Evaluation of static pressure drops and PM10 and TSP emissions for modified 1D-3D cyclones

Five modifications of a standard 1D3D cyclone were tested and compared agai nst the standard 1D3D design in the areas of particulate emissions and stat ic pressure drop across the cyclone. The modifications to the 1D3D design i ncluded a 2D2D inlet, a 2D2D air outlet, a D/3 trash exit, art expansion ch amber with a D/3 trash exit and a tapered air outlet duct. The 1D3D modific ations that exhibited a significant improvement in reducing both PM10 and t otal suspended particulate (TSP) emissions were the designs with the 2D2D i nlet and air exhaust combined with either the conical D/3 tail cone or the expansion chamber. In reference to the standard 1D3D cyclone, the average r eduction in PM10 emissions was 24 to 29% with a 29 to 35% reduction observe d in TSP emissions. The modifications with the tapered air outlets did not show any significant improvements in controlling PM10 emissions. However th e modification with the tapered air outlet/expansion chamber combination ex hibited statistical significance in reducing TSP emissions by 18% compared to the 1D3D cyclone. All modifications tested exhibited lower static pressu re drops than the standard 1D3D.