化工学报2012，Vol.63Issue(10)：3101-3111,11.DOI:10.3969/j.issn.0438-1157.2012.10.014
颗粒级配对分级机进料管流动特性影响的数值研究
Effect of particle gradation on flow field of feeding pipe in classifier
摘要
Abstract
In order to investigate the effect of particle gradation on the flow field of the feeding pipe in a classifier, the computational fluid dynamics method was applied in the study of gas-solids two-phase flow field in the feeding pipe. After the model was verified, the effects of gas velocity, feeding concentration, particle gradation and density on the pressure difference of inlet and outlet, particle concentration distribution and dispersion were analyzed. The results showed that the pressure difference of inlet and outlet increased with increasing large size particle content of gradation. When gradation was with a high content of small size particle, concentration distribution was uniform and particle dispersion was good. The change of gas velocity, feeding concentration and particle density had less influence on particle dimensionless concentration distribution and dispersion. The operation parameters had significant effects on gradation with a high content of large size particle. With the increase of gas velocity, particle dimensionless concentration decreased, concentration non-uniformity decreased, and particle dispersion became better. With the increase of feeding concentration, concentration non-uniformity increased, and particle dispersion became worse. With the increase of particle density, concentration non-uniformity decreased, and particle dispersion became better. The dividing line between high and low dimensionless average concentration in the vertical section of the axial feeding pipe was Z=0. 5 m, and it basically unchanged with the change of particle gradation and operation parameters.关键词
超细分级机/气固两相流/颗粒级配/量纲1浓度/颗粒分散Key words
superfine classifier/ gas-solid two-phase flow/ particle gradation/ dimensionless concentration/ particle dispersion分类
矿业与冶金引用本文复制引用
刁雄,李双跃,黄鹏,任曦皞..颗粒级配对分级机进料管流动特性影响的数值研究[J].化工学报,2012,63(10):3101-3111,11.基金项目
国家科技支撑计划项目(2011BAA04B04) （2011BAA04B04）
国家科技计划项目(09C2621502330) （09C2621502330）
西南科技大学研究生创新基金项目(11ycjj30,12ycjj41). （11ycjj30,12ycjj41）
