CAJ | 학술논문

通过Aspen Plus软件首先模拟了醋酸脱水萃取精馏系统。然后在稳态模拟的基础上，为该过程建立了2种控制结构，并采用动态模拟软件Aspen Dynamics考察了在进料流量发生±20%和进料组成中醋酸发生±5 wt%干扰时其控制性能。传统萃取精馏控制结构CS1不能较好地处理-5 wt% HAC进料组成干扰，醋酸产品质量的稳态余差较大，为0.43 wt%。为了减小该稳态余差，在 CS1基础上添加一个温度控制回路，提出一种改进的控制结构 CS2。模拟结果显示，CS2对于进料流量和组成干扰均能处理得较好，将该进料组成干扰的稳态余差降到0.03 wt%。
통과Aspen Plus연건수선모의료작산탈수췌취정류계통。연후재은태모의적기출상，위해과정건립료2충공제결구，병채용동태모의연건Aspen Dynamics고찰료재진료류량발생±20%화진료조성중작산발생±5 wt%간우시기공제성능。전통췌취정류공제결구CS1불능교호지처리-5 wt% HAC진료조성간우，작산산품질량적은태여차교대，위0.43 wt%。위료감소해은태여차，재 CS1기출상첨가일개온도공제회로，제출일충개진적공제결구 CS2。모의결과현시，CS2대우진료류량화조성간우균능처리득교호，장해진료조성간우적은태여차강도0.03 wt%。
The extractive distillation system of acetic acid dehydrate has been simulated by Aspen Plus. Then based on steady state simulation, two control structures have been established. The control performances under ±20 % feed flow rate and ±5 wt% HAC feed composition disturbances have been studied using the dynamic simulation software Aspen Dynamics. The conventional control structure for extractive distillation CS1 cannot handle-5 wt%HAC one feed composition disturbance well,a steady state offsets as large as 0.43 wt%exists for the acetic acid product. In order to reduce the steady state offset, an improved control structure CS2 by adding a temperature control loop based on CS1 has been presented. The simulation results reveal that this improved control structure CS2 can handle both feed flow rate and composition disturbances very well, and the steady state offset of the acetic acid product is reduced to 0.03 wt%for the same feed composition disturbance.