深冷空分工艺的模拟与优化

Simulation and optimization of cryogenic air separation process

利用Aspen Plus软件,搭建了深冷空分工艺流程,物性方法选取空分过程常用的Peng-Robinson方程,精馏塔操作复杂,通过灵敏度分析,对上塔和下塔的操作参数进行优化,挖掘生产潜力,得到高纯度的产品气。探究了进料位置、进料量、采出位置与采出量等因素对产品纯度的影响,在最优的工艺条件下,可得到摩尔分数为99.9%的O_(2)、摩尔分数为99.9%的N_(2)和液氮、摩尔分数为99.6%的Ar,产品纯度较高,对实际工厂中精馏塔的参数调节具有一定的指导意义。

By using Aspen Plus software,the deep-cooling air separation process was built.The Peng-Robinson equation commonly used in the air separation process was selected as the physical property method.Through sensitivity analysis,the process conditions of the upper and lower towers were optimized,the production potential was explored,and high purity product gas was obtained.The influence of factors such as feed position,feed amount,extraction position and extraction amount on the purity of the product was explored,which was more helpful for understanding this process.Under the optimal process conditions,O_(2),N_(2),liquid nitrogen and Ar were obtained with the molar fraction of 99.9%,99.9%and 99.6%respectively.The high purity of the product has a certain guiding significance for the parameter adjustment of the rectification tower in the actual factory.