A. Askarova - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
A. Bekmukhamet - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
S. Bolegenova - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
S. Ospanova - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
B. Symbat - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
V. Maximov - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
M. Beketayeva - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan
A. Ergalieva - Thermal and Technical Physics Department, Al-Farabi Kazakh National University, Almaty ۰۵۰۰۳۸, Kazakhstan

In this paper the results obtained by the numerical method of modeling of Ekibastuz coal burning in BKZ-۴۲۰ combustion chamber of Kazakhstan Power Plant are presented. They are devoted to the numerical simulation of combustion processes in the furnace boiler BKZ-۴۲۰. Boiler’s steam generates capacity equal ۴۲۰ 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 ۴۰%, volatile – ۲۴%, humidity–۵%, highest calorific value is ۱۶۷۵۰ kJ/kg. Milling dispersity of coal was equal to R۹۰ = ۱۵%.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 ۹۸۰ °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.

BKZ, ۴۲۰, Pulverized coal, combustion, Two–phase flow, Ekibastuz coal, Heat and mass transfer, Modeling, Turbulence