Design and Performance Evaluation of a Novel Double Cyclone

A novel cyclone design, named double cyclone, adds an extra cylinder wall into a conventional reversed ow cyclone.The physical performance of the double cyclone has been experimentally compared to a widely used conventional cyclone by measuring the particle concentrations both upstream and downstream of each cyclone with an Aerosizer.Tests with monodisperse polystyrene latex (PSL) particles with diameters ranging from 0.60 ¹m to 8.8 ¹m have shown that the double cyclone provides higher collection efciency than the conventional cyclone for a tested ow rate range of 10 -40 L/min.In addition, the collection ef ciency difference between the double cyclone and the conventional cyclone becomes even larger as the air ow rate increases.Sharper particle-size separation characteristics were also observed for the double cyclone.Furthermore, it was found that the double cyclone operates at a lower pressure drop than the conventional cyclone at the same normalized cut size.