References

energy

Энергетика. Известия высших учебных заведений и энергетических объединений СНГ

ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations

1029-74482414-0341

BNTU

10.21122/1029-7448-2024-67-4-332-344

energy-2390

Research Article

ТЕПЛОЭНЕРГЕТИКА

НEAT POWER ENGINEERING

Расчетно-экспериментальное исследование закономерностей формирования кипящего слоя инертного керамзитового материала

Computational and Experimental Study of the Patterns of Formation of a Fluidized Bed of Inert Haydite Particles Material

Митрофанов

А. В.

Mitrofanov

A. V.

Павлодар

Pavlodar

Василевич

С. В.

Vasilevich

S. V.

Адрес для переписки:Василевич Сергей Владимирович -Белорусская государственная академия авиации,ул. Уборевича, 77,220096, г. Минск, Республика Беларусь/Тел.: +375 17 249-97-65svasilevich@yandex.ru

Address for correspondence:Vasilevich Siarhei V. - Belarusian State Academy of Aviation,77, Uborevich str.,220096, Minsk, Republic of Belarus.Tel.: +375 17 249-97-65svasilevich@yandex.ru

svasilevich@yandex.ru

Стойко

С. О.

Stojko

S. O.

г. Минск

Minsk

Торайгыров университетКазахстанToraighyrov UniversityKazakhstan

Белорусская государственная академия авиацииБеларусьBelarusian State Academy of AviationBelarus

2024

12082024

674332344

2024

Митрофанов А.В., Василевич С.В., Стойко С.О.

Mitrofanov A.V., Vasilevich S.V., Stojko S.O.

Данная работа распространяется под лицензией Creative Commons Attribution 4.0.

This work is licensed under a Creative Commons Attribution 4.0 License.

https://energy.bntu.by/jour/article/view/2390

В настоящее время актуальной тенденцией развития топливно-энергетических комплексов ряда стран является диверсификация генерации за счет вовлечения местных видов твердого топлива. При этом термохимическая переработка топлива часто реализуется в псевдоожиженном состоянии. Существенная доля дисперсных видов топлива не может быть переведена в состояние стабильного псевдоожижения. Выходом в таких случаях является создание псевдоожиженного слоя инертного носителя, в который затем вводят частицы целевого топливного компонента. В настоящей работе предпринято расчетно-экспериментальное исследование псевдоожижения инертного сыпучего материала (гранул керамзита). Целью настоящей работы является разработка математической модели формирования псевдоожиженного слоя, позволяющей вести расчет процесса по его локальным характеристикам, а также идентификация параметров модели и ее проверка по данным натурного эксперимента. В ходе исследования решены задачи разработки численного метода расчета распределения скоростей и концентраций по высоте аппарата, выполнена параметрическая идентификация предложенной математической модели, эмпирическая проверка результатов моделирования. В качестве математической основы построения модели использован математический аппарат теории цепей Маркова. Для идентификации параметров модели и ее верификации использованы данные собственного натурного эксперимента. Сравнение расчетных и экспериментальных данных показало высокую прогностическую эффективность модели для известного гранулометрического состава ожижаемого продукта. Результаты натурных экспериментов показали также значительную эволюцию гранулометрического состава частиц керамзита при их длительном пребывании в псевдоожиженном слое, что требует отдельного исследования, а также введения соответствующих поправок в математическую модель для ее дальнейшего совершенствования.

At present, an actual trend in the development of fuel and energy complexes in a number of countries is the diversification of generation via the involvement of local types of solid fuel. In this case, thermochemical processing of fuel is often carried out in a fluidized state. A significant proportion of dispersed fuels cannot be transferred to a state of stable fluidization. The solution in such cases is to create a fluidized bed of inert carrier, into which particles of the target fuel component are then introduced. In this work, a computational and experimental study of the fluidization of inert bulk material (haydite granules) was carried out. The key purpose of the work was to develop a mathematical model for the formation of a fluidized bed, which makes it possible to calculate the process based on its local characteristics, as well as to identify the model parameters and test it using experiment data. During the study the problems of developing a numerical method for calculating the distribution of velocities and concentrations along the height of the apparatus were solved, parametric identification of the proposed mathematical model was carried out, and empirical verification of the modeling results was carried out. The mathematical apparatus of the theory of Markov chains was used as the mathematical basis for constructing the model. The data from our own laboratory full-scale experiment were used to identify the parameters of the model and verify it. A comparison of calculated and experimental data showed the high predictive efficiency of the model for the given granulometric composition of the fluidizing product. The results of the laboratory full-scale experiments also showed a significant evolution of the granulometric composition of haydite granules during their long-term stay in a fluidized bed, which requires a separate study, as well as the introduction of appropriate amendments to the mathematical model for its further improvement.

: псевдоожиженный слойчисленное моделированиецепи Марковапрофиль скорости газачастицы керамзита

fluidized bednumerical simulationMarkov chainsgas velocity profilehaydite particles

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The authors declare that there are no conflicts of interest present.