Simulation–Optimization-Based Design of Crude Oil Distillation Systems with Preflash Units,Industrial & Engineering Chemistry Research

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Simulation–Optimization-Based Design of Crude Oil Distillation Systems with Preflash Units
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-04-12 , DOI: 10.1021/acs.iecr.7b05252
Minerva Ledezma-Martínez ₁ , Megan Jobson ₁ , Robin Smith ₁

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In energy-intensive crude oil distillation systems, with their distillation units and heat recovery systems, preflash units can create opportunities to reduce demand for fired heating and increase heat recovery. As holistic, systematic design methodologies are not available for design of crude oil distillation systems with preflash units, this work proposes a simulation-based design approach, where the objective is to minimize fired heat demand of the system. The approach exploits interactions between the separation and heat recovery systems, considering product quality and yield. Rigorous distillation models in Aspen HYSYS, pinch analysis, and randomized optimization (a genetic algorithm) are employed, via a MatLab interface, to minimize hot utility demand by optimizing operating variables and one structural variable, namely, the feed location of the preflash vapor. A case study demonstrates the approach, showing that a preflash unit can reduce hot utility demand but that the system is vulnerable to yield losses.

中文翻译：

带有预闪蒸单元的原油蒸馏系统的基于仿真优化的设计

在高耗能的原油蒸馏系统中，借助其蒸馏装置和热回收系统，预闪蒸装置可以创造机会减少对燃烧加热的需求并提高热回收率。由于整体，系统的设计方法不适用于带有预闪蒸单元的原油蒸馏系统的设计，因此，这项工作提出了一种基于仿真的设计方法，其目的是最大程度地减少系统的燃烧热需求。考虑到产品质量和产量，该方法利用了分离和热回收系统之间的相互作用。通过MatLab接口，使用Aspen HYSYS中的严格蒸馏模型，收缩分析和随机优化（遗传算法），通过优化操作变量和一个结构变量（即，预闪蒸气的进料位置。案例研究证明了该方法，表明预闪装置可以减少公用事业的需求，但该系统易受产量损失的影响。

更新日期：2018-07-14

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