摘要
在合理假设的前提下建立间歇精馏过程的严格动态模型,此模型按精馏塔的结构分解为:再沸器、塔板、冷凝器、回流釜、分配器及产品罐模型等6个子模型,塔板子模型考虑了液相持液量。基于Cape-Open标准采用面向对象程序设计方法,实现各个子模型程序,将各个子模型的参数及解算方法封装在各自的类中,利用四阶龙格库塔积分方程,采用逐板计算法由塔釜至产品罐自下而上地求解该模型。最后引入一3组份混合物间歇精馏实例,模拟结果较好地反映了该物系间歇精馏的动态特征,表明该模型准确可靠,所开发的系统稳定。
Rigorous dynamic model for batch distillation is established on the basis of reasonable assumptions, the model is divided into six sub-models according to the structure of batch distillation, including reboiler, tray, condensor, reflux, divider and product drum, vapor holdup on the tray is ignored, but liquid holdup is calculated. Then the Batch distillation simulation system is developed by C ＋ ＋ programming language using object-oriented technology according to Cape-Open standards, in which parameters and solutions of every sub-models are encapsulated in classes such as REBOILER, REFLUX, TRAY etc. 4-Rank Runge-Kutta is used to integrate the differential equations, and the whole model is calculated from the bottom to the top step by step, i.e. from the reboiler to the product drum. The three-component mixture is illustrated as an example in the end of the paper, the simulation results show the dynamic performance of the mixture preferably during batch distillation, which shows the models are effective and reliable, and the developed system is steady.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2007年第7期935-938,共4页
Computers and Applied Chemistry
关键词
间歇精馏
模拟
动态模型
开放式
batch distillation, simulation, dynamic model, Cape-Open
