Pyrolysis device for composite Sorona fibers

Abstract

The invention relates to the technical field of pyrolysis devices, in particular to a composite Sorona fiber pyrolysis device which comprises a base, the upper end of the base is fixedly connected with a buffer tank, and the inner side of the buffer tank is provided with a backflow mechanism used for limiting fiber particles to conduct backflow repeated pyrolysis. A crushing mechanism used for conducting secondary crushing on the limiting fiber particles is installed below the filter plate on the inner side of the buffer tank, an electromagnetic valve is installed at the lower end of the buffer tank, and a discharging mechanism used for discharging the fiber particles is installed at the lower end of the electromagnetic valve. A collecting mechanism used for recycling fine fiber particles is installed on the inner side of the buffer tank, through centrifugal screening of a filter plate, large particles are intercepted and subjected to atomization spraying catalytic softening, and through cooperation of elastic rolling of a pressing shaft and dredging of a silicon carbide scraper of a spring telescopic rod, the particle size of the particles is reduced. And the catalyst is uniformly sprayed on the surface of the bulk fiber through the piezoelectric ultrasonic atomizing nozzle, so that the recovery rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrolysis devices, and particularly to a pyrolysis device for composite Sorona fibers. Background Technique

[0002] As an excellent bio-based material, composite Sorona fibers have been increasingly widely used in fields such as textiles in recent years. 37% of its raw materials are derived from corn fibers, with natural environmental protection characteristics. With the increasing demand for resource recycling and utilization, it is crucial to pyrolyze waste composite Sorona fibers to achieve resource recycling.

[0003] The existing process uses extensive crushing and single heating, resulting in uneven heating of fiber particles, incomplete depolymerization reaction, low pyrolysis rate, and a large number of high molecular chains not being effectively broken. Recyclable resources are not fully utilized. In addition, the pyrolyzed materials lack refined classification treatment. Large particles have low secondary pyrolysis efficiency due to insufficient contact area with the catalyst; the spraying uniformity of the traditional spray-type catalyst is less than 70%, and there is no mechanical crushing assistance. The surface layer of the fiber is not sufficiently softened, and the depolymerization activation energy is high, seriously affecting the product yield. The dust in the pyrolysis gas is not effectively captured, which not only pollutes the condensation system but also reduces the calorific value of the recovered gas. Therefore, we propose a pyrolysis device for composite Sorona fibers. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technology and solve at least one of the technical problems proposed in the background technique, the present invention proposes a pyrolysis device for composite Sorona fibers.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a pyrolysis device for composite Sorona fibers, including a base. The upper end of the base is fixedly connected with a buffer tank. A first motor is installed outside the buffer tank. A first auger rod is rotatably connected inside the buffer tank. A pyrolysis tube is rotatably connected outside the first auger rod. The outer wall of the pyrolysis tube is provided with a heat insulation and heat preservation layer. The lower end of the pyrolysis tube is fixedly connected with the base. A filter plate is rotatably connected outside the pyrolysis tube. The surface of the filter plate is provided with polytetrafluoroethylene. A heating plate is installed on the inner wall of the buffer tank. A reflux mechanism for restricting the fiber particles to flow back and repeat pyrolysis is installed inside the buffer tank. A crushing mechanism for secondary crushing of the restricted fiber particles is installed below the filter plate inside the buffer tank. A solenoid valve is installed at the lower end of the buffer tank. A discharging mechanism for discharging the fiber particles is installed below the solenoid valve. A collecting mechanism for recovering fine fiber particles is installed inside the buffer tank.

[0006] Preferably, the reflux mechanism includes a mixing component for comprehensively spraying a catalyst on fiber particles, and the reflux mechanism further includes a material crushing component for crushing large fiber particles.

[0007] Preferably, the mixing component includes a first spur gear fixedly connected to the output shaft of a first motor. An upper toothed ring is meshed and connected to the outside of the first spur gear. The inner wall of the upper toothed ring is fixedly connected to a filter plate. A limiting plate is fixedly connected to the outside of the upper toothed ring. The outside of the limiting plate is rotatably connected to the inside of a buffer tank. Two symmetrically arranged fixed toothed plates are fixedly connected to the inner wall of the upper toothed ring. A fixed frame is fixedly connected to the side where the two fixed toothed plates are close to each other. The fixed frame is fixedly connected to the upper end of a first auger rod. Chute grooves are formed on both sides of the fixed toothed plate. A first bracket is slidably connected to the outside of the fixed toothed plate. A second motor is installed at the rear end of the fixed toothed plate. The output shaft of the second motor penetrates through the first bracket. A second spur gear is fixedly connected to the outside of the output shaft of the second motor. The outside of the second spur gear is meshed and connected to the fixed toothed plate.

[0008] Preferably, a catalyst tank is fixedly connected to the upper end of the first bracket. A stirring rod is rotatably connected to the inside of the catalyst tank. A second bevel gear is fixedly connected to the lower end of the stirring rod. A first bevel gear is meshed and connected to the outside of the second bevel gear. The inside of the first bevel gear is fixedly connected to the output shaft of the second motor. An L-shaped discharge pipe is fixedly connected to the lower end of the catalyst tank. One end of the L-shaped discharge pipe is fixedly connected to a piezoelectric ultrasonic atomizing nozzle through a hose.

