Waste gas purification equipment for plastic product processing

Abstract

The utility model discloses waste gas purification equipment for plastic product processing, which comprises a front cooling water tank, a water neutralization tank, an adsorption tank and a rear cooling water tank, a first heat conduction coil pipe is connected in the front cooling water tank, and the rear side of the front cooling water tank is connected with a first semiconductor refrigeration plate; the front side of the front cooling water tank is connected with a gas inlet pipeline connected with the first heat conduction coil pipe, a top water neutralization cavity is formed in the water neutralization tank, a drying agent adsorption layer, an organic waste gas molecular sieve plate and an activated carbon adsorption layer are sequentially connected in the attached tank from front to back, and a second heat conduction coil pipe is connected in the rear cooling water tank. Compared with the prior art, the device has the advantages that the front cooling water tank, the water neutralization tank, the adsorption tank and the rear cooling water tank are sequentially arranged from front to back, so that high-temperature plastic product waste gas with complex components can be subjected to modes of front cooling, neutralization, multi-section adsorption and rear cooling, and the gas can be integrally purified and discharged.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology for plastic products, specifically to a waste gas purification device for plastic product processing. Background Technology

[0002] Plastic processing waste gas refers to the waste gas generated during the plastic processing process. It mainly comes from the heating, melting and extrusion of plastic raw materials. These waste gases contain volatile organic compounds and other harmful substances, which pose a threat to the environment and human health.

[0003] Therefore, the waste gas generated from plastic product processing often needs to be treated. However, plastic waste gas contains a large number of complex harmful substances, so a single filtration treatment cannot completely purify the waste gas. Multi-stage waste gas treatment often has high equipment costs, and there is a lack of integrated equipment for purifying plastic product waste gas. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an integrated waste gas purification device for plastic product processing, which addresses the shortcomings mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a waste gas purification device for plastic product processing, including a front cooling water tank, a water neutralization tank, an adsorption tank and a rear cooling water tank, wherein a first heat conduction coil is connected inside the front cooling water tank, a first semiconductor cooling plate is connected to the rear side of the front cooling water tank, an air inlet pipe connected to the first heat conduction coil is connected to the front side of the front cooling water tank, and a top water neutralization chamber is provided inside the water neutralization tank;

[0006] The first heat-conducting coil extends to the bottom of the water neutralization chamber and is connected to a gas distribution plate. The top of the gas distribution plate is connected to a plurality of gas guide pipes extending to the bottom of the water neutralization chamber. The top of the water neutralization chamber is provided with a gas guide port communicating with the adsorption box.

[0007] The adsorption box is provided with a desiccant adsorption layer, an organic waste gas molecular sieve plate and an activated carbon adsorption layer connected in sequence from front to back.

[0008] The rear cooling water tank is equipped with a second heat-conducting coil, the adsorption box is equipped with a gas delivery pipe connected to the second heat-conducting coil, the rear cooling water tank is equipped with a second semiconductor refrigeration plate, and the rear end of the second heat-conducting coil is equipped with an exhaust pipe extending to the rear.

[0009] Furthermore, each of the first heat-conducting coils is connected to a drain pipe at the bottom bend, and multiple drain pipes extend to the outside and are connected to a water distribution plate. The bottom of the water distribution plate is connected to a drain valve pipe to facilitate the discharge of liquid condensed inside the first heat-conducting coil.

[0010] Furthermore, an electrically controlled valve is connected to the drain pipe to facilitate the timed discharge of condensate.

[0011] Furthermore, a one-way valve is connected to the air guide pipe to prevent liquid from entering the air distribution plate.

[0012] Furthermore, a stirring motor is connected to the top of the water neutralization tank, and a stirring and dispersing device is connected to the bottom power end of the stirring motor and above the gas guide pipe to facilitate the dispersing of gas and ensure that the gas and neutralization liquid are in full contact.

[0013] Furthermore, the adsorption box is equipped with a support mesh frame that supports the desiccant adsorption layer and the activated carbon adsorption layer, which facilitates the support of the desiccant adsorption layer and the activated carbon adsorption layer.

[0014] Furthermore, temperature sensors are connected to the bottom of both the front and rear cooling water tanks, and a gas detection box is connected to the exhaust pipe to facilitate the sensing of temperature and gas quality.

