This study continues our research about dividing-wall distillation columns (DWCs) with upper and lower partitions (Ind. Eng. Chem. Res. 2016, 56, 952). Thermodynamic efficiencies and heat demands are investigated to offer a more complex point of view about distillation technologies. Rigorous simulations of nine distillation systems are completed, and the results are evaluated. Among the separation systems there are conventional direct and indirect distillation systems and energy-integrated ones, that is, DWCs with upper and lower partition, columns with side stripper or side rectifier, the fully thermally coupled distillation column, the sloppy system, and a direct sequence with backward heat integration are examined using three different alcohol mixtures. Results are obtained from rigorous simulations using exergy analysis. Thermodynamic efficiencies are in agreement with the expectations based on previous researches. On the basis of the thermodynamic efficiencies and heat demands the direct sequence with backward heat integration proved to be the most suitable distillation technology for the mixtures examined. The DWC with upper partition shows also promising behavior.

中文翻译：

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集中分馏塔上下隔板的能量综合蒸馏技术的热力学和火用分析

本研究持续了我们对分割壁的蒸馏塔（部门委任证）与上和下分区（研究工业主机。化学式RES。2016，56（952）。对热力学效率和热量需求进行了研究，以提供有关蒸馏技术的更复杂的观点。完成了对九个蒸馏系统的严格模拟，并对结果进行了评估。在分离系统中，有常规的直接和间接蒸馏系统以及能量集成的系统，即具有上下隔板的DWC，带有侧汽提塔或侧馏塔的塔，全热耦合蒸馏塔，草率系统和直接分离。使用三种不同的酒精混合物检查了向后热整合的顺序。结果是使用火用分析从严格的模拟中获得的。热力学效率与基于先前研究的预期一致。根据热力学效率和热量需求，逆向热集成的直接顺序被证明是最适合所检查混合物的蒸馏技术。具有较高分区的DWC也显示出良好的行为。