A waste gas collection and pretreatment system for the plastic modification industry

Abstract

The utility model discloses a waste gas collection and pretreatment system for the plastic modification industry, including a waste gas collection part and a pretreatment part, the waste gas collection part includes a gas collection hood and a collection branch pipe, the pretreatment part includes a pretreatment chamber and a grid plate, a nozzle and a demister plate arranged in the pretreatment chamber, the lower part of the pretreatment chamber is provided with an air inlet and a spray liquid discharge port, the upper part of the pretreatment chamber is provided with an exhaust port and a spray liquid inlet, the gas collection hood is connected to the air inlet of the pretreatment chamber through the collection branch pipe, the nozzle is arranged in the pretreatment chamber through the spray liquid inlet pipe, the grid plate is arranged between the nozzle and the air inlet and the spray liquid discharge port, and the demister plate is arranged between the nozzle and the exhaust port. The utility model is applied to waste gas collection and pretreatment in the plastic modification industry, has a simple structure, convenient operation and maintenance, and low equipment investment, and can effectively pretreat particulate matter and polymer oil smoke.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas collection and pretreatment system for the plastic modification industry. Background Art

[0002] Modified plastics possess excellent properties such as insulation, heat resistance, flame retardancy, and corrosion resistance, and are widely used in various fields of production, such as automotive, packaging, building materials, electronics, and medical applications. The production process for modified plastics generally involves mixing synthetic resin, colorant, and modifiers before extruding them through a twin-screw extruder. The heating and extrusion processes in twin-screw extruders generate significant amounts of organic waste gas. This waste gas not only contains a certain amount of particulate matter, high-molecular-weight oil mist, and non-methane hydrocarbons, but also has a high temperature, making it a significant challenge in waste gas treatment in recent years.

[0003] The main difficulties in treating organic waste gas in the modified plastics industry are: the combination of particulate matter and polymer fume will cause scaling on the gas collection hood, air duct and treatment equipment, and then gradually clog the above systems, resulting in increased equipment maintenance frequency and maintenance costs, as well as poor operation and short life of the treatment system. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a waste gas collection and pretreatment system for the plastic modification industry with a simple structure, convenient operation and maintenance, and low equipment investment, which can effectively pretreat particulate matter and polymer smoke.

[0005] The technical solution of the utility model is as follows:

[0006] A waste gas collection and pretreatment system for the plastic modification industry includes a waste gas collection part and a pretreatment part, the waste gas collection part includes an air collection hood and a collection branch pipe, the pretreatment part includes a pretreatment chamber and a grid plate, a nozzle and a defogger plate arranged in the pretreatment chamber, the lower part of the pretreatment chamber is provided with an air inlet and a spray liquid discharge port, the upper part of the pretreatment chamber is provided with an exhaust port and a spray liquid inlet, the air collection hood is connected to the air inlet of the pretreatment chamber through the collection branch pipe, the nozzle is connected to the spray liquid inlet of the pretreatment chamber through the spray liquid inlet pipe, the grid plate is arranged between the nozzle and the air inlet and the spray liquid discharge port, and the defogger plate is arranged between the nozzle and the exhaust port.

[0007] Furthermore, an oil fume collecting groove is provided on the inner side wall of the gas collecting hood, and oil absorbing cotton is placed in the oil fume collecting groove.

[0008] Furthermore, the collecting branch pipe is provided with a rotatable structure.

[0009] Furthermore, a first wind pressure sensor is provided in the collecting branch pipe.

[0010] Furthermore, a liquid baffle inclined downward is provided on the inner side wall of the air inlet of the pretreatment chamber.

[0011] Furthermore, the grid plate is designed to be pluggable, a handle is provided at one end of the grid plate, and a plug-in port for the grid plate to be pulled out or inserted is provided at one side of the pretreatment chamber.

[0012] Furthermore, a rubber sealing ring is provided around the grid plate.

[0013] Furthermore, a second wind pressure sensor is provided in the exhaust port of the pretreatment chamber.

[0014] Furthermore, an observation panel is provided on the side of the pretreatment chamber.

[0015] Compared with the existing technology, the beneficial effect of the present invention is that the system is applied to waste gas collection and pretreatment in the plastic modification industry. During the production of modified plastics, the organic waste gas generated by the twin-screw extruder first enters the gas collection hood. The temperature of the waste gas drops rapidly, and some particulate matter and polymer fume gradually condense and adhere to the gas collection hood. Then, it flows along the inner wall into the fume collection tank and adheres to the oil-absorbing cotton. The waste gas then enters the pretreatment part through the collection branch pipe. The grille plate first intercepts the particulate matter in the waste gas, and then the waste gas is eluted with spray liquid to complete the pretreatment. Finally, the waste gas passes through the demister plate and is discharged from the exhaust port to the subsequent air duct and treatment system for deep treatment. The system has a simple structure, easy operation and maintenance, and low equipment investment, and can effectively pretreat particulate matter and polymer fume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of a waste gas collection and pretreatment system for the plastic modification industry provided by the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 intended to limit the present invention.

