An activated carbon adsorption device for exhaust gas from a twin-screw extruder

Abstract

This invention relates to the field of high-efficiency activated carbon purification technology, and discloses an activated carbon adsorption device for exhaust gas from a twin-screw extruder. An inner adsorption seat is rotatably mounted against the wall inside the outer adsorption seat, and several sets of activated carbon filter units are evenly arranged around the edge of the inner adsorption seat. In this invention, a pressure plate descends, acting on a push rod. The push rod, under pressure, moves a piston downwards along the hydraulic oil chamber, squeezing the hydraulic oil within. The hydraulic oil is injected through an oil pipe into an expansion bladder, causing the bladder to expand further and enter the interior of the activated carbon filter unit. Simultaneously, the corrugated metal sleeve at the bottom of the expansion bladder fully expands under hydraulic pressure, adhering to the end face of the activated carbon filter screen. A horizontal telescopic rod then moves the moving frame linearly to the left, causing the corrugated metal sleeve to use a scraping part to push the activated carbon particles to the left, scraping them and ultimately transferring them from the activated carbon filter screen to the material exchange chamber, achieving automatic waste removal.

Description

Technical Field

[0001] This invention relates to the field of high-efficiency activated carbon purification technology, and in particular to an activated carbon adsorption device for exhaust gas from a twin-screw extruder. Background Technology

[0002] Twin-screw extruders generate a large amount of waste gas during production, which contains pollutants such as volatile organic compounds, plastic particles, odorous gases, and high-temperature gases. Activated carbon adsorption devices are needed to purify this waste gas. The core component of the activated carbon adsorption device is high-efficiency activated carbon particles. Activated carbon has a well-developed pore structure, including micropores (<2nm), mesopores (2-50nm), and macropores (>50nm), with a surface area of ​​800-1500m² / g. Pollutant molecules are adsorbed onto the activated carbon surface through contact with the pores and under van der Waals forces. The physical adsorption process is non-selective and can simultaneously capture multiple organic molecules, particulate matter, and odor components in the waste gas.

[0003] Existing activated carbon adsorption devices for waste gas have several technical drawbacks. First, the waste gas discharged from the extruder carries the high temperature inside the machine. When the high-temperature waste gas passes through the activated carbon adsorption device, it significantly reduces the adsorption capacity of the activated carbon, thereby reducing the waste gas purification effect. Currently, there is a lack of effective cooling measures to address this technical problem. Second, once the adsorption performance of the activated carbon reaches saturation, the activated carbon particles in the filter need to be replaced in a timely manner. However, currently, cleaning the old activated carbon particles and filling them with new ones are all done manually, which is time-consuming and labor-intensive. Third, activated carbon adsorption devices cannot adjust the filtration intensity of the activated carbon according to different levels of pollution in the waste gas, resulting in low flexibility in use.

[0004] In summary, considering that existing facilities cannot meet the operational needs, we propose an activated carbon adsorption device for exhaust gas from a twin-screw extruder. Summary of the Invention

[0005] The main objective of this invention is to provide an activated carbon adsorption device for exhaust gas from a twin-screw extruder, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An activated carbon adsorption device for exhaust gas from a twin-screw extruder includes an outer adsorption seat. Several sets of support legs are uniformly welded to the lower edge of the outer adsorption seat, preferably 3-4 sets. An inner adsorption seat is rotatably mounted against the wall inside the outer adsorption seat. Several sets of activated carbon filter units are uniformly arranged around the edge of the inner adsorption seat, preferably 4-8 sets. The bottom of each activated carbon filter unit includes an activated carbon filter screen, which is covered with activated carbon particles.

[0008] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, a support roller is vertically fixed at the middle position of the lower end face of the adsorption inner seat, a large flat bearing seat is sleeved on the lower end of the support roller, a large gear is sleeved on the middle of the support roller, a small gear is meshed on one side of the large gear, the small gear is sleeved on the output shaft of a first servo motor, and the first servo motor is vertically fixed.

[0009] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, wherein: a support platform is provided on the upper end face of the adsorption outer seat, a connecting seat is provided inside the adsorption outer seat and the support platform, an annular gas supply pipe is connected to the upper end of the connecting seat, an air inlet pipe is connected to the end of the annular gas supply pipe away from the connecting seat, a spiral cooling pipe is uniformly wrapped around the outer side of the annular gas supply pipe, a refrigerant is placed inside the spiral cooling pipe, and a number of sets of vaporization guide short pipes are uniformly connected to the upper end face of the spiral cooling pipe, preferably 20-30 sets of guide short pipes.

