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Features of Primary Fragmentation of Wood Biomass during Fast Heating and Devolatilization

  • STEAM BOILERS, POWER-PLANT FUELS, BURNER UNITS, AND BOILER AUXILIARY EQUIPMENT
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Abstract

Results are presented from experimental studies into primary fragmentation of wood particles during their fast heating and devolatilization. The experimental equipment and the study procedure are described. It has been demonstrated that the probability and intensity of primary fragmentation of wood particles increases with an increase in their initial size, process temperature, and the ratio of their longitudinal and transverse dimensions. The results of experimental studies suggest that the stresses arising from the pressure of volatiles and wood shrinkage control the primary fragmentation of wood particles. Based on the study into the microstructure of char fragments formed during primary fragmentation, assumptions were made about the mechanism of cracking and its dependence on the structure and shape of wood particles. As applied to wood biomass, it is proposed to use the ratio of the volatile yield to the specific volume of wood as a criterion of devolatilization resistance. Processing of experimental data has revealed that smaller specific volumes and, accordingly, higher devolatilization resistances facilitate primary fragmentation. An analysis of the obtained data enabled the authors to determine the main lines of further studies into the primary fragmentation of wood particles during combustion and gasification in fluidized and dense beds.

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REFERENCES

  1. G. A. Ryabov and D. S. Litun, “Using fluidized bed technology for effective firing and gasification of biomass,” in Renewable Energy: Towards Raising Energy and Economic Efficiencies: Proc. 1st Int. Forum (REENFOR-2013), Moscow, Oct. 22–23, 2013, Ed. by O. S. Popel’ (Ob’edin. Inst. Vys. Temp. Ross. Akad. Nauk, Moscow, 2013), pp. 306–309.

  2. G. A. Ryabov, D. S. Litun, E. A. Pitsukha, Yu. S. Teplitskii, and V. A. Borodulya, “Experience of firing various biomass types in Russia and Belarus,” Elektr. Stn., No. 9, 9–17 (2015).

  3. I. T. Lau, Char Particle Reaction and Attrition in Fluidized Bed Combustors: Modeling and Measurement: Technical Report (Canmet Energy Technology Centre, 1995). https://ruor.uottawa.ca/handle/10393/10129

  4. D. S. Litun, “Estimation method of ash entrainment and unburned carbon at biomass combustion in fluidized bed furnace,” Izv. Ross. Akad. Nauk, Energ., No. 5, 90–102 (2015).

  5. R. Chirone, A. Cammarota, M. D’Amore, and L. Massimilla, “Fragmentation and attrition in the fluidized combustion of a coal,” in Proc. 7th Int. Conf. on Fluidized Bed Combustion, Philadelphia, Penn., Oct. 25–27, 1982 (National Technical Information Service, Springfield, Va., 1983), Vol. 2, pp. 1023–1029.

  6. D. Dakic, G. Honing, and M. Valk, “Fragmentation and swelling of various coals during devolatilization in a fluid bed,” Fuel 68, 911–916 (1989). https://doi.org/10.1016/0016-2361(89)90129-4

    Article  Google Scholar 

  7. D. Dakic, G. Honing, and B. Grubor, “Mathematical simulation of coal fragmentation during devolatilization in fluidized bed,” Presented at IEA-AFBC Mathematical Modelling Meeting, Goteborg, Sweden, 1989.

  8. R. R. Shandran, J. N. Duqum, M. A. Perna, D. D. Sutherland, and D. R. Rowley, “Ranking fuels for utilitiy-scale AFBC application,” in Proc. 10th Int. Conf. on FBC, San Francisco, Calif., Apr. 30–May 3, 1989 (American Society of Mechanical Engineers, New York, 1989), Vol. 1, pp. 313–322.

  9. J. Peeler and H. Poynton, “Devolatilization of large coal particles under fluidized bed conditions,” Fuel 71, 425–430 (1992). https://doi.org/10.1016/0016-2361(92)90032-J

    Article  Google Scholar 

  10. H. Zhang, K. Cen, J. Yan, and M. Ni, “The fragmentation of coal particles during combustion in a fluidized bed,” Fuel 81, 1835–1840 (2002).

    Article  Google Scholar 

  11. M. Kosowska-Galachowska and A. Luckos, “An experimental investigation into the fragmentation of coal particles in a fluidized-bed combustor,” in Proc. 20th Int. Conf. on Fluidized Bed Combustion, Beijing, China, May 18–21, 2009 (Tsinghua Univ. Press, Beijing, 2009), pp. 330–335.

