Energy-Efficient Design of a Novel Double Annular Separation Column Using Pinch Pressure,Industrial & Engineering Chemistry Research

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Energy-Efficient Design of a Novel Double Annular Separation Column Using Pinch Pressure
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-07-09 , DOI: 10.1021/acs.iecr.0c01683
Heecheon Lee ₁ , Haeri Mo ₁ , Kwon Namgung ₁ , Wonjoon Jang ₁ , Jae W. Lee ₁

Affiliation

This study introduces a pinch-based method to design an internally heat-integrated pressure swing distillation (HIPSD) with a double annular column. In the configuration, the annular stripping section of a low-pressure (LP) column partially wraps around the rectifying section of an inner high-pressure (HP) column to minimize exergy loss. In order to enable adequate heat transfer and azeotropic separation, the key factor is setting the pressure of the columns by considering the so-called pinch pressure, which is determined by the minimum temperature approach and circumvention of the azeotropic boundary. This heat integration between two individual columns reflects different overall heat transfer coefficients for each stage, because they are affected by the composition of the fluid and its hydrodynamic characteristics. Each column is also sized to meet hydraulic conditions to ensure separation efficiency. The HIPSD of several azeotropic mixtures was described and the maximum energy savings reached 23.80%.

中文翻译：

夹挤压力作用的新型双环形分离柱的节能设计

本研究介绍了一种基于夹点的方法来设计带有双环形塔的内部热集成变压蒸馏（HIPSD）。在该配置中，低压（LP）色谱柱的环形汽提部分部分围绕内部高压（HP）色谱柱的精馏部分，以最大程度地减少火用损失。为了实现充分的传热和共沸分离，关键因素是通过考虑所谓的收缩压力来设定塔的压力，该收缩压力由最低温度方法和共沸边界的规避确定。两个独立塔之间的这种热集成反映了每个阶段不同的总传热系数，因为它们受流体组成及其流体动力特性的影响。每个色谱柱的尺寸也要满足液压条件，以确保分离效率。描述了几种共沸混合物的HIPSD，最大节能量达到了23.80％。

更新日期：2020-08-12

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