关键词: 薄膜式蒸发器;分离效率;相变平衡;蒸馏技术;废水处理

Abstract: The recovery of contaminants and useful substances from liquid wastes, the purification of
production effluents and the separation of thermally instable mixtures are some of the
multivarious applications of thin-film distillors in many processes of the chemical and
allied industries and of the food industries. In a study carried out in pilot plants with
distillation test systems there was found a good agreement between the experimental
separation results and those obtained by computing with a theorectical model; the latter is
based on the assumption of phase equilibrium between the vapour formed on an infinitely
small element of area in a liquid film of any given concentric periphery of the vertically
arranged evaporator. These tests were perfomed under various phase loads.

Key words: phase equilibrium, thin-film distillation, scaling up, distillation energy