Differences in the ignition characteristics of coal–water slurries and composite liquid fuel

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• 作者：K. Yu. Vershinina ; D. O. Glushkov ; G. V. Kuznetsov ; P. A. Strizhak
• 刊名：Solid Fuel Chemistry
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：50
• 期：2
• 页码：88-101
• 全文大小：2,236 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC
• ISSN：1934-8029
• 卷排序：50

文摘

The processes of the inert heating, ignition, and combustion of the drops of typical coal–water slurries and promising composite liquid fuel were experimentally studied with the use of high-speed (to 105 frame/s) video recording facilities. The particles of brown and black coals with of sizes 80–100 μm were used as the basic components of the coal–water slurries and composite liquid fuel. Spent automobile oil (from an internal combustion engine) was also added to the composite liquid fuel (relative mass concentration, 0–15%). The characteristic stages of the processes of the inert heating and evaporating of liquid components and the ignition and combustion of coal–water slurries and composite liquid fuel (the initial radii of drops varied from 0.5 to 2 mm) were established. The ignition delay and complete combustion times of the drops of fuel compositions were determined under changes of the temperature of an oxidizing agent (air) in a range from 600 to 900 K at fluid velocities from 0.5 to 5 m/s. Representative temperatures at the centers of coal–water slurry and composite liquid fuel drops were measured at all of the established stages of the combustion initiation process. The necessary and sufficient conditions for the steady ignition of the drops of the test fuel compositions were recognized.Original Russian Text © K.Yu. Vershinina, D.O. Glushkov, G.V. Kuznetsov, P.A. Strizhak, 2016, published in Khimiya Tverdogo Topliva, 2016, No. 2, pp. 21–33.