Abstract:

Distillation is one of important chemical separation processes. The scale-up of critical equipment is required by modern distillation technology. Many difficulties，such as liquid-level gradient，fluid distribution，deformation of column internals and long period operation，greatly affect the scaling of tower. To solve these problems，computational fluid dynamics（CFD），mechanical analysis and process simulation technology，theoretical and technical research of column enlarging have been used by Tianjin University，and the design and manufacture of large-scale distillation equipment are improved and successfully used in the ten million tons refinery and million tons ethylene project with good economic and social benefits. The key technologies on tower large scaling and their application are introduced in this paper by the description of an industrial case（8 millions t/a vacuum distillation column）.