are used to specify the existence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and do not preclude the existence or additional possibility of one or more other features or numbers, steps, actions, components, accessories, or combinations thereof in advance.

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that the same components in the drawings are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may affect the gist of the present invention are omitted. For the same reason, some components in the drawings are exaggerated, omitted, or shown approximately.

[0043] Figure 1 is a block diagram schematically showing a carbon fiber and glass fiber recycling device according to an embodiment of the present invention, Figure 2 is a view schematically showing a waste composite material supply unit and a reaction unit in a carbon fiber and glass fiber recycling device according to an embodiment of the present invention, Figure 3 is a view showing that two thermal decomposition reactors are stacked according to an embodiment of the present invention, Figure 4 is a view schematically showing a waste composite material supply unit, a reaction unit, and a heat supply unit in a carbon fiber and glass fiber recycling device according to an embodiment of the present invention, Figure 5 is a view schematically showing a reaction unit, a heat supply unit, and a modification unit in a carbon fiber and glass fiber recycling device according to an embodiment of the present invention, Figure 6 is a view schematically showing a reaction unit and a separation unit in a carbon fiber and glass fiber recycling device according to an embodiment of the present invention.

[0044] As Figure 1 shown, the carbon fiber and glass fiber recycling device 1000 according to the present invention includes a waste composite material supply unit 1100, a reaction unit 1200, a heat supply unit 1300, a modification unit 1400, and a separation unit 1500.

[0045] The waste composite material supply unit 1100 supplies the waste composite material to the reaction unit 1200. The waste composite material supply unit 1100 may preprocess the waste composite material into a state suitable for thermal decomposition and then supply it to the reaction unit 1200.

[0046] As Figure 2As shown in the figure, the waste composite material supply unit 1100 includes a crushing module 1110, a conveying module 1120, a storage module 1130, and a feeding module 1140. The crushing module 1110 crushes the recycled waste composite material into a specified size. For waste composite materials, the length can reach up to 50 m, so it is not easy to directly crush them. Therefore, the waste composite material is cut in the length direction and then fed into the crushing module 1110. The waste composite material can be cut into lengths of less than 10 m, and a wire saw or the like can be used.

[0047] The crushing module 1110 crushes the waste composite material cut into a specified length into a thickness of less than 20 mm. A large amount of dust is generated during the crushing process of the waste composite material. In order not to let the dust leak outside the crushing module 1110, the feeding part of the crushing module 1110 can be sealed.

[0048] In addition, the crushing module 1110 can be equipped with a dust suction part to remove the dust generated during the crushing process. In order to capture the dust, the air can be continuously circulated inside the crushing module 1110.

[0049] In order to make the size of the crushed waste composite material smaller, in another embodiment, the crushed waste composite material can also be roll-pressed again.

[0050] The conveying module 1120 conveys the crushed waste composite material to the next process. In the recycling process, a conveyor can be used to convey the waste composite material to each unit and each module. Multiple conveyors can be arranged continuously or side by side along the moving path of the waste composite material. The waste composite material can be screened during transportation.

[0051] The particle sizes of the crushed waste composite materials are different. When the waste composite materials with different particle sizes are thermally decomposed, the small particle size blade fragments will quickly carbonize, and there is a concern about contaminating the thermally decomposed products. For this reason, the crushed waste blades can be filtered on a sieve, and when the size of the crushed particles is below a specified size, they are separated under the sieve.

[0052] On the other hand, the crushing module 1110 can adjust the crushing size of the waste composite material. The crushing size of the waste composite material can be adjusted according to the target state of the waste composite material and the final product. When long fibers can be recycled, the crushing size of the waste blades can be made larger.

[0053] The conveying module 1120 conveys the crushed waste composite material to the storage module 1130. The storage module 1130 stores the waste composite material for a specified time before it is fed into the reactor. The storage module 1130 can be supplied with hot air to dry the stored waste composite material.

[0054] Since the crushed waste composite material contains moisture, water vapor is generated during the thermal decomposition process. By drying the waste composite material, the generation of water vapor can be reduced. The hot air can be received from the heat supply unit 1300 described later.

[0055] In this embodiment, the waste composite material is stored in the storage module 1130 after passing through the crushing module. However, depending on the size of the waste composite material and the size of the thermal decomposition reactor of the reaction unit 1200, the waste composite material can also be directly stored in the storage module without passing through the crushing module and then fed into the reaction unit.

[0056] The feeding module 1140 feeds the waste composite material into the reactor 1210 of the reaction unit 1200. In order to feed the crushed waste composite material, a single-screw feeder can be used. The feeding module 1140 can feed the waste composite material into the reactor 1210 either once or continuously.

[0057] On the other hand, it is necessary to lower the temperature of the waste composite material placed in the feeding module 1140. Cooling jackets can be arranged on the bottom and side surfaces of the feeding module 1140 to cool the waste composite material. The thermal decomposition reactor connected to the lower part of the feeding section is in a high-temperature state due to the high-temperature gas flowing inside. By arranging cooling jackets on the bottom and side surfaces of the feeding module 1140, it is possible to prevent the heat released from the thermal decomposition reactor from being transferred to the feeding module 1140, resulting in a fire of the waste blades located in the feeding module 1140 before being fed into the thermal decomposition reactor. The cooling jackets can receive cooling water from the cooling tower of the modification unit to lower the temperature of the waste composite material to be fed.

[0058] The reaction unit 1200 thermally decomposes the waste composite material. In order to thermally decompose the waste composite material, the thermal decomposition reactor 1210 of the reaction unit 1200 receives the waste composite material from the supply module 1100. The reaction unit 1200 includes one or more thermal decomposition reactors 1210, 1210'.

