环流循环除尘系统分离柱内旋风流场的基本分析

Basic analysis on the gas flow field in separating column of the circumfluent circulation cyclone separator

环流循环除尘系统是旋风分离技术上的一个重要突破,它成功地解决了用旋风分离器高效捕集亚微米粉尘(≤2μ)的问题,同时还具有压降低、操作弹性大等优点。而分离柱作为环流循环除尘系统的主要组成部分,对分离效果起着重要的作用。因此,对分离柱内部流场进行系统的研究十分必要。文章从柱坐标下理想流体的N-S方程和连续性方程出发,对环流循环除尘系统分离柱内旋风流场进行了系统的理论分析,推导出分离柱内理想流体的径向速度、切向速度和轴向速度的基本表达式,并将计算值和试验值进行了比较。研究结果表明,所采用的数学模型和计算公式是可行的。

The circumfluent circulation cyclone separator is an important breakthrough for the cyclone separation technology, which can efficiently collect submicron dusts （ ≤2 μ） with low pressure drop and great turndown ratio. As the key part of the circumfluent circulation cyclone separator, the separating column plays an important role in the separation effect. Consequently, a systematic study on the internal flow field of the separating column is crucial. The cyclone gas flow field in the separating column of the circumfluent circulation cyclone separator was systematically analyzed based on the N-S equation and the continuity equation of the ideal flow under column coordinate, thus deriving basic representations of radial velocity, tangential velocity and axial velocity of the ideal flow in the separating column. The computation values were compared with trial values as well. The result shows that the mathematical model and the computing equations are basically feasible.