摘要
简要介绍ChemCAD软件的功能和应用方法。应用ChemCAD软件中的SCDS精馏模型,在101.325 kPa下,对以乙二醇-氯化锂为复合萃取剂(氯化锂的摩尔分数为2.9%)摩尔分数为11%的乙醇水溶液加盐萃取精馏制取无水乙醇的过程进行模拟计算,并进行了实验验证。考察了加入萃取剂前后乙醇-水体系的气液平衡相图的变化、精馏塔内温度随塔板数分布、精馏塔内气液相流量随塔板数分布、精馏塔内液相不同组分流量随塔板数分布和精馏塔内气相不同组分流量随塔板数分布。精馏塔内在机理比较复杂,可控参数较多,对控制要求较高,但在模拟的基础上进行系统的调节和控制下,可以满足生产要求。模拟结果与实验值符合较好,为工艺开发、工程设计以及对实际生产都有一定的指导意义。
The functions and application methods of ChemCAD were introduced.The SCDS rectification model of ChemCAD software was used in the simulation of the salt extractive distillation process of ethanol-water system at 101.325 kPa,the mole fraction 11% of ethanol solution and ethanediol-lithium chloride（mole fraction 2.9% of lithium chloride） solution as extractant.The simulation results were verified with experiment.The vapor-liquid equilibrium of ethanol-water before and after adding extraction solvent,the temperature distribution,vapor-liquid flow distribution,liquid flow distribution of different components,vapor flow distribution of different components along with tray number change in distillation column were simulated.As the intrinsic mechanism of distillation process is quite complex,there are many controllable parameters,and higher control requirement,but this simulation system can meet the production requirements on the basis of the regulation and control.Simulation results and experimental data agree satisfactorily.It has certain directive significance to real production.
出处
《化学工程》
CAS
CSCD
北大核心
2011年第9期98-102,共5页
Chemical Engineering(China)
