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

摘要： 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.

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