循环流化床换热管束的防磨措施——加翅防磨法防磨性能的研究  

AN INVESTIGATION OF THE FIN-TUBE EROSION-PROTECTION METHOD IN THE CIRCULATING FLUIDIZED BEDS

作　　者：樊建人[1] 周大冬 岑可法[1] 

机构地区：[1]浙江大学

出　　处：《化学反应工程与工艺》1990年第4期37-44,共8页Chemical Reaction Engineering and Technology

基　　金：首次浙江省自然科学基金

摘　　要：本文对循环流化床换热管束的磨损及防磨措施——加翅防磨法作了实验研究和数值计算。研究结果表明,加翅防磨法是一种简单实用的有效防磨措施。Erosion of tubes by coal particles or coal ash impingement has caused serious problems to many pulverized coal energy conversion systems(such as the circulating fluidized bed combustion system).The present paper presents the numerical and experimental investigations of a new type erosion-protection method——finned tube erosion-protection method.The experimental investiga- tion was made by placing the erosion-prone wax cylinders with fins in a bench-scale cold circulating fluidized bed to simulate the long term erosion effect.Numerical study was conducted for the folw of a dilute particle-laden gas moving past finned tube undergoing erosion.The results from this study showed that the finned tube is a simple and efficient erosion-protection method in most indus- trial two-phase systems where erosion occurs.The fin relative height,the fin number and the angle between two adjacent fins are three important parameters which affect the finned tubes erosion-pro- tection abilities.

关 键 词：循环流化床 加翅防磨法 换热管束 

分 类 号：TQ051.13[化学工程]