A volatile organic waste gas treatment device for a plastic tray production machine

Abstract

The application relates to the technical field of waste gas separation, and particularly discloses a volatile organic waste gas treatment device for a plastic tray production machine, which comprises a production machine, a filter box, a zeolite runner, a catalytic combustion furnace and a heat conducting oil tank; the production machine delivers waste gas to the filter box through a pipeline; one side of the filter box and a zeolite runner adsorption area are connected through a pipeline, the other side of the zeolite runner adsorption area discharges the adsorbed waste gas to the outside through a pipeline, and the zeolite runner adsorption area absorbs volatile organic substances; the desorption area of the zeolite runner is connected through a pipeline with a fresh air heating mechanism, the fresh air heating mechanism heats the outside air and delivers the air to one side of the zeolite runner desorption area, the other side of the zeolite runner desorption area is connected with the catalytic combustion furnace; the oil outlet pipe and the oil inlet pipe of the heat conducting oil tank are respectively connected with the oil inlet and the oil outlet of the production machine mold, and the catalytic combustion furnace heats the first heating area of the oil outlet pipe of the heat conducting oil tank. The application has the effects of energy saving and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of waste gas separation technology, and in particular to a device for treating volatile organic waste gas from a plastic pallet production machine. Background Technology

[0002] During the production of plastic pallets, a large amount of volatile organic compounds, particulate matter, and dust are easily generated on the production machines. Direct emission of these waste gases can easily cause environmental pollution and personal injury.

[0003] In related technologies, volatile organic compounds (VOCs) are adsorbed onto activated carbon. The VOCs enriched on the activated carbon are then desorbed at high temperatures. The desorbed VOCs are then burned to produce carbon dioxide and water, which are then emitted, thereby meeting the exhaust emission standards.

[0004] However, in the process of treating volatile organic waste gas, the organic waste gas is directly burned and emitted. During the combustion of volatile organic waste gas, a large amount of heat is generated, which is lost and energy is wasted. Summary of the Invention

[0005] In order to make the treatment of volatile organic waste gas more energy-efficient and environmentally friendly, this application provides a volatile organic waste gas treatment device for plastic pallet production machines.

[0006] The volatile organic waste gas treatment device for a plastic pallet production machine provided in this application adopts the following technical solution:

[0007] A volatile organic compound (VOC) waste gas treatment device for a plastic pallet production machine includes a production machine, a filter box, a zeolite rotor, a catalytic combustion furnace, and a heat transfer oil tank. The production machine transports waste gas to the filter box through a pipeline, where the filter box filters particulate matter and dust from the waste gas. The filter box and one side of the zeolite rotor's adsorption zone are connected by a pipeline, while the other side of the zeolite rotor's adsorption zone discharges the adsorbed waste gas to the outside through a pipeline. The zeolite rotor's adsorption zone absorbs VOCs. The zeolite rotor's desorption zone is connected by a pipeline to a fresh air heating mechanism, which heats outside air and transports it to one side of the zeolite rotor's desorption zone. The other side of the zeolite rotor's desorption zone is connected to the catalytic combustion furnace. The heat transfer oil tank's outlet and inlet pipes are respectively connected to the oil inlet and outlet of the production machine's mold. The catalytic combustion furnace heats the first heating zone of the heat transfer oil tank's outlet pipe.

[0008] Optionally, a second heating zone is provided between the first heating zone on the oil outlet pipe of the heat transfer oil tank and the production machine. The second heating zone is heated by external electricity or gas.

[0009] Optionally, a refrigeration pipe is connected between the heat transfer oil tank and the oil inlet pipe, and a refrigeration unit is connected to the refrigeration pipe.

[0010] Optionally, a plate heat exchanger is connected between the catalytic combustion furnace and the fresh air heating mechanism via a pipeline, and a fresh air intake pipe and an exhaust pipe are connected to the plate heat exchanger.

[0011] Optionally, the filter box includes a box body, a metal filter screen, a metal support mesh, and a filter cloth; one side of the box body is provided with an air inlet connected to the production machine via a pipe, and the other side of the box body is provided with an air outlet connected to the zeolite rotor adsorption zone via a pipe; the metal filter screen is installed inside the box body, the metal support mesh is installed inside the box body, and the filter cloth is laid on the side of the metal support mesh near the metal filter screen; a brush is provided on the side of the metal filter screen away from the filter cloth, the brush slides on the side of the metal filter screen, and a first drive mechanism is installed on the metal filter screen to drive the brush to move up and down.

