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蒸馏是一种特别消耗大量能量的分离操作,因此在蒸馏系统的设计和操作中对有效能的利用给予适当考虑极为重要。如同其他单元操作,由蒸馏塔及其有关热交换器网络组成的蒸馏系统的热分析,向来是根据以热力学第一定律为基础的能量平衡考虑能量的利能来完成的;然而,鉴于必须同时从能量观点定性的分析这些系统,也考虑了以熵及有效能平衡和热力学第二定律为基础的分析。
Distillation is a separation operation that consumes a great deal of energy in particular, so it is important to give due consideration to the use of available energy in the design and operation of the distillation system. As with other unit operations, the thermal analysis of a distillation system consisting of a distillation column and its associated heat exchanger network has traditionally been done based on the energy balance taking energy into consideration based on the first law of thermodynamics; however, given the necessity of simultaneous Qualitative analysis of these systems from the energy point of view also takes into account the analysis based on the entropy and effective energy balance and the second law of thermodynamics.