Prediction of high-intensity pulverized coal combustion

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Combust. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/00102208608923848· OSTI ID:5720555

Suzuki, T; Smoot, D; Fletcher, T H; Smith, P J

The overall characteristics of high-intensity pulverized coal combustion have been predicted by a one-dimensional model. The mixing of the primary stream of pulverized coal and transport air with secondary combustion air was estimated by a growth angle of the primary jet. The coal particle burnout was strongly affected by the extent of devolatilization, which varies among coals. The extent of devolatilization as characterized by variation in a devolatilization coefficent was correlated with either proximate volatiles percentage or H/C mass ratio of the virgin coal. The resulting comparisons of predictions with measurements for eight coal types and three different combustors show that observed trends are generally predicted. The data used for these comparisons were obtained from a wide range of high-intensity combustion experiments. The proximate volatile matter in the virgin test coals ranged from 16 to 40 percent while the coal feed rate was varied from 12 to 290 kg/hr. Combustion air temperature varied from 297 to 1483 K while residence time range from 3 to 140 ms. Comparative results suggest that the predictive method can be useful in interpreting high intensity combustion test results.

• Research Organization: Chemical Engineering Dept., Brigham Young Univ., Provo, UT 84602
• OSTI ID: 5720555
• Journal Information: Combust. Sci. Technol.; (United States), Journal Name: Combust. Sci. Technol.; (United States) Vol. 45:3/4; ISSN CBSTB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
AIR
AIR HEATERS
CARBON
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
DEVOLATILIZATION
ELEMENTS
FLUIDS
GASES
HEATERS
HIGH TEMPERATURE
HYDROGEN
INCIDENCE ANGLE
JETS
MATHEMATICAL MODELS
MATTER
MEDIUM TEMPERATURE
MIXING
NONMETALS
OXIDATION
PULVERIZED FUELS
QUANTITY RATIO
THERMOCHEMICAL PROCESSES
TIME MEASUREMENT
VERY HIGH TEMPERATURE
VOLATILE MATTER