多孔介质变压吸附过程仿真计算Numerical Simulation on PSA Process by Porous Medium
肖露,张玉文,吕阳,马艳红
XIAO Lu,ZHANG Yu-wen,LV Yang,MA Yan-hong (Xi′an Jiaotong University
摘要(Abstract)：
根据多孔介质变压吸附理论,对试验室小型变压吸附制氧系统吸附过程进行了数学仿真计算,结果表明:减小吸附床层的间隙率可以改善氧产品的纯度,压缩机的功耗会增加;随着原料进气流量的增加,进出口压降呈线性增加,产品纯度则按非线性减小;当吸附床层高径比增加时,吸附柱的压力降呈线性增加,但在较低值时的增加对产品纯度改善较好;为了更好地减小吸附柱的压力降,达成节能的效果,建议间隙率控制在0.35~0.4之间,高径比控制在9.5~12之间,操作时将空气进气流量调到6.2m3/h左右为宜。
According to the theory of pressure swing adsorption(PSA) by porous medium,numerical simulation was studied on the adsorption process of a small-scale oxygen system in laboratory.The result are stated as follows:the purity of the product increases with the decrease of void fraction between each layer of the adsorbent bed,while more energy is to be consumed.With the increase of air-in volume flow,the pressure drop between the inlet and outlet of the column increases by linear trend,but the product purity reduces not by linear trend.When the ratio of height to diameter of the adsorption bed increases,the pressure drop between the inlet and outlet of the column rises up by linear trend,but the product purity increases quickly at the lower value.In order to reduce the pressure drop between the inlet and outlet of the column,and enhance energy saving effect of adsorption,the best void fraction is supposed to be between 0.35 and 0.4,the best ratio of height to diameter is between 9.5 and 12,and the best air-in volume flow in operation is about 6.2 steres per hour.
关键词(KeyWords)：
变压吸附;仿真;间隙率
pressure swing adsorption;numerical simulation;void fraction
基金项目(Foundation):
作者(Author):
肖露,张玉文,吕阳,马艳红
XIAO Lu,ZHANG Yu-wen,LV Yang,MA Yan-hong (Xi′an Jiaotong University
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