Waste carbon fiber composite pyrolyzing furnace

Abstract

The invention provides a waste carbon fiber composite material pyrolyzing furnace. The waste carbon fiber composite material pyrolyzing furnace comprises a pyrolyzing furnace body, a feeding system, a heating system and a gas flow distribution system, a furnace door is arranged on the front side of the pyrolyzing furnace body, a pyrolyzing cavity is formed in the pyrolyzing furnace body, and a heating system is arranged to heat the pyrolyzing cavity; the feeding system comprises an out-furnace feeding device, an in-furnace material receiving device, a feeding trolley and a material receiving groove, the out-furnace feeding device is arranged on the outer side of the furnace door, the feeding trolley is arranged on an out-furnace track of the out-furnace feeding device in a sliding mode, and the material receiving groove is formed in the feeding trolley and used for containing materials to be pyrolyzed; the gas flow distribution system comprises a gas flow distribution system and a flue gas discharge system, the gas flow distribution system is used for introducing gas into the pyrolyzing furnace body and enabling the introduced gas to perform internal circulation in the pyrolyzing furnace body, and the flue gas discharge system is arranged at the top end of the pyrolyzing furnace body and is used for discharging flue gas in the pyrolyzing furnace body. According to the feeding device, materials do not need to be fed step by step manually, and the efficiency is greatly improved in the feeding process.

Description

Technical Field

[0001] The present application relates to the technical field of waste material recycling and treatment, and in particular to a waste carbon fiber composite material pyrolysis furnace. Background Art

[0002] The recycling of waste carbon fiber composites is a major challenge in today's environmental protection and resource recovery fields. Carbon fiber composites have been widely used in aerospace, automobile manufacturing, wind power generation and other industries due to their excellent mechanical properties, light weight and high temperature tolerance. As the use of these materials increases, the problem of handling waste carbon fiber composites has become more serious. Traditional methods of waste material disposal, such as landfill and incineration, not only waste resources, but may also pollute the environment. For this reason, the development of technology that can efficiently recycle waste carbon fiber composites has become an urgent problem to be solved.

[0003] Pyrolysis is an important waste carbon fiber composite material recycling technology. By heating the waste carbon fiber composite material in a high-temperature oxygen-free environment, the resin matrix can be decomposed while retaining the structure of the carbon fiber, thereby recycling the carbon fiber. Most existing pyrolysis furnaces use a fixed furnace body. To ensure the pyrolysis effect, waste carbon fiber composite materials usually need to be crushed before entering the pyrolysis furnace for pyrolysis. Therefore, waste carbon fiber composite materials in larger blocks or shell forms cannot be directly fed into the pyrolysis furnace. This process increases the processing time of waste materials. In addition, the feeding method of the existing pyrolysis furnace is relatively cumbersome, and it is necessary to rely on manual labor to gradually feed the crushed waste carbon fiber composite materials into the pyrolysis furnace, resulting in inefficiency in the feeding process and inconvenience in operation.

[0004] Therefore, there is an urgent need for a waste carbon fiber composite material pyrolysis furnace that can efficiently, simply and flexibly feed the waste carbon fiber composite material into the pyrolysis furnace, thereby improving the processing efficiency of the waste carbon fiber composite material. Summary of the invention

[0005] The present application provides a waste carbon fiber composite material pyrolysis furnace, which is used to solve the problems of low feeding efficiency and only being able to effectively pyrolyze broken waste carbon fiber composite materials in the existing pyrolysis furnace during the pyrolysis treatment of waste carbon fiber composite materials.

[0006] The present application provides a waste carbon fiber composite material pyrolysis furnace, including a pyrolysis furnace body, a feeding system, a heating system and a gas flow distribution system; The front side of the pyrolysis furnace body is provided with a furnace door, a pyrolysis chamber is formed inside the pyrolysis furnace body, the pyrolysis furnace body is provided with the heating system for heating the pyrolysis chamber, and the heating system adopts an electric heating system; the feeding system comprises an external feeding device, an internal receiving device, a feeding trolley and a receiving trough, the external feeding device is arranged on the outside of the furnace door, the external feeding device comprises an external furnace track, the external furnace track is slidably provided with the feeding trolley, and the feeding trolley is provided with a material for placing the material to be pyrolyzed The material receiving trough of the material, the in-furnace material receiving device is fixedly installed at the bottom end of the pyrolysis chamber, and the in-furnace material receiving device is an in-furnace track arranged in parallel and capable of horizontally docking with the out-furnace track; the gas flow distribution system includes an airflow distribution system and a flue gas exhaust system, the airflow distribution system is used to introduce gas into the pyrolysis furnace body and make the introduced gas circulate internally in the pyrolysis furnace body, and the flue gas exhaust system is arranged at the top of the pyrolysis furnace body, and is used to discharge the flue gas in the pyrolysis furnace body.

[0007] In an optional embodiment, the air flow distribution system includes a gas inlet pipeline system consisting of an air distribution pipe and an upper air inlet pipe, and a circulation fan installed at the top of the pyrolysis furnace body to circulate the gas in the furnace; The air distribution duct is arranged at the bottom end of the furnace body of the pyrolysis furnace, and the pipe body of the air distribution duct for distributing air is distributed on the left and right sides and the rear side of the bottom end of the furnace, the air distribution duct is connected with an air distribution inlet duct, and the air distribution inlet duct passes through the rear side of the furnace body of the pyrolysis furnace, and air flow holes for blowing gas into the pyrolysis furnace are evenly opened along the axial direction of the tube on the air distribution duct, and the upper air inlet duct is located above the air distribution duct and is in the middle area in the height direction of the furnace body of the pyrolysis furnace, one end of the upper air inlet duct passes into the furnace body of the pyrolysis furnace, and the other end of the upper air inlet duct passes through the rear side of the furnace body of the pyrolysis furnace, and the upper air inlet duct and the air distribution inlet duct are used to be respectively connected to the air intake system for ventilating the furnace; The smoke exhaust system includes a smoke exhaust port opened at the top of the pyrolysis furnace body and a smoke exhaust pipe connected to the smoke exhaust port for smoke exhaust. A plurality of the smoke exhaust ports are evenly arranged on the top of the pyrolysis furnace body. The smoke exhaust ports are connected to the inside of the pyrolysis furnace body. The smoke exhaust pipe is connected to a smoke conveying pipe for collecting smoke. The circulating fan is an air suction fan, which is used to achieve circulating flow by sucking gas inside the pyrolysis furnace.

[0008] In an optional embodiment, the air flow distribution system also includes an air duct arranged in the pyrolysis furnace body, the air duct is located at the periphery of the pyrolysis chamber and is arranged along the length direction of the pyrolysis furnace body, an air duct baffle is arranged between the air duct and the pyrolysis chamber, the air duct baffle is the inner furnace wall structure of the pyrolysis furnace body, the air duct includes a top air duct located at the top of the furnace and side air ducts located on the left and right sides of the furnace, the top air duct is connected to the two side air ducts, the air intake end of the circulating fan is located in the top air duct, the air distribution pipe bodies on the left and right sides of the air distribution pipe are respectively located at the bottom ends of the two side air ducts, the lower part of the side air duct is close to the furnace side with a first air duct opening communicating with the pyrolysis chamber reserved, and the bottom end of the top air duct is reserved with a second air duct opening communicating with the pyrolysis chamber reserved.

