| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a benzene vapor removing method and the device remarkably economical in the view point of energy consumption and easy in the post- treatment of a desorbed gas after regeneration in adsorption and regeneration in an adsorption column. SOLUTION: In the method for removing benzene vapor from an air containing benzene vapor in a high concentration, the air containing benzene vapor is supplied to one of plural adsorption columns 21A, 21B packed with an adsorbent such as silica gel and kept at the normal temp. to adsorb benzene contained in the air and is exhausted as a purified gas. On the other hand, the adsorbent, on which benzene is adsorbed, in the adsorption columns 21A, 21B is indirectly heated to a temp. higher by 15-30 deg.C than the adsorption temp. with the pressure in the adsorption columns reduced to <=50Torr to desorb benzene from the adsorbent to be regenerated.</p> |
