An Experimental Study on Gravity Blending Silo with an Inner Downcomer

A novel gravity blender with an inner downcomer was experimentally studied in this work.The flowcharacteristics of solid through the downcomer with branch pipes and the influence of the number of intake openingsand their axial position along the downcomer on blending efficiency were investigated.The results of tracer experi-ments show that better blending quality can be obtained if the intake openings along the downcomer are designatedaccording to the equal time interval principle.More intake openings are beneficial for blending efficiency,and theso1ids fiow rate through the branch pipes along the downcomer can be predicted by the Beverloo equation.