Waste gas recovery device for PE pipe production

Abstract

The invention is suitable for the technical field of waste gas treatment, and provides a PE pipe production waste gas recovery device which comprises a treatment tank, two partition plates fixed in the treatment tank, a three-way gas inlet pipe and a three-way gas outlet pipe, and gas outlets are formed in the partition plates; the two ends of the three-way gas inlet pipe respectively penetrate into the two ends of the treatment tank and are fixed on the two partition plates, and the two ends of the three-way gas outlet pipe respectively penetrate into the treatment tank and are respectively positioned on the opposite sides of the two partition plates; a filter plate is slidably connected into the treatment tank and located between the two partition plates. The moving direction of waste gas on the activated carbon layer can be changed through vertical movement of the filter plate and the activated carbon layer, so that the two ends of the activated carbon layer are fully utilized; when the direction of waste gas penetrating through the activated carbon layer is changed, the activated carbon layer can be backwashed, and dust particles blocked on the activated carbon layer are blown out, so that the activated carbon layer is prevented from being blocked, and the purification efficiency of the activated carbon layer is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment, and particularly relates to a waste gas recovery device for PE pipe production. Background Art

[0002] The waste gas generated during the production of PE pipes mainly includes volatile organic compounds (VOCs), pyrolysis small molecules, soot, and odors, etc. To protect the environment, the waste gas from PE pipe production is generally treated before being discharged.

[0003] The waste gas treatment process for PE pipe production includes: waste gas collection, pretreatment, cooling and dehumidification, organic waste gas treatment, biological purification, and post-treatment and emission monitoring. Pretreatment is used to remove large particles and dust in the waste gas, reducing the burden of subsequent treatment. Cooling and dehumidification refer to cooling and dehumidifying the high-temperature waste gas to facilitate subsequent purification of organic waste gas treatment. Among them, the organic waste gas treatment mostly uses the activated carbon adsorption method. Activated carbon has a strong adsorption capacity and can effectively remove organic substances in the waste gas.

[0004] When using the activated carbon layer to treat organic waste gas, the waste gas is introduced into one side of the activated carbon layer and then discharged from the other side of the activated carbon layer. The concentrations of the waste gas in contact with both sides of the activated carbon layer are different, resulting in a large difference in the degree of use of the activated carbon on both sides of the activated carbon layer. The activated carbon on the side where the waste gas enters is prone to blockage after excessive use, reducing the waste gas treatment efficiency, while the other side is not fully utilized, resulting in the inability to fully utilize the activated carbon layer. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a waste gas recovery device for PE pipe production, aiming to solve the problem that when the existing activated carbon layer is used for waste gas treatment, the activated carbon layer cannot be fully utilized, and when one side is blocked due to excessive use, the activated carbon on the other side is not fully utilized.

[0006] The present invention is implemented as follows. A waste gas recovery device for PE pipe production includes a treatment tank, and further includes: two partitions fixed inside the treatment tank, a three-way inlet pipe, and a three-way exhaust pipe. Exhaust ports are provided on the partitions. Two ends of the three-way inlet pipe respectively penetrate into both ends of the treatment tank and are fixed on the two partitions. Two ends of the three-way exhaust pipe respectively penetrate into the treatment tank and are located on opposite sides of the two partitions. A filter plate is slidably connected inside the treatment tank. The filter plate is located between the two partitions. An activated carbon layer is installed on the filter plate. Sealing pipes are fixed at both ends of the filter plate. Exhaust grooves are provided on the side walls of the sealing pipes. The ends of the two sealing pipes are respectively slidably connected inside two ends of the three-way inlet pipe. A driving mechanism is provided on the treatment tank. The driving mechanism is used to drive the filter plate to move up and down. Sealing modules are provided on both partitions. The sealing modules are used to seal the exhaust ports. A transmission component is provided on the filter plate. When one end of the filter plate contacts one of the partitions, the transmission component drives the sealing module to open the exhaust port on this partition through the driving mechanism.

[0007] Further technical solution: The sealing module includes two sealing plates arranged inside the treatment tank. The two sealing plates are respectively located on opposite sides of the two partitions. Sealing blocks are provided on both sealing plates. The sealing blocks are consistent with the contour of the exhaust ports. Two groups of elastic pushing components are provided inside the treatment tank. The elastic pushing components drive the sealing blocks to block the exhaust ports through elastic force.

