A PE pipe production waste gas recovery device

Abstract

This invention relates to the field of waste gas treatment technology and provides a waste gas recovery device for PE pipe production. The device includes a treatment tank, two partitions fixed inside the tank, a three-way inlet pipe, and a three-way outlet pipe. The partitions are provided with exhaust ports. Two ends of the three-way inlet pipe pass through both ends of the treatment tank and are fixed to the two partitions. Two ends of the three-way outlet pipe pass through the treatment tank and are located on opposite sides of the two partitions. A filter plate is slidably connected inside the treatment tank, positioned between the two partitions. By moving the filter plate and the activated carbon layer up and down, the direction of waste gas movement on the activated carbon layer can be changed, ensuring that both ends of the activated carbon layer are fully utilized. Changing the direction of waste gas passing through the activated carbon layer can backwash the activated carbon layer, blowing out dust particles that clog it, thus preventing blockage and improving the purification efficiency of the activated carbon layer.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, and in particular relates to a waste gas recovery device for PE pipe production. Background Technology

[0002] The waste gas generated during the production of PE pipes mainly includes volatile organic compounds (VOCs), pyrolytic small molecules, smoke and odors. In order 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 from the waste gas, reducing the burden on subsequent treatment. Cooling and dehumidification refers to cooling and dehumidifying the high-temperature waste gas to facilitate subsequent purification of organic waste gas. Among them, activated carbon adsorption is often used for organic waste gas treatment. Activated carbon has a strong adsorption capacity and can effectively remove organic matter from the waste gas.

[0004] When using activated carbon layers to treat organic waste gas, the waste gas enters one side of the activated carbon layer and then exits from the other side. The concentration of waste gas in contact with the two sides of the activated carbon layer is different, resulting in a significant difference in the utilization of the activated carbon on both sides of the activated carbon layer. The activated carbon on the side where the waste gas enters is easily clogged after being overused, reducing the waste gas treatment efficiency, while the other side is not fully utilized, resulting in the activated carbon layer not being fully utilized. Summary of the Invention

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

[0006] This invention is implemented as follows: a PE pipe production waste gas recovery device 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. The partitions are provided with exhaust ports. Two ends of the three-way inlet pipe respectively penetrate into both ends of the treatment tank and are fixed to 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, located between the two partitions. An activated carbon layer is installed on the filter plate. Both ends of the filter plate are fixed with sealing pipes, and exhaust grooves are provided on the sidewalls of the sealing pipes. The ends of the two sealing pipes are slidably connected to the two ends of the three-way inlet pipe. A driving mechanism is provided on the treatment tank to drive the filter plate to move up and down. Each of the two partitions is provided with a sealing module for sealing 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 through the driving mechanism to open the exhaust port on that partition.

[0007] A further technical solution includes two sealing plates installed inside the treatment tank. The two sealing plates are located on opposite sides of two partitions. Each of the two sealing plates is provided with a sealing block. The sealing block is consistent with the outline of the exhaust port. The treatment tank is provided with two sets of elastic pushing components. The elastic pushing components drive the sealing block to block the exhaust port through elastic force.

[0008] In a further technical solution, each set of elastic pushing components includes two guide pillars fixed inside the processing tank, and a compression spring is fixedly connected to each of the two guide pillars. The end of the compression spring is fixed to the sealing plate, and the sealing plate is slidably connected to the guide pillar.

[0009] A further technical solution includes a driving mechanism comprising a motor fixed to the bottom of the processing tank and a lead screw rotatably connected to the end of the processing 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 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 crossbar is provided transversely on the filter plate. The lead screw is threadedly connected to the crossbar.

[0010] In a further technical solution, two lead screws are rotatably connected to the side wall of the processing tank, and gears are fixed on both lead screws. An external gear ring is rotatably connected to the side wall of the processing tank, and the external gear ring meshes with both gears simultaneously. The rotating end of the motor is connected to one of the lead screws.

[0011] In a further technical solution, the transmission assembly includes a vertically arranged guide groove on the filter plate, the crossbar is slidably connected in the guide groove, and both the upper and lower ends of the crossbar are fixed with a compression spring and a push rod.

