Plastic material pyrolysis waste gas treatment device with pressure swing adsorption function

Abstract

The invention discloses a plastic material pyrolysis waste gas treatment device with a pressure swing adsorption function, and belongs to the technical field of waste gas treatment. The plastic material pyrolysis waste gas treatment device with the pressure swing adsorption function comprises a main gas inlet pipe, an electrostatic dust collection mechanism and a pressure swing adsorption mechanism, the main gas inlet pipe, the electrostatic dust collection mechanism and the pressure swing adsorption mechanism are sequentially connected through a pipeline, and the electrostatic dust collection mechanism comprises a mounting shell, a dust collection plate, a discharge plate and a dust removal assembly. The dust collection plate and the discharge plate are located in the mounting shell, the dust removal assembly comprises a dust scraping plate, the dust scraping plate is located between the dust collection plate and the discharge plate, the variable-pressure adsorption mechanism comprises a plurality of variable-pressure cylinders and a driving assembly, and an aluminum disc and a plastic disc generate friction with cotton filler to generate an electrostatic field; plastic pyrolysis waste gas is guided into an electrostatic field, granular impurities in the plastic pyrolysis waste gas are adsorbed to a dust collection plate, and the floating granular impurities in the plastic pyrolysis waste gas are preliminarily filtered.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a plastic material pyrolysis waste gas treatment device with a pressure swing adsorption function. Background Art

[0002] For any adsorbed gas, under adsorption equilibrium conditions, the lower the temperature and the higher the pressure, the greater the adsorption amount. Conversely, the higher the temperature and the lower the pressure, the smaller the adsorption amount. Therefore, the gas adsorption separation method usually adopts two cyclic processes: temperature swing adsorption or pressure swing adsorption. Due to the large specific heat capacity of the adsorbent, both heating and cooling take a long time, which is more troublesome to operate. Therefore, temperature swing adsorption is mainly used for gas purification with less adsorbate. Pressure swing adsorption technology is a gas adsorption separation technology that is relatively convenient to operate and the process is easier to control. The adsorption amount of the adsorbent on the adsorbate increases with the increase of pressure and decreases with the decrease of pressure. At the same time, during the decompression process, the adsorbed gas is released to regenerate the adsorbent. The adsorbent can be regenerated without the need to supply heat from the outside.

[0003] There are often some problems when using a pressure swing adsorption device to treat waste gas from the pyrolysis of plastic materials. For example, the carbon black and floating material particles in the waste gas from the pyrolysis of plastic materials are difficult to remove, and will accumulate and deepen inside the pressure swing adsorption device. The gas that is pressurized and depressurized during each adsorption process is very limited, and the treatment efficiency of the entire equipment is very low. Summary of the invention

[0004] The object of the present invention is to provide a plastic material pyrolysis waste gas treatment device with a pressure swing adsorption function to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a plastic material pyrolysis waste gas treatment device with a pressure swing adsorption function, comprising a main air intake pipe, an electrostatic dust suction mechanism and a pressure swing adsorption mechanism, wherein the main air intake pipe, the electrostatic dust suction mechanism and the pressure swing adsorption mechanism are connected in sequence through pipelines, the electrostatic dust suction mechanism comprises an installation shell, a dust suction plate, a discharge plate and a cleaning component, the dust suction plate and the discharge plate are located inside the installation shell, the cleaning component comprises a scraper plate, and the scraper plate is located between the dust suction plate and the discharge plate, the pressure swing adsorption mechanism comprises several pressure swing cylinders and a driving component, each of the pressure swing cylinders is provided with a piston, the driving component drives the piston to move, and each of the pressure swing cylinders is also connected to an air inlet pipe, a main air outlet pipe and an auxiliary air outlet pipe.

[0006] Furthermore, a pneumatic impeller unit is installed on the outside of the installation shell, and two pipe holes are opened on both sides of the installation shell opposite to each other, the main air inlet pipe is connected to the air inlet end of the pneumatic impeller unit, the air outlet end of the pneumatic impeller unit is connected to a first air pipe, the other end of the first air pipe is connected to a pipe hole, and the other pipe hole is connected to a second air pipe, an aluminum disk and a plastic disk are rotatably arranged in the installation shell, the aluminum disk is arranged on the side of the dust collection plate away from the discharge plate, and the plastic disk is arranged on the side of the discharge plate away from the dust collection plate, and the plastic pyrolysis waste gas to be treated enters the pneumatic impeller unit from the main air inlet pipe, the air pressure drives the pneumatic impeller unit to rotate, the spindle drives the active bevel gear to rotate, and the active bevel gear drives the aluminum disk and the plastic disk to rotate simultaneously through the conical tooth groove, the aluminum disk and the plastic disk generate friction with the cotton filler during rotation, the aluminum disk loses electrons and becomes positively charged, and the plastic disk gains electrons and becomes negatively charged.

