HORIZONTAL ROTARY DRYER FOR COAL, COAL BOILER PLANT, AND METHOD FOR OPERATING COAL BOILER PLANT

摘要

PROBLEM TO BE SOLVED: To provide a horizontal rotary dryer for coal which can optionally select target powdered coal to be removed in response to the type of coal, etc.;SOLUTION: The horizontal rotary dryer of coal includes: a rotating cylinder 10 which has a supply port 41 of coal C1 and a blowing port 41 of carrier gas G1 on the one end side, and a discharge port 50 of dried coal C2 and exhaust gas on the other end side; a heating means 11 for heating the coal C1 inside this rotary pipe 10; and a classification hood 55 which covers the discharge port 50, has a fixed discharge port 57 of the dried coal C2 in a bottom 55d, and has a fixed exhaust port 56 of exhaust gas G2 in a top part 55u. The horizontal rotary dryer for coal includes: an upward flow generation means 58 for generating an upward flow within the classification hood 55; and a flow rate control means 14 for controlling the flow rate of the upward flow. Part or all of the powdered coal in the dried coal C2 is discharged from the fixed exhaust port 56 by the upward flow.;COPYRIGHT: (C)2012,JPO&INPIT