METHOD AND APPARATUS FOR PROMOTING BIAXIALLY UNIFORM PARTICLE SIZE DISTRIBUTION IN AN AIRSTREAM CONTAINING COAL PARTICLES OF MIXED SIZES

摘要

An apparatus for promoting biaxially uniform distribution of coalparticle size in an airstream supplying combustible mixture to a firebox byway of aheader having a quadrangular arrangement of feed pipes. A conduit or ductwhichreceives the coal air mix, from a bowl mill pulverizer uses first and secondsingle axismixer elements in series, the operating or mixing axes of the two elementsbeingdisposed orthogonal to one another and at right angles to the air flowdirection in thevicinity of the mixer elements. Deflector bars are disposed immediatelyupstream ofthe mixer elements.