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Basic laws of the processes and the principle of minimum energy consumption during pneumatic transport and distribution of pulverized fuel in direct pulverized fuel preparation systems

  • Steam Boilers, Power Plant Fuel, Burner Arrangements, and Auxiliary Equipment of Boilers
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Abstract

The paper presents analysis of the basic laws and a calculation-based investigation of processes related to the low-concentration pneumatic transport and the distribution of finely dispersed pulverized fuel in direct pulverized fuel preparation systems of boiler units. Based on the principle of the minimum energy consumption, it is shown that, at high (standard) velocities of the turbulent gas flow—of 25–30 m/s, which is by 1.5–2 times higher than the critical speeds—the finely dispersed pulverized fuel can be transported simultaneously in the form of a low-concentration flow in pipelines and a concentrated, to 30% of the flow rate, thin layer on the pipeline walls with the height of the layer equal to 0.02–0.04 of the pipe radius. Consideration of this phenomenon is of great significance in terms of securing the efficient operation of pulverized fuel distribution units. The basic characteristics of the process have been determined and validated by test bench investigations using both model systems and pulverized fuel distribution systems of a number of power-generating units. The obtained results underlie a methodological approach to developing high-efficiency adjustable pulverized fuel distribution units. Also, results of industrial testing are presented that confirm the results of the analysis and of experimental studies.

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References

  1. A. S. Sukomel, F. F. Tsvetkov, and R. V. Kerimov, Heat Transfer and Hydraulic Friction with Gas Suspension Moving in Pipes (Energiya, Moscow, 1977) [in Russian].

    Google Scholar 

  2. L. I. Zaichik, Statistical Models Describing the Motion of Particles in a Turbulent Flow of Liquid (Fizmatlit, Moscow, 2006) [in Russian].

    Google Scholar 

  3. G. T. Levit, Coal Pulverization Processes at Thermal Power Plants (Energoatomizdat, Moscow, 1990) [in Russian].

    Google Scholar 

  4. Standard Materials on Calculation and Design of Coal Pulverization Installations for Boiler Units (TsKTI-VTI, Leningrad, 1971) [in Russian].

  5. V. M. Gendugov and G. P. Glazunov, Wind Erosion of Soil and Air Pollution with Dust (Fizmatlit, Moscow, 2007) [in Russian].

    Google Scholar 

  6. G. M. Ostrovskii, Pneumatic Transport of Bulk Materials in the Chemical Industry (Khimiya, Leningrad, 1984) [in Russian].

    Google Scholar 

  7. S. M. Zivi, “Estimation of steady-state steam voidfraction by means of the principle of minimum entropy production,” ASME J. Heat Transfer, Series C 86(2), 247–251 (1964).

    Article  Google Scholar 

  8. P. A. Andreev, N. S. Alferov, B. S. Fokin, and E. N. Gol’dverg, “The energy minimum principle in two-phase flows,” Trudy TsKTI, No. 139 (1976).

    Google Scholar 

  9. Yu. N. Kuznetsov, “Pneumatic transport: theory and practice,” in Trudy VNINT (Yekaterinburg, 2005).

    Google Scholar 

  10. I. M. Razumov, Pneumatic and Hydraulic Transport in the Chemical Industry (Khimiya, Moscow, 1979) [in Russian].

    Google Scholar 

  11. A. E. Smoldyrev, Hydraulic and Pneumatic Transport (Metallurgiya, Moscow, 1975) [in Russian].

    Google Scholar 

  12. V. Z. Leikin and N. S. Klepikov, “A dust-gas flow distribution device,” RF Patent No. 2456496, IPC F23K, Byul. Izobr., No. 20 (2012).

    Google Scholar 

  13. V. Z. Leikin, V. E. Maslov, P. M. Luzin, V. B. Galuskin, A. A. Smyshlyaev, V. D. Lebedev, and I. A. Pozin, “A dust-gas flow distribution device,” RF Inventor’s Certificate No. 716264, IPC F23K, Byul. Izobr., No. 8 (1992).

    Google Scholar 

  14. V. Z. Leikin, I. A. Pozin, K. V. Agapov, V. B. Galuskin, A. A. Smyshlyaev, V. A. Kondrov, M. Yu. Strakhov, and S. V. Ognishchenko, “Development of new designs of mixing-type dust-gas flow distribution devices and putting them in use at thermal power plants,” Elektr. Stn., No. 7, 10–23 (2008).

    Google Scholar 

  15. V. Z. Leikin, N. S. Klepikov, V. B. Galuskin, A. V. Gruznov, F. A. Serant, and V. V. Novik, “A convergent dust concentrator,” RF Patent No. 2437031, IPC F23K, Byul. Izobr., No. 35 (2011).

    Google Scholar 

  16. M. O. Gaseeva, A. R. Karivishvilli, and E. A. Mezhov, “Using the ANSYS FLUENT computer program for elaborating the design and operating modes of dust dividers and dust concentrators for 300–800 MW power units,” in Proceedings of the 8th Conference “Solid Fuel Combustion,” Kutateladze Inst. of Thermal Physics, Novosibirsk, 2012.

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Authors and Affiliations

  1. St. Petersburg Power Engineering Institute for Advanced Professional Training, ul. Aviatsionnaya 23, St. Petersburg, 196135, Russia

    V. Z. Leykin

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  1. V. Z. Leykin
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Correspondence to V. Z. Leykin.

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Original Russian Text © V.Z. Leykin, 2015, published in Teploenergetika.

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Leykin, V.Z. Basic laws of the processes and the principle of minimum energy consumption during pneumatic transport and distribution of pulverized fuel in direct pulverized fuel preparation systems. Therm. Eng. 62, 564–571 (2015). https://doi.org/10.1134/S0040601515080042

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  • DOI: https://doi.org/10.1134/S0040601515080042

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