[0008] Further technical solution: Each group of elastic pushing components includes two guiding columns fixed inside the treatment tank. Compression springs I are fixedly connected to both guiding columns. The ends of the compression springs I are fixed on the sealing plates. The sealing plates are slidably connected to the guiding columns.

[0009] Further technical solution: The driving mechanism includes a motor fixed at the bottom of the treatment tank and a lead screw rotatably connected to the end of the treatment tank. The rotating end of the motor is fixedly connected to the lead screw. A sliding groove is provided on the side wall of the treatment tank. The filter plate is slidably connected to the sliding groove. A sealing plate is fixed on the filter plate. The sealing plate is slidably connected to the side wall of the treatment tank. A cross bar is horizontally arranged on the filter plate. The lead screw is threadedly connected to the cross bar.

[0010] Further technical solution: Two lead screws are rotatably connected to the side wall of the treatment tank. Gears are fixed on both lead screws. An external gear ring is rotatably connected to the side wall of the treatment tank. The external gear ring meshes with both gears at the same time. The rotating end of the motor is connected to one of the lead screws.

[0011] Further technical solution: The transmission component includes a guiding sliding groove vertically arranged on the filter plate. The cross bar is slidably connected to the guiding sliding groove. Compression springs II and push rods are fixed at both the upper and lower ends of the cross bar.

[0012] Further technical solution: A self-locking component is arranged on the plugging plate. The self-locking component includes a guiding groove horizontally arranged inside the plugging plate and a limiting groove arranged on the partition plate. A guiding block is slidably connected inside the guiding groove. Compression springs III and limiting blocks are respectively fixed at two ends of the guiding block. The compression spring III is arranged inside the guiding groove. The limiting block extends into the plugging plate and cooperates with the limiting groove. A pushing groove is arranged on the guiding block. The push rod is slidably connected with the pushing groove, and the mating surface between the push rod and the pushing groove is an inclined surface.

[0013] Further technical solution: The treatment tank includes a tank body and an end cover. The tank body and the end cover are fixedly connected by bolts. The three-way inlet pipe includes a three-way main pipe and a sub-pipe. One end of the three-way main pipe is fixedly connected with one end of the sub-pipe by bolts. The end of the sub-pipe extends into one end of the treatment tank and is fixed on one of the partition plates. One of the plugging pipes is slidably connected inside the sub-pipe. The second end of the three-way main pipe extends into one end of the treatment tank and is fixed on the other partition plate. The other plugging pipe is slidably connected inside the second end of the three-way main pipe. The guiding columns of the two groups of elastic pushing components are respectively fixed on the tank body and the end cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. By moving the filter plate and the activated carbon layer up and down, the moving direction of the waste gas on the activated carbon layer can be changed, so that both ends of the activated carbon layer are fully utilized;

[0016] 2. When changing the direction of the waste gas passing through the activated carbon layer, it can play a role in backwashing the activated carbon layer, blowing out the blocked dust particles on the activated carbon layer, thus avoiding the blockage of the activated carbon layer and improving the purification efficiency of the activated carbon layer;

[0017] 3. Under the action of the self-locking component, by controlling the moving distance of the cross bar, the working state of the activated carbon layer is adjusted, and the switching between the high-pressure and normal-pressure working states of the activated carbon layer is realized;

[0018] 4. When the filter plate drives the upper or lower partition plate in contact with the activated carbon layer, the exhaust port on the partition plate in contact with the activated carbon layer opens. Furthermore, when changing the waste gas flow direction, the waste gas on one side of the activated carbon layer can be fully purified, avoiding the discharge of the waste gas without being fully purified, thereby improving the purification efficiency of the waste gas recovery device for PE pipe production. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a waste gas recovery device for PE pipe production provided by the present invention;

[0020] Figure 2 Provided by the present invention Figure 1 Schematic structural diagram of the treatment tank in

[0021] Figure 3 For the present invention Figure 1 Internal structure schematic diagram of the processing tank in