[0012] Optionally, the first drive mechanism includes a first motor, a first lead screw, a first transmission ring, a connecting plate, and a mounting box; the first motor is mounted on the top surface of the housing, the first lead screw is rotatably connected to the top and bottom surfaces of the housing, the top end of the first lead screw is connected to the output shaft of the first motor, the first transmission ring is sleeved on the first lead screw and threaded, one end of the connecting plate is connected to the first transmission ring, the top surface of the mounting box is mounted on the other end of the connecting plate, and the brush is mounted inside the mounting box; the top and bottom ends of both sides of the metal filter screen are connected to support plates, a guide rod is connected between the two support plates on the same side, a slider is slidably mounted on the guide rod, and the slider is mounted on the side of the mounting box.

[0013] Optionally, the mounting box has a movable opening on the side near the metal filter screen. The brush plate is located inside the mounting box, the brush bristles are inside the movable opening, and the brush is pressed against the surface of the metal filter screen. A first spring is provided inside the mounting box, and the first spring is pressed against the inner wall of the mounting box and the side of the brush plate.

[0014] Optionally, a fixing box is installed on the side of the metal support mesh away from the filter cloth. The fixing box has an opening on the side near the metal support mesh. A sliding plate is slidably installed on the inner wall of the opening. One side of the sliding plate passes through the metal support mesh and contacts the filter cloth. The other side of the sliding plate is connected to a limiting plate, which is located inside the fixing box and slides within the fixing box. A second spring is installed inside the fixing box and is pressed between the side of the limiting plate and the inner wall of the fixing box. A second drive mechanism is installed on the housing to drive the sliding plate to compress the second spring.

[0015] Optionally, a support frame is installed on the top surface of the housing. The second drive mechanism includes a winding disc, a rotating tube, a movable shaft, a third spring, a guide wheel, and a traction rope. The winding disc is rotatably connected to one side of the support frame via the rotating shaft, and the rotating tube is rotatably connected to one side of the support frame. The movable shaft slides inside the rotating tube, and four guide strips are connected to the circumference of the movable shaft. A guide groove for the guide strips to slide is provided inside the rotating tube. Multiple teeth are integrally formed around the end face of the rotating shaft, with a gap between adjacent teeth. The movable shaft and the rotating shaft are coaxial, and one tooth is integrally formed on the end face of the movable shaft near the rotating shaft. The teeth of the movable shaft mesh with the teeth of the rotating shaft. The third spring is installed inside the rotating tube, with one end of the third spring pressed against the end face of the movable shaft and the other end of the third spring pressed against the end face of the closed end of the rotating tube. The guide wheel is installed on the side of the fixed box away from the metal support mesh. One end of the traction rope is connected to the circumference of the winding disc, and the other end of the traction rope passes through the top surface of the housing and is wound around the guide wheel and connected to the side of the limiting plate. A drive assembly for driving the rotating tube to rotate is installed on the support frame.

[0016] Optionally, three fixing boxes are evenly arranged along the height direction of the metal support mesh, and three second drive mechanisms are also provided; the drive assembly includes a second motor, a rotating shaft, and a set of synchronous pulleys; the second motor is installed on one side of the support frame, the rotating shaft is rotatably connected to one side of the support frame, and three sets of synchronous pulleys are provided, which are installed on the rotating tube and the rotating shaft, and each set of synchronous pulleys drives one rotating tube to rotate.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When treating the exhaust gas from the production machine, the exhaust gas is introduced into the filter box by a fan. The filter box filters particulate matter and dust, allowing volatile organic compounds (VOCs) to pass through the filter box and enter the adsorption zone of the zeolite rotor through pipes. The zeolite rotor absorbs the VOCs, and as it rotates, it moves the enriched VOCs to the desorption zone. The fresh air heating mechanism introduces and heats fresh air through a fan, allowing the hot airflow to pass through the desorption zone, causing a large amount of VOCs to desorb and enter the pipe between the zeolite rotor and the catalytic combustion furnace. The catalytic combustion furnace burns the VOCs and transfers the heat to the heat transfer oil through the oil outlet pipe. The pump on the oil outlet pipe delivers the heat transfer oil to the mold in the production machine to heat the mold. Subsequently, the heat transfer oil flows back to the heat transfer oil tank from the oil inlet pipe. The heat generated by the combustion of VOCs is transferred to the mold through the heat transfer oil to heat the mold, which saves energy for heating the mold, making the exhaust gas treatment device more energy-efficient and environmentally friendly.

