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DEVICE AND METHOD FOR IMPROVING LOW-GRADE COAL FOR A CIRCULATING/FLUIDIZED-BED POWER PLANT USING THE COAL ASH OF A FLUIDIZED-BED COMBUSTION FURNACE CAPABLE OF PREVENTING ENVIRONMENT CONTAMINATION RE-USING THE COAL ASH OF A FLUIDIZED-BED COMBUSTION FURNACE AS FLUIDIZING MEDIUM
DEVICE AND METHOD FOR IMPROVING LOW-GRADE COAL FOR A CIRCULATING/FLUIDIZED-BED POWER PLANT USING THE COAL ASH OF A FLUIDIZED-BED COMBUSTION FURNACE CAPABLE OF PREVENTING ENVIRONMENT CONTAMINATION RE-USING THE COAL ASH OF A FLUIDIZED-BED COMBUSTION FURNACE AS FLUIDIZING MEDIUM
PURPOSE: Device and method for improving low-grade coal for a circulating/fluidized-bed power plant using the coal ash of a fluidized-bed combustion furnace are provided to prevent clogging of a facility due to moisture by removing moisture through adding of quick lime to high-moisture and low-grade coal.;CONSTITUTION: A device for improving low-grade coal comprises coal and quick lime mixing unit(100) and a fluidizing-medium producing unit. The coal and quick lime mixing unit comprises a rotating nozzle A(113), a lower nozzle(114), a mixing unit A(120), a moisture discharge port(130), and a mixture discharge port A(140). The rotating nozzle A uniformly sprays quick lime into a housing(110). The lower nozzle sprays air into the housing. The mixing unit A mixes air, coal, and quick lime. The moisture discharge port discharges moisture removed fro coal by heat generated by exothermic reaction of the moisture of coal to the quick lime.;COPYRIGHT KIPO 2012
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