Compression condensation plus membrane separation, physical separation without secondary pollution

in VOCswaste gas treatmentIncineration and adsorption are two traditional paths. Incineration burns organic matter into carbon dioxide and water, and the emission gas may carry combustion by-products such as nitrogen oxides; adsorption transfers organic matter from the gas phase to the solid phase, saturationactivated charcoalbecome hazardous waste. The combined process of compression condensation and membrane separation takes pure physical separation as the core, and does not produce new pollutants in the whole process.

Activated carbon adsorption in operation will produce saturated carbon. The replaced carbon is stored and disposed of in accordance with hazardous waste management requirements, the enterprise needs to bear the disposal costs, and the management process is more cumbersome. When the incineration method treats halogen-containing waste gas, by-products such as dioxins may be generated under high temperature conditions, and hydrogen chloride has a corrosion risk to the equipment. Physical separation processes do not address these issues.

The operation process of the compression condensation plus membrane separation process is essentially the physical transformation of organic matter between the gas phase and the liquid phase. The condensation unit liquefies the organic matter by cooling, and the membrane separation unit relies on the difference in molecular permeation rate for concentration and separation. The whole process does not involve chemical reactions, does not introduce adsorption materials, and does not produce new solid or gas phase pollutants. With electricity as the driving energy, no consumption of natural gas, no combustion process, no emissions of combustion by-products.

From the perspective of material flow, the organic matter entering the system is finally collected and reused in the form of liquid solvent; the air entering the system is discharged after the organic matter is separated. A closed loop is formed inside the system, and there is no link to transfer pollutants to the outside world, nor does it produce secondary pollutants that need additional disposal.

The application of the process is based on the premise that the exhaust gas concentration reaches a medium-high level and the solvent in it has a recovery value. When the concentration is low, the condensation efficiency decreases, the recovery economy weakens, and the advantages of physical separation are difficult to give full play. The working condition test shall be completed before selection, and the process matching shall be judged according to the concentration, component and air volume.