Integrated waste plastic pyrolysis feeding device

Abstract

The application relates to the technical field of waste plastic pyrolysis, in particular to an integrated waste plastic pyrolysis feeding device, which comprises a feeding hopper, a crushing assembly is arranged at the upper portion of the feeding hopper, a baffle is arranged below the crushing assembly, one end of the baffle is rotationally connected with the inner wall of the feeding hopper through a rotating shaft, a reset assembly is arranged between the rotating shaft and the feeding hopper, a resistance mechanism is arranged between the other end of the baffle and the feeding hopper, and the inner side of the feeding hopper, away from the side of the rotating shaft, is arranged as an arc surface.The sliding cooperation of the baffle and the arc surface of the feeding hopper, the multiple sealing design of the two side sealing strips and the upper and lower end sealing strips, the combination of the polytetrafluoroethylene anti-sticking coating of the inner wall of the feeding hopper, effective blocking of the pyrolysis combustible gas leakage channel, elimination of the safety hazards caused by gas leakage, avoidance of energy waste, satisfaction of the inert atmosphere requirement of the pyrolysis reaction, and guarantee of the sealing property and stability of the pyrolysis process.

Description

Technical Field

[0001] This application relates to the technical field of waste plastic pyrolysis, and in particular to an integrated waste plastic pyrolysis feeding device. Background Technology

[0002] With the continuous growth of global plastic consumption, the environmental pollution caused by waste plastics is becoming increasingly serious, becoming one of the key challenges restricting ecological sustainable development. Waste plastics are difficult to degrade naturally, and long-term accumulation will occupy land resources, pollute soil and water bodies, and even harm ecosystems and human health through the food chain. Against this backdrop, waste plastic resource recycling technologies have received widespread attention. Among them, pyrolysis technology, which can convert waste plastics into high-value products such as fuel oil and gas, has become one of the mainstream technical routes for waste plastic treatment due to its combination of environmental protection and economy.

[0003] A search revealed Chinese Patent Publication No. CN222250596U, which discloses a continuous feeding device for waste plastic pyrolysis. A detachable screen is added to the receiving hopper, with a motor at the bottom. The motor drives a cutting blade to rotate at high speed, cutting and crushing large pieces of waste plastic in the hopper. This prevents large pieces of waste plastic from getting stuck in the screw feeder at the bottom of the hopper. Furthermore, the smaller pieces of waste plastic, after being fed into the pyrolysis device, result in smaller gaps between the plastics and faster heat transfer, leading to faster pyrolysis. After pyrolysis, the screen can be removed from the receiving hopper, and the cutting blade can be detached from the motor's drive shaft for easy cleaning.

[0004] Existing feeding devices are not properly sealed, leading to leakage of flammable gases generated during pyrolysis, causing safety hazards and energy waste. Furthermore, most baffles lack adaptive adjustment functions, failing to flexibly adjust the opening and closing resistance according to the amount of material accumulated. This can easily result in problems such as rapid feeding causing sudden changes in reactor pressure or insufficient production capacity due to slow feeding. Therefore, developing an integrated waste plastic pyrolysis feeding device that combines adaptive sealing and flexible adjustment to solve the problems existing in the current equipment is of great significance for promoting the industrial upgrading of waste plastic pyrolysis technology. Utility Model Content

[0005] To address the problem of leaks of combustible gases generated during pyrolysis due to inadequate sealing, which could lead to safety hazards and energy waste, this application provides an integrated waste plastic pyrolysis feeding device.

[0006] This application provides an integrated waste plastic pyrolysis feeding device, which adopts the following technical solution: it includes a feeding hopper, a crushing component is provided on the upper part of the feeding hopper, a baffle is provided below the crushing component, one end of the baffle is rotatably connected to the inner wall of the feeding hopper through a rotating shaft, a reset component is provided between the rotating shaft and the feeding hopper, a resistance mechanism is provided between the other end of the baffle and the feeding hopper, and the inner side of the feeding hopper away from the rotating shaft is provided as an arc-shaped surface, and the baffle is slidably disposed with the arc-shaped surface.

[0007] Optionally, the resistance mechanism includes a first magnet box, which is fixedly mounted on the baffle. A groove is provided on the feed hopper at the corresponding position of the first magnet box, and a second magnet box is provided inside the groove. An adjusting element is provided between the second magnet box and the feed hopper.

[0008] Optionally, multiple magnet boxes are provided, and the multiple magnet boxes are evenly distributed. A groove is provided on the baffle at the corresponding position of each magnet box, and the magnet box is fixedly installed inside the groove.

