Advertisement

Thermophysics and Aeromechanics

, Volume 25, Issue 5, pp 773–788 | Cite as

Influence of the degree of coal metamorphism on characteristics and conditions of ignition of coal-water fuel drops

  • V. V. SalomatovEmail author
  • G. V. Kuznetsov
  • S. V. Syrodoy
Article
  • 7 Downloads

Abstract

The results of theoretical studies of the processes of ignition of water-coal fuel droplets based on brown coal, semi-anthracite, anthracite, long-flame and fat coal under the conditions corresponding to the combustion spaces of typical modern boilers are presented. The influence of the degree of metamorphism (structural-molecular transformation of organic matter of coal) and concentration of the organic component of the base fuel (coal) on the conditions of ignition of water-coal fuel particles is analyzed. It is determined that the type and grade of coal have a significant impact on the dynamics of fuel ignition. It was shown that in the case of ignition of coal-water fuel made of mineral coal, the ignition of particles based on semi-anthracite and anthracite is the fastest (by 20%), and ignition of coal-water fuels of fat coal is the slowest. The latter is explained by the lower heat capacity and thermal effect of pyrolysis of this fuel, as well as the relatively high heat conductivity of anthracite coal as compared to fat coal. It has been determined that drops of coal-water fuel made of brown coal ignite substantially (2 times) faster than drops prepared from coal of coal-water particles. This is due to the high content of volatiles in the composition of brown coal.

Comparative analysis of the main characteristics of the process: ignition delay times (tign) obtained by mathematical modeling and experiments showed a satisfactory agreement between the theoretical and experimental values of tign.