[0059] The thermal decomposition reactors 1210, 1210' are provided with a space for accommodating the waste composite material inside and are heated directly or indirectly by a burner. In the present invention, the waste composite material can be indirectly heated.

[0060] For example, the thermal decomposition reactors 1210, 1210' can include an outer shell and an inner shell. The high-temperature gas can flow into the outer shell. The high-temperature gas can be generated by a burner arranged outside the outer shell. The burner can burn the thermal decomposition gas and LNG / LPG to generate the combustion gas. The generated high-temperature combustion gas is supplied into the outer shell. The temperature of the combustion gas can be 400 - 500 °C.

[0061] The inner shell is accommodated within the outer shell and receives a supply of waste composite material from the waste composite material supply module. The waste composite material is thermally decomposed within the inner shell. When the waste composite material is thermally decomposed, flue gas can be injected into and discharged from the inner shell in order to maintain a reducing atmosphere. The inner shell can be cylindrical. A screw or the like for the movement and mixing of the waste composite material can also be disposed within the inner shell.

[0062] For effective thermal decomposition, it is necessary to uniformly mix the waste composite material with air. For the mixing of the waste composite material, the inner shell can be rotated or a screw or the like disposed within the inner shell can be rotated. The rotation speed of the inner shell or the screw can vary according to the target residence time of the waste composite material.

[0063] The smaller the diameter of the inner shell, the better the heat transfer efficiency. However, the problem is that if the diameter becomes smaller, the processing capacity also becomes smaller. In order to solve this problem and effectively transfer heat to the waste composite material, baffles can be disposed on the inner wall of the inner shell. A plurality of baffles can be disposed at intervals along the length direction and the circumferential direction on the inner wall of the inner shell. In the present embodiment, the thermal decomposition reactors 1210 and 1210' are illustratively described, but are not limited thereto, and thermal decomposition reactors of various shapes and capacities can be used.

[0064] On the other hand, the waste composite material introduced into the thermal decomposition reactor 1210 is thermally decomposed within the thermal decomposition reactor 1210. The thermal decomposition step can go through a first thermal decomposition step and a second thermal decomposition step. Through the first thermal decomposition, resins such as epoxy resin and wood contained in the waste composite material are gasified. Through the second thermal decomposition, the resins and charred substances remaining in the carbon fiber and glass fiber blocks are decomposed.

[0065] The first thermal decomposition and the second thermal decomposition can be carried out in one thermal decomposition reactor or two or more thermal decomposition reactors. The first thermal decomposition reactor and the second thermal decomposition reactor can be reactors of the same form, but reactors of different forms can also be used. For example, the first thermal decomposition reactor can be a rotary kiln and the second thermal decomposition reactor can be a screw type. The internal temperature of the first and second thermal decomposition reactors 1210 and 1210' can be 400 to 500 °C.

[0066] In one embodiment, the first thermal decomposition and the second thermal decomposition can be carried out in a thermal decomposition reactor 1210. At this time, the thermal decomposition reactor 1210 can be a batch-type thermal decomposition reactor. A specified amount of waste composite material is input into the thermal decomposition reactor 1210, and the first thermal decomposition and the second thermal decomposition are sequentially carried out in the thermal decomposition reactor 1210. After the first thermal decomposition, impurities such as charred materials can be screened, and then the second thermal decomposition is carried out in the thermal decomposition reactor 1210. During the first thermal decomposition, the burner can receive the thermal decomposition gas and LNG or LPG from the fuel tank, and during the second thermal decomposition, the burner can receive the combustion gas from the first thermal decomposition reactor.

[0067] In another embodiment, two thermal decomposition reactors 1210 and 1210' can be continuously arranged to separately carry out the first thermal decomposition and the second thermal decomposition. At this time, each of the thermal decomposition reactors 1210 and 1210' can be a batch-type thermal decomposition reactor. The first thermal decomposition is carried out in the first thermal decomposition reactor 1210, and the second thermal decomposition is carried out in the second thermal decomposition reactor 1210'. A specified amount of waste composite material is input into the first thermal decomposition reactor 1210 and the first thermal decomposition is carried out. When the first thermal decomposition is completed, impurities such as charred materials are screened from the products of the first thermal decomposition, and then they are moved to the second thermal decomposition reactor. The second thermal decomposition is carried out in the second thermal decomposition reactor 1210'. During the first thermal decomposition, the burner can receive the thermal decomposition gas and LNG or LPG from the fuel tank, and during the second thermal decomposition, the burner can receive the combustion gas from the first thermal decomposition reactor.

[0068] In another embodiment, two thermal decomposition reactors 1210 and 1210' can be continuously arranged to separately carry out the first thermal decomposition and the second thermal decomposition, and each of the thermal decomposition reactors 1210 and 1210' can be a continuous-type thermal decomposition reactor. The waste composite material is continuously input into the first thermal decomposition reactor 1210 in a specified amount each time to carry out the first thermal decomposition. After the first thermal decomposition products discharged from the first thermal decomposition reactor 1210 are screened for impurities such as charred materials, they are continuously input into the second thermal decomposition reactor 1210'. The second thermal decomposition is carried out in the second thermal decomposition reactor 1210' so that the resin and charred materials remaining in the carbon fiber and glass fiber are decomposed.

[0069] In another embodiment, considering the residence time of the waste composite material in the reactor, the size of the input waste composite material, etc., more than two first thermal decomposition reactors 1210 can be connected for use. For example, in order to ensure the residence time during the first thermal decomposition, the reaction unit 1200 can also include two first thermal decomposition reactors 1210 and 1210 and one second thermal decomposition reactor 1210'.

[0070] The first pyrolysis reactor 1210 and the second pyrolysis reactor 1210' can be connected horizontally or vertically. As Figure 3 shown, when multiple pyrolysis reactors 1210, 1210' are connected vertically, the advantage is that the size of the entire device can be reduced and the design freedom can be improved.

