CHECK UP THE OPERATION OF THE PLANT BY MEANS OF INSTRUMENT AND SIGNAL LAMP IN THE RECTIFIER CONTROL PANEL AND AUXILIARY CONTROL PANEL.
AT NORMAL PERATION,VOLTMETERS AND AMMETERS ON RECTIFIER CONTROL PANELS WILL FUNCTION PROPERLY AND FAULT LAMPS WILL NOT GLOW.
CHECK AT LEAST TWICE EVERY SHIFT THAT THE RECTIFIER UNITS ARE FUNCTIONING,THERAPPING MECHANISMS FOR EMITTING AND COLLECTING SYSTEMS ARE FUNCTIONING,ALL THE ASH HANDLING EQUIPMENT ARE WORKING AND DUST IS TRANSPORTED IN A PROPER WAY.
PRECIPITATOR CURRENT,PRECIPITATOR VOLTAGE,BOILER LOADIG,FLUE GAS TEMPERATURE AT THE INLET OF PRECIPITATOR AND CONDITION OF ASH DISPOSAL SYSTEM MUST BE CHECKED PREFERABLY EVERY 30 MINUTES.
Battery Reconditioning Course
Saturday, June 28, 2008
OPERATION OF ESP
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.
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.
ELECTROSTATIC PRECIPITATOR
THE MAJOR FUNDAMENTAL PARTS OF THE ELECTROSTATIC PRECIPITATOR CONSIST OF CASING,HOPERS,GAS DISTRIBUTOR SCREEN,COLLECTING SYSTEM,EMITTING SYSTEM,RAPPING MECHANISM FOR EMITTING SYSTEM,INSULATOR HOUSING AND HIGH VOLTAGE RECTIFIER AND CONTROLS.
FOR OPTIMUM FUNCTIONAL FUNCTIONAL EFFICIENCY OF THE PRECIPITATOR,THE SUPPLIED VOLTAGE SHOULD BE MAINTAINED NEAR ABOUT THE FLASH LEVEL BETWEEN THE PRECIPITATOR ELECTRODES.THIS CAN BE ACHIEVED BY AN ELECTRONIC SYSTEM WHICH RAISES THE OUTPUT VOLTAGE TO A FLASH OVER.AN ADDITIONAL INCREASE IN CURRENT ACCOMPANIED BY HEAVY SPARKING AND RAPID REDUCTION IN DUST COLLECTION EFFICIENCY.EXPERIENCE HAS SHOWN THAT THE MAXIMUM DUST COLLECTION EFFICIENCY IS RELATED TO THE AMOUNT OF MINOR SPARKING THAT OCCURS ALONG ELECTRODES.
FOR OPTIMUM FUNCTIONAL FUNCTIONAL EFFICIENCY OF THE PRECIPITATOR,THE SUPPLIED VOLTAGE SHOULD BE MAINTAINED NEAR ABOUT THE FLASH LEVEL BETWEEN THE PRECIPITATOR ELECTRODES.THIS CAN BE ACHIEVED BY AN ELECTRONIC SYSTEM WHICH RAISES THE OUTPUT VOLTAGE TO A FLASH OVER.AN ADDITIONAL INCREASE IN CURRENT ACCOMPANIED BY HEAVY SPARKING AND RAPID REDUCTION IN DUST COLLECTION EFFICIENCY.EXPERIENCE HAS SHOWN THAT THE MAXIMUM DUST COLLECTION EFFICIENCY IS RELATED TO THE AMOUNT OF MINOR SPARKING THAT OCCURS ALONG ELECTRODES.
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