Abstract—

The work considers the application of heat pumps in the extractive distillation of isobutyl alcohol–isobutyl acetate and allyl alcohol–allyl acetate mixtures in complexes consisting of both two-outlet columns and complexes with partially thermally coupled distillation systems. It is shown that the application of heat pumps in some cases provides a reduction in energy costs by more than 30% in the complexes of two-outlet columns and up to 50% in the complexes with partially thermally coupled distillation systems compared to the conventional scheme. Also, the application of internal heat pumps with disposition of the compressor between sections of the extractive column is considered. Such solution is shown to provide a reduction in energy costs by more than 40%; however, its efficiency strongly depends on the physicochemical properties of the mixture. The economic efficiency of the considered schemes is estimated by the criterion of total annual costs. Conditions governing the application efficiency of heat pumps in extractive distillation are formulated based on the obtained data.

中文翻译：

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热泵在萃取精馏中的应用规律

摘要——

这项工作考虑了热泵在异丁醇-乙酸异丁酯和烯丙醇-乙酸烯丙酯混合物的萃取蒸馏中的应用，该混合物由双出口塔和具有部分热耦合蒸馏系统的复合物组成。结果表明，与传统方案相比，在某些情况下，热泵的应用在双出口塔的复合体中将能源成本降低了 30% 以上，在部分热耦合蒸馏系统的复合体中降低了高达 50% . 此外，还考虑了在萃取塔各段之间设置压缩机的内部热泵的应用。这种解决方案被证明可以将能源成本降低 40% 以上；然而，它的效率很大程度上取决于混合物的物理化学性质。所考虑的方案的经济效率是通过年度总成本的标准来估计的。根据获得的数据制定了控制热泵在萃取蒸馏中的应用效率的条件。