Attached
Enhancement of fine particle (PM2.5) separation is important for cyclone separators to reduce any extra
purification process required at the outlet Therefore, the present experimental research was performed
to explore the performance of cyclone separators modified with down-comer tubes at solid loading rates
from 0 to 8.0 g/m3 with a 10 m/s inlet velocity. The study proved the effectiveness of down-comer tubes
in reducing the particle re-entrainment and increasing the finer separation with acceptable pressure
drops, which was pronounced at low solid loading conditions. The experimental results were compared
with theories of Smolik and Muschelknautz. Theories were acceptable for certain ranges, and theory
breakdown was mainly due to the neglect of particle agglomeration, re-entrainment and the reduction
of swirling energy, as well as the increase of wall friction due to presence of particles
