径向粗粉分离器数值模拟研究  

Numerical Simulation of Radial Coarse Powder Classifier

作　　者：王勇 吴立新 石战胜 李宗慧 马治安 WANG Yong;WU Lixin;SHI Zhansheng;LI Zonghui;MA Zhian(Hunan Huadian Changsha Power Generation Co.,Ltd.,Changsha 410005,China;Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou310030,China)

机构地区：[1]湖南华电长沙发电有限公司,湖南长沙410005 [2]华电电力科学研究院,浙江杭州310030

出　　处：《湖南电力》2021年第2期20-23,31,共5页Hunan Electric Power

基　　金：中国华电集团科技项目(NO.CHDKJ17-01-07)。

摘　　要：为了探索径向粗粉分离器的优缺点,利用基于离散相模型(DPM)框架的计算流体力学(CFD)预测径向粗粉分离器内流场、速度变化、压力变化及颗粒流线等流体力学特征,结果显示粗粉有外壁区、内锥外侧区和内壁内侧区等三个分离区,内锥体和外壳易磨损,易形成颗粒二次携带,中心筒内易形成漩涡,出口粉管浓度偏差大等。最后提出了在进口上端增加撞击锥、进口内增加旋流装置等改进措施。In order to search the advantages and disadvantages of radial coal classifier,a computational fluid dynamics(CFD)simulation within the discrete phase model(DPM)framework is carried out to investigate the hydrodynamic characters such as flow field,axial and magnitude velocity,pressure drop,particle streamline and so on.The results show that the coarse powder has three separated areas such as the inner side of outer wall,the outer side of inner cone and the inner side of inner wall.The inner cone and the outer shell are easily worn,the particles are easily carried again,the vortex is easily formed in the center tube,and the deviation about coal powder concentration between the two exit tubes is large.The improvement measures such as adding the bump cone on the top of the inlet and introducing the centrifugal block in the inlet are proposed in the paper.

关 键 词：粗粉分离器 离心分离 径向 撞击 数值模拟 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]