针对PTA生产过程中副产物醋酸甲酯水解回收工艺，在已建立的稳态优化模型基础上，进行厂级经济控制。首先确定整个工艺的控制目标与被控变量；再基于"Top-Down"的设计准则设计多回路厂级控制结构CS1；最后利用Aspen Dynamic软件仿真，添加进料流量和进料成分随机扰动，分析动态响应情况和控制效果，并与传统厂级控制结构CS2结果进行对比。仿真结果表明，CS1设计更简单，调节时间更短，稳态误差更小。

Based on the built steady-state optimization model,plant-wide economic control is executed onto the hydrolysis and recovery process of methyl acetate generated in PTA production plant.Firstly,the control objectives and controlled variables of the whole process are confirmed.Then,multi-loops plant-wide control scheme CS1 is designed on the base of "Top-Down" design guidelines.Finally,dynamic response and control effect are analyzed through using Aspen Dynamic software to simulate with adding random disturbances of feed flow and feed composition,which are compared with the results of traditional plant-wide control scheme CS2.Simulation results show that CS1 exhibits a simpler design,a shorter setting time and a smaller steady-state error.

尹俊华(1993-),男,硕士生。