Consideration is given to a method of mechanoactivation intensification of the flame combustion of a pulverized coal fuel through the formation of a stressed state for the microstructure of its particles; the method is based on the use of the regularities of their external (diffusion) and internal (relaxation) kinetics. A study has been made of mechanoactivation nonequilibrium processes that occur in fuel particles during the induced relaxation of their stressed state with a resumed mobility of the microstructure of the particles and intensify diffusion-controlled chemical reactions in them under the assumption that the time of these reactions is much shorter than the times of mechanical action on a particle and of stress relaxation in it. The influence of the diffusion and relaxation factors on the burnup time of a fuel particle and on the flame distance has been analyzed. Ranges of variation in the parameters of flame combustion have been singled out in which the flame distance is determined by the mechanisms of combustion of the fuel and of mixing of combustion products.
Similar content being viewed by others
References
G. von Heinicke, Tribochemistry [Russian translation], Mir, Moscow (1987).
P. Yu. Butyagin, Structural disordering and mechanochemical reactions in solids, Usp. Khim. Nauk, 53, No. 11, 1769–1789 (1984).
A. P. Burdukov, V. I. Popov, and V. A. Falee, Study of mechanically activated coal combustion, Therm. Sci., 13, No. 1, 127–138 (2009).
T. M. Khrenkova, Mechanochemical Activation of Coals [in Russian], Nedra, Moscow (1993).
V. I. Popov, Diffusion-relaxation model of flame combustion of fuel, Khim. Tverd. Topliva, No. 4, 39–49 (2007).
A. S. Torgashin, Influence of Mineral Components and of Modifying Treatments on the Supramolecular Power and Reactivity of Brown Coals, Candidate′s Dissertation in Chemical Sciences, Inst. Khim. i Khim. Tekhnol., Krasnoyarsk (2009).
V. I. Popov, Stressed state of chemically active polymeric systems under shear, elongation, and oscillating deformations, J. Eng. Phys. Thermophys., 86, No. 1, 171–177 (2013).
V. I. Popov, Mechanoactivation of the process of transfer in polymeric systems, Zh. Prikl. Mekh. Tekhn. Fiz., 53, No. 6, 88–97 (2012).
I. M. Belkin, G. V. Vinogradov, and A. I. Leonov, Rotary Devices. Measuring Viscosity and Physicochemical Characteristics of Materials [in Russian], Mashinostroenie, Moscow (1968).
A. S. Lodge, J. D. Schieber, and R. B. Bird, The Weissenberg effects at finite rod-rotation speed, J. Chem. Phys., 88, No. 6, 4001–4007 (1988).
G. T. Knorre, K. M. Aref’ev, A. G. Blokh, and E. A. Nakhapetyan, The Theory of Burning Processes [in Russian], Énergiya, Moscow (1966).
L. N. Khitrin, Combustion and Explosion Physics [in Russian], Moskovskii Gos. Univ., Moscow (1957).
D. M. Khazmalyan and Ya. A. Kagan, Combustion Theory and Furnace Units [in Russian], Énergiya, Moscow (1976).
V. V. Pomerantsev, K. M. Aref’ev, and D. B. Akhmedov, Fundamentals of Practical Combustion Theory [in Russian], Énergoatomizdat, Leningrad (1986).
D. B. Spalding, Foundations of Combustion Theory [Russian translation], Gosénergoizdat, Moscow (1959).
Ya. P. Terletskii, Statistical Physics [in Russian], Vysshaya Shkola, Moscow (1966).
Yu. A. Buevich, On the kinetics of mass exchange of a polydisperse system of particles with the environment, Zh. Prikl. Mekh. Tekhn. Fiz., No. 1, 50–57 (1966).
Yu. M. Goldobin, Kinetics of combustion of polydispersed coke dust, J. Eng. Phys. Thermophys., 50, No. 1, 95–101 (1986).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 90, No. 6, pp. 1415–1423, November–December, 2017.
Rights and permissions
About this article
Cite this article
Popov, V.I. Intensification of the Process of Flame Combustion of a Pulverized Coal Fuel. J Eng Phys Thermophy 90, 1344–1352 (2017). https://doi.org/10.1007/s10891-017-1692-9
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10891-017-1692-9