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Sawdust as ignition intensifier of coal water slurries containing petrochemicals

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  • Vershinina, Ksenia Yu
  • Kuznetsov, Genii V.
  • Strizhak, Pavel A.

Abstract

The low reactivity of coal processing wastes (filter cakes), petroleum derivatives, oil sludge, oil-water emulsions, coal-water suspensions, as well as used fuel and industrial oils is the main barrier to their common use as main fuel on thermal power stations and a boiler plants. It leads to high energy consumption for heating the combustion chambers and subsequent firing. In this work, we suggest using sawdust as an additive to intensify the heating and ignition of coal water slurries containing petrochemicals (CWSP) prepared from coal and oil wastes. We show that adding even 10% sawdust lowers the threshold temperature of sustainable ignition by as much as 70–80 K. The more volatiles are in coal processing wastes, the more noticeable the contribution of sawdust to the intensity of CWSP ignition. The role of sawdust as an ignition intensifier is found to increase significantly with the rising CWSP droplet size and air temperature. Replacing the coal component (e.g., filter cake) of the CWSP composition by sawdust of the same mass leads to a negligible change in the calorific value of the fuel. At the same time, the anthropogenic emissions of nitrogen and sulfur oxides are reduced considerably.

Suggested Citation

  • Vershinina, Ksenia Yu & Kuznetsov, Genii V. & Strizhak, Pavel A., 2017. "Sawdust as ignition intensifier of coal water slurries containing petrochemicals," Energy, Elsevier, vol. 140(P1), pages 69-77.
    • Handle: RePEc:eee:energy:v:140:y:2017:i:p1:p:69-77
    DOI: 10.1016/j.energy.2017.08.108
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    References listed on IDEAS

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    1. Jianzhong, Liu & Ruikun, Wang & Jianfei, Xi & Junhu, Zhou & Kefa, Cen, 2014. "Pilot-scale investigation on slurrying, combustion, and slagging characteristics of coal slurry fuel prepared using industrial wasteliquid," Applied Energy, Elsevier, vol. 115(C), pages 309-319.
    2. Lior, Noam, 2008. "Energy resources and use: The present situation and possible paths to the future," Energy, Elsevier, vol. 33(6), pages 842-857.
    3. Lam, Su Shiung & Liew, Rock Keey & Jusoh, Ahmad & Chong, Cheng Tung & Ani, Farid Nasir & Chase, Howard A., 2016. "Progress in waste oil to sustainable energy, with emphasis on pyrolysis techniques," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 741-753.
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    1. Vershinina, K. Yu & Shlegel, N.E. & Strizhak, P.A., 2019. "Relative combustion efficiency of composite fuels based on of wood processing and oil production wastes," Energy, Elsevier, vol. 169(C), pages 18-28.
    2. Syrodoy, S.V. & Kuznetsov, G.V. & Gutareva, N.Y. & Purin, M.V., 2020. "Ignition of bio-water-coal fuel drops," Energy, Elsevier, vol. 203(C).
    3. Kuznetsov, G.V. & Malyshev, D. Yu & Kostoreva, Zh.A. & Syrodoy, S.V. & Gutareva, N. Yu., 2020. "The ignition of the bio water-coal fuel particles based on coals of different degree metamorphism," Energy, Elsevier, vol. 201(C).

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