[0071] The oxygen concentration in the first pyrolysis reactor 1210 during the first pyrolysis should be maintained below 10%. A sensor can be arranged inside the first pyrolysis reactor 1210 to continuously measure the oxygen concentration. In another embodiment, a sensor can also be arranged in the discharge line to measure the oxygen concentration in the discharged gas.

[0072] The residence time of the waste composite material debris in the first pyrolysis reactor 1210 during the first pyrolysis can be below 9 hours. If the residence time is above 9 hours, the reactants may be over-carbonized. The temperature inside the first pyrolysis reactor 1210 can be 400 - 500 °C. The heat source for the first pyrolysis can be pyrolysis gas and LNG / LPG.

[0073] After the first pyrolysis, resins such as epoxy resin and wood contained in the waste composite material are vaporized in the first pyrolysis reactor 1210, leaving carbon fiber and glass fiber blocks. At this time, the resin that has not been vaporized in time is carbonized (charred material, char) and remains on the surface of the carbon fiber and glass fiber.

[0074] As the products of the first pyrolysis process, in addition to gas and charred material (Char), oil mist is also generated. The oil mist is cooled during the process of passing through the modification unit 1400 described below, so that part of it can be extracted as gas and part of it can be extracted as oil. The oil mist can be cooled by water. The gas generated from the oil mist has calorific value and can flow to the gas tank of the heat supply unit 1300 to be used as the indirect heat source for the second pyrolysis.

[0075] Part of the charred material remaining on the carbon fiber and glass fiber blocks can be removed by screening. The products of the first pyrolysis discharged from the first pyrolysis reactor 1210 can be screened before the second pyrolysis. The carbon fiber and glass fiber are separated from part of the charred material by screening. As the sieve for separating the charred material, for example, a sieve with a mesh diameter of 50 mm or less can be used.

[0076] The second thermal decomposition can be carried out in a second thermal decomposition reactor. The second thermal decomposition is a combustion reaction. The carbon fiber and glass fiber blocks after removing a part of the char are moved to the second thermal decomposition reactor 1210'. In this step, the carbon fiber and glass fiber may have char adhering between the fibers. During the second thermal decomposition, the combustion gas containing about 10% oxygen causes the residual epoxy resin and char to burn. Through the second thermal decomposition process, i.e., the combustion process, the residual epoxy resin and char are removed, leaving only carbon fiber and glass fiber.

[0077] The heat source for the second thermal decomposition can be combustion gas. The temperature of the combustion gas injected into the second thermal decomposition reactor 1210' can be 500 - 600 °C, preferably 500 °C. The oxygen concentration in the combustion gas can be approximately 10%. Through the combustion reaction in the second thermal decomposition reactor, the resin and char remaining in the carbon fiber and glass fiber blocks are decomposed.

[0078] A part of the exhaust gas discharged from the second thermal decomposition reactor 1210' can supply hot air to the storage module 1130 through the heat exchanger of the heat supply unit 1300. Thus, the moisture of the crushed waste composite material can be reduced.

[0079] The residence time of the carbon fiber and glass fiber blocks in the second thermal decomposition reactor 1210' can be 3 hours or less. At this time, if the oxygen concentration in the second thermal decomposition reactor 1210' is high, oxidation of the heating object may occur, so the oxygen concentration is maintained below 10%.

[0080] The oxygen concentration in the second thermal decomposition reactor 1210' can be adjusted by a blower fan and a stirrer (not shown).

[0081] Outside air can be introduced into the second thermal decomposition reactor 1210' through a blower fan. The stirrer can mix 70% - 80% of the combustion gas and 20% - 30% of the outside air to control the oxygen concentration below 10%. For this purpose, multiple sensors are installed in the second thermal decomposition reactor 1210' to continuously detect the oxygen concentration. When the oxygen concentration exceeds 15%, the mixing ratio of the combustion gas can be increased, and when the oxygen concentration is less than 7%, the mixing ratio of the outside air can be increased to adjust the oxygen concentration. In this embodiment, although sensors are configured in the second thermal decomposition reactor 1210', in other embodiments, sensors can also be configured in the discharge line to measure the oxygen concentration in the discharged gas.

[0082] After the second thermal decomposition, high-purity carbon fiber and glass fiber are left.

[0083] As Figure 4As shown, the heat supply unit 1300 may include a burner 1310, a heat exchanger 1320, a blower 1330, a scrubber 1340, and a chimney 1350. The burner 1310 supplies the thermal energy required for the thermal decomposition reaction to the thermal decomposition reactor 1210.

[0084] The thermal energy required for the first thermal decomposition reaction can be supplied by the first burner. The first burner heats the first thermal decomposition reactor 1210 in an indirect heating manner, causing heat to transfer to the inside of the reactor 1210. The heat source of the first burner can be thermal decomposition gas and LNG / LPG. The gas tank supplies thermal decomposition gas and LNG / LPG to the first burner. LNG / LPG can be used as an auxiliary heat source. The temperature can be finely adjusted by LNG / LPG.

[0085] Through the first thermal decomposition, resins such as epoxy resin and wood contained in the waste composite material are gasified, and the thermal decomposition gas is discharged. After the first thermal decomposition, the carbon fiber and glass fiber blocks become a caked state together with a part of the undecomposed resin and charred matter.

[0086] The thermal energy required for the second thermal decomposition reaction can be supplied by the second burner. The heat source of the second burner can be combustion gas. Through the second thermal decomposition, a part of the undecomposed resin and charred matter burns, leaving carbon fiber and glass fiber.

