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Posted by sid on January 23, 2006 at 04:16:50:
In Reply to: PREPARING A BOILER FOR A INTERNAL INSPECTION posted by JOHN M. KOZARUK on January 22, 2006 at 22:18:41:
: AFTER MUCH CONVERSATION WITH MY FELLOW POWERPLANT ENGINEERS AND MANAGERS I FIND MYSELF ASKING IF THERE IS
: A STANDARD PROCEDURE FOR PREPARING A BOILER FOR INSPECTION.AFTER REPAIRS TO STRUCTUAL DAMAGE ON OUR
: 40,000#/HR HEAT RECOVERY BOILER I'VE RECOMMENED A LONGER COOL DOWN PERIOD AFTER THE UNIT IS TAKEN OUT OF SERVICE.MY RECOMMENDATION WAS AT LEAST A 24 HOUR COOL DOWN.PRESENTLY THEY ARE ONLY ALLOWING LESS THAN 8 HOURS.I'VE ALSO REQUESTED A LONGER WARM UP PERIOD WHEN BRINGING THE UNIT BACK ON LINE.THE BOILER RECEIVES ITS ENERGY FROM THE EXHAUST OF A GAS TURBINE USED TO DRIVE A GENERATOR.THE PLANT HAS AMPLE BOILER RESERVE TO MEET PLANT DEMANDS DURING DOWN TIME OF THE MENTIOED BOILER