卧式分离器出口结构数值优化分析  

Numerical study on optimization of exit configuration of horizontal cyclone

作　　者：张知翔[1] 王海超[1] 赵钦新[1] 温龙[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《华北电力大学学报（自然科学版）》2010年第5期68-72,97,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家863计划"大型干法水泥线纯低温余热发电双压技术"资助项目(2007AA05Z251)

摘　　要：基于FLUENT平台,利用RSM模型,对某台116 MW无夹廊角管式循环流化床锅炉卧式分离器的出口结构进行优化设计,在优化的基础上研究了入口风速对分离效率的影响。模拟分析表明:承灰斗与旋风筒两边都相切、料腿内设三个隔板、承灰斗相对出口宽度a/D=0.143、承灰斗相对高度b/D=0.238的出口结构分离效率最高。分离效率随入口风速的提高而提高,当U>15 m/s时,d50<26μm。The numerical study on optimization of exit configuration of horizontal cyclone of a 116MW corner-tube circulating fluidized bed boiler,relation between collection efficiency and inlet velocity of cyclone are performed with FLUENT using RSM model..The result shows that the collection efficiency of horizontal cyclone will be the highest when the geometry parameters of ash access chamber a/Dand b/D being 0.143 and 0.238 separately,and the side walls tangent with cyclone.Meanwhile there should be three partition boards in standpipe.The higher the gas inlet velocity is,the higher the collection efficiency will be.While U〉15 m/s,d50〈26 μm.

关 键 词：卧式分离器 出口结构 优化设计 分离效率 数值模拟 

分 类 号：TK123[动力工程及工程热物理—工程热物理]