PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Tytuł artykułu

Improving the efficiency of fluidized bed comminution of limestone samples

Autorzy
Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Purpose: The aim of the research was to describe the properties and methods of using limestone for desulfurization of flue gases and to analyse the process of fluidized bed comminution and the influence of selected parameters and stand modification on quality of product of fluidized bed comminution. Design/methodology/approach: Tests of the grinding process on the fluidized bed were carried out using a modified fluid bed mill for operational variable parameters and their results were compared with the results received before modification. The modification of the test stand consisted of increasing the height of the grinding chamber, which ensured an increase in the volume of the fluidized layer where the grinding process takes place. Findings: Main parameters that determined the effects of comminution in the analyzed case were: overpressure of working air and the rotor speed of the classifier. The introduction of the modifications of the test stand ensured an increase in the volume of the fluidized layer in which the grinding process takes place. As well as a greater gravitational classification, which caused larger grains to be stopped in the grinding chamber and shift of characteristics of grain compositions towards finer grains. Research limitations/implications: It is assumed that the diameter of sorbent grains used in the fluidized bed can not exceed 6 mm. The granularity of the offered sorbents ranges from 0.1 mm to 1.2 mm. The quality of the desulfurization process depends on the overall granulation of used sorbent grains. Practical implications: Appropriately selected sorbent grains used in wet and dry flue gas desulphurisation plants ensure improved efficiency of the desulphurisation process and lower operating costs of the installation. Originality/value: Thanks to the comminution method used, a sorbent is obtained without impurities and with an increased specific surface, which can be used in fluidized bed boilers.
Rocznik
Strony
5--14
Opis fizyczny
Bibliogr. 25 poz., rys., tab., wykr.
Twórcy
autor
  • Czestochowa University of Technology, 42-201 Częstochowa, Poland
Bibliografia
  • [1] S. Blaschke, Mechanical processing of minerals, Publishing House „Śląsk”, Katowice, 1984 (in Polish).
  • [2] D. Saramak, Improving the work efficiency of high-pressure roll presses, Surowce i Maszyny Budowlane 5/2010 (2010) 85-87 (in Polish).
  • [3] M. Gawlicki, K. Galos, J. Szlugaj, Waste mineral raw materials from power plants, combined heat and power plants and heating plants, in: K. Galosa (ed.), Mineral resources of Poland. Mineral waste raw materials, Publishing House IGSMiE PAN, Kraków, 2009 (in Polish).
  • [4] Product sheet. Dedicated lime sorbent for flue gas desulphurization for medium-power boilers with a circulating fluidized bed Fraction: 01-04 mm. Available from: https://egmsa.pl/product/sorbenty/ Access in: 01.05.2021.
  • [5] Z. Bis, Fluidized bed boilers. Theory and practice, Publishing house of the Czestochowa University of Technology, Częstochowa, 2010 (in Polish).
  • [6] J. Jarosiński, Clean combustion techniques, WNT, Warszawa, 1996 (in Polish).
  • [7] E. Krawczyk, M. Zajemska, T. Wyleciał, The chemical mechanism of SOx formation and elimination in coal combustion process, Chemik 67/10 (2013) 856-862 (in Polish).
  • [8] A. Szymanek, M. de las Obras-Loscertales, A. Pajdak, Effect of sorbent reactivity on flue gas desulphurization in fluidized-bed boilers under air firing mode. The Canadian Journal of Chemical Engineering 96/4 (2018) 895-902. DOI: https://doi.org/10.1002/cjce.23012
  • [9] A. Kochel, A. Cieplińska, A. Szymanek, Flue gas desulfurisation in oxygen-enriched atmospheres using modified limestone sorbents, Energy & Fuels 29/1 (2015) 331-336. DOI: https://doi.org/10.1021/ef5021439
  • [10] Product sheet - limestone, Czatkowice, 2019. Available from: https://www.czatkowice.pl/produkty/kruszywa-lamane/grysy Access in: 01.04.2021.
  • [11] E. Osiecka, Building Materials, Publishing House of the Warsaw University of Technology, Warszawa, 2003 (in Polish).
  • [12] Z. Drzymała, Research and basics of construction of special mills, PWN, Warszawa, 1992 (in Polish).
  • [13] J. Drzymała, Fundamentals of mineralurgy, Publishing House of the Wrocław University of Technology, Wrocław, 2009 (in Polish).
  • [14] I.M. Razumow, Fluidization and pneumatic transport of loose materials, WNT, Warszawa, 1975 (in Polish).
  • [15] A. Balasubramanian, Size Reduction by grinding methods, Technical Report, University of Mysore, Mysore, 2017.
  • [16] H. Anticoi, E. Guasch, J. Oliva, P. Alfonso, M. Bascompta, L. Sanmiquel, High-pressure grinding rolls: model validation and function parameters dependency on process conditions, Journal of Materials Research and Technology 8/6 (2019) 5476-5489. DOI: https://doi.org/10.1016/j.jmrt.2019.09.016
  • [17] S. Chehreh Chelgani, M. Parian, P. Semsari Parapari, Y. Ghorbani, J. Rosenkranz, A comparative study on the effects of dry and wet grinding on mineral flotation separation - a review, Journal of Materials Research and Technology 8/5 (2019) 5004-5011. DOI: https://doi.org/10.1016/j.jmrt.2019.07.053
  • [18] J. Krzywanski, D. Urbaniak, H. Otwinowski, T. Wylecial, M. Sosnowski, Fluidized Bed Jet Milling Process Optimized for Mass and Particle Size with a Fuzzy Logic Approach, Materials 13/15 (2020) 3303. DOI: https://doi.org/10.3390/ma13153303
  • [19] Jet Milling and Particle Classfication. Available from: https://www.fluidenergype.com/frequently-asked-questions-jet-milling-and-particle-classfication Access in: 21.08.2021.
  • [20] D. Tromans, Mineral comminution: Energy efficiency considerations. Minerals Engineering 21/8 (2008) 613-620. DOI: https://doi.org/10.1016/j.mineng.2007.12.003
  • [21] P. Basu, S.A. Fraser, Circulating Fluidized Bed Boilers. Design and Operations, Butterworth-Heinemann, USA, 1991. DOI: https://doi.org/10.1016/C2009-0-26182-4
  • [22] Z. Orzechowski, J. Prywer, Two-phase flows, Publishing House of the Lodz University of Technology, Łódź, 1991 (in Polish).
  • [23] J. Wojciechowski, Characteristics of a fluidized bed. Machine Course Laboratory and Energy Equipment, AGH WIMiR, Kraków, 2017 (in Polish).
  • [24] H.G. Merkus, Particle Size Measurements: Fundamentals, Practice, Quality, Springer Science+Business Media B.V., Dordrecht, 2009. DOI: https://doi.org/10.1007/978-1-4020-9016-5
  • [25] Electronic IPS particle size analyzer. Available from: https://kamika.pl/Analizator_IPS_UA Access in: 27.04.2021.
Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-e1e6e692-1a03-4696-bda8-bcb7241b3384
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.