Waste gas purification equipment for plastic product processing

Abstract

The invention discloses waste gas purification equipment for plastic product processing. Relates to the technical field of plastic processing waste gas purification appliances, and comprises a first tank body, a gas inlet pipe mounted on the first tank body in a communicating manner, and a second tank body, a third tank body and a fourth tank body which are sequentially communicated from bottom to top, exhaust assemblies for scattering and filtering waste gas are mounted in the second tank body and the third tank body; a filtering assembly for filtering and dehumidifying the waste gas is mounted in the fourth tank body; through the adaptive design of a rotating plate, a torsional spring and a dispersing roller, self-adaptive scattering of waste gas and impurity collection are achieved, and in cooperation with the structural design that water vapor flows back to the first tank body along a spiral blade, the continuity and convenience of equipment operation are improved; through the cooperation of the cross pipe, the nozzle and the stirring plate, the liquid is driven to stir by the exhaust gas spraying reaction force, the utilization rate of the purification liquid and the filter material is improved, and the consumable loss and the use cost are reduced.

Description

Technical Field

[0001] This invention relates to the technical field of waste gas purification equipment for plastic processing, and in particular to a waste gas purification device for plastic product processing. Background Technology

[0002] The processing of plastic products generates industrial waste gas containing pollutants such as soluble impurities, solid dust, and harmful organic gases. Direct discharge of such gas will cause environmental pollution. At the same time, the plastic processing industry has high requirements for the purification effect, efficiency, and ease of operation and maintenance of waste gas purification equipment. Therefore, the development of waste gas purification equipment adapted to plastic product processing has become an important demand in the field of waste gas treatment in plastic processing. Existing waste gas purification equipment for plastic product processing has shortcomings in practical use. Some equipment only uses a single liquid washing or filtration purification method, resulting in insufficient contact between waste gas and purification liquid and uneven utilization of filter materials, leading to poor purification effect and difficulty in achieving deep purification of waste gas, making it easy for the emitted gas to fail to meet standards. Some equipment has an unreasonable waste gas dispersion structure design, which cannot fully disperse waste gas, resulting in poor impurity interception effect, and problems such as impurity accumulation and liquid residue inside the equipment, requiring frequent manual cleaning, increasing operation and maintenance costs, and reducing the continuity of equipment operation. Therefore, improvements are needed to address the above problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a waste gas purification device for plastic product processing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a waste gas purification device for plastic product processing, comprising a first tank, an inlet pipe connected to and installed in the first tank, a second tank, a third tank, and a fourth tank connected sequentially from bottom to top, a tank cover installed on the top surface of the fourth tank, an outlet pipe connected to the top surface of the tank cover, and a fan installed at the other end of the outlet pipe. The first tank contains a liquid for purifying waste gas, and the first tank contains an agitation component for waste gas entry. The second and third tanks contain exhaust components for dispersing and filtering waste gas, and the fourth tank contains a filter component for filtering and dehumidifying waste gas.

[0005] Preferably, the agitation assembly includes a connecting pipe installed inside the first tank, the connecting pipe being connected to an air inlet pipe, and the lower end of the connecting pipe being rotatably connected to a cross tube, the cross tube being placed inside the liquid; a plurality of equidistant nozzles are connected and installed on one side of the cross tube, and an agitator plate for agitating the liquid is installed on the other side of the cross tube.

[0006] Preferably, the filter assembly includes a support frame that is horizontally rotatably disposed at the lower end of the interior of the fourth tank. A driven gear ring is installed on the top surface of the support frame. A drive gear is meshed with the four ends of the driven gear ring on its outer side. An annular baffle is installed above the support frame on the inner wall of the fourth tank. A motor for controlling the rotation of the drive gear is installed inside the annular baffle.

[0007] Preferably, a demisting plate is installed at the upper part of the inside of the fourth tank, and the inside of the support frame is filled with filter material, which, from bottom to top, consists of PP polypropylene filler, PP filter cotton, and granular activated carbon.

[0008] Preferably, the exhaust assembly includes a first spiral blade and a second spiral blade installed inside the second tank and the third tank, respectively. The outer sides of the first spiral blade and the second spiral blade abut against the inner walls of the second tank and the third tank, respectively. The spiral surfaces of the first spiral blade and the second spiral blade are provided with a plurality of equidistant mounting holes. A mounting plate is fixedly connected to the mounting hole, and the mounting hole is in close contact with the mounting plate.

[0009] Preferably, the first helical blade and the second helical blade are installed clockwise in the second tank and the third tank, respectively.

