The purpose of this study is to improve particle separation performance by use of the modified type dry-cyclone. By use of the apex cone at the inlet of dust box, it is possible to decrease the fluid velocity component in the dust box and to reduce the re-entrainment of particles from the dust box.
It is found that the optimum apex cone angle is 70 deg. The particle collection efficiency is improved by use of the additional flow injection near the upper plate and inlet guide plate. It is also newly found that the intake of free air at the cyclone inlet part increases particle separation efficienrcy under low pressure drop condition.
