Plastic ProductionExhaust Gas Treatment Solutions

(physical works cases)

Industry Introduction

Plastic is widely used as an indispensable component in home appliances, automobiles, mobile phones, PCs, medical devices, and lighting appliances. With China's economy to achieve sustained and stable growth, home appliances, automobiles, mobile phones, PC, medical devices and other industries to benefit from a favourable external environment has also achieved rapid development, the development of downstream industries to further stimulate the demand for plastic, China's automobiles, home appliances, consumer electronics, medical devices and other downstream industries will continue to maintain a faster development of these industries on the demand for plastic parts will continue to expand, and at the same time the demand will also Present high-end, precision trend.

Pollution hazards

Plastic waste gas in the exhaust pollutants which most of the production line raw materials polymerisation and heat treatment processes, which may contain a large number of styrene, benzene, xylene, butanone, aldehydes, sulphides, nitrogen oxides, and other organic waste gas and fumes, and accompanied by a certain temperature diffusion throughout the workshop interior and plant boundaries around the region, is a more serious pollution of the exhaust gas. General industry sulfide fumes are more harmful, the exhaust gas composition contains malodorous substances, and with the wind direction of long-distance drift, stay in the air for a long time. Causes a variety of adverse effects

Overview of the treatment programme

For the plastic exhaust VOCs treatment technology, now in line with environmental emission requirements, and play a role in reducing costs and efficiency of the treatment technology, is the use of combustion technology is more economical and energy-saving. It is recommended to use: wet jet washing (multi-pipe) + dry filter + wind reduction and thickening + catalytic combustion combination of governance, governance can meet the emission requirements of the standard!

Process flow

 
Wet jet washing (multi-tube) + dry filtration + activated carbon adsorption and concentration + catalytic combustion process (integrated system) process treatment. Organic waste gas is collected through the pipeline, and enters the pretreatment wet jet tower to remove paint dew, acidity and particulate matter purification. After purification, the gas is introduced into the dry filter to remove particles and zeolite adsorption of hazardous substances, and the organic waste gas is then sent to the activated carbon adsorption bed device, and the VOCs components in the waste gas are absorbed by the zeolite and discharged into the atmosphere after reaching the standard. When the zeolite adsorption bed is saturated by electric heating at high temperature (80-100 ℃ C) desorption of VOCs substances, desorption of high concentrations of organic waste gas directly into the catalytic combustion co, through the accelerated oxidation of high concentrations of waste gas by precious metals, in ( 250-350 ℃) high temperature purification and oxidation of harmless carbon dioxide (CO2) and water vapour (H20) and standards discharged into the atmosphere.

Other treatment technology

Low concentration and small air volume of plastic waste gas can be used: spray tower, uv photolysis purifier, activated carbon adsorption and other single or multiple combinations of processes for treatment;

High concentration of small air volume plastic waste gas can be used: pretreatment + zeolite molecular sieve + catalytic combustion, pretreatment + zeolite molecular sieve + RTO thermal storage incinerator, a single catalytic combustion device or a single RTO thermal storage incinerator and so on;