[0007] Furthermore, the spindle of the pneumatic impeller unit passes through the mounting shell, one end of the spindle of the pneumatic impeller unit is provided with a driving bevel gear, one end of the spindle is provided with a driving gear, the outer contours of the aluminum plate and the plastic plate are provided with conical tooth grooves, the driving bevel gear is located inside the mounting shell, the two sides of the driving bevel gear are respectively meshed with the aluminum plate and the plastic plate, the aluminum plate and the plastic plate are provided with cotton fillers on the side away from the driving bevel gear, the cotton fillers are in contact with the aluminum plate and the plastic plate, and the dust collection plate is close to the aluminum plate. The surface is negatively charged, that is, the side of the dust collecting plate facing the discharge plate is positively charged, and the side of the discharge plate close to the plastic disk is positively charged, that is, the opposite side is negatively charged. An electrostatic field is formed between the discharge plate and the dust collecting plate, and the plastic pyrolysis waste gas passes through the pneumatic impeller unit into the installation shell through the first air pipe, and the plastic pyrolysis waste gas enters the electrostatic field. The particulate impurities in the plastic pyrolysis waste gas are adsorbed onto the dust collecting plate, and the floating particulate impurities in the plastic pyrolysis waste gas are preliminarily filtered, and the preliminarily filtered gas is discharged from the second air pipe.

[0008] The cam is provided at the output end of the reduction gear set, and the pressure rod is slidably mounted on the bracket, and a return spring is provided between the pressure rod and the bracket. A roller is rotatably mounted on the top of the pressure rod, and an elastic strip is provided on the bottom side of the pressure rod. The roller contacts the cam, and one end of the swing arm is rotatably mounted on the bracket, and a return coil spring is provided at the transition between the swing arm and the bracket. A baffle is provided on the side of the swing arm close to the elastic strip, and the elastic strip drives the swing arm to swing through the baffle. A frame-shaped guide frame is connected to the top of the scraper plate, and the frame guide frame passes through the mounting shell. A slide groove is provided at the end of the swing arm away from the bracket, and the end of the frame guide frame away from the scraper plate is slidably connected to the slide groove, and the pneumatic blade The spindle of the turbine unit drives the driving gear to rotate at the same time. The speed of the driving gear is decelerated by the reduction wheel group, which makes the cam rotate slowly. The pressure rod uses the force applied by the return spring to press the roller firmly on the cam. The height of the pressure rod changes with the profile of the cam. After a period of work, the roller drops sharply on the surface of the cam, and the elastic strip immediately presses the baffle bar to press the swing arm downward. The swing arm drives the scraper plate to move downward quickly through the frame guide frame to quickly scrape off the particulate impurities adsorbed by the dust collection plate. The scraper plate pushes the bottom sealing plate at the bottom of the dust discharge groove to both sides to discharge the particulate impurities from the installation shell. After the frame guide frame drops to the bottom, it cannot move, and the swing arm cannot continue to press down. The elastic strip continues to move downward and crosses the baffle bar, and the swing arm is lifted up and reset under the action of the return coil spring. The swing arm drives the frame guide frame to lift the scraper plate, and the two bottom sealing plates close.

[0009] Furthermore, a dust exhaust groove is provided at the bottom of the mounting shell, and a bottom sealing plate is slidably provided on both sides of the dust exhaust groove, a spring is provided between each of the bottom sealing plates and the mounting shell, a pair of bottom sealing plates seals the dust exhaust groove, and a slope is provided on the upper surface of each bottom sealing plate, and the lower sides of the slopes of the two bottom sealing plates contact each other, as the cam drives the pressure rod to move slowly upward, the elastic strip passes over the baffle bar again and comes to the top of the swing arm, waiting for the next time the roller drops sharply on the surface of the cam to press the swing arm downward, thereby realizing the function of timed cleaning and improving the efficiency of electrostatic adsorption of dust.

[0010] Furthermore, the drive assembly includes a motor, a worm, a worm wheel and a drive disk, the worm being mounted on the shaft of the motor, the worm wheel being rotatably mounted on the bracket, the worm and the worm wheel cooperating with each other, the drive disk being mounted on the worm wheel, the drive disk being elliptical, and a guide groove being provided on the outer contour of the drive disk, and a hook being provided on the side of each piston close to the drive disk, the hook being slidably installed in the guide groove, and the motor being energized to drive the worm to rotate, the worm driving the worm wheel to rotate, the worm wheel driving the drive disk to rotate, and the drive disk simultaneously driving the timing ring to rotate, and the drive disk pushes the hook to move through the guide groove, the hook driving the piston to slide in the transformer cylinder, and the timing ring cooperates with the position of the piston in the transformer cylinder, and an electromagnet is used to control the orderly opening of three timing magnetic control valves on each transformer cylinder to separate the gas.

