Waste gas emission structure of plastic production workshop
By introducing components such as Venturi hoods, water collection tanks, pressure sensors, and cyclone dehumidifiers into the exhaust gas structure of the plastic production workshop, the problem of low treatment efficiency for high humidity and highly fluctuating exhaust gases has been solved, achieving stable and efficient exhaust gas capture and compliant emissions, and extending the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG DINGTAI PLASTIC PROD CO LTD
- Filing Date
- 2025-03-14
- Publication Date
- 2026-04-14
AI Technical Summary
Existing exhaust gas emission structures in plastic production workshops have low capture efficiency when faced with high humidity and highly fluctuating exhaust gases. Furthermore, the venturi hood openings are prone to water accumulation and wind speed reduction, making effective treatment impossible and resulting in exhaust gas escape and pollutant emissions failing to meet standards.
The system employs a combination of a venturi hood, a water collection tank, a lightweight float, a pressure sensor, and a frequency converter. The water collection tank collects moisture, the pressure sensor monitors the exhaust gas pressure and adjusts the airflow, a cyclone dehumidifier removes water vapor, and a servo motor-driven pipe cleaning mechanism cleans dirt, ensuring stable system operation.
It improves the efficiency of waste gas capture, prevents moisture from affecting the treatment effect, enhances the stability and sealing of the system, ensures that waste gas is discharged in compliance with standards, and extends the service life of the equipment.
Smart Images
Figure CN224113667U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste gas emission structure technology, and in particular to a waste gas emission structure for a plastic production workshop. Background Technology
[0002] Polyethylene is a thermoplastic made from ethylene monomers through polymerization. It has the advantages of being tough, flexible, and having excellent insulation properties. Thanks to its good processing performance, polyethylene can be made into various plastic products through blow molding, injection molding, and extrusion molding processes, which greatly facilitates people's lives and production activities. The production of polyethylene depends on plastic production workshops.
[0003] The construction of plastic production workshops facilitates centralized management. However, the plastic production process generates a large amount of complex waste gas, including volatile organic compounds such as ethylene and propylene. Direct emission of this waste gas not only harms the ecological balance but also causes respiratory diseases among workshop workers. Therefore, in order to reduce waste gas pollution and protect the production environment and the health of personnel, people have optimized and upgraded the waste gas emission system of plastic production workshops to ensure that the waste gas can be effectively treated and discharged in compliance with standards.
[0004] Although the traditional exhaust gas structure of plastic production workshops has been improved, the hood openings of the gas collection hoods have not been able to completely cover the pollution source, causing exhaust gas to escape. Moreover, when the wind speed at the hood opening is lower than the standard requirements, it cannot effectively capture exhaust gas. The existing solution is to use a Venturi gas collection hood combined with a baffle plate to cover the pollution source by increasing the hood opening area, increasing the wind speed, and adding a barrier structure to enhance the capture efficiency, thereby improving the exhaust gas capture rate and reducing fugitive emissions. However, when facing high humidity exhaust gas, water easily accumulates at the Venturi hood opening, leading to a decrease in wind speed. When facing highly fluctuating exhaust gas with large flow fluctuations, the negative pressure at the Venturi hood opening becomes unbalanced, and the capture efficiency decreases. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a waste gas emission structure for plastic production workshops, aiming to improve the problem that the existing technology cannot cope with high humidity waste gas and highly fluctuating waste gas.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a waste gas emission structure for a plastic production workshop, comprising an exhaust pipe one and an exhaust pipe two. A venturi shroud is fixedly connected to the left side of the inner wall of the exhaust pipe one. A water collection trough is formed on the left side of the inner bottom wall of the exhaust pipe one. A drain pipe is connected to the inner bottom wall of the water collection trough. Two guide plates are fixedly connected to the inner bottom wall of the water collection trough. The same lightweight float is slidably connected to the inner wall of both guide plates. A sealing plug is fixedly connected to the bottom of the lightweight float. The right side of the venturi shroud... A pressure sensor is fixedly connected to the rear end of the venturi cover. A frequency converter is fixedly connected to the rear left end of the venturi cover. An exhaust fan is fixedly connected to the left side of the inner bottom wall of the second exhaust pipe. A cyclone dehumidifier is fixedly connected to the right side of the inner bottom wall of the second exhaust pipe. An infrared monitor is fixedly connected to the top right end of the venturi cover. An inspection cover is rotatably connected to the front outer wall of the first exhaust pipe. A mounting groove is opened on the right side of the inner wall of the first exhaust pipe. A pipe cleaning mechanism is provided on the inner wall of the first exhaust pipe. The pipe cleaning mechanism is used to clean the dirt inside the exhaust pipe.
