BOILER FURNACE Russian patent published in 1998 - IPC

FIELD: heat power engineering; thermal power stations. SUBSTANCE: boiler furnace includes water walls 1 forming polyhedral gas duct divided by walls 2 having two rows of ports into central combustion chamber 3 and peripheral combustion chamber 4 which are communicated through upper and lower bypass ports 5 and 6; walls 2 adjoin adjacent water walls 1 forming corners of gas duct where burners 7 and air nozzles 8 are fitted; they are directed respectively inside peripheral and central combustion chambers 4 and 3. Each peripheral combustion chamber 4 is provided with hearth consisting of two slopes 9 and 10 mounted at angle relative to each other and to level. Slopes 9 and 10 are made due to projection of water walls 1 inside peripheral combustion chambers 4; tops of slopes separated by angle of opening of air nozzle 8 located under them form the above-mentioned lower bypass port 6. EFFECT: simplification of construction of boiler furnace. 3 dwg