[0011] Furthermore, each of the pistons is fixedly provided with a cantilever, which is located above the outside of the transformer cylinder, and a through groove is provided on the upper part of each of the transformer cylinders, and a through sealing groove is provided in the cylinder wall of the transformer cylinder corresponding to the through groove position, and a sealing sheet is slidably installed in the sealing groove, and the sealing sheet seals the through groove, and a rotating shaft is rotatably installed on the side of the cantilever away from the hook, and the rotating shaft passes through the sealing sheet, and an adsorption piece is provided at the end of the rotating shaft away from the cantilever, and a rack is provided on one side of the edge of the through groove of the transformer cylinder, and a tooth groove is provided at the height position of the rotating shaft corresponding to the rack, and the tooth groove is meshed with the rack, and when the piston moves in the transformer cylinder, the cantilever is driven to move at the same time, and the cantilever drives the rotating shaft to slide in the through groove, and the sealing sheet slides in the sealing groove as the rotating shaft moves, and the through groove is always sealed, and the tooth groove on the rotating shaft rolls along the surface of the rack, so that the rotating shaft moves and rotates, and the adsorption piece moves and rotates in the transformer cylinder, so as to achieve the effect of uniformly adsorbing the gas in the transformer cylinder, so that the adsorption efficiency is optimized.

[0012] Furthermore, the air inlet pipe, the main air outlet pipe and the auxiliary air outlet pipe are all provided with timing magnetic control valves, and the distances between the three timing magnetic control valves and the center of the driving disk are increased successively. A driving shaft is provided on the top of the driving disk, and a timing ring is installed on the driving shaft. The bottom of the timing ring is provided with three layers of electromagnets from the inner ring to the outer ring. The timing ring and the timing magnetic control valve are connected to the control system through a circuit. When the driving disk drives the piston to pump air in the transformer cylinder for the first time, the timing magnetic control valve on the air inlet pipe opens, and the gas in the second air pipe enters the transformer cylinder through the air inlet pipe. When the driving disk drives the piston to compress in the transformer cylinder for the first time, the timing magnetic control valve on the air inlet pipe closes. During the gas compression process, the adsorbent adsorbs harmful gases. After the piston is compressed to the end, the timing magnetic control valve on the main air outlet pipe opens, and the exhaustable gas is discharged from the main air outlet pipe.

[0013] When the driving disc drives the piston to pump air in the transformer cylinder for the second time, the timing magnetic control valve on the main air outlet pipe closes, and the transformer cylinder becomes sealed. As the air pressure in the transformer cylinder decreases, the harmful gas adsorbed by the adsorbent is precipitated in the low-pressure environment and returns to the transformer cylinder. When the driving disc drives the piston to compress in the transformer cylinder for the second time, the timing magnetic control valve on the auxiliary air outlet pipe opens, and the harmful gas is discharged from the auxiliary air outlet pipe until the next round of air pumping begins. The timing magnetic control valve on the auxiliary air outlet pipe closes, and the timing magnetic control valve on the air inlet pipe opens. This cycle is repeated to achieve pressure-variable separation and filtration of plastic pyrolysis waste gas. The two pairs of transformer cylinders work alternately to speed up the gas filtration efficiency.

[0014] Furthermore, the second air pipe is connected to all the air inlet pipes, all the main air outlet pipes are connected to the same pipe, and all the auxiliary air outlet pipes are also connected to the same pipe.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] 1. The plastic pyrolysis waste gas to be treated is used to drive the pneumatic impeller unit to rotate, and then the aluminum plate and the plastic plate are used to generate friction with the cotton filler to generate an electrostatic field, and the plastic pyrolysis waste gas is introduced into the electrostatic field. The granular impurities in the plastic pyrolysis waste gas are adsorbed onto the dust collection plate, and the floating granular impurities in the plastic pyrolysis waste gas are initially filtered. The cam drives the pressure rod to move slowly, and the elastic strip is used to press the swing arm downward to realize the function of timed cleaning and improve the efficiency of electrostatic adsorption of dust.

[0017] 2. The adsorption part can move and rotate in the transformer cylinder to achieve the effect of uniform adsorption of the gas in the transformer cylinder and optimize the adsorption efficiency. The hook drives the piston to slide in the transformer cylinder, and the timing ring cooperates with the position of the piston in the transformer cylinder. The electromagnet is used to control the orderly opening of the three timing magnetic control valves on each transformer cylinder to separate the gas. The cycle is repeated to achieve the variable pressure separation and filtration of the plastic pyrolysis waste gas. The two pairs of transformer cylinders work alternately to speed up the gas filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall appearance structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall appearance structure of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the electrostatic dust collection mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of the electrostatic dust collection mechanism of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the pressure swing adsorption mechanism of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the pressure swing adsorption mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the internal structure of the pressure-changing cylinder of the present invention;