[0009] Optionally, the adjusting component includes a screw, which is rotatably mounted on the second magnet box, with the other end of the screw passing through the feed hopper and the screw being threadedly connected to the feed hopper.

[0010] Optionally, the reset assembly includes a torsion spring, which is sleeved on the rotating shaft. One end of the torsion spring is fixedly mounted on the rotating shaft, and the other end of the torsion spring is mounted on the feed hopper. A housing is sleeved on the torsion spring, and the housing is fixedly mounted on the feed hopper.

[0011] Optionally, a sealing strip is fixedly installed on both sides of the baffle, and the sealing strip abuts against the side wall of the feed hopper. A vertical plate 1 and a vertical plate 2 are provided above both ends of the baffle. The upper ends of the vertical plate 1 and the vertical plate 2 are fixedly connected to the feed hopper. A sealing strip 2 is fixedly installed at the lower ends of the vertical plate 1 and the vertical plate 2, and the upper end of the sealing strip 2 abuts against the upper end of the baffle.

[0012] Optionally, the crushing assembly includes two crushing rollers, which are rotatably mounted on the feed hopper. The power end of each crushing roller is provided with a drive source, which is mounted on the feed hopper.

[0013] Optionally, the feed hopper is made of high-temperature and corrosion-resistant steel plate welded together, and its inner wall is coated with polytetrafluoroethylene anti-stick coating to prevent molten material from adhering during the pyrolysis of waste plastic; the baffle is an arc-shaped steel plate structure, and the width of the baffle is adapted to the internal width of the feed hopper to ensure no side leakage gaps; the feed hopper is provided with mounting holes at its four corners.

[0014] In summary, this application includes the following beneficial technical effects: 1. This utility model effectively blocks the leakage channel of pyrolysis combustible gas by means of sliding fit between the baffle and the arc surface of the feed hopper, multiple sealing design of sealing strip one on both sides and sealing strip two at the top and bottom ends, combined with polytetrafluoroethylene anti-stick coating on the inner wall of the feed hopper. This not only eliminates the safety hazards caused by gas leakage, but also avoids energy waste, while meeting the inert atmosphere requirements of the pyrolysis reaction and ensuring the sealing and stability of the pyrolysis process.

[0015] 2. This utility model utilizes the magnetic cooperation of magnet box one and magnet box two, a screw adjustment component, and a torsion spring reset assembly to flexibly adjust the opening and closing resistance of the baffle according to the material accumulation, thereby achieving adaptive control of the feeding rate. This avoids problems such as sudden pressure changes in the reactor due to excessively fast feeding or insufficient production capacity due to excessively slow feeding. At the same time, the integrated crushing component and feeding structure allow waste plastics to be crushed before feeding, improving the uniformity of feeding and further ensuring the continuity and efficiency of the pyrolysis reaction, thus helping to improve the stability of production capacity and the quality of pyrolysis products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a schematic diagram of the inner side of the feed hopper in an embodiment of this application; Figure 3 This is a schematic diagram of the groove position in an embodiment of this application; Figure 4 This is an embodiment of the present application. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the baffle structure in an embodiment of this application.

[0017] Reference numerals in the attached drawings: 1. Feed hopper; 2. Crushing roller; 3. Baffle; 4. Rotating shaft; 5. Torsion spring; 6. Outer shell; 7. Magnet box one; 8. Groove; 9. Magnet box two; 10. Slide groove; 11. Screw; 12. Arc-shaped surface; 13. Sealing strip one; 14. Vertical plate one; 15. Vertical plate two; 16. Sealing strip two; 17. Mounting hole. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0019] This application discloses an integrated waste plastic pyrolysis feeding device. For example... Figure 1 , Figure 2As shown, the device includes a feeding hopper 1, with a crushing assembly on the upper part of the feeding hopper 1. The crushing assembly includes two crushing rollers 2, which are rotatably mounted on the feeding hopper 1. The power end of the crushing rollers 2 is equipped with a drive source, which is also mounted on the feeding hopper 1. The crushing rollers 2 are made of Cr12MoV wear-resistant alloy steel, and their surfaces are provided with staggered serrated grooves. The two crushing rollers 2 are rotatably mounted in bearing seats on both sides of the feeding hopper 1, and the bearings are high-temperature resistant ceramic bearings. The drive source is a variable frequency geared motor, and the motor output shaft is connected to the crushing rollers 2 through a coupling, driving the two crushing rollers 2 to rotate relative to each other.

