Fundamental combustion studies of low-rank coal slurries. Quarterly technical progress report No. 9, March 1-May 31, 1986

Technical Report · Sun Jun 15 04:00:00 EDT 1986

OSTI ID:5720803

Germane, G J; Smoot, L D

This contract for fundamental combustion studies of low-rank coal slurries was initiated March 1, 1984. Slurries being studied are primarily those produced from steam-dried lignite coal provided by the Grand Forks Project Office. Contract work includes virgin coal and slurry characterization, slurry spray and atomization measurements, and parametric combustion optimization tests. Also included are detailed mapping of combustion products and pollutants for low-rank coal slurries in a laboratory reactor and comparison of results with computer model predictions, and with data obtained earlier under similar conditions from combustion of high-rank coal-water mixtures. The coal slurry characterization and spray studies have been nearly completed. No significant additional results were obtained during this quarterly reporting period. A summary of the principal activities during the past quarter follows for the lignite slurry combustion characterization studies. Parametric optimaization combustion tests continued during the reporting period. Flame front location moved down the reactor as air to slurry flow rate ratio (A/S) decreased. Maximum coal burnout of over 99% was achieved at a stoichiometric ratio of 1.1, an A/S of 0.8 and a combustion air swirl number of 1.5. Combustion tests at a variety of spray conditions indicate that the most significant factors affecting coal burnout are droplet size and spray angle. The droplet size and spray angle are most strongly influenced by A/S for a particular nozzle.

• Research Organization: Brigham Young Univ., Provo, UT (USA). Combustion Lab.
• DOE Contract Number: AC21-84FC10614
• OSTI ID: 5720803
• Report Number(s): DOE/FC/10614-T51; ON: DE86013115
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ASHES
ATOMIZATION
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
DISPERSIONS
ELECTRON MICROSCOPY
ENERGY SOURCES
FOSSIL FUELS
FUEL SLURRIES
FUEL-AIR RATIO
FUELS
HYDROGEN COMPOUNDS
LIGNITE
MATERIALS
MICROSCOPY
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARAMETRIC ANALYSIS
PERFORMANCE TESTING
RESIDUES
SCANNING ELECTRON MICROSCOPY
SLURRIES
SPRAYS
SUBBITUMINOUS COAL
SUSPENSIONS
TESTING
THERMOCHEMICAL PROCESSES
WATER