Key words

coal-water fuel degree of coal metamorphism grade of coal ignition of coke ignition of volatiles diffusion of pyrolysis products 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J.P. Longwell, E.S. Rubin, and J. Wilson, Coal: energy for the future, Prog. in Energy and Combust. Sci., 1995, Vol. 21, No. 4, P. 269–360.CrossRefGoogle Scholar
  2. 2.
    D. Zheng and M. Shi, Multiple environmental policies and pollution haven hypothesis: evidence from China's polluting industries, J. Cleaner Produc., 2017, Vol. 141, P. 295–304.CrossRefGoogle Scholar
  3. 3.
    A. Wang and B. Lin, Assessing CO2 emissions in China’s commercial sector: determinants and reduction strategies, J. Cleaner Product., 2017, Vol. 164, P. 1542–1552.CrossRefGoogle Scholar
  4. 4.
    V.V. Salomatov, The state and prospects of coal and nuclear power generation (review), Thermophysics and Aeromechanics, 2009, Vol. 16, No. 4, P. 501–513.ADSCrossRefGoogle Scholar
  5. 5.
    A. Orlov, Distributional effects of higher natural gas prices in Russia, Energy Policy, 2017, Vol. 109, P. 590–600.CrossRefGoogle Scholar
  6. 6.
    X. Dong, G. Pi, Zh.W. Ma, and C. Dong, The reform of the natural gas industry in the PR of China, Renewable and Sustainable Energy Reviews, 2017, Vol. 73, P. 582–593.CrossRefGoogle Scholar
  7. 7.
    F.A. Campos, N.F. Silva, M.G. Pereir, and M.A.V. Freitas, A review of Brazilian natural gas industry: challenges and strategies, Renewable and Sustainable Energy Reviews, 2017, Vol. 75, P. 1207–1216.CrossRefGoogle Scholar
  8. 8.
    A. Kijo-Kleczkowska, Combustion of coal–water suspensions, Fuel, 2011, Vol. 90, Iss. 2, P. 865–877.CrossRefGoogle Scholar
  9. 9.
    W. Gajewski, A. Kijo-Kleczkowska, and J. Leszczyn, Analysis of cyclic combustion of solid fuels, Fuel, 2009, Vol. 88, P. 221–234.CrossRefGoogle Scholar
  10. 10.
    R.H. Essenhigh, K.M. Mahendra, and D.W. Shaw, Ignition of coal particles: a review, Combust. Flame, 1989, Vol. 77, No. 1, P. 3–30.CrossRefGoogle Scholar
  11. 11.
    M. Muto, K. Yuasa, and R. Kurose, Numerical simulation of ignition in pulverized coal combustion with detailed chemical reaction mechanism, Fuel, 2017, V. 190, P. 136–144.CrossRefGoogle Scholar
  12. 12.
    Z. Huang, C. Qin, and J. Gao, Theoretical analysis on CWM drop combustion history, Proc. 8th Int. Symp. Coal Slurry Fuels Preparation and Utilization, USA, Orlando, Part 1, 1986, P. 343–358.Google Scholar
  13. 13.
    K.J. Matthews and A.R. Jones, The effect of coal composition on coal-water slurry combustion and ash deposition characteristics, Proc. 8th Int. Symp. Coal Slurry Fuels Preparation and Utilization, USA, Orlando, Part 1, 1986, P. 388–407.Google Scholar
  14. 14.
    V.V. Salomatov, S.V. Syrodoy, and N.Y. Gutareva, Modelling of heat and mass transfer to solve the problem of particle ignition water-coal fuel, IOP Conf. Series: Materials Science and Engng, 2014, Vol. 66, P. 012040–1–012040–6.CrossRefGoogle Scholar
  15. 15.
    V.V. Salomatov and I.V. Kravchenko, Theoretical investigation of combustion of a drop of coal-water fuel, Part I, Heating stage, Gorenie i Plazmokhimiya, 2007, Vol. 5, No. 3, P. 178–188.Google Scholar
  16. 16.
    G.V. Kuznetsov, V.V. Salomatov, and S.V. Syrodoy, Numerical simulation of ignition of particles of a coal–water fuel, Combustion, Explosion and Shock Waves, 2015, Vol. 51, No. 4, P. 409–415.CrossRefGoogle Scholar
  17. 17.
    G.V. Kuznetsov, V.V. Salomatov, and S.V. Syrodoy, The influence of heat transfer conditions on the parameters characterizing the ignition of coal-water fuel particles, Thermal Engineering, 2015, No. 10, P. 703–707.Google Scholar
  18. 18.
    S.V. Syrodoy, G.V. Kuznetsov, and V.V. Salomatov, Effect of the shape of particles on the characteristics of the ignition of coal-water fuel, Solid Fuel Chemistry, 2015, V. 49, No. 6, P. 365–371.CrossRefGoogle Scholar
  19. 19.
    V.V. Salomatov, S.V. Syrodoy, and N.Yu. Gutareva, Concentration organic components in the hydrocarbon fuel particles conditions and characteristic of ignition, EPJ Web of Conferences, 2014, Vol. 76, P. 01018–1–01018-?.CrossRefGoogle Scholar
  20. 20.
    S.V. Syrodoy, G.V. Kuznetsov, A.V. Zhakharevich, N.Yu. Gutareva, and V.V. Salomatov, The influence of the structure heterogeneity on the characteristics and conditions of the coal-water fuel particles ignition in high temperature environment, Combust. and Flame, 2017, Vol. 80, P. 196–206.CrossRefGoogle Scholar
  21. 21.
    D.A. Frank-Kamenetskiy, Diffusion and Heat Transfer in Chemical Kinetics, AS USSR, Moscow, 1947.Google Scholar
  22. 22.
