文献类型：期刊文献

中文题名：板式反应精馏塔的模拟计算——修正的Newton-Raphson法

英文题名：Simulation of Distillation with Simultaneous Chemical Reaction——Modified Newton-Raphson Method

作者：张瑞生[1]

机构：[1]华东化工学院联合化学反应工程研究所

年份：1989

卷号：15

期号：1

起止页码：25

中文期刊名：华东化工学院学报

收录：国家哲学社会科学学术期刊数据库;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：精馏;板式塔;精馏塔;数学模拟

外文关键词：mathematical simulation; computational method; plate tower; distillation; Newton-Raphson method

摘要：通过选择合适的迭代变量和分层迭代的方法,提出了一种计算机内存少、机时省且稳定收敛的板式反应精馏塔的数学模拟算法。该算法将模型方程分成内外两层迭代求解。内层以塔板上各组分的液相浓度为迭代变量,以物料衡算方程为残差函数,用Newton-Raphson法求解;外层以各板上汽相流量为迭代变量,用直接迭代法求解焓平衡方程。该算法能适用于非理想性较强,反应级数高于一级的系统。并附计算实例。
Distillation with simultaneous chemical reaction represents a special area of distillation technology, and its economical advantages have been proved. The objective of this study is to present a computation method for handling chemical reaction in an equillibrium stage device. Reported here is a technique based on the Newton-Raphson method for solving the model equations which describe distillation with simultaneous reaction. Mole fractions of components x_(ij) and vapour flow rates V_i on eaeh stage are selected as iterative variables. An outer iteration loop and an inner iteration loop are involved. The inner loop is for x_(ij) and the outer one for V_j. The Newton-Raphson method is used for the convergence of the inner loop with material balance equations being residual functions, this procedure is suitable for highly nonideal solutions. A rapid and stable convergence is achieved without the use of damping factors. Numerical examples are presented.