Author/Authors :
Askarova, A Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Bekmukhamet, A Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Bolegenova, S Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Ospanova, S Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Symbat, B Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Maximov, V Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Beketayeva, M Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan , Ergalieva, A Thermal and Technical Physics Department - Al-Farabi Kazakh National University, Almaty, Kazakhstan
Abstract :
In this paper the results obtained by the numerical method of modeling of Ekibastuz coal burning in BKZ-420
combustion chamber of Kazakhstan Power Plant are presented. They are devoted to the numerical simulation
of combustion processes in the furnace boiler BKZ-420. Boiler’s steam generates capacity equal 420 T/h.
Boiler has six vertical pulverized coal burners arranged in two levels with three burners on the front wall of
the boiler. High ash, low-grade coal from Ekibastuz burned in the furnace. Its ash content is 40%, volatile –
24%, humidity–5%, highest calorific value is 16750 kJ/kg. Milling dispersity of coal was equal to R90 =
15%.It was shown in this research that the most intense burning is observed in the central part of the chamber
where the flow temperature reaches about 980 °C and it is seen that the temperature reaches a peak in the
cross sections of the burners location. The combustion reaction there occurs more intensively.
Keywords :
BKZ-420 , Combustion , Ekibastuz coal , Heat and mass transfer , Modeling , Pulverized coal , Turbulence , Two–phase flow
