Improvement of gas-cyclone performance by use of local fluid flow control method

The purpose of this paper is to study the effects of a secondary flow injection method on sub-micron particle separation in a new type of gas-cyclone. It was found that particle collection efficiency and classification accuracy of the improved type cyclone was higher than that of the original type cyclone. Three-dimensional simulation results of the improved type cyclone indicated increased fluid rotational velocity in the cylindrical part and increased downward velocity in the conical part compared to the original type cyclone. Experimental results qualitatively agree with the numerical simulation. In order to improve high particle separation performance of gas-cyclones, it is recommended to use both the secondary flow injection and inlet guide plate methods.

Graphical AbstractThe purpose of this paper is to study the effects of a secondary flow injection method on sub-micron particle separation in a new type of gas-cyclone. Particle classification performances of newly developed gas-cyclones (Type A and B) were examined by experimental and simulation studies. It was found that particle collection efficiency and classification accuracy of the type B cyclone was higher than that of the type A cyclone. The reason for this is due to the increased rotational fluid velocity in the cylindrical part and increased downward velocity in the conical part for the type B cyclone.Figure optionsDownload as PowerPoint slide