Abstract:
In this thesis, the increasing of control performance of the butyl acetate production process was studied. The simulation was carried out by commercial software Aspen Plus 2006 and Aspen Dynamics 2006, to simulate the process in steady state and dynamics mode, respectively. The process responses of different control structures were compared and the control performances were evaluated via disturbance test.
For the research methodology, firstly the control performance of the traditional control structure (CS0) was studied and re-tuned to obtain better control response (CS0M). Secondly the three new control structures were designed in order to increase the control response CS1, CS2 and CS3. Thirdly, the control performances of all control structures were evaluated by introducing disturbances and setpoint change.
The simulation results showed that the control performances of the new designed control structures give better responses than the re-tuned control structure. However, in case of setpoint change and composition disturbance change, the CS1 gives better IAE values than CS2, CS0M, CS3 and CS0, respectively and the case of temperature disturbance change, the CS1 gives better IAE values than CS0M, CS2, CS3 and CS0, respectively.