变压吸附制氧过程传质特性数值分析
Numerical analysis of mass transfer characteristics during pressure swing adsorption oxygen production process
祝显强 1孙媛 1孙宪航1
作者信息
- 1. 常州大学石油与天然气工程学院,江苏常州 213164
- 折叠
摘要
研究了变压吸附制氧过程中吸附时间对制氧性能的影响,提出了利用浓度波传递模型分析变压吸附制氧过程传质特性、计算最佳吸附时间的方法.结果表明,吸附过程中吸附床内氮气浓度波形状随着时间和轴向位置而变化,理想传热传质条件下,氮气浓度波传递速度比实际吸附过程浓度波传递速度快,实际过程中由于传质和传热阻力,浓度波传递速度减少26％.基于浓度波传递模型计算的最佳吸附时间与实验值误差在0.5 s以内.
Abstract
The effect of adsorption time on the performance of pressure swing adsorption(PSA)oxy-gen production process was experimentally investigated and a concentration wave model was proposed for analyzing the mass transfer characteristics and calculating the optimal adsorption time during the PSA process.The results showed that the shape of N2 loading profile at adsorption step changed with time and axial position,and the propagation velocity of the N2 concentration wave with ideal conditions was greater than the practical propagation velocity.The limited heat and mass transfer resistance slowed down the propagation of the concentration wave during the practical adsorption process,and the reduction degree of the concentration wave velocity was about 26％.The errors between the opti-mal adsorption time calculated though the concentration wave model and the experimental adsorption time were within 0.5 s.
关键词
变压吸附/吸附时间/浓度波/制氧过程/数值模拟Key words
pressure swing adsorption/adsorption time/concentration wave/oxygen production/nu-merical simulation引用本文复制引用
基金项目
常州市应用基础研究计划(CJ20235015)
常州大学科研启动项目(ZMF21020032)
常州大学科研启动项目(ZMF21020388)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据