[0015] The advantages of this utility model for purifying waste gas from plastic product processing compared to existing technologies are as follows: This utility model, through a front cooling water tank, a water neutralization tank, an adsorption tank, and a rear cooling water tank arranged sequentially from front to back, can perform front cooling, neutralization, multi-stage adsorption, and rear cooling on high-temperature plastic product waste gas with complex composition, and can purify and discharge the gas in an integrated manner. Attached Figure Description

[0016] Figure 1 This is a first structural schematic diagram of a waste gas purification device for plastic product processing according to this utility model.

[0017] Figure 2 This is a second structural schematic diagram of a waste gas purification device for plastic product processing according to this utility model.

[0018] Figure 3 This is a cross-sectional structural schematic diagram of a waste gas purification device for plastic product processing according to this utility model.

[0019] As shown in the figure: 1. Front cooling water tank; 2. Water neutralization tank; 3. Adsorption tank; 4. Rear cooling water tank; 5. First heat conduction coil; 6. Air inlet pipe; 7. First semiconductor refrigeration plate; 8. Drain pipe; 9. Electrically controlled valve; 10. Water distribution plate; 11. Drain valve pipe; 12. Water neutralization chamber; 13. Gas distribution plate; 14. Gas guide pipe; 15. One-way valve; 16. Stirring motor; 17. Stirring and dispersing device; 18. Gas inlet; 19. Desiccant adsorption layer; 20. Organic waste gas molecular sieve plate; 21. Activated carbon adsorption layer; 22. Support mesh frame; 23. Gas delivery pipe; 24. Second heat conduction coil; 25. Exhaust pipe; 26. Second semiconductor refrigeration plate; 27. Temperature sensor; 28. Gas detection box. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Combined with appendix Figure 1-3 A waste gas purification device for plastic product processing includes a front cooling water tank 1, a water neutralization tank 2, an adsorption tank 3, and a rear cooling water tank 4. The front cooling water tank 1 is equipped with a first heat-conducting coil 5, and a first semiconductor cooling plate 7 is connected to the rear side of the front cooling water tank 1. The heat dissipation surface of the first semiconductor cooling plate 7 needs to extend to the outside. If the operating environment is hot, a cooling fan or other heat dissipation device needs to be installed on the first semiconductor cooling plate 7. Alternatively, the first semiconductor cooling plate 7 can be replaced with a compressor for heat dissipation. An air inlet pipe 6 is connected to the front side of the front cooling water tank 1 to the first heat-conducting coil 5. The water neutralization tank 2 has a top water neutralization chamber 12, through which air is circulated via the first heat-conducting coil 5. The first heat-conducting coil 5 is immersed in the cold water of the front cooling water tank 1, thereby cooling the hot waste gas and condensing it, which can remove harmful substances from a large amount of waste gas.

[0022] Each of the first heat-conducting coils 5 is connected to a drain pipe 8 at the bottom bend. An electric control valve 9 is connected to the drain pipe 8. Each drain pipe 8 extends to the outside and is connected to a water distribution plate 10. A drain valve pipe 11 is connected to the bottom of the water distribution plate 10. Condensate can be discharged periodically by periodically activating the electric control valve 9 and the drain valve pipe 11.

[0023] The first heat-conducting coil 5 extends to the bottom of the water neutralization tank 2 and is connected to a gas distribution plate 13. The top of the gas distribution plate 13 is connected to multiple gas guide pipes 14 extending to the bottom of the water neutralization chamber 12. A one-way valve 15 is connected to the gas guide pipe 14. A stirring motor 16 is connected to the top of the water neutralization tank 2. The bottom power end of the stirring motor 16 extends above the gas guide pipe 14 and is connected to a stirring and dispersing device 17. The top of the water neutralization chamber 12 is provided with a gas inlet 18 communicating with the adsorption tank 3. After the gas is initially cooled, it is introduced into the water neutralization chamber 12 through the gas distribution plate 13 and the gas guide pipes 14, and neutralized by the neutralizing liquid. At the same time, the stirring and dispersing device 17 disperses the gas, which can increase the contact between the gas and the neutralizing liquid.

