Compression, condensation, and membrane separation are used to achieve the separation, recovery, and reuse of organic and inorganic gases. This process is widely used in gas treatment of VOCs in petroleum, chemical and pharmaceutical industries. Recovery of various volatile organic solvents including acetone, petroleum ether, dichloromethane and tetrahydrofuran. Achieving compliance with emissions standards. This process is particularly effective for organic solvents containing chloride ion components. Because this kind of chlorine-containing organic solvent waste gas is not suitable for the RTO process.