[0010] Preferably, the mounting plate has a mounting groove on its bottom surface, a rotating plate is provided in the mounting groove, the lower rear end of the rotating plate is rotatably connected to the mounting plate, and torsion springs are installed at both ends of the rotating shaft at the rotation point of the rotating plate and the mounting plate, with the other end of the torsion spring connected to the mounting plate.

[0011] Preferably, the bottom surface of the rotating plate is provided with a collection groove, a dispersing roller is rotatably connected inside the collection groove, and a plurality of equidistant dispersing plates are fixed to the outside of the dispersing roller.

[0012] Preferably, positioning ribs for aligning the upper and lower ends of the second and third helical blades are installed on the outer side of the mounting locations of the second and third tanks.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves adaptive dispersion of waste gas and collection of impurities through the adaptive design of rotating plate, torsion spring and dispersing roller. When there are too many impurities in the collection tank, the residue can be self-cleaned by the rotating plate. Combined with the structural design of water vapor flowing back to the first tank along the spiral blade, the accumulation of impurities and liquid inside the equipment is reduced, the frequency of manual cleaning is reduced, and the continuity and convenience of equipment operation are improved. Through the cooperation of cross tube, nozzle and stirring plate, the reaction force of the waste gas spray drives the liquid to stir. The contact area and time between waste gas and purified liquid can be increased without additional power. At the same time, the support frame drives the filter material to rotate, so that the waste gas passes through the filter layer evenly, improving the utilization rate of purified liquid and filter material, and reducing consumable consumption and use costs. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the stirring component of the present invention; Figure 4 This is a three-dimensional structural diagram of the filter assembly of the present invention; Figure 5 This is a three-dimensional cross-sectional structural diagram of the filter assembly of the present invention; Figure 6 This is a schematic diagram showing the connection between the first and second helical blades of the present invention; Figure 7 This is a three-dimensional structural diagram of the exhaust assembly of the present invention; Figure 8 This is a bottom-view perspective view of the exhaust assembly of the present invention. Figure 9 This is a schematic diagram showing the connection between the mounting plate and the rotating plate of the present invention; Figure 10 This is a schematic diagram showing the connection between the rotating plate and the dispersing roller of the present invention; Figure 11 This is a schematic cross-sectional view of the connection between the mounting plate and the rotating plate of the present invention; The numbers in the diagram are as follows: 1. First tank; 2. Second tank; 3. Third tank; 4. Fourth tank; 5. Tank cover; 6. Air inlet pipe; 7. Air outlet pipe; 8. Fan; 9. Connecting pipe; 10. Cross tube; 11. Nozzle; 12. Stirring plate; 13. Support frame; 14. Driven gear ring; 15. Drive gear; 16. Motor; 17. Filter material; 18. Annular baffle; 19. Demisting plate; 20. First spiral blade; 21. Second spiral blade; 22. Mounting port; 23. Mounting plate; 24. Rotating plate; 25. Torsion spring; 26. Dispersing roller; 27. Positioning rib. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] Example 1: See Figures 1 to 11This invention discloses a waste gas purification device for plastic product processing, comprising a first tank 1, an inlet pipe 6 connected to the first tank 1, a second tank 2, a third tank 3, and a fourth tank 4 connected sequentially from bottom to top, a tank cover 5 installed on the top surface of the fourth tank 4, an outlet pipe 7 connected to the top surface of the tank cover 5, and a fan 8 installed at the other end of the outlet pipe 7. The first tank 1 contains a liquid for purifying waste gas and is equipped with an agitation component for waste gas entry. The second tank 2 and the third tank 3 are equipped with exhaust components for waste gas dispersion and filtration. The fourth tank 4... The system is equipped with a filter assembly for filtering and dehumidifying exhaust gas. The first tank 1 provides a carrier for preliminary liquid washing and purification of the exhaust gas, achieving the first stage of purification. The second and third tanks 2 and 3 facilitate the upward movement of the exhaust gas along a spiral path, completing dispersion and preliminary filtration; these are the core chambers for the second stage of purification. The fourth tank 4 provides a closed chamber for deep filtration and dehumidification of the exhaust gas, achieving the third stage of purification. The inlet pipe 6 facilitates the introduction of exhaust gas generated from plastic product processing into the purification equipment. The outlet pipe 7... The design facilitates the discharge channel for purified gas that meets standards, completing a closed-loop transportation process for waste gas purification. The fan 8 facilitates the intake of waste gas into the inlet pipe 6 and propels it sequentially through the purification structures of each tank, ensuring the smooth operation of the purification process. The agitation assembly includes a connecting pipe 9 installed inside the first tank 1, which is connected to the inlet pipe 6. The lower end of the connecting pipe 9 is rotatably connected to a cross tube 10, which is placed within the liquid. Multiple equidistant nozzles 11 are connected and installed on one side of the cross tube 10, and an agitator plate 12 for agitating the liquid is installed on the other side of the cross tube 10. The connecting pipe 9 facilitates the directional transport of exhaust gas from the inlet pipe 6 to the purified liquid in the first tank 1, creating a channel for liquid washing purification. The cross tube 10 facilitates the coordinated operation of exhaust gas release and liquid agitation. The nozzle 11 disperses the exhaust gas into small streams, increasing the contact area between the exhaust gas and the purified liquid and improving the liquid washing purification effect. The agitator 12 rotates with the cross tube 10 to agitate the purified liquid, breaking the static state of the liquid, avoiding insufficient contact between the exhaust gas and the liquid, and strengthening the dissolving and purifying effect of liquid washing on the exhaust gas.