[0024] The adsorption box 3 is equipped with a desiccant adsorption layer 19, an organic waste gas molecular sieve plate 20, and an activated carbon adsorption layer 21 connected sequentially from front to back. The adsorption box 3 is also equipped with a support mesh frame 22 that supports the desiccant adsorption layer 19 and the activated carbon adsorption layer 21. The gas is neutralized at the front and undergoes drying and adsorption, organic waste gas adsorption in the gas, and activated carbon adsorption at the rear through the desiccant adsorption layer 19, the organic waste gas molecular sieve plate 20, and the activated carbon adsorption layer 21 in sequence, which can ultimately purify the waste gas.

[0025] The rear cooling water tank 4 is equipped with a second heat-conducting coil 24. The adsorption box 3 is connected to a gas delivery pipe 23 that communicates with the second heat-conducting coil 24. The rear side of the rear cooling water tank 4 is equipped with a second semiconductor cooling plate 26. The rear end of the second heat-conducting coil 24 is connected to an exhaust pipe 25 extending to the rear. Temperature sensors 27 are connected to the bottom of both the front cooling water tank 1 and the rear cooling water tank 4. After the exhaust gas is treated at the front end, there will still be some heat. Through the same setting as the front cooling water tank 1, terminal cooling and discharge are performed. The temperature of the rear cooling water tank 4 does not need to be set too low, and there is no need to set up a structure for discharging condensate, because the front desiccant has already performed adsorption. A gas detection box 28 is connected to the exhaust pipe 25. The gas detection box 28 is a multi-functional detector, equipped with sensors for temperature, pH value, organic matter detection, etc., to perform terminal detection.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A waste gas purification apparatus for plastic product processing, comprising a front temperature-reducing water tank (1), a water neutralization tank (2), an adsorption tank (3) and a rear temperature-reducing water tank (4), characterized in that: The front cooling water tank (1) is connected with a first heat-conducting coil pipe (5), the rear side of the front cooling water tank (1) is connected with a first semiconductor refrigeration plate (7), the front side of the front cooling water tank (1) is connected with an air inlet pipeline (6) of the first heat-conducting coil pipe (5), and the water neutralization tank (2) is internally provided with a top water neutralization cavity (12); The end of the first heat-conducting coil pipe (5) extends to the bottom of the water neutralization tank (2) and is connected with a gas distribution disc (13), the top of the gas distribution disc (13) is connected with a plurality of air guide pipes (14) extending to the bottom of the water neutralization cavity (12), and the top of the water neutralization cavity (12) is provided with an air guide opening (18) in communication with the adsorption tank (3); The adsorption tank (3) is sequentially connected from front to back with a desiccant adsorption layer (19), an organic waste gas molecular sieve plate (20) and an activated carbon adsorption layer (21); The rear cooling water tank (4) is connected with a second heat-conducting coil pipe (24), the rear side of the adsorption tank (3) is connected with a conveying gas pipe (23) in communication with the second heat-conducting coil pipe (24), the rear side of the rear cooling water tank (4) is connected with a second semiconductor refrigeration plate (26), and the rear end of the second heat-conducting coil pipe (24) is connected with an exhaust pipe (25) extending to the rear.

2. The exhaust gas purification apparatus for processing plastic products according to claim 1, characterized by: The bottom of the first heat-conducting coil pipe (5) is connected with a plurality of drainage pipes (8) at bending positions, the plurality of drainage pipes (8) extend to the outside and are connected with a water distribution plate (10), and the bottom of the water distribution plate (10) is connected with a liquid discharge valve pipe (11).

3. The exhaust gas purification apparatus for a plastic product processing according to claim 2, characterized by: The drainage pipe (8) is connected with an electric control valve (9).

4. The exhaust gas purification apparatus for processing plastic products according to claim 1, characterized by: The air guide pipe (14) is connected with a one-way valve (15).

5. The exhaust gas purification apparatus for a plastic product processing according to claim 1, characterized by: The top of the water neutralization tank (2) is connected with a stirring motor (16), and the bottom power end of the stirring motor (16) extends above the air guide pipe (14) and is connected with a stirring and dispersing device (17).

6. The exhaust gas purification apparatus for a plastic product processing according to claim 1, characterized by: The adsorption tank (3) is connected with a support net plate frame (22) supporting the desiccant adsorption layer (19) and the activated carbon adsorption layer (21).

7. The exhaust gas purification apparatus for a plastic product processing according to claim 1, characterized by: The bottom of the front cooling water tank (1) and the rear cooling water tank (4) is connected with a temperature sensor (27), and the exhaust pipe (25) is connected with a gas detection box (28).

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