[0007] As a further description of the above technical solution:
[0008] The pipe cleaning mechanism includes a servo motor, the bottom of which is fixedly connected to the inner bottom wall of the placement groove. A gear is fixedly connected to the output end of the servo motor. A sliding groove is provided on the rear side of the inner wall of the exhaust pipe. A lead screw is rotatably connected to the inner wall of the sliding groove. Multiple keyways are provided on the outer right end of the lead screw. A slider is threadedly connected to the outer side of the lead screw. A scraper is fixedly connected to the front side of the slider.
[0009] As a further description of the above technical solution:
[0010] A water level sensor is fixedly connected to the top of each of the two guide plates, and a buzzer is fixedly connected to the top of the first exhaust pipe.
[0011] As a further description of the above technical solution:
[0012] An observation hole is provided in the middle of the outer side of the inspection cover, and an observation window is fixedly connected to the inner wall of the observation hole.
[0013] As a further description of the above technical solution:
[0014] Two electric door openers are fixedly connected to the front side of the outer wall of the exhaust pipe, and a safety lock is fixedly connected to the top front side of the inspection cover.
[0015] As a further description of the above technical solution:
[0016] Two rotating shafts are fixedly connected to the bottom front side of the inspection cover, and two pins are fixedly connected to the front outer wall of the exhaust pipe.
[0017] As a further description of the above technical solution:
[0018] A hydrophobic coating plate is fixedly connected to the right end of the venturi cover. The hydrophobic coating plate is made of double-sided material.
[0019] As a further description of the above technical solution:
[0020] A sealing gasket is fixedly connected to the outside of the inspection cover, and the size of the sealing gasket is the same as the outer size of the inspection cover.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, the venturi hood blocks moisture and impurities in the high-humidity exhaust gas. The moisture condenses and falls into the water collection tank. When the amount of water increases, the lightweight float moves the sealing plug away from the drain pipe, allowing the water to flow out. Furthermore, when encountering highly fluctuating exhaust gas, the pressure sensor monitors the pressure on the venturi hood, and the frequency converter controls the speed of the exhaust fan, thus avoiding the impact of moisture on exhaust gas treatment and improving the exhaust gas collection efficiency.
[0023] 2. In this utility model, the servo motor is started to drive the gear to rotate. Because the gear has a meshing connection with multiple keyways, and the lead screw is rotated in the slide groove, the lead screw can rotate synchronously with the rotation of the gear. Because the slider slides on the lead screw, the slide groove has a guiding effect on the slider, so that the slider can move left and right, thereby driving the scraper to move in the exhaust pipe, thereby cleaning the dirt in the exhaust pipe. Attached Figure Description
[0024] Figure 1 This is a perspective view of a waste gas emission structure for a plastic production workshop proposed in this utility model.
[0025] Figure 2 This is a cross-sectional view of the drainage pipe of a waste gas emission structure in a plastic production workshop according to the present invention.
[0026] Figure 3 This is a cross-sectional view of the exhaust pipe of a waste gas emission structure for a plastic production workshop proposed in this utility model.
[0027] Figure 4 This is a schematic diagram of a Venturi hood for exhaust gas structure in a plastic production workshop, as proposed in this utility model.
[0028] Figure 5 This is a schematic diagram of the pipe cleaning mechanism for a waste gas emission structure in a plastic production workshop, as proposed in this utility model.
