Abstract <p>This paper presents an experimental study of the ignition and combustion of coal–water slurry fuel (CWSF) droplets in a high-temperature oxidizing environment at <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(700{-} 900\)</EquationSource> <!--CESW2670008Glushkov-m1--> </InlineEquation>°C. The effect of adding waste motor oil as a component of CWSF and as a feedstock for generating syngas to be fed into the CWSF combustion zone is investigated. The feasibility of co-combustion of CWSF with syngas has been experimentally confirmed. The gas-phase ignition delay of CWSF droplets with the addition of syngas to the combustion zone is <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(1.1{-} 1.2\)</EquationSource> <!--CESW2670008Glushkov-m2--> </InlineEquation> times shorter compared to CWSF combustion without adding syngas. Under these conditions, the heterogeneous ignition delay is reduced by a factor of <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(1.3{-} 1.7\)</EquationSource> <!--CESW2670008Glushkov-m3--> </InlineEquation> and the combustion duration is shortened by a factor of <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(1.2{-} 1.5\)</EquationSource> <!--CESW2670008Glushkov-m4--> </InlineEquation>. The use of waste oil as a component of CWSF provides a significant improvement in energy performance, which, combined with the increased combustion temperatures, makes this strategy the most attractive for practical implementation.</p>

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Enhancement of Ignition and Combustion of Coal–Water Slurry Fuels

  • D. O. Glushkov,
  • K. K. Paushkina

摘要

Abstract

This paper presents an experimental study of the ignition and combustion of coal–water slurry fuel (CWSF) droplets in a high-temperature oxidizing environment at \(700{-} 900\) °C. The effect of adding waste motor oil as a component of CWSF and as a feedstock for generating syngas to be fed into the CWSF combustion zone is investigated. The feasibility of co-combustion of CWSF with syngas has been experimentally confirmed. The gas-phase ignition delay of CWSF droplets with the addition of syngas to the combustion zone is \(1.1{-} 1.2\) times shorter compared to CWSF combustion without adding syngas. Under these conditions, the heterogeneous ignition delay is reduced by a factor of \(1.3{-} 1.7\) and the combustion duration is shortened by a factor of \(1.2{-} 1.5\) . The use of waste oil as a component of CWSF provides a significant improvement in energy performance, which, combined with the increased combustion temperatures, makes this strategy the most attractive for practical implementation.