The study on the effect of selected parameters of coal on its mass loss during combustion in a two-phase flow of inert material

• Autorzy: Pełka P.
• Języki publikacji: EN

Abstrakty

EN

The inspiration behind this research is the attempt to explain the mechanism of the loss of the mass of coal particles during the process of their combustion in a circulating fluidized bed. The subject of research is related to various types of Polish bituminous and lignite coal. On the basis of research carried out up to now it is well known that the process of erosion plays a significant role in the process of burning coal by changing its mechanism, as well as generating additional loss of mass. The aim of this research is to define the impact of the basic parameters of coal, i.e.: volatile matter, fixed carbon, ash content, carbon content and additionally the Hardgrove grindability index on the erosive loss of mass of the burnt particles. The combustion process in a two-phase flow of inert material modelling the conditions of fast fluidization in the dilute upper zone of the combustion chamber has been carried out. Clear correlation of mass loss of the tested particles with chemical composition of coal especially with volatile matter and ash content have been observed. The impact of the Hardgrove grindability index on the process under analysis was not however noted.

Słowa kluczowe

EN

combustion; coal

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2011
• Tom: Vol. 31 nr 1-2
• Strony: 97--109
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Pełka P.

• Czestochowa Univesity of Technology, Deptartment of Thermal Machinery, Armii Krajowej 21, 42-201 Czestochowa, Poland,

Bibliografia

• [l] Massimilla L. and Salatino P. A theoretical approach to the characterization of carbon attrition in a fluidized bed combustor Chem. Engng Commun. 62, (1987), pp. 285.
• [2] Salatino P. and Massimilla L. A descriptive model of carbon attrition in the fluidized combustion of coal char Chem. Engng Sci. 40, (1985), pp. 1905.
• [3] Chirone R. Salatino P. and Massimilla L., Secondary fragmentation of char particles during combustion in a fluidized-bed. Combust. Flame 77, (1989), pp. 79.
• [4] Gajewski W, Kosowska M, A study of the fragmentation of coal particles during fluidized-bed combustion, in: Proc. Int. Conf. IFSA 2005, vol. 32, SAIMM, Johannesburg, (2005), pp. 201.
• [5] Pelka P. Analysis of a coal particle mass loss burning in flow of inert material. Combust Flame 156, (2009), PP. 1604.
• [6] Basu P., Fraser S.A., Circulating fluidized bed boilers., Butterworth-Heinemann, USA, (1991).
• [7] Chirone R., Massimilla L., Salatino P., Comminution of carbons in fluidized bed combustion. Prog. Energy Combust. Sci. 17, (1991), pp. 297-326.
• [8] Basu P., Combustion of coal in circulating fluidized-bed boilers: a review, Chem. Eng. Sci. 54, (1999), pp. 5547.
• [9] Pelka P.: Modeling of mass loss of char particle during combustion on flow of inert material. Fuel 90, 932-904, (2011).