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APEX performed a boiler study at GDF Suez's Pinetree Power facility to determine the modifications required to lower the temperature of steam entering the primary superheater outlet header below 900°F. This study was based on the current performance, which indicated an abnormally high primary superheater outlet temperature of 966°F.
The following parameters were determined from available plant data as well as calculations to effectively evaluate the current boiler performance.
- Final steam temperature, pressure, and flow
- Economizer inlet / outlet feed water temperature
- Air heater inlet / outlet flue gas temperature
- Flue gas % bypassed from economizer
- Air heater inlet / outlet air temperature
- Fuel and ash ultimate analyses
- Boiler exit O2 %
- Spray flow
- Radiant super heater inlet steam temperature
- Flue gas flow rate (based on the sum of fuel flow and combustion air flow)
- Furnace exit gas temperature
- Flue gas velocities across heat transfer bundles
The following recommendations were provided for optimizing boiler performance:
- Monitor primary superheat outlet steam temperature & modify soot blowing cycles accordingly.
- Monitor excursions in drum level, drum pressure & drum outlet temperature on a regular basis
- Increase the portion of primary air entering the furnace
Client: Pinetree Power Fitchburg, Inc.
Contact: Michael Buckman (508) 954-1101
Completion Date: March 2014