[0009] Preferably, the material crushing component includes a second bracket fixedly connected to the first bracket. An electric telescopic rod is installed at the rear end of the second bracket. The output shaft of the electric telescopic rod is fixedly connected to the piezoelectric ultrasonic atomizing nozzle. A first sleeve is rotatably connected to the inside of the second bracket. A blanking groove is formed on the outside of the first sleeve. A third spur gear is fixedly connected to the front end of the first sleeve. The inside of the third spur gear is rotatably connected to the L-shaped discharge pipe. A first chain is rotatably connected to the outside of the third spur gear. A fourth spur gear is rotatably connected to the inside of the first chain. The rear end of the fourth spur gear is fixedly connected to the output shaft of the second motor.

[0010] Preferably, a CCD camera is rotatably connected to one side of the second bracket through a mounting block. A third motor is installed at the front end of the mounting block. The output shaft of the third motor is fixedly connected to the CCD camera.

[0011] Preferably, a plurality of symmetrically arranged second sleeves are fixedly connected to the outer side of the first sleeve. A fixed rotating shaft is slidably connected to the inner sides of the two second sleeves. The fixed rotating shaft is designed in a C shape. A pressing shaft is fixedly connected to the lateral outer side of the fixed rotating shaft. A plurality of spring telescopic rods are installed on the outer side of the pressing shaft. The other ends of the spring telescopic rods are fixedly connected with silicon carbide scraping blades. A first spring is arranged at the upper end of the fixed rotating shaft. One end of the first spring is fixedly connected with the second sleeve, and the other end of the first spring is fixedly connected with the fixed rotating shaft.

[0012] Preferably, the crushing mechanism includes a pressure shaft. One end of the pressure shaft is rotatably connected to the upper tooth ring through a rotating shaft. A second spring is arranged on the outer side of the pressure shaft. The lower end of the second spring is fixedly connected with the pressure shaft, and the upper end of the second spring is fixedly connected with the upper tooth ring. A first mounting tube is fixedly connected to a position near one end of the outer side of the pressure shaft. A fourth motor is installed at the front end of the first mounting tube. The output shaft of the fourth motor is fixedly connected with a fifth straight gear. The fifth straight gear is rotatably connected to the inner side of the first mounting tube. A second chain is rotatably connected to the outer side of the fifth straight gear. A plurality of sixth straight gears are rotatably connected to the inner side of the second chain. Crushing plates are fixedly connected to both ends of the sixth straight gear. A second mounting tube is fixedly connected to a position near the other end of the outer side of the pressure shaft. The second mounting tube is designed in a C shape. Two symmetrically arranged seventh straight gears are rotatably connected to the inner side of the second mounting tube. A fourth chain is rotatably connected to the outer sides of the two seventh straight gears. A metal friction surface is arranged on the outer side of the fourth chain. A third chain is rotatably connected to the outer side of one of the two discharging mechanisms. The inner side of the third chain is rotatably connected with the fifth straight gear. A drop ring is rotatably connected to the outer side of the pressure shaft. The inner side of the drop ring is fixedly connected with the pyrolysis tube.

[0013] Preferably, the discharging mechanism includes a fifth chain. A ninth straight gear is rotatably connected to the inner side of the fifth chain. The inner side of the ninth straight gear is fixedly connected with the output shaft of the first motor. An eighth straight gear is rotatably connected to the inner side of the fifth chain. A discharging pipe is fixedly connected to the front end of the eighth straight gear. A second auger rod is rotatably connected to the outer side of the discharging pipe. The upper end of the second auger rod is fixedly connected with the solenoid valve.

[0014] Preferably, the collecting mechanism includes a sixth chain meshing with the ninth straight gear. A tenth straight gear is rotatably connected to the inner side of the sixth chain. An air extraction fan is fixedly connected to the front end of the tenth straight gear. A collecting net is fixedly connected to the rear end of the housing of the air extraction fan.

[0015] Compared with the prior art, the present invention provides a pyrolysis device for composite Sorona fiber, having the following beneficial effects: 1. Through the centrifugal screening of the filter plate, large particles are intercepted. After atomization spray catalytic softening, the fiber particle size is uniformly reduced to ≤2mm with the elastic rolling of the press shaft and the silicon carbide scraper of the spring telescopic rod, which solves the problem of insufficient heating caused by uneven particle size in traditional pyrolysis. The broken fibers are returned to the pyrolysis tube through the first auger rod, and secondary pyrolysis is achieved under the protection of nitrogen at 400-550℃, forming a "screening-crushing-reflux" closed loop, improving the pyrolysis efficiency and ensuring the full pyrolysis of the fibers. When the pressure shaft revolves with the upper gear ring, the height difference structure of the drop ring drives the particle board to press down, and the fibers under the filter plate are staggered sheared and crushed, effectively breaking the fiber agglomeration caused by high temperature. At the same time, the fourth chain wipes the surface of the heating plate to remove the bonded coke, so that the moisture content of the fiber is stably controlled at ≤2% during the preheating stage, avoiding the problem of reduced pyrolysis efficiency and equipment corrosion caused by residual moisture.