[0019] 2. The high-temperature exhaust gas generated by the catalytic combustion furnace flows through pipes to the plate heat exchanger. Fresh air is introduced into the plate heat exchanger through the fan box. The plate heat exchanger transfers the heat of the exhaust gas to the fresh air. The exhaust gas that has undergone heat exchange is discharged to the outside through the exhaust gas exhaust pipe. The heated fresh air then flows through pipes to the fresh air heating mechanism. If the fresh air temperature does not reach the set value, the fresh air heating mechanism can reheat the fresh air through internal heating wires. The hot gas flow used for desorption is delivered to the desorption zone of the zeolite rotor, further utilizing the energy of the exhaust gas after combustion and saving energy.

[0020] 3. When the exhaust gas enters the chamber, it first passes through a metal filter screen and then through a filter screen. The metal filter screen filters out large particles, and the filter cloth filters out dust. After long-term use, a lot of large particles accumulate on the surface of the metal filter screen, clogging the mesh. The first drive mechanism drives the brush to move up and down, and the brush cleans the particles on the surface of the metal filter screen.

[0021] 4. The second motor drives the rotating shaft to rotate, which in turn drives the rotating tube to rotate via a synchronous belt pulley set. The rotating tube drives the movable shaft to rotate, and the movable shaft drives the teeth of the rotating shaft to rotate, which in turn drives the rotating shaft to rotate. The rotating shaft drives the winding disc to rotate, and the winding disc winds the traction rope. The traction rope pulls the limiting plate via the guide wheel. The limiting plate drives the sliding plate to move, releasing the sliding plate from the filter cloth and compressing the spring of the limiting plate. When the tension of the traction rope is too great, the teeth of the movable shaft gradually pass one tooth of the rotating shaft, and the movable shaft compresses the third spring. At this time, the movable shaft and the rotating shaft slip, and the second spring rebounds the limiting plate. The limiting plate hits the filter cloth, causing the filter cloth to shake and the dust to fall off. When the second motor drives the rotating shaft to move rapidly, the sliding plate vibrates at a high frequency, shaking off the dust on the filter cloth, and the three sliding plates vibrate in staggered shifts. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the flow structure of the waste gas treatment device according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the filter box in an embodiment of this application;

[0024] Figure 3 This is a cross-sectional structural diagram of the filter box according to an embodiment of this application;

[0025] Figure 4 This is a cross-sectional structural diagram of the mounting box according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the filter cloth in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of the metal support mesh according to an embodiment of this application;

[0028] Figure 7 This application Figure 5 A magnified structural diagram of part A in the middle;

[0029] Figure 8 This application Figure 6 A magnified structural diagram of part B in the middle section;

[0030] Figure 9 This application Figure 6 A magnified structural diagram of section C;

[0031] Figure 10 This is a partial structural schematic diagram of the second drive mechanism in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Production machine; 2. Filter box; 21. Box body; 211. Air inlet; 212. Air outlet; 213. Support frame; 22. Metal filter screen; 23. Metal support mesh; 24. Filter cloth; 25. Brush; 26. First drive mechanism; 261. First motor; 262. First lead screw; 263. First transmission ring; 264. Connecting plate; 265. Mounting box; 2651. Movable opening; 2652. First spring; 2653. Baffle; 266. Guide rod; 267. Slider; 27. Fixed box; 271. Opening; 272. Sliding plate; 273. Limiting plate; 274. Second spring; 28. Second drive mechanism; 281. Winding disc; 2811. Rotating shaft; 2812. Tooth; 282. Rotating tube; 2821. Guide groove; 283. Movable shaft; 2831. Guide bar; 284. Third spring; 285. Guide wheel; 286. Traction rope; 29. ​​Drive assembly; 291. Second motor; 292. Rotating shaft; 293. Synchronous belt pulley set; 3. Zeolite rotor; 301. Adsorption zone; 302. Desorption zone; 303. Cooling zone; 31. Fresh air heating mechanism; 32. Fresh air cooling mechanism; 4. Catalytic combustion furnace; 5. Thermal oil tank; 51. First heating zone; 52. Second heating zone; 53. Refrigerator; 6. Plate heat exchanger. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0035] This application discloses a volatile organic waste gas treatment device for a plastic pallet production machine. (Refer to...) Figure 1-10The waste gas treatment device includes a production machine 1, a filter box 2, a zeolite rotor 3, a catalytic combustion furnace 4, and a heat transfer oil tank 5. The production machine 1 transports waste gas to the filter box 2 through a pipeline, and the filter box 2 filters particulate matter and dust in the waste gas. The filter box 2 and one side of the adsorption zone 301 of the zeolite rotor 3 are connected by a pipeline, and the other side of the adsorption zone 301 of the zeolite rotor 3 discharges the adsorbed waste gas to the outside through a pipeline. The adsorption zone 301 of the zeolite rotor 3 treats volatile organic compounds. Absorption is carried out; the desorption zone 302 of the zeolite rotor 3 is connected to a fresh air heating mechanism 31 through a pipeline. The fresh air heating mechanism 31 heats the outside air and delivers it to one side of the desorption zone 302 of the zeolite rotor 3. The other side of the desorption zone 302 of the zeolite rotor 3 is connected to the catalytic combustion furnace 4; the oil outlet pipe and oil inlet pipe of the heat transfer oil tank 5 are respectively connected to the oil inlet and oil outlet of the mold of the production machine 1. The catalytic combustion furnace 4 heats the first heating zone 51 of the oil outlet pipe of the heat transfer oil tank 5.

