Abstract

An energy performance comparison between a novel thermosyphon-assisted falling film distillation unit and a conventional tray unit was carried out for three mixtures with different relative volatilities: ethanol-water, acetone-isopropanol, and acetone-water. Experimental data from the pilot-scale plant were used as targets in the simulation runs through the Hysys^® software. Thus, the separation performed in the falling film unit was reproduced in a conventional tray column. The thermosyphon-assisted falling film unit required less energy, with reductions of 24% for acetone-isopropanol, 30% for ethanol-water, and 55% for the acetone-water mixture. The energy-use ratio also showed that for each kW consumed in the falling film unit, the conventional unit would consume 1.33 kW for acetone-isopropanol, 1.44 kW for ethanol-water, and 2.21 kW for acetone-water, based in the same separation. Therefore, this novel distillation apparatus is more advantageous as an energy-saving viable option for separating mixtures with different relative volatilities.

摘要

对具有不同相对挥发度的三种混合物：乙醇-水、丙酮-异丙醇和丙酮-水，进行了新型热虹吸辅助降膜蒸馏装置和传统塔盘装置的能源性能比较。来自中试规模工厂的实验数据被用作通过 Hysys ^{®进行模拟运行的目标}软件。因此，在降膜单元中进行的分离在传统的板式塔中重现。热虹吸辅助降膜装置所需的能量更少，丙酮-异丙醇减少了 24%，乙醇-水减少了 30%，丙酮-水混合物减少了 55%。能耗比还表明，降膜装置每消耗1kW，在相同分离条件下，常规装置丙酮-异丙醇消耗1.33kW，乙醇-水消耗1.44kW，丙酮-水消耗2.21kW。 . 因此，这种新型蒸馏装置作为一种用于分离具有不同相对挥发度的混合物的节能可行选择更为有利。