刮膜式分子蒸馏技术理论研究进展  

Process in theoretical research on wiped molecular distillation technology

作　　者：段振亚[1] 刘茂睿 李韶璞 王臣 张俊梅[2] 李镇江[1] 刘永生 

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061 [2]青岛科技大学化工学院,山东青岛266061 [3]威海汇鑫化工机械有限公司,山东威海264200

出　　处：《化学工程》2017年第9期13-17,51,共6页Chemical Engineering(China)

基　　金：威海市科技发展计划项目(2016GGX022);泰山学者工程专项经费资助项目

摘　　要：由于实际生产中真空度高且影响因素多,迄今为止有关分子蒸馏的基础理论尚不完善,其工艺及设备结构设计仍主要依靠于经验和实验数据确定,制约了其实现大规模的工业化应用。文中主要从蒸发表面的液体成膜、液膜在加热表面的蒸发过程、气相蒸发分子运动过程以及冷凝面上的气体分子冷凝过程4个方面,综述了国内外学者对分子蒸馏过程的机理研究进展,重点对近年来快速发展的刮膜式分子蒸馏技术进行了详细介绍。在此基础上,提出了未来分子蒸馏技术亟待解决的关键问题,认为高真空条件下的分子流运动行为的研究可揭示工业生产中分子蒸馏的分离原理。So far, the imperfection of the molecular distillation basic theory due to the high vacuum degree and other influencing factors makes the molecular distillation equipment design still rely on design experience and experimental data, thus, this restricts molecular distillation technology＇s large-scale industrial application. The wiped molecular distillation technology with rapid development recently was introduced, and the research progress of process mechanism of the wiped film molecular distillation carried on by scholars at home and abroad was summarized from four aspects, such as evaporation of the liquid film on the surface, evaporation process of the liquid film on the heating surface, motor process of the gas phase evaporation molecules and condensation process of gas molecules on condensing surface. On this basis, some key problems about molecular distillation technology that need to be solved were proposed, and the study of molecular flow under high vacuum was pointed out that could reveal the separation mechanism of molecular distillation in industrial production.

关 键 词：分子蒸馏 刮膜 基础理论 展望 

分 类 号：TQ028.31[化学工程]