[0010] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, wherein: a planar annular ventilation seat is installed on the upper surface of the support platform, a fan is installed at one end of the planar annular ventilation seat, an exhaust pipe is connected to the other end of the planar annular ventilation seat, a flow channel is opened inside the planar annular ventilation seat, and a plurality of sets of vaporization guide short pipes extend into the flow channel, and a refrigerant liquefaction device connected to the lower end of the vaporization guide short pipe is fixedly installed in the middle of the flow channel.

[0011] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, wherein: a telescopic cylinder is mounted on the upper inner surface of the adsorption outer seat via two sets of riveted plates; a horizontal telescopic rod is movably arranged outward inside the telescopic cylinder; a movable frame is fixedly arranged at the end of the horizontal telescopic rod; a stamping cylinder is vertically installed inside the movable frame; a stamping rod is movably arranged downward inside the stamping cylinder; a pressure plate is welded to the lower end of the stamping rod; and the pressure plate acts on the oil supply device.

[0012] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, the oil supply device includes an arc-shaped oil cylinder, a hydraulic oil chamber, a push rod, a rod plug, a return spring, and an oil pipe. The arc-shaped oil cylinder is fixed inside the movable frame. A hydraulic oil chamber is provided inside the arc-shaped oil cylinder, into which the push rod extends. The upper end of the push rod abuts against the pressure plate. A rod plug is installed at the lower end of the push rod. The rod plug is slidably sealed within the hydraulic oil chamber. A return spring sleeved on the outside of the push rod connects the rod plug and the cylinder surface of the arc-shaped oil cylinder. An oil pipe is connected to the lower end of the arc-shaped oil cylinder.

[0013] In a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder as described in this invention, the oil pipe is inserted downward into the interior of the positioning sleeve, an expansion oil bladder is installed downward inside the positioning sleeve, the expansion oil bladder extends downward through the lower end of the moving frame, a corrugated metal sleeve is wrapped around the lower end of the expansion oil bladder, the corrugated metal sleeve extends into the interior of the activated carbon filter unit, and a scraping part is provided on the lower end face of the corrugated metal sleeve, the scraping part acting on the activated carbon particles.

[0014] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, the upper end face of the movable frame is provided with a receiving hopper, and a distributing wheel is rotatably arranged inside the movable frame and directly below the receiving hopper. The distributing wheel is located on the right side of the oil supply device, and a drive shaft is splinedly mounted in the middle of the distributing wheel. The two ends of the drive shaft are fixed to the inner wall of the movable frame by bearing seats. One end of the drive shaft extends outward and is connected to a second servo motor through a coupling. Several sets of metering grooves are evenly opened on the wheel surface of the distributing wheel. The number of metering grooves is preferably 2-4 sets. An opening is opened on the lower end face of the movable frame for partial extension of the metering grooves. Baffles are symmetrically installed on both sides of each set of activated carbon filter units, and the bottom of the distributing wheel extends into the baffles.

[0015] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, wherein: a material changing box is installed on the outer side of the adsorption outer seat, a material changing chamber is opened inside the material changing box, the material changing chamber is connected to the adsorption inner seat, the material changing chamber is for the moving frame to extend into, a discharge pipe connected to the material changing chamber is installed on the upper end face of the material changing box, an activated carbon preparation hopper is provided at the upper end of the discharge pipe, and a waste discharge channel is installed obliquely on the right side of the lower end face of the material changing box, the waste discharge channel is connected to the material changing chamber.

[0016] In a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder described in this invention, a central positioning shaft is provided at the middle position of the upper end of the support roller and below the adsorption inner seat. A damping bearing is sleeved on the outer side of the positioning shaft, and a turntable is sleeved on the outer side of the damping bearing. Curved spring grooves are evenly distributed on the upper surface of the turntable. Preferably, there are 3-6 sets of curved spring grooves, and a curved spring is installed in each set of grooves. One end of the curved spring is fixed to the groove wall, and the other end is fixed to the end of a stop post. The stop post is welded to the lower surface of the adsorption inner seat and extends into the curved spring groove.

[0017] As a preferred embodiment of the activated carbon adsorption device for exhaust gas of a twin-screw extruder described in this invention, a number of lower-layer filter units are evenly arranged around the outer side of the turntable. The lower-layer filter units and activated carbon filter units are arranged alternately in sequence, and the number of lower-layer filter units and activated carbon filter units is the same, preferably 4-8 sets.

[0018] As a preferred embodiment of the activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, wherein: a push rod motor is installed on the adsorption outer seat, and multiple push rods are arranged horizontally outward from the interior of the push rod motor. The multiple push rods extend into the interior of the adsorption outer seat, and side baffles are clamped at the ends of the multiple push rods. The side baffles act on the side of one set of lower filter units.

