In the paper the problem of heavily-watered fuel combustion has been undertaken as the requirements of qualitative coals combusted in power stations have been growing. Coal mines that want to fulfill expectations of power engineers have been forced to extend and modernize the coal enrichment plants. This causes growing quantity of waste materials that arise during the process of wet coal enrichment containing smaller and smaller under-grains. In this situation the idea of combustion of transported waste materials, for example in a hydraulic way to the nearby power stations appears attractive because of a possible elimination of the necessary deep dehydration and drying as well as because of elimination of the finest coal fraction loss arising during discharging of silted water from coal wet cleaning plants. The paper presents experimental research results, analyzing the process of combustion of coal-water suspension depending on the process conditions. Combustion of coal-water suspensions in fluidized beds meets very well the difficult conditions, which should be obtained to use the examined fuel efficiently and ecologically. The suitable construction of the research stand enables recognition of the mechanism of coal-water suspension contact with the inert material, that affects the fluidized bed. The form of this contact determines conditions of heat and mass exchange, which influence the course of a combustion process. The specificity of coal-water fuel combustion in a fluidized bed changes mechanism and kinetics of the process.
Kijo-Kleczkowska A., 2008-2010. Mechanism of coal-water fuels co-combustion with biomass. Report of investigative project. No N N513 309935.
Kijo-Kleczkowska A., 2009. Analysis Combustion Process of Coal-Water Fuel. Archives of Mining Sciences, 54, 1, pp. 119-133.
Kijo-Kleczkowska A., 2010a. Research on destruction mechanism of drops and evolution of coal-water suspension in combustion process. Archives of Mining Sciences 55, nr 4, pp. 923-946.
Kijo-Kleczkowska A., 2010b. Analysis of the Co-Combustion Process of Coal-Water Slurries and Biomass. Archives of Mining Sciences 55, nr 3, pp. 487-500.
Kijo-Kleczkowska A., 2011a. Combustion of coal-water suspensions. Fuel 90, pp. 865-877.
Kijo-Kleczkowska A., 2011b. Analysis of cyclic combustion of coal-water suspension. Archives of Thermodynamics 32, pp. 45-75.
Kijo-Kleczkowska A., Gajewski W., Kosowska-Golachowska M., 2008. Mechanism and kinetics of the co-combustion process of coal-water slurries and biomass. Proceedings of ECOS, pp. 859-866, Cracow - Gliwice, Poland, June 24-27, 2008.
Kijo-Kleczkowska A., Otwinowski H., 2011. Analysis of the coal and biomass co-combustion in the water-slurries form. 38th International Conference of SSCHE, May 23-27, Tatranske Matliare, Slovakia, p. 176.
Pis J.J., Fuertes A.B., Artos V., Suarez A., Rubiera F., 1991. Attrition of coal ash particles in a fluidized bed. Powder Technology 66, pp. 41-46.
Polański Z., 1984. Planning of experiences in technics. PWN, Warsaw.
Ray Y.-Ch., Jiang T.-S., 1987. Particle attrition phenomena in a fluidized bed. Powder Technology 49, pp. 193-206.
Stubington J.F., Linjewile T.M., 1989. The effects of fragmentation on devolatilization of large coal particles. Fuel 68, pp. 155-160.