In order to give consideration to both the high separation accuracy and large processing capacity

the parallel configuration of mini-cyclones is being used more and more. The influences of the spiral channel on the separation performance of the gas cyclones were investigated and the classification capacity and influences on particle distribution of the spiral channel were analyzed by discrete phase model (DPM) and classification experiments. The results showed that the large particles were inclined to discharge from the former outlets of the spiral channel and then enter the cyclones successively. The discharged particles presented different size distributions in every outlets

which contribute to the classification. The spiral channel made influences on the fine particles to force them enter the cyclone with a state that the finer particles are close to the outside wall

and the concentration of internal section is higher than that of the external one. The particle rings formed by the large particles promoted the separation of fine particles

thereby increasing the separation efficiency of the cyclone. The experiment further verified the classification capacity and influences on particle distribution of spiral channel. The results could provide directive significance to the parallel configuration of mini-cyclones.