CIRCULATING FLUIDISED BED WITH SECONDARY AIR SUPPLY NOZZLES TO FURNACE CHAMBER Russian patent published in 2015 - IPC F23C10/00 

FIELD: power industry.

SUBSTANCE: invention relates to power engineering and can be used in boilers with circulating fluidised bed. A boiler includes a reaction chamber where boiling fluidised bed is contained in a casing in the lower part of the reaction chamber and includes a heat exchanger in the bed that occupies some part of the bottom of the reaction chamber. A set of nozzles for supply of secondary air in the bed includes a set of tubes, which are grouped together and pass through width of boiling fluidised bed between the wall of the boiling fluidised bed casing and an external wall of the circulating fluidised bed. Nozzles prevent deviations of solid particles falling down onto boiling fluidised bed from circulating fluidised bed by means of secondary air jets, thus, avoiding a complex structure that would interfere with flow of gas and/or solid particles in the furnace chamber. Outlet holes of nozzles are located flush or almost flush with the boiling fluidised bed casing wall.

EFFECT: improvement of the structure.

7 cl, 5 dwg