[0016] 2. The catalyst is evenly sprayed on the surface of large pieces of fiber through a piezoelectric ultrasonic atomizing nozzle to reduce the activation energy of fiber depolymerization and improve the recovery rate of propylene glycol. The pyrolysis gas is adsorbed by the eddy flow field formed by the exhaust fan to achieve efficient separation of gas. The gas can be directly reused for heating the pyrolysis tube to reduce external energy consumption. The pyrolysis residue is collected by the second auger screw extrusion and can be directly used as building material filler or soil conditioner to avoid secondary pollution caused by traditional landfill. At the same time, the system realizes the automation of "detection-processing-discharge" through PLC control. When the CCD camera does not detect large particles on the filter plate surface for 5 consecutive minutes and the outlet flow of the pyrolysis tube is less than 10%, the residue discharge program is automatically triggered to ensure the utilization of fiber resources and no effective components remain.

[0017] 3. Nitrogen protection in the buffer tank prevents fiber oxidation and combustion, eliminating pollutant generation from the source; the exhaust gas treatment system collects dust-containing gas through the exhaust fan, and collects the remaining volatile organic matter after filtering through the collection net. The electric telescopic rod drives the spray head to move back and forth, which reduces the amount of catalyst and avoids chemical residues caused by excessive spraying. The pyrolysis tube combines infrared radiation with thermal conduction cycle heating, and cooperates with the waste heat recovery device to use the heat of the exhaust gas to preheat the feed air, which is more energy-efficient than traditional electric heating devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the reflux mechanism of the present invention; Figure 4 It is a partial structural schematic diagram of the reflux mechanism of the present invention; Figure 5 The cross-sectional view of the reflux mechanism of the present invention is shown in FIG. Figure 1 ; Figure 6 Partial structural sectional view of the reflux mechanism of the present invention Figure 2 ; Figure 7 Partial structural sectional view of the reflux mechanism of the present invention Figure 3 ; Figure 8 Partial structural sectional view of the reflux mechanism of the present invention Figure 4 ; Figure 9 Overall structural schematic diagram of the crushing mechanism of the present invention; Figure 10 Overall structural sectional view of the crushing mechanism of the present invention; Figure 11 Overall structural sectional view of the discharging mechanism of the present invention; Figure 12 Overall structural sectional view of the collection mechanism of the present invention.

[0019] In the figure: 1, base; 2, buffer tank; 3, first motor; 4, first auger rod; 5, pyrolysis tube; 6, filter plate; 7, heating plate; 8, reflux mechanism; 81, mixing component; 811, first spur gear; 812, upper tooth ring; 813, limiting plate; 814, fixed toothed plate; 815, fixing frame; 816, first bracket; 817, second motor; 818, catalyst tank; 819, second spur gear; 8110, first bevel gear; 8111, second bevel gear; 8112, stirring rod; 8113, L-shaped discharge pipe; 8114, piezoelectric ultrasonic atomizing nozzle; 82, crushing component; 821, second bracket; 822, electric telescopic rod; 823, CCD camera; 824, first sleeve; 825, second sleeve; 826, fixed rotating shaft; 827, first spring; 828, spring telescopic rod; 829, pressing shaft; 8210, third motor; 8211, third spur gear; 8212, first chain; 8213, fourth spur gear; 9, crushing mechanism; 91, pressure shaft; 92, drop ring; 93, first installation pipe; 94, fourth motor; 95, fifth spur gear; 96, second chain; 97, sixth spur gear; 98, crushing plate; 99, third chain; 910, second installation pipe; 911, seventh spur gear; 912, fourth chain; 913, second spring; 10, solenoid valve; 11, discharging mechanism; 111, fifth chain; 112, eighth spur gear; 113, second auger rod; 114, discharge pipe; 12, ninth spur gear; 13, collection mechanism; 131, sixth chain; 132, tenth spur gear; 133, exhaust fan; 134, collection net. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Please refer to Figures 1-12 , a pyrolysis device for composite Sorona fiber, comprising a base 1, a buffer tank 2 is fixedly connected to the upper end of the base 1, a first motor 3 is installed on the outer side of the buffer tank 2, a first auger rod 4 is rotatably connected to the inner side of the buffer tank 2, a pyrolysis tube 5 is rotatably connected to the outer side of the first auger rod 4, a heat insulation and heat preservation layer is arranged on the outer wall of the pyrolysis tube 5, the lower end of the pyrolysis tube 5 is fixedly connected to the base 1, a filter plate 6 is rotatably connected to the outer side of the pyrolysis tube 5, a polytetrafluoroethylene is arranged on the surface of the filter plate 6, a heating plate 7 is installed on the inner wall of the buffer tank 2, a reflux mechanism 8 for limiting and refluxing fiber particles for repeated pyrolysis is installed on the inner side of the buffer tank 2, a crushing mechanism 9 for secondarily crushing the limited fiber particles is installed below the filter plate 6 on the inner side of the buffer tank 2, a solenoid valve 10 is installed at the lower end of the buffer tank 2, a discharging mechanism 11 for discharging fiber particles is installed at the lower end of the solenoid valve 10, and a collecting mechanism 13 for recovering fine fiber particles is installed on the inner side of the buffer tank 2.

[0022] In this embodiment, the reflux mechanism 8 includes a mixing component 81 for comprehensively spraying a catalyst on fiber particles, and the reflux mechanism 8 further includes a crushing component 82 for crushing large fiber particles.

[0023] Specifically, the reflux mechanism 8 as a whole is used to process the limited fiber particles that have not been comprehensively pyrolyzed, so that they can be refluxed for repeated pyrolysis. Among them, the mixing component 81 is responsible for comprehensively spraying the catalyst on the fiber particles to promote the pyrolysis reaction of the fiber particles and improve the pyrolysis efficiency; the crushing component 82 crushes the large fiber particles to reduce the particle size of the fiber particles so that they can pass through the filter plate 6 for re-pyrolysis, ensuring the full utilization of fiber particle resources.