[0036] When treating the exhaust gas from production machine 1, the exhaust gas generated by production machine 1 is introduced into filter box 2 by a fan. Filter box 2 filters particulate matter and dust, allowing volatile organic compounds (VOCs) to pass through filter box 2 and enter the adsorption zone 301 of zeolite rotor 3 through a pipe. Zeolite rotor 3 absorbs the VOCs. As zeolite rotor 3 rotates, it rotates the enriched VOCs to desorption zone 302. Fresh air heating mechanism 31 introduces fresh air through a fan and heats it, allowing the hot airflow to pass through desorption zone 302, causing a large amount of VOCs to evaporate. Volatile organic compounds (VOCs) are desorbed and enter the pipeline between the zeolite rotor 3 and the catalytic combustion furnace 4. The catalytic combustion furnace 4 burns the VOCs and transfers the heat to the heat transfer oil through the oil outlet pipe. The pump on the oil outlet pipe delivers the heat transfer oil to the mold of the production machine 1 to heat the mold. Then the heat transfer oil flows back to the heat transfer oil tank 5 through the oil inlet pipe. The heat generated by the combustion of VOCs is transferred to the mold through the heat transfer oil to heat the mold, which can save the energy of heating the mold and make the waste gas treatment device more energy-saving and environmentally friendly.

[0037] A second heating zone 52 is provided between the first heating zone 51 on the oil outlet pipe of the heat transfer oil tank 5 and the production machine 1. The second heating zone 52 is heated by external electricity or gas. When the first heating zone 51 fails to heat the heat transfer oil in the oil inlet pipe to the required temperature, the second heating zone 52 supplements the heat and heats the heat transfer oil to the required temperature.

[0038] A cooling pipe is connected between the heat transfer oil tank 5 and the oil inlet pipe, and a cooler 53 is connected to the cooling pipe. When the temperature of the mold on the production machine 1 is too high, the cooler extracts the heat transfer oil in the heat transfer oil tank 5 through its internal pump and cools it. The oil is then transported to the mold on the production machine 1 through the oil inlet pipe to cool the mold and adjust the mold temperature to a suitable range.

[0039] A plate heat exchanger 6 is connected to the catalytic combustion furnace 4 and the fresh air heating mechanism 31 via a pipe. The plate heat exchanger 6 is connected to a fresh air intake pipe and an exhaust pipe. The high-temperature exhaust gas generated by the combustion of the catalytic combustion furnace 4 flows to the plate heat exchanger 6 through the pipe. Fresh air is introduced into the plate heat exchanger 6 through the fan box. The plate heat exchanger 6 transfers the heat of the exhaust gas to the fresh air. The exhaust gas that has undergone heat exchange is discharged to the outside through the exhaust pipe. The heated fresh air then flows to the fresh air heating mechanism 31 through the pipe. If the fresh air temperature does not reach the set value, the fresh air heating mechanism 31 can reheat the fresh air through the internal electric heating wire. The hot gas flow used for desorption is transported to the desorption zone 302 of the zeolite rotor 3 to further utilize the energy of the exhaust gas after combustion and save energy.

[0040] The cooling zone 303 of the zeolite rotor 3 is connected to a fresh air cooling mechanism 32 via a pipe. The fresh air cooling mechanism 32 is used to cool the outside fresh air to cool the desorbed part of the zeolite rotor 3, so as to facilitate the subsequent absorption of volatile organic compounds.

