Natural gas/pulverized-coal cofiring performance testing at an electric-utility boiler. Topical report, June-October 1986
A field testing program was conducted at a 570-MW pulverized-coal electric-utility boiler to document the potential of cofiring natural gas with coal. The capacity of the gas equipment is 20% of the boiler rating. The report discusses the use of natural gas for sulfur control, smokeless start-ups, combustion improvement, control of furnace slag, carrying load during coal upsets and improving operation while firing potentially troublesome coals. Gas used for start-up and low load flame stabilization maintained precipitator cleanliness as confirmed by internal inspections. Testing documented the predicted change in flue-gas moisture concentration during cofiring. Also, the flue-gas acid dew point temperature was actually lowered by one to three degrees during cofiring. The optimization test program confirmed that gas use is a convenient and reliable method for maintaining production during coal upsets. The 120-MW design capacity of the gas system was achieved. Gas cofiring can be implemented to achieve an immediate reduction in SO/sub 2/ emissions. This gives greater coal-blending flexibility, while insuring that no SO/sub 2/ violations need occur. Utilizing the warm-up guns resulted in a 15% reduction in nitric oxide emissions.
- Research Organization:
- Energy Systems Associates, Tustin, CA (USA)
- OSTI ID:
- 6147082
- Report Number(s):
- PB-87-222717/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
01 COAL, LIGNITE, AND PEAT
COAL
COCOMBUSTION
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION ABATEMENT
FUELS
NATURAL GAS
SULFUR DIOXIDE
REMOVAL
BOILERS
NITROGEN OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
GAS FUELS
GASES
MATERIALS
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
200108* - Fossil-Fueled Power Plants- Fuels- (1980-)
034000 - Natural Gas- Combustion
014000 - Coal
Lignite
& Peat- Combustion