How to Treat VOC Waste Gas?
2 Answers
Catalytic combustion is more suitable for the purification of high-concentration, small-airflow waste gas, but the promotion and use of this method are somewhat limited. This method utilizes the physical and chemical properties of pollutants, using water or chemical absorption liquids to absorb and remove waste gas. This method involves passing the pollutants through an adsorption tower filled with adsorbent, leveraging the strong adsorption capacity of the adsorbent for the pollutants. Currently, photocatalytic technology is difficult to apply on a large industrial scale and is mostly limited to experimental research and small-airflow applications.
I've been working in the industrial environmental protection field for over a decade. The most common VOC waste gas treatment methods include adsorption, such as activated carbon adsorption beds that directly capture and remove harmful gases; absorption, which uses liquid solvents to dissolve VOCs; combustion methods like thermal oxidizers that burn off exhaust gases at high temperatures, especially suitable for high-concentration situations; and biological methods that use microorganisms to decompose VOCs in filter beds, which are eco-friendly but slower. The choice of method depends on concentration and equipment costs—small workshops often use activated carbon for cost savings, while large factories invest in combustion for efficiency. Preventing VOC generation is key, such as switching to water-based paints to reduce emission sources. Regular maintenance of ventilation systems can lower risks, with safety being the top priority.