[0041] The filter box 2 includes a box body 21, a metal filter screen 22, a metal support mesh 23, and a filter cloth 24. One side of the box body 21 is provided with an air inlet 211 that is connected to the production machine 1 through a pipe, and the other side of the box body 21 is provided with an air outlet 212 that is connected to the adsorption zone 301 of the zeolite rotor 3 through a pipe. The metal filter screen 22 is installed inside the box body 21, the metal support mesh 23 is installed inside the box body 21, and the filter cloth 24 is laid on the side of the metal support mesh 23 near the metal filter screen 22. A brush 25 is provided on the side of the metal filter screen 22 away from the filter cloth 24. The brush 25 slides on the side of the metal filter screen 22, and a first drive mechanism 26 is installed on the metal filter screen 22 to drive the brush 25 to move up and down.

[0042] Exhaust gas enters the housing 21 and first passes through the metal filter 22, then through the filter screen. The metal filter 22 filters large particles, and the filter cloth 24 filters dust. After long-term use, a lot of large particles accumulate on the surface of the metal filter 22, clogging the mesh. The first drive mechanism 26 drives the brush 25 to move up and down, and the brush 25 cleans the particles off the surface of the metal filter 22.

[0043] The first drive mechanism 26 includes a first motor 261, a first lead screw 262, a first transmission ring 263, a connecting plate 264, and a mounting box 265. The first motor 261 is mounted on the top surface of the housing 21. The first lead screw 262 is rotatably connected to the top and bottom surfaces of the housing 21. The top end of the first lead screw 262 is connected to the output shaft of the first motor 261. The first transmission ring 263 is sleeved on the first lead screw 262 and threaded. One end of the connecting plate 264 is connected to the first transmission ring 263. The top surface of the mounting box 265 is mounted on the other end of the connecting plate 264. The brush 25 is installed inside the mounting box 265. The top and bottom ends of both sides of the metal filter screen 22 are connected to support plates. A guide rod 266 is connected between the two support plates on the same side. A slider 267 is slidably mounted on the guide rod 266. The slider 267 is mounted on the side of the mounting box 265.

[0044] When it is necessary to drive the brush 25 to move up and down, the first motor 261 drives the first lead screw 262 to rotate, the first lead screw 262 drives the first transmission ring 263 to rise and fall, the first transmission ring 263 drives the connecting plate 264 to rise and fall, the connecting plate 264 drives the mounting box 265 to rise and fall, and the mounting box 265 drives the brush 25 to rise and fall.

[0045] The mounting box 265 has a movable opening 2651 on its side near the metal filter 22. The brush plate of the brush 25 is located inside the mounting box 265, and the bristles of the brush 25 are inside the movable opening 2651. The brush 25 is pressed against the surface of the metal filter 22. A first spring 2652 is provided inside the mounting box 265. The first spring 2652 is pressed against the inner wall of the mounting box 265 and the side of the brush plate of the brush 25. The first spring 2652 can press the brush 25 against the surface of the metal filter 22, so that the brush 25 can clean the metal filter 22 more thoroughly.

[0046] A baffle 2653 is installed on the side of the mounting box 265 away from the filter cloth 24. The side of the baffle 2653 slides against the inner wall of the box 21. When the brush 25 descends, the brush 25 scrapes down the particles, and the baffle 2653 can press down the dust scraped up by the brush 25.

[0047] A fixing box 27 is installed on the side of the metal support mesh 23 away from the filter cloth 24. An opening 271 is provided on the side of the fixing box 27 near the metal support mesh 23. A sliding plate 272 is slidably disposed on the inner wall of the opening 271. One side of the sliding plate 272 passes through the metal support mesh 23 and contacts the filter cloth 24. The other side of the sliding plate 272 is connected to a limiting plate 273. The limiting plate 273 is located inside the fixing box 27 and slides within the fixing box 27. A second spring 274 is provided inside the fixing box 27. The second spring 274 is pressed between the side of the limiting plate 273 and the inner wall of the fixing box 27. A second drive mechanism 28 is installed on the housing 21 for driving the sliding plate 272 to compress the second spring 274.

