FURNACE Russian patent published in 1998 - IPC

FIELD: combustion of various kinds of fuel in power boilers. SUBSTANCE: furnace has vertical prismatic combustion chamber 1 with sloping bottom 2 under it, and vertical wall 3 of chamber 1 mounts pulverized-fuel burners 4 with reactive fuel admission devices 5 inclined downward, as well as reactive fuel burners 6 installed lower and in horizontal position; opposite wall 7 carries air nozzles 8 and below them, combined nozzles 9 inclined upward and used to admit at least one of following agents into furnace: drying agent of pulverizing systems, air, coal dust, reactive fuel, and circulating gases. Furnace provides for three-stage combustion of pulverized coal and reactive fuel with its reliable ignition and intensive mixing with secondary and tertiary air. EFFECT: reliable suppression of nitrogen oxides. 3 cl, 2 dwg