[0020] See Figure 3 , Figure 4 As shown, a baffle 3 is provided below the crushing component. The baffle 3 is made of 304 stainless steel. Sealing strip 13 is fixedly installed on both sides of the baffle 3. Sealing strip 13 is made of high temperature resistant silicone. Sealing strip 13 abuts against the side wall of the feed hopper 1. Vertical plate 14 and vertical plate 25 are provided above both ends of the baffle 3. The upper ends of vertical plate 14 and vertical plate 25 are fixedly connected to the feed hopper 1. Vertical plate 14 and vertical plate 25 are made of steel plate of the same material as the feed hopper 1. The upper ends are welded to the feed hopper 1. Sealing strip 26 is fixedly installed at the lower ends of vertical plate 14 and vertical plate 25. Sealing strip 216 is a lip-shaped silicone strip and is fixed by riveting.

[0021] See Figure 3 , Figure 4 , Figure 5 As shown, the upper end of the sealing strip 16 abuts against the upper end of the baffle 3. One end of the baffle 3 is rotatably connected to the inner wall of the feed hopper 1 through the rotating shaft 4. The rotating shaft 4 is made of 45 steel and heat treated. Both ends are positioned by deep groove ball bearings. A reset assembly is provided between the rotating shaft 4 and the feed hopper 1. The reset assembly includes a torsion spring 5. The torsion spring 5 is made of high temperature resistant stainless steel. The torsion spring 5 is sleeved on the rotating shaft 4. One end of the torsion spring 5 is fixedly installed on the rotating shaft 4, and the other end of the torsion spring 5 is installed on the feed hopper 1.

[0022] See Figure 2 , Figure 3 , Figure 4 As shown, a torsion spring 5 is fitted with a housing 6, which is fixedly installed on the feed hopper 1. A resistance mechanism is provided between the other end of the baffle 3 and the feed hopper 1. The resistance mechanism includes a magnet box 7, which contains neodymium iron boron magnets. The magnet box 7 is fixedly installed on the baffle 3. The feed hopper 1 is made of 316L high-temperature and corrosion-resistant steel plate and its inner wall is coated with a polytetrafluoroethylene anti-stick coating to prevent molten materials from adhering during the pyrolysis of waste plastics. The baffle 3 is an arc-shaped steel plate structure, and the width of the baffle 3 is adapted to the internal width of the feed hopper 1 to ensure no side leakage gaps.

[0023] See Figure 2 , Figure 3 , Figure 4 As shown, mounting holes 17 are provided at the four corners of the feed hopper 1. Multiple magnet boxes 7 are provided and evenly distributed. The baffle 3 at the corresponding position of the magnet box 7 is provided with a groove 8. The magnet box 7 is fixedly installed in the groove 8 by hexagonal bolts. The feed hopper 1 at the corresponding position of the magnet box 7 is provided with a sliding groove 10. The inner side of the sliding groove 10 is provided with a magnet box 9. The magnet box 9 contains neodymium iron boron magnets of the same grade, which are opposite poles to magnet box 7.

[0024] See Figure 3 , Figure 4 As shown, an adjusting component is provided between the magnet box 2 9 and the feed hopper 1. The adjusting component includes a screw 11, which is rotatably mounted on the magnet box 2 9. The other end of the screw 11 passes through the feed hopper 1 and is threadedly connected to the feed hopper 1. The inner side of the feed hopper 1 away from the rotating shaft 4 is set as an arc-shaped surface 12. The baffle 3 is slidably set with the arc-shaped surface 12, and the arc-shaped surface 12 is coaxial with the rotating shaft 4.