[0019] This invention provides an improved activated carbon adsorption device for exhaust gas from a twin-screw extruder, which has the following significant improvements and advantages compared to the prior art:

[0020] On the one hand, the high-temperature exhaust gas flows slowly through the annular air supply pipe. During the flow, it transfers its heat to the surrounding spiral cooling pipes, where the refrigerant absorbs the heat. The spiral cooling pipes make full use of the limited space by spiraling and coiling, increasing the contact area with the annular air supply pipe and significantly improving the cooling effect. This achieves rapid cooling of the flue gas and solves the adverse effects of high-temperature exhaust gas on the device. On the other hand, the refrigerant vaporizes after absorbing heat. The vapor accumulates in the spiral cooling pipes and then overflows evenly and promptly through several sets of vaporization guide pipes, achieving the purpose of timely and even outward discharge and avoiding interference with the cooling process. The fan generates a cold airflow that flows continuously in an annular flow path in the planar annular ventilation seat, effectively cooling the refrigerant liquefaction unit. This allows the internal vapor to quickly reach the liquefaction temperature and re-liquefy into refrigerant. The annular flow method significantly improves the liquefaction speed of the refrigerant liquefaction unit.

[0021] The first servo motor is started, and through a series of transmission support rollers, it drives the adsorption inner seat to make intermittent circular motion. This allows each group of activated carbon filter units to filter the waste gas in the connecting seat in turn, ensuring that the activated carbon filter units have sufficient adsorption and buffer time, thereby improving adsorption efficiency.

[0022] First, the press cylinder is activated, and the pressure plate descends, acting on the push rod. This forces the push rod to move the piston downwards along the hydraulic oil chamber, squeezing the hydraulic oil inside. The hydraulic oil is then injected into the expansion bladder through the oil pipe, causing the bladder, which was already full of hydraulic oil, to expand further and enter the interior of the activated carbon filter unit, where it adheres to the wall. Simultaneously, the corrugated metal sleeve at the bottom of the expansion bladder, which was originally in a contracted state, fully expands under the hydraulic force, adhering to the end face of the activated carbon filter screen. Then, the horizontal telescopic rod drives the moving frame to move linearly to the left, causing the corrugated metal sleeve to use the scraping part to push the activated carbon particles to slide to the left, scraping them and finally transferring them from the activated carbon filter screen to the material exchange chamber, achieving automatic waste removal, saving time and labor.

[0023] The dispensing wheel rotates in a circular motion. As the metering trough moves upward, it receives some activated carbon particles from the receiving hopper until it is full. Then, as the metering trough moves downward, it pours activated carbon particles directly out of the opening and spreads them over a section of the activated carbon filter screen. The pressing rod retracts a short distance upward, increasing the volume of oil in the hydraulic oil chamber. Due to the pressure difference, some hydraulic oil in the expansion bladder flows back into the hydraulic oil chamber, causing the expansion bladder to contract a short distance upward. Driven by the horizontal telescopic rod, the scraper moves linearly to the right, spreading the activated carbon particle layer that has just been laid on the activated carbon filter screen, improving the uniformity of the activated carbon particle layer. This process is repeated multiple times until the entire activated carbon filter screen is covered with new activated carbon particles, achieving automatic and uniform filling, saving time and labor.

[0024] When the push rod motor is started, the multi-stage push rods extend, moving the side baffles to the side of one of the lower filter units. Then, the first servo motor is started, and through a series of transmissions, the support rollers rotate the adsorption inner seat by a certain angle, thereby aligning several activated carbon filter units and several lower filter units vertically to form a double-layer filtration state, increasing the filtration intensity. When the multi-stage push rods move the side baffles away from the lower filter unit position, several compressed curved springs return to their original position, pushing the entire turntable to rotate in the opposite direction, returning to its original position and reverting to a single-layer filtration state. The filtration mode can be flexibly adjusted according to different pollution levels, making it widely applicable. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention, taken from one direction.

[0026] Figure 2 This is a schematic diagram of the overall structure of an activated carbon adsorption device for exhaust gas from a twin-screw extruder according to the present invention from another direction;

[0027] Figure 3 This is a schematic diagram of the external structure of the adsorption inner seat of the present invention;

[0028] Figure 4 This is a schematic diagram of the transmission structure of the adsorption inner seat of the present invention;

[0029] Figure 5 This is a cross-sectional view of the planar annular ventilation seat of the present invention;

[0030] Figure 6 This is a schematic diagram of the external connection of the material changing box in Embodiment 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the adsorption outer seat in Embodiment 2 of the present invention;

[0032] Figure 8 This is a schematic diagram of the external structure of the mobile frame of the present invention;

[0033] Figure 9 This is a schematic diagram of the external connection of the expandable oil bladder of the present invention;

[0034] Figure 10 This is a cross-sectional view of the oil supply device of the present invention;

[0035] Figure 11 This is a schematic diagram of the specific structure of the material distribution wheel of the present invention;

[0036] Figure 12 This is a schematic diagram showing the relative positions of the lower filter unit and the activated carbon filter unit in Embodiment 3 of the present invention;

[0037] Figure 13 This is a schematic diagram of the installation position of the turntable in Embodiment 3 of the present invention;

[0038] Figure 14 This is a schematic diagram of the upper end structure of the support roller in Embodiment 3 of the present invention.