[0048] A support frame 213 is mounted on the top surface of the housing 21. The second drive mechanism 28 includes a winding disc 281, a rotating tube 282, a movable shaft 283, a third spring 284, a guide wheel 285, and a traction rope 286. The winding disc 281 is rotatably connected to one side of the support frame 213 via a rotating shaft 2811. The rotating tube 282 is rotatably connected to one side of the support frame 213. The movable shaft 283 slides within the rotating tube 282. Four guide bars 2831 are connected to the circumference of the movable shaft 283. A guide groove 2821 for the guide bars 2831 to slide is provided within the rotating tube 282. Multiple teeth 2812 are integrally formed around the end face of the rotating shaft 2811, with a gap between adjacent teeth 2812. The movable shaft 283 and the rotating shaft 2811 are coaxial. A tooth 2812 is integrally formed on the end face of the movable shaft 283 near the rotating shaft 292. The tooth 2812 of the movable shaft 283 meshes with the tooth 2812 of the rotating shaft 2811. A third spring 284 is installed inside the rotating tube 282. One end of the third spring 284 is pressed against the end face of the movable shaft 283, and the other end of the third spring 284 is pressed against the end face of the closed end of the rotating tube 282. A guide wheel 285 is installed on the side of the fixed box 27 away from the metal support mesh 23. One end of the traction rope 286 is connected to the circumference of the winding disc 281, and the other end of the traction rope 286 passes through the top surface of the box 21 and is wound around the guide wheel 285 and connected to the side of the limiting plate 273. A drive assembly 29 for driving the rotating tube 282 to rotate is installed on the support frame 213.

[0049] Three fixed boxes 27 are evenly arranged along the height direction of the metal support mesh 23, and three second drive mechanisms 28 are also provided; the drive assembly 29 includes a second motor 291, a rotating shaft 292, and a synchronous pulley set 293; the second motor 291 is installed on one side of the support frame 213, the rotating shaft 292 is rotatably connected to one side of the support frame 213, and three synchronous pulley sets 293 are provided. The synchronous pulley sets 293 are installed on the rotating tube 282 and the rotating shaft 292, and each synchronous pulley set 293 drives one rotating tube 282 to rotate.

[0050] The second motor 291 drives the rotating shaft 292 to rotate. The rotating shaft 292 drives the rotating tube 282 to rotate via the synchronous belt pulley group 293. The rotating tube 282 drives the movable shaft 283 to rotate. The movable shaft 283 drives the teeth 2812 of the rotating shaft 2811 to rotate via the teeth 2812, which in turn drives the rotating shaft 2811 to rotate. The rotating shaft 2811 drives the winding disc 281 to rotate. The winding disc 281 winds the traction rope 286. The traction rope 286 pulls the limiting plate 273 via the guide wheel 285. The limiting plate 273 drives the sliding plate 272 to move, releasing the sliding plate 272 from contact with the filter cloth 24 and limiting its movement. Plate 273 compresses the spring; when the tension of the traction rope 286 is too great, the tooth 2812 of the movable shaft 283 gradually passes over one tooth 2812 of the rotating shaft 2811, and the movable shaft 283 compresses the third spring 284. At this time, the movable shaft 283 and the rotating shaft 2811 slip, the second spring 274 rebounds the limiting plate 273, and the limiting plate 273 hits the filter cloth 24, causing the filter cloth 24 to shake and the dust to fall off. When the second motor 291 drives the rotating shaft 292 to move quickly, the sliding plate 272 vibrates at a high frequency, shaking off the dust on the filter cloth 24, and the three sliding plates 272 vibrate in staggered shifts.

[0051] The implementation principle of the volatile organic waste gas treatment device for a plastic pallet production machine 1 in this application embodiment is as follows: When treating the waste gas from the production machine 1, the waste gas generated by the production machine 1 is introduced into the filter box 2 by a fan. The filter box 2 filters particulate matter and dust, allowing volatile organic compounds to pass through the filter box 2 and enter the adsorption zone 301 of the zeolite rotor 3 through a pipe. The zeolite rotor 3 absorbs the volatile organic compounds. The zeolite rotor 3 rotates, rotating the enriched volatile organic compounds to the desorption zone 302. The fresh air heating mechanism 31 introduces fresh air through a fan and heats it, so that... Hot air flows through desorption zone 302, causing a large amount of volatile organic compounds to desorb and enter the pipe between zeolite rotor 3 and catalytic combustion furnace 4. Catalytic combustion furnace 4 burns the volatile organic compounds and transfers the heat to heat transfer oil through oil outlet pipe. Pump on oil outlet pipe delivers heat transfer oil to the mold of production machine 1 to heat the mold. Then, the heat transfer oil flows back to heat transfer oil tank 5 through oil inlet pipe. The heat generated by the combustion of volatile organic compounds is transferred to the mold through heat transfer oil to heat the mold, which can save energy for heating the mold and make the waste gas treatment device more energy-saving and environmentally friendly.

