回料流入口高度对循环流化床提升管流动特性的影响

作     者：孙绍增 王正阳 杜明坤 邓启刚 吴少华 SUN Shaozeng;WANG Zhengyang;DU Mingkun;DENG Qigang;WU Shaohua

作者机构：哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150001 哈尔滨工业大学土木工程学科博士后流动站黑龙江哈尔滨150001 

出 版 物：《化工学报》 (CIESC Journal)

年 卷 期：2010年第61卷第1期

页      面：60-65页

核心收录：

学科分类：080706[工学-化工过程机械] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：国家科技支撑计划子课题项目(2006BAA03B01-07)~~ 

主　　题：循环流化床 回料气固两相流 入口高度 颗粒浓度分布 回料风的扩散 

摘      要：The axial pressure drop profile and the radial solids distribution were measured in a circulating fluidized bed for evaluating the effects of return gas-solids stream position on the riser flow *** saturation carrying capacity of gas for Geldart B typed particles and the flow mode of return gas-solids stream in the bed were *** was found that arranging the inlet at a higher position of the riser would make the bottom bed leaner when U0 was high and Gs was *** Gs increased,the longer influenced region of return particles and a small air-staging through lifting the loosening air injection position made the bottom bed become denser *** deceleration and residence of return particles caused a relatively denser but asymmetrical region in the vicinity of *** much more symmetrical solids distribution profile was found in the upper and lower regions far away from the *** effects of inlet height on the flow properties of the riser with air-staging also were *** secondary air injection below the solids inlet could not cut off the solids exchange in the *** bed solids concentration increased when the particles inlet moved to a higher position of the bed when air-staging was *** CO2 as tracer,the dispersion of the loop-seal-fluidizing air for transmitting the return particles was *** was found that the loop-seal fluidizing air dispersion rate was low but can be enhanced by the secondary air injection.