    D.B. Spalding, Some Fundamentals of Combustion, Butterworths, London, 1955.Google Scholar
  23. 23.
    Y.A. Kook, W.B. Seung, and E.C. Chang, Investigation of a coal-water slurry droplet exposed to hot gas stream, Combust. Sci. Technol., 2007, Vol. 97, No. 4, P. 429–448.Google Scholar
  24. 24.
    H. Hertz, On the evaporation of liquids, especially mercury, in vacuo, Annals of Physics, 1982, Vol. 17, No. 177, P.12.Google Scholar
  25. 25.
    V.I. Babiy, Coal-Dust Combustion and Calculation of Coal-Dust Flame, Energoatomizdat, Moscow, 1986.Google Scholar
  26. 26.
    A.A. Agroskin and V.B. Gleibman, Thermal Physics of Solid Fuel, Nedra, Moscow, 1980.Google Scholar
  27. 27.
    B.V. Kantorovich, Fundamentals of the Theory of Solid Fuel Combustion and Gasification, AS USSR, Moscow, 1958.Google Scholar
  28. 28.
    V.G. Lipovich, Chemistry and Processing of Coal, Khimiya, Moscow, 1988.Google Scholar
  29. 29.
    A.A. Khashchenko, O.V. Vecher, and E.I. Diskaeva, Study of temperature dependence of the rate of liquid evaporation from the free surface and rate of liquid boiling on a solid heating surface, Bull. Altai State University, 2016, Vol. 89, No. 1, P. 84–87.Google Scholar
  30. 30.
    G.N. Abramovich, Theory of Turbulent Jets, Fizmatgiz, Moscow, 1960.Google Scholar
  31. 31.
    Kh. Enkhjargal and V.V. Salomatov, Mathematical modeling of the heat treatment and combustion of a coal particle. V. Burn-up stage, J. Engng Phys. and Thermophys., 2011, Vol. 84, No. 4, P. 836–841.Google Scholar
  32. 32.
    V.I. Maksimov and T.A. Nagornova, Influence of heatsink from upper boundary on the industrial premises thermal conditions at gas infrared emitter operation, EPJ Web of Conferences, 2014, Vol. 76, P. 01006–1–01006-?.CrossRefGoogle Scholar
  33. 33.
    T.G. Shendrik, Y.V. Tamarkina, T.V. Khabarova, V.A. Kucherenko, N.V. Chesnokov, B.N. Kuznetsov, Formation of the pore structure of brown coal upon thermolysis with potassium hydroxide, Solid Fuel Chemistry, 2009, V. 43, No. 5, P. 309–313.CrossRefGoogle Scholar
  34. 34.
    A.A. Agroskin, Physical Properties of Coal, Metallurgizdat, Moscow, 1961.Google Scholar
  35. 35.
    Thermal Calculation of Boilers (Normative Method), 3rd. ed., NPO TsKTI, St. Petersburg, 1998.Google Scholar
  36. 36.
    V.V. Pomerantsev, Fundamentals of Practical Theory of Combustion, Energoatomizdat, Leningrad, 1986.Google Scholar
  37. 37.
    V.M. Gremyachkin, D. Förtsch, U. Schnell, and K.R.G. Hein, A model of the combustion of a porous carbon particle in oxygen, Combust. and Flame, 2002, Vol. 130, No. 3, P. 161–170.CrossRefGoogle Scholar
  38. 38.
    J. Mantzaras, Catalytic combustion of syngas, Combust. Sci. and Technology, 2008, Vol. 180, P. 1137–1168.CrossRefGoogle Scholar
  39. 39.
    W.C. Jian, J. Wen, S. Lu, and J. Guo, Single-step chemistry model and transport coefficient model for hydrogen combustion, Sci. China. Tech. Sci., 2012, Vol. 55, P. 2163–2168.CrossRefGoogle Scholar
  40. 40.
    X. Zhang, T. Wang, J. Xu, S. Zheng, and X. Hou, Study on flame-vortex interaction in a spark ignition engine fueled with methane/carbon dioxide gas, J. Energ. Inst., 2018, Vol. 91, P. 133–144.CrossRefGoogle Scholar
  41. 41.
    P.J. Roache, Computational Fluid Dynamics, Hermosa Publishers, Albuquerque, 1976.zbMATHGoogle Scholar
  42. 42.
    A.A. Samarskiy, Locally one-dimensional difference schemes on non-uniform grids, USSR Comp. Math. and Math. Phys., 1963, Vol. 3, No. 3, P. 431–466.MathSciNetGoogle Scholar
  43. 43.
    D.A. Frank-Kamenetskiy, Temperature distribution in the reaction vessel and stationary theory of thermal explosion, Rus. J. Phys. Chem. A, 1939, Vol. 13, No. 6, P. 738–755.Google Scholar
  44. 44.
    A.A. Samarskiy and B.D. Moiseenko, Efficient pass-through scheme of calculation for the multi-dimensional Stefan problem, USSR Comp.Math. Phys., 1965, Vol 5, No. 5, P. 816–827.Google Scholar
  45. 45.
    D.A. Frank-Kamenetskiy, To the diffusion theory of heterogeneous reactions, Rus. J. Phys. Chem. A, 1939, Vol. 13, No. 6, P. 756–758.Google Scholar
  46. 46.
    O.M. Todes, Theory of thermal explosion. I. Thermal explosion of “zero”-order reaction, Rus. J. Phys. Chem. A, 1939, Vol. 13, No. 7, P. 868–879.Google Scholar

Copyright information

© Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences 2018

Authors and Affiliations

  • V. V. Salomatov
    • 1
    Email author
  • G. V. Kuznetsov
    • 2
  • S. V. Syrodoy
    • 2
  1. 1.Kutateladze Institute of Thermophysics SB RASNovosibirskRussia
  2. 2.National Research Tomsk Polytechnic UniversityTomskRussia

Personalised recommendations