[0029] Legend:
[0030] 1. Exhaust pipe one; 2. Exhaust pipe two; 3. Pipe cleaning mechanism; 301. Servo motor; 302. Gear; 303. Slide groove; 304. Lead screw; 305. Keyway; 306. Slider; 307. Scraper; 4. Venturi cover; 5. Water collection tank; 6. Drain pipe; 7. Guide plate; 8. Lightweight float; 9. Sealing plug; 10. Pressure sensor; 11. Frequency converter; 12. Exhaust fan; 13. Infrared monitor; 14. Cyclone dehumidifier; 15. Inspection cover; 16. Hydrophobic coating plate; 17. Sealing gasket; 18. Water level sensor; 19. Buzzer; 20. Installation slot; 21. Observation hole; 22. Observation window; 23. Electric door opener; 24. Safety lock; 25. Rotating shaft; 26. Pin. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a waste gas emission structure for a plastic production workshop, including an exhaust pipe 1 and an exhaust pipe 2. A venturi shroud 4 is fixedly connected to the left side of the inner wall of the exhaust pipe 1. The venturi shroud 4 expands the shroud opening area, preventing pollutants from escaping. Furthermore, the venturi shroud 4 is tilted to allow accumulated water to flow downwards. A water collection trough 5 is formed on the left side of the inner bottom wall of the exhaust pipe 1. The water collection trough 5 is used to collect water intercepted by the venturi shroud 4. A drain pipe 6 is connected to the inner bottom wall of the water collection trough 5, through which water in the water collection trough 5 is discharged. Two... Two guide plates 7 allow the lightweight float 8 to move only up and down. The inner walls of both guide plates 7 are slidably connected to the same lightweight float 8. When there is a large amount of water in the water tank 5, the lightweight float 8 can be moved upwards. A sealing plug 9 is fixedly connected to the bottom of the lightweight float 8 to prevent exhaust gas from escaping from the drain pipe 6. A pressure sensor 10 is fixedly connected to the rear right end of the venturi shroud 4 to monitor the pressure of the exhaust gas in the exhaust pipe 1. A frequency converter 11 is fixedly connected to the rear left end of the venturi shroud 4. The frequency converter 11 is used for... The power of the exhaust fan 12 is adjusted to control the airflow speed inside exhaust pipe 1. The exhaust fan 12 is fixedly connected to the left side of the inner bottom wall of exhaust pipe 2, which directs the exhaust gas from exhaust pipe 1 to exhaust pipe 2. A cyclone dehumidifier 14 is fixedly connected to the right side of the inner bottom wall of exhaust pipe 2, which absorbs moisture to prevent moisture from remaining in the exhaust gas after filtration by venturi 4. An infrared monitor 13 is fixedly connected to the top right end of venturi 4, which can detect the condition inside exhaust pipe 1. The front side of the outer wall of exhaust pipe 1... The exhaust pipe 1 is rotatably connected to an inspection cover 15, through which the components inside the exhaust pipe 1 are inspected. The right side of the inner wall of the exhaust pipe 1 is provided with a mounting groove 20, which provides space for the servo motor 301. The inner wall of the exhaust pipe 1 is provided with a pipe cleaning mechanism 3, which is used to clean the dirt inside the exhaust pipe. The right end of the venturi cover 4 is fixedly connected to a hydrophobic coating plate 16, which is made of double-sided material. The hydrophobic coating plate 16 can prevent moisture and impurities in the high humidity exhaust gas from forming dirt that sticks to the venturi cover 4, thus increasing the service life of the venturi cover 4.
