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 ، Aliya - Al-Farabi Kazakh National University , Bekmukhamet ، Aidyn - Al-Farabi Kazakh National University , Bolegenova ، Saltanat - Al-Farabi Kazakh National University , Ospanova ، Shynar - al-Farabi Kazakh National University , Symbat ، B. - Al-Farabi Kazakh National University , Maximov ، Valeriy - Al-Farabi Kazakh National University , Beketayeva ، Meruert - Al-Farabi Kazakh National University , Ergalieva ، A. - Al-Farabi Kazakh National University
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 :
Journal of Applied Fluid Mechanics
Journal title :
Journal of Applied Fluid Mechanics