[0009] In an optional embodiment, the external furnace track adopts an upper and lower double track structure, and the external furnace track includes an upper track and a lower track, and the upper track is located above the lower track and can move along the length direction on the lower track; The out-of-furnace feeding device also includes a track pulley and an upper track pushing device, the track pulley is installed at the front and rear position below the upper track, and is used to support and guide the upper track to slide on the lower track, the upper track is slidably arranged on the lower track through the track pulley, and a pulley mounting seat for mounting the track pulley is arranged below the upper track, the upper track pushing device is horizontally and laterally arranged on the lower track and located between the track pulleys at the front and rear positions, the output end of the upper track pushing device is connected to the pulley mounting seat in front, and the upper track can move forward and backward under the pushing action of the upper track pushing device.

[0010] In an optional embodiment, a monitoring system is further included, wherein the monitoring system is used to monitor the operating status of the pyrolysis furnace in real time, and the monitoring system includes a temperature sensor assembly, a pressure sensor assembly and an oxygen content sensor; The temperature sensor assembly includes a first temperature sensor for monitoring the temperature in the pyrolysis chamber and a second temperature sensor for monitoring the temperature of the emitted flue gas; the pressure sensor assembly includes a plurality of pressure sensors for monitoring the gas pressure in the pyrolysis chamber; the oxygen content sensor is used to detect the oxygen content in the emitted flue gas.

[0011] In an optional embodiment, the number of the first temperature sensors is at least two, which can respectively monitor the temperature at different height positions in the pyrolysis chamber, and the first temperature sensor is installed above and below the rear furnace wall of the pyrolysis furnace body, and the sensing end of the first temperature sensor is located in the pyrolysis chamber, and the second temperature sensor is arranged on the smoke exhaust duct; the pressure sensors are respectively arranged on the rear furnace wall of the pyrolysis furnace body and in front of the side furnace wall of the pyrolysis furnace body; the oxygen content sensor is arranged on the flue gas conveying duct near the smoke exhaust duct.

[0012] In an optional embodiment, the electric heating system used in the heating system is a plurality of finned electric heating tubes, and the finned electric heating tubes are arranged inside the air duct and connected to the temperature control device through a cable to provide a uniform heat source.

[0013] In an optional embodiment, four smoke exhaust ports are evenly arranged at the top of the pyrolysis furnace body, and the four smoke exhaust ports are distributed in a square and are arranged at the four corner areas of the top of the pyrolysis furnace body. The number of the circulating fans is two, and the two circulating fans are installed at the top of the pyrolysis furnace body with a front and rear interval. The number of the second air duct ports reserved at the bottom of the top air duct is two, and the two second air duct ports correspond to the positions of the two circulating fans, and the air intake ends of the two circulating fans are respectively located in the top air duct above the two second air duct ports.

[0014] In an optional embodiment, a heat-insulating layer cavity for filling with heat-insulating material is provided in the furnace wall of the pyrolysis furnace body, and the heat-insulating layer cavity is located at the periphery of the air duct and between the outer furnace wall of the pyrolysis furnace body and the channel wall of the air duct; the heat-insulating material filled in the heat-insulating layer cavity is an aluminum silicate needle-punched blanket.

[0015] Compared with the prior art, this application has the following beneficial effects: 1. The present application provides a waste carbon fiber composite material pyrolysis furnace, which is designed to optimize the feeding system so that the waste carbon fiber composite material can be directly fed into the pyrolysis furnace without first being crushed. Specifically, the feeding device outside the furnace and the feeding vehicle are connected to the receiving device inside the furnace through the connection between the external furnace track and the internal furnace track, so that the waste materials can be easily fed from outside the furnace into the furnace. This design eliminates the complicated crushing steps in traditional technology and simplifies the feeding process. Moreover, since there is no need to rely on manual step-by-step feeding of materials, the feeding process has been greatly improved in efficiency, the operation has become simpler, the feeding efficiency has been significantly improved, and time and labor costs have been saved.

[0016] 2. The feeding device of the present application has stronger adaptability and can handle waste carbon fiber composite materials of different shapes and volumes. In traditional pyrolysis furnaces, waste materials need to be crushed first, and the design of the present application enables the waste materials to be directly fed into the pyrolysis furnace in larger blocks or shells through a feeding cart. This is due to the setting of the feeding device and feeding cart outside the furnace, which can adapt to waste of different volumes and shapes. Through such a design, the pyrolysis furnace of the present application can not only handle conventional crushed waste carbon fiber composite materials, but also effectively handle larger block or shell-shaped waste carbon fiber composite materials, thereby improving the versatility and flexibility of the pyrolysis furnace and expanding the scope of application.

[0017] 3. The present application adopts a gas flow distribution system, including an airflow distribution system and a flue gas exhaust system, which can greatly improve the uniformity of airflow during the pyrolysis process, thereby improving the pyrolysis efficiency. The application of the airflow distribution system can make the gas circulate evenly in the furnace, avoiding the problem of local overheating that may occur in traditional technologies. The uniform heat distribution not only helps to completely decompose the resin matrix, but also effectively protects the structure of the carbon fiber, avoiding oxidation or damage to the carbon fiber due to excessive temperature. In addition, the flue gas exhaust system is arranged at the top of the pyrolysis furnace body, and can be used to discharge the flue gas in the pyrolysis furnace body to facilitate the subsequent further treatment of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a waste carbon fiber composite material pyrolysis furnace provided in one embodiment of the present application; Figure 2 A three-dimensional schematic diagram of a waste carbon fiber composite material pyrolysis furnace provided in one embodiment of the present application; Figure 3 A three-dimensional schematic diagram of a waste carbon fiber composite material pyrolysis furnace provided in an embodiment of the present application from another angle; Figure 4 A schematic diagram of the structure of a pyrolysis furnace body provided in one embodiment of the present application; Figure 5 A schematic diagram of the arrangement of a monitoring system provided in an embodiment of the present application on a pyrolysis furnace body; Figure 6 A schematic diagram of an air duct and airflow circulation direction provided in an embodiment of the present application; Figure 7A schematic diagram of the arrangement of a heating system in an air duct provided in an embodiment of the present application; Figure 8 A schematic diagram of an air distribution duct and an upper air inlet duct provided in an embodiment of the present application; Fig. 9 A schematic diagram of the structure of an air duct baffle provided in one embodiment of the present application.

[0020] Description of reference numerals: 100-pyrolysis furnace body; 110-furnace door; 120-pyrolysis chamber; 130-insulation layer chamber; 131-insulation material; 200-feeding system; 210-furnace feeding device outside the furnace; 211-furnace track outside the furnace; 2111-upper track; 2112-lower track; 212-track pulley; 2121-pulley mounting seat; 213-upper track pushing device; 220-furnace receiving device; 230-feeding car; 240-receiving trough; 300-heating system; 410-air flow distribution system; 411-air distribution duct; 4111-air distribution inlet Air duct; 4112-air flow hole; 412-upper air inlet pipe; 413-circulating fan; 414-air duct; 4141-top air duct; 4142-side air duct; 41411-second air duct opening; 41421-first air duct opening; 420-smoke exhaust system; 421-smoke exhaust port; 422-smoke exhaust pipe; 4221-smoke delivery pipe; 500-air duct baffle; 600-temperature sensor assembly; 610-first temperature sensor; 620-second temperature sensor; 700-pressure sensor assembly; 800-oxygen content sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] Figure 1 This is a schematic diagram of the overall structure of a waste carbon fiber composite material pyrolysis furnace provided in one embodiment of the present application; Figure 2 A three-dimensional schematic diagram of a waste carbon fiber composite material pyrolysis furnace provided in one embodiment of the present application; Figure 3 A three-dimensional schematic diagram of a waste carbon fiber composite material pyrolysis furnace provided in an embodiment of the present application from another angle; Figure 4 A schematic diagram of the structure of a pyrolysis furnace body provided in one embodiment of the present application; Figure 5 A schematic diagram of the arrangement of a monitoring system provided in an embodiment of the present application on a pyrolysis furnace body; Figure 6 A schematic diagram of an air duct and airflow circulation direction provided in an embodiment of the present application; Figure 7 A schematic diagram of the arrangement of a heating system in an air duct provided in an embodiment of the present application; Figure 8 A schematic diagram of an air distribution duct and an upper air inlet duct provided in an embodiment of the present application; Fig. 9 This is a schematic diagram of the structure of the air duct baffle provided in one embodiment of the present application. Figure 1-Figure 9 The embodiment of the present application provides a waste carbon fiber composite material pyrolysis furnace, including a pyrolysis furnace body 100, a feeding system 200, a heating system 300 and a gas flow distribution system.

