Boiler efficiency depends on good heat transfer rates. The transfer rate is improved by blowing gas on heat transfer
surfaces to remove the combustion buildup (soot blowing).
It has been found that soot blowing losses can vary a great
deal depending on the operator and type of coal burned.
Gas temperature measurements can be used as a direct
indication of soot buildup, by installing the BOILERWATCH
MMP-
Monitor flue gas temperature from 32ºF to 3500 F (0ºC to
1927 C) for boiler startup preventing overfiring that could
damage superheat tubes, or underfiring that could potentially
send wet steam to the steam turbine damaging buckets.
An accurate control of superheat temperature is important for efficient power plant operation.
Monitor maximum allowable temperature in the boiler superheat/reheat section for ash fusion alarm point annuciation.
FEGT should be maintained below the ash fusion temperatureto minimize the slagging
and fouling. Operating FEGT above the design value can alter the design condition
and cause long-
FEGT exceeds the desired value, the operator can exerciseother options to reduce it.
The operator close the burnes air register of the first burner line. The cold air was creaing a bad combustion and after 45 minutes the heat distribution was at the center.
