Spraying characteristics of coal-water slurries based on lignite and pyrogenetic liquid
Автор: Gvozdyakov D.V., Zenkov A.V.
Журнал: Вестник Южно-Уральского государственного университета. Серия: Энергетика @vestnik-susu-power
Рубрика: Теплотехника
Статья в выпуске: 3 т.25, 2025 года.
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The article presents the results of experimental studies of the spraying characteristics of coal-water slur-ries based on lignite and pyrogenetic liquid. The introduction of pyrogenetic liquid into the slurries was carried out by replacing it with a similar amount of coal and water by weight (from 10 to 20 %). The substitution of only water with pyrogenetic liquid leads to a significant increase in the viscosity of the slurry and turns it into a non-flowing substance. As the concentration of pyrogenetic liquid in the slurry increased, the value of kinematic viscosity changed by 51 and 45 %, respectively, in comparison with two-component coal-water slurry due to a decrease in the concentration of both water and coal. A slight effect (changes of no more than 3 %) of the pyrogenetic liquid on the density of slurries was found. The average size of slurry droplets in the study area on the 226–350 mm segment from the nozzle decreases by 8 % compared to the 0–100 mm segment. After replacing 10 % and 20 % of coal and water in the fuel with a similar amount of pyrogenetic liquid, the average droplet size of coal-water slurries decreased by 10 %. In general, droplets of the largest size are typical for the slurries with addition of 10 % by weight of pyrogenetic liquid. The jet spraying angle for the studied compositions varied slightly. Its average value was 19°. The substitution of coal and water in the compo-sition of lignite-based slurries with a similar amount of pyrogenetic liquid by weight allows spraying such coal-water slurries quite effectively.
Lignite, coal-water slurry, pyrogenetic liquid, kinematic viscosity, spraying, average droplet size
Короткий адрес: https://sciup.org/147252021
IDR: 147252021 | УДК: 662.62:662.75:662.94 | DOI: 10.14529/power250309