[0026] Among them, a furnace door 110 is arranged on the front side of the pyrolysis furnace body 100, a pyrolysis chamber 120 is formed inside the pyrolysis furnace body 100, and a heating system 300 for heating the pyrolysis chamber 120 is arranged inside the pyrolysis furnace body 100, and the heating system 300 adopts an electric heating system; the feeding system 200 includes an external feeding device 210, an internal receiving device 220, a feeding trolley 230 and a receiving trough 240, the external feeding device 210 is arranged on the outside of the furnace door 110, the external feeding device 210 includes an external furnace track 211, a feeding trolley 230 is slidably arranged on the external furnace track 211, and the feeding trolley 230 is provided with a receiving trough 240 for placing the material to be pyrolyzed The material trough 240, in this embodiment, the material receiving trough 240 is used to carry waste carbon fiber composite materials, the in-furnace material receiving device 220 is fixedly installed at the bottom end of the pyrolysis chamber 120, and the in-furnace material receiving device 220 is a furnace track arranged in parallel and capable of horizontally docking with the furnace external track 211; the gas flow distribution system includes an airflow distribution system 410 and a flue gas exhaust system 420, the airflow distribution system 410 is used to introduce gas into the pyrolysis furnace body 100 and allow the introduced gas to circulate internally in the pyrolysis furnace body 100, and the flue gas exhaust system 420 is arranged at the top of the pyrolysis furnace body 100, and is used to discharge the flue gas in the pyrolysis furnace body 100.

[0027] The waste carbon fiber composite material pyrolysis furnace provided in the above-mentioned embodiment adopts a means of simplifying the feeding process to improve the operating efficiency. The embodiment of the present application avoids the cumbersome process of crushing the waste materials in the prior art by optimizing the feeding method of the waste carbon fiber composite material. The prior art requires that the waste carbon fiber composite material must be crushed before it can be fed into the pyrolysis furnace, while the waste carbon fiber composite material pyrolysis furnace of the present embodiment allows larger and uncrushed waste carbon fiber composite materials to be directly fed into the furnace body for processing. By setting a feeding system 200 including an external feeding device 210, an internal receiving device 220, a feeding cart 230 and a receiving trough 240, the waste materials can be flexibly and efficiently fed into the pyrolysis furnace from the outside. Such a design simplifies the operating process, improves the processing efficiency of waste materials, and can reduce manual intervention and reduce time consumption in the feeding process, thereby improving overall production efficiency.

[0028] From the perspective of flexible adaptation to waste materials of different forms, the traditional pyrolysis furnace feeding method usually requires the waste materials to be in a broken form, and cannot adapt to the effective processing of waste carbon fiber composite materials of different forms and volumes. The embodiment of the present application solves this problem by improving the feeding system. The waste carbon fiber composite materials can be directly placed in the receiving trough 240 of the feeding cart 230 outside the pyrolysis furnace body 100, and then the feeding cart 230 carrying the receiving trough 240 is sent to the furnace receiving device 220 in the pyrolysis furnace body 100 through the external furnace track 211. In this way, the pyrolysis furnace can flexibly adapt to different forms of waste materials, especially large-volume block or shell-shaped waste, under the cooperation of the gas flow distribution system, avoiding the limitation of the prior art that can only adapt to broken waste. This flexibility enables the pyrolysis furnace to process a wider range of waste material types, improving the adaptability and scope of use of the equipment.

[0029] Moreover, the embodiment of the present application reasonably arranges the gas flow distribution system, and the gas flow distribution system includes an airflow distribution system 410 and a flue gas exhaust system 420. The airflow distribution system 410 is used to introduce gas into the pyrolysis furnace body 100 and the introduced gas is internally circulated in the pyrolysis furnace body 100, thereby avoiding the problem of uneven airflow distribution in the prior art. Moreover, through the optimized airflow distribution, the waste material can be evenly heated during the pyrolysis process, preventing local overheating or insufficient heating, thereby improving the pyrolysis efficiency and ensuring the recovery quality of the carbon fiber. At the same time, in this embodiment, the flue gas exhaust system 420 is arranged at the top of the pyrolysis furnace body 100 to exhaust the flue gas in the pyrolysis furnace body 100, so as to centrally exhaust the exhausted flue gas for subsequent targeted purification treatment.

[0030] In addition, the pyrolysis furnace for waste carbon fiber composite materials in the embodiment of the present application can not only improve the pyrolysis efficiency, but also protect the integrity of the carbon fiber during the pyrolysis process. The pyrolysis chamber 120 is heated by the heating system 300, and further by adopting the above-mentioned reasonable feeding method and optimized gas flow distribution system, the temperature inside the pyrolysis furnace is evenly distributed, so that the resin matrix in the waste carbon fiber composite materials can be efficiently decomposed without damaging the carbon fiber structure. Moreover, during the pyrolysis process, the heating system 300 and the gas flow distribution system are used to maintain a suitable temperature and airflow distribution in the pyrolysis chamber 120, which can effectively avoid oxidation and thermal damage of the carbon fiber, thereby ensuring a high recovery rate and recovery quality of the carbon fiber, and avoiding the problem of carbon fiber oxidation that may be caused by local overheating during the pyrolysis process.

[0031] In some embodiments, Figure 5-Figure 7As shown, the air flow distribution system 410 includes a gas introduction pipeline system consisting of an air distribution pipe 411 and an upper air inlet pipe 412, and a circulation fan 413 installed at the top of the pyrolysis furnace body 100 to circulate the gas in the furnace.

[0032] like Figure 1 , Figure 6 and Figure 7 As shown, the air distribution pipe 411 is arranged at the bottom of the pyrolysis furnace body 100, and the pipe body of the air distribution pipe 411 for distributing air is distributed on the left and right sides and the rear side of the bottom of the furnace, as shown in FIG. Figure 5 and Figure 8 As shown, the air distribution duct 411 is connected to the air distribution inlet duct 4111, and the air distribution inlet duct 4111 passes through the rear side of the pyrolysis furnace body 100. Air flow holes 4112 for blowing gas into the pyrolysis furnace are evenly opened along the axial direction of the air distribution duct 411. The upper air inlet duct 412 is located above the air distribution duct 411 and is in the middle area in the height direction of the pyrolysis furnace body 100. One end of the upper air inlet duct 412 passes into the pyrolysis furnace body 100, and the other end of the upper air inlet duct 412 passes through the rear side of the pyrolysis furnace body 100. The upper air inlet duct 412 and the air distribution inlet duct 4111 are used to be respectively connected to the air intake system for ventilating the furnace.

