NUMERICAL SIMULATION OF NITROGEN OXIDE FORMATION IN DUST FURNACES
Ongar B. Beloev H. Iliev I. Ibrasheva A. Yegzekova A.
10 January 2022Scientific Route
EUREKA, Physics and Engineering
2022Issue 123 - 33 pp.
Even though natural sources of air pollution account for over 50% of sulphur compounds, 93% of nitrogen oxide which are the most dangerous artificial anthropogenic sources of air pollution and primarily associated with the combustion of fossil fuel. Coal-fired thermal power plants and industrial fuel-burning plants that emit large quantities of nitrogen oxides (NО and NО2), solids (ash, dust, soot), as well as carbon oxides, aldehydes, organic acids into the atmosphere pollute the environment in majority. In the present work, a mathematical model and a scheme for calculating the formation of nitrogen oxide has been developed. Also, the dependence of the rate of release of fuel nitrogen from coal particles at the initial stage of gasification and content of volatiles has been obtained. The main regularities of the formation of NOx at the initial section of the flame in the ignition zone of the swirl burner flame during the combustion of Ekibastuz coal have been revealed. Modern environmental requirements for the modernization of existing and the creation of new heat and power facilities determine the exceptional relevance of the development of effective methods and constructions to reduce emissions of nitrogen oxides, sulfur oxides and ash to 200, 300, and 100 mg/nm3 at a = 1.4. The dust consumption in all experiments was kept constant and amounted to 0.042 g/s, as well as with the results of calculating the thermal decomposition of the Ekibastuz coal dust, the recombination of atomic nitrogen into nitrogen molecules, and the kinetics of the formation of fuel nitric oxide. It was found that despite the presence of oxygen in Ekibastuz coal for gases Odaf = 11.8% in an inert atmosphere, nitrogen oxides are not formed.
Atomic nitrogen , Burner , Coal particles , Molecular nitrogen , Nitrogen oxides
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Department of Power Engineering, Department of Thermal Physics and Technical Physics Al-Farabi Kazakh National University, 71 Al-Farabi ave, Almaty, 050040, Kazakhstan
Department of Thermotechnics, Hydraulics and Environmental Engineering, Kazakhstan
Department of Automation and Control, Satbayev University, 22a Satbayev str, Almaty, 050013, Kazakhstan
Department of Power Engineering, Academy of Logistics and Transport, 97 Shevchenko str, Almaty, 050012, Kazakhstan
University of Ruse, 8 Studentska str, Ruse, 7017, Bulgaria
Department of Power Engineering
Department of Thermotechnics
Department of Automation and Control
Department of Power Engineering
University of Ruse
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