Effect of Diffusion of Coal Pyrolysis Products on the Ignition Characteristics and Conditions of Coal–Water Fuel Droplets

G. V. Kuznetsov, V. V. Salomatov, S. V. Syrodoi

The Butakov Research Center

Research output: Contribution to journal › Article

Abstract

This paper presents a theoretical study of the thermal preparation and ignition of a coal–water fuel droplet under intense radiative-convective heating with diffusion of gaseous pyrolysis products of the solid fuel into the ambient gaseous medium. It has been found that gaseous pyrolysis products are ignited at a distance from the heating surface approximately equal to the radius of the droplet, after which the coke of the main fuel layer is ignited. The time between the ignition of volatiles and the coke residue is less than 0.5 s. Comparison of the ignition delays obtained by mathematical modeling and experimentally has shown satisfactory agreement between theoretical and experimental values.

Original language	English
Pages (from-to)	654-663
Number of pages	10
Journal	Combustion, Explosion and Shock Waves
Volume	54
Issue number	6
DOIs	https://doi.org/10.1134/S0010508218060047
Publication status	Published - 1 Nov 2018

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Keywords

coal–water fuel
coke ignition
diffusion of pyrolysis products
ignition of volatile

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Physics and Astronomy(all)

Cite this

Kuznetsov, G. V., Salomatov, V. V., & Syrodoi, S. V. (2018). Effect of Diffusion of Coal Pyrolysis Products on the Ignition Characteristics and Conditions of Coal–Water Fuel Droplets. Combustion, Explosion and Shock Waves, 54(6), 654-663. https://doi.org/10.1134/S0010508218060047

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AB - This paper presents a theoretical study of the thermal preparation and ignition of a coal–water fuel droplet under intense radiative-convective heating with diffusion of gaseous pyrolysis products of the solid fuel into the ambient gaseous medium. It has been found that gaseous pyrolysis products are ignited at a distance from the heating surface approximately equal to the radius of the droplet, after which the coke of the main fuel layer is ignited. The time between the ignition of volatiles and the coke residue is less than 0.5 s. Comparison of the ignition delays obtained by mathematical modeling and experimentally has shown satisfactory agreement between theoretical and experimental values.

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10.1134/S0010508218060047