[0087] When the first thermal decomposition and the second thermal decomposition are carried out in one reactor, the first burner and the second burner are not independent burners, but can be a single burner 1310. In this case, thermal decomposition gas and LNG / LPG can be supplied as the fuel during the first thermal decomposition, and combustion gas can be supplied as the fuel during the second thermal decomposition.

[0088] The heat exchanger 1320 receives heat from the first thermal decomposition reactor 1210 and supplies hot air to the storage module 1130. The crushed waste composite material is accommodated in the storage module 1130. Since the crushed waste composite material contains moisture, the moisture contained in the blades is reduced by hot air. Through the hot air, the amount of moisture in the waste composite material can be reduced to less than 10% of the total weight of the input waste composite material. The heat exchanger 1320 can be a shell-and-tube heat exchanger.

[0089] The blower 1330 sucks the thermal decomposition gas from the heat exchanger 1320 and makes it flow towards the scrubber. If the gas discharged from the thermal decomposition reactor 1210 directly flows into the scrubber, the liquid contained in the scrubber will be evaporated. To prevent this, the exhaust gas discharged from the thermal decomposition reactor 1210 is cooled to about 200 - 300 °C by the heat exchanger 1320 and then flows into the scrubber.

[0090] The scrubber 1340 treats the exhaust gas. As the scrubber 1340, a dust collection device using an aqueous NaOH solution can be used. By washing with the aqueous NaOH solution, SOx / NOx, etc. in the combustion gas can be controlled. In this embodiment, a clean dust collection device using an aqueous NaOH solution is used, but it is not limited thereto, and scrubbers such as a filtration method or an electrostatic method can also be used.

[0091] The chimney 1350 finally discharges the exhaust gas and by-products. As a structure for finally discharging air pollutants, in the event of an emergency such as detecting a specified amount or more of air pollutants, the air pollutants can be emergently controlled by igniting the flare chimney.

[0092] The chimney 1350 discharges the combustion gas discharged from the first pyrolysis reactor and the second pyrolysis reactors 1210, 1210' to the outside of the device.

[0093] In the present invention, the waste composite material can perform the separation of carbon fiber and glass fiber from crushing to pyrolysis in one process, and is moved to each unit by a conveyor. One or more conveyors can be connected to adjust the residence time in each unit.

[0094] As Figure 5 shown, the modification unit 1400 can include a catalyst tower 1410, a heat exchanger 1420, a separation tank 1430, a cleaning tank 1440, and a pressure control tank 1450. The modification unit 1400 converts the pyrolysis gas into oil. Approximately 30% of the entire pyrolysis gas can be converted into pyrolysis oil. Thereby, the amount of fuel required for heating the pyrolysis reactor can be saved.

[0095] Modification is to shorten the high-molecular hydrocarbon, which is performed using a catalyst tower in this embodiment. Modification using a catalyst can reduce the energy requirement for the process and optimize the entire process.

[0096] The catalyst tower 1410 can be in a form in which a plurality of catalyst layers are stacked. Each catalyst layer is provided with a catalyst material. As the catalyst, various catalysts such as FCC, spent FCC, HZSM-5, ZSM-5, Cu-Al2O3, Co-Mo / z, Zeolite-β, natural zeolite (NZ), red mud, Al(OH)3Ca(OH)2, and FeO3 can be used. In this embodiment, a zeolite series commercial catalyst such as ZSM-5 is used, but it is not limited thereto. By using a catalyst tower in a multi-layer form, the residence time of the pyrolysis gas can be ensured.

[0097] During the process where the pyrolysis gas flows into the lower part of the catalyst tower 1410 and flows upward, it is modified. The zeolite has many small pores, and the hydrocarbon chains of the oil mist contained in the pyrolysis gas are broken during the passage of the zeolite. The high-molecular hydrocarbons are converted into low-molecular hydrocarbons by the zeolite catalyst.

[0098] The heat exchanger 1420 cools the pyrolysis gas that has passed through the catalyst tower 1410 to atomize the oil mist. Water can be used as the medium for heat exchange. The heat exchanger 1420 is a shell-and-tube type and can have a three-stage structure, but it is not limited thereto, and various forms of heat exchangers can be used.

[0099] The separation tank 1430 separates the condensed pyrolysis gas into gas and oil. The cooled pyrolysis gas moves to the separation tank 1430. The pyrolysis gas in a gaseous state is discharged from the upper part of the separation tank 1430, and the oil condenses and is discharged from the lower part of the separation tank 1430. The condensed oil can be stored in the pyrolysis oil storage tank 1460. The oil stored in the pyrolysis oil storage tank 1460 can be subjected to post-treatment such as distillation.

[0100] The cleaning tank 1440 removes foreign substances in the pyrolysis gas in a gaseous state. The pyrolysis gas discharged from the upper part of the separation tank 1430 flows into the cleaning tank 1440. The cleaning tank 1440 neutralizes the pyrolysis gas to reduce the amount of hydrogen chloride (HCl) in the pyrolysis gas. The cleaning tank 1440 contains an aqueous solution of sodium hydroxide (NaOH), and the pyrolysis gas is dehydrochlorinated during the process of passing through the aqueous solution of sodium hydroxide. The neutralized pyrolysis gas flows to the pressure control tank 1450.

[0101] In this embodiment, one cleaning tank 1440 is provided, but in another embodiment, another cleaning tank may also be provided. When all the pyrolysis oil droplets cannot be removed by the first cleaning, another cleaning tank can be configured. By removing the remaining pyrolysis oil droplets through the additional cleaning tank, the purity of the pyrolysis gas can be further improved.

