FURNACE Russian patent published in 1994 - IPC

FIELD: circulating-bed boilers. SUBSTANCE: furnace has water-cooled combustion chamber 1 confined at bottom with air-distributing screen 3 and on top, with circulating particles catcher made as main cyclones 5 and 6 with secondary-blast nozzles 12 and inlet swirler, as well as additional cyclones 5 and 6 mounted on barrier 4 together with main cyclones. Cyclones 5 and 6 are swirl-type devices with secondary-blast nozzles 12 tangentially connected and bent down or with concurrent secondary-blast nozzles 12 placed in outlet channels 7. Besides, cyclone swirls have circular slits 14 oriented in opposition to or concurrently with uptake gas flow and accommodating tilted blades 9 and/or connected through tangential channels 10 to air conduits 13. EFFECT: improved design. 2 cl, 3 dwg