[0022] Figure 4 For the present invention Figure 3 Structural schematic diagram of the three-way intake pipe, three-way exhaust pipe and partition in

[0023] Figure 5 For the present invention Figure 3 Structural schematic diagram of the plugging plate in

[0024] Figure 6 For the present invention Figure 3 Structural schematic diagram of the filter plate in

[0025] Figure 7 For the present invention Figure 6 Internal structure schematic diagram of the filter plate in

[0026] Figure 8 For the present invention Figure 1 Structural schematic diagram of the driving mechanism in

[0027] Figure 9 For the present invention Figure 5 Internal structure schematic diagram of the plugging plate in

[0028] Figure 10 For the present invention Figure 9 Enlarged structural schematic diagram of A in

[0029] In the drawings: 1. Processing tank; 101. Tank body; 102. End cover; 2. Three-way intake pipe; 21. Three-way main pipe; 22. Sub-pipe; 3. Three-way exhaust pipe; 4. Filter plate; 5. Activated carbon layer; 6. Partition; 61. Exhaust port; 7. Plugging plate; 71. Plugging block; 8. Elastic pushing assembly; 81. Guide post; 82. First compression spring; 9. Driving mechanism; 91. Motor; 92. Lead screw; 93. Cross bar; 94. Sliding groove; 95. Sealing plate; 96. External gear ring; 97. Gear; 10. Transmission assembly; 1001. Guide sliding groove; 1002. Second compression spring; 1003. Push rod; 11. Self-locking assembly; 111. Guide groove; 112. Guide block; 113. Third compression spring; 114. Limit block; 115. Limit groove; 116. Pushing groove; 12. Plugging pipe; 121. Exhaust groove. Detailed implementation manners

[0030] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0032] As Figures 1 - 6 shown, a waste gas recovery device for PE pipe production provided by an embodiment of the present invention includes a treatment tank 1, and further includes: two partition plates 6 fixed in the treatment tank 1, a three-way inlet pipe 2, and a three-way exhaust pipe 3. An exhaust port 61 is provided on the partition plate 6; two ends of the three-way inlet pipe 2 respectively penetrate into both ends of the treatment tank 1 and are fixed on the two partition plates 6. The remaining end of the three-way inlet pipe 2 is connected to an exhaust gas pipeline. Two ends of the three-way exhaust pipe 3 respectively penetrate into the treatment tank 1 and are located on opposite sides of the two partition plates 6. The remaining end of the three-way exhaust pipe 3 is connected to an exhaust pipeline; a filter plate 4 is slidably connected in the treatment tank 1. The filter plate 4 is located between the two partition plates 6. An activated carbon layer 5 is installed on the filter plate 4. Sealing pipes 12 are fixed at both ends of the filter plate 4. Exhaust slots 121 are provided on the side walls of the sealing pipes 12. The ends of the two sealing pipes 12 are respectively slidably connected into two ends of the three-way inlet pipe 2; a driving mechanism 9 is provided on the treatment tank 1. The driving mechanism 9 is used to drive the filter plate 4 to move up and down; sealing modules are provided on both partition plates 6. The sealing modules are used to seal the exhaust port 61. A transmission component 10 is provided on the filter plate 4. When one end of the filter plate 4 contacts one of the partition plates 6, the transmission component 10 drives the sealing module to open the exhaust port 61 on this partition plate 6 through the driving mechanism 9.

[0033] In the embodiment of the present invention, in the initial state, the filter plate 4 contacts the lower partition plate 6. The exhaust slot 121 on the lower sealing pipe 12 of the filter plate 4 is located in the three-way inlet pipe 2. The lower end of the three-way inlet pipe 2 is closed. The exhaust slot 121 on the upper sealing pipe 12 of the filter plate 4 is separated from the three-way inlet pipe 2. The upper end of the three-way inlet pipe 2 is open. The lower sealing module opens the exhaust port 61 on the lower partition plate 6. At this time, the lower end of the activated carbon layer 5 is located in the exhaust port 61 of the lower partition plate 6. The upper sealing module closes the exhaust port 61 on the upper partition plate 6. At this time, the exhaust gas enters between the upper partition plate 6 and the filter plate 4 through the upper end of the three-way inlet pipe 2. The exhaust gas moves from top to bottom on the activated carbon layer 5. At this time, the upper end of the activated carbon layer 5 contacts a large exhaust gas concentration. After the exhaust gas is filtered by the activated carbon layer 5, it passes through the exhaust port 61 on the lower partition plate 6 and then is discharged from the lower end of the three-way exhaust pipe 3;