[0039] In the diagram: 1. Adsorption outer seat; 2. Support leg; 3. Adsorption inner seat; 4. Activated carbon filter unit; 5. Activated carbon filter screen; 6. Baffle plate; 10. Support roller; 11. Flat large bearing seat; 12. Large gear; 13. Small gear; 14. First servo motor; 20. Support platform; 21. Connecting seat; 22. Annular air supply pipe; 23. Air inlet pipe; 24. Spiral cooling pipe; 25. Vaporization guide short pipe; 30. Flat annular ventilation seat; 31. Fan; 32. Exhaust pipe; 33. Flow channel; 34. Refrigerant liquefaction device; 40. Telescopic cylinder; 41. Riveting piece; 42. Horizontal telescopic rod; 43. Moving frame; 50. Stamping cylinder; 51. Stamping rod; 52. Pressure plate; 53. Oil supply device; 531. 532. Arc-shaped oil cylinder; 533. Hydraulic oil chamber; 534. Push rod; 535. Rod plug; 536. Return spring; 537. Oil pipe; 54. Positioning sleeve; 55. Expansion oil bladder; 56. Corrugated metal sleeve; 57. Scraper; 60. Receiving hopper; 61. Opening; 62. Distributing wheel; 63. Drive shaft; 64. Bearing seat; 65. Second servo motor; 66. Metering trough; 70. Material changing box; 71. Discharge pipe; 72. Activated carbon preparation hopper; 73. Waste discharge channel; 80. Positioning shaft; 81. Damping bearing; 82. Turntable; 83. Stop post; 84. Curved spring groove; 85. Curved spring; 86. Lower filter unit; 90. Push rod motor; 91. Multi-stage push rod; 92. Side baffle. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0041] like Figures 1-5 As shown, this embodiment provides an activated carbon adsorption device for exhaust gas from a twin-screw extruder, including an outer adsorption seat 1. Several sets of support legs 2 are uniformly welded to the lower edge of the outer adsorption seat 1, and the support legs 2 serve as supports. An inner adsorption seat 3 is rotatably mounted against the wall inside the outer adsorption seat 1, which serves as a limiting position. Several sets of activated carbon filter units 4 are uniformly arranged around the edge of the inner adsorption seat 3. The bottom of the activated carbon filter unit 4 includes an activated carbon filter screen 5, and the activated carbon filter screen 5 is covered with activated carbon particles.

[0042] A support roller 10 is vertically fixed at the middle position of the lower end face of the adsorption inner seat 3. A large flat bearing seat 11 is sleeved on the lower end of the support roller 10. A large gear 12 is sleeved on the middle of the support roller 10. A small gear 13 is meshed on one side of the large gear 12. The small gear 13 is sleeved on the output shaft of the first servo motor 14. The first servo motor 14 is vertically fixed. Figure 2 and Figure 4 As shown.

[0043] Furthermore, a support platform 20 is provided on the upper surface of the adsorption outer seat 1, and a connecting seat 21 is provided inside the adsorption outer seat 1 and the support platform 20, with an annular air supply pipe 22 connected to the upper end of the connecting seat 21. An air inlet pipe 23 is connected to the end of the annular air supply pipe 22 away from the connecting seat 21. Figure 1 and Figure 2 As shown.

[0044] The annular gas supply pipe 22 is uniformly wrapped with a spiral cooling pipe 24. The spiral cooling pipe 24 is spirally coiled to increase the contact area with the annular gas supply pipe 22. Refrigerant is placed inside the spiral cooling pipe 24. Several sets of vaporization guide short pipes 25 are uniformly connected to the upper end face of the spiral cooling pipe 24. Figure 1 and Figure 2 As shown.

[0045] Furthermore, a planar annular ventilation seat 30 is installed on the upper surface of the support platform 20. A fan 31 is installed at one end of the planar annular ventilation seat 30, and an exhaust pipe 32 is connected to the other end of the planar annular ventilation seat 30. Figure 1 and Figure 2 As shown.

