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증류공정의 비간섭 농도제어계 구성

design of Decoupled Composition Control Loops of a Distillation Column

HWAHAK KONGHAK, June 1989, 27(3), 252-259(8), NONE
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Abstract

증류공정에서 적은 간섭효과를 가지는 제어계 구성방법을 단일성분 및 이성분 농도제어계에 대해 정상상태 모사연구를 통하여 제시하였다. 먼저 단일성분 농도제어에서는 운전조건의 원하는 생산물을 탑저 혹은 탑상부로 유출시키지 않고 완전히 회수하는 경우와 어느 정도 유출을 허용하는 경우로 나누어짐을 알 수 있었으며 이들 운전조건에 따라 서로 다른 제어계가 제시되었다. 단일성분 농도제어계의 결과를 확장하여 이성분 농도계의 구성방법도 제시하였다. 이 경우는 운전조건을 네가지의 서로 다른 상황으로 분류할 수 있었으며 각 상황에 적합한 제어계를 제시하였다.
Design methods of composition control loops of a distillation column, which give small interaction ef-fects, were proposed for two different cases, single- and dual-composition controls, through steady-state simulation study. In case of the single-composition control, the operating conditions could be catagorized into two different ones, on one hand where the desired product is completely recovered without loss and on the other hand where a certain amount of the desired product is allowed to emanate through the other end of the column. Different control loops were suggested depending on the operating conditions for each case. By extending the results of the single-composition con-trols, design methods for dual-composition control loops were also proposed. In this case, the operating conditions could be divided into four different ones and an appropriate control loop which give minimum interaction effects was suggested for each case.

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