硅酸盐学报Issue(11)：1527-1533,7.DOI:10.7521/j.issn.0454-5648.2013.11.11
回转窑冷态射流和气固两相流数学计算
Calculation of Cold Jet and Gas-solid Two Phase Flow in Rotary Kiln
摘要
Abstract
The flow rule and coal particles movement characteristics of cold jet and gas-solid two phase flow in rotary kiln were ana-lyzed by using a numerical method. The effect of each duct air supply parameter of four-channel burner on the strength of mixed size, backflow and whirl was investigated, and the numerical method was verifiedvia a single-phase cold model. The discrete phase parti-cle track model was added to the single-phase cold model to analyze the gas movement characteristics and particle distributions when a pulverized coal was injected into the gas phase turbulent flow field. The results show that the center air duct has an effect on the formation of central backflow. It was indicated that a jet with speed difference produced from both the internal rotational wind and direct wind could promote the entrainment and backflow of the high temperature secondary air and profited pulverized coal combus-tion under gravity. The coarser the coal particle size, the greater the pulverized coal deposited at the bottom of the kiln could be. The distribution was more uniform at the particle size of 30μm.关键词
冷态射流/四通道煤粉燃烧器/颗粒轨道模型/数值模拟Key words
cold jet/four-channel pulverized coal burner/particle-trajectory model/numerical simulation分类
化学化工引用本文复制引用
尹洪超,沈春艳,刘红,李德付..回转窑冷态射流和气固两相流数学计算[J].硅酸盐学报,2013,(11):1527-1533,7.基金项目
国家自然科学基金项目(51176021)。 （51176021）
