The thermal fragmentation of coal in a bubbling fluidized bed

• Autorzy: Gajewski, W. , Kosowska-Golachowska, M.
• Języki publikacji: EN

Abstrakty

EN

The fragmentation of coal plays a significant role during combustion process in fluidized-bed boilers because it accelerates combustion and influences the particle size distribution in the fluidized bed. Results of experimental investigations of thermal fragmentation for ten different types of coals combusted in a bubbling fluidized bed are presented in the paper. The influences of properties of fuel on the fragmentation process were studied. Degrees of thermal shock fragmentation, primary and secondary fragmentation are also determined. Scanning electronic microscopy (SEM) was used to identify the structure of tested coals at different stages of combustion.

Słowa kluczowe

PL

eksplozja jądrowa; spalanie; węgiel; złoże fluidalne

EN

coal; combustion; fluidized bed; fragmentation

• Czasopismo: Archives of Thermodynamics
• Rocznik: 2007
• Tom: Vol. 28, no. 2
• Strony: 85-96
• Opis fizyczny: Bibliogr. 8 poz.,Rys, wykr., tab., wz.,

Twórcy

autor

Gajewski, W.

autor

Kosowska-Golachowska, M.

• Częstochowa University of Technology, Department of Boilers and Ther-modynamics, al. Armii Krajowej 19 C, 42-200 Częstochowa, Poland,

Bibliografia

• [1] CHIRONE L., MASSIMILLA L. AND SALATINO P.: Comminution of carbons in fluidized bed combustion, Prog. Energy Combust. Sci., 17 (1991), 297-326.
• [2] DAKIC D., GRUBOR B. AND OKA S.: Experimental results of primary coal fragmentation in fluidized bed for eight different coals - new interpretation of results, Proc. of 41th IAE Fluidized Bed Conversion Meeting, Italy, 2000.
• [3] GAJEWSKI W., KOSOWSKA M., OTWINOWSKI H.: Thermal fragmentation of coal particles, Powder Handling & Processing, Vol. 14, No. 3, 2002, 226-228.
• [4] GAJEWSKI W., KOSOWSKA M.: A study of the fragmentation of coal particles during fluidized-bed combustion, Industrial Fluidization South Africa, Johannesburg 2005, 201-209.
• [5] GAJEWSKI W., KOSOWSKA M.: Specificity of solid fuels burning in air and fluidized bed, Proc of Ten Intern. Symp. on Heat Transfer and Renewable Sources of Energy, Międzyzdroje 2004, 705-712.
• [6] KOSOWSKA M.: The thermal fragmentation of coal during combustion process, PhD Thesis, Częstochowa University of Technology, 2005.
• [7] LEE J.; Combustion and fragmentation characteristics of Korean anthracite, Proc. of the 16th Intern. Conf. on Fluidized Bed Combustion, USA, 2001, 1513-1521.
• [8] ZHANG H., CEN K., YAN J. AND NI M.: The fragmentation of coal particles during the coal combustion in a fluidized bed, Fuel, 81, (2002), 1835-1840.