[0033] Specifically, the exhaust fan 12 is turned on via the controller, and the exhaust fan 12 starts working, generating negative pressure in the exhaust pipe 1, which draws the exhaust gas in the workshop into the exhaust pipe 1. After entering the exhaust pipe 1, the exhaust gas first comes into contact with the tilted venturi 4. The venturi 4 enlarges the opening area, improving the collection efficiency of the exhaust gas and making it difficult for pollutants to escape. At the same time, because the venturi 4 is tilted, the moisture and impurities carried in the exhaust gas slide down the surface of the venturi 4 under the action of gravity. The slid-down water flows into the water collection tank 5. When the water level reaches a certain height, the buoyancy of the water causes the lightweight float 8 to move upward. The sealing plug 9, which is fixedly connected to the bottom of the lightweight float 8, originally blocked the drain pipe 6 to prevent the exhaust gas from escaping from the drain pipe 6. At this time, as the lightweight float 8 rises, the sealing plug 9 leaves the opening of the drain pipe 6, and the water is discharged through the drain pipe 6. When the water level in the water collection tank 5 drops, the lightweight float... Rod 8 and sealing plug 9 fall back under their own gravity, re-blocking drain pipe 6. At the same time, pressure sensor 10 on the right rear side of Venturi 4 monitors the pressure of exhaust gas in exhaust pipe 1 in real time. If the pressure is too high or too low, pressure sensor 10 transmits a signal to frequency converter 11 on the left rear side of Venturi 4. Frequency converter 11 adjusts the power of exhaust fan 12, thereby adjusting the air flow speed in exhaust pipe 1 to ensure stable operation of the exhaust gas emission system. Under the action of exhaust fan 12, the pre-treated exhaust gas flows from exhaust pipe 1 to exhaust pipe 2. The exhaust gas entering exhaust pipe 2 encounters cyclone dehumidifier 14. Cyclone dehumidifier 14 absorbs the residual water vapor in the exhaust gas, preventing the water vapor still contained in the exhaust gas after the preliminary filtration of Venturi 4 from affecting subsequent equipment or the environment. Meanwhile, infrared monitor 13 on the right top of Venturi 4 continuously monitors the condition inside exhaust pipe 1.
[0034] Reference Figure 2 , Figure 3 and Figure 5 The pipe cleaning mechanism 3 includes a servo motor 301, which provides power to the pipe cleaning mechanism 3. The bottom of the servo motor 301 is fixedly connected to the inner bottom wall of the mounting groove 20. The output end of the servo motor 301 is fixedly connected to a gear 302, which is used to transmit the power of the servo motor 301. A sliding groove 303 is provided on the rear side of the inner wall of the exhaust pipe 1. The sliding groove 303 provides movement space for the lead screw 304 and the slider 306. The inner wall of the sliding groove 303 is rotatably connected to the lead screw 304, which enables the slider 306 to move left and right. Multiple keyways 305 are provided on the outer right end of the lead screw 304. The multiple keyways 305 are used to cooperate with the gear 302 to transmit the power of the servo motor 301. The outer side of the lead screw 304 is threadedly connected to the slider 306, which can drive the scraper 307 to move. The front side of the slider 306 is fixedly connected to the scraper 307, which can clean the dirt in the exhaust pipe 1.
[0035] Specifically, after the exhaust gas emission system has been running for a period of time, the operator observes the condition inside the exhaust pipe 1 through the observation window 22. Based on the observed accumulation of dirt inside the exhaust pipe 1, the operator decides to activate the pipe cleaning mechanism 3. The bottom of the servo motor 301 is fixed to the inner bottom wall of the mounting groove 20, which provides a safe and stable installation position for the servo motor 301, ensuring that the servo motor 301 does not shift or shake during operation. The servo motor 301 is started by the controller and begins to run. The output end of the servo motor 301 drives the gear 302 to rotate synchronously. Multiple keyways 305 on the outer right end of the lead screw 304 cooperate with the gear 302. When the gear 302 rotates, due to the meshing of the keyways 305 and the gear 302, the lead screw 304 begins to rotate under the constraint of the sliding groove 303. The screw 304 is provided with a space to rotate, while ensuring the accuracy of the rotation direction of the screw 304 and avoiding deviation. When the screw 304 rotates, the slider 306, which is threaded to the outside of the screw 304, moves left and right along the screw 304 in the slide groove 303. The moving speed and direction of the slider 306 are controlled by the speed and rotation direction of the servo motor 301. The operator can flexibly adjust the operating parameters of the servo motor 301 to control the movement of the slider 306. The scraper 307, which is fixedly connected to the front of the slider 306, moves with the slider 306. The scraper 307 can effectively scrape off the dirt accumulated on the inner wall of the exhaust pipe 1 without damaging the inner wall of the pipe. During the movement, the scraper 307 is close to the inner wall of the exhaust pipe 1, scraping the dirt off the pipe wall and restoring the inner wall of the pipe to cleanliness, ensuring the smoothness of exhaust gas emission and improving the overall performance of the exhaust gas emission system.
