Patent ID: 7108138
Filing Date: 2006-09-19
Classification: B01D,B04C

Abstract:
1. A material classifier comprising: a) a cyclone including a cyclone inlet, a cyclone outlet, a blower and a blower discharge, the cyclone entraining relatively coarse particles in an exterior downwardly spiraling vortex and entraining relatively finer particles in an interior updraft; b) an air diffuser connected at a diffuser inlet to said cyclone outlet and at a diffuser outlet to an air lock such that said cyclone and air diffuser are in fluid communication; c) wherein said diffuser including a central cylindrical portion including an air inlet means for admitting controlled amounts of diffuser air around substantially the entire cylinder outer periphery of said central cylindrical portion, wherein said diffuser air is admitted into said cyclone in such a manner as to enhance and reinforce the interior updraft such that said material classifier separating fine particles from coarse particles by discharging said fine particles together with air upwardly out said blower discharge, and discharging said coarse particles downwardly through said air lock, such that by varying the amount of diffuser air one controls the size of the fine particles being separated from the coarse particles, and d) further including a secondary cleaning unit mounted on an exit side of the air lock wherein, additional fines and diffuser air is communicated from said secondary cleaning unit to said air diffuser.