摘要 |
<p>A rotatable throat (69) for a coal pulverizer (50) is improved by creating a high pressure drop in the air ports (35) which surround the throat. The lower portions of the air port nozzles are made of vanes (18) and relatively thin sides (16, 17), an shaped to provide air entrance areas (34) from five to six times the release points (36) of the nozzles.</p> |