[0024] In this embodiment, the mixing component 81 includes a first spur gear 811 fixedly connected to the output shaft of the first motor 3. An upper toothed ring 812 is meshed and connected to the outside of the first spur gear 811. The inner wall of the upper toothed ring 812 is fixedly connected to the filter plate 6. A limiting plate 813 is fixedly connected to the outside of the upper toothed ring 812. The outside of the limiting plate 813 is rotatably connected to the inside of the buffer tank 2. Two groups of symmetric fixed toothed plates 814 are fixedly connected to the inner wall of the upper toothed ring 812. A fixing frame 815 is fixedly connected to the side of the two groups of fixed toothed plates 814 close to each other. The fixing frame 815 is fixedly connected to the upper end of the first auger rod 4. Sliding grooves are formed on both sides of the fixed toothed plate 814. A first bracket 816 is slidably connected to the outside of the fixed toothed plate 814. A second motor 817 is installed at the rear end of the fixed toothed plate 814. The output shaft of the second motor 817 penetrates through the first bracket 816. A second spur gear 819 is fixedly connected to the outside of the output shaft of the second motor 817. The outside of the second spur gear 819 is meshed and connected to the fixed toothed plate 814.

[0025] Specifically, the first spur gear 811 is connected to the output shaft of the first motor 3. Through meshing with the upper toothed ring 812, the power of the first motor 3 is transmitted to the upper toothed ring 812, driving the upper toothed ring 812 to rotate self. The inner wall of the upper toothed ring 812 is fixed to the filter plate 6, driving the filter plate 6 to rotate synchronously, generating a centrifugal force to screen the pyrolyzed fiber particles; the outer limiting plate 813 ensures the stability and accuracy of the rotation of the upper toothed ring 812, enabling it to rotate along a predetermined trajectory in the buffer tank 2. The fixed toothed plates 814 are fixed to the inner wall of the upper toothed ring 812 and rotate with the upper toothed ring 812. The upper end of the first auger rod 4 is driven to rotate through the fixing frame 815, realizing the rotation of the first auger rod 4, thereby conveying the fiber particles; at the same time, the sliding grooves on both sides thereof provide a sliding track for the first bracket 816. The second motor 817 drives the first bracket 816 to translate on the sliding grooves outside the fixed toothed plate 814 through the second spur gear 819 on the output shaft, enabling it to move to the position of the large fiber particles on the filter plate 6, preparing for subsequent spraying of the catalyst.

[0026] In this embodiment, a catalyst tank 818 is fixedly connected to the upper end of the first bracket 816. A stirring rod 8112 is rotatably connected to the inside of the catalyst tank 818. A second bevel gear 8111 is fixedly connected to the lower end of the stirring rod 8112. A first bevel gear 8110 is meshed and connected to the outside of the second bevel gear 8111. The inside of the first bevel gear 8110 is fixedly connected to the output shaft of the second motor 817. An L-shaped discharge pipe 8113 is fixedly connected to the lower end of the catalyst tank 818. One end of the L-shaped discharge pipe 8113 is fixedly connected to a piezoelectric ultrasonic atomizing nozzle 8114 through a hose.

[0027] Specifically, the first support 816 supports the catalyst tank 818, enabling it to move to the designated position along with the first support 816. The output shaft of the second motor 817 drives the first bevel gear 8110 to rotate. Through meshing with the second bevel gear 8111, the stirring rod 8112 rotates inside the catalyst tank 818 to stir the catalyst, preventing the catalyst from depositing and ensuring the uniformity of the catalyst. The uniformly mixed catalyst is transported to the piezoelectric ultrasonic atomizing nozzle 8114 through the L-shaped discharge pipe 8113 and the hose. The nozzle atomizes the catalyst and sprays it onto the large fiber particles on the filter plate 6 to soften the fiber surface layer and wash away the clogging substances in the filter holes.

[0028] In this embodiment, the crushing component 82 includes a second support 821 fixedly connected to the first support 816. An electric telescopic rod 822 is installed at the rear end of the second support 821. The output shaft of the electric telescopic rod 822 is fixedly connected to the piezoelectric ultrasonic atomizing nozzle 8114. A first sleeve 824 is rotatably connected to the inner side of the second support 821. A material discharge groove is formed on the outer side of the first sleeve 824. A third spur gear 8211 is fixedly connected to the front end of the first sleeve 824. The inner side of the third spur gear 8211 is rotatably connected to the L-shaped discharge pipe 8113. A first chain 8212 is rotatably connected to the outer side of the third spur gear 8211. A fourth spur gear 8213 is rotatably connected to the inner side of the first chain 8212. The rear end of the fourth spur gear 8213 is fixedly connected to the output shaft of the second motor 817.

[0029] Specifically, the second support 821 is fixed on the first support 816, providing installation support for other components of the crushing component 82. The electric telescopic rod 822 is telescopic, and its output shaft is connected to the piezoelectric ultrasonic atomizing nozzle 8114. By adjusting the position of the nozzle through telescoping, it is ensured that the catalyst can be evenly sprayed onto different areas of the filter plate 6. The output shaft of the second motor 817 drives the fourth spur gear 8213 to rotate, driving the third spur gear 8211 to rotate through the first chain 8212, and then rotating the first sleeve 824. The material discharge groove on the outer side of the first sleeve 824 is used to guide the fiber particles. At the same time, its rotation drives the related components fixed on the outer side to perform crushing treatment on the fiber particles.