[0027] In the figure: 1, main air intake pipe; 2, pneumatic impeller unit; 301, first air pipe; 302, second air pipe; 4, mounting housing; 5, dust scraper; 6, frame guide; 701, aluminum plate; 702, plastic plate; 703, dust suction plate; 704, discharge plate; 8, driving bevel gear; 9, bottom sealing plate; 10, driving gear; 11, reduction wheel set; 12, cam; 131, roller; 132, pressure rod; 133, elastic strip ; 141, swing arm; 142, stop bar; 15, transformer cylinder; 16, piston; 17, hook; 18, cantilever; 191, rotating shaft; 192, rack; 20, adsorption piece; 21, sealing plate; 221, air inlet pipe; 222, main air outlet pipe; 223, auxiliary air outlet pipe; 23, timing magnetic control valve; 24, motor; 251, worm; 252, worm wheel; 261, drive plate; 262, drive shaft; 27, timing ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 8The present invention provides a technical solution: a plastic material pyrolysis waste gas treatment device with a pressure swing adsorption function, comprising a main air intake pipe 1, an electrostatic dust suction mechanism and a pressure swing adsorption mechanism, the main air intake pipe 1, the electrostatic dust suction mechanism and the pressure swing adsorption mechanism are connected in sequence through pipelines, the electrostatic dust suction mechanism comprises an installation shell 4, a dust suction plate 703, a discharge plate 704 and a dust cleaning component, the dust suction plate 703 and the discharge plate 704 are located inside the installation shell 4, the dust cleaning component comprises a dust scraping plate 5, and the dust scraping plate 5 is located between the dust suction plate 703 and the discharge plate 704, the pressure swing adsorption mechanism comprises a plurality of variable pressure cylinders 15 and a driving component, each variable pressure cylinder 15 is provided with a piston 16, the driving component drives the piston 16 to move, each variable pressure cylinder 15 is also connected to an air inlet pipe 221, a main air outlet pipe 222 and an auxiliary air outlet pipe 223, a pneumatic impeller unit 2 is installed outside the installation shell 4, two pipe holes are relatively opened on both sides of the installation shell 4, the main The air inlet pipe 1 is connected to the air inlet end of the pneumatic impeller unit 2, and the air outlet end of the pneumatic impeller unit 2 is connected to the first air pipe 301, and the other end of the first air pipe 301 is connected to a pipe hole, and the other pipe hole is connected to the second air pipe 302. An aluminum disk 701 and a plastic disk 702 are rotatably arranged in the mounting shell 4, and the aluminum disk 701 is arranged on the side of the dust collection plate 703 away from the discharge plate 704, and the plastic disk 702 is arranged on the side of the discharge plate 704 away from the dust collection plate 703. The plastic pyrolysis waste gas to be treated enters the pneumatic impeller unit 2 from the main air inlet pipe 1, and the air pressure drives the pneumatic impeller unit 2 to rotate, and the spindle drives the active bevel gear 8 to rotate, and the active bevel gear 8 drives the aluminum disk 701 and the plastic disk 702 to rotate simultaneously through the conical tooth grooves. The aluminum disk 701 and the plastic disk 702 generate friction with the cotton filler during rotation, and the aluminum disk 701 loses electrons and becomes positively charged, and the plastic disk 702 gains electrons and becomes negatively charged.

[0030] The spindle of the pneumatic impeller unit 2 passes through the mounting housing 4, one end of the spindle of the pneumatic impeller unit 2 is provided with a driving bevel gear 8, one end of the spindle is provided with a driving gear 10, the outer contours of the aluminum plate 701 and the plastic plate 702 are provided with conical tooth grooves, the driving bevel gear 8 is located inside the mounting housing 4, the two sides of the driving bevel gear 8 are respectively meshed with the aluminum plate 701 and the plastic plate 702, the side of the aluminum plate 701 and the plastic plate 702 away from the driving bevel gear 8 is provided with cotton filler, the cotton filler is in contact with the aluminum plate 701 and the plastic plate 702, and the side of the dust collecting plate 703 close to the aluminum plate 701 is Negative charge, that is, the side of the dust collecting plate 703 facing the discharge plate 704 is positively charged, and the side of the discharge plate 704 close to the plastic disk 702 is positively charged, that is, the opposite side is negatively charged, and an electrostatic field is formed between the discharge plate 704 and the dust collecting plate 703. The plastic pyrolysis waste gas from the pneumatic impeller unit 2 enters the installation shell 4 through the first air pipe 301. The plastic pyrolysis waste gas enters the electrostatic field, and the particulate impurities in the plastic pyrolysis waste gas are adsorbed onto the dust collecting plate 703, and the floating particulate impurities in the plastic pyrolysis waste gas are preliminarily filtered, and the preliminarily filtered gas is discharged from the second air pipe 302.

[0031] The electrostatic dust collection mechanism includes a reduction wheel group 11, a pressure rod 132 and a swing arm 141. The input end of the reduction wheel group 11 is meshed with the driving gear 10, and the output end of the reduction wheel group 11 is provided with a cam 12. The pressure rod 132 is slidably installed on the bracket, and a reset spring is provided between the pressure rod 132 and the bracket. A roller 131 is rotatably installed on the top of the pressure rod 132, and an elastic strip 133 is provided on one side of the bottom of the pressure rod 132. The roller 131 contacts the cam 12, and one end of the swing arm 141 is rotatably installed on the bracket. A reset coil spring is provided at the transition between the swing arm 141 and the bracket, and a side of the swing arm 141 close to the elastic strip 133 is provided. A baffle 142 is provided, and the elastic selector bar 133 swings the swing arm 141 through the baffle 142. A frame guide frame 6 is connected to the top of the scraper plate 5, and the frame guide frame 6 penetrates the mounting shell 4. A slide groove is provided at the end of the swing arm 141 away from the bracket, and the end of the frame guide frame 6 away from the scraper plate 5 is slidably connected to the slide groove. A dust discharge groove is provided at the bottom of the mounting shell 4, and a bottom sealing plate 9 is slidably provided on both sides of the dust discharge groove. A spring is provided between each bottom sealing plate 9 and the mounting shell 4, and a pair of bottom sealing plates 9 blocks the dust discharge groove. The upper surface of each bottom sealing plate 9 is provided with a slope, and the lower slopes of the two bottom sealing plates 9 are in contact with each other.