[0012] A further technical solution includes a self-locking assembly on the sealing plate. The self-locking assembly includes a horizontally arranged guide groove inside the sealing plate and a limiting groove on the partition plate. A guide block is slidably connected inside the guide groove. A compression spring and a limiting block are respectively fixed at both ends of the guide block. The compression spring is disposed inside the guide groove. The limiting block extends into the sealing plate and cooperates with the limiting groove. A pushing groove is provided on the guide block. The push rod is slidably cooperated with the pushing groove, and the cooperation surface between the push rod and the pushing groove is an inclined surface.

[0013] A further technical solution includes a treatment tank comprising a tank body and an end cap, the tank body and the end cap being fixedly connected by bolts. The three-way air inlet pipe comprises a three-way main pipe and a secondary pipe, one end of the three-way main pipe and one end of the secondary pipe being fixedly connected by bolts. The end of the secondary pipe extends into one end of the treatment tank and is fixed to one of the partitions. One of the sealing pipes is slidably connected inside the secondary pipe. The second end of the three-way main pipe extends into one end of the treatment tank and is fixed to another partition. The other sealing pipe is slidably connected inside the second end of the three-way main pipe. The guide posts of the two sets of elastic pushing components are respectively fixed on the tank body and the end cap.

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

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

[0016] 2. Changing the direction of exhaust gas passing through the activated carbon layer can backwash the activated carbon layer, blowing out the dust particles that clog the activated carbon layer, thereby preventing the activated carbon layer from clogging and improving the purification efficiency of the activated carbon layer.

[0017] 3. Under the action of the self-locking component, the working state of the activated carbon layer can be adjusted by controlling the movement distance of the crossbar, and the activated carbon layer can switch between high pressure and normal pressure working states.

[0018] 4. When the filter plate brings the upper or lower baffle of the activated carbon layer into contact, the exhaust port on the baffle in contact with the activated carbon layer opens. This allows for thorough purification of the waste gas on one side of the activated carbon layer when the direction of waste gas flow is changed, preventing the waste gas from being discharged before it is fully purified, thereby improving the purification efficiency of the PE pipe production waste gas recovery device. Attached Figure Description

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

[0020] Figure 2 Provided by the present invention Figure 1 Schematic diagram of the intermediate processing tank;

[0021] Figure 3 Provided by the present invention Figure 1 Schematic diagram of the internal structure of the intermediate processing tank;

[0022] Figure 4 Provided by the present invention Figure 3 A schematic diagram of the structure of the three-way intake pipe, the three-way exhaust pipe, and the baffle.

[0023] Figure 5 Provided by the present invention Figure 3 Schematic diagram of the middle sealing plate;

[0024] Figure 6 Provided by the present invention Figure 3 Schematic diagram of the middle filter plate;

[0025] Figure 7 Provided by the present invention Figure 6 Schematic diagram of the internal structure of the filter plate;

[0026] Figure 8 Provided by the present invention Figure 1 A schematic diagram of the drive mechanism;

[0027] Figure 9 Provided by the present invention Figure 5 Schematic diagram of the internal structure of the sealing plate;

[0028] Figure 10 Provided by the present invention Figure 9 A magnified structural diagram of A in the diagram.

[0029] In the attached diagram: 1. Processing tank; 101. Tank body; 102. End cap; 2. Three-way inlet pipe; 21. Three-way main pipe; 22. Secondary pipe; 3. Three-way exhaust pipe; 4. Filter plate; 5. Activated carbon layer; 6. Baffle plate; 61. Exhaust port; 7. Sealing plate; 71. Sealing block; 8. Elastic push assembly; 81. Guide column; 82. Compression spring one; 9. Drive mechanism; 91. Motor; 92. Lead screw; 93. 94. Crossbar; 95. Sliding groove; 96. Sealing plate; 97. External gear ring; 98. Gear; 10. Transmission assembly; 1001. Guide groove; 1002. Compression spring II; 1003. Push rod; 11. Self-locking assembly; 111. Guide groove; 112. Guide block; 113. Compression spring III; 114. Limiting block; 115. Limiting groove; 116. Pushing groove; 12. Sealing pipe; 121. Exhaust groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] like Figures 1-6 As shown, an embodiment of the present invention provides a PE pipe production waste gas recovery device, including a treatment tank 1, and further including: two partitions 6 fixed inside the treatment tank 1, a three-way inlet pipe 2 and a three-way exhaust pipe 3. The partitions 6 are provided with exhaust ports 61; two ends of the three-way inlet pipe 2 respectively pass through two ends of the treatment tank 1 and are fixed to the two partitions 6, and the remaining end of the three-way inlet pipe 2 is connected to a waste gas pipeline; two ends of the three-way exhaust pipe 3 respectively pass through the treatment tank 1 and are located on opposite sides of the two partitions 6, and the remaining end of the three-way exhaust pipe 3 is connected to an exhaust pipeline; a filter plate 4 is slidably connected inside the treatment tank 1, and the filter plate 4 is located between the two partitions 6. Between the partitions 6, an activated carbon layer 5 is installed on the filter plate 4. Both ends of the filter plate 4 are fixed with a sealing tube 12. The side wall of the sealing tube 12 is provided with an exhaust groove 121. The ends of the two sealing tubes 12 are slidably connected to one end of the three-way air inlet pipe 2. The treatment tank 1 is provided with a driving mechanism 9, which is used to drive the filter plate 4 to move up and down. Both partitions 6 are provided with a sealing module, which is used to seal the exhaust port 61. The filter plate 4 is provided with a transmission component 10. When one end of the filter plate 4 contacts one of the partitions 6, the transmission component 10 drives the sealing module to open the exhaust port 61 on the partition 6 through the driving mechanism 9.