[0030] In this embodiment, a CCD camera 823 is rotatably connected to one side of the second support 821 through a mounting block. A third motor 8210 is installed at the front end of the mounting block. The output shaft of the third motor 8210 is fixedly connected to the CCD camera 823.

[0031] Specifically, the third motor 8210 drives the CCD camera 823 to rotate, enabling the CCD camera 823 to scan the filter plate 6 within a 180° swing range. Through an image recognition algorithm, the aggregation area of the large fiber particles on the filter plate 6 is located, and the coordinate signal is fed back to the PLC system to control components such as the first support 816 to move to the corresponding position for processing.

[0032] In this embodiment, a plurality of groups of symmetrically arranged second sleeves 825 are fixedly connected to the outer side of the first sleeve 824. A fixed rotating shaft 826 is slidably connected to the inner sides of the two second sleeves 825. The fixed rotating shaft 826 is designed in a C shape. A material pressing shaft 829 is fixedly connected to the lateral outer side of the fixed rotating shaft 826. A plurality of spring telescopic rods 828 are installed on the outer side of the material pressing shaft 829. The other ends of the spring telescopic rods 828 are fixedly connected to silicon carbide scraping blades. A first spring 827 is arranged at the upper end of the fixed rotating shaft 826. One end of the first spring 827 is fixedly connected to the second sleeve 825, and the other end of the first spring 827 is fixedly connected to the fixed rotating shaft 826.

[0033] Specifically, when the first sleeve 824 rotates, it drives the second sleeve 825 to rotate. The second sleeve 825 provides a sliding track for the fixed rotating shaft 826. Under the action of the first spring 827, the fixed rotating shaft 826 can elastically fit the filter plate 6. When the material pressing shaft 829 contacts large fiber particles on the filter plate 6, the spring telescopic rods 828 are compressed, increasing the crushing force. The material pressing shaft 829 is used to roll and crush the fiber particles. The silicon carbide scraping blades at the other ends of the spring telescopic rods 828 simultaneously dredge the filter holes of the filter plate 6 during the rolling and crushing process, preventing the filter holes from being blocked and ensuring the screening effect.

[0034] In this embodiment, the crushing mechanism 9 includes a pressure shaft 91. One end of the pressure shaft 91 is rotatably connected to the upper tooth ring 812 through a rotating shaft. A second spring 913 is arranged on the outer side of the pressure shaft 91. The lower end of the second spring 913 is fixedly connected to the pressure shaft 91, and the upper end of the second spring 913 is fixedly connected to the upper tooth ring 812. A first mounting tube 93 is fixedly connected to the outer side of the pressure shaft 91 near one end. A fourth motor 94 is installed at the front end of the first mounting tube 93. The output shaft of the fourth motor 94 is fixedly connected to a fifth spur gear 95. The fifth spur gear 95 is rotatably connected to the inner side of the first mounting tube 93. A second chain 96 is rotatably connected to the outer side of the fifth spur gear 95. A plurality of sixth spur gears 97 are rotatably connected to the inner side of the second chain 96. Crushing plates 98 are fixedly connected to both ends of the sixth spur gears 97. A second mounting tube 910 is fixedly connected to the outer side of the pressure shaft 91 near the other end. The second mounting tube 910 is designed in a C shape. Two symmetrically arranged seventh spur gears 911 are rotatably connected to the inner side of the second mounting tube 910. A fourth chain 912 is rotatably connected to the outer sides of the two seventh spur gears 911. A metal friction surface is arranged on the outer side of the fourth chain 912. A third chain 99 is rotatably connected to the outer side of one of the two discharging mechanisms 11. The inner side of the third chain 99 is rotatably connected to the fifth spur gear 95. A drop ring 92 is rotatably connected to the outer side of the pressure shaft 91. The inner side of the drop ring 92 is fixedly connected to the pyrolysis tube 5.

[0035] Specifically, the pressure shaft 91 is rotationally connected to the upper toothed ring 812 and rotates with the upper toothed ring 812. When the pressure shaft 91 contacts the 10-mm height difference structure of the drop ring 92, the second spring 913 is compressed, causing the pressure shaft 91 to drive the first mounting tube 93 and the second mounting tube 910 to press down by 5 mm, driving the crushing plate 98 close to the lower side of the filter plate 6. The fourth motor 94 drives the fifth spur gear 95 to rotate, driving multiple groups of sixth spur gears 97 to rotate through the second chain 96, causing the crushing plates 98 fixed at both ends of the sixth spur gears 97 to form an interleaved shearing motion to crush the fiber particles caked due to high temperature below the filter plate 6. The fifth spur gear 95 drives the seventh spur gear 911 to rotate through the third chain 99, causing the fourth chain 912 to rotate inside the second mounting tube 910. The metal friction surface on the outer side of the fourth chain 912 reciprocally wipes the surface of the heating plate 7 to remove the adhered coke, ensuring the stable preheating efficiency of the heating plate 7.