[0032] The spindle of the pneumatic impeller unit 2 drives the driving gear 10 to rotate at the same time. The speed of the driving gear 10 is decelerated by the reduction wheel group 11, so that the cam 12 rotates slowly. The pressure rod 132 uses the force applied by the return spring to firmly press the roller 131 on the cam 12. The height of the pressure rod 132 changes with the profile of the cam 12. After a period of work, the roller 131 drops sharply on the surface of the cam 12, and the elastic strip 133 immediately presses the stop bar 142 to press the swing arm 141 downward. The swing arm 141 drives the scraper plate 5 to move downward quickly through the frame guide 6, and quickly scrapes off the particle impurities adsorbed by the dust collecting plate 703. The scraper plate 5 presses the bottom sealing plate 9 at the bottom of the dust discharge groove. The frame guide 6 is forced open to both sides to discharge the particle impurities from the installation shell 4. After the frame guide 6 drops to the bottom, it cannot move, and the swing arm 141 cannot continue to press down. The elastic strip 133 continues to move downward and passes over the stop bar 142. The swing arm 141 is lifted up and reset under the action of the reset coil spring. The swing arm 141 drives the frame guide 6 to lift the scraper plate 5, and the two bottom sealing plates 9 are closed. As the cam 12 drives the pressure rod 132 to move slowly upward, the elastic strip 133 passes over the stop bar 142 again and comes to the top of the swing arm 141, waiting for the next time the roller 131 drops sharply on the surface of the cam 12 to press the swing arm 141 downward, thereby realizing the function of timed cleaning and improving the efficiency of electrostatic adsorption of dust.

[0033] The driving assembly includes a motor 24, a worm 251, a worm wheel 252 and a driving disc 261. The worm 251 is mounted on the shaft of the motor 24. The worm wheel 252 is rotatably mounted on the bracket. The worm 251 and the worm wheel 252 cooperate with each other. The driving disc 261 is mounted on the worm wheel 252. The driving disc 261 is elliptical. A guide groove is provided on the outer contour of the driving disc 261. A hook 17 is provided on the side of each piston 16 close to the driving disc 261. The hook 17 is slidably mounted in the guide groove. A cantilever 18 is fixedly provided on each piston 16. The cantilever 18 is located outside the transformer cylinder 15. At the top, a through groove is provided on the upper part of each transformer cylinder 15, and a through sealing groove is provided in the cylinder wall of the transformer cylinder 15 corresponding to the through groove position, and a sealing sheet 21 is slidably installed in the sealing groove, and the sealing sheet 21 seals the through groove. A rotating shaft 191 is rotatably installed on the side of the cantilever 18 away from the hook 17, and the rotating shaft 191 passes through the sealing sheet 21. An adsorption member 20 is provided on the end of the rotating shaft 191 away from the cantilever 18, and a rack 192 is provided on one side of the edge of the through groove of the transformer cylinder 15, and a tooth groove is provided at the height position of the rotating shaft 191 corresponding to the rack 192, and the tooth groove is meshed with the rack 192.

[0034] The motor 24 is powered on to drive the worm 251 to rotate, the worm 251 drives the worm wheel 252 to rotate, the worm wheel 252 drives the driving disk 261 to rotate, and the driving disk 261 drives the timing ring 27 to rotate at the same time. The driving disk 261 pushes the hook 17 to move through the guide groove, and the hook 17 drives the piston 16 to slide in the variable pressure cylinder 15. The timing ring 27 cooperates with the position of the piston 16 in the variable pressure cylinder 15, and uses the electromagnet to control the orderly opening of the three timing magnetic control valves 23 on each variable pressure cylinder 15 to separate the gas. When the piston 16 moves in the transformer cylinder 15, it drives the cantilever 18 to move at the same time. The cantilever 18 drives the rotating shaft 191 to slide in the through groove. The sealing sheet 21 slides in the sealing slide groove as the rotating shaft 191 moves, and the through groove is always sealed. The teeth on the rotating shaft 191 roll along the surface of the rack 192, so that the rotating shaft 191 moves and rotates, and the adsorption member 20 moves and rotates in the transformer cylinder 15, so as to achieve the effect of uniform adsorption of the gas in the transformer cylinder 15 and optimize the adsorption efficiency.

