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-II-SSX.
The microphone that is located in the waveguide can hear the normal noise of the
boiler / furnace continuously and displays a graphical trend for 24 hours a day,
365 days a year.
The noise detection system allows you to view any abnormalities in the chart outside
the normal acoustic parameters of the boiler / furnace and tube rupture process,
soot blowers, etc.
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
Monitor maximum allowable temperature in the boiler superheat / reheat section for
ash fusion alarm point annuciation.
FEGT should be maintained below the ash fusion temperature to minimize the slagging
and fouling. Operating FEGT above the design value can alter the design condition
and cause long-term overheating of the convective pass pressure components. If FEGT
exceeds the desired value, the operator can exerciseother options to reduce it.
When combustion is improved within the furnace, the boiler can operate at reduced
excess O2 and reduced FEGT levels while also reducing localized hot spots, corrosive
gas conditions, slag formation, and carbon-in-ash.
The result of these operational improvements is reduced NOx emissions, increased
efficiency, reduced local slagging and corrosion, and improved carbon-in-ash.
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