METHOD FOR REGENERATING ADSORPTION TOWER

PROBLEM TO BE SOLVED: To provide a method for regenerating an adsorption tower by which a decomposable solvent is completely recovered in dry desorption, and the equipment cost and running cost are reduced when an inert gas is used as the desorption gas. SOLUTION: A solvent adsorbed on the fixed adsorption bed in an adsorption tower 1A is dry-desorbed to regenerate the adsorption tower. In this case, the inside of the adsorption tower 1A is evacuated by a vacuum pump 6 and desorbed, a solvent is condensed 7 from the desorption gas and recovered 8, and the uncondensed gas is returned to the tower 1A in the circulating line. A clarified gas 24 is then supplied to the adsorption tower, the gas passed through the adsorption bed is discharged outside the circulating line to purify the adsorption bed. Accordingly, the bed is heated 2A in the desorption and recovery stages, and the inert gas 24 is preferably used as the circulating gas or clarifying gas in the desorption and recovery stages.