[0102] The pressure control tank 1450 is configured to prevent the reflux of the pyrolysis gas before the pyrolysis gas is supplied to the burner 1310. Inside the pressure control tank 1450, an aqueous solution that does not react with the pyrolysis gas is contained at a specified height, and the pyrolysis gas flows into the aqueous solution. The pyrolysis gas is discharged from the discharge port at the upper end of the pressure control tank 1450. The pyrolysis gas discharged from the pressure control tank 1450 can be supplied to the burner 1310.

[0103] The modified pyrolysis gas is used again as fuel for heating the reactor 1210. By using the pyrolysis gas as fuel again, the overall fuel consumption can be reduced, and pollutant emissions can be decreased. When the pyrolysis gas is not used according to the operation policy of the device, the cleaning tank 1440 and the pressure control tank 1450 are in a disconnected state, and the pyrolysis gas is discharged through the scrubber 1340 and the chimney 1350. Alternatively, the pyrolysis gas that has passed through the cleaning tank 1440 and the pressure control tank 1450 can be discharged through the chimney 1350.

[0104] As Figure 6 shown, the separation unit 1500 may include a washing unit 1510, a separation unit 1520, a first chamber 1530, a second chamber 1540, carding modules 1531, 1541, and granulation modules 1532, 1542. The washing unit 1510 receives the secondary pyrolysis products and washes them in such a way that only the lumps of carbon fiber and glass fiber remain. First, the secondary pyrolysis products are screened to remove ash with a size of 20 mm or less. The filtered ash is stored in the ash storage chamber. The ash is in a very high temperature state, and a cooling jacket can be arranged at the lower end of the ash storage chamber. The cooling jacket can receive cold water from the cooling tower of the modification unit 1400 to reduce the temperature of the ash contained in the ash storage chamber.

[0105] The lumps of carbon fiber and glass fiber after washing to remove ash. The washing can use a wet washing method.

[0106] The separation unit 1520 can separate the secondary pyrolysis products into a first substance and a second substance. The first substance can be r-CF (reused carbon fiber), and the second substance can be r-GF (reused glass fiber). r-CF and r-GF can be separated using the density difference. As a method using the density difference, there are a dry method and a wet method. The dry method utilizes the flow of air to cause the flow of air to the secondary pyrolysis products moving on the conveyor to move the light carbon fiber.

[0107] The wet method is a method of separating carbon fiber and glass fiber using a liquid with a density between the densities of carbon fiber and glass fiber.

[0108] The carbon fiber and glass fiber separated by the separation unit 1520 can move to the first chamber 1530 and the second chamber 1540 respectively. The separation operation of carbon fiber and glass fiber can be carried out on the conveyor.

[0109] The carbon fiber and glass fiber stored in the first chamber 1530 and the second chamber 1540 respectively can be post-processed for factory shipment.

[0110] The carding modules 1531 and 1541 card r-CF and r-GF with a specified length. The lengths of r-CF and r-GF after resin removal are 50 mm or less. Since the fiber lengths of r-CF and r-GF are short, carding is performed for post-treatment. Through the carding operation, the fibers become directional and longer. The carded r-CF and r-GF are pressed to be processed into non-woven fabrics. When the lengths of r-CF and r-GF are 5 mm or less, it is difficult to perform carding. r-CF and r-GF with lengths of 5 mm or less are not fed into the carding modules 1531 and 1541. Before the recycled r-CF and r-GF are fed into the carding modules 1531 and 1541, r-CF and r-GF with lengths of 5 mm or less can be separated using a sieve or the like.

[0111] The pelletizing modules 1532 and 1542 melt and mix the recycled r-CF, r-GF, and resin to form pellets. The pelletizing modules 1532 and 1542 cut the non-woven fabric generated by the carding module into a specified size and mix it with the molten resin. The r-CF and r-GF non-woven fabric whose structure has hardened through pressing is cured together with the resin and shipped out.

[0112] On the other hand, r-CF and r-GF with lengths of 5 mm or less do not flow into the carding modules 1531 and 1541 but directly flow into the pelletizing modules 1532 and 1542 respectively. r-CF and r-GF with lengths of 5 mm or less are directly mixed with the resin and pelletized.

[0113] The pelletizing modules 1532 and 1542 can mix the carded r-CF, r-GF, short fibers of r-CF and r-GF with lengths of 5 mm or less, and the existing resin and generate pelletized products according to the user's requirements. The control unit (not shown) can receive the size of the waste composite material particles fed into the pyrolysis reactor from the waste composite material supply module 1100 and determine whether the carbon fiber and glass fiber stored in the first chamber 1530 and the second chamber 1540 move to the pelletizing modules 1532 and 1542 through the carding modules 1531 and 1541 or directly move to the pelletizing modules 1532 and 1542.

[0114] As another embodiment, when the waste composite material is fed into the pyrolysis reactor without being crushed, the carbon fiber and glass fiber can also be controlled to move to the pelletizing modules 1532 and 1542 through the carding modules 1531 and 1541. If the size of the waste composite material particles fed into the pyrolysis reactor is small, the carbon fiber and glass fiber can directly move to the pelletizing modules 1532 and 1542.

[0115] The size of the shredded waste composite material can also be adjusted during the shredding step according to the user's requirements. For example, when directly granulating without forming non-woven fabric is required, the waste composite material can be shredded to less than 5 mm.

[0116] Figure 7 is a flowchart showing a method for recycling carbon fiber and glass fiber according to an embodiment of the present invention, Figure 8 is a diagram schematically showing a carbon fiber and glass fiber recycling device according to an embodiment of the present invention.

[0117] According to the present invention, in order to separate waste composite materials, such as Figure 7 shown, the waste composite material is shredded and stored (S1100). The waste composite material cut to a length of less than 10 m is shredded so that the thickness becomes less than 20 mm. The waste composite material can be put into the shredding module 1110 for shredding.