[0017] Example 2: The technical solution is basically the same as that of Example 1, except that, as Figure 2 , Figure 4 , Figure 5As shown, the filter assembly includes a support frame 13 horizontally rotatably disposed at the lower end of the interior of the fourth tank 4. A driven gear ring 14 is mounted on the top surface of the support frame 13, and a drive gear 15 is meshed at its four outer ends on the outside of the driven gear ring 14. An annular baffle 18 is mounted on the inner wall of the fourth tank 4 above the support frame 13, and a motor 16 for controlling the rotation of the drive gear 15 is installed inside the annular baffle 18. The support frame 13 facilitates the provision of filling and support space for the filter material 17, while simultaneously driving the filter material 17 to rotate, preventing exhaust gas from passing only through a fixed area and improving the utilization rate of the filter material 17. The driven gear ring 14 facilitates the smooth rotation of the support frame 13. The drive gear 15 and motor 16 facilitate the rotation of the driven gear 15. The moving gear ring 14 and the support frame 13 rotate; the annular baffle 18 provides protection for the gear transmission structure, preventing the filter material 17 or impurities from entering the transmission structure and affecting equipment operation; a demister plate 19 is installed at the upper end of the fourth tank 4, and the support frame 13 is filled with filter material 17, which consists of PP polypropylene packing, PP filter cotton, and granular activated carbon from bottom to top; the demister plate 19 facilitates dehumidification and demisting of the deeply filtered exhaust gas, intercepting water vapor in the exhaust gas and ensuring the dryness of the final discharged gas; the filter material 17 facilitates three-layer gradient filtration, sequentially intercepting large particulate impurities and fine dust, and adsorbing organic harmful gases to complete the deep purification of the exhaust gas.

[0018] Example 3: The technical solution is basically the same as that of Example 1, except that, as Figure 6 , Figure 8 , Figure 9As shown, the exhaust assembly includes a first helical blade 20 and a second helical blade 21 respectively installed inside the second tank 2 and the third tank 3. The outer sides of the first helical blade 20 and the second helical blade 21 abut against the inner walls of the second tank 2 and the third tank 3, respectively. Multiple equidistant mounting ports 22 are formed on the helical surfaces of the first helical blade 20 and the second helical blade 21. A mounting plate 23 is fixedly connected to each mounting port 22, and the mounting port 22 and the mounting plate 23 are tightly fitted together. The arrangement of the first helical blade 20 and the second helical blade 21 facilitates the upward movement of exhaust gas along the helical path, extending the exhaust gas residence time. The mounting plate 23 provides a mounting surface for the installation plate 23, facilitating the dispersion of exhaust gas. The mounting port 22 provides a fixed mounting position for the mounting plate 23, ensuring a tight fit between the mounting plate 23 and the spiral blades and preventing liquid and gas leakage. The mounting plate 23 also provides a stable mounting base for the rotating plate 24 and torsion spring 25, serving as the mounting surface for the auxiliary dispersion structure in the exhaust assembly. The first spiral blade 20 and the second spiral blade 21 are installed clockwise inside the second tank 2 and the third tank 3, respectively. The bottom surface of the mounting plate 23 has a mounting groove, within which is provided... A rotating plate 24 is rotatably connected to a mounting plate 23 at its lower rear end. Both ends of the rotating shaft at the point of rotation of the rotating plate 24 and the mounting plate 23 are equipped with torsion springs 25, the other end of which is connected to the mounting plate 23. The rotating plate 24 is designed to adapt to the impact of exhaust gas flow, obstructing and diverting the rising exhaust gas, thus initially improving the dispersion effect. The torsion springs 25 provide a restoring force for the rotating plate 24, allowing it to return to its original position when the airflow weakens or disappears, ensuring a continuous obstruction and dispersion effect on the exhaust gas. The bottom surface of the rotating plate 24 is open... A collection tank is provided, and a dispersing roller 26 is rotatably connected inside the collection tank. Multiple equidistant dispersing plates are fixed to the outside of the dispersing roller 26. The dispersing roller 26 facilitates the further dispersion of exhaust gas into micro-airflows by the dispersing plates, making it easier to intercept impurities and enhance the filtration effect. Positioning ribs 27 are installed on the outside of the mounting locations of the second tank 2 and the third tank 3 for aligning the upper and lower ends of the second spiral blade 20 and the second spiral blade 21. The positioning ribs 27 facilitate the precise alignment of the upper and lower ends of the first spiral blade 20 and the second spiral blade 21, ensuring the continuity of the spiral upward path of the exhaust gas.