[0033] like Figure 2 As shown, the flue gas exhaust system 420 includes a smoke exhaust port 421 opened at the top of the pyrolysis furnace body 100 and a smoke exhaust pipe 422 connected to the smoke exhaust port 421 for smoke exhaust. The top of the pyrolysis furnace body 100 is evenly provided with multiple smoke exhaust ports 421, and the smoke exhaust ports 421 are kept in communication with the inside of the pyrolysis furnace body 100. The smoke exhaust pipe 422 is connected to a smoke conveying pipe 4221 for collecting the smoke, and is further connected to an external smoke treatment device through the smoke conveying pipe 4221 to achieve smoke purification; the circulating fan 413 is an air suction fan, which is used to achieve circulation by sucking the gas inside the pyrolysis furnace.

[0034] In the traditional design, the airflow in the pyrolysis furnace cannot be evenly distributed, which often leads to local overheating or insufficient heating during the pyrolysis process, affecting the pyrolysis efficiency. In the above embodiment, the airflow distribution system 410 effectively solves the problem of uneven airflow inside the pyrolysis furnace through the reasonable layout of the air distribution pipe 411 and the upper air inlet pipe 412. The pipe body of the air distribution pipe 411 for air distribution is distributed on the left and right sides and the rear side of the bottom of the furnace. The upper air inlet pipe 412 is located above the air distribution pipe 411 and in the middle area of ​​the height direction of the pyrolysis furnace body 100. During use, the circulating fan 413 at the top of the pyrolysis furnace body 100 is turned on. Under the action of the circulating fan 413, the gas inside the pyrolysis furnace can circulate, and the airflow can be evenly distributed from the left and right sides and the rear side of the bottom of the pyrolysis furnace to the furnace cavity. The multiple airflow holes 4112 evenly opened along the axial direction of the air distribution pipe 411 allow the airflow to be evenly blown into the pyrolysis furnace, avoiding the problem of uneven temperature during the pyrolysis process. In addition, the use of the air distribution duct 411 and the upper air inlet duct 412 not only facilitates the regulation of the incoming gas, but also simplifies the air inlet channel. This straight-through air inlet design reduces the energy loss of the airflow through a complex path in the traditional system. The airflow can enter the furnace cavity more directly, thereby improving the gas flow efficiency and air intake speed, ensuring the smooth and stable flow of the airflow, and further ensuring the heating uniformity of the waste carbon fiber composite materials during the pyrolysis process.

[0035] During the pyrolysis process, the generated flue gas must be effectively discharged to reduce the risk of environmental pollution. The flue gas exhaust system 420 in this embodiment is provided with multiple exhaust ports 421, and the exhaust ports 421 are connected to the exhaust pipe 422, and the flue gas is collected and discharged through the flue gas delivery pipe 4221. During use, the flue gas in the pyrolysis furnace can be discharged efficiently and timely, avoiding the situation where the flue gas is retained in the furnace body and causes local flue gas accumulation, thereby reducing the pressure in the furnace to ensure the stability of the pyrolysis process.

[0036] In some embodiments, Figure 6 As shown, the airflow distribution system 410 also includes an air duct 414 arranged in the pyrolysis furnace body 100. The air duct 414 is located at the periphery of the pyrolysis chamber 120 and arranged along the length direction of the pyrolysis furnace body 100. Such an arrangement can cover the range of the pyrolysis chamber 120 to the greatest extent, providing a basis for the uniform distribution of the airflow. An air duct baffle 500 is arranged between the air duct 414 and the pyrolysis chamber 120. The air duct baffle 500 is an inner furnace wall structure of the pyrolysis furnace body 100. The air duct baffle 500, as an inner furnace wall structure of the pyrolysis furnace body 100, can not only isolate the air duct 414 from the pyrolysis chamber 120, but also play a role in guiding the airflow. Such a design helps the airflow to circulate between the pyrolysis chamber 120 and the air duct 414, and improves the guidance and control of the airflow. Fig. 9 The structure of the air duct baffle 500 used in this embodiment is given. Figure 6 As shown, the air duct 414 includes a top air duct 4141 located at the top of the furnace and side air ducts 4142 located on the left and right sides of the furnace. The top air duct 4141 is connected to the two side air ducts 4142 to form a complete air flow channel. The air intake end of the circulation fan 413 is located in the top air duct 4141, so that the circulation fan 413 can effectively inhale the gas in the pyrolysis chamber 120 and promote it to circulate in the air duct 414. The air distribution pipes on the left and right sides of the air distribution pipe 411 are respectively located at the bottom ends of the two side air ducts 4142, so that the air flow can evenly pass through the air distribution pipe 411 into the pyrolysis chamber 120. A first air duct opening 41421 communicating with the pyrolysis chamber 120 is reserved at the lower part of the side air duct 4142, close to the furnace, and a second air duct opening 41411 communicating with the pyrolysis chamber 120 is reserved at the bottom end of the top air duct 4141. These designs ensure that the gas can enter the pyrolysis chamber 120 in a controlled manner.

[0037] In the above embodiment, the setting of the air duct 414 is closely matched with the spatial structure of the pyrolysis chamber 120. By arranging the air duct 414 at the periphery of the pyrolysis chamber and along the length direction of the pyrolysis furnace body 100, the air flow can cover the entire area of ​​the pyrolysis chamber. The top air duct 4141 is located at the top of the furnace body and is connected with the side air ducts 4142 on the left and right sides to form an overall air flow network that runs through the top and both sides of the furnace body. This layout not only effectively expands the coverage of the airflow, but also through the mutual coordination of the airflow on the top and both sides, especially the lower part of the side air duct 4142 is close to the pyrolysis chamber. A first air duct opening 41421 is provided, and a second air duct opening 41411 is reserved at the bottom of the top air duct 4141, so that the gas in the furnace is sucked into the top air duct 4141 from the middle through the second air duct opening 41411, and then blown out from both sides through the first air duct opening 41421, thereby forming a good air flow circulation. The position distribution of these air duct openings enables the airflow to circulate into the pyrolysis chamber, avoiding the problem of local overheating or airflow dead corners caused by the concentration of airflow in a certain area in traditional technology. Through this all-round airflow coverage, the waste carbon fiber composite materials can be evenly heated during the pyrolysis process, thereby improving the pyrolysis efficiency and the material processing quality.

[0038] In addition, in this embodiment, the air duct baffle 500 provided between the air duct 414 and the pyrolysis chamber 120 serves as an inner furnace wall structure, which not only serves to isolate the air duct from the pyrolysis chamber, but also significantly enhances the guiding and controllability of the airflow. The use of the air duct baffle 500 allows the airflow entering the air duct 414 to enter the pyrolysis chamber 120 only through the reserved first air duct opening 41421 and the second air duct opening 41411, thereby avoiding the turbulence and impact caused by a large amount of airflow directly entering the pyrolysis chamber 120. Especially in the pyrolysis process of waste materials, the direct impact of the airflow may cause the local gas to be too strong, thereby affecting the uniform heating of the material. Through the guiding effect of the air duct baffle 500, the airflow is optimally distributed in the air duct and enters the pyrolysis chamber at a controlled speed, making the entire pyrolysis process more stable. In addition, the isolation design of the air duct baffle 500 can also avoid the problem of reverse flow of airflow during pyrolysis, thereby improving the stability of the airflow. This design, through the cooperation of the air duct 414 and the air duct baffle 500, not only optimizes the airflow path, but also enhances the accuracy of airflow control, providing a reliable guarantee for the efficient pyrolysis of waste materials.

