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Analysis of cyclic combustion of the coal-water suspension

Kijo-Kleczkowska A.

Archives of Thermodynamics

2011

Vol. 32, no. 1

45-75

Combustion technology of the coal-water suspension creates a number of new possibilities to organize the combustion process fulfilling contemporary requirements, e.g. in the environment protection. Therefore the in-depth analysis is necessary to examine the technical application of coal as a fuel in the form of suspension. The research undertakes the complex investigations of the continuous coal-water suspension as well as cyclic combustion. The cyclic nature of fuel combustion results from the movement of the loose material in the flow contour of the circulating fluidized bed (CFB): combustion chamber, cyclone and downcomer. The experimental results proved that the cyclic change of oxygen concentration around fuel, led to the vital change of both combustion mechanisms and combustion kinetics. The mathematical model of the process of fuel combustion has been presented. Its original concept is based on the allowance for cyclic changes of concentrations of oxygen around the fuel. It enables the prognosis for change of the surface and the centre temperatures as well as mass loss of the fuel during combustion in air, in the fluidized bed and during the cyclic combustion.

Research on destruction mechanism of drops and evolution of coal-water suspension in combustion process

Kijo-Kleczkowska A.

Archives of Mining Sciences

2010

Vol. 55, no 4

923-946

The research undertakes the complex research of the coal-water suspension combustion in air and in the fluidized beds which according to the author best fulfill the difficult conditions that should be completed in order to use the new "fuel" efficiently and ecologically. An important element of the research was the identification of coal-water suspension drops complex morphology and its evolution in the combustion process.

W pracy przedstawiono identyfikację złożonej morfologii suspensji węglowo-wodnej oraz jej ewolucję w procesie spalania. Ciekawym elementem badań była wizualizacja przebiegu procesu spalania paliwa w różnych warunkach procesu, prowadzonego w strumieniu powietrza oraz warstwie fluidalnej.