Effects of discontinuous purge on the oxygen recovery in PSA oxygen concentration process
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摘要: 為了提高變壓吸附制氧過程中氧氣的回收率和體積分數,提出了一種在反吹步驟中采取適當中斷次數和時間的不連續反吹方法,并實驗研究了該方法對氧氣的回收率和體積分數的影響.結果表明:不連續反吹步驟可以顯著提高變壓吸附制氧系統的回收率和產品氣純度;在本實驗條件下,優化后反吹中斷次數為2、反吹中斷時間為0.3s時,與連續反吹相比,氧氣回收率最大提高了9.2%,產品氣中氧氣的體積分數最大提高了4.0%.Abstract: A method of discontinuous purge with appropriate interrupt frequency and interrupt time was proposed to obtain higher oxygen recovery and concentration. The effects of purge steps on the oxygen recovery and concentration during pressure swing adsorption (PSA) oxygen concentration process were investigated experimentally. The results showed that both of oxygen recovery and product purity in the process with discontinuous purge are greater than those with continuous purge. Under the experimental conditions, when the optimized interrupt frequency is 2 and interrupt time is 0.3s, the oxygen recovery and concentration increase by 9.2% and 4.0%, respectively.
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