[0019] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0020] Example

[0021] See also Figure 1 The present embodiment provides a waste gas collection and pretreatment system for the plastic modification industry, which is used for waste gas collection and pretreatment in the plastic modification industry. The system comprises a waste gas collection part 1 and a pretreatment part 2. The waste gas collection part 1 comprises a gas collecting hood 11 and a collecting branch pipe 12. The pretreatment part 2 comprises a pretreatment chamber 21 and a grid plate 22, a nozzle 23 and a demisting plate 24 arranged in the pretreatment chamber 21. The lower part of the pretreatment chamber 21 is provided with an air inlet and a spray outlet 211. The pretreatment chamber An exhaust port 212 and a spray liquid inlet are provided on the upper part of 21. The gas collecting hood 11 is connected to the air inlet of the pretreatment chamber 21 through a collecting branch pipe 12. An oil fume collection tank 13 is provided on the inner wall of the gas collecting hood 11. Oil absorbing cotton 14 is placed in the oil fume collection tank 13. The nozzle 23 is connected to the spray liquid inlet of the pretreatment chamber 21 through a spray liquid inlet pipe 25. The grid plate 22 is arranged between the nozzle 23 and the air inlet and the spray liquid discharge port 211. The defogger plate 24 is arranged between the nozzle 23 and the exhaust port 212.

[0022] Working principle: During the production of modified plastics, the organic waste gas generated by the twin-screw extruder first enters the gas collecting hood 11, and the temperature of the waste gas drops rapidly. Some particulate matter and high molecular oil smoke gradually condense and adhere to the gas collecting hood 11, and then flow along the inner wall into the oil smoke collection tank 13, adhere to the oil-absorbing cotton 14, and then the waste gas enters the pretreatment part 2 through the collection branch pipe 12. The grille plate 22 first intercepts the particulate matter in the waste gas, and then the waste gas is rinsed with spray liquid to complete the pretreatment. Finally, the waste gas passes through the demister plate 24 and is discharged from the exhaust port 212 to the subsequent air duct and treatment system for deep treatment.

[0023] The collecting branch pipe 12 is provided with a rotatable structure 121 , which can adjust the direction of the gas collecting hood 11 , thereby facilitating the maintenance of the production equipment and the gas collecting hood 11 .

[0024] A first wind pressure sensor 15 is provided in the collecting branch pipe 12 , and the pollution blockage condition in the collecting branch pipe 12 can be determined by the wind pressure difference.

[0025] The inner side wall of the air inlet of the pretreatment chamber 21 is provided with a downwardly inclined liquid baffle 25 to prevent the spray liquid from entering the collecting branch pipe 12 .

[0026] Among them, the grid plate 22 is designed to be pluggable, and a rubber sealing ring 26 is arranged around the grid plate 22. A handle is provided at one end of the grid plate 22, and a plug-in port for the grid plate 22 to be pulled out or inserted is provided on one side of the pretreatment chamber 21. This structural design allows the grid plate 22 to be directly pulled out and cleaned, and the structure and maintenance are simple.

[0027] The exhaust port 212 of the pre-processing chamber 21 is provided with a second wind pressure sensor 27 , which can determine the pollution blockage condition of the exhaust port 212 of the pre-processing chamber 21 through the wind pressure difference.

[0028] Among them, an observation panel 213 is set on the side of the pretreatment chamber 21, which is fixed by bolts for easy disassembly and maintenance. The observation panel 213 is the side of the entire pretreatment chamber 21, which is made of a whole piece of transparent tempered glass, and the pretreatment situation can be directly observed.

[0029] The above are only 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waste gas collection and pretreatment system for the plastic modification industry, characterized by: It includes an exhaust gas collection part and a pretreatment part, the exhaust gas collection part includes an air collection hood and a collection branch pipe, the pretreatment part includes a pretreatment chamber and a grille plate, a nozzle and a demister plate arranged in the pretreatment chamber, the lower part of the pretreatment chamber is provided with an air inlet and a spray liquid discharge port, the upper part of the pretreatment chamber is provided with an exhaust port and a spray liquid inlet, the air collection hood is connected to the air inlet of the pretreatment chamber through the collection branch pipe, the nozzle is connected to the spray liquid inlet of the pretreatment chamber through the spray liquid inlet pipe, the grille plate is arranged between the nozzle and the air inlet and the spray liquid discharge port, and the demister plate is arranged between the nozzle and the exhaust port.

2. A waste gas collection and pretreatment system for the plastic modification industry according to claim 1, characterized in that: An oil fume collecting groove is arranged on the inner side wall of the gas collecting hood, and oil absorbing cotton is placed in the oil fume collecting groove.

3. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized in that: The collecting branch pipe is provided with a rotatable structure.

4. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized by: A first wind pressure sensor is arranged in the collecting branch pipe.

5. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized by: The inner side wall of the air inlet of the pretreatment chamber is provided with a liquid baffle inclined downward.

6. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized by: The grid plate is designed to be pluggable, a handle is provided at one end of the grid plate, and a plug-in port for the grid plate to be pulled out or inserted is provided at one side of the pretreatment chamber.

7. A waste gas collection and pretreatment system for the plastic modification industry according to claim 6, characterized in that: A rubber sealing ring is arranged around the grid plate.

8. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized by: A second wind pressure sensor is arranged in the exhaust port of the pretreatment chamber.

9. The waste gas collection and pretreatment system for the plastic modification industry according to claim 1 is characterized by: An observation panel is arranged on the side of the pretreatment chamber.

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