以填料结构为模型参数的填料塔泛点预测新方法  

New Method in Prediction of Flooding Point in Packed Columns by Incorporating Packing Structure as a Model Parameter

作　　者：方向晨[1] 程振民[1] 穆斌[1] 贾金明[1] 周志明[1] 袁渭康[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室

出　　处：《华东理工大学学报（自然科学版）》2006年第4期370-373,共4页Journal of East China University of Science and Technology

基　　金：中国石化股份有限公司应用开发项目(101019)

摘　　要：根据从双膜理论出发由Bernou lli方程得到的液泛气速与液速之间的函数关系,考察了两个与填料有关的模型参数:一个是由填料比表面积a和床层空隙率ε所组成的填料因子a/3ε,另一个是本文定义的填料结构参数。研究表明:拉西环和球形颗粒属于同一类型,其结构参数确定为1.4;而鲍尔环和矩鞍环属于另一类填料,填料结构参数确定为0.9。由于同时考虑了填料结构和填料因子的作用,因此对液泛的预测更有针对性、更加准确。From the functional relationship between the flooding gas and liquid velocities derived from the two-film theory based on the Bernoulli equation, two parameters which are relative to the packing property were investigated. One is the packing factor a/ε3 which consists of the packing specific area a and the bed porosity ε. Another is the structural parameter which was defined for the first time from this work. It was demonstrated by the present work that Raschig rings and spherical particles were belonging to the same type, and the structural parameter was found to be 1.4, while the Pall rings and Intalox saddles were belonging to a different one, and the structural parameter was 0.9. Since the effects of packing structure and packing factor are considered simultaneously, therefore, the flooding prediction is more indicative and more accurate.

关 键 词：填料塔 液泛 预测模型 填料因子 填料结构 

分 类 号：TQ021.1[化学工程]