Abstract: 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.
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