[0034] Then, the driving mechanism 9 drives the filter plate 4 to move upward. The lower end of the filter plate 4 does not contact the lower partition plate 6, and the blocking module blocks the exhaust port 61 on the lower partition plate 6. At this time, the exhaust ports 61 on both partition plates 6 are blocked, and the gas in the treatment tank 1 cannot be discharged. The filter plate 4 drives the activated carbon layer 5 and the two blocking pipes 12 to move upward. The waste gas above the activated carbon layer 5 continues to be treated until the filter plate 4 moves to the exact middle between the two partition plates 6, as Figure 3 shown. At this time, the exhaust grooves 121 of the two blocking pipes 12 are both located in two ends of the tee inlet pipe 2, and the tee inlet pipe 2 is in a closed state. The waste gas cannot enter the treatment tank 1. As the filter plate 4 continues to move upward, the exhaust grooves 121 on the blocking pipes 12 at the lower end of the filter plate 4 are separated from the lower end of the tee inlet pipe 2, and the waste gas in the tee inlet pipe 2 enters the treatment tank 1 from the lower end of the tee inlet pipe 2. At this time, there is waste gas at both the upper and lower ends of the filter plate 4 until the upper end of the filter plate 4 contacts the upper partition plate 6. The waste gas between the upper partition plate 6 and the filter plate 4 is completely squeezed below the filter plate 4. At this time, there is only waste gas below the filter plate 4. When one end of the filter plate 4 contacts the upper partition plate 6, the transmission component 10 drives the blocking module to open the exhaust port 61 on the upper partition plate 6 through the driving mechanism 9. At this time, the waste gas below the filter plate 4 is filtered by the activated carbon layer 5 and discharged from the exhaust port 61 of the upper partition plate 6. The purified waste gas is discharged from the upper end of the tee exhaust pipe 3. The waste gas moves upward from bottom to top on the activated carbon layer 5. At this time, the waste gas concentration at the lower end of the activated carbon layer 5 in contact is high. By moving the filter plate 4 and the activated carbon layer 5 up and down, the moving direction of the waste gas on the activated carbon layer 5 can be changed, so that both ends of the activated carbon layer 5 are fully utilized. Moreover, when changing the direction of the waste gas passing through the activated carbon layer 5, it can play a role in backwashing the activated carbon layer 5, blowing out the blocked dust particles on the activated carbon layer 5, thereby avoiding the blockage of the activated carbon layer 5 and improving the purification efficiency of the activated carbon layer 5; when the filter plate 4 drives the upper or lower partition plate 6 in contact with the activated carbon layer 5, the exhaust port 61 on the partition plate 6 in contact with the activated carbon layer 5 is opened. Furthermore, when changing the waste gas flow direction, the waste gas on one side of the activated carbon layer 5 can be fully purified, avoiding the discharge of waste gas without being fully purified, thereby improving the purification efficiency of the waste gas recovery device for PE pipe production.

[0035] As Figures 1 - 6As shown, as a preferred embodiment of the present invention, the plugging module includes two plugging plates 7 arranged in the treatment tank 1. The two plugging plates 7 are respectively located on opposite sides of the two partition plates 6. Plugging blocks 71 are arranged on both of the two plugging plates 7. The plugging blocks 71 are consistent with the contour of the exhaust ports 61. Two groups of elastic pushing components 8 are arranged in the treatment tank 1. The elastic pushing components 8 drive the plugging blocks 71 to block the exhaust ports 61 by elastic force; each group of the elastic pushing components 8 includes two guiding columns 81 fixed in the treatment tank 1. Compression springs 82 are fixedly connected to both of the two guiding columns 81. The ends of the compression springs 82 are fixed on the plugging plates 7. The plugging plates 7 are slidably connected to the guiding columns 81.

