BOILER FURNACE Russian patent published in 2005 - IPC

FIELD: boiler equipment.

SUBSTANCE: furnace can be used in structures of boilers with layer-by-layer burning of solid fuel at fire grates. Furnace of boiler has unit for feeding fuel, fire grate providing supply of primary air, secondary air nozzles' tiers disposed at face and back walls. There are two tiers of nozzles of secondary air on the face wall. Secondary air nozzles of lower tier are disposed lower than unit for feeding fuel and higher than fire grate; they are oriented similarly at the same plane along its surface. Secondary air nozzles of higher tier are disposed above unit for feeding fuel and oriented down at the same plane which makes acute angle with face wall. There is tier of secondary air nozzles at the back wall which nozzles are oriented at the same plane to unit for feeding fuel.

EFFECT: improved burn-out of small fractions.

8 cl, 3 dwg