Wo Hong separation membrane, with better recovery effect of condensation process

    gas separation membraneThe combination with the condensation process is a more mature supporting scheme in the recovery of VOCs resources. The two each perform their own functions and are complementary in terms of functionality. The core logic of the use is that membrane separation solves the problem of condensation "not clean", and condensation solves the problem of membrane separation "can only be concentrated but not liquefied.

The Wohong gas separation membrane undertakes the task of "concentration" in the combined process. After the mixed exhaust gas enters the membrane module, the difference in the permeation rate of organic molecules and air molecules in the membrane material is used -- VOCs molecules preferentially penetrate the membrane layer to form concentrated gas, and the concentration can be increased by 5 to 10 times. This is equivalent to changing the low-concentration exhaust gas with large air volume that originally needed to be treated into high-concentration gas with small air volume, creating more favorable working conditions for subsequent condensation.

The concentrated gas enters the condensing unit and is liquefied and recovered by cooling. Compared with the direct treatment of raw waste gas, the condensing equipment only needs to face the small air volume gas that has been concentrated 5 to 10 times, the scale can be reduced, and the cooling temperature does not need to be excessively reduced. Research by the membrane technology team of Dalian University of Technology shows that the condensed membrane coupling process can be applied to a variety of oil and gas recovery scenarios such as ethylene, propylene, fluorine-containing gases and aromatics.

Another value of the Wo Hong combined process is the "closed cycle". The condensed non-condensable tail gas returns to the inlet of the membrane module for recycling treatment, and the organic components that have not been liquefied are repeatedly enriched and finally fully recovered. The entire system is driven by electricity without natural gas consumption, and there is noactivated charcoalSuch as replacement of consumables, no hazardous waste, the overall recovery rate can reach more than 95%.

Wo Hong gas separation membrane is suitable for aromatics, alkanes, alkenes, halogenated hydrocarbons, alcohols, esters, ketones, ethers and other common organic compounds. It is recommended to complete the working condition detection before selection, and match the membrane module specifications according to the composition and concentration. Membrane is responsible for concentration, condensation is responsible for recovery, with the use of VOCs resources is a mature technical route.