[0046] The planar annular ventilation seat 30 has a flow channel 33 inside, and several sets of vaporization guide pipes 25 extend into the flow channel 33. A refrigerant liquefaction device 34, which is connected to the lower end of the vaporization guide pipes 25, is fixedly installed in the middle of the flow channel 33. The refrigerant liquefaction device 34 and the spiral cooling pipe 24 are connected by a pressure pump. Figure 1 and Figure 5 As shown.

[0047] In this embodiment, the high-temperature exhaust gas generated by the extruder is injected through the inlet pipe 23 and flows slowly through the annular air supply pipe 22. During the flow, the gas transfers its heat to the surrounding spiral cooling pipes 24, where the heat is absorbed by the refrigerant, thus achieving rapid cooling of the flue gas. Then, the flue gas is injected into the interior of the adsorption outer seat 1 through the connecting seat 21 and comes into contact with one of the activated carbon filter units 4. The large molecular pollutants and particulate matter in the flue gas are adsorbed by the activated carbon particles on the activated carbon filter screen 5 and then discharged downwards.

[0048] After absorbing heat, the refrigerant vaporizes to form steam. The steam accumulates in the spiral cooling pipe 24 and then overflows evenly and promptly through several sets of vaporization guide pipes 25, concentrating into the refrigerant liquefaction tank 34. At this time, the fan 31 is turned on, generating a cold airflow that continuously flows in a ring in the flow channel 33 of the planar annular ventilation seat 30, effectively cooling the refrigerant liquefaction tank 34. This allows the internal steam to quickly reach the liquefaction temperature and then re-liquefy into refrigerant. The refrigerant is then periodically injected into the spiral cooling pipe 24 through a pressure pump to achieve recycling.

[0049] By starting the first servo motor 14, the small gear 13 rotates, which in turn causes the large gear 12 to rotate through meshing and deceleration. The support roller 10 drives the adsorption inner seat 3 to perform intermittent circular motion, allowing each group of activated carbon filter units 4 to filter the waste gas in the connecting seat 21 in turn, ensuring that the activated carbon filter units 4 have sufficient adsorption and buffer time, and improving adsorption efficiency. Example 2

[0050] Based on Example 1, such as Figures 1-11 As shown, a telescopic cylinder 40 is installed on the upper inner surface of the outer adsorption seat 1 through two sets of rivet pieces 41. A horizontal telescopic rod 42 is movably arranged outward inside the telescopic cylinder 40. A movable frame 43 is fixedly arranged at the end of the horizontal telescopic rod 42. The movable frame 43 is located above the inner adsorption seat 3.

[0051] The movable frame 43 has a vertically mounted stamping cylinder 50 inside, and a downwardly movable stamping rod 51 inside the stamping cylinder 50. A pressure plate 52 is welded to the lower end of the stamping rod 51, and the pressure plate 52 acts on the oil supply device 53. Figures 7-9 As shown.

[0052] Specifically, the oil supply device 53 includes an arc-shaped oil cylinder 531, a hydraulic oil chamber 532, a push rod 533, a rod plug 534, a return spring 535, and an oil pipe 536, such as Figure 10 As shown.

[0053] In this embodiment, the arc-shaped oil cylinder 531 is fixed inside the movable frame 43. A hydraulic oil chamber 532 is provided inside the arc-shaped oil cylinder 531. The hydraulic oil chamber 532 is for the push rod 533 to extend into. The upper end of the push rod 533 abuts against the pressure plate 52. A rod plug 534 is installed at the lower end of the push rod 533. The rod plug 534 is slidably sealed in the hydraulic oil chamber 532. A return spring 535 sleeved on the outside of the push rod 533 is connected between the rod plug 534 and the cylinder surface of the arc-shaped oil cylinder 531. An oil pipe 536 is connected to the lower end of the arc-shaped oil cylinder 531.

[0054] Furthermore, the oil pipe 536 is inserted downwards into the interior of the positioning sleeve 54, which serves as a connection and positioning element. An inflatable oil bladder 55 is installed downwards inside the positioning sleeve 54. The inflatable oil bladder 55 has deformation and recovery capabilities. The inflatable oil bladder 55 extends downwards through the lower end of the movable frame 43, such as... Figure 9 As shown.

[0055] Specifically, the lower end of the expandable oil bladder 55 is wrapped with a corrugated metal sleeve 56. The corrugated metal sleeve 56 is made of a metal material with deformation recovery properties and is pressed into the interior of the activated carbon filter unit 4. The lower end face of the corrugated metal sleeve 56 is provided with a scraping part 57, which acts on the activated carbon particles (in the initial state, the scraping part 57 directly contacts the right edge of the activated carbon filter screen 5). Figure 9 As shown.