[0036] In this embodiment, the discharging mechanism 11 includes a fifth chain 111. The inner side of the fifth chain 111 is rotationally connected to a ninth spur gear 12, and the inner side of the ninth spur gear 12 is fixedly connected to the output shaft of the first motor 3. The inner side of the fifth chain 111 is rotationally connected to an eighth spur gear 112, and a discharging pipe 114 is fixedly connected to the front end of the eighth spur gear 112. The outer side of the discharging pipe 114 is rotationally connected to a second auger rod 113, and the upper end of the second auger rod 113 is fixedly connected to the solenoid valve 10.

[0037] Specifically, the output shaft of the first motor 3 drives the ninth spur gear 12 to rotate, driving the eighth spur gear 112 to rotate through the fifth chain 111, causing the discharging pipe 114 to rotate. The second auger rod 113 on the outer side of the discharging pipe 114 forms a rotational fit with the discharging pipe 114. After pyrolysis is completed, the solenoid valve 10 is opened, and the residual particles reversely conveyed by the first auger rod 4 fall into the second auger rod 113. The second auger rod 113 rotates to helically extrude, collect, and discharge the particle residues, realizing the treatment of the residues.

[0038] In this embodiment, the collection mechanism 13 includes a sixth chain 131 meshing with the ninth spur gear 12. The inner side of the sixth chain 131 is rotationally connected to a tenth spur gear 132, and an air extractor fan 133 is fixedly connected to the front end of the tenth spur gear 132. A collection net 134 is fixedly connected to the rear end of the housing of the air extractor fan 133.

[0039] Specifically, the output shaft of the first motor 3 drives the ninth spur gear 12 to rotate, drives the tenth spur gear 132 to rotate through the sixth chain 131, and enables the exhaust fan 133 to operate. The operation of the exhaust fan 133 generates an air flow, forms an eddy current field near the collection net 134, adsorbs the dust in the dust-containing gas generated by pyrolysis onto the collection net 134. At the same time, the air flow disturbance controls the temperature uniformity error in the buffer tank 2, avoids the generation of condensed water caused by temperature difference, ensures that the pyrolysis reaction is carried out in a dry environment, and improves the purity of the recovered gas.

