| 摘要 |
<p>PROBLEM TO BE SOLVED: To conserve clean air at the outlet of a purging column and to shorten a regeneration time, in a pressure swing adsorbing method of compressed air, by raising the temp. of adsorbent to a medium and low temp. range of a specific value by indirectly or directly heating at a time of an adsorbent separating and regenerating process. SOLUTION: In a pressure swing adsorbing method of compressed air, two adsorbing columns 21, 21' packed with an adsorbent composed of a moisture adsorbent increased and decreased corresponding to the amt. of moisture in compressed air and an adsorbent adsorbing carbon dioxide as a composite bed are used and, when one adsorbing tower is in a pressure adsorbing process, the other adsorbing column is in an adsorbent separating and regenerating process under reduced pressure and these processes are alternately performed. Herein, in the adsorbent separating and regenerating process, the temp. of the adsorbent is raised to a medium and low temp. range of 50-90 deg.C by indirect or direct heating. By this constitution, clean air at the outlet of a purging column is conserved and a regeneration time is shortened.</p> |
