Effect of coal particle size on fouling potential of a high sodium North Dakota lignite coal. [Standard grind size vs micronized]

Technical Report · Wed Feb 01 04:00:00 EST 1984

OSTI ID:5228087

Jones, M L; Miller, B G

An area of interest for almost twenty years has been ash fouling in low-rank coal combustion systems. Studies over the years have involved monitoring of full-scale combustion facilities, work on pilot scale pc-fired combustion units, and laboratory work to characterize ash fouling deposits and examine mineral matter transformation. Micronized coal has been discussed as an alternate fuel for utility and industrial size boilers. Previous work has shown that micronized bituminous coal has potential as an alternate fuel in boilers designed for oil or gas. Test results indicated decreased deposition rates, and increased sintered strength of fly ash produced during combustion. In addition, others have shown that lignites even with high moisture content can be micropulverized and therefore considered for firing in this form. This paper describes recent work at UNDERC to examine the effect of coal particle size on ash fouling when burning a high fouling North Dakota lignite. Differences were noted in the rate of deposition, strength of deposits, and composition of deposits produced from a standard utility grind and a much finer (micronized) grind. 7 references, 5 figures, 5 tables.

• Research Organization: North Dakota Univ., Grand Forks (USA). Energy Research Center
• DOE Contract Number: FC21-83FE60181
• OSTI ID: 5228087
• Report Number(s): DOE/FE/60181-29; CONF-840262-1; ON: DE84007411
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200101 -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
ASHES
BOILERS
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL FINES
COHERENT SCATTERING
COMBUSTION
DATA
DEPOSITS
DIFFRACTION
ELECTRON MICROSCOPY
ENERGY SOURCES
EXPERIMENTAL DATA
FEDERAL REGION VIII
FOSSIL FUELS
FOULING
FUELS
INFORMATION
LIGNITE
MATERIALS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
NORTH AMERICA
NORTH DAKOTA
NUMERICAL DATA
OXIDATION
PARTICLE SIZE
PHASE STUDIES
RESIDUES
SCATTERING
SIZE
THERMOCHEMICAL PROCESSES
USA
X-RAY DIFFRACTION
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS