| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method which enables more simplified run operations as compared with a conventional method, reduction in power consumption and improvement in equipment cost and operating cost, in a PSA process for producing an oxygen-enriched gas by selectively adsorbing and separating nitrogen from a gaseous raw material contg. oxygen and nitrogen, such as air. SOLUTION: This method comprises: a series of operations, namely, continuously operating adsorption columns A and B, a turbo-blower 8 and a vacuum pump 9, feeding a gaseous raw material to the adsorption column A through a feed port 5A of the column A to adsorb nitrogen, recovering an oxygen- enriched gas from the adsorption column A through an outflow port 7A of the column A and on the other hand, regenerating the adsorption column B during these operations of the adsorption column A; and repeating the above series of operations while successively and alternately switching the run of each of the columns A and B from one of the adsorption and regeneration runs to the other. In the method, the gaseous raw material is fed into the adsorption column A or B under pressure by using a low pressure turbo-blower having a <=0.3 kg/cm<2> G maximum delivery pressure.</p> |