[0036] In the embodiment of the present invention, when the filter plate 4 does not contact the partition plate 6, the compression spring 82 pushes the plugging plate 7 to move, and the plugging plate 7 drives the plugging block 71 to block the exhaust port 61.

[0037] As Figures 1 - 8 As shown, as a preferred embodiment of the present invention, the driving mechanism 9 includes a motor 91 fixed to the bottom of the treatment tank 1 and a lead screw 92 rotatably connected to the end of the treatment tank 1. The rotating end of the motor 91 is fixedly connected to the lead screw 92. A sliding groove 94 is arranged on the side wall of the treatment tank 1. The filter plate 4 is slidably connected in the sliding groove 94. A sealing plate 95 is fixed on the filter plate 4. The sealing plate 95 is slidably connected to the side wall of the treatment tank 1. A cross bar 93 is horizontally arranged on the filter plate 4. The lead screw 92 is threadedly connected to the cross bar 93. Two lead screws 92 are rotatably connected to the side wall of the treatment tank 1. Gears 97 are fixed on both of the two lead screws 92. An external toothed ring 96 is rotatably connected to the side wall of the treatment tank 1. The external toothed ring 96 meshes with both of the two gears 97 at the same time. The rotating end of the motor 91 is connected to one of the lead screws 92. The transmission component 10 includes a guiding chute 1001 vertically arranged on the filter plate 4. The cross bar 93 is slidably connected in the guiding chute 1001. Compression springs 1002 and push rods 1003 are fixed to both the upper and lower ends of the cross bar 93.

[0038] In an embodiment of the present invention, the motor 91 drives one of the lead screws 92 to rotate. This lead screw 92 drives one of the gears 97 to rotate. This gear 97 drives the outer tooth ring 96 to rotate. The outer tooth ring 96 drives another gear 97 to rotate. Another gear 97 drives another lead screw 92 to rotate, so that the two lead screws 92 rotate synchronously. The lead screw 92 drives the cross bar 93 to move up and down by means of screw thread transmission. The cross bar 93 drives the filter plate 4 to move through the second compression spring 1002. When the filter plate 4 moves, the filter plate 4 drives the sealing plate 95 to move. The sealing plate 95 blocks the sliding groove 94, thereby preventing the exhaust gas in the treatment tank 1 from leaking out through the sliding groove 94 and improving the sealing performance of the treatment tank 1. When the filter plate 4 contacts one of the partition plates 6, the cross bar 93 continues to move. The cross bar 93 overcomes the elastic force of the second compression spring 1002 and drives the push rod 1003 to move relative to the filter plate 4. The push rod 1003 extends out of the filter plate 4 and pushes the plugging plate 7, so that the plugging plate 7 overcomes the elastic force of the first compression spring 82 and drives the plugging block 71 to disengage from the exhaust port 61. The exhaust port 61 on the partition plate 6 is opened.

[0039] As Figures 1 - 10 shown, as a preferred embodiment of the present invention, a self-locking assembly 11 is provided on the plugging plate 7. The self-locking assembly 11 includes a horizontally arranged guide groove 111 in the plugging plate 7 and a limiting groove 115 provided on the partition plate 6. A guide block 112 is slidably connected in the guide groove 111. Two ends of the guide block 112 are respectively fixed with a third compression spring 113 and a limiting block 114. The third compression spring 113 is arranged in the guide groove 111. The limiting block 114 extends into the plugging plate 7 and cooperates with the limiting groove 115. A pushing groove 116 is provided on the guide block 112. The push rod 1003 is slidably matched with the pushing groove 116, and the mating surface between the push rod 1003 and the pushing groove 116 is an inclined surface.

