Particle Classification with Improved Hydro-cyclone Separator

Abstract

Classification performance of hydro-cyclone with adjustable guide plate as well as blow-up and blow-down method has been investigated both experimentally and theoretically. The cyclone has the adjustable inlet guide plate at the inlet, and 50% cut size is controlled from 8.8 to 12.4μm by changing the inlet width ratio of the guide plate from 0.1 to 1. The 50% cut size is successfully controlled from 18.6 to 40μm by the use of guide plate, along with blow-up and blow-down method. In the case of constant liquid flow rate condition, the 50% cut size is reduced by decreasing the inlet width ratio of the guide plate. The experimental results qualitatively agreed with the numerical calculation results based on the direct simulation method. In the case of small inlet width ratio under constant liquid flow rate, the 50% cut size is decreased because the tangential and axial fluid velocity near conical wall increase and a part of fluid entering the dust box rapidly changes its direction to side wall of the dust box.