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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)654-663
Number of pages10
JournalCombustion, Explosion and Shock Waves
Volume54
Issue number6
DOIs
Publication statusPublished - 1 Nov 2018

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)

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