[0035] The air inlet pipe 221, the main air outlet pipe 222 and the auxiliary air outlet pipe 223 are all provided with a timing magnetic control valve 23, and the center distances of the three timing magnetic control valves 23 and the driving disk 261 are increased in sequence. The top of the driving disk 261 is provided with a driving shaft 262, and the driving shaft 262 is installed with a timing ring 27. The bottom of the timing ring 27 is provided with three layers of electromagnets from the inner circle to the outer circle. The timing ring 27 and the timing magnetic control valve 23 are connected to the control system through a circuit. The second air pipe 302 is connected to all the air inlet pipes 221, all the main air outlet pipes 222 are connected to the same pipe, and all the auxiliary air outlet pipes 2 23 is also connected to the same pipeline. When the driving disk 261 drives the piston 16 to pump air in the transformer cylinder 15 for the first time, the timing magnetic control valve 23 on the air inlet pipe 221 opens, and the gas in the second air pipe 302 enters the transformer cylinder 15 through the air inlet pipe 221. When the driving disk 261 drives the piston 16 to compress in the transformer cylinder 15 for the first time, the timing magnetic control valve 23 on the air inlet pipe 221 closes. During the gas compression process, the adsorbent 20 adsorbs harmful gases. After the piston 16 is compressed to the end, the timing magnetic control valve 23 on the main air outlet pipe 222 opens, and the exhaustable gas is discharged from the main air outlet pipe 222.

[0036] When the driving disk 261 drives the piston 16 to pump air in the transformer cylinder 15 for the second time, the timing magnetic control valve 23 on the main air outlet pipe 222 is closed, and the transformer cylinder 15 becomes sealed. As the air pressure in the transformer cylinder 15 decreases, the harmful gas adsorbed by the adsorbent 20 is precipitated in the low-pressure environment and returns to the transformer cylinder 15. When the driving disk 261 drives the piston 16 to compress in the transformer cylinder 15 for the second time, the timing magnetic control valve 23 on the secondary air outlet pipe 223 is opened, and the harmful gas is discharged from the secondary air outlet pipe 223 until the next round of air pumping begins. The timing magnetic control valve 23 on the secondary air outlet pipe 223 is closed, and the timing magnetic control valve 23 on the air inlet pipe 221 is opened. The cycle is repeated to achieve variable pressure separation and filtration of plastic pyrolysis waste gas. The two pairs of transformer cylinders 15 work alternately to speed up the gas filtration efficiency.

[0037] The working principle of the present invention is as follows: the plastic pyrolysis waste gas to be treated enters the pneumatic impeller unit 2 from the main air inlet pipe 1, the air pressure drives the pneumatic impeller unit 2 to rotate, the spindle drives the active bevel gear 8 to rotate, the active bevel gear 8 drives the aluminum disk 701 and the plastic disk 702 to rotate simultaneously through the conical tooth grooves, the aluminum disk 701 and the plastic disk 702 generate friction with the cotton filler during the rotation process, the aluminum disk 701 loses electrons and becomes positively charged, and the plastic disk 702 gains electrons and becomes negatively charged.

[0038] The side of the dust collecting plate 703 close to the aluminum plate 701 is negatively charged, that is, the side of the dust collecting plate 703 facing the discharge plate 704 is positively charged, and the side of the discharge plate 704 close to the plastic plate 702 is positively charged, that is, the opposite side is negatively charged. An electrostatic field is formed between the discharge plate 704 and the dust collecting plate 703, and the plastic pyrolysis waste gas from the pneumatic impeller unit 2 enters the installation shell 4 through the first air pipe 301. The plastic pyrolysis waste gas enters the electrostatic field, and the particulate impurities in the plastic pyrolysis waste gas are adsorbed onto the dust collecting plate 703, and the floating particulate impurities in the plastic pyrolysis waste gas are preliminarily filtered, and the preliminarily filtered gas is discharged from the second air pipe 302.

[0039] The spindle of the pneumatic impeller unit 2 drives the driving gear 10 to rotate at the same time. The speed of the driving gear 10 is decelerated by the reduction wheel group 11, so that the cam 12 rotates slowly. The pressure rod 132 uses the force applied by the return spring to firmly press the roller 131 on the cam 12. The height of the pressure rod 132 changes with the profile of the cam 12. After a period of work, the roller 131 drops sharply on the surface of the cam 12, and the elastic strip 133 immediately presses the stop bar 142 to press the swing arm 141 downward. The swing arm 141 drives the scraper plate 5 to move downward quickly through the frame guide 6, and quickly scrapes off the particle impurities adsorbed by the dust collecting plate 703. The scraper plate 5 presses the bottom sealing plate 9 at the bottom of the dust discharge groove. The frame guide 6 is forced open to both sides to discharge the particle impurities from the installation shell 4. After the frame guide 6 drops to the bottom, it cannot move, and the swing arm 141 cannot continue to press down. The elastic strip 133 continues to move downward and passes over the stop bar 142. The swing arm 141 is lifted up and reset under the action of the reset coil spring. The swing arm 141 drives the frame guide 6 to lift the scraper plate 5, and the two bottom sealing plates 9 are closed. As the cam 12 drives the pressure rod 132 to move slowly upward, the elastic strip 133 passes over the stop bar 142 again and comes to the top of the swing arm 141, waiting for the next time the roller 131 drops sharply on the surface of the cam 12 to press the swing arm 141 downward, thereby realizing the function of timed cleaning and improving the efficiency of electrostatic adsorption of dust.