[0040] Working principle: During use, fiber particles crushed to 5 - 10 mm are put into the buffer tank 2. The heating plate 7 is preheated at 150 - 200 °C for 20 minutes to evaporate the residual moisture inside the particles through radiation heating. The preheated particles are concentrated at the bottom of the buffer tank due to gravity, providing a stable material source for subsequent conveying. The first motor 3 is started, and its output shaft drives the first spur gear 811 to rotate clockwise through key connection. The upper tooth ring 812 guided by the limit plate 813 rotates synchronously under the meshing drive, and the upper tooth ring 812 drives the fixed frame 815 to rotate through the fixed tooth plate 814, thereby driving the first auger rod 4 to uniformly convey the bottom particles to the pyrolysis tube 5. The pyrolysis tube 5 starts the electric heating module synchronously and heats up to 400 - 550 °C under nitrogen protection. The particles are initially pyrolyzed under the push of the spiral blades. Since some of the limited fiber particles are not fully crushed and cannot be fully pyrolyzed, the pyrolyzed material falls from the top outlet of the first auger rod 4 to the filter plate 6, and centrifugal force is generated with the synchronous rotation of the upper tooth ring 812. Small particles with a particle size ≤ 2 mm penetrate the filter holes with a pore diameter of 2.5 mm of the filter plate 6 and fall to the bottom of the buffer tank 2 for secondary pyrolysis. Large particles with a size ≥ 2.5 mm are retained on the surface of the filter plate due to centrifugal force. At this time, the third motor 8210 drives the CCD camera 823 to scan the filter plate within a swing range of 180°, locates the aggregation area of large particles through an image recognition algorithm, generates coordinate signals and feeds them back to the PLC system. The second motor 817 is started synchronously, and its output shaft drives the first bracket 816 to translate along the chute of the fixed tooth plate 814 to the target position through the second spur gear 819. At the same time, the first bevel gear 8110 at the end of the motor shaft drives the second bevel gear 8111 to stir the powder-liquid catalyst in the catalyst tank 818 to prevent deposition. The uniformly mixed catalyst is atomized and sprayed by the piezoelectric ultrasonic atomizing nozzle 8114 through the L-shaped discharge pipe 8113, and the spraying range covers 80% of the surface of the filter plate, softening the fiber surface layer and flushing the blockage in the filter holes. The second motor 817 drives the third spur gear 8211 through the fourth spur gear 8213 - first chain 8212 transmission group, driving the first sleeve 824 to rotate. The second sleeve 825 fixed outside the sleeve follows the movement, so that the C-shaped fixed rotating shaft 826 elastically fits the filter plate under the action of the first spring 827. When the pressing shaft 829 contacts the large particles, the spring telescopic rod 828 compresses to increase the crushing force, and the pressing shaft 829 is used to achieve rolling and crushing. At the same time, the silicon carbide scraping blade of the spring telescopic rod 828 synchronously dredges the filter holes. The electric telescopic rod 822 reciprocates the spray head with a stroke of 20 mm to ensure uniform coverage of the catalyst. The crushed particles with a particle size ≤ 2 mm fall through the filter holes, are mixed with the bottom material, and are sent into the pyrolysis tube 5 again by the first auger rod 4, forming a "pyrolysis - screening - catalytic crushing - reflux" closed loop; When the upper tooth ring 812 rotates, it drives the pressure shaft 91 to rotate. The pressure shaft 91 drives the first mounting tube 93 and the second mounting tube 910 to rotate. When the pressure shaft 91 contacts the 10-mm height difference structure of the drop ring 92, the second spring 913 compresses, causing the mounting tube group to press down by 5 mm, driving the crushing plate 98 close to the lower side of the filter plate 6. The fourth motor 94 drives the fifth spur gear 95, and through the second chain 96, drives the sixth spur gear 97 to make the six groups of crushing plates 98 form an alternating shear, crushing the particles agglomerated due to high temperature. At the same time, the fifth spur gear 95 drives the seventh spur gear 911 through the third chain 99, causing the fourth chain 912 with a metal friction surface on its surface to wipe the surface of the heating plate 7 reciprocally, removing the adhered coking substances and ensuring the stability of the preheating efficiency; When the fiber particles pyrolyze, recyclable gas is generated. At this time, it can be recycled through the gas recovery device. However, the gas will contain fine particles mixed with the gas, affecting the purity of the recycled gas. When the temperature of the dust-containing gas generated by pyrolysis rises from 150 to 200 °C, the first motor 3 drives the sixth chain 131 through the ninth spur gear 12 to drive the tenth spur gear to make the air extractor 133 operate, forming an eddy current field near the collection net 134. Dust with a particle size ≤ 5 μm is adsorbed onto the net surface. At the same time, the air flow disturbance controls the temperature uniformity error in the buffer tank within ±5 °C, avoiding the generation of condensed water due to temperature difference and ensuring that the pyrolysis reaction proceeds in a dry environment; When the CCD camera 823 fails to detect large particles on the surface of the filter plate 6 for 5 consecutive minutes and the material flow rate at the outlet of the pyrolysis tube 5 is lower than 10% of the rated value, it is determined that the pyrolysis is completed. The solenoid valve 10 is opened, and the first motor 3 rotates in the reverse direction. The first auger rod 4 conveys the residual particles in the pyrolysis tube 5 in the reverse direction. The fourth chain 912 synchronously increases the cleaning frequency, causing the dropped particles to fall into the discharging mechanism 11 through the solenoid valve 10. The ninth spur gear 12 drives the eighth spur gear 112 through the fifth chain 111, causing the second auger rod 113 to rotate in the discharging pipe 114, realizing the spiral extrusion collection of the residues.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pyrolysis device for composite Sorona fiber, comprising a base (1), characterized in that: A buffer tank (2) is fixedly connected to the upper end of the base (1). A first motor (3) is installed on the outer side of the buffer tank (2). A first auger rod (4) is rotatably connected to the inner side of the buffer tank (2). A pyrolysis tube (5) is rotatably connected to the outer side of the first auger rod (4). A heat insulation and heat preservation layer is arranged on the outer wall of the pyrolysis tube (5). The lower end of the pyrolysis tube (5) is fixedly connected to the base (1). A filter plate (6) is rotatably connected to the outer side of the pyrolysis tube (5). Polytetrafluoroethylene is arranged on the surface of the filter plate (6). A heating plate (7) is installed on the inner wall of the buffer tank (2). A reflux mechanism (8) for limiting and refluxing and repeatedly pyrolyzing fiber particles is installed on the inner side of the buffer tank (2). A crushing mechanism (9) for secondarily crushing the limited fiber particles is installed below the filter plate (6) on the inner side of the buffer tank (2). A solenoid valve (10) is installed at the lower end of the buffer tank (2). A discharging mechanism (11) for discharging fiber particles is installed at the lower end of the solenoid valve (10). A collecting mechanism (13) for recovering fine fiber particles is installed on the inner side of the buffer tank (2).

2. The pyrolysis device of a composite Sorona fiber according to claim 1, wherein: The reflux mechanism (8) includes a mixing component (81) for comprehensively spraying a catalyst on fiber particles, and the reflux mechanism (8) further includes a material crushing component (82) for crushing large fiber particles.

3. The pyrolysis device of a composite Sorona fiber according to claim 2, characterized in that: The mixing component (81) includes a first spur gear (811) fixedly connected to the output shaft of the first motor (3). An upper toothed ring (812) is meshed and connected to the outer side of the first spur gear (811). The inner wall of the upper toothed ring (812) is fixedly connected to the filter plate (6). A limiting plate (813) is fixedly connected to the outer side of the upper toothed ring (812). The outer side of the limiting plate (813) is rotatably connected to the inner side of the buffer tank (2). Two groups of symmetric fixed toothed plates (814) are fixedly connected to the inner wall of the upper toothed ring (812). A fixed frame (815) is fixedly connected to the side where the two groups of fixed toothed plates (814) are close to each other. The fixed frame (815) is fixedly connected to the upper end of the first auger rod (4). Sliding grooves are formed on both sides of the fixed toothed plate (814). A first bracket (816) is slidably connected to the outer side of the fixed toothed plate (814). A second motor (817) is installed at the rear end of the fixed toothed plate (814). The output shaft of the second motor (817) penetrates through the first bracket (816). A second spur gear (819) is fixedly connected to the outer side of the output shaft of the second motor (817). The outer side of the second spur gear (819) is meshed and connected to the fixed toothed plate (814).

