化工进展2016，Vol.35Issue(9)：2685-2692,8.DOI:10.16085/j.issn.1000-6613.2016.09.008
刮膜式分子蒸馏器传热特性及壁面优化
Characteristics of heat transfer and wall optimization in the wiped film molecular distiller
摘要
Abstract
In this paper,a two phase flow of di-(ethylhexyl)-phthalate and di-(ethylhexyl)-sebacate (EHP-EHS) mixture with a three dimensional model was simulated by CFD software with UDF,by which the heat transfer characteristics of wiped molecular distillation process was studied with full developed temperature and flow field. The results showed that the change of film surface temperature is periodic and waved. With faster rotor speed,the period is shorter,the number of fluctuations is bigger and the film surface temperature is more stable. The Nu number increases sharply where the wiper wipes and the wiped wiper effect is the main factor influencing the increase of averageNu number. With the optimization of the evaporating cylinder,the liquid turbulence increases. The average Nu number of rectangular arrangement,triangular arrangement and the spiral arrangement of fins on the evaporating cylinder are 1.32,1.23 and 1.04 times as large as the smooth one,respectively,which provide a reference for further optimization of wiped film molecular distiller.关键词
刮膜式分子蒸馏/计算流体力学/传热/壁面优化Key words
wiped molecular distiller/computational fluid dynamics(CFD)/heat transfer/wall structure optimization分类
化学化工引用本文复制引用
邓立文,许松林..刮膜式分子蒸馏器传热特性及壁面优化[J].化工进展,2016,35(9):2685-2692,8.基金项目
国家自然科学基金项目（21176170）。 （）