[0118] On the other hand, the shredding module 1110 can adjust the shredding size of the waste composite material when necessary. The shredding size of the waste composite material can be adjusted according to the target state of the waste composite material and the final product. When long fibers can be recycled, the shredding size of the waste blade can be increased.

[0119] A large amount of dust is generated during the shredding process of the waste composite material. In order not to let the dust leak outside the shredding module 1110, the input part of the shredding module 1110 can be sealed. In addition, the dust generated during the shredding process of the waste composite material can be sucked in by the dust suction part and trapped in a specified space. In order to trap the dust, the air can be continuously circulated inside the shredding module 1110.

[0120] After the waste composite material is shredded, the shredded waste composite material can be screened to remove particles below a specified particle size. The particle sizes of the shredded waste composite materials are different. When all the waste composite materials with different particle sizes are thermally decomposed in the thermal decomposition reactor 1210, there is a concern that the small-sized blade fragments are carbonized, contaminating the first thermal decomposition product. For this reason, the shredded blades can be moved on a sieve, and when the size of the shredded particles is below the specified size, they can be separated below the sieve. Vibration can also be applied to the sieve to facilitate the separation of smaller particles.

[0121] The shredded waste composite material is conveyed to the storage module 1130. The storage module 1130 stores the waste composite material for a specified time before it is put into the reactor. As Figure 8 shown, the storage module 1130 receives the supply of hot air from the heat exchanger 1320. In order to reduce the water vapor generated during the thermal decomposition of the waste composite material, hot air can be supplied to the storage module to dry the stored waste composite material.

[0122] Then, the waste composite material stored in the storage module 1130 is put into the pyrolysis reactor 1210 (S1200). The input of the waste composite material can be carried out once or continuously. In order to input the crushed waste composite material, a single-screw feeder can be used. On the other hand, the stored waste composite material is in a high-temperature state due to hot air. Therefore, the temperature difference with the reaction unit is very large, so it is necessary to reduce the temperature of the waste composite material before input. Cooling jackets can be arranged on the bottom surface and side surface of the input module to cool the input waste composite material. The cooling jacket can receive cold water from the cooling tower of the modification unit 1400 to reduce the temperature of the ash stored in the ash storage chamber.

[0123] In order to minimize the inflow of oxygen into the pyrolysis reactor 1210 when inputting the waste composite material, the input part of the pyrolysis reactor 1210 can have a double-valve structure. The upper end of the input part is open, the first valve is provided on the upstream side of the channel, and the second valve is provided on the downstream side of the channel. The first valve is arranged on the upstream side of the channel, and the second valve is arranged on the downstream side of the channel.

[0124] The first valve and the second valve are controlled to be opened sequentially rather than simultaneously. The first valve and the second valve can be opened in a sliding manner, and the opening degree can be adjusted according to the amount to be input. By opening the multiple valves respectively, the desired amount of crushed waste composite material can be input into the interior of the pyrolysis reactor 1210.

[0125] The first valve can be opened in a state where the second valve is closed. After opening the first valve and inputting a specified amount of crushed waste composite material and then closing the first valve to seal the input part, the second valve is opened. While opening the second valve, flue gas can be injected through the gas inlet. During the opening of the second valve, flue gas is supplied into the channel of the input part, and when the second valve is closed again, the flue gas is discharged through the gas outlet. Through the opening of the second valve, the waste composite material is input into the pyrolysis reactor 1210.

[0126] The waste composite material is subjected to the first pyrolysis (S1300). Through the first pyrolysis, resins such as epoxy resin and wood contained in the waste composite material are gasified.

[0127] The heat supply unit 1300 heats the first pyrolysis reactor 1210 in an indirect heating form. The heat energy required for the first pyrolysis reaction can be supplied by the first burner. The heat source of the first burner can be pyrolysis gas and LNG or LPG. The temperature in the first pyrolysis reactor 1210 can be 400 - 500 °C.

[0128] During the first thermal decomposition, the oxygen concentration in the first thermal decomposition reactor 1210 can be maintained at 10% or less. The residence time of the waste composite material fragments in the first thermal decomposition reactor can be 9 hours or less.

[0129] The fragmented blades after the first thermal decomposition are subjected to a second thermal decomposition (S1400). The carbon fiber and glass fiber blocks containing charred materials are secondarily thermally decomposed in the second thermal decomposition reactor.

[0130] After the first thermal decomposition, resins such as epoxy resin and wood contained in the waste composite material are gasified, but the resins that have not had time to be gasified are carbonized (charred materials, char) and remain on the surface of the carbon fiber and glass fiber. Through the second thermal decomposition, the resins and charred materials remaining on the carbon fiber and glass fiber blocks are decomposed.

[0131] The heat supply unit 1300 heats the second thermal decomposition reactor 1210' in an indirect heating manner. The heat source for the second thermal decomposition can be combustion gas. The temperature of the combustion gas injected into the second thermal decomposition reactor 1210' can be 500 - 600°C.

[0132] The residence time of the carbon fiber and glass fiber blocks in the second thermal decomposition reactor 1210' can be 3 hours or less. The oxygen concentration in the second thermal decomposition reactor 1210' can be 10% or less.

[0133] The first thermal decomposition and the second thermal decomposition can be carried out in one thermal decomposition reactor or two or more thermal decomposition reactors. The first thermal decomposition reactor and the second thermal decomposition reactor can be reactors of the same type, but reactors of different types can also be used. For example, the first thermal decomposition reactor can be a rotary kiln, and the second thermal decomposition reactor can be a screw type. The internal temperature of the first and second thermal decomposition reactors 1210, 1210' can be 400 - 500°C.

