无抄板间热式滚筒干燥机传热研究  

Modeling of heat transfer in indirect rotary dryer that without flights

作　　者：车耀坤[1] 屈一新[1] 王水[1] 周鑫[2] 张少辉[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国纺织工业设计院,北京100037

出　　处：《北京化工大学学报（自然科学版）》2010年第5期1-4,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：对流传热系数α是间接加热式滚筒干燥机设计中的重要参数。通过因次分析建立了无抄板间热式滚筒干燥机对流传热系数α与干燥机操作条件间关系的模型,并进一步分析了模型中各个影响因素对对流传热系数α影响。结果表明:无抄板间接加热式滚筒干燥机的对流传热系数α随干燥机内物料流动速度(D.n)、湿分组成x1、物料振实密度ρbt和有效黏度η的增大而增大,随干燥机特征尺寸δ和物料比热λ的增大而减小。The convective heat-transfer coefficient α is one of the important parameters in the design of an indirect rotary dryer.A model that correlates α with several process parameters for an indirect rotary dryer without flights has been developed through dimensional analysis.According to the model,α increases with the product of the drum diameter D and rotation speed n,the moisture content x1,the tap density of the mixture ρbt and the virtual viscosity η;α decreases with the qualitative length of the dryer δ and the specific heat of the mixture λ.

关 键 词：滚筒干燥机 对流传热系数 因次分析 

分 类 号：TQ051.8[化学工程]