[0036] Reference Figure 1 , Figure 2 and Figure 3Both guide plates 7 are fixedly connected to the top of a water level sensor 18, which monitors the water level in the water collection tank 5. A buzzer 19 is fixedly connected to the top of the exhaust pipe 1. When there is too much water in the water collection tank 5, the buzzer 19 alerts staff to handle the situation manually. An observation hole 21 is provided in the middle of the outer side of the inspection cover 15. An observation window 22 is fixedly connected to the inner wall of the observation hole 21, allowing observation of the inside of the exhaust pipe 1. Two electric door openers 23 are fixedly connected to the front side of the outer wall of the exhaust pipe 1, facilitating inspection. The opening and closing of the cover 15 is facilitated by a safety lock 24 fixedly connected to the top front side of the cover 15. The safety lock 24 can prevent the cover 15 from being opened suddenly, causing exhaust gas to escape. Two rotating shafts 25 are fixedly connected to the bottom front side of the cover 15. Two pins 26 are fixedly connected to the front side of the outer wall of the exhaust pipe 1. The two rotating shafts 25 and the two pins 26 facilitate the opening and closing of the cover 15. A sealing gasket 17 is fixedly connected to the outer side of the cover 15. The size of the sealing gasket 17 is the same as the outer side size of the cover 15. The sealing gasket 17 can make the gap between the cover 15 and the exhaust pipe 1 disappear, preventing exhaust gas from escaping.
[0037] Specifically, before the equipment is put into use, the electrical components inside the equipment are connected to a specific controller to facilitate the control and operation of each component later. The water level sensor 18 is fixedly installed on the top of the two guide plates 7 to monitor the water level in the water tank 5 in real time. When the water level in the water tank 5 rises and exceeds the threshold of the water level sensor 18, it means that there is too much water in the water tank 5, which will affect the normal operation of the device. At this time, the buzzer 19 sounds an alarm to remind the staff that there is too much water in the water tank 5 and manual handling is required. When the operator wants to observe the situation inside the exhaust pipe 1, he walks to the inspection cover 15. The inner wall of the observation hole 21 is fixedly connected to the observation window 22. The operator looks into the exhaust pipe 1 through the observation hole 21 and the observation window 22 to directly observe the internal condition of the exhaust pipe 1, such as the flow of exhaust gas, whether there are foreign objects blocking it or the degree of dirt accumulation on the inner wall of the pipe, so as to promptly... When problems are discovered and corresponding measures are taken, if it is necessary to open the inspection cover 15 for maintenance or cleaning, the safety lock 24 is first released. The safety lock 24 is used to prevent the inspection cover 15 from being opened suddenly due to accidents or external forces during equipment operation, which would cause exhaust gas to escape. The inspection cover 15 is opened by two electric door openers 23. The electric door openers 23 make the inspection cover 15 rotate around two rotating shafts 25 and two pins 26, thereby realizing the opening and closing of the inspection cover 15. Operators can also operate remotely through wireless connection. After the maintenance work is completed, the inspection cover 15 is driven to rotate by the electric door openers 23 so that the inspection cover 15 is in contact with the exhaust pipe 1. At this time, the sealing gasket 17 installed on the outside of the inspection cover 15 plays a sealing role to prevent exhaust gas from escaping from the gaps and ensure the sealing and safety of the exhaust gas emission system. Finally, the safety lock 24 is restarted to ensure that the inspection cover 15 is in the locked state.
