Abstract: Feasibility and effectiveness to execute temperature control on a Kaibel dividing-wall column (KDWC) is systematically addressed with the separation of a quaternary mixture of methanol,ethanol,n-propanol,and n-butanol as an illustrative example.In terms of sensitivity analysis and steady-state deviation minimum deviation method,a 5×5 temperature control system is derived.Although it can effectively deal with feed composition disturbances,it leaves fairly large steady-state deviations in product qualities in face of feed flow rate disturbances.Since system interaction and in-column pressurevariations are the primary reasons for the unsatisfactory behavior,another 5x5 temperature difference control system is derived based on the singular value decomposition principle.Closed-loop simulation results show that this system can effectively deal with both feed composition and flow rate disturbances,and achieve tight product quality control.These outcomes demonstrate that the application of temperature inferential control strategy is still feasible and effective in spite of the complicated dynamics and degraded controllability of KDWC.
刘蕊, 钱行, 张亮, 陈海胜, 苑杨, 王韶锋, 黄克谨. Kaibel隔壁塔的温度温差控制[J]. 现代化工, 2021, 41(2): 219-228.
LIU Rui, QIAN Xing, ZHANG Liang, CHEN Hai-sheng, YUAN Yang, WANG Shao-feng, HUANG Ke-jin. Control on temperature and temperature difference of a Kaibel dividing-wall column. Modern Chemical Industry, 2021, 41(2): 219-228.
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