乙醛氧化塔数学模型的研究  

Mathematical Model of the Process for the Oxidation of Acetaldehyde to Acetic Acid

作　　者：章如锋 王树青[1] 王骥程[1] 

机构地区：[1]浙江大学工业控制研究所

出　　处：《高校化学工程学报》1989年第3期81-90,共10页Journal of Chemical Engineering of Chinese Universities

摘　　要：本研究工作旨在为实现乙醛氧化塔的计算机优化控制而建立必需的过程数学模型。该塔是一种多层筛板并流鼓泡塔。本文考虑了乙醛氧化的动力学模型,传质过程及非理想流动等各主要因素,建立起工业氧化塔的数学模型。并提出了计算方法,进行模型仿真计算,与实际数据对照结果是满意的。最后,给出了氧化塔的最优操作条件,为优化控制策略的开发,打下了基础。The acetaldehyde oxidation process is one of the important steps of acetic acid production. The reaction takes place in the multi-stage bubble column and the reaction mechanism is very complicate in which involves gas-liquid mass transfer, hydrodynamics and other deciplines and a set of seriesparalled reaction. There is no doubt that the search for the optimun operating conditions of the bubble column reaction can be meaningful reliable and economical only on the basis of mathematical model for the reactor. Considering some features of the column and physical plant, for the convenience in obtaining the parameters of the modle and solving the model equations. We use the empirical correlations to ecaluate the parameters of the hydrodynamic model, and build up the multi-stage back flow model.According to the reaction kinetic equations, mass transfer and material balances, a set of nonlinear equations solved by iteration can be obtained. The ratio of acetaldehyde and oxygen and reaction temperature are the main variables which govern the oxidation reaction in bubble column. Studing the influence of thess two variables to the reaciton result. Comparing the simulation and the experimental data, the result is satisfied. This proves the feasibility of the modeling reactor. Through the treatment of simulation result, ws have obtained a simpliffied control model. It is useful to realize the optimal control.

关 键 词：乙醛氧化 数学模型 鼓泡塔 非理想流动 传质过程 优化控制 氧化塔 模型仿真 余差 传质系数 

分 类 号：TQ-55[化学工程]