[0033] In this embodiment of the invention, in the initial state, the filter plate 4 is in contact with the lower partition 6. The exhaust groove 121 on the lower end of the filter plate 4 sealing pipe 12 is located inside the three-way air inlet pipe 2. The lower end of the three-way air inlet pipe 2 is closed. The exhaust groove 121 on the upper end of the filter plate 4 sealing pipe 12 is disengaged from the three-way air inlet pipe 2. The upper end of the three-way air inlet pipe 2 is opened. The lower sealing module opens the exhaust port 61 on the lower partition 6. At this time, the lower end of the activated carbon layer 5 is located inside the exhaust port 61 of the lower partition 6. The upper sealing module closes the exhaust port 61 on the upper partition 6. At this time, the exhaust gas enters between the upper partition 6 and the filter plate 4 through the upper end of the three-way air 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 has a high concentration of exhaust gas. After being filtered by the activated carbon layer 5, the exhaust gas passes through the exhaust port 61 on the lower partition 6 and is then discharged from the lower end of the three-way exhaust pipe 3.

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

[0035] like Figures 1-6As shown, in a preferred embodiment of the present invention, the sealing module includes two sealing plates 7 disposed inside the processing tank 1. The two sealing plates 7 are located on opposite sides of the two partitions 6, and each of the two sealing plates 7 is provided with a sealing block 71. The sealing block 71 has the same outline as the exhaust port 61. The processing tank 1 is provided with two sets of elastic pushing components 8. The elastic pushing components 8 drive the sealing block 71 to block the exhaust port 61 through elastic force. Each set of elastic pushing components 8 includes two guide posts 81 fixed inside the processing tank 1. Each guide post 81 is fixedly connected with a compression spring 82. The end of the compression spring 82 is fixed to the sealing plate 7, and the sealing plate 7 is slidably connected to the guide post 81.

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

[0037] like Figures 1-8 As shown, in a preferred embodiment of the present invention, the driving mechanism 9 includes a motor 91 fixed to the bottom of the processing tank 1 and a lead screw 92 rotatably connected to the end of the processing tank 1. The rotating end of the motor 91 is fixedly connected to the lead screw 92. A sliding groove 94 is provided on the side wall of the processing tank 1. The filter plate 4 is slidably connected to 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 processing tank 1. A crossbar 93 is transversely provided on the filter plate 4. The lead screw 92 is threadedly connected to the crossbar 93. Two lead screws 92 are rotatably connected to the side wall of the treatment tank 1, and gears 97 are fixed on both lead screws 92. An external gear ring 96 is rotatably connected to the side wall of the treatment tank 1, and the external gear ring 96 meshes with both gears 97 simultaneously. The rotating end of the motor 91 is connected to one of the lead screws 92. The transmission assembly 10 includes a guide groove 1001 vertically arranged on the filter plate 4. The crossbar 93 is slidably connected in the guide groove 1001. Compression springs 1002 and push rods 1003 are fixed at both the upper and lower ends of the crossbar 93.

