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Improved Operability in a Fully Thermally Coupled Distillation Column with an Intermediate Heat Exchanger

중간 열교환기를 이용한 열복합 증류탑의 운전성 향상

  • 정수영 (동아대학교 화학공학과) ;
  • 김영한 (동아대학교 화학공학과)
  • Published : 2006.08.01

Abstract

Though a fully thermally coupled distillation column consumes less energy than an original column, it is not widely implemented in practice due to its operational difficulty. A new fully thermally coupled distillation column is proposed for the operability improvement, and its performance is investigated. The main improvement is the separation of a main column to give an upper and lower columns and the installation of an intermediate heat exchanger between them to regulate the fluctuation of product compositions. A proper manipulation of column pressure in the separated main columns made easy vapor flow without a compressor. The operability improvement is examined in a hexane process from the dynamic simulation using a commercial design software HYSYS. The simulation results indicate that the coupling among inputs and outputs is loosened to make easy manipulation of product compositions in the proposed distillation system.

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