Simulation and experiment of plasma ignition of low-grade coal
DOI:
https://doi.org/10.18321/cpc22(1)27-36Keywords:
coal, plasma ignition, plasma-coal burner, highly reactive two-component fuel, modeling.Abstract
A plasma-coal burner is studied utilizing a model of plasma thermochemical preparation of coal for combustion, implemented in the PlasmaKinTherm program. For boiler start-up and coal combustion stabilization, plasma-coal burners do not require fuel oil or gas. The PlasmaKinTherm program combines thermodynamics and kinetics to describe the thermochemical preparation of fuel in the plasma-coal burner volume. The purpose of the simulation was to determine the conditions for plasma ignition of low-grade coal. A numerical study was carried out of the influence of the plasmatron power on the ignition of the air mixture (coal + air). High-ash Ekibastuz coal was used in the calculations. The distributions of temperature and velocity of gas and coal particles and concentrations of products of plasma thermochemical preparation of coal for combustion along the length of the burner were calculated. As a result of the analysis of the processes of plasma ignition of coal, their main patterns were revealed, including the shift of the maximum temperatures and velocities of the products of thermochemical preparation of coal for combustion upstream (towards the plasma torch), as well as the fact that the maximum values of temperatures and velocities of the products do not depend on power plasmatron. At the plasmatron power determined by kinetic modeling, experiments were conducted to test and validate the ignition and combustion conditions for a highly reactive two-component fuel torch. The assumptions made during the development of the mathematical model were confirmed by comparing the calculations with experimental data.
References
(1). «MirTesen» Media platform. 11 Feb. (2024) https://topcor.mirtesen.ru/blog/43107190163/Trillion-evro-na-veter-lider-klimaticheskogo-dvizheniya-ES-vernu?utm_referrer=mirtesen.ru (in Russian)
(2). «Energy Agency». Paris. (2023) IEA Coal 2023: Analysis and forecast to 2026. https://www.iea.org/reports/coal-2023
(3). Fu C (2015) Energy Conversion and Management 105:530-544. https://doi.org/10.1016/j.enconman.2015.08.019
(4). The Next Generation and Future of GE. (2018)High-efficiency, low-emissions coal plants: Come hele or high water. https://www.ge.com/power/transform/article.transform.articles.2018.mar.come-hele-or-high-water.
(5). Yazicioğlu Ö. and Кatircioğlu T.yaşar (2017) Kırklareli Üniversitesi Mühendislik ve Fen Bilimleri Dergisi 3(1):P.18-44. https://dergipark.org.tr/en/pub/klujes/issue/30132/311323.
(6).Song F (2021) Global Energy Interconnection 4(4): 354-370. https://doi.org/10.1016/j.gloei.2021.09.007.
(7).Messerle VE, Lavrichshev OA, Ustimenko AB, Orynbasar MN (2023) Thermophys. Aeromech 30: 595-599. https://doi.org/10.1134/S0869864323030186
(8). «Fari Plasma» Internet platform. (2023) Why plasma technology is the future of Renewable Energy. https://www.fariplasma.com/plasma-technology-of-renewable-energy/
(9). Pawlak-Kruczek H (2023) Energy 279:128115. https://doi.org/10.1016/j.energy.2023.128115
(10). Messerle VE and Ustimenko AB (2024) Applications in Energy and Combustion Science 17: 100248.https://doi.org/10.1016/j.jaecs.2024.100248.
(11). «Kommersant» Internet platform. (2024) Oil-free technologies at thermal power plants save billions. https://www.kommersant.ru/doc/6559928. (in Russian)
(12). Lubsanovich Buyantuev S (2017) Oriental Journal of Chemistry 33(04): 1774-1780. https://doi.org/10.13005/ojc/330422
(13). Messerle VE, Mossé AL, Orynbasar MN (2024) J Eng Phys Thermophy 97: 116–125. https://doi.org/10.1007/s10891-024-02874-6
