Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Application of An Energy-Efficient Distillation System using Three Columns to Hexane Process

3기의 증류탑을 이용한 에너지 절약형 증류탑의 헥산공정에의 응용

  • Kim, Young-Han (Department of Chemical Engineering, Dong-A University) ;
  • Hwang, Kyu-Suk (Department of Chemical Engineering, Pusan National University)
  • 김영한 (동아대학교 화학공학과) ;
  • 황규석 (부산대학교 화학공학과)
  • Received : 2004.07.15
  • Accepted : 2004.10.06
  • Published : 2005.02.28
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Abstract

Though a fully thermally coupled distillation column-an energy efficient distillation system-consumes less energy, it is not widely implemented in practice due to its operational difficulty. A 3-column distillation system having improved operability is proposed here, and its energy saving performance and application related issues are investigated from the implementation result to a practical hexane process. When an energy integration is employed, the proposed system requires 18% less energy than a conventional 2-column system, which is found from the HYSYS simulation. Though more control loops than the 2-column system are required, the proposed system has better controllability of product compositions and the pressure control of the system is easier.

에너지 절약형 증류시스템인 열복합 증류탑의 에너지 사용량은 적으나 운전이 어렵기 때문에 실제공정에 활용이 잘되지 않고 있어 에너지 사용은 적으면서 운전성이 개선된 3탑 증류 시스템을 제안하여 상업적인 실제공정인 헥산제조공정에 활용할 때의 에너지 절약성능과 실제 활용에서 생겨나는 문제에 대해 조사하였다. 에너지 회수구조를 활용할 경우, HYSYS를 이용한 시뮬레이션의 결과 기존의 2탑 증류 시스템에 비해 18%의 에너지 절감효과가 있음을 알았으며 2탑 증류시스템에 비해 제어루프의 수는 증가되지만 3가지 제품의 조성 조절이 쉽고 각 탑의 운전압력을 쉽게 조절할 수 있는 장점을 갖고 있다.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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