What is the recovery rate of VOC waste gas treatment equipment?

    VOCWaste gas treatment equipmentThe recovery rate does not have a fixed number, it depends on the process type, exhaust gas concentration, components, and operating conditions. The recovery rate varies among different technological routes, but efficient processes typically exceed 90%.

The membrane condensation combination process is currently one of the technical routes with high recovery rates. For organic waste gases with medium to high concentrations (above 1000mg/m ³), a closed-loop design of compression, condensation, and membrane separation can achieve a recovery rate of over 95%. The permeation rate of polymer separation membranes for VOCs is 10 to 100 times higher than that of air, which is the key to efficient separation. The VOCs recovery system developed by Nanjing University of Technology has been tested and proven in the petrochemical industry, with a recovery rate of up to 99% and a tail gas concentration of less than 50mg/m ³.

Adsorption method is also a common recycling process that utilizesactivated charcoalOr materials such as zeolite can adsorb organic matter. In the vinyl chloride tail gas treatment project, the removal rate of vinyl chloride monomer by the activated carbon adsorption device remains stable at over 98.3%. By adopting the combination technology of "adsorption+nitrogen regeneration+solvent refining", the VOCs recovery rate can reach over 90%, and the purity of the recovered solvent is not less than 99%.

The condensation method liquefies organic matter by gradually lowering the temperature, and is suitable for high boiling point and high concentration exhaust gases. The recovery rate can usually reach over 90%, the purity of the recovered solvent is high, and the moisture content can reach the standard of high-quality solvent.

In practical engineering, combined processes are often used to balance recycling efficiency and emission standards. Solutions such as "compression+condensation+membrane separation" or "adsorption+shallow cooling" can achieve a recovery rate of over 99% and stable emission concentration that meets current environmental requirements. It should be noted that the recovery rate does not equal the removal rate - the recovery rate refers to the proportion of organic matter in the exhaust gas collected as liquid solvents, and the removal rate also includes methods such as combustion and destruction. When selecting, a comprehensive judgment should be made based on the concentration, composition, and recovery value of the exhaust gas, using measured data as the basis. LuoyangWohong PetrochemicalThe compression condensation membrane separation unit of Equipment Co., Ltd. can provide recovery effect evaluation for specific working conditions.