[0052] Figure 1 The arrows in the diagram represent the direction of liquid, gas, and energy flow.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A volatile organic waste gas treatment device for a plastic pallet production machine, characterized in that: The application relates to a waste gas treatment device, which comprises a production machine (1), a filter box (2), a zeolite rotating wheel (3), a catalytic combustion furnace (4) and a heat conducting oil tank (5); the production machine (1) is connected with the filter box (2) through a pipeline, and the filter box (2) filters particulate matters and dust in waste gas; one side of the filter box (2) and an adsorption area (301) of the zeolite rotating wheel (3) are connected through a pipeline, the other side of the adsorption area (301) of the zeolite rotating wheel (3) is connected with the outside through a pipeline, and the adsorption area (301) of the zeolite rotating wheel (3) absorbs volatile organic compounds; a fresh air heating mechanism (31) is connected with a desorption area (302) of the zeolite rotating wheel (3) through a pipeline, the fresh air heating mechanism (31) heats outside air and sends the air to one side of the desorption area (302) of the zeolite rotating wheel (3), and the other side of the desorption area (302) of the zeolite rotating wheel (3) is connected with the catalytic combustion furnace (4); an oil outlet pipe and an oil inlet pipe of the heat conducting oil tank (5) are respectively connected with an oil inlet and an oil outlet of a mold of the production machine (1), and the catalytic combustion furnace (4) heats a first heating area (51) of the oil outlet pipe of the heat conducting oil tank (5); A plate heat exchanger (6) is connected between the catalytic combustion furnace (4) and the fresh air heating mechanism (31) through a pipeline, and a fresh air inlet pipe and a waste gas outlet pipe are connected to the plate heat exchanger (6); The filter box (2) comprises a box body (21), a metal filter screen (22), a metal supporting screen (23) and filter cloth (24); one side of the box body (21) is provided with an air inlet (211) connected with the production machine (1) through a pipeline, and the other side of the box body (21) is provided with an air outlet (212) connected with the adsorption area (301) of the zeolite rotating wheel (3) through a pipeline; the metal filter screen (22) is installed in the box body (21), the metal supporting screen (23) is installed in the box body (21), and the filter cloth (24) is laid on the side of the metal supporting screen (23) close to the metal filter screen (22); a brush (25) is arranged on the side of the metal filter screen (22) away from the filter cloth (24), the brush (25) slides on the side of the metal filter screen (22), and a first driving mechanism (26) for driving the brush (25) to move up and down is installed on the metal filter screen (22); A fixing box (27) is installed on the side of the metal supporting screen (23) away from the filter cloth (24), an opening (271) is arranged on the side of the fixing box (27) close to the metal supporting screen (23), a sliding plate (272) is slidably arranged on the inner wall of the opening (271), one side of the sliding plate (272) penetrates through the metal supporting screen (23) and contacts the filter cloth (24), the other side of the sliding plate (272) is connected with a limiting plate (273), the limiting plate (273) is located in the fixing box (27) and slides in the fixing box (27); a second spring (274) is arranged in the fixing box (27) and is compressed between the side of the limiting plate (273) and the inner wall of the fixing box (27); and a second driving mechanism (28) for driving the sliding plate (272) to compress the second spring (274) is installed on the box body (21). The box (21) top surface is provided with a support frame (213), the second driving mechanism (28) comprises a winding disc (281), a rotating pipe (282), a movable shaft (283), a third spring (284), a guide wheel (285) and a traction rope (286); the winding disc (281) is rotatably connected to one side of the support frame (213) through a rotating shaft (2811), the rotating pipe (282) is rotatably connected to one side of the support frame (213), the movable shaft (283) slides in the rotating pipe (282), the movable shaft (283) is provided with four guide strips (2831) on the surface, and the rotating pipe (282) is provided with a guide groove (2821) for the guide strips (2831) to slide; a plurality of teeth (2812) are integrally formed on the end surface of the rotating shaft (2811) in one turn, there is a spacing between adjacent two teeth (2812), the movable shaft (283) is coaxial with the rotating shaft (2811), the end surface of the movable shaft (283) close to the rotating shaft (292) is integrally formed with a tooth (2812), and the tooth (2812) of the movable shaft (283) is engaged with the tooth (2812) of the rotating shaft (2811); the third spring (284) is installed in the rotating pipe (282), one end of the third spring (284) is pressed against the end surface of the movable shaft (283), and the other end of the third spring (284) is pressed against the end surface of the closed end of the rotating pipe (282); the guide wheel (285) is installed on the side surface of the fixed box (27) away from the metal support net (23), one end of the traction rope (286) is connected with the surface of the winding disc (281), and the other end of the traction rope (286) passes through the top surface of the box (21) and is wound below the guide wheel (285) and connected to the side surface of the limiting plate (273); the support frame (213) is provided with a driving assembly (29) for driving the rotating pipe (282) to rotate; The fixed box (27) is uniformly provided with three along the height direction of the metal support net (23), and the second driving mechanism (28) is also provided with three; the driving assembly (29) comprises a second motor (291), a rotating shaft (292) and a synchronous pulley set (293); the second motor (291) is installed on one side of the support frame (213), the rotating shaft (292) is rotatably connected to one side of the support frame (213), the synchronous pulley set (293) is provided with three, and the synchronous pulley set (293) is installed on the rotating pipe (282) and the rotating shaft (292); each synchronous pulley set (293) drives one rotating pipe (282) to rotate; The second motor (291) drives the rotating shaft (292) to rotate, the rotating shaft (292) drives the rotating pipe (282) to rotate through the synchronous belt wheel set (293), the rotating pipe (282) drives the movable shaft (283) to rotate, the movable shaft (283) drives the gear (2812) of the rotating shaft (2811) to rotate through the gear (2812), and the rotating shaft (2811) is also driven to rotate, the rotating shaft (2811) drives the winding disc (281) to rotate, the winding disc (281) winds the traction rope (286), the traction rope (286) pulls the limiting plate (273) through the guide wheel (285), the limiting plate (273) drives the sliding plate (272) to move, the contact between the sliding plate (272) and the filter cloth (24) is released, and the limiting plate (273) compresses the spring; when the traction rope (286) is too large in tension, the gear (2812) of the movable shaft (283) gradually passes through a gear (2812) of the rotating shaft (2811), the movable shaft (283) compresses the third spring (284), at this time, the movable shaft (283) and the rotating shaft (2811) slip, the limiting plate (273) is rebounded by the second spring (274), the limiting plate (273) hits the filter cloth (24), the filter cloth (24) is shaken, dust falls off, when the second motor (291) drives the rotating shaft (292) to move quickly, the sliding plate (272) appears high-frequency vibration, dust on the filter cloth (24) is shaken off, and the three sliding plates (272) staggeredly vibrate.

