A hybrid heat integration scheme for bioethanol separation through pressure-swing distillation route
A hybrid heat integration scheme for bioethanol separation through pressure-swing distillation route
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DOI：
10.1016/j.seppur.2015.01.003
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发表时间：
2015-03
影响因子：
8.6
通讯作者：
B. Kiran;A. Jana
中科院分区：
文献类型：
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作者：
B. Kiran;A. Jana
在这篇文章中，提出了一种混合热集成方案的变压精馏（PSD）塔的内部热集成精馏塔（HIDiC）与蒸汽再压缩塔（VRC）相结合。本文的目的有三个方面：首先，它设计了一个HIDiC的PSD系统，减少了内部热交换器的数量。其次，将基于两个非绝热柱之间存在的热驱动力设计的HIDiC和基于同一高压柱的顶部和底部之间存在的热驱动力设计的VRC相结合，得到了一种理想的HIDiC-VRC混合柱构型。第三，它提供了一个全面的比较HIDiC单独和其混合HIDiC-VRC结构参考传统的独立PSD列。为了评估所有这些配置的性能，我们估计两个性能指标，即能源消耗和总的年成本，为一个例子的生物乙醇脱水系统。
In this contribution, a hybrid thermal integration scheme is proposed for a pressure-swing distillation (PSD) column by combining an internally heat integrated distillation column (HIDiC) with vapor recompression column (VRC). The purpose of this article is three fold: first, it designs a HIDiC for a PSD system with a reduced number of internal heat exchangers. Second, it develops a hybrid column configuration by integrating that HIDiC, which is devised based on the thermal driving force existed between the two diabatic columns, and VRC that is devised based on the thermal driving force existed between the top and bottom of the same high pressure column, yielding an ideal HIDiC–VRC configuration. Third, it provides a comprehensive comparison between the HIDiC-alone and its hybrid HIDiC–VRC structure with reference to a conventional standalone PSD column. To evaluate the performance of all these configurations, we estimate the two performance indexes, namely energy consumption and total annual cost, for an example of a bioethanol dehydration system.