Fundamental combustion studies of low-rank coal slurries. Quarterly technical progress report No. 7, September 1, 1985-November 30, 1985

Technical Report · Mon Dec 16 04:00:00 EST 1985

OSTI ID:6407527

Germane, G J; Smoot, L D

Slurry spray mass distribution measurements were completed for 18 tests using the laboratory and commercial nozzles. Combustion test slurry spray was collected in the reactor using a patternator for a range of combustion air swirl numbers and atomizing air to slurry feed ratios. The distribution results were quantified by a defined spray angle parameter based on the second moment of the mass distribution about the centerline. Spray flux from the laboratory nozzle tends to be concentrated near the centerline of the nozzle while the commercial atomizer produces a heavy spray flux in an annular cone around the spray centerline. Slurry spray mass distribution for both nozzles is affected significantly by air to slurry mass flow ratio, but not by swirl. Significant progress was made toward completion of the combustion optimization tests with lignite coal-water slurry. Some preliminary observations can be made concerning flame stability, carbon burnout and NO pollutant levels. High values of stoichiometric ratio, swirl number and atomizing air flow produced a strong, attached flame. Low values of these parameters produced detached, weak flames which did not extinguish. Carbon burnout up to 99% was measured, with an apparent strong, direct dependence on atomizing air to slurry feed ratio. The NO emissions seem to be most strongly influenced by stoichiometric ratio. The detailed combustion mapping tests will follow the parametric optimization tests in progress. 8 refs., 25 figs., 2 tabs.

• Research Organization: Brigham Young Univ., Provo, UT (USA). Combustion Lab.
• DOE Contract Number: AC18-84FC10614
• OSTI ID: 6407527
• Report Number(s): DOE/FC/10614-T40; ON: DE86005747
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ATOMIZATION
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL RANK
COMBUSTION
COMBUSTION PROPERTIES
DISPERSIONS
ENERGY SOURCES
FLAMES
FLUID FLOW
FOSSIL FUELS
FUEL SLURRIES
FUEL-AIR RATIO
FUELS
GAS FLOW
HYDROGEN COMPOUNDS
LIGNITE
MATERIALS
MATHEMATICAL MODELS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
SLIP FLOW
SLURRIES
SPRAYS
STABILITY
SUSPENSIONS
TESTING
THERMOCHEMICAL PROCESSES
WATER