High concentration VOCs waste gas treatment, compression condensation membrane separation technology

High concentration VOCs waste gas treatment, compression condensation membrane separation technology

High concentration organicwaste gas treatmentIt has always been a long-standing problem in industries such as chemical and pharmaceutical. The concentration is high, traditionalactivated charcoalSaturate after a while of adsorption, and replace the charcoal until the hands are soft; useRTODirectly burning not only wastes valuable solvents, but also incurs annual gas bills of several hundred thousand yuan, which is enough to make people feel heartbroken. Is it really that difficult to take care of high concentration exhaust gas? Actually, looking at it from a different perspective, it's actually a treasure.

The compression condensation membrane separation technology is designed for this type of working condition. This process consists of three steps: the exhaust gas first enters the compressor for pressurization, increasing the partial pressure of organic matter to make subsequent condensation more efficient; Then it enters the multi-stage condensation unit and gradually cools down to liquefy most of the organic matter from gas to liquid, which is directly recovered into solvent; Finally, a small portion of the exhaust gas remaining after condensation enters the membrane separation unit. By utilizing the difference in permeation rate between organic molecules and air molecules in the membrane material, the residual organic matter is "cleaned" and sent back to the front end for recycling treatment, and the air is directly discharged to meet the standard. The entire system is closed-loop and will not allow organic matter to slip away in vain.

This technology is most suitable for medium to high concentration exhaust gases with inlet concentrations ranging from 2 grams to 20 grams per cubic meter, and air flow rates typically ranging from 500 to 20000 cubic meters per hour. The higher the concentration, the better the economic efficiency of recycling, and the investment payback period is generally one to two years. It has good recovery effects on common solvents such as acetone, ethyl acetate, dichloromethane, toluene, and n-hexane. The equipment only uses electricity, does not burn gas, and does not have activated carbon consumables. Daily maintenance mainly involves cleaning the heat exchanger and checking the pressure difference of the membrane components. In practical cases, the overall recovery rate of the combined process can reach over 95%, emissions are stable and meet standards, and comprehensive energy consumption is significantly reduced compared to traditional processes.

So, high concentration exhaust gas is not troublesome, choosing the right process is a stable source of income.