Technologies of oil-free boilers start-up and stabilization of the ignition of pulverized coal flame at thermal power plants
DOI:
https://doi.org/10.18321/cpc330Keywords:
сoal, combustion, ignition, oil-free kindling, stabilization of the flame, thermal power plants.Abstract
This paper presents the results of studies of the replacement of heating oil with gaseous fuel. Three ways of its replacement are considered: compressed, liquefied natural gas and combustible gas obtained from coal during its heat treatment, including plasma. The oil-free plasma ignition of solid fuels is based on their thermochemical preparation for combustion, as a result of which, from low-grade energy coals, a highly reactive, two-component fuel, consisting of combustible gas and activated coke residue, is heated to a high temperature. The prospects of using plasmatrons, compressed natural gas and gaseous combustible substances of coal for the oil-free kindling of boilers and stabilization of ignition of a coal-dust plume at a thermal power plant is shown. The oilfree start-up of boiler units with combustible volatile substances obtained from coal eliminates the use of fuel oil or natural gas to start-up the boiler and stabilizes ignition of the pulverized coal flame when the boiler is operating at reduced loads, as well as reduces the financial costs associated with the high cost of fuel oil and energy costs of TPP own needs related to multi-stage preparation of fuel oil for burning. This increases the environmental and economic efficiency of pulverized coal power plants.
References
(1). B. Aliyarov, A. Mergalimova, U. Zhalmagambetova. Application of coal thermal treatment technology for oil-free firing of boilers / Latvian journal of physics and technical sciences. – 2018, N 2. – P.45-55. https://doi.org/10.2478/lpts-2018-0012
(2). Алияров Б.К., Алиярова М.Б. Сжигание Казахстанских углей на ТЭС и на крупных котельных, Алматы 2012. Гылым. – 304 с.
(3). Blackburn P.R. Ignition of рulverized coal with Arc Heated Air// Energy, 1980. Vоl.4, № 3. P. 98-99. https://doi.org/10.2514/3.62464
(4). Мессерле В.Е., Устименко А.Б. Плазменное воспламенение и горение твердого топлива. (Научно-технические основы). // Saarbrucken, Germany: Palmarium Academic Publishing (ISBN: 978-3-8473-9845-5). – 2012. – 404 с. (http:// ljubljuknigi.ru/)
(5). Messerle V.E., Karpenko E.I., Ustimenko A.B. Plasma Assisted Power Coal Combustion in the Furnace of Utility Boiler: Numerical Modelling and Full-Scale Test // Fuel, 15 June 2014. – Vol. 126. – P.294-300. https://doi.org/10.1016/j.fuel.2014.02.047
(6). Карпенко Е.И., Карпенко Ю.Е., Мессерле В.Е., Устименко А.Б. Использование плазменно- топливных систем на пылеугольных ТЭС Евразии // Теплоэнергетика. – 2009. – N 6. – С. 10-14.
(7). Yantai Longyuan Power Technology Co., Ltd. Main Products: Plasma Ignition & CombustionSystem on Pulverized-Coal Fired Plants. http://www. cccme.org.cn/shop/cn1223328501/introduction. aspx
(8). Мессерле В.Е., Устименко А.Б., Умбеткалиев К.А. Плазмохимия и процессы горения // Горение и плазмохимия. – 2017. – Т.15, №2. – С.113–122.
(9). Алияров Б.К., Мергалимова А.К. Способ безмазутной растопки котлоагрегатов. Патент на полезную модель №2450, гос. реестр полезных моделей РК, 2017.
