Numerical simulation of nitrogen oxide formation in dust furnaces
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
Belikov, S. E. (2006). Integrated development of methods for reducing emissions of nitrogen oxides from thermal power plants by optimization of the combustion process and methods of fuel combustion. Moscow, 282.
Ongar, B., Iliev, I., Smagulova, G., Mergalimova, A. (2020). Numerical Simulation of the Formation of Nitrogen Oxides in Pulverized Furnaces. Journal of Engineering Science and Technology Review, 171–175. Available at: http://www.jestr.org/downloads/SpecialIssue2020/fulltext36SE.pdf
Umyshev, D. R., Dostiyarov, A. M., Tyutebayeva, G. M. (2017). Experimental investigation of the management of NOx emissions and their dependence on different types of fuel supply. Espacios, 38 (24).
Umyshev, D., Iliev, I. (2020). Research of the Combustion Process in a Heat Generator with Ansys Fluent. 2020 7th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE). doi: https://doi.org/10.1109/eeae49144.2020.9279022
Al-Abbas, A. H., Naser, J., Dodds, D. (2011). CFD modelling of air-fired and oxy-fuel combustion of lignite in a 100KW furnace. Fuel, 90 (5), 1778–1795. doi: https://doi.org/10.1016/j.fuel.2011.01.014
Yang, J., Golovitchev, V. I., Redón Lurbe, P., López Sánchez, J. J. (2012). Chemical Kinetic Study of Nitrogen Oxides Formation Trends in Biodiesel Combustion. International Journal of Chemical Engineering, 2012, 1–22. doi: https://doi.org/10.1155/2012/898742
Chernetsky, M., Dekterev, A. (2011). Mathematical model of the processes of heat exchange and burning of pulverized coal in flaring. The physics of combustion and explosion, 3, 37–46.
Abildinova, S. K., Musabekov, R. A., Rasmukhametova, A. S., Ongar, B., Yessengabylov, I. Zh., Aldabergenova, А. О., Issayeva, G. B. (2018). The efficiency of district heating systems in conditions of joint use of heat pumps. News of the National Academy of Sciences of the Republic of Kazakhstan. Series of Geology and Technical Sciences, 4 (430), 201–207.
Mergalimova, A., Ongar, B., Georgiev, A., Каlieva, K., Abitaeva, R., Bissenbayev, P. (2021). Parameters of heat treatment of coal to obtain combustible volatile substances. Energy, 224, 120088. doi: https://doi.org/10.1016/j.energy.2021.120088
Zhitarenko, V., Bejan, V., Оstapenko, O. (2020). Adaptation of mathematical model of heat and energy characteristics of medium pressure boilers to real operating conditions. Technology Audit and Production Reserves, 4 (1 (54)), 23–30. doi: https://doi.org/10.15587/2706-5448.2020.210540
Enyakin, Yu. P., Usman, Yu. M., Vereshetin, V. A. (2001). Development and research of burners with a reduced yield of nitrogen oxides. Bulletin of the Academy of Industrial Ecology, 1, 53–62.
Habib, M. A., Elshafei, M., Dajani, M. (2008). Influence of combustion parameters on NOx production in an industrial boiler. Computers & Fluids, 37 (1), 12–23. doi: https://doi.org/10.1016/j.compfluid.2007.04.006
Shi, L., Fu, Z., Duan, X., Cheng, C., Shen, Y., Liu, B., Wang, R. (2016). Influence of combustion system retrofit on NOx formation characteristics in a 300 MW tangentially fired furnace. Applied Thermal Engineering, 98, 766–777. doi: https://doi.org/10.1016/j.applthermaleng.2015.12.026
Cardona Vargas, A., Arrieta, C. E., Tumay, H. A. Y., Echeverri-Uribe, C., Amell, A. (2021). Determination of laminar burning velocity of methane/air flames in sub atmospheric environments. EUREKA: Physics and Engineering, 4, 50–62. doi: https://doi.org/10.21303/2461-4262.2021.001775
Vascellari, M., Cau, G. (2012). Influence of turbulence–chemical interaction on CFD pulverized coal MILD combustion modeling. Fuel, 101, 90–101. doi: https://doi.org/10.1016/j.fuel.2011.07.042
Komissarov, K. B., Lutkov, S. A., Fil, A. V. (2007). Complex purification of flue gases of heat-generating plants. Rostov-on-Don: Branch of FSEIHPE, 134.
Ongar, B. (2018). The numerical research of the laws of the formation of nitrogen oxides during combustion of partially gasified coal. 6D071700 - Heat power engineering. Almaty: AUPET, 112.
Titov, S. P., Babiy, V. I., Barbarash, V. M. (1980). Study of NOx formation during combustion of coal dust. Heat power engineering, 3, 64–67.
Temirbaev, D. Zh. et. al. (2015). Pat. No. 90006 RK. Vortex pulverized coal burner. No. 30470/F23D1/02; published: 15.10.2015, Bul. No. 10.
Reid, D., Cabe, J. E., Bearden, M. D. (2010). PNNL Coal Gasification Research. Pacific Northwest National Laboratory Richland. Washington. doi: https://doi.org/10.2172/985585
👁 207 ⬇ 183
Copyright (c) 2022 Bulbul Ongar, Hristo Beloev, Iliya Iliev, Assem Ibrasheva, Anara Yegzekova
This work is licensed under a Creative Commons Attribution 4.0 International License.
Our journal abides by the Creative Commons CC BY copyright rights and permissions for open access journals.
Authors, who are published in this journal, agree to the following conditions:
1. The authors reserve the right to authorship of the work and pass the first publication right of this work to the journal under the terms of a Creative Commons CC BY, which allows others to freely distribute the published research with the obligatory reference to the authors of the original work and the first publication of the work in this journal.
2. The authors have the right to conclude separate supplement agreements that relate to non-exclusive work distribution in the form in which it has been published by the journal (for example, to upload the work to the online storage of the journal or publish it as part of a monograph), provided that the reference to the first publication of the work in this journal is included.