Design and performance evaluation of a novel double cyclone

Abstract

A novel cyclone design, named double cyclone, adds an extra cylinder wall into a conventional reversed flow 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 μm to 8.8 μm have shown that the double cyclone provides higher collection efficiency than the conventional cyclone for a tested flow rate range of 10-40 L/min. In addition, the collection efficiency difference between the double cyclone and the conventional cyclone becomes even larger as the airflow 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.