FREEZING PREVENTION METHOD AND CONTROLLER FOR COAL STOKING BOILER COAL SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To enable air after coal heating to be released to air as it is by using air preheated by exhaust gas as a heat source, and besides, to dispense with a new power source because it uses air supplied from a forced draft fan. ;SOLUTION: This method prevents the freezing in a coal stoking boiler coal supply system which uses coal 4 as fuel. In this case, for the coal 4 supplied into a coal banker 3, the air preheated with exhaust gas is used as a heat source, and the quantity of air is controlled by the temperature sensor 26 provided within the coal banker 3. Hereby, this can prevent it from falling under the sulfuric acid dew point.;COPYRIGHT: (C)1999,JPO