Eco-Efficient Self-Heat Recuperative Vapor Recompression-Assisted Side-Stream Pressure-Swing Distillation Arrangement for Separating a Minimum-Boiling Azeotrope,Industrial & Engineering Chemistry Research

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Eco-Efficient Self-Heat Recuperative Vapor Recompression-Assisted Side-Stream Pressure-Swing Distillation Arrangement for Separating a Minimum-Boiling Azeotrope
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-06-26 , DOI: 10.1021/acs.iecr.0c01964
Shunjin Yang ₁ , Qingjun Zhang ₁ , Youguang Ma _{1,

2} , Xigang Yuan _{1,

2} , Aiwu Zeng _{1,

2}

Affiliation

The feasibility and performance of the strengthened vapor recompression-assisted side-stream pressure-swing distillation configuration with preheating and/or precooling the column feed stream(s) to the bubble point are assessed with separating minimum-boiling ethyl acetate and ethanol azeotrope as an illustrative example. The efficient analysis tool of heat exchanger network synthesis is used to achieve reasonable heat recovery within the process and reduce the unnecessary utility consumptions. The self-heat recuperative vapor recompression-assisted side-stream pressure-swing distillation arrangement with pretreating all feed streams to their bubble points, as the eco-efficient flowsheet, can achieve reductions of 72.62% in energy consumption rates, 89.84% in CO₂ emissions, and 24.92% in total annual cost (TAC) as well as an enhancement of 253.47% in thermodynamic efficiency when compared to the conventional side-stream pressure-swing distillation process. Besides, a method that can quickly determine the best combination of pretreating feed stream(s) to bubble point(s) is given, which can potentially reduce the calculation complexity.

中文翻译：

用于分离最小沸点共沸物的生态高效的自热回热蒸汽压缩辅助侧流压力旋转蒸馏装置

通过将最低沸点的乙酸乙酯和乙醇共沸物分离为预沸物，评估了采用预热和/或预冷却塔进料流至鼓泡点的强化蒸汽再压缩辅助侧流变压蒸馏配置的可行性和性能。说明性的例子。热交换器网络综合的有效分析工具可用于在过程中实现合理的热回收并减少不必要的公用事业消耗。采用自热换热蒸汽再压缩辅助侧流变压蒸馏装置，将所有进料流预处理至其起泡点，这是一种生态高效的流程，可实现能耗率降低72.62％，CO ₂降低89.84％与传统的侧流变压蒸馏工艺相比，它的总排放量和总年度成本（TAC）为24.92％，热力学效率提高了253.47％。此外，给出了一种可以快速确定预处理进料流与起泡点的最佳组合的方法，该方法可以潜在地降低计算复杂度。

更新日期：2020-07-22

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