PRESSURE SWING ADSORPTION TYPE PRODUCTION OF OXYGEN AND APPARATUS THEREFOR

摘要

PURPOSE:To provide a method for producing oxygen by which the high-purity oxygen of >=95% oxygen concentration can economically be obtained according to a pressure swing adsorption type method and an apparatus therefor. CONSTITUTION:This pressure swing adsorption type method for producing oxygen is to use a gas obtained in a desorption recovery step for adsorption cylinders in a rough oxygen concentration part and a gas prepared from a regenerating step for the adsorption cylinders in a high oxygen concentration part as a purging gas for a purging step for the adsorption cylinders in the rough oxygen concentration part in roughly concentrating the oxygen in raw material air in the rough oxygen concentration part 10 having the adsorption cylinders filled with an oxygen adsorbent and then concentrating the roughly concentrated oxygen from the rough oxygen concentration part as a raw material in the highly oxygen concentrating part 20 having the adsorption cylinders filled with a nitrogen adsorbent.