[0040] The motor 24 is powered on to drive the worm 251 to rotate, the worm 251 drives the worm wheel 252 to rotate, the worm wheel 252 drives the driving disk 261 to rotate, and the driving disk 261 drives the timing ring 27 to rotate at the same time. The driving disk 261 pushes the hook 17 to move through the guide groove, and the hook 17 drives the piston 16 to slide in the variable pressure cylinder 15. The timing ring 27 cooperates with the position of the piston 16 in the variable pressure cylinder 15, and uses the electromagnet to control the orderly opening of the three timing magnetic control valves 23 on each variable pressure cylinder 15 to separate the gas. When the piston 16 moves in the transformer cylinder 15, it drives the cantilever 18 to move at the same time. The cantilever 18 drives the rotating shaft 191 to slide in the through groove. The sealing sheet 21 slides in the sealing slide groove as the rotating shaft 191 moves, and the through groove is always sealed. The teeth on the rotating shaft 191 roll along the surface of the rack 192, so that the rotating shaft 191 moves and rotates, and the adsorption member 20 moves and rotates in the transformer cylinder 15, so as to achieve the effect of uniform adsorption of the gas in the transformer cylinder 15 and optimize the adsorption efficiency.

[0041] When the driving disk 261 drives the piston 16 to pump air in the transformer cylinder 15 for the first time, the sequential magnetic control valve 23 on the air inlet pipe 221 opens, and the gas in the second air pipe 302 enters the transformer cylinder 15 through the air inlet pipe 221. When the driving disk 261 drives the piston 16 to compress in the transformer cylinder 15 for the first time, the sequential magnetic control valve 23 on the air inlet pipe 221 closes. During the gas compression process, the adsorbent 20 adsorbs harmful gases. After the piston 16 is compressed to the end, the sequential magnetic control valve 23 on the main air outlet pipe 222 opens, and the exhaustable gas is discharged from the main air outlet pipe 222. When the driving disk 261 drives the piston 16 to pump air in the transformer cylinder 15 for the second time, the sequential magnetic control valve 23 on the main air outlet pipe 222 closes. The control valve 23 is closed, and the transformer cylinder 15 becomes sealed. As the air pressure in the transformer cylinder 15 decreases, the harmful gas adsorbed by the adsorbent 20 is precipitated in the low-pressure environment and returns to the transformer cylinder 15. When the driving disk 261 drives the piston 16 to compress for the second time in the transformer cylinder 15, the timing magnetic control valve 23 on the auxiliary air outlet pipe 223 opens, and the harmful gas is discharged from the auxiliary air outlet pipe 223 until the next round of air extraction begins. The timing magnetic control valve 23 on the auxiliary air outlet pipe 223 is closed, and the timing magnetic control valve 23 on the air inlet pipe 221 is opened. The cycle is repeated to achieve variable pressure separation and filtration of plastic pyrolysis waste gas. The two pairs of transformer cylinders 15 work alternately to speed up the gas filtration efficiency.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plastic material pyrolysis waste gas treatment device with pressure swing adsorption function, characterized in that: The invention comprises a main air intake pipe (1), an electrostatic dust suction mechanism and a pressure swing adsorption mechanism, wherein the main air intake pipe (1), the electrostatic dust suction mechanism and the pressure swing adsorption mechanism are connected in sequence through pipelines, the electrostatic dust suction mechanism comprises a mounting shell (4), a dust suction plate (703), a discharge plate (704) and a dust cleaning component, wherein the dust suction plate (703) and the discharge plate (704) are located inside the mounting shell (4), the dust cleaning component comprises a dust scraping plate (5), and the dust scraping plate (5) is located between the dust suction plate (703) and the discharge plate (704), the pressure swing adsorption mechanism comprises a plurality of pressure swing cylinders (15) and a driving component, each of the pressure swing cylinders (15) is provided with a piston (16), and the driving component drives the piston (16) to move, and each of the pressure swing cylinders (15) is also connected to an air intake pipe (221), a main air outlet pipe (222) and an auxiliary air outlet pipe (223).

2. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 1, characterized in that: An air impeller unit (2) is installed outside the installation shell (4), and two pipe holes are provided on opposite sides of the installation shell (4); the main air inlet pipe (1) is connected to the air inlet end of the air impeller unit (2); the air outlet end of the air impeller unit (2) is connected to a first air pipe (301); the other end of the first air pipe (301) is connected to a pipe hole, and the other pipe hole is connected to a second air pipe (302); an aluminum plate (701) and a plastic plate (702) are rotatably arranged inside the installation shell (4); the aluminum plate (701) is arranged on a side of the dust suction plate (703) away from the discharge plate (704), and the plastic plate (702) is arranged on a side of the discharge plate (704) away from the dust suction plate (703).

3. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 2, characterized in that: The spindle of the pneumatic impeller unit (2) passes through the mounting housing (4); a driving bevel gear (8) is arranged at one end of the spindle of the pneumatic impeller unit (2); a driving gear (10) is arranged at one end of the spindle; conical tooth grooves are provided on the outer contours of the aluminum disk (701) and the plastic disk (702); the driving bevel gear (8) is located inside the mounting housing (4); two sides of the driving bevel gear (8) are respectively meshed with the aluminum disk (701) and the plastic disk (702); cotton fillers are arranged on the sides of the aluminum disk (701) and the plastic disk (702) away from the driving bevel gear (8); and the cotton fillers are in contact with the aluminum disk (701) and the plastic disk (702).

4. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 3 is characterized in that: The electrostatic dust suction mechanism comprises a reduction wheel group (11), a pressure rod (132) and a swing arm (141); the input end of the reduction wheel group (11) is meshed with the driving gear (10); the output end of the reduction wheel group (11) is provided with a cam (12); the pressure rod (132) is slidably mounted on a bracket; a return spring is provided between the pressure rod (132) and the bracket; a roller (131) is rotatably mounted on the top of the pressure rod (132); an elastic strip (133) is provided on one side of the bottom of the pressure rod (132); the roller (131) is in contact with the cam (12); and the swing arm (141) is provided with a plurality of springs. One end of the swing arm (141) is rotatably mounted on the bracket, a return coil spring is arranged at the transition between the swing arm (141) and the bracket, a stop bar (142) is arranged on the side of the swing arm (141) close to the elastic strip (133), the elastic strip (133) drives the swing arm (141) to swing through the stop bar (142), a frame-shaped guide frame (6) is connected to the top of the scraper plate (5), the frame-shaped guide frame (6) passes through the mounting shell (4), a sliding groove is provided at one end of the swing arm (141) away from the bracket, and one end of the frame-shaped guide frame (6) away from the scraper plate (5) is slidably connected to the sliding groove.

5. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 1, characterized in that: A dust discharge groove is provided at the bottom of the installation shell (4), and a bottom sealing plate (9) is slidably provided on both sides of the dust discharge groove. A spring is provided between each bottom sealing plate (9) and the installation shell (4). A pair of bottom sealing plates (9) seal the dust discharge groove, and a slope is provided on the upper surface of each bottom sealing plate (9). The lower sides of the slopes of the two bottom sealing plates (9) are in contact with each other.

6. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 1, characterized in that: The driving assembly comprises a motor (24), a worm (251), a worm wheel (252) and a driving disk (261); the worm (251) is mounted on the shaft of the motor (24); the worm wheel (252) is rotatably mounted on a bracket; the worm (251) and the worm wheel (252) cooperate with each other; the driving disk (261) is mounted on the worm wheel (252); the driving disk (261) is elliptical; a guide groove is provided on the outer contour of the driving disk (261); a hook (17) is provided on a side of each piston (16) close to the driving disk (261); the hook (17) is slidably mounted in the guide groove.

7. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 6, characterized in that: A cantilever (18) is fixedly arranged on each of the pistons (16). The cantilever (18) is located above the outside of the transformer cylinder (15). A through groove is provided on the upper part of each of the transformer cylinders (15). A through sealing groove is provided in the cylinder wall of the transformer cylinder (15) at a position corresponding to the through groove. A sealing sheet (21) is slidably installed in the sealing groove. The sealing sheet (21) seals the through groove. A rotating shaft (191) is rotatably installed on the side of the cantilever (18) away from the hook (17). The rotating shaft (191) passes through the sealing sheet (21). An adsorption member (20) is provided on one end of the rotating shaft (191) away from the cantilever (18). A rack (192) is provided on one side of the through groove edge of the transformer cylinder (15). A tooth groove is provided on the rotating shaft (191) at a height position corresponding to the rack (192). The tooth groove is meshed with the rack (192).

8. The device for treating waste gas from pyrolysis of plastic materials with pressure swing adsorption function according to claim 6, characterized in that: The air inlet pipe (221), the main air outlet pipe (222) and the auxiliary air outlet pipe (223) are all provided with a timing magnetic control valve (23), and the center distances of the three timing magnetic control valves (23) and the driving disk (261) are increased in sequence. A driving shaft (262) is provided on the top of the driving disk (261), and a timing ring (27) is installed on the driving shaft (262). The bottom of the timing ring (27) is provided with three layers of electromagnets from the inner ring to the outer ring. The timing ring (27) and the timing magnetic control valve (23) are connected to a control system through a circuit.

9. A plastic material pyrolysis waste gas treatment device with pressure swing adsorption function according to any one of claims 1 to 8, characterized in that: The second air pipe (302) is connected to all the air inlet pipes (221), all the main air outlet pipes (222) are connected to the same pipe, and all the auxiliary air outlet pipes (223) are also connected to the same pipe.

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