摘要
为了研究径向松动风对循环立管气固两相流动的影响,在长4500 mm、直径56 mm的循环立管中测量压力梯度、颗粒流率、立管总压差、轴向松动风量和径向松动风量的关系,根据压力梯度与物料浓度的关系确定循环立管的流态.计算结果表明,径向松动风可以有效增强循环立管粘滑流动流态,即工作流态的稳定性;径向松动风可以有效增加循环立管临界颗粒流率,但颗粒流率较低时,过大的松动风往往会降低立管颗粒流率.
In order m study the influence of radial aeration air on the gas-solid flow in standpipe, the pressure gradient, particle flow rate, total pressure difference, axial and radial aeration air flow were measured in the standpipe with a length of 4 500 mm and a diameter of 56 mm. The flow pattern in the standpipe was determined by the pressure gradient and particle concentration. The calculation result shows that the radial aeration air can enhance the stability of stick-slip flow pattern in the standpipe. The radial aeration air can effectively increase the critical particle flow rate in the standpipe. However, when the particle flow rate is lower, the strong aeration air always reduces the particle flow rate in the standpipe.
出处
《沈阳工业大学学报》
EI
CAS
2009年第2期135-138,共4页
Journal of Shenyang University of Technology
基金
辽宁省教育厅一般资助项目(20060592)
沈阳工程学院重点资助项目(060244)
关键词
循环立管
径向松动风
临界颗粒流率
粘滑流动
流态
standpipe
radial aeration air
critical particle flow rate
stick-slip
flow pattern
