THE HEATERS FOR SHAFT AND SUPPORTING INSULATORS SHALL BE SWITHED ON PREFERABLY 24 HOURS BEFORE STARTING UP THE BOILER UNIT
AS SOON AS BOILER IS FIRED ,THE RAPPING MECHANISM MUST BE STARTED.IT IS PREFERABLY TO KEEP THE RAPPERS WORKING WHEN THE FLUE GAS IS PASSING THROUGH THE DUCTS SO THAT ELECTRODES ARE KEPT CLEAN.
INCOMING FLUE GASES WARM UP,DRY THE ELECTRODES AND DRIVES AWAY ANY RESIDUAL MOISTURE.THIS PROCESS MAY TAKE 2-3 HOURS FROM THE STARTING OF THE BOILER ,ROUGHLY COINCIDING WITH THE TIME TAKEN FOR STARTING OF THE COAL BURNING IN THE BOILER.
ASH HANDLING SYSTEM SHOULD BE IN OPERATION.NOW THE RECTIFIER CAN BE SWITCHED ON AND PRECIPITATOR ENERGISED.
SET THE SELECTOR SWITCH OF THE RECTIFIER CONTROL CUBICLE ON MANUAL.SET THE MANUAL SETTING ON MINIMUM.
PRESS THE STARTPUSH BUTTON ON THE CONTROL CUBICLES.
INCREASE THE MANUAL SETTING STATING SO THAT A WORKING CURRENT OF ABOUT 230-250/370-400/430-460/mA IS REACHED WITHOUT ABNORMAL FLASH OVERS.THIS COULD BE CHECKED FROM THE SWINGING OF THE MIDDLE-AMMETER NEEDLE.
WHEN THE OPERATION OF THE PRECIPITATOR IS STABLISED REDUCE THE MANUAL SETTING ZERO AND CHANGE THE SELECTOR SWITCH TO AUTO.THE SPARK RATE SHALL BE SET WITHIN 6 TO 10 FLASH PER MINUTE.
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