M Model Of Low-density Materials Cyclone Separation Performance

As important gas-solid separation equipment, due to the advantages such as simple structure, easy maintenance, low cost, high temperature resistant and high pressure resistant, cyclone separator is applied in wide range areas of petroleum, chemical, metallurgical,environmental protection and many other fields, and the research of which is attracting increasing attention.The main works are that cyclone separator for the low density of material production is calculated with Muschelknautz model (M-model), and its structure size, cut size and total pressure drop are obtained. At the same time numerically simulation is carried on for separator through computer's fluid software FLUENT. The simulation research is deal with that influence of change in pressure, velocity and density change for eddy current characteristics and separation efficiency by pure gas phase flow field and gas-solid two-phase flow field. Thus it is shown that The motion characteristics of gas phase flow field of the cyclone separator inner is double hydro-cyclone mainly, where outer part rotate downward, center layer upward and rotation direction is same; Cyclone separator's swirl with instability result in vortex core tail or ends attached at separator bottom wall and swings, causes reflux of mixing phenomenon, and causes scale formation; Cyclone separator's static pressure, speed of each direction and separation efficiency of solid particle increases with increase of handled gas. Flow with is swirling along the wall downward, pressure of the outer part is high, the pressure of center is low, the solid particles are concentrated distribution in the middle wall section mainly; With increase of particle concentration in gas, separating efficiency increase gradually. While the concentration increases to a certain amount that is a threshold, separation efficiency of particle wouldn't increase again, and come to stability; Predicted result of M-model is approaching to numerical simulation result, which demonstrates the forecast for low density of material cyclone separator with M-model has good accuracy.This article provides new ideas for application and research of low density material cyclone separator with M-model. At the same time, numerical simulation study is carried on for cyclone separator, thus characteristic of separator internal flow field is known, and there is important engineering application value for structure optimizing of the separator, shorten research and development cycle.