ORGANIC SOLVENT RECOVERING SYSTEM AND ORGANIC SOLVENT RECOVERING METHOD

摘要

An organic solvent recovering system and an organic solvent recovering method are provided which are capable of dealing with an organic solvent safely with respect to the environment by a back-up processor even when the organic solvent leaks into a treated gas from an adsorption tower, in which an adsorptive material, such as granular activated carbon and activated carbon fiber is packed, and which enables the equipment as a whole to be constructed compactly. A treated gas discharged from an organic solvent recovering unit provided with adsorption towers (4) is introduced into a back-up processor (14), in which the organic solvent which has leaked into the treated gas is adsorbed with a gas processed in the back-up processor (14) discharged as a purified gas. This back-up processor (14) comprises a rotary drum type solvent processing mechanism. The content of the back-up processor (14) is then subjected to desorption with a heating medium, and a condensed organic solvent-containing desorbed gas is returned to the adsorption towers (4) in the organic solvent recovering unit.