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http://dx.doi.org/10.5302/J.ICROS.2006.12.9.945

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

Jeong, Su-Yeong (동아대학교 화학공학과)
Kim, Young-Han (동아대학교 화학공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.12, no.9, 2006 , pp. 945-953 More about this Journal
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.
Keywords
energy-efficient distillation; thermally coupled distillation; distillation operation;
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