| 摘要 |
<p>PURPOSE:To improve desorption efficiency and solvent recovering efficiency and to make a concentration process unnecessary by desorbing an adsorbent without using steam in recovering solvent from a solvent containing gas by adsorption method. CONSTITUTION:In recovering the solvent from the solvent containing gas, an adsorption tower 2 is heated by a heater 4 after finishing adsorption processing, is evacuated by a vacuum pump 7 and is desorbed by passing a heated inert gas with <=1/10 flow rate of a gas to be treated. The desorbed gas is cooled and dehumidified by a water condensation chiller 9, is subzero cooled to a temp. above the m.p. of the solvent and the solvent is recovered in a subzero cooling device 11. The inert gas after the solvent is recovered is fed to the adsorption tower 1 together with the solvent containing gas and is discharged to air. The adsorption tower 2 after the desorption is finished is cooled by passing the inert gas and the inert gas discharged therefrom is cooled and recycled.</p> |