[0019] Working principle: In this embodiment, the present invention also proposes a method for using a waste gas purification device for plastic product processing, including the following steps: Step 1: First, place the equipment at the exhaust gas emission point of plastic product processing, add exhaust gas purification liquid into the first tank 1, and ensure that the cross tube 10 is completely submerged in the liquid; connect the power supply to the fan 8 and motor 16, check the circuit connection, and ensure that the fan 8 can normally extract exhaust gas and the motor 16 can normally drive the drive gear 15 to operate, so as to prepare for the exhaust gas purification operation. Step 2: Start the fan 8. The fan 8 generates suction force to draw the waste gas generated during the processing of plastic products into the air inlet pipe 6. The waste gas is then transported to the cross tube 10 through the connecting pipe 9 and sprayed into the purification liquid in small streams from the nozzle 11. The reaction force of the ejected waste gas drives the cross tube 10 to rotate, and the cross tube 10 drives the agitator 12 to rotate synchronously. The agitator 12 agitates the purification liquid, breaking the static state and increasing the contact area and contact time between the waste gas and the purification liquid, thus completing the first stage of liquid washing purification of the waste gas, dissolving and removing some soluble impurities in the waste gas. Step 3: The waste gas after being washed by the first tank 1 enters the second tank 2. Under the action of the clockwise-positioned first spiral blade 20, the waste gas slowly rises along the spiral path, extending the residence time. During the rise, the waste gas drives the dispersing roller 26 to rotate, and the dispersing plate further disperses the waste gas into a small airflow, achieving the initial dispersion of the waste gas and interception of impurities. The waste gas continues to enter the third tank 3. Under the action of the second spiral blade 21 precisely aligned by the positioning rib 27, it continues the spiral upward path. The rotating plate 24 and the dispersing roller 26 disperse and filter the waste gas again, completing the second stage of purification of the waste gas. Among them, after the waste gas is dispersed by the dispersing roller 26, some insoluble residues will enter the collection tank of the rotating plate 24 with the rising gas. When there are too many residues collected in the collection tank, the rotating plate 24 will rotate. In addition, the rising gas will accelerate the rotation of the rotating plate 24, which will then hit the first spiral blade 20 and the second spiral blade 21, thereby causing some residues to fall out. At this time, the weight of the residues in the collection tank is not heavy. Under the action of the torsion spring 25, the rotating plate 24 is kept in place. Step four: The exhaust gas purified by the second tank 2 and the third tank 3 enters the fourth tank 4. The motor 16 is started, and the motor 16 drives the drive gear 15 to rotate. The drive gear 15 meshes with the driven gear ring 14, driving the support frame 13 to rotate horizontally. The support frame 13 drives the internal filter material 17 to rotate synchronously. The exhaust gas passes through the PP polypropylene packing, PP filter cotton, and granular activated carbon from bottom to top. The three-layer gradient filtration intercepts large particulate impurities and fine dust in the exhaust gas and adsorbs organic harmful gases, completing the deep purification of the exhaust gas. The annular baffle 18 protects the gear transmission structure and prevents the filter material 17 or impurities from entering and affecting the operation of the equipment. Step 5: The exhaust gas, after being deeply purified by the filter material 17, continues upward and is dehumidified and demisted by the demister plate 19, intercepting water vapor in the exhaust gas to ensure its dryness. The qualified gas after the entire process of purification and dehumidification is finally discharged to the outside through the exhaust pipe 7. The intercepted water vapor falls down, landing on the second spiral blade 21, and finally falls into the first tank 1 (where the gas falls on the lower end face of the first spiral blade 20 and the second spiral blade 21, and the liquid falls on the upper end face of the first spiral blade 20 and the second spiral blade 21). After the exhaust gas purification operation is completed, the fan 8 and the motor 16 are turned off and the power supply is disconnected. The operating status of each tank and component is checked, and impurities in the filter material 17 and the purification liquid are cleaned to facilitate the subsequent reuse of the equipment.

