Experimental Determination of the Impact Pressing Pressure of Wood Pellet on the Young's Modulus

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UDС

620.9:662.818.6

DOI:

10.17238/issn0536-1036.2015.3.69

Abstract

In a number of works on analytical definition of mathematical model of pressing process of a wood pellet in cylindrical channels of a matrix it is shown that on the size of final density and, respectively, quality of the pressed pellet has essential impact the Young's modulus of the pressed wood pellets. In references there are limited data on the Young's modulus for the impregnated gluing material of the crushed wood particles which are used for production of wood-shaving and fiber boards. At the same time there are no reliable data about the Young's modulus for the pressed wood sawdust without the gluing material. For completion of data on the Young's modulus for the pressed wood furnace charge experimental installation on the basis of a manual press was created. For the basic scheme of carrying out experiments the scheme of a wood granule compression in single cylindrical the matrix die was chosen. Techniques on carrying out experiences and processing of experimental data were developed. Experimental measurements of the Young's modulus for wood furnace charge were executed from a birch, a fir-tree and a pine of three fractional structures at change of pressure of furnace charge pressing from 10 to 60 MPa. Processing of results of pilot studies showed: the Young's modulus of wood pellets linearly grows with increase in pressure of pressing; breed of wood of which wood furnace charge is made, has essential impact on the Young's modulus of the pressed pellet, the density of wood of whichfurnace charge is made is less, the Young's modulus of the pellet pressed from is lower; influence of fractional composition of furnace charge on the Young's modulus has the return character – the smaller fractional structure, the Young's modulus of the pressed pellet is higher; if for whole wood Young's modulus on compression is in limits of 12 GPa for longitudinal compression and about 2 GPa at cross compression, in the pressed whole wood furnace charge with working pressure in the press granulator hesitates ranging from 600 MPa to 2000 MPa, that is it is less, than at whole wood at cross compression.

Authors

O.D. Myuller, Candidate of Engineering, Associate Professor V.I. Melehov, Doctor of Engineering, Professor G.L. Gerasimchuk, Postgraduate Student N.M. Klyushin, Senior Lecturer T.V. Tyurikova, Postgraduate Student

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, 163002 Arkhangelsk, Russia; e-mail: ockar@mail.ru

Keywords

wood waste, sawdust, Young's modulus, the pressing pressure, wood pellets, pelleting press, the matrix, die.

References

1. Bulatov I.A. Razrabotka protsessa pressovogo granulirovaniya melkodispersnykh sred na primere mineral'nykh poroshkov i drevesnykh otkhodov:…avtoref. kand.diss. [The Development of Press Granulation Process of Fine-Dispersed Sphere for Example, Mineral Powders and Wood Waste:…Cand.Diss.Abs]. Moscow, 2012. 2. Myuller O.D., Malygin V.I., Lyubov V.K. Vliyanie parametrov tekhnolog-icheskogo oborudovaniya na kachestvennye pokazateli drevesnykh granul [Effect of Tech-nological Equipment Parameters on Wood Pellets Quality Factors]. Lesnoy zhurnal, 2012, no. 2, pp. 33–43. 3. Akintunde M.A. The effects of paper and palm kernel shell on mechanical proper-ties of sawdust briquettes. IOSR Journal of Mechanical and Civil Engineering, ISSN: 2278- 1684, 2012, vol. 4, iss. 4, pp. 11–16. 4. Carlos Salas-Bringas, Tore Filbakk, Geir Skjevrak, Odd-Ivar Lekang, Olav Hoibo and Reidar Barfod Schyuller. Compression rheology and physical quality of wood pellets pre-handled with four different conditions. Annual transaction of the Nordic Rheology Society, 2010, vol. 18, pp. 87–93. 5. Kuti O.A. Evaluation of composite sawdust briquettes as a high grade fuel for Domestic Cooking. Journal of Engineering and Engineering Technology, 2003, vol. 2, no. 2, pp. 109–115. 6. Puvaneswaran A.P., Hisham S., Kamil Sued M. Investigation on the mechanical characteristics of sawdust and chipwood filled epoxy. Journal of Mechanical Engineering and Technology, January-June 2011, vol. 3, no. 1, pp. 71–78.