振动流化床内污泥颗粒与内置水平管的局部传热特性研究  

Local heat transfer characteristic between sludge particles and inner-horizontal tubes in vibrating fluidized bed

作　　者：范辞冬[1] 叶世超[1] 王锐思[1] 祝杰[1] 齐亚兵[1] 吴振元[1] 吴明钟[1] 

机构地区：[1]四川大学化工学院,四川成都610065

出　　处：《现代化工》2010年第5期77-79,81,共4页Modern Chemical Industry

摘　　要：研究了污泥颗粒在振动流化床中与浸没水平管的传热规律,考察了流化气速、振动频率和振幅对局部传热系数的影响,实验结果表明,局部传热系数因水平管圆周位置而异,局部传热系数随着气速、振动频率和振幅的增加呈先增长后降低的趋势。水平管的迎风面的局部传热系数要远远小于背风面。研究结果能为污泥在内置水平管的振动流化床的干燥设计提供理论依据。The heat transfer characteristic of sludge particles with inner-horizontal tubes in vibration fluidized bed is studied. The influenceing factors on local heat transfer coefficient such as gas velocity, vibration frequency and vibration amplitude are researched. The results show that the local heat transfer coefficient varies in different position of tube circle,it increases firstly and then decreases with the increasing of gas velocity, vibration frequency and vibration amplitude. Local heat transfer coefficient on windward side is much less than that of leeward side. The research can provide theoretical bases for sludge drying in vibration fluidized bed with inner-horizontal tubes.

关 键 词：污泥颗粒 内置水平管 振动流化床 局部传热系数 

分 类 号：TQ021.3[化学工程] TQ051.1