[0038] Working Principle: After the exhaust fan 12 is started by the controller, it operates and quickly extracts the air from the exhaust pipe 1, creating a negative pressure environment inside the exhaust pipe 1. As the gas flows from the high-pressure area to the low-pressure area, the exhaust gas in the workshop, which is under relatively high pressure, is drawn into the exhaust pipe 1. After entering the exhaust pipe 1, the exhaust gas comes into contact with the inclined venturi hood 4, which expands the effective collection area of the hood opening, improves the exhaust gas collection efficiency, and makes it difficult for pollutants to escape. Because the venturi hood 4 is placed at an incline, the moisture and denser impurities carried in the exhaust gas slide down the surface of the venturi hood 4 under the action of gravity, realizing the separation of solid and liquid components from the gas in the exhaust gas. The slid-down water collects in the water collection tank 5. When the water level in the water collection tank 5 is low, the sealing plug 9 tightly blocks the drain pipe 6 opening under its own weight and the action of the lightweight float 8, preventing exhaust gas from leaking from the drain pipe 6. As the water level rises to a certain height, the buoyancy of the water on the lightweight float 8 is greater than that of the lightweight float 8 and the sealing plug 9. The combined weight of the plug 9 causes the lightweight float 8 to move the sealing plug 9 upwards, opening the drain pipe 6. Water is then discharged through the drain pipe 6 under gravity. As the water level drops, the lightweight float 8 and sealing plug 9 fall back under gravity, blocking the drain pipe 6 again. The pressure sensor 10 on the right rear side of the venturi shroud 4 monitors the pressure generated by the flow of exhaust gas in exhaust pipe 1 in real time. When the pressure sensor 10 detects a pressure deviation from the normal range, it transmits a signal to the frequency converter 11. Based on the received signal, the frequency converter 11 adjusts the power of the exhaust fan 12 by changing the frequency and voltage of the output current, thereby adjusting the airflow speed in exhaust pipe 1 to ensure stable operation of the exhaust gas emission system. The pre-treated exhaust gas flows from exhaust pipe 1 to exhaust pipe 2 under the action of the exhaust fan 12. In exhaust pipe 2, the exhaust gas encounters the cyclone dehumidifier 14, which absorbs residual moisture in the exhaust gas, preventing moisture from causing corrosion and blockage to subsequent equipment.
[0039] Furthermore, as the exhaust gas emission device continues to operate, dirt gradually accumulates on the inner wall of exhaust pipe 1, affecting the smoothness of exhaust gas emission. The operator observes the condition inside exhaust pipe 1 through observation window 22. When the dirt accumulation reaches a certain level and cleaning is deemed necessary, the pipe cleaning mechanism 3 is activated. The operator starts the servo motor 301 through the controller, and the servo motor 301 begins to run. The output end of the servo motor 301 is fixedly connected to the gear 302. When the servo motor 301 runs, the output end drives the gear 302 to rotate synchronously. The multiple keyways 305 on the outer right end of the lead screw 304 mesh with the gear 302. When the gear 302 rotates, the power is transmitted to the lead screw 304 through the keyways 305, causing the lead screw 304 to start rotating. The sliding groove 303 can constrain and guide the lead screw 304, providing space for the lead screw 304 to rotate, while ensuring that the lead screw 304 can only rotate along the same path. Rotating in a specific direction avoids deviation and ensures the accuracy and stability of power transmission. When the lead screw 304 rotates, it drives the slider 306 to move left and right within the groove 303. Since the moving speed and direction of the slider 306 are determined by the speed and rotation direction of the servo motor 301, the operator can adjust the operating parameters of the servo motor 301 through the controller, thereby controlling the movement of the slider 306 and achieving targeted cleaning operations. The front side of the slider 306 is fixedly connected to the scraper 307. When the slider 306 moves, the scraper 307 also moves synchronously. The scraper 307 uses its own hardness and shape to scrape off the dirt accumulated on the inner wall of the pipe. At the same time, in order to avoid damaging the inner wall of the pipe, the scraper 307 is made of a material with certain flexibility and wear resistance. The scraper 307 restores the inner wall of the exhaust pipe 1 to cleanliness, ensuring the smoothness of exhaust gas emission and improving the overall performance of exhaust gas emission.