CONTROL METHOD OF OPERATION OF CLEANING DEVICES OF BOILER FURNACE HEATING SURFACES

摘要

FIELD: power industry.SUBSTANCE: control method of operation of cleaning devices of the boiler furnace heating surfaces involves electromagnetic emission scanning of walls and water wall tubes of the furnace, determination of critical slagging intensity of its heating surfaces and activation and deactivation of cleaning devices. It is proposed to scan the furnace water walls through opposite lying hatches by means of electromagnetic emission with a directivity pattern in the form of a narrow beam; scanning of walls is performed by linear movement of the narrow beam, in horizontal plane and across water wall tubes; initial scanning of walls is performed prior to the beginning of the furnace operation; a variable component determined with a regular structure of the wall surface is separated from the accepted reflected electromagnetic signal and transmitted to the filter-detector that is tuned to parameters of the signal; further scanning operations of the same walls are performed during the furnace operation; those reflected signals are received and supplied to the filter-detector; slagging intensity degree of each section of the heating surface is determined as per the value of electromagnetic signal from the filter-detector outlet.EFFECT: method improves accuracy and reliability of detection of critically slagged surfaces.5 dwg