[0039] At the same time, the air intake end of the circulating fan 413 is located in the top air duct 4141, so that the airflow in the pyrolysis chamber 120 can be guided and sucked into the top air duct 4141, and an airflow circulation is formed through the air duct 414 formed by the top air duct 4141 and the side air duct 4142. The connection design of the top air duct 4141 and the side air duct 4142 enables the airflow to circulate between the top and the two sides of the furnace body, further enhancing the fluidity of the gas in the furnace. In addition, the left and right sides of the air distribution duct 411 are arranged at the bottom of the side air duct 4142. Through the air flow holes of the air distribution duct, the circulating gas can be evenly distributed into the pyrolysis chamber 120. This layout combines the air duct 414, the circulating fan 413 and the air distribution duct 411 to form a closed-loop air circulation system. The gas is driven by the circulating fan 413 to achieve the suction from the pyrolysis chamber to the air duct and the uniform reflux from the air duct to the pyrolysis chamber, which not only improves the circulation efficiency of the airflow, but also makes the airflow entering the pyrolysis chamber have a more stable flow rate and flow rate. Through the optimization of this circulation system, the airflow in the entire pyrolysis chamber is more uniform, thereby avoiding the problem of insufficient pyrolysis caused by unstable airflow or uneven flow rate. In addition, the combination of the circulating fan 413 and the top air duct 4141 can make greater use of the space in the furnace body and improve the overall performance of the equipment.

[0040] In some embodiments, Figure 1 and Figure 2 As shown, the external furnace track 211 adopts an upper and lower double track structure, and the external furnace track 211 includes an upper track 2111 and a lower track 2112 . The upper track 2111 is located above the lower track 2112 and can move on the lower track 2112 along the length direction.

[0041] The out-of-furnace feeding device 210 also includes a track pulley 212 and an upper track pushing device 213. The track pulley 212 is installed at the front and rear position below the upper track 2111, and is used to support and guide the upper track 2111 to slide on the lower track 2112 to ensure that the upper track 2111 can move smoothly. The upper track 2111 is slidably set on the lower track 2112 through the track pulley 212. A pulley mounting seat 2121 for mounting the track pulley 212 is provided below the upper track 2111 to ensure that the track pulley 212 can be firmly mounted on the upper track 2111 and effectively support the movement of the upper track 2111.

[0042] The upper rail push device 213 is horizontally arranged on the lower rail 2112 and is located between the rail pulleys 212 at the front and rear positions. The output end of the upper rail push device 213 is connected to the pulley mounting seat 2121 in the front, and the upper rail 2111 can move forward and backward under the pushing action of the upper rail push device 213. During use, through the pushing action of the upper rail push device 213, the movement of the upper rail 2111 can be conveniently controlled, so as to achieve the adjustment of the feeding position of the waste carbon fiber composite material, so as to achieve the rapid and accurate docking of the upper rail 2111 with the in-furnace material receiving device 220, and improve the flexibility and operation efficiency of the feeding device. Optionally, the front and rear of the lower rail 2112 are respectively provided with limited blocks to limit the sliding range of the upper rail 2111 and prevent the excessive sliding of the upper rail 2111.

[0043] Compared with the fixed track design of the traditional feeding device, in the above embodiment, this embodiment adopts an upper and lower double track structure through the adjustable design of the upper track 2111, and the outer track 211 of the furnace adopts a double track structure, and the feeding car 230 is slidably set on the upper track 2111 of the outer track 211, and a receiving trough 240 is set on the feeding car 230 for placing the material to be pyrolyzed, wherein the upper track 2111 can slide along the length direction on the lower track 2112, such a design makes the outer feeding device 210 of the furnace have greater adjustment flexibility, and the position of the upper track 2111 can be quickly adjusted to facilitate docking with the in-furnace receiving device 220, and then the feeding car 230 is accurately sent into the furnace. The use of the receiving trough 240 is convenient for holding waste carbon fiber composite materials in different forms, and the receiving trough 240 loaded with waste carbon fiber composite materials can be quickly and accurately sent into the furnace through the movement of the feeding car 230, thereby ensuring smooth and efficient use.

[0044] In the above embodiment, the out-of-furnace feeding device 210 also enables the upper track 2111 to slide smoothly on the lower track 2112 through the synergy between the track pulley 212 and the upper track pushing device 213. The track pulley 212 is installed at the front and rear positions below the upper track 2111, responsible for supporting the upper track 2111 and guiding its smooth movement on the lower track 2112. This support and guidance reduces the resistance caused by friction, and can also reduce the vibration or instability of the upper track 2111 during movement. Furthermore, the setting of the pulley mounting seat 2121 can stabilize the position of the track pulley 212 on the upper track 2111, prevent the pulley from loosening or deviating, and ensure that the upper track 2111 always remains stable during the sliding process. In coordination with this is an upper track pusher 213, which provides a forward and backward driving force, so that the upper track 2111 can slide along a precise track, and the track pusher 213 can smoothly and evenly push the upper track 2111 to move forward and backward along the lower track 2112. Through this precise pushing, the overall operation of the furnace feeding device 210 becomes smoother, avoiding the problem of unstable feeding caused by track jamming or uneven pushing, thereby making the application in the production process more reliable. Moreover, compared with the traditional feeding method, the use of the track pusher 213 can ensure that each push of the upper track 2111 meets the predetermined position, thereby reducing manual operation errors. In actual applications, the track pusher 213 can provide a driving force for the upper track 2111 through a stable mechanical drive or electric drive mode, thereby making the feeding process more automated and accurate. Optionally, the upper track pusher 213 adopts an electric push rod drive mechanism, which pushes the upper track 2111 to move on the lower track 2112 through the telescopic movement of the push rod, improves the feeding efficiency, and ensures the smoothness and reliability of the feeding process.

[0045] In some embodiments, the waste carbon fiber composite material pyrolysis furnace further includes a monitoring system, which is used to monitor the operating status of the pyrolysis furnace in real time, such as Figure 2-Figure 5 As shown, the monitoring system includes a temperature sensor assembly 600 , a pressure sensor assembly 700 , and an oxygen content sensor 800 .

[0046] The temperature sensor assembly 600 includes a first temperature sensor 610 for monitoring the temperature in the pyrolysis chamber 120 and a second temperature sensor 620 for monitoring the temperature of the emitted flue gas; the pressure sensor assembly 700 includes a plurality of pressure sensors for monitoring the gas pressure in the pyrolysis chamber 120; and the oxygen content sensor 800 is used to detect the oxygen content in the emitted flue gas.

[0047] In the above embodiment, the temperature sensor assembly 600 is composed of a first temperature sensor 610 and a second temperature sensor 620. The multi-point arrangement design of temperature monitoring using the first temperature sensor 610 and the second temperature sensor 620 makes the temperature monitoring of the pyrolysis furnace more accurate and comprehensive. The first temperature sensor 610 can obtain the temperature data in the pyrolysis chamber 120 in real time, which helps to make timely adjustments to potential temperature unevenness or local overheating problems. The second temperature sensor 620 monitors the exhaust flue gas temperature to indirectly reflect the efficiency of heat utilization in the exhaust process. For example, if the exhaust gas temperature rises abnormally, it can be judged that there may be a problem of excessive heat loss in the pyrolysis process, and the heating power or airflow distribution strategy needs to be adjusted to achieve a uniform and efficient pyrolysis environment in the pyrolysis chamber.

[0048] In addition, the pressure sensor assembly 700 of this embodiment can provide the ability to monitor the pressure in the chamber by arranging multiple pressure sensors in the pyrolysis chamber 120. This can not only capture the dynamic changes of pressure in real time, but also better combine the data of the temperature sensor to control the operation of the pyrolysis furnace during use. The oxygen content sensor 800 is used to monitor the oxygen content in the exhaust gas during use, which is not only a monitoring of the exhaust quality, but also a basis for judging whether the entire pyrolysis process is in the best operating state.

