Experimental study on the size segregation of binary particles in a moving granular bed

Abstract

The moving granular filter technology based on size segregation is a promising technology for hot gas cleanup. A moving granular bed that can separate a mixture of particles spontaneously and replace the particles continuously layer by layer was design in this work. We experimentally studied the effects of free slope length (L), particle replacement rate (Q), and inlet large particle mass fraction (α) on the degree of size segregation. Results showed that the degree of size segregation increased with an increase in L and decreased with an increase in α. Q exerted little effect on size segregation. The control of the layer thickness and flow velocity of the particles after segregation was achieved by changing α and the angle of the movable plate (θ). We also captured the size segregation process of the particles with a camera and analyzed the influence mechanisms of L, Q, and α on size segregation.