蒸留塔の両端製品組成制御における干渉と塔の特性との関係

概要

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To reduce the interaction in dual composition control of a distillation column, the authors previously published a noninteracting control system in which the ratios of vapor and liquid flow rates are selected as a pair of manipulated variables. In this paper, the effectiveness of the proposed control system is theoretically confirmed. The interaction between control loops is examined not only at the steady state but also in the high-frequency domain. It is made clear that the proposed control system can always reduce the interaction in the high-frequency domain, independent of column characteristics such as number of stages, output specification and so on. This control system can also make the interaction in the low-frequency domain less than that of the conventional control system. The following facts are also confirmed. By increasing the number of stages, the boil-up rate can be decreased and it makes the interaction between composition control loops weak. From this fact a distillation column having low interaction can be designed.
社団法人化学工学会の論文