| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce running costs by a method wherein, in an energy saving operation, adsorbents in one of two adsorption cylinders and those in the other one are caused to be concurrently deteriorated to suppress variation in dew point when a normal operation is restored, whereby replacement operation of adsorbents of both the cylinders can be simultaneously carried out. SOLUTION: In the method for dehumidifying compressed air, a drying process wherein humid compressed gas is fed into one of adsorption cylinders 3, 4 each filled with adsorbents to effect adsorption and dehumidification and a regeneration process wherein a part of dry gas obtained in the drying process is led to the other adsorption cylinder wherein the moisture-adsorptivity of the adsorbents is lowered in the drying process in the preceding step to desorb moisture from the adsorbents, thereby purging the desorbed moisture from the cylinder, are parallelly performed. The drying process and regenerating process are carried out by alternately switching both the cylinders to each other to continuously supply dry gas. In that method, an energy saving operation is performed under predetermined conditions to suspend the regeneration process, and a regeneration process is carried out at predetermined cycles during the energy saving operation.</p> |