[0049] In some embodiments, there are at least two first temperature sensors 610, which can monitor the temperature at different heights in the pyrolysis chamber 120 respectively. The first temperature sensor 610 is arranged above and below the rear furnace wall of the pyrolysis furnace body 100. The sensing end of the first temperature sensor 610 is located in the pyrolysis chamber 120. The second temperature sensor 620 is arranged on the smoke exhaust duct 422; pressure sensors are respectively arranged on the rear furnace wall of the pyrolysis furnace body 100 and in front of the side furnace wall of the pyrolysis furnace body 100; the oxygen content sensor 800 is arranged on the flue gas conveying duct 4221 near the smoke exhaust duct 422.

[0050] The first temperature sensor 610 in this embodiment is arranged above and below the rear furnace wall of the pyrolysis furnace body 100, and its sensing end is deep into the pyrolysis chamber 120. This multi-point distribution design can monitor the temperature state in the pyrolysis chamber from the top and bottom respectively, and capture the temperature change data of different height areas, so as to provide a basis for further adjusting the power output of the heating system 300. At the same time, the second temperature sensor 620 is arranged on the exhaust pipe 422, and indirectly evaluates the heat utilization efficiency in the pyrolysis process by monitoring the temperature of the exhaust gas. If the exhaust temperature rises abnormally, it may mean that there is a problem of heat loss in the system, and it is necessary to reduce energy consumption by optimizing the airflow distribution or adjusting the heating power. The pressure sensor assembly 700 adopts a multi-point arrangement of the rear furnace wall and the side furnace wall. The pressure sensor of the rear furnace wall can reflect the overall pressure level inside the cavity, while the pressure sensor in front of the side furnace wall focuses on the pressure anomaly that may occur during the local gas flow, which helps to identify local airflow blockage. The oxygen content sensor 800 is installed in the flue gas delivery duct 4221 near the exhaust duct 422. It is designed to monitor the oxygen content in the exhaust flue gas in real time. The monitoring of oxygen content provides reliable and important monitoring data for the operation of the pyrolysis furnace. For example, when the oxygen content sensor 800 detects that the oxygen content in the flue gas is abnormally increased, the air intake of the air distribution duct 411 or the operating state of the circulating fan 413 can be adjusted in time to ensure that the oxygen concentration in the cavity is maintained within a reasonable range to avoid the oxidation reaction from damaging the performance of the carbon fiber. In addition, when the oxygen content is low, the gas circulation rate can be increased to optimize the airflow environment of the pyrolysis reaction.

[0051] In some embodiments, the electric heating system used in the heating system 300 is a plurality of finned electric heating tubes, which are arranged inside the air duct and connected to the temperature control device through cables to provide a uniform heat source. Figure 7 As shown, the finned electric heating tubes are arranged in two side air ducts 4142 of the air duct 414 .

[0052] This embodiment uses multiple finned electric heating tubes as the core components of the heating system 300. The use of finned electric heating tubes can increase the heat exchange area and more efficiently convert electrical energy into thermal energy, so as to quickly increase the temperature of the pyrolysis chamber in a short time, shorten the heating time, and improve the pyrolysis efficiency. At the same time, the use of multiple finned electric heating tubes can disperse the heat load, so as to be used reliably and stably.

[0053] In addition, the finned electric heating tube is arranged inside the air duct, and the airflow circulation effect in the air duct can be fully utilized during use, so that the heat can be evenly distributed to various areas of the pyrolysis chamber 120 along with the airflow. This arrangement overcomes the problem of local overheating or uneven heat distribution that may be caused by the traditional heating system, ensures that the temperature gradient in the pyrolysis chamber is smaller, and enables the waste carbon fiber composite material to be pyrolyzed in a stable and uniform temperature environment, which not only helps to improve the material decomposition efficiency of the pyrolysis process, but also effectively avoids the problem of decreased carbon fiber recovery rate caused by uneven temperature. The finned electric heating tube is connected to the temperature control device through a cable to realize the temperature control adjustment of the heating system. By adjusting the heating power of the finned electric heating tube, the problem of damage to the carbon fiber performance due to excessive temperature or insufficient pyrolysis due to too low temperature can be avoided. In practical applications, according to the actual operating state of the pyrolysis furnace, the heat output of the heating system 300 is flexibly adjusted by the temperature control device to ensure that the pyrolysis process is always within the optimal temperature range, which not only helps to improve the pyrolysis efficiency, but also can further reduce energy consumption, making the operation of the entire system more economical and efficient.

[0054] In some embodiments, four smoke exhaust ports 421 are evenly arranged at the top of the pyrolysis furnace body 100, and the four smoke exhaust ports 421 are all connected to the top air duct 4141, so as to discharge the smoke inside the pyrolysis furnace body 100. The four smoke exhaust ports 421 are distributed in a square shape and are arranged at the four corner areas of the top of the pyrolysis furnace body 100. The number of circulating fans 413 is two, and the two circulating fans 413 are installed at the top of the pyrolysis furnace body 100 at intervals in front and behind. Figure 7 and Fig. 9 As shown, the number of second air duct openings 41411 reserved at the bottom end of the top air duct 4141 is two, and the two second air duct openings 41411 correspond to the positions of the two circulation fans 413, and the air intake ends of the two circulation fans 413 are respectively located in the top air duct 4141 above the two second air duct openings 41411. In this embodiment, the two second air duct openings 41411 are reserved at the bottom end of the top air duct 4141, which means that the two second air duct openings 41411 are opened on the air duct baffle 500.

[0055] In the above embodiment, four smoke exhaust ports 421 are evenly arranged at the top of the pyrolysis furnace body 100, and are distributed in a square shape in the four corner areas of the top. This distribution method effectively expands the smoke exhaust coverage, so that the smoke in the pyrolysis chamber 120 can be quickly discharged from multiple outlets in a shorter path. Compared with the traditional centralized smoke exhaust port design, the square distribution reduces the unevenness of the smoke emission path and avoids the decrease in pyrolysis efficiency that may be caused by local smoke retention. At the same time, the design of the four-corner smoke exhaust matches the airflow characteristics inside the pyrolysis chamber, and reduces the pressure fluctuation amplitude in the chamber through multi-directional discharge, thereby making the overall operation of the cavity more stable. Especially under high-temperature continuous operation conditions, uniform smoke exhaust can also effectively reduce the load of the smoke exhaust system and improve the overall efficiency of smoke emission.

[0056] The front-to-back spacing arrangement of the two circulation fans 413 can enhance the uniformity and coverage of the gas circulation. The two circulation fans 413 are arranged in a front-to-back spacing arrangement and are respectively installed at the top of the pyrolysis furnace body 100. The air intake end of each circulation fan 413 corresponds to the second air duct opening 41411 reserved at the bottom of the top air duct 4141. Through this design, the circulation fan 413 can directly suck the gas in the pyrolysis chamber 120 into the top air duct 4141 through the second air duct opening 41411 and promote its circulation flow. The use of the two fans arranged in a front-to-back spacing arrangement can significantly reduce the dead angle and turbulence in the gas flow process. Compared with the single fan design, the dual fan design greatly improves the uniformity of gas circulation, thereby ensuring that the temperature distribution inside the cavity is more consistent, and at the same time reduces the problem of insufficient material decomposition caused by uneven gas flow during the pyrolysis reaction. Especially when processing large volumes of waste carbon fiber composite materials, the distributed operation mode of the dual fans can more efficiently maintain the dynamic balance of the gas in the cavity and further improve the pyrolysis efficiency.