[0040] In the embodiment of the present invention, in the initial state, the compression spring III 113 pushes the guide block 112, and the guide block 112 drives the limit block 114 into the limit groove 115, thereby restricting the movement of the sealing plate 7, further restricting the sealing block 71 from opening the exhaust port 61 on the partition plate 6, and further stably blocking the exhaust ports 61 on the two partition plates 6; when the filter plate 4 contacts one of the partition plates 6 and the cross bar 93 continues to move, the cross bar 93 overcomes the elastic force of the compression spring II 1002 and drives the push rod 1003 to move relative to the filter plate 4. The push rod 1003 extends out of the filter plate 4 and extends into the push groove 116. The moving push rod 1003 can overcome the elastic force of the compression spring III 113 and drive the guide block 112 through the push groove 116. The guide block 112 drives the limit block 114 to disengage from the limit groove 115, thereby releasing the movement restriction of one of the sealing plates 7. At this time, the push rod 1003 stops moving, and the exhaust ports 61 on the two partition plates 6 are blocked by the sealing blocks 71. One of the sealing blocks 71 is restricted from disengaging from the exhaust port 61. As the waste gas in the treatment tank 1 is injected, the pressure in the treatment tank 1 increases. Until the high pressure in the treatment tank 1 overcomes the elastic force of the compression spring I 82 and pushes the sealing block 71 to disengage from the exhaust port 61, by pushing the opening of one of the exhaust ports 61 with high pressure, the air pressure of the waste gas in the treatment tank 1 can be increased. Under the high pressure state, the adsorption capacity of the activated carbon is improved. This is the high-pressure working state; when the push rod 1003 pushes the guide block 112 to continue moving, the push rod 1003 overcomes the elastic force of the compression spring I 82 and pushes the sealing plate 7 to move. The sealing plate 7 drives the sealing block 71 to disengage from the exhaust port 61. At this time, the exhaust port 61 of one of the partition plates 6 is opened, and the activated carbon layer 5 works under normal pressure. The self-locking assembly 11 can stably block the exhaust port 61 on the other partition plate 6; by controlling the moving distance of the cross bar 93, the adjustment of the working state of the activated carbon layer 5 is realized.

[0041] As Figures 1 - 6 shown, as a preferred embodiment of the present invention, the treatment tank 1 includes a tank body 101 and an end cover 102. The tank body 101 and the end cover 102 are fixedly connected by bolts. The three-way inlet pipe 2 includes a three-way main pipe 21 and a sub-pipe 22. One end of the three-way main pipe 21 and one end of the sub-pipe 22 are fixedly connected by bolts. The end of the sub-pipe 22 extends into one end of the treatment tank 1 and is fixed on one of the partition plates 6. One of the blocking pipes 12 is slidably connected in the sub-pipe 22. The second end of the three-way main pipe 21 extends into one end of the treatment tank 1 and is fixed on the other partition plate 6. The other blocking pipe 12 is slidably connected in the second end of the three-way main pipe 21. The guide columns 81 of the two groups of elastic pushing assemblies 8 are respectively fixed on the tank body 101 and the end cover 102.

[0042] In an embodiment of the present invention, the tank body 101 and the end cover 102 installed by bolts, as well as the three-way main pipe 21 and the auxiliary pipe 22, facilitate the replacement of the activated carbon layer 5. When replacing the activated carbon layer 5, the bolts connecting the tank body 101 and the end cover 102, as well as the three-way main pipe 21 and the auxiliary pipe 22, are removed, and the three-way main pipe 21, the end cover 102, and the upper sealing plate 7, the sealing block 71 and the elastic pushing component 8 are taken off, thereby facilitating the replacement of the activated carbon layer 5.

[0043] In the above embodiment of the present invention, a waste gas recovery device for PE pipe production is provided. In the initial state, the filter plate 4 is in contact with the lower partition plate 6. The exhaust groove 121 on the lower end sealing pipe 12 of the filter plate 4 is located in the three-way intake pipe 2. The lower end of the three-way intake pipe 2 is closed. The exhaust groove 121 on the upper end sealing pipe 12 of the filter plate 4 is separated from the three-way intake pipe 2. The upper end of the three-way intake pipe 2 is opened. The exhaust port 61 on the lower partition plate 6 is opened. At this time, the lower end of the activated carbon layer 5 is located in the exhaust port 61 of the lower partition plate 6. The exhaust port 61 on the upper partition plate 6 is closed. At this time, the waste gas enters between the upper partition plate 6 and the filter plate 4 through the upper end of the three-way intake pipe 2. The waste gas moves from top to bottom on the activated carbon layer 5. At this time, the upper end of the activated carbon layer 5 contacts the waste gas with a high concentration. After the waste gas is filtered by the activated carbon layer 5, it passes through the exhaust port 61 on the lower partition plate 6 and then is discharged from the lower end of the three-way exhaust pipe 3;

