BOILER Russian patent published in 1996 - IPC

FIELD: power engineering. SUBSTANCE: boiler has nozzles 6 and 7 for directing recirculating gases to gas pipeline 3. Cutoff device 8 is positioned by mechanism 9 so that optimum penetration depth of recirculating gas flows and complete mixing of gases in gas pipeline 3 are provided. When boiler operating mode is changed, gas flow penetration depth is changed either. In this case complete mixing of gases is effectuated by moving cutoff device 8 by mechanism 9 to position enabling complete mixing of gases in given burner operating mode. Complete mixing of gases in gas pipeline 3 allows uniform gas temperature to be provided in zone adjacent to convective pit. EFFECT: increased economy by improved gas mixing, simplified construction and enhanced reliability in operation. 1 dwg