International Scientific Journal


The paper examines the integral characteristics (minimum temperature, ignition delay times) of stable combustion initiation of organic coal-water fuel droplets (initial radius is 0.3-1.5 mm) in the oxidizer flow (the temperature and velocity varied in ranges 500-900 K, 0.5-3 m/s). The main components of organic coal-water fuel were: brown coal particles, filter-cakes obtained in coal processing, waste engine, and turbine oils. The different modes of soaring and ignition of organic coal-water fuel have been established. The conditions have been set under which it is possible to implement the sustainable soaring and ignition of organic coal-water fuel droplets. We have compared the ignition characteristics with those defined in the traditional approach (based on placing the droplets on a low-inertia thermocouple junction into the combustion chamber). The paper shows the scale of the influence of heat sink over the thermocouple junction on ignition inertia. An original technique for releasing organic coal-water fuel droplets to the combustion chamber was proposed and tested. The limitations of this technique and the prospects of experimental results for the optimization of energy equipment operation were also formulated.
PAPER REVISED: 2015-12-17
PAPER ACCEPTED: 2015-12-21
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THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 2, PAGES [1057 - 1066]
  1. Khodakov, G. S., et al., Coal-slurry fuel, Solid Fuel Chemistry, 39 (2005), 6, pp. 12-27.
  2. Khodakov, G. S. Coal-water suspensions in power engineering, Thermal Engineering, 54 (2007), 1, pp. 36-47.
  3. Lishtvan, I. I., et al., Fuel suspensions based on fuel oil, peat, waste wood, and charcoal, Solid Fuel Chemistry, 41 (2009), 1, pp. 1-4.
  4. Zasypkin, I. M., et al., Systems of ignition and combustion stabilization for water-coal fuel, Thermal science, 16 (2012), 4, pp. 1229-1238.
  5. Jianzhong, L., et al., Pilot-scale investigation on slurrying, combustion, and slagging characteristics of coal slurry fuel prepared using industrial waste liquid, Applied Energy, 115 (2014), pp. 309-319.
  6. Wilczyńska-Michalik, W., et al., Composition of coal combustion by-products: The importance of combustion technology, Fuel Processing Technology, 124 (2014), pp. 35-43.
  7. Wu, H., et al., Trace elements in co-combustion of solid recovered fuel and coal, Fuel Processing Technology, 105 (2013), pp. 212-21.
  8. Zhu, J., et al., Investigation on the rheological and stability characteristics of coal-water slurry with long side-chain polycarboxylate dispersant, Fuel Processing Technology, 118 (2014), pp. 187-91.
  9. Kontorovich, A. E., et al., Long-term and medium-term scenarios and factors in world energy perspectives for the 21st century, Russian Geology and Geophysics, 55 (2014), 5-6, pp. 534-43.
  10. BP Statistical Review of World Energy, BP, London, England, 2015.
  11. He, Q., et al., The utilization of sewage sludge by blending with coal water slurry, Fuel, 159 (2015), pp. 40-44.
  12. Gajewski, W., et al., Analysis of cyclic combustion of solid fuels, Fuel, 88 (2009), 2, pp. 221-34.
  13. Kijo-Kleczkowska, A. Combustion of coal-water suspensions, Fuel, 90 (2011) 2, pp. 865-77.
  14. Wu, H., et al., Trace elements in co-combustion of solid recovered fuel and coal, Fuel Processing Technology, 105 (2013), pp. 212-21.
  15. Glushkov, D. O., et al., Influence of organic coal-water fuel composition on the characteristics of sustainable droplet ignition, Fuel Processing Technology, 143 (2016), pp. 60-68.
  16. Glushkov, D. O., et al., Hot surface ignition of a composite fuel droplet, Matec Web of Conference, 23 (2015), 01063, pp. 1-4.
  17. Burdukov, A. P., et al., Autothermal combustion of mechanically-activated micronized coal in a 5 MW pilot-scale combustor, Fuel, 122 (2014), pp. 103-111.
  18. Tavangar, S., et al., CFD simulation for secondary breakup of coal-water slurry drops using OpenFOAM, Fuel Processing Technology, 132 (2015), pp. 153-163.
  19. Kuznetsov, G. V., et al., Numerical simulation of ignition of particles of a coal-water fuel, Combustion, Explosion and Shock Waves, 51 (2015), 4, pp. 409-415.
  20. Murko, V. I., et al., Investigation of the spraying mechanism and combustion of the suspended coal fuel, Thermal Science, 19 (2015), 1, pp. 243-251.
  21. Glushkov, D. O., et al., Mathematical simulation of the ignition of coal particles in airflow, Solid Fuel Chemistry, 49 (2015), 2, pp. 73-79.
  22. Glushkov, D. O., et al., Numerical research of heat and mass transfer during low-temperature ignition of a coal particle, Thermal Science, 19 (2015), 1, pp. 285-294.
  23. Glushkov, D. O., et al., Low-Temperature Ignition of Coal Particles in an Airflow, Russian Journal of Physical Chemistry B, 9 (2015), 2, pp. 242-249.
  24. Kutateladze, S. S., Fundamentals of heat transfer, Acad. Press, New York, USA, 1963.

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