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Fundamental combustion studies of low-rank coal slurries. Quarterly technical progress report No. 3, September 1-November 30, 1984

Technical Report ·
OSTI ID:6181577
;
Rheological measurements of the lignite slurry dried at 300/sup 0/C were conducted for solids loading ranging from 43 to 60% in a capillary viscometer. The slurries generally exhibited shear thinning behavior at high shear rates and Newtonian behavior at lower shear rates. At 60% solids, the slurry was still pourable and appeared to be yield-pseudoplastic, and nearly Newtonian at shear rates of 200 to 500 sec/sup -1/. Characterization of physical properties for the subbituminous coal slurries was completed, which showed lower ash and moisture levels than for the lignite slurries. However, opposite to the trend observed for the lignite slurries, the residual moisture in the coal from the subbituminous slurries was higher for the lower process temperature. Installation of the reactor has been nearly completed in the test bay. Investigations of methods to study slurry dispersion, droplet size, droplet/particle velocity and trajectory continued. Apparatus necessary for spray isolation and dispersion measurement has been designed. Demonstration tests with air/water sprays indicate that the spray isolation equipment will be adequate. A review of commercial and laboratory slurry nozzles was completed. Arrangements to receive at least one commercial atomizer were made for possible use, in addition to the slurry nozzle developed at this laboratory, in the spray and combustion tests. 10 references, 7 figures, 2 tables.
Research Organization:
Brigham Young Univ., Provo, UT (USA). Combustion Lab.
DOE Contract Number:
AC18-84FC10614
OSTI ID:
6181577
Report Number(s):
DOE/FC/10614-T14; ON: DE85003978
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
014000 -- Coal
Lignite
& Peat-- Combustion
ASH CONTENT
ATOMIZATION
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
DISPERSIONS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUEL SLURRIES
FUELS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
INFORMATION
LIGNITE
MATERIALS
MIXTURES
MOISTURE
NOZZLES
NUMERICAL DATA
OXIDATION
OXYGEN COMPOUNDS
RESEARCH PROGRAMS
RHEOLOGY
SHEAR
SLURRIES
SPRAYS
SUBBITUMINOUS COAL
SUSPENSIONS
THERMOCHEMICAL PROCESSES
WATER