[0056] The upper surface of the movable frame 43 is provided with a receiving hopper 60 (a weighing sensor can be installed inside the receiving hopper 60). Inside the movable frame 43, directly below the receiving hopper 60, a distributing wheel 62 is rotatably mounted. The distributing wheel 62 is located to the right of the oil supply device 53. A drive shaft 63 is splinedly mounted in the middle of the distributing wheel 62. Both ends of the drive shaft 63 are fixed to the inner wall of the movable frame 43 using bearing seats 64. One end of the drive shaft 63 extends outward and is connected to a second servo motor 65 via a coupling. Figure 7 , Figure 8 , Figure 11 As shown.

[0057] In this embodiment, several sets of metering grooves 66 are evenly distributed on the surface of the distributing wheel 62. An opening 61 is provided on the lower end face of the moving frame 43 for partial extension of the metering grooves 66. Baffle plates 6 are symmetrically installed on both sides of each activated carbon filter unit 4. The baffle plates 6 serve to block and limit material flow, preventing material from splashing out of the metering grooves 66 during downward movement. The baffle plates 6 allow the bottom of the distributing wheel 62 to extend into them. Figure 8 and Figure 11 As shown.

[0058] Furthermore, a material exchange box 70 is installed on the outer side of the adsorption outer seat 1. The material exchange box 70 has an internal material exchange chamber, which is connected to the adsorption inner seat 3. Connecting ports are provided through the left and right sides of the adsorption outer seat 1, respectively connecting to the material exchange chamber and the activated carbon filter unit 4. The material exchange chamber allows the movable frame 43 to extend into it. A discharge pipe 71 connected to the material exchange chamber is installed on the upper surface of the material exchange box 70. A discharge valve is installed on the discharge pipe 71, and an activated carbon preparation hopper 72 is located at the upper end of the discharge pipe 71. A waste discharge channel 73 is installed at an angle on the right side of the lower surface of the material exchange box 70, and the waste discharge channel 73 is connected to the material exchange chamber. Figure 6 As shown.

[0059] In this embodiment, when it is necessary to replace the activated carbon particles on the activated carbon filter screen 5, the stamping cylinder 50 is first started. The stamping rod 51 drives the pressure plate 52 to descend, acting on the top rod 533. After the top rod 533 is subjected to force, it drives the rod plug 534 to move downward along the hydraulic oil chamber 532 (the return spring 535 is stretched), which squeezes the hydraulic oil in the hydraulic oil chamber 532. The hydraulic oil is injected into the expansion oil bladder 55 through the oil pipe 536, causing the oil bladder, which was originally full of hydraulic oil, to further expand and extend downward, entering the interior of the activated carbon filter unit 4 and being in a wall-adhering state. At the same time, the corrugated metal sleeve 56 at the bottom of the expansion oil bladder 55, which was originally in a contracted state, is fully opened after being subjected to hydraulic force and adheres to the upper surface of the activated carbon filter screen 5.

[0060] Re-activate the telescopic cylinder 40, and the horizontal telescopic rod 42 drives the moving frame 43 to move linearly to the left, thereby causing the corrugated metal sleeve 56 to use the scraping part 57 to push the activated carbon particles to slide to the left for scraping. Finally, the particles are transferred from the activated carbon filter screen 5 to the material exchange chamber (this process can be repeated to ensure thorough scraping). The saturated activated carbon particles are discharged downward from the waste discharge channel 73. Then, the receiving hopper 60 moves in the material exchange chamber to directly below the discharge pipe 71 and opens the discharge valve. Some of the activated carbon particles in the activated carbon preparation hopper 72 are injected into the receiving hopper 60 from the discharge pipe 71 until the receiving hopper 60 is full (or the weighing value of the weighing sensor is reached).

[0061] Then, the horizontal telescopic rod 42 drives the moving frame 43 to retract into the activated carbon filter unit 4. First, the second servo motor 65 is started, and the drive shaft 63 rotates, driving the distributing wheel 62 to make a circular motion. During the upward movement, the metering tank 66 receives part of the activated carbon particles in the receiving hopper 60 until it is full. Then, during the downward movement, the metering tank 66 directly pours out the activated carbon particles from the opening 61, spreading them on a section of the activated carbon filter screen 5 to form an activated carbon particle layer. The stamping rod 51 is then retracted upward a short distance, and the stretched return spring 535... The moving rod 534 moves upward, increasing the oil volume in the hydraulic oil chamber 532. Due to the pressure difference, some of the hydraulic oil in the expansion oil bladder 55 flows back into the hydraulic oil chamber 532, causing the expansion oil bladder to contract upward a short distance (ensuring that the scraper part 57 is at an appropriate material spreading height). Driven by the horizontal telescopic rod 42, the scraper part 57 moves straight to the right, spreading the activated carbon particles that have just been laid on the activated carbon filter screen 5, improving the uniformity of the activated carbon particles. This process is repeated multiple times until the entire activated carbon filter screen 5 is covered with new activated carbon particles. Example 3

[0062] Based on Example 1, such as Figures 12-14As shown, a central positioning shaft 80 is provided at the middle position of the upper end of the support roller 10 and below the adsorption inner seat 3. A damping bearing 81 is sleeved on the outside of the positioning shaft 80, and a turntable 82 is sleeved on the outside of the damping bearing 81. The damping bearing 81 provides a certain damping force, allowing the turntable 82 to move in a circular motion together with the support roller 10.