[0057] Furthermore, two second air duct openings 41411 are reserved at the bottom of the top air duct 4141, and correspond one to one with the air inlet ends of the two circulation fans 413. This layout forms a complete airflow circulation path. The top air duct 4141 is not only used to accommodate the air inlet ends of the circulation fans 413, but also used to guide the airflow distribution, so that the gas flow in the cavity is more orderly under the guidance of the air duct 414. The cooperation between the air duct 414 and the circulation fan 413 optimizes the overall flow efficiency of the gas inside the pyrolysis chamber 120 through the air inlet-circulation-distribution mode.

[0058] In some embodiments, Figure 6As shown, a heat-insulating layer cavity 130 for filling a heat-insulating material 131 is provided in the furnace wall of the pyrolysis furnace body 100; the heat-insulating layer cavity 130 is located at the periphery of the air duct 414 and between the outer furnace wall of the pyrolysis furnace body 100 and the channel wall of the air duct 414; the heat-insulating material 131 filled in the heat-insulating layer cavity 130 is an aluminum silicate needle-punched blanket.

[0059] In the above embodiment, a heat insulation layer cavity 130 is added to the structure of the pyrolysis furnace body 100, and its position is located outside the air duct 414 and between the outer furnace wall of the pyrolysis furnace and the channel wall of the air duct 414. This arrangement makes full use of the structural space of the furnace wall of the pyrolysis furnace, closely combines the heat insulation function with the overall design of the furnace body, and makes the heat insulation layer cavity 130 a part of the furnace wall. The position selection of the heat insulation layer cavity 130 is particularly critical. The arrangement of the heat insulation layer cavity 130 between the outer furnace wall and the channel wall of the air duct 414 can not only prevent the high-temperature heat in the pyrolysis chamber 120 from diffusing outward, but also maintain the thermal stability of the air flow inside the air duct by isolating the air duct from the external heat exchange. This cavity structure has a higher space utilization rate and can ensure that the stability of the heat insulation material is not disturbed by the external environment, thereby achieving more efficient heat management and ensuring the uniform distribution of heat and efficiency improvement when the pyrolysis furnace is running for a long time.

[0060] The aluminum silicate needle-punched blanket filled in the heat insulation layer cavity 130 has a low thermal conductivity, high temperature resistance and excellent heat insulation effect. The filling of the aluminum silicate needle-punched blanket in the heat insulation layer cavity 130 not only forms a strong heat insulation barrier, preventing the heat inside the pyrolysis chamber 120 from diffusing outward through the furnace wall and the air duct wall, but also effectively reduces the temperature of the outer surface of the pyrolysis furnace, improving the safety and energy consumption level of the equipment. In addition, the aluminum silicate needle-punched blanket has good thermal shock resistance and long-term thermal stability, and can maintain structural integrity during the frequent heating and cooling of the pyrolysis furnace, avoiding material aging or deformation problems, thereby significantly extending the service life of the pyrolysis furnace. Compared with traditional insulation materials, the aluminum silicate needle-punched blanket also has the advantages of strong flexibility and light weight, which is more convenient during installation and maintenance, reducing the overall maintenance cost of the pyrolysis furnace. The application of this material makes the equipment not only more efficient, but also has higher stability and durability under long-term high-temperature operation conditions.

[0061] The method for using the waste carbon fiber composite material pyrolysis furnace provided in the embodiment of the present application is as follows: When using a waste carbon fiber composite material pyrolysis furnace, first ensure that the power supply of the equipment, the air intake system for ventilation into the furnace, and the flue gas exhaust system are connected normally, and at the same time check whether the temperature sensor assembly 600, the pressure sensor assembly 700, and the oxygen content sensor 800 in the monitoring system are in normal working condition. Load the waste carbon fiber composite material to be processed into the receiving trough 240 on the feeding cart 230, and the feeding cart 230 slides to the outside of the furnace door 110 through the external furnace track 211. After opening the furnace door 110, the feeding cart 230 is pushed to the designated position in the pyrolysis chamber 120 through the horizontal docking of the external furnace track 211 and the internal furnace track, and the furnace door 110 is closed to form a closed environment. Before starting the heating system 300, nitrogen is first introduced into the furnace through the air distribution pipe 411 and the upper air inlet pipe 412. When the oxygen content in the furnace drops below 2%, the heating system 300 is started again. The multiple finned electric heating tubes arranged inside the air duct 414 begin to provide a uniform heat source. The finned electric heating tubes are connected to the temperature control device through cables, and the heat is distributed to various areas of the pyrolysis chamber 120 through the air duct 414 and the air distribution pipe 411. At the same time, the circulating fan 413 inhales the gas in the pyrolysis chamber 120, and realizes the circulation of the gas through the top air duct 4141 and the air distribution pipe 411, further optimizing the temperature distribution in the chamber and ensuring that the pyrolysis material is heated uniformly. In this process, the first temperature sensor 610 monitors the temperature at different heights in the pyrolysis chamber 120 in real time, the second temperature sensor 620 monitors the flue gas emission temperature, the pressure sensor monitors the gas pressure in the pyrolysis chamber 120, and the oxygen content sensor 800 detects the oxygen content in the flue gas delivery pipe 4221. During the heating process, the heating rate is 10℃ / min, and the temperature rises to 500℃. The temperature control accuracy is ±10℃, and the insulation time is 30-60min (constant temperature time). As the pyrolysis process proceeds, the resin matrix of the waste carbon fiber composite material gradually decomposes, and the released smoke enters the smoke exhaust pipe 422 through the top smoke exhaust port 421, and finally converges to the smoke delivery pipe 4221 for discharge, so as to centrally purify the smoke and ensure that the smoke in the cavity is quickly discharged without affecting the reaction environment. When the pyrolysis insulation process is completed, the air intake system for introducing nitrogen into the furnace, as well as the heating system 300 and the circulating fan 413 are closed. After the temperature in the furnace is less than 50℃, the furnace door 110 is opened, and the feeding car 230 is moved from the furnace to the outside of the furnace through the cooperation of the furnace track and the furnace track 211, and the pyrolysis-completed materials are unloaded, and the equipment is cleaned to prepare for the next round of pyrolysis operation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A waste carbon fiber composite material pyrolysis furnace, characterized in that: It comprises a pyrolysis furnace body (100), a feeding system (200), a heating system (300) and a gas flow distribution system; A furnace door (110) is arranged at the front side of the pyrolysis furnace body (100); a pyrolysis chamber (120) is formed inside the pyrolysis furnace body (100); a heating system (300) for heating the pyrolysis chamber (120) is arranged inside the pyrolysis furnace body (100); the heating system (300) is an electric heating system; the feeding system (200) comprises an external feeding device (210), an internal receiving device (220), a feeding trolley (230) and a receiving trough (240); the external feeding device (210) is arranged at the outside of the furnace door (110); the external feeding device (210) comprises an external rail (211); the feeding trolley (230) is slidably arranged on the external rail (211); the feeding system (200) comprises an external feeding device (210), an internal receiving device (220), a feeding trolley (230) and a receiving trough (240); The vehicle (230) is provided with a material receiving trough (240) for placing materials to be pyrolyzed. The in-furnace material receiving device (220) is fixedly installed at the bottom end of the pyrolysis chamber (120). The in-furnace material receiving device (220) is an in-furnace rail arranged in parallel and capable of horizontally docking with the out-furnace rail (211). The gas flow distribution system comprises an airflow distribution system (410) and a flue gas exhaust system (420). The airflow distribution system (410) is used to introduce gas into the pyrolysis furnace body (100) and to allow the introduced gas to circulate internally in the pyrolysis furnace body (100). The flue gas exhaust system (420) is arranged at the top end of the pyrolysis furnace body (100) and is used to exhaust the flue gas in the pyrolysis furnace body (100).