[0134] In one embodiment, the first thermal decomposition and the second thermal decomposition can be carried out in one thermal decomposition reactor 1210. At this time, the thermal decomposition reactor 1210 can be a batch-type thermal decomposition reactor. A specified amount of waste composite material is input into the thermal decomposition reactor 1210, and the first thermal decomposition and the second thermal decomposition are carried out sequentially in the thermal decomposition reactor 1210. Impurities such as charred materials can be screened after the first thermal decomposition, and then the second thermal decomposition is carried out in the thermal decomposition reactor 1210. During the first thermal decomposition, the burner can receive thermal decomposition gas and LNG / LPG from the fuel tank, and during the second thermal decomposition, the burner can receive combustion gas from the first thermal decomposition reactor.

[0135] In another embodiment, two thermal decomposition reactors 1210 and 1210' can be continuously configured to perform the first thermal decomposition and the second thermal decomposition separately. At this time, each of the thermal decomposition reactors 1210 and 1210' can be a batch-type thermal decomposition reactor. The first thermal decomposition is performed in the first thermal decomposition reactor 1210, and the second thermal decomposition is performed in the second thermal decomposition reactor 1210'. A specified amount of waste composite material is input into the first thermal decomposition reactor 1210 for the first thermal decomposition. When the first thermal decomposition ends, the first thermal decomposition product is screened for impurities such as charred substances and then moved to the second thermal decomposition reactor. The second thermal decomposition is performed in the second thermal decomposition reactor 1210'. During the first thermal decomposition, the burner can receive the thermal decomposition gas and LNG / LPG from the fuel tank. During the second thermal decomposition, the burner can receive the combustion gas from the first thermal decomposition reactor.

[0136] In another embodiment, two thermal decomposition reactors 1210 and 1210' can be continuously configured to perform the first thermal decomposition and the second thermal decomposition separately, and each of the thermal decomposition reactors 1210 and 1210' can be a continuous-type thermal decomposition reactor. The waste composite material is continuously input into the first thermal decomposition reactor 1210 in a specified amount each time for the first thermal decomposition. The first thermal decomposition product discharged from the first thermal decomposition reactor 1210 is screened for impurities such as charred substances during the process of being transported to the first thermal decomposition reactor 1210', and then continuously input into the second thermal decomposition reactor 1210'. The second thermal decomposition is performed in the second thermal decomposition reactor 1210', and the resin and charred substances remaining in the carbon fiber and glass fiber blocks are decomposed.

[0137] In another embodiment, considering the residence time of the waste composite material in the reactor, the size of the input waste composite material, etc., two or more first thermal decomposition reactors 1210 can be connected for use. For example, in order to ensure the residence time during the first thermal decomposition, the reaction unit 1200 can also include two first thermal decomposition reactors 1210 and 1210 and one second thermal decomposition reactor 1210'.

[0138] Oil is extracted from the thermal decomposition gas (S1500). The modification unit 1400 can convert the thermal decomposition gas into oil. In order to modify the thermal decomposition gas, a zeolite series catalyst can be used. The thermal decomposition gas flows in from the lower part of the catalyst tower 1410 and flows upward, and is modified during this process. The zeolite is formed with many small pores, and the hydrocarbon chains of the oil mist contained in the thermal decomposition gas are broken during the process of passing through the zeolite. The high-molecular hydrocarbons are converted into low-molecular hydrocarbons by the zeolite catalyst.

[0139] The heat exchanger 1420 cools the thermal decomposition gas after passing through the catalyst tower 1410 to atomize the oil mist. Water can be used as the medium for heat exchange.

[0140] The separation tank 1430 separates the condensed pyrolysis gas into gas and oil. The cooled pyrolysis gas moves to the separation tank 1430. The pyrolysis gas in gaseous state is discharged from the upper part of the separation tank 1430, and the oil condenses and is discharged from the lower part of the separation tank 1430. The condensed oil can be stored in the pyrolysis oil storage tank. The oil stored in the pyrolysis oil storage tank can be subjected to post-treatment such as distillation.

[0141] Through the modification unit 1400, about 30% of the entire pyrolysis gas can be converted into pyrolysis oil. Thereby, the amount of fuel required for heating the pyrolysis reactor can be saved.

[0142] Separate carbon fiber and glass fiber from the waste composite material after the second pyrolysis (S1600). The products of the second pyrolysis can be separated into r-CF (recycled carbon fiber) and r-GF (recycled glass fiber) by the separation unit 1600.

[0143] Specifically, screen the products of the second pyrolysis to remove the ash with a size of 20 mm or less. The filtered ash is stored in the ash storage chamber. Wash the blocks of carbon fiber and glass fiber after removing the ash. A wet washing method can be used for washing. The washed r-CF and r-GF can be separated using the density difference.

[0144] The carbon fiber and glass fiber separated by the separation section 1520 can move to the first chamber 1530 and the second chamber 1540 respectively. The carding modules 1531, 1541 card the r-CF and r-GF with a specified length respectively. The carded r-CF and r-GF are pressed and processed into non-woven fabrics. The granulation modules 1532, 1542 melt and mix the recycled r-CF, r-GF and resin to make granules. The granulation modules 1532, 1542 cut the non-woven fabrics generated by the carding modules 1531, 1541 into specified sizes and mix them with the molten resin. The r-CF and r-GF non-woven fabrics whose structure becomes hard through pressing can be cured together with the resin and shipped out.

[0145] The r-CF and r-GF with a length of 5 mm or less do not flow into the carding modules 1531, 1541, but directly flow into the granulation modules 1532, 1542 respectively. The r-CF and r-GF with a length of 5 mm or less are directly mixed with the resin to make granules.

