Single droplet combustion of coal slurry fuels

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(83)90094-9· OSTI ID:5887683

Sakai, T; Saito, M

The combustion characteristics of single droplets of coal slurry fuels were experimentally investigated using both spontaneous and forced ignition. Results showed that the combustion is a sequential two-stage process, consisting of gas-phase combustion of the volatiles followed by combustion of the solid residue, which is mostly carbon. A splashing combustion phenomenon, which corresponds to the outgassing of the thermally cracked fuel gas from the droplet interior, occurred during the later period of gas-phase combustion in the same way as for residual heavy fuel oils. The duration of combustion of the solid residue agglomerate was several times longer than that of the volatiles, and thus constituted a major part of the total burning time, the overall burning rate coefficients of coal slurry fuels were 1/2 to 1/4 times those of residual heavy fuel oils because of the long solid combustion time. The overall burning rate coefficient was found to depend mainly on the residual carbon content of the coal slurry fuel.

• OSTI ID: 5887683
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 51:2; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
DISPERSIONS
DROPLETS
ENERGY SOURCES
FOSSIL FUELS
FUEL SLURRIES
FUELS
IGNITION
KINETICS
MATERIALS
MIXTURES
OXIDATION
PARTICLES
REACTION KINETICS
SLURRIES
SOLVENTS
SUSPENSIONS
THERMOCHEMICAL PROCESSES