An improvement scheme for pressure-swing distillation with and without heat integration through an intermediate connection to achieve energy savings
An improvement scheme for pressure-swing distillation with and without heat integration through an intermediate connection to achieve energy savings
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通过中间连接进行热集成和不集成的变压蒸馏的改进方案以实现节能
DOI：
10.1016/j.compchemeng.2018.09.012
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发表时间：
2018-11
影响因子：
4.3
通讯作者：
Gao Jun
中科院分区：
文献类型：
--
作者：
Wang Yinglong;Ma Kang;Yu Mengxiao;Dai Yao;Yuan Rujia;Zhu Zhaoyou;Gao Jun
变压精馏在学术界和工业界得到了广泛的研究。能耗是衡量变压精馏是否优于其他精馏方法的关键标准。在双塔变压精馏分离二元共沸混合物的基础上，提出了一种中间连接的改进流程，以达到节能降耗的目的。所提出的变压精馏被应用于三个案例系统，两个最低沸点的乙酸乙酯/乙醇和甲醇/氯仿的共沸混合物，以及一个最大沸点的乙二胺/水的共沸混合物。分析表明，变压精馏与热集成方案可以降低能耗，降低年总成本。中间连接变压精馏在节能方面具有很好的应用前景。这一优势有助于推动变压精馏在化工流程工业中的应用和整体节能。
Pressure-swing distillation is widely studied in academia and industry. Energy consumption is a key criterion for judging whether a pressure-swing distillation is better than other distillation methods. An improved process with an intermediate connection was developed based on the two-column pressure-swing distillation for separating a binary azeotropic mixture to save energy and reduce the total annual cost. The proposed pressure-swing distillation was applied to three case systems, two minimum-boiling azeotropic mixtures of ethyl acetate/ethanol and methanol/chloroform and one maximum-boiling azeotropic mixture of ethylenediamine/water. According to our analysis, the proposed pressure-swing distillation and heat-integrated scheme can reduce energy consumption and total annual cost. The pressure-swing distillation with the intermediate connection is promising for saving energy. This advantage assists in promoting the application of pressure-swing distillation and overall energy savings in the chemical process industry.
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