Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Dynamic Behavior of a Modified Thermally Coupled Distillation Column

변형 열복합 증류탑의 동적 특성

  • Hwang, Kyu Suk (Department of Chemical Engineering, Pusan Natl. University) ;
  • Sung, Ick Gi (Department of Chemical Engineering, Dong-A University) ;
  • Kim, Young Han (Department of Chemical Engineering, Dong-A University)
  • 황규석 (부산대학교 화학공학과) ;
  • 성익기 (동아대학교 화학공학과) ;
  • 김영한 (동아대학교 화학공학과)
  • Received : 2009.03.04
  • Accepted : 2009.05.04
  • Published : 2009.06.30
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Abstract

A thermally coupled distillation system is constructed using two columns used in a conventional two column system, and its operability is examined by investigating the dynamic behavior. For the control of three product specifications, the step response test is performed and a $3{\times}3$ control structure using flow rates of overhead and side products and vapor boilup is suggested. The performance of the proposed control system indicates that the specification control of bottom product is the most difficult but the operation of the proposed system is available.

보통의 2탑 증류시스템에서 사용하는 2기의 증류탑을 활용하여 열복합 증류시스템을 구성하고, 제안된 증류탑의 운전특성을 알아보기 위하여 시스템의 동특성을 조사하였다. 계단응답을 이용한 3가지 제품의 제어 방안을 알아내기 위하여, 상부제품의 유량, 중간제품의 유량, 재비기의 증기발생량을 변화하였다. 그 결과로부터 $3{\times}3$의 제어구조를 제시하였다. 제안된 제어시스템에 PI 제어기를 사용하였을 때의 제어성능을 조사한 결과 하부제품의 농도관리가 가장 어려움을 알 수 있었으나, 본 연구의 증류시스템 운전이 가능함을 알았다.

Keywords

Acknowledgement

Supported by : 동아대학교

References

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