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A plastic production plant exhaust gas discharge structure comprising an exhaust pipe one (1) and an exhaust pipe two (2), characterized in that: A venturi cover (4) is fixedly connected to the left side of the inner wall of the exhaust pipe (1). A water collection trough (5) is provided on the left side of the inner bottom wall of the exhaust pipe (1). A drain pipe (6) is connected to the inner bottom wall of the water collection trough (5). Two guide plates (7) are fixedly connected to the inner bottom wall of the water collection trough (5). The same lightweight float (8) is slidably connected to the inner wall of both guide plates (7). A sealing plug (9) is fixedly connected to the bottom of the lightweight float (8). A pressure sensor (10) is fixedly connected to the rear right end of the venturi cover (4). A pressure sensor (10) is fixedly connected to the rear left end of the venturi cover (4). A frequency converter (11) is fixedly connected to the exhaust pipe (2). A fan (12) is fixedly connected to the left side of the inner bottom wall of the exhaust pipe (2). A cyclone dehumidifier (14) is fixedly connected to the right side of the inner bottom wall of the exhaust pipe (2). An infrared monitor (13) is fixedly connected to the top right end of the venturi cover (4). A maintenance cover (15) is rotatably connected to the front side of the outer wall of the exhaust pipe (1). A mounting groove (20) is opened on the right side of the inner wall of the exhaust pipe (1). A pipe cleaning mechanism (3) is provided on the inner wall of the exhaust pipe (1). The pipe cleaning mechanism (3) is used to clean the dirt in the exhaust pipe.
2. A plastic production plant exhaust gas discharge structure according to claim 1, characterized in that: The pipe cleaning mechanism (3) includes a servo motor (301), the bottom of which is fixedly connected to the inner bottom wall of the mounting groove (20). The output end of the servo motor (301) is fixedly connected to a gear (302). A sliding groove (303) is provided on the rear side of the inner wall of the exhaust pipe (1). A lead screw (304) is rotatably connected to the inner wall of the sliding groove (303). Multiple keyways (305) are provided on the right side of the outer side of the lead screw (304). A slider (306) is threadedly connected to the outer side of the lead screw (304). A scraper (307) is fixedly connected to the front side of the slider (306).
3. A plastic production plant exhaust gas discharge structure according to claim 1, characterized in that: A water level sensor (18) is fixedly connected to the top of each of the two guide plates (7), and a buzzer (19) is fixedly connected to the top of the exhaust pipe (1).
4. A plastic production plant exhaust gas discharge structure according to claim 1, characterized in that: An observation hole (21) is provided in the middle of the outer side of the inspection cover (15), and an observation window (22) is fixedly connected to the inner wall of the observation hole (21).
5. The exhaust gas emission structure for a plastic production workshop according to claim 1, characterized in that: Two electric door openers (23) are fixedly connected to the front side of the outer wall of the exhaust pipe (1), and a safety lock (24) is fixedly connected to the top of the front side of the inspection cover (15).
6. The exhaust gas emission structure for a plastic production workshop according to claim 5, characterized in that: The inspection cover (15) has two rotating shafts (25) fixedly connected to the bottom front side, and the exhaust pipe (1) has two pins (26) fixedly connected to the front outer wall.
7. The exhaust gas emission structure for a plastic production workshop according to claim 1, characterized in that: The right end of the venturi cover (4) is fixedly connected to a hydrophobic coating plate (16), which is made of double-sided material.
8. The exhaust gas emission structure for a plastic production workshop according to claim 5, characterized in that: A sealing gasket (17) is fixedly connected to the outside of the inspection cover (15), and the size of the sealing gasket (17) is the same as the outer size of the inspection cover (15).