PROCESS AND APPARATUS FOR GENERATING HIGH PURITY NITROGEN

摘要

A PSA (pressure swing adsorber) system for producing high purity nitrogen from compressed air containing a pressure swing dryer to dry the compressed air arranged for regeneration by oxygen enriched desorption effluent gasses from the PSA towers. A product nitrogen purge assists in desorption of the PSA towers and leads to improved yield. The system is characterized by capability for yields of 99.5% nitrogen plus argon to exceed about 25% and an efficiency of about 60 volumes of the 99.5% product per volume of adsorbent per hour.