[0038] In this embodiment of the invention, motor 91 drives one of the lead screws 92 to rotate, which in turn drives one of the gears 97 to rotate. This gear 97 drives an external gear ring 96 to rotate, which in turn drives another gear 97 to rotate. The other gear 97 then drives the other lead screw 92 to rotate, thus causing the two lead screws 92 to rotate synchronously. The lead screws 92 drive the crossbar 93 to move up and down via a threaded transmission. The crossbar 93 drives the filter plate 4 to move via a compression spring 1002. When the filter plate 4 moves, it drives the sealing plate 95. The sealing plate 95 moves and blocks the sliding groove 94, thereby preventing the exhaust gas in the treatment tank 1 from leaking out of the sliding groove 94 and improving the sealing performance of the treatment tank 1. When the filter plate 4 contacts one of the partitions 6, the crossbar 93 continues to move. The crossbar 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 from the filter plate 4 and pushes the sealing plate 7, thereby causing the sealing plate 7 to overcome the elastic force of the first compression spring 82 and drive the sealing block 71 to disengage from the exhaust port 61, and the exhaust port 61 on the partition 6 is opened.

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

[0040] In this embodiment of the invention, in the initial state, the compression spring 113 pushes the guide block 112, and the guide block 112 drives the limiting block 114 into the limiting groove 115, thereby restricting the movement of the sealing plate 7, thereby restricting the sealing block 71 from opening the exhaust port 61 on the partition 6, so that the exhaust ports 61 on both partitions 6 are stably blocked; when the filter plate 4 contacts one of the partitions 6, and the crossbar 93 continues to move, the crossbar 93 overcomes the elastic force of the compression spring 1002 and carries The push rod 1003 moves relative to the filter plate 4, extending out of the filter plate 4 and into the push groove 116. The moving push rod 1003, passing through the push groove 116, overcomes the elastic force of the compression spring 113 and drives the guide block 112. The guide block 112 drives the limiting block 114 to disengage from the limiting groove 115, thereby releasing the movement restriction of one of the sealing plates 7. At this point, the push rod 1003 stops moving, and the exhaust ports 61 on both partitions 6 are open. The block is blocked by the sealing block 71, and one of the sealing blocks 71 is restricted from leaving the exhaust port 61. As the waste gas is injected into the treatment tank 1, the pressure inside the treatment tank 1 increases until the high pressure inside the treatment tank 1 overcomes the elastic force of the compression spring 82 and pushes the sealing block 71 out of the exhaust port 61. The opening of one of the exhaust ports 61 by the high pressure can increase the waste gas pressure inside the treatment tank 1. The adsorption capacity of activated carbon is improved under high pressure. This is the high pressure working state. When the push rod 1003 pushes the guide block 112 to continue to move, the push rod 1003 overcomes the elastic force of the compression spring 82 and pushes the sealing plate 7 to move. The sealing plate 7 drives the sealing block 71 to leave the exhaust port 61. At this time, the exhaust port 61 of one of the partitions 6 is opened. The activated carbon layer 5 works under normal pressure. The self-locking component 11 can stably block the exhaust port 61 on the other partition 6. The working state of the activated carbon layer 5 can be adjusted by controlling the moving distance of the crossbar 93.

[0041] like Figures 1-6 As shown, in a preferred embodiment of the present invention, the processing tank 1 includes a tank body 101 and an end cap 102, which are fixedly connected by bolts. The three-way air inlet pipe 2 includes a three-way main pipe 21 and a secondary pipe 22. One end of the three-way main pipe 21 is fixedly connected to one end of the secondary pipe 22 by bolts. The end of the secondary pipe 22 extends into one end of the processing tank 1 and is fixed to one of the partitions 6. One of the sealing pipes 12 is slidably connected inside the secondary pipe 22. The second end of the three-way main pipe 21 extends into one end of the processing tank 1 and is fixed to another partition 6. The other sealing pipe 12 is slidably connected inside the second end of the three-way main pipe 21. The guide posts 81 of the two sets of elastic pushing components 8 are respectively fixed to the tank body 101 and the end cap 102.

[0042] In this embodiment of the invention, the tank body 101 and end cap 102, as well as the tee main pipe 21 and secondary pipe 22, which are bolted together, facilitate the replacement of the activated carbon layer 5. When replacing the activated carbon layer 5, the bolts connecting the tank body 101 and end cap 102, as well as the tee main pipe 21 and secondary pipe 22, are removed, and the tee main pipe 21 and end cap 102, as well as the sealing plate 7, sealing block 71 and elastic pushing assembly 8 above are removed, thereby facilitating the replacement of the activated carbon layer 5.

[0043] The above embodiments of the present invention provide a PE pipe production waste gas recovery device. In the initial state, the filter plate 4 is in contact with the lower partition 6. The exhaust groove 121 on the lower end of the filter plate 4 sealing pipe 12 is located in the three-way air inlet pipe 2. The lower end of the three-way air inlet pipe 2 is closed. The exhaust groove 121 on the upper end of the filter plate 4 sealing pipe 12 is disengaged from the three-way air inlet pipe 2. The upper end of the three-way air inlet pipe 2 is open. The exhaust port 61 on the lower partition 6 is open. At this time, the lower end of the activated carbon layer 5 is located in the exhaust port 61 of the lower partition 6. The exhaust port 61 on the upper partition 6 is closed. At this time, the waste gas enters between the upper partition 6 and the filter plate 4 through the upper end of the three-way air inlet 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 is in contact with a large concentration of waste gas. After being filtered by the activated carbon layer 5, the waste gas passes through the exhaust port 61 on the lower partition 6 and is then discharged from the lower end of the three-way exhaust pipe 3.

[0044] Then, motor 91 drives one of the lead screws 92 to rotate, which in turn drives one of the gears 97 to rotate. This gear 97 drives the external gear ring 96 to rotate, which in turn drives the other gear 97 to rotate. The other gear 97 then drives the other lead screw 92 to rotate, thus causing the two lead screws 92 to rotate synchronously. The lead screw 92 drives the crossbar 93 to move up and down through a threaded transmission. The crossbar 93 drives the filter plate 4 to move upward through the compression spring 1002. When the lower end of the filter plate 4 is not in contact with the lower partition 6, the 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 6. At this time, the exhaust ports 61 on both partitions 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 sealing pipes 12 to move upward. The waste gas on the upper layer of the activated carbon layer 5 continues to be treated until the filter plate 4 moves to the middle of the two partitions 6. Figure 3As shown, at this time, the exhaust grooves 121 of the two sealing pipes 12 are located in one of the two ends of the three-way air inlet pipe 2. The three-way air inlet pipe 2 is in a closed state, and the exhaust gas cannot enter the treatment tank 1. As the filter plate 4 continues to move upward, the exhaust grooves 121 on the sealing pipe 12 at the lower end of the filter plate 4 are separated from the lower end of the three-way air inlet pipe 2. The exhaust gas in the three-way air inlet pipe 2 enters the treatment tank 1 from the lower end of the three-way air inlet pipe 2. At this time, there is exhaust 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 6. The exhaust gas between the upper partition 6 and the filter plate 4 is completely squeezed into the lower part of the filter plate 4. At this time, there is only exhaust gas in the lower part of the filter plate 4.

[0045] When one end of the filter plate 4 contacts the upper partition 6, the crossbar 93 continues to move. The crossbar 93 overcomes the elastic force of the compression spring 1002 and drives the push rod 1003 to move relative to the filter plate 4. The push rod 1003 extends out from the filter plate 4 and pushes the sealing plate 7, thereby causing the sealing plate 7 to overcome the elastic force of the compression spring 82 and drive the sealing block 71 to disengage from the exhaust port 61. The exhaust port 61 on the upper partition 6 is opened. At this time, the exhaust 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 6. The purified exhaust gas is discharged from the upper end of the three-way exhaust pipe 3. The exhaust gas moves from bottom to top on the activated carbon layer 5. At this time, the lower end of the activated carbon layer 5 is in contact with a high concentration of exhaust gas. The exhaust gas passes through the filter plate 4 and the activated carbon layer 6. The up-and-down movement of the activated carbon layer 5 can change the direction of the waste gas flow on the activated carbon layer 5, thereby making full use of both ends of the activated carbon layer 5. When the direction of the waste gas passing through the activated carbon layer 5 is changed, it can backwash the activated carbon layer 5, blowing out the dust particles that are clogging the activated carbon layer 5, thus preventing the activated carbon layer 5 from becoming clogged and improving the purification efficiency of the activated carbon layer 5. When the filter plate 4 drives the upper or lower partition plate 6 of the activated carbon layer 5 to contact, the exhaust port 61 on the partition plate 6 in contact with the activated carbon layer 5 opens. Thus, when the direction of the waste gas flow is changed, the waste gas on one side of the activated carbon layer 5 can be fully purified, preventing the waste gas from being discharged without being fully purified, thereby improving the purification efficiency of the PE pipe production waste gas recovery device.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within 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: The tank contains two horizontally fixed partitions, a three-way air inlet pipe, and a three-way air outlet pipe, with exhaust ports provided on the partitions. Two ends of the three-way intake pipe are inserted into the upper and lower ends of the treatment tank respectively and are vertically fixed to the two partitions. The pipe opening is connected to the space between the two partitions. Two ends of the three-way exhaust pipe are inserted into the treatment tank respectively 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 two partitions. An activated carbon layer is installed on the filter plate. A sealing pipe is fixed at both the upper and lower ends of the filter plate. An exhaust groove is provided on the side wall of the sealing pipe. The ends of the two sealing pipes are slidably connected to the pipe openings at both ends of the three-way air inlet pipe. The processing tank is equipped with a drive mechanism, which is used to move the filter plate up and down. Both partitions are equipped with sealing modules, which are used to block the exhaust ports. The filter plate is equipped with a transmission component. 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 that partition through the drive mechanism. The processing tank is equipped with two sets of elastic pushing components, which use elastic force to drive the sealing module to block the exhaust port. The driving mechanism includes a motor fixed to the bottom of the processing tank and a lead screw rotatably connected to the end of the processing 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 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 crossbar is provided transversely on the filter plate. The lead screw is threadedly connected to the crossbar. The transmission assembly includes a guide groove vertically arranged on the filter plate, and a crossbar slidably connected in the guide groove. Both the upper and lower ends of the crossbar are fixed with a compression spring and a push rod. The ends of the upper and lower compression springs away from the crossbar are in contact with the upper and lower ends of the guide groove, respectively, and the push rod can extend out of the filter plate.

2. The PE pipe production waste gas recovery device according to claim 1, characterized in that, The sealing module includes two sealing plates installed inside the treatment tank. The two sealing plates are located on opposite sides of the two partitions. Each of the two sealing plates is provided with a sealing block, and the sealing block is consistent with the outline of the exhaust port.

3. The PE pipe production waste gas recovery device according to claim 2, characterized in that, Each set of elastic actuation components includes two guide pillars fixed inside the treatment tank. Each guide pillar is fixedly connected with a compression spring. The end of the compression spring is fixed to a sealing plate, and the sealing plate is slidably connected to the guide pillar.

4. The PE pipe production waste gas recovery device according to claim 1, characterized in that, Two lead screws are rotatably connected to the side wall of the processing tank, and gears are fixed on both lead screws. An external gear ring is rotatably connected to the side wall of the processing tank, and the external gear ring meshes with both gears simultaneously. The rotating end of the motor is connected to one of the lead screws.

5. The PE pipe production waste gas recovery device according to claim 1, characterized in that, The sealing plate is provided with a self-locking assembly, which includes a horizontally arranged guide groove inside the sealing plate and a limiting groove on the partition plate. A guide block is slidably connected in the guide groove. A compression spring and a limiting block are respectively fixed at both ends of the guide block. The compression spring is arranged in the guide groove. The limiting block extends out of the sealing plate and cooperates with the limiting groove. A pushing groove is provided on the guide block. The push rod is slidably cooperated with the pushing groove, and the cooperation surface between the push rod and the pushing groove is an inclined surface.

6. The PE pipe production waste gas recovery device according to claim 3, characterized in that, The treatment tank includes a tank body and an end cap, which are fixedly connected by bolts. The three-way air inlet pipe includes a main three-way pipe and a secondary three-way pipe. One end of the main three-way pipe and one end of the secondary three-way pipe are fixedly connected by bolts. The end of the secondary three-way pipe extends into one end of the treatment tank and is fixed to one of the partitions. One of the sealing pipes is slidably connected inside the secondary three-way pipe. The second end of the main three-way pipe extends into one end of the treatment tank and is fixed to another partition. The other sealing pipe is slidably connected inside the second end of the main three-way pipe. The guide posts of the two sets of elastic pushing components are respectively fixed on the tank body and the end cap.

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