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2012 | 33 | 1 | 43-51
Tytuł artykułu

Effective diffusivity of moisture in low rank coal during superheated steam drying at atmospheric pressure

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The effective diffusivity of water in brown coal of Bełchatów mine was experimentally determined. The experiments were performed in superheated steam at 200°C and atmospheric pressure using slightly compressed pellets of cylindrical shape. The drying and temperature curves of the sample were used to identify diffusivity. An inverse problem was formulated and solved by the finite element method for 3D axially symmetric cylindrical geometry of the sample. A satisfactory fit of the simulated curves to experimental results was obtained. The obtained dependence of effective diffusivity on moisture content and temperature may be used in designing lignite dryers.
Słowa kluczowe
EN
Wydawca

Rocznik
Tom
33
Numer
1
Strony
43-51
Opis fizyczny
Daty
wydano
2012-03-01
online
2012-03-06
Twórcy
  • Faculty of Process and Environmental Engineering, Technical University of Lodz, ul. Wólczańska 213, 90-924 Łódź, Poland
  • Faculty of Process and Environmental Engineering, Technical University of Lodz, ul. Wólczańska 213, 90-924 Łódź, Poland
  • Faculty of Process and Environmental Engineering, Technical University of Lodz, ul. Wólczańska 213, 90-924 Łódź, Poland
Bibliografia
  • Adamski R., 2008. The mechanism of moisture transport in the material dried with superheated steam. PhD thesis, Technical University of Lodz, Lodz (in Polish).
  • Allardice D. J., Chaffee A. L., Jackson W. R., Marshall M., 2004. Water in brown coal and its removal. In: Li C. Z. (Ed.), Advances in the Science of Victorian Brown Coal, Elsevier, 85-133.
  • Chen Z., Wu W., Agarwal P. K., 2000. Steam - drying of coal. Part1. Modeling the behavior of a single particle. Fuel, 79, 961-973. DOI: 10.1016/S0016-2361(99)00217-3.[Crossref]
  • Chen Z., Agarwal P. K., Agnew J. B., 2001. Steam drying of coal. Part 2. Modeling the operation of a fluidized bed drying unit. Fuel, 80, 209-223. DOI: 10.1016/S0016-2361(00)00081-8.[Crossref]
  • Heidenreich C. A., Yan H. M., Zhang D. K., 1999. Mathematical modeling of temperature response of low-rank coal particles during pyrolysis, Dev. Chem. Eng. Mineral Process., 7(5/6), 593-610.
  • Kasztelewicz Z., Kozioł K., 2007. Excavation potential of brown coal sector in Poland after year 2025. Polityka Energetyczna, 10, 2, 141-158 (in Polish).
  • Kudra T., Mujumdar A. S., 2009. Advanced drying technologies. 2nd edition, CRC Press, Boca Raton (FL).
  • Looi A. Y., Golonka K., Rhodes M., 2002. Drying kinetics of single porous particles in superheated steam under pressure. Chem. Eng. J., 87, 329-338. DOI: 10.1016/S1385-8947(01)00244-3.[Crossref]
  • Pakowski Z., Bartczak Z., Strumillo C., Stenstroem S., 1991. Evaluation of equations approximating thermodynamic and transport properties of water, steam and air for use in CAD of drying processes, Dry. Technol., 9, 753 - 773. DOI: 10.1080/07373939108916708.[Crossref]
  • Pakowski Z., 2000. dryPAK 3.6 Program for psychrometric and drying computations. Omnikon Ltd., Łódź, 176.
  • Pakowski Z., 2011. Design of superheated steam dryers. Wydawnictwo Politechniki Łódzkiej, Łodź (in Polish).
  • Pakowski Z., Adamski R., Kokocińska M., Kwapisz S., 2011. Generalized desorption equilibrium equation of lignite in a wide temperature and moisture content range. Fuel, 90, 3330-3335. DOI: 10.1016/j.fuel.2011.06.044.[Crossref][WoS]
  • Pakowski Z., Adamski R., 2011. On prediction of the drying rate in superheated steam drying process, Dry. Technol., 29, 13, 1492-1498. DOI: 10.1080/07373937.2011.576320.[Crossref]
  • Pikoń J., Mujumdar A. S., 2007. Drying of coal. In: Mujumdar A. S. (Ed.), Handbook of industrial drying, 3rd edition, CRC Press, Boca Raton (FL).
  • Ross D., Doguparthy S., Huynh D., McIntosh M., 2005. Pressurized flash drying of Yallourn lignite. Fuel, 84, 47-52. DOI: 10.1016/j.fuel.2004.08.006.[Crossref]
  • Zaporowski B., 2008. Analysis of generation costs of electricity. Polityka Energetyczna, 11, 531-542 (in Polish).
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_v10176-012-0004-3
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