化工学报2019，Vol.70Issue(10)：4002-4011,10.DOI:10.11949/0438-1157.20190172
基于双回流变压吸附工艺的空气分离模拟及分析
Simulation and analysis of dual-reflux pressure swing adsorption for air separation
汪亚燕 1田彩霞 1丁兆阳 1唐忠利 1张东辉1
作者信息
- 1. 天津大学化工学院,化学工程研究所,化学工程联合国家重点实验室,天津300350
- 折叠
摘要
Abstract
Double reflux pressure swing adsorption is a pressure swing adsorption process in which the feed is carried out in the middle of the adsorption tower, and the top and bottom of the tower are respectively reflowed with light and heavy components, and two high purity and high recovery product gases can be simultaneously produced. In this paper, a LiLSX zeolite synthesized by the laboratory was used as the adsorbent, meanwhile, numerical simulation of a two-bed dual-reflux pressure swing adsorption air separation process was carried out with feed mixture (78%N2/21%O2/1%Ar) using the commercial software Aspen Adsorption. The adsorption and desorption pressure are 2 bar and 0.3 bar, the feed flow rate is 0.4 m3/h, the light and the heavy component reflux flow rate are 0.095 L/min and 5.22 L/min. Ultimately, the purity of O2 and N2 reach 95.67% and 98.25% in their respective product gas, and the recovery rates are 94.60% and 99.91%, respectively. Besides, effects of operating parameters (the feed position, duration of feed step, light reflux flow rate, heavy product flow rate) on the process performances were investigated, which was more helpful for understanding this process.关键词
双回流/变压吸附/空气分离/LiLSX沸石/数值模拟Key words
dual-reflux/pressure swing adsorption/air separation/LiLSX zeolite/numerical simulation分类
化学化工引用本文复制引用
汪亚燕,田彩霞,丁兆阳,唐忠利,张东辉..基于双回流变压吸附工艺的空气分离模拟及分析[J].化工学报,2019,70(10):4002-4011,10.