[0063] The upper surface of the turntable 82 is evenly provided with curved spring grooves 84. Each set of curved spring grooves 84 contains a curved spring 85. One end of the curved spring 85 is fixed to the groove wall of the curved spring groove 84, and the other end of the curved spring 85 is fixed to the end of a stop post 83. The stop post 83 is welded to the lower end surface of the adsorption inner seat 3 and extends into the curved spring groove 84. Figure 14 As shown

[0064] Among them, several sets of lower-level filter units 86 are evenly arranged around the outer side of the turntable 82, and the sets of lower-level filter units 86 and activated carbon filter units 4 are distributed alternately in a vertical sequence, such as... Figure 12 and 13 As shown.

[0065] In this embodiment, a push rod motor 90 is installed on the adsorption outer seat 1. Multiple push rods 91 extend horizontally outward from the interior of the push rod motor 90. These multiple push rods 91 extend into the adsorption outer seat 1, and their ends are clamped with side baffles 92. The side baffles 92 act on the side of one set of lower filter units 86. The adsorption outer seat 1 has an inner groove that acts on the side baffles 92. Figure 12 and Figure 13 As shown.

[0066] In this embodiment, when a dual-layer filtration mode is required, the push rod motor 90 is activated, the multi-stage push rod 91 extends, and drives the side baffle 92 to move to the side of one of the lower filter units 86. Then, the first servo motor 14 is activated, and through a series of transmissions, the support roller 10 drives the adsorption inner seat 3 to rotate at a certain angle (at this time, the turntable 82 is blocked and is in a stationary state), so that several groups of activated carbon filter units 4 and several groups of lower filter units 86 are aligned vertically (the gap between them is small), thus having the characteristics of dual-layer filtration.

[0067] When the multi-stage push rod 91 drives the side baffle 92 away from the position of the lower filter unit 86, several sets of compressed curved springs 85 return to their original position and extend, generating a relative force with the stop post 83 to push the entire turntable 82 to rotate around the positioning axis 80 (overcoming the damping force) until it returns to its original position.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An activated carbon adsorption device for exhaust gas from a twin-screw extruder, comprising an adsorption outer seat (1), characterized in that: An adsorption inner seat (3) is rotatably mounted on the inner wall of the adsorption outer seat (1). Several sets of activated carbon filter units (4) are evenly arranged around the edge of the adsorption inner seat (3). The bottom of the activated carbon filter unit (4) includes an activated carbon filter screen (5). The activated carbon filter screen (5) is covered with activated carbon particles. A support roller (10) is vertically fixed at the middle of the lower end face of the adsorption inner seat (3). A large gear (12) is sleeved in the middle of the support roller (10). A small gear (13) is meshed on one side of the large gear (12). The upper end face of the adsorption outer seat (1) is provided with a support platform (20). The adsorption outer seat (1) and the support platform (20) are connected internally to a connecting seat (21). The upper end of the connecting seat (21) is connected to an annular gas supply pipe (22). The annular gas supply pipe (22) is uniformly wrapped with a spiral cooling pipe (24). The spiral cooling pipe (24) contains a refrigerant. The upper end face of the spiral cooling pipe (24) is uniformly connected with several sets of vaporization guide short pipes (25). A planar annular ventilation seat (30) is installed on the upper surface of the support platform (20). A fan (31) is installed at one end of the planar annular ventilation seat (30), and an exhaust pipe (32) is connected to the other end of the planar annular ventilation seat (30). A flow channel (33) is opened inside the planar annular ventilation seat (30). Several sets of vaporization guide pipes (25) extend into the flow channel (33). A refrigerant liquefaction device (34) connected to the lower end of the vaporization guide pipe (25) is fixedly installed in the middle of the flow channel (33).

2. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 1, characterized in that: The lower end of the support roller (10) is fitted with a large flat bearing seat (11), the small gear (13) is fitted on the output shaft of the first servo motor (14), the first servo motor (14) is vertically fixed, and the end of the annular air supply pipe (22) away from the connecting seat (21) is connected to an air inlet pipe (23).

3. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 2, characterized in that: The upper inner surface of the adsorption outer seat (1) is fitted with a telescopic cylinder (40) by two sets of rivet pieces (41). A horizontal telescopic rod (42) is provided inside the telescopic cylinder (40) and moves outward. A movable frame (43) is fixedly provided at the end of the horizontal telescopic rod (42). A stamping cylinder (50) is installed vertically inside the movable frame (43). A stamping rod (51) is provided inside the stamping cylinder (50) and moves downward. A pressure plate (52) is welded to the lower end of the stamping rod (51) and the pressure plate (52) acts on the oil supply device (53).

4. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 3, characterized in that: The oil supply device (53) includes an arc-shaped oil cylinder (531), a hydraulic oil chamber (532), a push rod (533), a rod plug (534), a return spring (535), and an oil pipe (536). The arc-shaped oil cylinder (531) is fixed inside the movable frame (43). The arc-shaped oil cylinder (531) has a hydraulic oil chamber (532) inside it. The push rod (533) extends into the hydraulic oil chamber (532). The upper end of the push rod (533) abuts against the pressure plate (52). The lower end of the push rod (533) is equipped with a rod plug (534). The rod plug (534) is slidably sealed inside the hydraulic oil chamber (532). A return spring (535) sleeved on the outside of the push rod (533) is connected between the rod plug (534) and the cylindrical surface of the arc-shaped oil cylinder (531). The lower end of the arc-shaped oil cylinder (531) is connected to an oil pipe (536).

5. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 4, characterized in that: The oil pipe (536) is inserted downward into the interior of the positioning sleeve (54). An expansion oil bladder (55) is installed downward inside the positioning sleeve (54). The expansion oil bladder (55) extends downward through the lower end of the moving frame (43). A corrugated metal sleeve (56) is wrapped around the lower end of the expansion oil bladder (55). The corrugated metal sleeve (56) extends into the interior of the activated carbon filter unit (4). A scraping part (57) is provided on the lower end face of the corrugated metal sleeve (56). The scraping part (57) acts on the activated carbon particles.

6. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 5, characterized in that: The upper end face of the movable frame (43) is provided with a receiving hopper (60). Inside the movable frame (43) and directly below the receiving hopper (60), a distributing wheel (62) is rotatably arranged. The distributing wheel (62) is located to the right of the oil supply device (53). A drive shaft (63) is installed in the middle spline of the distributing wheel (62). One end of the drive shaft (63) extends outward and is connected to a second servo motor (65) through a coupling. Several sets of metering grooves (66) are evenly opened on the wheel surface of the distributing wheel (62). An opening (61) is opened on the lower end face of the movable frame (43) for the metering grooves (66) to partially extend out. Baffle plates (6) are symmetrically installed on both sides of each set of activated carbon filter units (4). The bottom of the distributing wheel (62) extends into the baffle plate (6).

7. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 6, characterized in that: A material exchange box (70) is installed on the outer side of the adsorption outer seat (1). A material exchange chamber is opened inside the material exchange box (70). The material exchange chamber is connected to the adsorption inner seat (3). The material exchange chamber is for the moving frame (43) to extend into. A discharge pipe (71) connected to the material exchange chamber is installed on the upper end of the material exchange box (70). An activated carbon preparation hopper (72) is provided at the upper end of the discharge pipe (71). A waste discharge channel (73) is installed at an angle on the right side of the lower end of the material exchange box (70). The waste discharge channel (73) is connected to the material exchange chamber.

8. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 2, characterized in that: A central positioning shaft (80) is provided at the middle position of the upper end of the support roller (10) and below the adsorption inner seat (3). A damping bearing (81) is sleeved on the outside of the positioning shaft (80). A turntable (82) is sleeved on the outside of the damping bearing (81). Curved spring grooves (84) are evenly opened on the upper end face of the turntable (82). A curved spring (85) is installed in each set of curved spring grooves (84). One end of the curved spring (85) is fixed to the groove wall of the curved spring groove (84). The other end of the curved spring (85) is fixed to the end of the stop post (83). The stop post (83) is welded to the lower end face of the adsorption inner seat (3) and extends into the curved spring groove (84).

9. The activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 8, characterized in that: The turntable (82) has several sets of lower filter units (86) evenly arranged around its outer side. The sets of lower filter units (86) and activated carbon filter units (4) are arranged alternately up and down.

10. An activated carbon adsorption device for exhaust gas from a twin-screw extruder according to claim 9, characterized in that: A push rod motor (90) is installed on the adsorption outer seat (1). The push rod motor (90) has multiple push rods (91) extending horizontally outward from its interior. The multiple push rods (91) extend into the adsorption outer seat (1). The ends of the multiple push rods (91) are clamped with side baffles (92). The side baffles (92) act on the side of one of the lower filter units (86).

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