[0025] The implementation principle of the integrated waste plastic pyrolysis feeding device in this application embodiment is as follows: The device is fixed to the front end of the pyrolysis system through the mounting hole 17 to ensure precise docking with the feed port of the reactor; the drive source of the crushing component is started, which drives the two crushing rollers 2 to rotate relative to each other, and the blocky and irregular waste plastic is put into the feed hopper 1. During the falling process, the material is crushed by the meshing and squeezing of the two crushing rollers 2 and broken into fine particles with uniform particle size. The crushed material falls to the upper surface of the baffle 3. At this time, under the pre-tightening force of the torsion spring 5, the baffle 3 and the arc surface 12 on the inner side of the feed hopper 1 maintain a sliding contact state, forming a multi-seal structure to block the leakage channel of high temperature flammable gas in the reactor; as the material continues to accumulate on the baffle 3, the gravity of the material gradually increases. When the gravity exceeds the magnetic attraction force of the first magnet box 7 and the second magnet box 9 and the elastic resistance of the torsion spring 5, the baffle 3 rotates downward around the rotating shaft 4 and slides along the arc surface 12 of the feed hopper 1. The feeding channel is opened and the crushed material falls evenly into the reactor below. If the feed resistance needs to be adjusted according to the pyrolysis reaction rate, the screw 11 can be rotated. When rotating, the magnet box 2 9 moves back and forth along the slide 10, changing the relative distance with the multiple evenly distributed magnet boxes 1 7 on the baffle 3, thereby adjusting the magnitude of the magnetic attraction force. The greater the magnetic force, the greater the material accumulation gravity required for the baffle 3 to open and close, and the slower the feed rate; conversely, the feed rate is accelerated, thus achieving flexible control of the feed rate. As the material on baffle 3 gradually falls into the reactor, the weight of the material decreases. When the elastic restoring force of torsion spring 5 is greater than the sum of the magnetic attraction force and the weight of the remaining material, torsion spring 5 drives the rotating shaft 4 to rotate in the opposite direction. Baffle 3 slides upward along the arc surface 12 to reset, re-closes the feed channel, and restores the multiple sealing state.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated waste plastic pyrolysis feeding device, comprising a feeding hopper (1), characterized in that: A crushing component is provided on the upper part of the feeding hopper (1), and a baffle (3) is provided below the crushing component. One end of the baffle (3) is rotatably connected to the inner wall of the feeding hopper (1) through a rotating shaft (4). A reset component is provided between the rotating shaft (4) and the feeding hopper (1). A resistance mechanism is provided between the other end of the baffle (3) and the feeding hopper (1). The inner side of the feeding hopper (1) away from the rotating shaft (4) is provided as an arc surface (12). The baffle (3) is slidably disposed with the arc surface (12).

2. The integrated waste plastic pyrolysis feeding device according to claim 1, characterized in that: The resistance mechanism includes a magnet box one (7), which is fixedly installed on the baffle (3). A groove (10) is provided on the feed hopper (1) at the corresponding position of the magnet box one (7). A magnet box two (9) is provided inside the groove (10). An adjusting component is provided between the magnet box two (9) and the feed hopper (1).

3. The integrated waste plastic pyrolysis feeding device according to claim 2, characterized in that: Multiple magnet boxes (7) are provided, and the multiple magnet boxes (7) are evenly distributed. The baffle (3) at the corresponding position of the magnet box (7) is provided with a groove (8), and the magnet box (7) is fixedly installed inside the groove (8).

4. The integrated waste plastic pyrolysis feeding device according to claim 2, characterized in that: The adjusting component includes a screw (11), which is rotatably mounted on the magnet box (9). The other end of the screw (11) passes through the feed hopper (1), and the screw (11) is threadedly connected to the feed hopper (1).

5. The integrated waste plastic pyrolysis feeding device according to claim 1, characterized in that: The reset assembly includes a torsion spring (5), which is sleeved on the rotating shaft (4). One end of the torsion spring (5) is fixedly installed on the rotating shaft (4), and the other end of the torsion spring (5) is installed on the feed hopper (1). A shell (6) is sleeved on the torsion spring (5), and the shell (6) is fixedly installed on the feed hopper (1).

6. The integrated waste plastic pyrolysis feeding device according to claim 1, characterized in that: A sealing strip (13) is fixedly installed on both sides of the baffle (3). The sealing strip (13) abuts against the side wall of the feed hopper (1). A vertical plate (14) and a vertical plate (15) are provided above both ends of the baffle (3). The upper ends of the vertical plate (14) and the vertical plate (15) are fixedly connected to the feed hopper (1). A sealing strip (16) is fixedly installed at the lower ends of the vertical plate (14) and the vertical plate (15). The upper end of the sealing strip (16) abuts against the upper end of the baffle (3).

7. The integrated waste plastic pyrolysis feeding device according to claim 1, characterized in that: The crushing assembly includes a crushing roller (2), and there are two crushing rollers (2). The two crushing rollers (2) are rotatably mounted on the feed hopper (1). The power end of the crushing roller (2) is provided with a drive source, which is mounted on the feed hopper (1).

8. The integrated waste plastic pyrolysis feeding device according to claim 1, characterized in that: The feed hopper (1) is made of high temperature and corrosion resistant steel plate welded together. Its inner wall is coated with polytetrafluoroethylene anti-stick coating to prevent molten material from adhering during the pyrolysis of waste plastic. The baffle (3) is an arc-shaped steel plate structure. The width of the baffle (3) is adapted to the internal width of the feed hopper (1) to ensure no side leakage gap. The four corners of the feed hopper (1) are provided with mounting holes (17).

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