[0020] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste gas purification device for plastic product processing, comprising a first tank (1), an inlet pipe (6) connected to and installed in the first tank (1), a second tank (2), a third tank (3), and a fourth tank (4) connected sequentially from bottom to top, a tank cover (5) installed on the top surface of the fourth tank (4), an outlet pipe (7) connected to the top surface of the tank cover (5), and a fan (8) installed at the other end of the outlet pipe (7), characterized in that: The first tank (1) contains a liquid for purifying waste gas, and the first tank (1) contains an agitation component for waste gas entry. The second tank (2) and the third tank (3) are equipped with exhaust components for dispersing and filtering waste gas. The fourth tank (4) is equipped with a filter component for filtering and dehumidifying waste gas.

2. The waste gas purification equipment for plastic product processing according to claim 1, characterized in that: The agitation assembly includes a connecting pipe (9) installed inside the first tank (1), the connecting pipe (9) being connected to the air inlet pipe (6), and the lower end of the connecting pipe (9) being rotatably connected to the cross tube (10), the cross tube (10) being placed in the liquid; a plurality of equally spaced nozzles (11) are connected to one side of the cross tube (10), and an agitator plate (12) for agitating the liquid is installed on the other side of the cross tube (10).

3. The waste gas purification equipment for plastic product processing according to claim 1, characterized in that: The filter assembly includes a support frame (13) that is horizontally rotatably disposed at the lower end of the interior of the fourth tank (4). A driven gear ring (14) is installed on the top surface of the support frame (13). A drive gear (15) is meshed on the four ends of the driven gear ring (14). An annular baffle (18) is installed on the inner wall of the fourth tank (4) above the support frame (13). A motor (16) for controlling the rotation of the drive gear (15) is installed inside the annular baffle (18).

4. The waste gas purification equipment for plastic product processing according to claim 3, characterized in that: The upper part of the fourth tank (4) is equipped with a demisting plate (19), and the inside of the support frame (13) is filled with filter material (17). The filter material (17) consists of PP polypropylene filler, PP filter cotton and granular activated carbon from bottom to top.

5. The waste gas purification equipment for plastic product processing according to claim 1, characterized in that: The exhaust assembly includes a first spiral blade (20) and a second spiral blade (21) installed inside the second tank (2) and the third tank (3) respectively. The outer sides of the first spiral blade (20) and the second spiral blade (21) abut against the inner walls of the second tank (2) and the third tank (3) respectively. The spiral surfaces of the first spiral blade (20) and the second spiral blade (21) are provided with a plurality of equidistant mounting ports (22). A mounting plate (23) is fixedly connected inside the mounting port (22), and the mounting port (22) is tightly fitted to the mounting plate (23).

6. The waste gas purification equipment for plastic product processing according to claim 5, characterized in that: The first helical blade (20) and the second helical blade (21) are installed clockwise in the second tank (2) and the third tank (3), respectively.

7. The waste gas purification equipment for plastic product processing according to claim 5, characterized in that: The mounting plate (23) has a mounting groove on its bottom surface. A rotating plate (24) is provided in the mounting groove. The rear end of the rotating plate (24) is rotatably connected to the mounting plate (23). Torsion springs (25) are installed at both ends of the rotating shaft at the point of rotation of the rotating plate (24) and the mounting plate (23). The other end of the torsion springs (25) is connected to the mounting plate (23).

8. The waste gas purification equipment for plastic product processing according to claim 7, characterized in that: The bottom surface of the rotating plate (24) is provided with a collection groove, and a dispersing roller (26) is rotatably connected inside the collection groove. Multiple equidistant dispersing plates are fixed to the outside of the dispersing roller (26).

9. The waste gas purification equipment for plastic product processing according to claim 5, characterized in that: The second tank (2) and the third tank (3) are equipped with positioning ribs (27) on the outside of the installation location for aligning the upper and lower ends of the second helical blade (20) and the second helical blade (21).

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