丁二烯萃取精馏装置全流程的过程模拟

Process simulation of extractive distillation for separation of butadiene 1,3

对以Ｎ，Ｎ－二甲基甲酰胺（ＤＭＦ）为溶剂的１，３－丁二烯萃取精馏装置分离的全流程进行了模拟计算。该复杂装置流程中再循环网的寻找及单元最优计算顺序的确定采用Ｗｅｓｔｅｒｂｅｒｇ和Ｓａｒｇｅｎｔ的循迹法完成。通过用单元全部输入替换单元全部输出的方法找到了再循环网的适宜切断位置，由此得到了再循环网直接迭代求解的适宜计算步骤。将全流程模拟计算结果与现场取样点的分析数据进行了比较，结果令人满意。

Simulation calculations were carried out of the extractive distillation process for separation of butadiene 1,3,using DMF(N,N dimethyl formamide) as solvent.Searching for recycle loops and confirmation of an optimum calculation procedure for a unit in this complicated process were accomplished using Westerberg Sargents Path Tracing Method.The proper tearing streams in the recycle loops were obtained through replacing all output streams with all input streams for a unit.As a result, an appropriate sequence of unit calculation in the loops was given for direct iteration solution.Compared with the analytical data by sampling at operating site, the results of simulation calculation were satisfactory.