反应精馏隔壁塔生产乙酸正丁酯的优化与控制

2016年12月 CIESC Journal ·5066·

December 2016第67卷第12期化工学报 V ol.67 No.12

DOI ：10.11949/j.issn.0438-1157.20160887

陈梦琪，于娜，刘育良，李鲁闽，孙兰义

（中国石油大学（华东）重质油国家重点实验室，山东青岛 266580）

摘要：对反应精馏隔壁塔生产乙酸正丁酯过程进行了模拟、优化与控制的系统研究。利用Aspen Plus 软件模拟乙

酸甲酯与正丁醇的酯交换反应过程，以年总费用（TAC ）为目标函数进行过程优化，通过稳态敏感性分析及相对

增益矩阵（RGA ）判据得到不同的操纵变量与控制变量匹配关系，以此为基础，在Aspen Dynamics 平台建立了若

干控制结构并进行分析对比。结果表明，利用两股反应物呈比例进料可较为有效地抵抗进料扰动，最后提出的无

再沸器热负荷与混合物进料量比值（Q r /F ）控制的改进控制结构CS3，在降低反应精馏隔壁塔控制过程超调量方

面有较大的优越性。

关键词：反应精馏隔壁塔；酯交换反应；TAC ；优化；动态仿真；控制

中图分类号：TQ 028.1

文献标志码：A 文章编号：0438—1157（2016）12—5066—16

Optimization and control of reactive dividing wall column for production of

n -butylacetate

CHEN Mengqi, YU Na, LIU Yuliang, LI Lumin, SUN Lanyi

(State Key Laboratory of Heavy Oil Processing , China University of Petroleum , Qingdao 266580, Shandong , China )

Abstract: This paper focuses on the simulation, optimization and control of the reactive dividing wall column for the production of n -butyl acetate through ester exchange reaction. The optimal operating conditions are obtained with the minimum total annual cost (TAC) as the target function. Different matching relationships between manipulate variables and control variables are determined through the sensitive analysis of steady state relative gain and the Relative Gain Array (RGA) criterion, and then three control structures are built in Aspen Dynamics. It shows that the use of the reactant feed ratio to control the stage temperature is effective to handle the feed disturbances, which presents superior ability in maintaining stability of this system. At last, an improved control structure (CS3) is proposed, which deletes the ratio of reboiler duty and mixture feed rate and shows a great advantage in reducing overshoot of product purities. The specific control structure of CS3 is as follows: the reboiler load of reactive distillation column controls the temperature of the 16th plate of the reactive distillation column directly; ratio of feed rate for n -butanol and methyl acetate/methanol mixture controls the temperature of 28th plate of the reactive distillation column; and the reboiler load of stripping column controls that of the 3rd plate of stripping column directly.

Key words : reactive dividing wall column; transesterification; TAC; optimization; dynamic simulation; control

2016-06-29收到初稿，2016-09-11收到修改稿。

联系人：孙兰义。第一作者：陈梦琪（1992—），女，硕士研究生。

基金项目：国家自然科学基金项目（21476261）；山东省重点研发计

划项目（2015GGX107004）。 Received date: 2016-06-29. Corresponding author: Prof. SUN Lanyi, sunlanyi@https://www.360docs.net/doc/315288890.html, Foundation item: supported by the National Natural Science Foundation of China (21476261) and the Key Research and Development Plan Project of

Shandong Province (2015GGX107004). 万方数据