Title of article
3-D Modeling of Heat and Mass Transfer during Combustion of Solid Fuel in Bkz-420-140-7C Combustion Chamber of Kazkhstan
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
Pages
11
From page
699
To page
709
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
Journal title
Astroparticle Physics
Record number
2407343
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