2. The waste carbon fiber composite material pyrolysis furnace according to claim 1, characterized in that: The air flow distribution system (410) comprises a gas introduction pipeline system consisting of an air distribution pipe (411) and an upper air inlet pipe (412), and a circulation fan (413) installed at the top of the pyrolysis furnace body (100) to circulate the gas in the furnace; The air distribution pipe (411) is arranged at the bottom end of the furnace body (100) of the pyrolysis furnace. The pipe body of the air distribution pipe (411) for distributing air is distributed on the left and right sides and the rear side of the bottom end of the furnace. The air distribution pipe (411) is connected to an air distribution air inlet pipe (4111). The air distribution air inlet pipe (4111) passes through the rear side of the furnace body (100) of the pyrolysis furnace. The air distribution pipe (411) is evenly provided with air flow holes (4112) along the axial direction of the pipe for blowing gas into the pyrolysis furnace. The upper air inlet pipe (412) is located above the air distribution pipe (411) and in the middle area of ​​the pyrolysis furnace body (100) in the height direction; one end of the upper air inlet pipe (412) passes into the pyrolysis furnace body (100), and the other end of the upper air inlet pipe (412) passes through the rear side of the pyrolysis furnace body (100); the upper air inlet pipe (412) and the air distribution pipe (4111) are used to be respectively connected to an air intake system for ventilating the furnace; The smoke exhaust system (420) comprises a smoke exhaust port (421) provided at the top of the pyrolysis furnace body (100) and a smoke exhaust pipe (422) connected to the smoke exhaust port (421) for exhausting smoke. The top of the pyrolysis furnace body (100) is evenly provided with a plurality of the smoke exhaust ports (421). The smoke exhaust ports (421) are connected to the inside of the pyrolysis furnace body (100). The smoke exhaust pipe (422) is connected to a smoke conveying pipe (4221) for collecting smoke. The circulating fan (413) is an air suction fan for achieving circulating flow by sucking gas from the inside of the pyrolysis furnace.

3. The waste carbon fiber composite material pyrolysis furnace according to claim 2, characterized in that: The air flow distribution system (410) further comprises an air duct (414) arranged in the pyrolysis furnace body (100); the air duct (414) is located at the periphery of the pyrolysis chamber (120) and is arranged along the length direction of the pyrolysis furnace body (100); an air duct baffle (500) is arranged between the air duct (414) and the pyrolysis chamber (120); the air duct baffle (500) is an inner furnace wall structure of the pyrolysis furnace body (100); the air duct (414) comprises a top air duct (4141) located at the top of the furnace and side air ducts (4142) located at the left and right sides of the furnace. 2), the top air duct (4141) is connected to the two side air ducts (4142), the air intake end of the circulating fan (413) is located in the top air duct (4141), the air distribution pipes on the left and right sides of the air distribution pipe (411) are respectively located at the bottom ends of the two side air ducts (4142), the lower part of the side air duct (4142) close to the furnace is reserved with a first air duct opening (41421) communicating with the pyrolysis chamber (120), and the bottom end of the top air duct (4141) is reserved with a second air duct opening (41411) communicating with the pyrolysis chamber (120).

4. The waste carbon fiber composite material pyrolysis furnace according to claim 2 or 3, characterized in that: The external furnace track (211) adopts an upper and lower double track structure, the external furnace track (211) comprises an upper track (2111) and a lower track (2112), the upper track (2111) is located above the lower track (2112) and can move along the length direction on the lower track (2112); The out-of-furnace feeding device (210) further comprises a track pulley (212) and an upper track pushing device (213); the track pulley (212) is mounted at a front-to-rear position below the upper track (2111) and is used to support and guide the upper track (2111) to slide on the lower track (2112); the upper track (2111) is slidably arranged on the lower track (2112) via the track pulley (212); a pulley mounting seat (2121) for mounting the track pulley (212) is arranged below the upper track (2111); the upper track pushing device (213) is horizontally arranged on the lower track (2112) and is located between the track pulleys (212) at the front-to-rear position; an output end of the upper track pushing device (213) is connected to the pulley mounting seat (2121) at the front; the upper track (2111) can move forward and backward under the pushing action of the upper track pushing device (213).

5. The waste carbon fiber composite material pyrolysis furnace according to claim 2 or 3, characterized in that: Also included is a monitoring system, the monitoring system is used to monitor the operating status of the pyrolysis furnace in real time, the monitoring system includes a temperature sensor assembly (600), a pressure sensor assembly (700) and an oxygen content sensor (800); The temperature sensor assembly (600) comprises a first temperature sensor (610) for monitoring the temperature in the pyrolysis chamber (120) and a second temperature sensor (620) for monitoring the temperature of the emitted flue gas; the pressure sensor assembly (700) comprises a plurality of pressure sensors for monitoring the gas pressure in the pyrolysis chamber (120); and the oxygen content sensor (800) is used to detect the oxygen content in the emitted flue gas.

6. The waste carbon fiber composite material pyrolysis furnace according to claim 5, characterized in that: The number of the first temperature sensors (610) is at least two, and they are capable of respectively monitoring the temperatures at different heights in the pyrolysis chamber (120); the first temperature sensors (610) are arranged above and below the rear furnace wall of the pyrolysis furnace body (100); the first temperature sensors (610) are installed, and the sensing end of the first temperature sensor (610) is located in the pyrolysis chamber (120); the second temperature sensor (620) is arranged on the smoke exhaust pipe (422); the pressure sensors are respectively arranged on the rear furnace wall of the pyrolysis furnace body (100) and in front of the side furnace wall of the pyrolysis furnace body (100); and the oxygen content sensor (800) is arranged on the position of the smoke conveying pipe (4221) close to the smoke exhaust pipe (4222).

7. The waste carbon fiber composite material pyrolysis furnace according to claim 3, characterized in that: The electric heating system adopted by the heating system (300) is a plurality of finned electric heating tubes, which are arranged inside the air duct (414) and connected to the temperature control device via cables to provide a uniform heat source.

8. The waste carbon fiber composite material pyrolysis furnace according to claim 3, characterized in that: Four smoke exhaust ports (421) are evenly arranged at the top of the pyrolysis furnace body (100), and the four smoke exhaust ports (421) are distributed in a square shape and are arranged at four corner areas of the top of the pyrolysis furnace body (100). The number of the circulating fans (413) is two, and the two circulating fans (413) are installed at the top of the pyrolysis furnace body (100) at intervals in front and back. The number of the second air duct ports (41411) reserved at the bottom of the top air duct (4141) is two, and the two second air duct ports (41411) correspond to the positions of the two circulating fans (413), and the air intake ends of the two circulating fans (413) are respectively located in the top air duct (4141) above the two second air duct ports (41411).

9. The waste carbon fiber composite material pyrolysis furnace according to claim 3 or 8, characterized in that: A heat insulation layer cavity (130) for filling a heat insulation material (131) is provided in the furnace wall of the pyrolysis furnace body (100); the heat insulation layer cavity (130) is located at the periphery of the air duct (414) and between the outer furnace wall of the pyrolysis furnace body (100) and the channel wall of the air duct (414); the heat insulation material (131) filled in the heat insulation layer cavity (130) is an aluminum silicate needle-punched blanket.

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