Secondary atomization of single coal-water fuel droplets
The evaporative behavior of single, well characterized droplets of a lignite coal-water slurry fuel (CWSF) and a carbon black in water slurry was studied as a function of heating rate and droplet composition. Induced droplet heating rates were varied from 0 to 10{sup 5} K/s. Droplets studied were between 97 and 170 {mu}m in diameter, with compositions ranging from 25 to 60% solids by weight. The effect of a commercially available surfactant additive package on droplet evaporation rate, explosive boiling energy requirements, and agglomerate formation was assessed. Surfactant concentrations were varied from none to 2 and 4% by weight solution (1.7 and 3.6% by weight of active species on a dry coal basis). The experimental system incorporated an electrodynamic balance to hold single, free droplets, a counterpropagating pulsed laser heating arrangement, and both video and high speed cinematographic recording systems. Data were obtained for ambient droplet evaporation by monitoring the temporal size, weight, and solids concentration changes. 49 refs., 31 figs.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (USA). Combustion Lab.
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG21-87MC24213
- OSTI ID:
- 5142017
- Report Number(s):
- DOE/MC/24213-2773; ON: DE90000433
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON BLACK
ATOMIZATION
FUEL SLURRIES
ADDITIVES
LIGNITE
BOILING
COMBUSTION
DROPLETS
EVAPORATION
INTERFACES
NAPHTHALENE
PROGRESS REPORT
SULFONATES
SURFACTANTS
AROMATICS
BROWN COAL
CARBON
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
CONDENSED AROMATICS
DISPERSIONS
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
SLURRIES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion