Effects of Sintered‐Metal Cone Length on Gas‐Cyclone Classification Performance

Abstract

The gas cyclone is a classic flow device commonly used in the separation of particles from a gaseous flow stream. The gas-cyclone classification performance is affected by the length of the porous sintered-metal cone. Three different lengths of porous sintered-metal cones were tested to evaluate the classification performance of a gas cyclone. Clean air was fed into the cyclone through the cone. The cone's particle cut size depended on the amount of clean air injected into the cone. In medium and long cones, a very small amount of injected clean air reduced the particle cut size, whereas in short cones, the cut size remained approximately constant and was greater than that for the traditional acrylic resin cone. In all cases, clean-air injection reduced the powder deposition to values lower than those for acrylic resin cones. The results provide application-based guidelines for the design and usage of sintered-metal cones.

A Probabilistic‐Statistical Model of the Particle Classification Process in Small Hydrocyclone Classifiers

“…At the same time, the implementation of this apparatus is constrained because there are no universal calculation procedures and the general theory of transfer processes in hydrocyclone classifiers is incomplete. The abovementioned circumstances are related to the complex behavior of dispersed particles in hydrocyclones , , especially in the field of the finest fractions, where random forces can have a defining value . It is currently impossible to describe it quantitatively by using only deterministic methods , .…”

Asymptotic Properties of a Probabilistic‐Statistical Model of Particle Classification in Hydrocyclones

“…Relation (11) not only establishes the correlation between coefficients c and k, characterizing the intensity of centrifugal forces and the classification effect, but also shows that the position of the mode abscissa x m,n as well as the position of mode abscissa x m in distribution (6) in the space of the dimensionless coordinate x do not depend on the intensity of random perturbations b.…”

“…Obviously, under statistic equilibrium conditions with J ¼ 0, the distribution (9) coincides with the distribution (6).…”

“…From the practical perspective, the relation (7) is quite useful, as in the space of dimensionless coordinate x it not only establishes the correlation between the coefficients c and k, which characterize the intensity of centrifugal forces and the classification impact, but also gives their correlation a visual physical significance. Moreover, the relation (7) leads to the conclusion that the position of mode abscissa x m of distribution (6) in the space of the dimensionless coordinate x does not depend on the intensity of random perturbations b.…”

“…Among them, the classification of systems with aqueous dispersion medium is especially important [1‐3]. Up‐to‐date technical demands address the problem of classification of fine fractions in aqueous suspensions , , .…”