DEVELOPMENT OF THERMAL JET TOOL FOR PREPARATION AND COMBUSTION OF PULVERIZED COAL FUEL
Bukayeva A.Z. Povetkin V.V.
2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025Issue 459 - 73 pp.
The article discusses key aspects of preparing fuel components for efficient combustion in boiler units. The main challenge lies in ensuring complete and stable combustion of pulverized fuels while minimizing ignition energy costs and reducing risks of incomplete combustion, which can cause tube slagging and lower overall efficiency. The topic is highly relevant due to the need to improve the performance of thermal power plants and adapt to fuels with varying characteristics. The study analyzes coal dust mixture preparation, focusing on mixing processes, dispersion, and the influence of aerosol concentration and primary air temperature on fuel burnout rates. Theoretical methods were employed to evaluate combustion dynamics, including particle burnout time estimated with Nusselt and Blinov formulas, which incorporate diffusion effects, flame aerodynamics, and reaction kinetics. Key factors such as grinding fineness, excess air ratio, and furnace temperature were investigated. A core hypothesis is that a compact rocket burner generating a supersonic, high-temperature flame significantly improves ignition stability and combustion efficiency of pulverized coal. Results indicate that optimal conditions are achieved at an excess air ratio of α = 1.2-1.25 and with a properly dispersed mixture. The developed thermal tool ensures reliable ignition with minimal specific energy consumption, enhances combustion stability, and increases the efficiency of boiler units. The results obtained can be used in practice to modernize pulverized coal combustion systems at thermal power plants, as well as in the design of new boiler plants that require stable and economical fuel combustion.
boiler unit , combustion , fuel components , shock waves , thermal tool
Text of the article Перейти на текст статьи
Caspian University of Technology and Engineering named after Sh. Yessenov, Aktau, Kazakhstan
Kazakh National Technical University named after K.I. Satpayev, Almaty, Kazakhstan
Caspian University of Technology and Engineering named after Sh. Yessenov
Kazakh National Technical University named after K.I. Satpayev
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026