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Design and Optimization of Extractive Thermally Coupled Distillation System

추출 열 통합 증류계의 설계 및 최적화

  • Cho, Hoon (Department of Chemical Engineering, Chungnam National University) ;
  • Woo, Daesik (Department of Chemical Engineering, Chungnam National University) ;
  • Choi, Yumi (Department of Chemical Engineering, Chungnam National University) ;
  • Han, Myungwan (Department of Chemical Engineering, Chungnam National University)
  • 조훈 (충남대학교 화학공학과) ;
  • 우대식 (충남대학교 화학공학과) ;
  • 최유미 (충남대학교 화학공학과) ;
  • 한명완 (충남대학교 화학공학과)
  • Received : 2011.06.21
  • Accepted : 2011.07.25
  • Published : 2012.04.01

Abstract

In this study, thermally coupled distillation system and conventional two-column process were investigated for extractive distillation. The two processes were simulated and optimized using Aspen plus. Objective function for the optimization was energy consumption and optimization results to reduce energy consumption were used to get guidelines for design and operation for the two extractive distillation processes. Comparison of these two processes showed that thermally coupled distillation system provided better energy efficiency and lower capital cost than conventional distillation system.

본 연구에서는 두 개의 증류탑으로 이루어진 기존 추출 증류 공정과 열 통합된 연속식 증류탑으로 이루어진 추출열 통합 증류 공정의 시스템에 대하여 에너지가 가장 적게 드는 최적의 구조 및 운전조건을 실현하기 위하여 Aspen plus의 최적화 기능을 이용하여 최적화를 행하였다. 두 구조 모두 추출제를 재순환시키는 구조로 모사하였다. 최적화 문제를 구성하여 에너지 비교, 다른 조성비, 추출제의 양에 따라 최적 조건의 변화를 파악하여 최적화된 공정 조업조건 및 설계지침을 제시하였다. 두 구조의 비교에서 열 통합 증류 시스템이 기존의 증류시스템에 비하여 에너지 효율 및 장치비 면에서 보다 나은 것으로 나타났다.

Keywords

References

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Cited by

  1. Energy saving and thermodynamic efficiency of a double-effect distillation column using internal heat integration vol.29, pp.12, 2012, https://doi.org/10.1007/s11814-012-0106-0