吸附及解吸压力对快速变压吸附床内速度及循环性能的影响

发布时间：2018-04-16 03:07

本文选题：制氧 + 变压吸附　；参考：《工程科学学报》2016年07期

【摘要】：快速(真空)变压吸附循环周期较短,床层压力周期性变化快,使吸附床内流动及传热传质特性变化较大,本文研究吸附及解吸压力对快速变压吸附制氧床内速度及循环性能的影响.快速变压吸附(rapid pressure swing adsorption,RPSA)循环中原料气充压阶段气流速度远大于顺流的气体流速极限值,快速真空变压吸附(rapid vacuum pressure swing adsorption,RVPSA)循环中原料气充压阶段气流速度略大于顺流的气体流速极限值,而RPSA循环和RVPSA循环中放空降压阶段气流速度均较大.在所研究的吸附和解吸压力范围内,RPSA循环和RVPSA循环中气体温度在循环周期内变化均约为10℃,而RVPSA循环中气体温度在循环周期内温度梯度更大.RPSA循环中吸附压力越高,氧气回收率越高,床层因子越小;而RVPSA循环中解吸压力越低,氧气回收率越高,床层因子越小.
[Abstract]:Fast (vacuum) pressure swing adsorption cycle is short, the periodic change of the bed pressure quickly, the change of flow and heat transfer characteristics in the adsorbent bed is large, this paper studies the effects of adsorption and desorption pressure on the rate and cycle performance of rapid pressure swing adsorption bed. Rapid pressure swing adsorption (rapid pressure swing adsorption, RPSA) gas flow limit cycle raw gas pressure stage air speed is far greater than the downstream value rvpsa (rapid vacuum pressure swing adsorption, RVPSA) gas flow rate limit cycle for raw gas pressure stage air velocity larger than the downstream value, while the RPSA and RVPSA circulation in the empty stage air velocity is larger. Buck the adsorption and desorption pressure in the range of research, the temperature of the gas and RVPSA circulation in RPSA in the cycle of change is about 10 degrees Celsius, while air temperature in RVPSA The temperature gradient in the cycle is larger. The higher the adsorption pressure in the.RPSA cycle, the higher the oxygen recovery rate, the smaller the bed factor. The lower the desorption pressure in the RVPSA cycle, the higher the oxygen recovery rate and the smaller the bed factor.

【作者单位】：北京科技大学能源与环境工程学院;江苏昊泰气体设备科技有限公司;北京科技大学冶金工业节能减排北京市重点实验室;
【基金】：国家自然科学基金资助项目(51306017) 应急救生呼吸装备关键技术及产业化资助项目(Z141100000714007)
【分类号】：O647.3

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