Energy‐Efficient Process with a Decanter to Separate Toluene‐Methanol‐Water Ternary Azeotropic Mixtures,Chemical Engineering & Technology

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Energy‐Efficient Process with a Decanter to Separate Toluene‐Methanol‐Water Ternary Azeotropic Mixtures
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-03-24 , DOI: 10.1002/ceat.201800039
Yixin Ma _{1,

2} , Jun Gao ₁ , Yong Wang ₃ , Zhaoyou Zhu _{3,

4} , Yinglong Wang _{3,

4}

Affiliation

An extractive distillation process with two columns and a decanter was proposed to separate ternary toluene‐methanol‐water azeotropic mixtures in a previous study. Based on this process, six processes were established to explore further energy‐efficient schemes to separate the ternary azeotropic system. The optimal parameters of the process were determined in terms of the minimum total annual cost (TAC). The processes with heat integration perform better than those with a side stream or thermal coupling in terms of energy savings and TAC reduction. A process in which both the feed stream of the extractive distillation column and the entrainer recovery column are preheated by the entrainer recycle stream can reduce energy consumption by up to 27.69 % and TAC by 21.36 %.

中文翻译：

利用a析器分离甲苯-甲醇-水三元共沸混合物的节能工艺

在先前的研究中，提出了采用两塔和倾析器的萃取蒸馏工艺，以分离三元甲苯-甲醇-水共沸混合物。基于此过程，建立了六个过程来探索进一步的节能方案以分离三元共沸体系。该过程的最佳参数是根据最小年度总成本（TAC）确定的。就节能和减少TAC而言，具有热集成的过程比具有侧流或热耦合的过程表现更好。通过夹带剂再循环料流对萃取蒸馏塔的进料流和夹带剂回收塔两者进行预热的工艺可以减少多达27.69％的能耗和TAC 增长21.36％。

更新日期：2020-03-24

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