METHOD AND CYCLONE PRECOMBUSTION CHAMBER OF BOILER FOR BURNING PULVERIZED FUEL Russian patent published in 1999 - IPC

FIELD: low- temperature combustion of pulverized fuels of all kinds in power and industrial boilers. SUBSTANCE: furnace gases are cooled down in afterburner 3 and temperature in cyclone precombustion chamber is maintained at level not exceeding starting point of ash softening; ash and coke fragments are confined within gasification chamber. EFFECT: reduced emission of sulfur and nitrogen oxides, reduced size of furnace and boiler, improved reliability and serviceability of precombustion chamber. 3 cl, 1 dwg