Abstract
Experimental research of conditions and characteristics of ignition of the pulverized coal (with a particle size of approximately 80 μm) of different-type brown coals (1B, 2B, and 3B) during convective heating by a heated airflow (at a temperature of 425–600°С and velocity of 1–5 m/s) is carried out. The use of low-inertia thermocouples, a high-speed video camera, and dedicated software has made it possible to determine the minimum oxidizer parameters needed for coal dust ignition, and the approximation dependences of a main characteristic of the process under study―ignition delay time―on the air temperature. Results of experimental studies provide a basis for developing an optimal scheme of the boiler startup without heavy oil, which differs from the known schemes by the relatively low energy consumption for fuel-burning initiation. By example of the BKZ 75-39FB boiler, the economic usefulness of applying the boiler startup without heavy oil is shown. This scheme can be implemented using the proposed ignition burner that functions as a part of the direct system of pulverized-fuel preparation.
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References
Yu. A. Rundygin, E. E. Gil’de, A. V. Sudakov, V. M. Borovkov, Machine Industry: Encyclopedia, Vol. 4, Part 18: Boiler Units, Ed. by K. V. Frolov (Mashinostroenie, Moscow, 2009) [in Russian].
V. E. Zaidenvarg, K. N. Trubetskoi, and V. I. Murko, Production and Use of Water-Coal Fuel (Akad. Gornykh Nauk, Moscow, 2001) [in Russian].
D. A. Chebochakova, D. O. Glushkov, O. E. Lyakhovskaya, and S. V. Sukhanov “Ignition of coal dust from the Tomsk region Talovsky deposit by air flow,” MATEC Web Conf. 23, art. 01045 (2015).
D. O. Glushkov and O. V. Sharypov, “Ignition of a coal particle at the low temperature of gas flow,” EPJ Web Conf. 82, art. 01045 (2015).
R. S. Volkov, O. V. Vysokomornaya, G. V. Kuznetsov, and P. A. Strizhak, “Experimental determination of times, amplitudes, and lengths of cycles of water droplet deformation in air,” Tech. Phys. Lett. 41 (2), 128–131 (2015).
J. Janiszewski, “Measurement procedure of ring motion with the use of high speed camera during electromagnetic expansion,” Metrol. Meas. Syst. 19 (2), 797–804 (2012).
D. A. Frank-Kamenetskii, Fundamentals of Macrokinetics: Diffusion and Heat Transfer in Chemical Kinetics (Intellekt, Dolgoprudnyi, 2008) [in Russian].
V. I. Babii and Yu. F. Kuvaev, Combustion of Coal Dust and Calculation of the Dust-Coal Torch (Energoatomizdat, Moscow, 1986) [in Russian].
A. V. Zhuikov and Yu. V. Vidin, “Schemes of production, storage and transport of coal dust for oil-free kindling and lighting of boiler units,” Elektr. Stn., No. 4, 2–4 (2006).
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Original Russian Text © A.V. Zhuikov, V.A. Kulagin, M.P. Baranova, D.O. Glushkov, 2016, published in Teploenergetika.
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Zhuikov, A.V., Kulagin, V.A., Baranova, M.P. et al. Boiler startup under conditions of convective heating of the highly reactive coal dust. Therm. Eng. 63, 870–875 (2016). https://doi.org/10.1134/S0040601516120107
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DOI: https://doi.org/10.1134/S0040601516120107