[0146] The control unit receives the size of the waste composite material particles input into the pyrolysis reactor from the waste composite material supply module 1100, and determines whether the carbon fiber and glass fiber stored in the first chamber and the second chamber respectively move to the granulation module through the carding module or directly move to the granulation module. It is also possible to adjust the crushing size of the waste composite material in the crushing step according to user requirements.

[0147] The waste composite material of the present invention can be broken, pyrolyzed, and separated from carbon fiber and glass fiber in one process, and moved to each unit by a conveyor. One or more conveyors can be connected to adjust the residence time in each unit.

[0148] As mentioned above, an embodiment of the present invention has been described. However, those skilled in the art can make various modifications and changes to the present invention by adding, changing, deleting, or adding components within the scope not departing from the idea of the present invention described in the claims. This is also included in the scope of the present invention.

[0149] Description of Reference Numerals

[0150] 1000: Carbon fiber and glass fiber recovery device

[0151] 1100: Waste composite material supply unit 1110: Crushing module

[0152] 1120: Conveying module 1130: Storage module

[0153] 1140: Feeding module 1200: Reaction unit

[0154] 1210, 1210’: Pyrolysis reactor 1300: Heat supply unit

[0155] 1310: Burner 1320: Heat exchanger

[0156] 1330: Blower 1340: Scrubber

[0157] 1350: Chimney 1400: Modification unit

[0158] 1410: Catalyst tower 1420: Heat exchanger

[0159] 1430: Separation tank 1440: Cleaning tank

[0160] 1450: Pressure control tank 1500: Separation unit

[0161] 1510: Washing section 1520: Separation section

[0162] 1530: First chamber 1540: Second chamber

[0163] 1531, 1541: Carding module 1532, 1542: Granulation module.

Claims

1. A carbon fiber and glass fiber recycling device, characterized in that, It includes: A waste composite material supply unit, which has a crushing module for crushing waste composite materials and a storage module for storing the crushed waste composite materials; A reaction unit, which heats the waste composite materials supplied from the waste composite material supply unit; A heat supply unit, which provides heat to the reaction unit; A modification unit, which separates the pyrolysis gas discharged from the reaction unit into gas and oil; and A separation unit, which has a separation section for separating the products of the reaction unit into a first substance and a second substance, a first chamber for accommodating the first substance, and a second chamber for accommodating the second substance.

2. The carbon fiber and glass fiber recycling device according to claim 1, characterized in that, The reaction unit has one pyrolysis reactor, and The pyrolysis reactor is a batch pyrolysis reactor, The first pyrolysis and the second pyrolysis are carried out successively in the pyrolysis reactor.

3. The carbon fiber and glass fiber recycling device according to claim 1, characterized in that, The reaction unit has at least 2 pyrolysis reactors.

4. The carbon fiber and glass fiber recycling device according to claim 3, characterized in that, Multiple said pyrolysis reactors are batch pyrolysis reactors.

5. The carbon fiber and glass fiber recycling device according to claim 3, characterized in that, Multiple said pyrolysis reactors are continuous pyrolysis reactors.

6. The carbon fiber and glass fiber recycling device according to claim 1 or 2, characterized in that, The modification unit has a catalyst tower, a heat exchanger and a separation tank.

7. The carbon fiber and glass fiber recycling device according to claim 6, characterized in that, The modification unit also has a cleaning tank and a pressure control tank.

8. The carbon fiber and glass fiber recycling device according to claim 1, characterized in that, The separation unit also has: A first combing module for combing the first substance; A first granulation module for granulating the first substance; A second combing module for combing the second substance; and A second granulation module for granulating the second substance.

9. The carbon fiber and glass fiber recycling device according to claim 8, characterized in that, The separation unit respectively detects the lengths of the first substance and the second substance and introduces them into the first granulation module and the second granulation module respectively when the lengths of the first substance and the second substance are below 5 mm.

10. The carbon fiber and glass fiber recycling device according to claim 1, characterized in that, The heat supply unit has a burner, a heat exchanger, a blower, a scrubber and a chimney.

11. A method for recycling carbon fiber and glass fiber, characterized in that, It includes: A waste composite material supply step of supplying waste composite materials into the reactor; A first heating step of heating the waste composite materials for the first time; A second heating step of heating the waste composite materials after the first heating for the second time; An oil extraction step of extracting oil from the pyrolysis gas discharged from the first heating step; and A separation step of separating the products of the second heating step into a first substance and a second substance.

12. The carbon fiber and glass fiber recovery method according to claim 11, wherein the first heating step and the second heating step are sequentially carried out in a pyrolysis reactor.

13. The carbon fiber and glass fiber recovery method according to claim 11, wherein the first heating step is carried out in a first pyrolysis reactor, and the second heating step is carried out in a second pyrolysis reactor.

14. The carbon fiber and glass fiber recovery method according to claim 12 or 13, wherein the heat source in the first heating step is pyrolysis gas and LNG, or pyrolysis gas and LPG, and the heat source in the second heating step is combustion gas.

15. The carbon fiber and glass fiber recovery method according to claim 11, wherein in the oil extraction step, a zeolite series catalyst is used for the modification of pyrolysis gas.

16. The carbon fiber and glass fiber recovery method according to claim 11, wherein in the separation step, the first substance and the second substance are separated by density difference.

17. The carbon fiber and glass fiber recovery method according to claim 11, wherein in the separation step, the first substance and the second substance are respectively carded and granulated.

18. The carbon fiber and glass fiber recovery method according to claim 11, wherein in the separation step, the control unit detects the lengths of the first substance and the second substance, and when the lengths of the first substance and the second substance are 5 mm or less, they are directly granulated respectively.

19. The carbon fiber and glass fiber recovery method according to claim 11, wherein before the waste composite material supply step, it further includes: a step of crushing the waste composite material; and a step of drying the crushed waste composite material under hot air.

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