【作者】 孔行健； 孙国刚； 魏伟胜； 马志明；

【Author】 KONG Xing-jian, SUN Guo-gang, WEI Wei-Sheng, MA Zhi-ming (Process Equipment Laboratory, State Key Laboratory of Heavy oil Processing, Petroleum University of China, Beijing 102249, China)

【机构】 中国石油大学(北京)过程与装备实验室重质油加工国家重点实验室；

【摘要】 本文通过鼓泡床条件下进行冷颗粒加入热床层的换热实验,对进料口、布风板附近等处的传热特性进行了分析．结果表明:密相区热交换范围随着床层与冷物料温差的增大而迅速减少;相同温度、气量条件下Nu准数变化随着载料量的增大而减少;工况背景的不同会造成换热强度即局部的反应条件的波动;床层温度高时冷颗粒加入后Nu 准数变化时间短且变化幅度大．更多还原

【Abstract】 In this paper, an experimental investigation on heat transfer characteristics is done at different temperature particles in bubbling fluidization. And the local heat transfer characters such as intake port, air ventilation and board secondary air gates are analysed. The results show that temperature difference, operation status and material loading have important influences on heat transfer region, thermal intensity and Nusset number.更多还原