  12. J. Bunt and F. Waanders, “An understanding of lump coal physical property behaviour (density and particle size effects) impacting on a commercial-scale Sasol–Lurgi FBDB gasifier,” Fuel 87, 2856–2865 (2008). https://doi.org/10.1016/J.FUEL.2008.03.022

    Article  Google Scholar 

  13. D. S. Litun and G. A. Ryabov, “Modern state and topical issues of studying solid fuel particle primary fragmentation processes as applied to biomass combustion and gasification in fluidized and dense bed (review),” Therm. Eng. 65, 875–884 (2018). https://doi.org/10.1134/S0040601518120042

    Article  Google Scholar 

  14. C. J. Badenhorst, Primary Fragmentation of Large Coal Particles, Magister’s Dissertation in Chemical Engineering (Potchefstroom Campus, South Africa North-West Univ., 2016). http://dspace.nwu.ac.za/ bitstream/handle/10394/17838/Badenhorst_CJ_2016. pdf?sequence= 1&isAllowed=y

  15. K. K. Pillai, “The influence of coal type on devolatilization and combustion in fluidized beds,” J. Inst. Energy 54, 142–150 (1981).

    Google Scholar 

  16. K. K. Pillai, “A schematic for coal devolatilization in fluidized bed combustors,” J. Inst. Energy 424, 132–133 (1982).

    Google Scholar 

  17. J. Yates, M. MacGillivar, and D. Cheesman, “Coal devolatilization in fluidized bed combustors,” Chem. Eng. Sci. 11, 2360–2361 (1980). https://doi.org/10.1016/0009-2509(80)87019-9

    Article  Google Scholar 

  18. W. Prins, R. Siemons, and W. P. M. Van Swaaij, “Devolatilization and ignition of coal particles in a two-dimensional fluidized bed,” Combust. Flame 75, 57–79 (1989). https://doi.org/10.1016/0010-2180(89)90087-4

    Article  Google Scholar 

  19. S. N. Oka, Fluidized Bed Combustion (Marcel Dekker, New York, 2004).

    Google Scholar 

  20. M. Radovanović, Fluidized Bed Combustion (Hemisphere, Washington, DC, 1986; Energoatomizdat, Moscow, 1990).

  21. D. Litoun, G. Ryabov, and A. Pchelincev, “Fragmentation of biomass particles in fixed and fluidized bed combustion and gasification,” J. Phys.: Conf. Ser. 1261, 012021 (2019). https://doi.org/10.1088/1742-6596/1261/1/012021

    Article  Google Scholar 

  22. GOST 32975.2-2014. Solid Biofuel. Determination of Moisture Content by Drying. Part 2. Total Moisture. Simplified Method (Standartinform, Moscow, 2015).

  23. GOST 32975.3-14. Solid Biofuel. Determination of Moisture Content by Drying. Part 3. Moisture in General Analysis Sample (Standartinform, Moscow, 2019).

  24. GOST R 56881-2016. Biomass. Determination of the Ash Content by Standard Method (Standartinform, Moscow, 2016).

  25. GOST 32990-2014. Solid Biofuel. Determination of the Content of Volatile Matters (Standartinform, Moscow, 2015).

  26. M. Sreekanth, “Primary fragmentation of wood in a fluidized bed combustor — An experimental investigation,” Int. J. Innovative Sci. Res. 9, 502–510 (2014).

    Google Scholar 

  27. V. M. Nikitina, A. V. Obolenskaya, and V. P. Shchegolev, Chemistry of Wood and Cellulose (Lesnaya Promyshlennost’, Moscow, 1978) [in Russian].

    Google Scholar 

  28. A. M. Borovikov and B. N. Ugolev, Wood Handbook, Ed. by B. N. Ugolev (Lesn. Prom-st., Moscow, 1989) [in Russian].

    Google Scholar 

  29. G. I. Pal’chenok, O. S. Rabinovich, O. P. Khorol’skaya, S. V. Vasilevich, V. A. Borodulya, B. Lekkner, Ya. E. Iokhansson, and K. Tullin, “Dynamics of changes in the characteristics of natural and granulated wood particles in thermochemical fluidized bed conversion,” in Proc. 6th Minsk Int. Forum on Heat and Mass Transfer, Minsk, Belarus, May 19–23, 2008 (Inst. Teplo- i Massoobmena im. A. V. Lykova, Minsk, 2008). https://www.itmo.by/ conferences/abstracts/?ELEMENT_ID=4833/

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ACKNOWLEDGEMENTS

The studies were carried out at the Center for the Collective Use of Scientific Equipment “Center for Research on New Generation of Materials for Thermal Power Engineering.”

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Authors and Affiliations

  1. JSC All-Russia Thermal Engineering Institute (VTI), 115280, Moscow, Russia

    D. S. Litun, G. A. Ryabov & E. A. Shorina

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  1. D. S. Litun
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  2. G. A. Ryabov
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  3. E. A. Shorina
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Correspondence to D. S. Litun.

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Translated by T. Krasnoshchekova

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Litun, D.S., Ryabov, G.A. & Shorina, E.A. Features of Primary Fragmentation of Wood Biomass during Fast Heating and Devolatilization. Therm. Eng. 69, 523–534 (2022). https://doi.org/10.1134/S0040601522070035

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