[0044] Then the motor 91 drives one of the lead screws 92 to rotate. This lead screw 92 drives one of the gears 97 to rotate. This gear 97 drives the external gear ring 96 to rotate. The external gear ring 96 drives another gear 97 to rotate. Another gear 97 drives another lead screw 92 to rotate, thereby synchronously rotating the two lead screws 92. The lead screw 92 drives the cross bar 93 to move up and down in a threaded transmission manner. The cross bar 93 drives the filter plate 4 to move upward through the second compression spring 1002. When the lower end of the filter plate 4 is not in contact with the lower partition plate 6, the first compression spring 82 pushes the sealing plate 7 to move. The sealing plate 7 drives the sealing block 71 to block the exhaust port 61 of the lower partition plate 6. At this time, the exhaust ports 61 on the two partition plates 6 are both blocked, and the gas in the treatment tank 1 cannot be discharged. The filter plate 4 drives the activated carbon layer 5 and the two sealing pipes 12 to move upward. The waste gas in the upper layer of the activated carbon layer 5 continues to be treated until the filter plate 4 moves to the exact middle of the two partition plates 6, as Figure 3As shown in the figure, at this time, the exhaust slots 121 of the two plugging pipes 12 are both located inside the two ends of the three-way intake pipe 2. The three-way intake pipe 2 is in a closed state, and the waste gas cannot enter the treatment tank 1. As the filter plate 4 continues to move upward, the exhaust slots 121 on the plugging pipes 12 at the lower end of the filter plate 4 are separated from the lower end of the three-way intake pipe 2. The waste gas in the three-way intake pipe 2 enters the treatment tank 1 from the lower end of the three-way intake pipe 2. At this time, there is waste gas at both the upper and lower ends of the filter plate 4 until the upper end of the filter plate 4 contacts the upper partition plate 6. The waste gas between the upper partition plate 6 and the filter plate 4 is completely squeezed below the filter plate 4. At this time, there is only waste gas below the filter plate 4.

[0045] When one end of the filter plate 4 contacts the upper partition plate 6, the cross bar 93 continues to move. The cross bar 93 overcomes the elastic force of the second compression spring 1002 and drives the push rod 1003 to move relative to the filter plate 4. The push rod 1003 extends out of the filter plate 4 and pushes the plugging plate 7. Then, the plugging plate 7 overcomes the elastic force of the first compression spring 82 and drives the plugging block 71 to disengage from the exhaust port 61. The exhaust port 61 on the upper partition plate 6 is opened. At this time, the waste gas below the filter plate 4 is filtered by the activated carbon layer 5 and discharged from the exhaust port 61 of the upper partition plate 6. The purified waste gas is discharged from the upper end of the three-way exhaust pipe 3. The waste gas moves upward from bottom to top on the activated carbon layer 5. At this time, the lower end of the activated carbon layer 5 contacts the waste gas with a high concentration. By moving the filter plate 4 and the activated carbon layer 5 up and down, the moving direction of the waste gas on the activated carbon layer 5 can be changed, so that both ends of the activated carbon layer 5 can be fully utilized. Moreover, when changing the direction of the waste gas passing through the activated carbon layer 5, it can play a role in backwashing the activated carbon layer 5, blowing out the blocked dust particles on the activated carbon layer 5, thereby avoiding the blockage of the activated carbon layer 5 and improving the purification efficiency of the activated carbon layer 5. When the filter plate 4 drives the upper or lower partition plate 6 above the activated carbon layer 5 to contact, the exhaust port 61 on the partition plate 6 in contact with the activated carbon layer 5 is opened. Then, when changing the flow direction of the waste gas, the waste gas on one side of the activated carbon layer 5 can be fully purified, avoiding the discharge of the waste gas without being fully purified, thereby improving the purification efficiency of the waste gas recovery device for PE pipe production.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A PE pipe production waste gas recovery device, comprising a treatment tank, characterized in that: Also includes: Two baffles fixed in the treatment tank, as well as a three-way air inlet pipe and a three-way exhaust pipe, wherein the baffles are provided with exhaust ports; Two ends of the three-way air inlet pipe penetrate into two ends of the treatment tank and are fixed on two partitions, and two ends of the three-way exhaust pipe penetrate into the treatment tank and are located on opposite sides of the two partitions; A filter plate is slidably connected in the treatment tank, the filter plate is located between two partitions, an activated carbon layer is installed on the filter plate, plugging tubes are fixed at both ends of the filter plate, exhaust grooves are arranged on the side walls of the plugging tubes, and the ends of the two plugging tubes are slidably connected to the two ends of the three-way air inlet pipe respectively; The processing tank is provided with a driving mechanism, and the driving mechanism is used to drive the filter plate to move up and down; Both partitions are provided with a blocking module for blocking the exhaust port. The filter plate is provided with a transmission assembly. When one end of the filter plate contacts one of the partitions, the transmission assembly drives the blocking module through a driving mechanism to open the exhaust port on the partition.