2. The volatile organic waste gas treatment device for a plastic tray production machine according to claim 1, characterized in that: The first heating area (51) on the oil outlet pipe of the heat conducting oil tank (5) and the production machine (1) are provided with a second heating area (52), and the second heating area (52) is heated by external power or gas.

3. The volatile organic waste gas treatment device for a plastic tray production machine according to claim 1, characterized in that: The heat conducting oil tank (5) and the oil inlet pipe are communicated with a refrigeration pipe, and the refrigeration pipe is communicated with a refrigeration device (53).

4. The volatile organic waste gas treatment device for a plastic tray production machine according to claim 1, characterized in that: The first driving mechanism (26) comprises a first motor (261), a first screw rod (262), a first transmission ring (263), a connecting plate (264) and a mounting box (265). The first motor (261) is installed on the top surface of the box body (21). The first screw rod (262) is rotatably connected to the top surface and the bottom surface of the box body (21). The top end of the first screw rod (262) is connected to the output shaft of the first motor (261). The first transmission ring (263) is sleeved on the first screw rod (262) and is in threaded transmission. One end of the connecting plate (264) is connected to the first transmission ring (263). The top surface of the mounting box (265) is installed on the other end of the connecting plate (264). The brush (25) is installed in the mounting box (265). The top end and the bottom end of the metal filter screen (22) on both sides are connected with support plates. The two support plates on the same side are connected with a guide rod (266). A sliding block (267) is slidably arranged on the guide rod (266). The sliding block (267) is installed on the side surface of the mounting box (265).

5. The volatile organic waste gas treatment device for a plastic tray production machine according to claim 4, characterized in that: The installation box (265) is provided with a movable opening (2651) near the side of the metal filter screen (22), the brush plate of the brush (25) is located in the installation box (265), the bristles of the brush (25) are in the movable opening (2651), the brush (25) is pressed against the surface of the metal filter screen (22), and the installation box (265) is provided with a first spring (2652) which is pressed against the inner wall of the installation box (265) and the side of the brush plate of the brush (25).

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