GASEOUS SOLVENT RECOVERY DEVICE AND GASEOUS SOLVENT RECOVERY METHOD

PROBLEM TO BE SOLVED: To enable improving not only absorption efficiency of gaseous solvent in absorbers but also recovery efficiency of the solvent. SOLUTION: This device is provided with first and second absorbers 1, 2 for making liq. absorbent absorb gaseous solvent to collect it, first and second evaporators 3, 4 for evaporating the solvent from the liq. absorbent to separate it, and a condensing part and a rectifying part for condensing the vapor of the separated solvent and further rectifying it. While the liq. absbrbent is circulated in a circulating path constituted of the first absorber 1, the first and second evaporators 3, 4, and the second absorber 2, it is repeatedly used in the first and second absorbers 1, 2. In the first evaporator 3, it is treated under atmospheric pressure, and in the second evaporator 4, it is treated under vacuum or reduced pressure.