2. The PE pipe production waste gas recovery device according to claim 1 is characterized in that: The blocking module includes two blocking plates arranged in the processing tank, and the two blocking plates are respectively located on the opposite sides of the two partitions. Blocks are arranged on the two blocking plates, and the blocking blocks are consistent with the contour of the exhaust port. Two groups of elastic pushing components are arranged in the processing tank, and the elastic pushing components drive the blocking blocks to block the exhaust port through elastic force.

3. The PE pipe production waste gas recovery device according to claim 2 is characterized in that: Each group of the elastic pushing components includes two guide columns fixed in the processing tank, and the two guide columns are fixedly connected with a compression spring 1. The end of the compression spring 1 is fixed on the sealing plate, and the sealing plate is slidably connected to the guide columns.

4. The PE pipe production waste gas recovery device according to claim 2 is characterized in that: The driving mechanism includes a motor fixed at the bottom of the processing tank, and a screw rod rotatably connected to the end of the processing tank, the rotating end of the motor is fixedly connected to the screw rod, a sliding groove is provided on the side wall of the processing tank, the filter plate is slidably connected to the sliding groove, a sealing plate is fixed on the filter plate, the sealing plate is slidably connected to the side wall of the processing tank, a cross bar is transversely provided on the filter plate, and the screw rod is threadedly connected to the cross bar.

5. The PE pipe production waste gas recovery device according to claim 4 is characterized in that: Two screw rods are rotatably connected to the side wall of the processing tank, gears are fixed to the two screw rods, an outer gear ring is rotatably connected to the side wall of the processing tank, the outer gear ring is meshed with two gears at the same time, and the rotating end of the motor is connected to one of the screw rods.

6. The PE pipe production waste gas recovery device according to claim 4, characterized in that: The transmission assembly comprises a guide slide groove vertically arranged on the filter plate, the cross bar is slidably connected in the guide slide groove, and two compression springs and a push rod are fixed at both upper and lower ends of the cross bar.

7. The PE pipe production waste gas recovery device according to claim 6, characterized in that: The blocking plate is provided with a self-locking assembly, which includes a guide groove horizontally arranged in the blocking plate and a limit groove arranged on the partition plate, a guide block is slidably connected in the guide groove, and compression springs 3 and limit blocks are respectively fixed at both ends of the guide block, the compression springs 3 are arranged in the guide groove, the limit blocks extend into the blocking plate and cooperate with the limit groove, a push groove is arranged on the guide block, the push rod is slidably cooperated with the push groove, and the push rod and the push groove cooperation surface are inclined surfaces. .

8. The PE pipe production waste gas recovery device according to claim 3 is characterized in that: The processing tank includes a tank body and an end cover, and the tank body and the end cover are fixedly connected by bolts. The three-way air inlet pipe includes a three-way main pipe and a sub-pipe, and one end of the three-way main pipe is fixedly connected to one end of the sub-pipe by bolts. The end of the sub-pipe extends into one end of the processing tank and is fixed on one of the partitions, and one of the blocking tubes is slidably connected in the sub-pipe, and the second end of the three-way main pipe extends into one end of the processing tank and is fixed on another partition, and the other blocking tube is slidably connected in the second end of the three-way main pipe, and the guide columns of the two sets of elastic pushing components are respectively fixed on the tank body and the end cover.

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