| 摘要 |
PURPOSE:To enable an efficient supply of black liquid to a fluidized bed and improve boiler efficiency by a method wherein an alkali waste liquid spray nozzle having several holes at the lower surface is arranged over a fluidized bed within a fluidized bed type furnace. CONSTITUTION:This device is composed of a fluidized bed type furnace 1, a steam drum 2, a water drum 3 and a coal saver 4; a wind box 5 is arranged at the bottom part of the furnace 1, and an air dispersion plate nozzle 6 over the wind box 5. A fluidized bed layer 7 is formed over the nozzle 6 anda thermal conduction pipe 8 is arranged within the fluidized bed layer 7. An alkali waste liquid spray nozzle 12 having several holes 11 at the lower surface and rotatable in a circumferential direction is arranged over the fluidized bed layer 7. The nozzle 12 is reciprocated and rotated, and thereby the black liquid is dispersed downwardly and injected, and the fluidized medium and kali agent enter the fluidized bed 7 floating like a boiled condition, with the result that an efficient combustion and reaction is performed.
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