COAL DRYING SYSTEM USING MULTI-HEATED HIGH-TEMPERATURE SUPERHEATED STEAM TO MAINTAIN PROPER MOISTURE CONTENT OF COAL

摘要

PURPOSE: A coal drying system using multi-heated high-temperature superheated steam is provided to improve heat distribution in a generator boiler and prevent blockage of a coal transfer passage.;CONSTITUTION: A coal drying system using multi-heated high-temperature superheated steam comprises a superheated steam boiler(70) which burns fuel in a gas tank to heat the water in a water tank and generate superheated steam, a superheated steam drying device(110) which transfers coal with a steam conveyor belt and removes the surface moisture of the coal with superheated steam supplied from a superheated steam reheater(300), a high-temperature air drying device(120) which transfers coal with a dry conveyor belt and removes the internal moisture of the coal with high-temperature air supplied from a high-temperature air feeder(60), and a natural drying device(140) which transfers coal with a flat conveyor belt and naturally evaporates moisture at room temperature to lower the temperature of the coal.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Coal reservoir; (110) Superheated steam drying device; (120) High-temperature air drying device; (140) Natural drying device; (20) Aligner; (30) Heat exchanger; (300) Superheated steam reheater; (40) Washer; (50) Silo; (60) High-temperature air feeder; (70) Superheated steam boiler; (AA) Gas; (BB) Water; (CC) Waste water reservoir; (DD) Thermal power plant boiler