Bench-scale combustion characterization of cleaned Kentucky No. 9 coals: Final report
Many previous studies have attempted to quantify the effects of coal quality on power plant performance to justify use of cleaned coal. These studies indicated that the use of cleaned coal can improve reliability, increase availability, and reduce maintenance costs. However, the cost/benefit advantages of cleaned coals have not been clearly demonstrated to utilities. The Electric Power Research Institute has launched a program to evaluate the effects of coal quality on power plant performance. This project was designed to study combustion characteristics of raw and cleaned coals. To evaluate and demonstrate the relative merits of clean coal versus raw coal to electric utilities, it is necessary to test and compare the properties and characteristics of both types of coals. The areas of major interest include grindability and abrasion behavior, ignitability and combustion efficiency, slagging and fouling potential, sulfur and nitrogen oxides emission potential, and fly ash collection efficiency. The properties and characteristics of two levels (medium and deep) of cleaned Kentucky No. 9 coal were tested and compared to those of the raw coal. The cleaned coals were prepared at EPRI's Coal Cleaning Test Facility (CCTF) at Homer City, Pa. The test results indicate that certain advantages, in addition to reducing sulfur oxides emissions, can be attained by coal cleaning. Use of cleaned Kentucky No. 9 coals in existing units will allow the following improvements to be realized: increased pulverizer grinding element lives, reduced pulverized-coal and fly ash erosion, and reduced particulate emissions potential. It appears that there are significant advantages in using the cleaned Kentucky No. 9 coals. However, other cleaned coals may not show similar advantages, and the costs/benefits of using cleaned coals must be assessed on an individual basis. 15 refs., 5 figs., 14 tabs.
- Research Organization:
- Babcock and Wilcox Co., Alliance, OH (USA). Research and Development Div.; Electric Power Research Inst., Palo Alto, CA (USA)
- OSTI ID:
- 6825815
- Report Number(s):
- EPRI-CS-5070; ON: TI87920277
- Country of Publication:
- United States
- Language:
- English
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Combustion characterization of the Kentucky No. 9 cleaned coals: Final report
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
ASHES
CHEMICAL COMPOSITION
DEPOSITION
BOILERS
FOULING
COAL
COMBUSTION PROPERTIES
COAL PREPARATION
CHEMICAL STATE
COST BENEFIT ANALYSIS
TEST FACILITIES
VISCOSITY
EMISSION
MELTING
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION ABATEMENT
GRINDING MACHINES
EROSION
SERVICE LIFE
PARTICULATES
SLAGS
SULFUR
SULFUR DIOXIDE
BENCH-SCALE EXPERIMENTS
CALORIFIC VALUE
CLEANING
COMBUSTION
FLY ASH
RECOMMENDATIONS
SLAGGING PYROLYSIS PROCESS
TEMPERATURE DEPENDENCE
AEROSOL WASTES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MACHINE TOOLS
MANAGEMENT
MATERIALS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
POLLUTION ABATEMENT
POWER PLANTS
PROCESSING
RESIDUES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TOOLS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
014000* - Coal
Lignite
& Peat- Combustion
200108 - Fossil-Fueled Power Plants- Fuels- (1980-)
010300 - Coal
Lignite
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200101 - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems