摘要
运用欧拉双流体模型,针对循环流化床复合燃烧技术,建立了描述其炉内气固运动特性的三维数学模型,研究分析了CFB复合燃烧技术中不同气相进料位置及不同二次风速度对炉内气固运动特性的影响,结果表明不同的煤层气燃烧器布置位置对颗粒浓度有重要影响,不同二次风速下,煤层气燃烧器布置位置为距布风板2m时,流动状态较稳定,而且能够在悬浮段形成高浓度颗粒流,能使燃料在炉膛整个上升过程中都处于高温燃烧氛围中。
The Euler two-fluid model is established to simulate the gas-particle turbulent flow in a circulating fluidized bed reactor which adopted the technology of complex combustion to retrofit. The model is coded to simulate the threedimensional flow in the CFB, and the affection of the different positions of the secondary feeder and velocities of secondary air is studied and analyzed. It is found that different positions of the secondary feeder is important to particle- concentration. At different velocities of secondary air and the disposed position at 2m, the higher particle-concentration will be formed above the dense phase zone, particles combuste at high temperature.
出处
《现代电力》
2008年第5期48-52,共5页
Modern Electric Power
基金
重庆市经委高新基金项目(05-1GX-QT194)
关键词
气固运动特性
不同进料位置
数值研究
CFB
复合燃烧技术
characteristics of gas-solid flow
different position of feeder
numerical simttlation
CFB
combined combustion