4. A pyrolysis device for a composite Sorona fiber according to claim 3, characterized in that: The upper end of the first support (816) is fixedly connected with a catalyst tank (818). A stirring rod (8112) is rotatably connected inside the catalyst tank (818). The lower end of the stirring rod (8112) is fixedly connected with a second bevel gear (8111). A first bevel gear (8110) is meshed and connected to the outside of the second bevel gear (8111). The inside of the first bevel gear (8110) is fixedly connected with the output shaft of a second motor (817). The lower end of the catalyst tank (818) is fixedly connected with an L-shaped discharge pipe (8113). One end of the L-shaped discharge pipe (8113) is fixedly connected with a piezoelectric ultrasonic atomizing nozzle (8114) through a hose.

5. The pyrolysis device of a composite Sorona fiber according to claim 2, characterized in that: The crushing component (82) includes a second support (821) fixedly connected with the first support (816). An electric telescopic rod (822) is installed at the rear end of the second support (821). The output shaft of the electric telescopic rod (822) is fixedly connected with the piezoelectric ultrasonic atomizing nozzle (8114). A first sleeve (824) is rotatably connected inside the second support (821). A material discharge groove is formed on the outside of the first sleeve (824). The front end of the first sleeve (824) is fixedly connected with a third spur gear (8211). The inside of the third spur gear (8211) is rotatably connected with the L-shaped discharge pipe (8113). A first chain (8212) is rotatably connected to the outside of the third spur gear (8211). A fourth spur gear (8213) is rotatably connected to the inside of the first chain (8212). The rear end of the fourth spur gear (8213) is fixedly connected with the output shaft of the second motor (817).

6. The pyrolysis device of a composite Sorona fiber according to claim 5, characterized in that: A CCD camera (823) is rotatably connected to one side of the second support (821) through a mounting block. A third motor (8210) is installed at the front end of the mounting block. The output shaft of the third motor (8210) is fixedly connected with the CCD camera (823).

7. A pyrolysis device for a composite Sorona fiber according to claim 5, characterized in that: A plurality of groups of symmetric second sleeves (825) are fixedly connected to the outside of the first sleeve (824). A fixed rotating shaft (826) is slidably connected to the inside of the two second sleeves (825). The fixed rotating shaft (826) is designed in a C shape. A pressing shaft (829) is fixedly connected to the lateral outside of the fixed rotating shaft (826). A plurality of spring telescopic rods (828) are installed on the outside of the pressing shaft (829). The other end of each spring telescopic rod (828) is fixedly connected with a silicon carbide scraping blade. A first spring (827) is arranged at the upper end of the fixed rotating shaft (826). One end of the first spring (827) is fixedly connected with the second sleeve (825), and the other end of the first spring (827) is fixedly connected with the fixed rotating shaft (826).

8. The pyrolysis device of a composite Sorona fiber according to claim 1, characterized in that: The crushing mechanism (9) includes a pressure shaft (91). One end of the pressure shaft (91) is rotatably connected to the upper tooth ring (812) through a rotating shaft. A second spring (913) is arranged outside the pressure shaft (91). The lower end of the second spring (913) is fixedly connected to the pressure shaft (91), and the upper end of the second spring (913) is fixedly connected to the upper tooth ring (812). A first mounting pipe (93) is fixedly connected to the outside of the pressure shaft (91) near one end. A fourth motor (94) is installed at the front end of the first mounting pipe (93). The output shaft of the fourth motor (94) is fixedly connected to a fifth spur gear (95). The fifth spur gear (95) is rotatably connected inside the first mounting pipe (93). A second chain (96) is rotatably connected to the outside of the fifth spur gear (95). A plurality of groups of sixth spur gears (97) are rotatably connected to the inside of the second chain (96). Scraping plates (98) are fixedly connected to both ends of the sixth spur gear (97). A second mounting pipe (910) is fixedly connected to the outside of the pressure shaft (91) near the other end. The second mounting pipe (910) is designed in a C shape. Two symmetrically arranged seventh spur gears (911) are rotatably connected inside the second mounting pipe (910). A fourth chain (912) is rotatably connected to the outside of the two seventh spur gears (911). A metal friction surface is arranged on the outside of the fourth chain (912). A third chain (99) is rotatably connected to the outside of one of the two discharging mechanisms (11). The inside of the third chain (99) is rotatably connected to the fifth spur gear (95). A drop ring (92) is rotatably connected to the outside of the pressure shaft (91). The inside of the drop ring (92) is fixedly connected to the pyrolysis tube (5).

9. The pyrolysis device of a composite Sorona fiber according to claim 1, characterized in that: The discharging mechanism (11) includes a fifth chain (111). A ninth spur gear (12) is rotatably connected to the inside of the fifth chain (111). The inside of the ninth spur gear (12) is fixedly connected to the output shaft of the first motor (3). An eighth spur gear (112) is rotatably connected to the inside of the fifth chain (111). A discharging pipe (114) is fixedly connected to the front end of the eighth spur gear (112). A second auger rod (113) is rotatably connected to the outside of the discharging pipe (114). The upper end of the second auger rod (113) is fixedly connected to the solenoid valve (10).

10. The pyrolysis device of a composite Sorona fiber according to claim 1, characterized in that: The collecting mechanism (13) includes a sixth chain (131) meshing with the ninth spur gear (12). A tenth spur gear (132) is rotatably connected to the inside of the sixth chain (131). An air extractor fan (133) is fixedly connected to the front end of the tenth spur gear (132). A collecting net (134) is fixedly connected to the rear end of the housing of the air extractor fan (133).

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