摘要
Abstract
Distillation is the most widely used key separation technology in chemical engineering, which has been extensively used in separation process in industry,such as petroleum,chemical engineering,fertilizer,pharmaceutical,environment protection,etc. Distillation possesses extensive application and technical mature,but also faces some disadvantages as huge capital investment and high energy consumption. Thus,it is of significant social-economic meanings to research and develop new as well as high-efficient mass transfer unit and develop new energy-saving distillation technique. The research progress of distillation process is summarized in this article,including types of distillation column,hydraulic performance,mass transfer performance,scale-up,energy saving,process intensification,etc. For hydraulic performance of tray column,the gas-liquid flow situation,pressure drop,weeping and entrainment are introduced. For hydraulic performance of packing column,pressure drop,flooding and holdup are studied. But the current study is still relying on empirical correlation and lack of the rigorous theoretical model. As for the study of gas-liquid mass transfer,the mass-transfer theory is mainly reviewed,but the scientific and accurate model has not been put forward. The study of scale-up includes tray,gas-liquid distributor and support device. The process energy-saving and intensification technology is reviewed,including process- coupling,process energy-saving,recovery of low grade waste heat,special distillation. Finally,the prospects of mass-transfer,process intensification and development direction of process integration are proposed.关键词
精馏/过程节能/过程强化/流体力学/传质Key words
distillation/process energy saving/process intensification/hydraulics/mass transfer分类
化学化工
