THERMAL SCIENCE

International Scientific Journal

INVESTIGATION OF THE SPRAYING MECHANISM AND COMBUSTION OF THE SUSPENDED COAL FUEL

ABSTRACT
This paper continues the earlier one [1]. It presents the results of the suspended coal fuel spraying with pneumo-mechanical sprayers followed by the fuel combustion in a vortex furnace. It is shown that, during the spraying, two qualitatively different systems of drops are forming. The first one with the “drops” diameter above 80 - 100 mm is presented by coal particles, the other - by water-coal drops. Different dynamics of temperature variation of the coal particle and WCF drops during their combustion is founded. The residence time of the burning particles and WCF drops in the vortex furnace is proportional to their diameter, which permits to provide their effective burn-off.
KEYWORDS
PAPER SUBMITTED: 2012-06-18
PAPER REVISED: 2013-03-11
PAPER ACCEPTED: 2014-07-21
PUBLISHED ONLINE: 2014-09-06
DOI REFERENCE: https://doi.org/10.2298/TSCI120618095M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE 1, PAGES [243 - 245]
REFERENCES
  1. Zasypkin, I.Ì., Murko, V.I., Baranova, Ì.P., Fedyaev V.I. Systems of ignition and combustion stabilization for water-coal fuel. THERMAL SCIENCE: Year 2012, Vol. 16, No. 4, pp. 1229-1238.
  2. Murko, V.I., Scientific foundation of the production and effective utilization of water-coal suspensions: Post-doctoral thesis, Moscow Institute of Mining, Moscow: 1999, 48 p.
  3. Murko, V.I. Water-coal fuel, Coal, 6 (2002), pp. 58 - 59.
  4. Delyagin, G.N., Smetannikov B.N., The burning of coarse water-coal suspensions in cyclone furnaces, Nauka, Moscow, USSR, 1967.
  5. Nekrasov, V.G. Research of processes of atomization of water-coal suspensions and nozzles for burning: Ph.D. thesis, Alma-Ata, 1972, 20 p.
  6. Thambimuthu, K. V. The mechanism of atomization of coal-water mixtures, Proceeding (K. V. Thambimuthu, N. S. Stover N, H. Whaley), Third European conference on coal liquid mixtures, Malmo, Sweden, October 14 - 15, 1987. IChemE Symposium series number 107, Rugby, UK, The Institution of Chemical Engineers, pp. 133 - 149.
  7. Thambimuthu, K. V., Combustion of coal-liquid mixtures, in: Principles of combustion engineering for boilers, (Ed. C.J. Lawn), Harcourt Brace Jovanovich, London, UK, 1987, pp. 337 - 449.
  8. Delyagin, G.N., Combustion of water-coal suspensions - the method of utilization of water-cut solid fuels: Post-doctoral thesis, Moscow Institute of Mining, Moscow: 1971.
  9. Khzmalyan, D.Ì., The theory of furnace processes, Energoatomizdat, Moscow, USSR, 1990.
  10. Korsunov, Yu. À., Experimental research of liquid drop pulverization at low Reynolds numbers, Liquid and Gas Mechanics, No. 2 (1971), pp. 182 - 186.
  11. H. Green, Aerosols: dusts, fumes, and fogs, Leningrad, USSR, 1969.
  12. Puzyrev, Å.Ì., Murko, V.I. et al, Results of experimental and industrial tests of the boiler DKVR 6,5/13 on water-coal fuel, Heat Power Engineering, 2 (2001), pp. 69 - 71.
  13. Murko V.I., Fedyaev V.I., Karpenok V.I., Development and production of the technological complex for fine waste coal combustion in the boiler-house of OAO "Mezhdurechje", Kuzbass Coal, 4 (2010), pp. 102 - 103.
  14. Murko, V.I., Puzyrev Å.Ì. Vortex chamber furnace. Patent 45807 RU UI F23 c 5/24 2005100095/22. Appl. 11.01.2005. Published on 27.05.2005. Bulletin No 15, p.57.
  15. A vortex furnace. Utility Model Patent No 37183 RU 7 F 23 C 5/24, 1/02. 25.11.202
  16. Murko, V.I., Demonstration experimental and industrial plant for the preparation, transportation, storage, and combustion of the composite water-coal fuel, Kuzbass Coal, 10 (2003), pp. 20.

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence