Fine Particle Classification with Revised Cyclone

摘要

Experimental and numerical studies have been conducted about the cut sizecontrol with revised dry cyclone. New type of dry cyclone with the apex conewhich is covered with special shaped ring indicated cut size movement from 2to 40μm. By use of the apex cone at the inlet of dust box, it is possible todecrease the fluid velocity component in the dust box and to reduce there-entrainment of particles from the dust box. The cut size indicated the minimumvalue for the specific height of the apex cone. The optimum apex cone heightchanges to the lower position as the cyclone inlet velocity increases.Classification performance of revised cyclone by use of additional fluid ina upper cylindrical part were also examined. By selecting a suitable part ofadditional flow position, it is possible to reduce the cut size with the increaseof additional flow rate. The 50% cut size becomes about 0.5μm by use of theinlet guide plate and additional flow. Three dimensional numerical simulationwere also conducted and compared with the experimental data.