关键词: 分子蒸馏, 蒸馏原理, 蒸馏设备, 影响因素, 重油分离, 废润滑油回收, 热敏性, 平均自由程

Abstract:

Molecular distillation, as a low carbon and environmental protection emerging separation technology, shows unique advantages in the separation process of high boiling point and heat sensitive substances, and is in an active period of development and utilization at domestic and international. The article systematically introduces the separation principle, separation process, influencing factors, etc. of molecular distillation technology, and summarizes and compares the advantages and disadvantages of molecular distillation itself and the advantages and disadvantages of different distillation equipment. Its applications in petrochemical industry such as oil separation, oil analysis and waste oil recovery are compared. At the same time, it is pointed out that the basic theoretical research of molecular distillation technology is insufficient at the present stage, especially in the establishment of hydrodynamics, mass and heat transfer mathematical simulation model of reaction process, and suggestions for expanding the scale of industrial application are put forward.

Key words: molecular distillation, distillation principle, distillation equipment, influence factor, heavy oil separation, waste lubricating oil recovery, heat-sensitive, mean free path