FLUE GAS TREATMENT SYSTEM AND METHOD OF COAL BURNING BOILER

摘要

PROBLEM TO BE SOLVED: To provide a flue gas treatment system and a method of a coal burning boiler having an electrostatic precipitator, wherein electrostatic precipitation efficiency is constantly stable without generating back discharge at all times.;SOLUTION: This flue gas treatment system of the coal burning boiler is provided with: a GGH heat recovery part 3a, a heat recovering device recovering heat of exhaust gas of the coal burning boiler 1; and the dry type electrostatic precipitator (dry type EP) 4 provided at the rear stream side of the GGH heat recovery part 3a and collecting soot and dust in the exhaust gas. A steam or water injection device 20, as a relative humidity increasing device for increasing relative humidity by injecting any one of or both of steam and water into exhaust gas G2, is provided on the upstream side of the GGH heat recovery part 3a.;COPYRIGHT: (C)2008,JPO&INPIT