In the treatment of VOCs waste gas, the combined process of compression condensation and membrane separation has become a medium and high concentration organic with recovery value because of its characteristics of both standard emission and solvent reuse.waste gas treatmentmature technology route.
activated charcoaladsorption andRTOCombustion mainly solves the problem of reaching the standard, but the adsorption method transfers organic matter to solid phase and becomes hazardous waste, and the combustion method burns organic matter into carbon dioxide and water, neither of which can achieve solvent recovery. The compression condensation plus membrane separation process integrates compliance and recovery in the same system. The compression condensation unit first liquefies most of the organic solvent from gaseous state to liquid state through graded cooling, and the purity can reach more than 90%, which can be directly reused in production. The membrane separation unit further enriches the residual organic matter in the condensed tail gas and sends it back to the front end for recycling treatment, so that the purified gas meets the discharge standard.
Through this closed cycle design, the total recovery rate of the system can reach more than 95%, and the emission concentration can be stably controlled at a low level to meet the requirements of environmental protection. The process operates with pure physical separation, does not involve combustion, does not produce hazardous waste, not only meets the compliance requirements of end treatment, but also realizes the resource value of solvent reuse. For VOCs waste gas with medium and high concentration and recovery value, compression condensation plus membrane separation is an effective path to recover solvent while meeting the discharge standard. It is recommended to complete the working condition test before selection, and match the equipment specifications according to the concentration, composition and air volume.
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