旋风分离器平衡尘粒模型

An Equilibrium Model of Dust Particles in Cyclone Separators

以往旋风分离器中平衡尘粒的确定仅考虑涡汇两维气流作用，未注意轴向气流作用的影响。该文分析涡、汇、升降流三维气流场及其气流对尘粒的作用，认为平衡上杜分布在轴向速度为零的锥形空间面上。由实验和理论分析可知：距芯管进口截面越远，平衡粒径就越小。文中给出了平衡尘粒径的理论计算公式，并以两种旋风分离器为例，计算了平衡生粒的分布。图１表２参６。

Abstract Existing cyclone separators are designed by only supposing a two dimensional circulating and sink flow in deriving the equilibrium condition of dust particles,while the influence of the axial component is being neglected. The paper presents an analysis of the 3-dimensional flow field, including the circulating, the sink and the axial flow components, and their influence on the dust particles, and expresses the opinion that the dust particles in equilibrium are distributed on a conical spacial surface where the axial velocity is zero. From lab experiments and by theoretical analysis it may be concluded that: The farther away a particle is from the central tube's entrance section, the less is its equilibrium state diameter. The paper gives a theoretical formula for calculating the diameter of particles in equilibrium and also the calculated distribution of particles in equilibrium for two kinds of cyclone separators taken as examples.