COAL PULVERIZATION SYSTEM Russian patent published in 1997 - IPC

FIELD: heat-power engineering. SUBSTANCE: system includes dust concentrator 6 mounted coaxially relative to burner 9. Dust is concentrated at walls of its housing due to tangential supply of aero-mixture from mill 1. Dust concentrator 6 is also used for heat treatment of dust before burning due to burning of part of fine dust in axial jet escaping from nozzle 15 which is just thick-walled muffle. Concentrated dust dried at walls of housing is sucked by mill fan 16 through axial branch pipe 14 through which nozzle 15 is introduced inside hollow insert 11 through fairing 12. EFFECT: stable firing up of boiler and effective combustion at varying loads during operation on low-grade coals. 1 dwg