Abstract
The temperature of carbon particles undergoing combustion in a fluidized bed is measured. Heat-transfer laws are ascertained.
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Abbreviations
- a :
-
diffusivity of air
- c:
-
heat capacity of air
- D:
-
diffusion coefficient of oxygen in air
- d0, d:
-
initial and running diameters of carbon sphere
- di :
-
diameter of inert particles
- k:
-
rate constant for carbon monoxide combustion
- q:
-
calorific value of carbon oxidation to CO2
- ΔT:
-
temperature difference between burning particle and fluidized bed
- X, Xn :
-
oxygen concentration in the fluidized bed and on the surface of the burning particle
- Z, Zn :
-
running concentration of carbon monoxide and concentration on the surface of the burning particle
- α:
-
heat-transfer coefficient between fluidized bed and burning particle
- αm :
-
maximum heat-transfer coefficient between fluidized bed and a stationary body submerged in the bed
- β:
-
masstransfer coefficient between fluidized bed and burning particle
- λ:
-
thermal conductivity of air
- ν :
-
kinematic viscosity of air
- ρ0, gr, ρ4 :
-
density of oxygen, air, and inert material
- ξ:
-
relative thickness of burning gas layer
- ψ:
-
relative thickness of diffusion boundary layer
Literature cited
J. E. Masko, “Combustion in limestone bed,” CEP, 1978, Fuel, No. 8, 99–102 (1978).
P. Basu, “Burning rate of carbon in fluidized bed,” Fuel,56, No. 10, 390–392 (1977).
R. K. Chakrabarty and I. R. Howard, “Burning rate and temperature of carbon particles in shallow fluidized-bed combustor,” J. Inst. Fuel, No. 12, 220–224 (1978).
I. G. Yates and P. R. Walker, “Particle temperature in a fluidized bed combustor,” in: Fluidization, Cambridge, Univ. Press (1978), pp. 241–244.
L. N. Khitrin, Physics of Combustion and Explosion [in Russian], Moscow State Univ. (1957).
V. V. Pomerantsev (editor), Principles of Applied Combustion Theory [in Russian], Énergiya, Leningrad (1973).
A. I. Tamarin, D. M. Galershtein, V. M. Shuklina, and S. S. Zabrodskii, “Study of convective heat transfer between a burning particle and a fluidized bed,” in: Heat Transfer in Disperse Systems [in Russian], Pt. 1, Vol. 6 of Heat- and Mass-Transfer, A. V. Lykov Institute of Heat and Mass Transfer, Academy of Sciences of the Belorussian SSR, Minsk (1980), pp. 44–49.
S. S. Zabrodskii, N. V. Antonishin, G. M. Vasil'ev, and A. L. Parnas, “Selection of a theoretical relation to determine coefficients of heat transfer between a high-temperature fluidized bed and a body immersed in it,” Izv. Akad. Nauk BSSR, Ser. Fiz. Energ. Nauk, No. 4, 103–107 (1974).
S. A. Malyukovich, S. S. Zabrodskii, and A. I. Tamarin, “Study of the effect of the height of the surface on the rate of heat transfer in a fluidized bed,” in: Problems of Intensifying Heat and Mass Transfer in Drying and Heating Processes [in Russian], Nauka i Tekhnika, Minsk (1967), pp. 138–143.
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 42, No. 1, pp. 21–27, January, 1982.
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Tamarin, A.I., Galershtein, D.M. & Shuklina, V.M. Heat transfer and the combustion temperature of coke particles in a fluidized bed. Journal of Engineering Physics 42, 14–19 (1982). https://doi.org/10.1007/BF00824983
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DOI: https://doi.org/10.1007/BF00824983