CYCLONE-TYPE FURNACE EXTENSION Russian patent published in 2002 - IPC

FIELD: arrangements for simultaneous or alternate combustion of liquid and gaseous fuel. SUBSTANCE: furnace extension has air supply duct, combustion chamber, axial-flow injector with peripheral swirl generator, and device for supplying gas to duct interior and to swirl generator; mentioned device is provided with nozzles in the form of subsonic ejectors; combustion chamber has tangential air-supply nozzles whose outlet flow area reduces with increase in distance from injector; gas supply device is built up of pipeline and two gas manifolds; pipeline feeding gas into duct is equipped with gate valve. EFFECT: enhanced reliability and economic efficiency of fuel combustion at all fuel-to-air ratios and loads carried by boiler unit. 3 cl, 2 dwg