In the technological chain for the recovery and utilization of VOCs, the membrane separation unit plays a crucial role in “separation and assurance.” Relying on the research and development platform of Henan Oil and Gas Recovery Engineering Technology Research Center, Wohong VOCs separation membrane provides core separation support for the recovery and treatment of organic waste gas such as alkanes, halogenated hydrocarbons, alcohols, ethers, esters and ketones.
Separation Principle and Process Positioning
The Wohong separation membrane works based on a dissolution-diffusion mechanism. After the mixed gas containing VOCs enters the membrane module, driven by the partial pressure difference between the two sides of the membrane, organic molecules are preferentially adsorbed, dissolved and diffused by the membrane material to form a high concentration of permeable gas (concentrated gas); Air components such as nitrogen and oxygen are intercepted due to slow permeation rate and are directly discharged up to the standard. This process can increase the concentration of VOCs by 5 to 10 times.
In the combined process of "condensation and membrane separation", the task of the separation membrane is to "link the past and the future"-to further enrich the residual organic matter in the tail gas after condensation and send it back to the front end for recycling treatment. Through this design, the system forms a closed cycle, the overall recovery rate can reach more than 95%, and the emission concentration is stable to meet the requirements of environmental protection.
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