摘要
建立含钒页岩焙烧用回转窑的稳态传热数学模型,运用Fluent软件模拟计算等径回转窑内流场和温度分布。在合适位置扩大等径回转窑尾内径,对其窑内流场和温度分布进行模拟计算。在此基础上,分析变径大小和变径位置对窑内温度的影响,得到最优的变径回转窑;然后分析比较等径型与变径型回转窑温度分布特征。结果表明:在相同的工艺条件下,在合适位置变径的变径回转窑焙烧段长度比等径型回转窑的长,有利于提高含钒页岩中各低价态钒的氧化率。
The mathematical model of steady-state heat transfer for rotary kiln（RK） of roasting vanadium-containing shale was established, the flow field and the temperature field for RK with a constant diameter were calculated by Fluent software.The two fields were simulated for RK whose constant diameter was enlarged at the kiln inlet. The influence of size and location of variable diameters on temperature was analyzed based on above results.Then, the optimal RK with variable diameters was gained. Finally, the temperature of RK with a constant diameter was compared with the one with variable diameters. The results show that roasting zone of RK with variable diameters whose diameters change at suitable location is longer than the one with a constant diameter, which is beneficial to the improvement of the oxidation of low valence of vanadium in vanadium-containing shale.
出处
《机械设计》
CSCD
北大核心
2015年第7期101-104,共4页
Journal of Machine Design
基金
"十二五"国家科技支撑计划资助项目(2011BAB05B02)
关键词
变径回转窑
流场
温度场
数值模拟
rotary kiln with variable diameter
flow field
temperature field
numerical simulation
