METHOD OF BURNING SOLID PULVERIZED COAL FUEL IN FURNACES OF STEAM AND HOT-WATER BOILERS (VERSIONS) Russian patent published in 2003 - IPC

FIELD: power engineering; heating system units; boiler furnaces. SUBSTANCE: proposed method includes forming of air flow, air-and- fuel mixture flow, firing up the mixture and burning it in furnace; at initial stage of burning-out of light components and dust of fuel, air-to-fuel ratio corresponding to excessive air coefficient relative to light components α_l>1, and relative to entire amount of fuel α_f = 0,2...0,8 is ensured; in the course of burning-out of carbon of fuel, air is added to mixture so that excessive air coefficient α_f reaches magnitude α_f≥1. by the moment of complete burning-out of carbon. According to one version, air is added to mixture in such amount that excessive air coefficient gets equal to α_f = 0,5...0,8 at 50-% burning-out of carbon and reaches α_l>1, at further burning-out of carbon by the moment of complete burning-out of carbon. EFFECT: enhanced efficiency and reliability. 3 cl, 3 dwg