FORCED FLUIDIZED BED BOILER Russian patent published in 2019 - IPC F23C10/18 F23C101/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to forcing fluidized bed (FFB) boilers. Boiler of forcing fluidized bed has fuel supply path, secondary blowing nozzles, system of return of flue formed by walls and limited from below by air distribution grate, connected to primary blowing path, forced fluidized bed reactor above which there is a furnace volume formed by screens, having larger cross-section area than reactor and connected to at least one convective gas duct of boiler. Furnace volume is made with expansion mainly along longitudinal symmetry axis of the boiler due to located at the bottom inclined section of screen and has at least two groups of secondary blowing nozzles, configured to deflect jets in vertical plane, installed at different height and located on opposite screens, wherein lower nozzles of secondary blowing are directed to inclined section of screen.

EFFECT: invention is aimed at deep and efficient control of steam superheat temperature.

10 cl, 5 dwg