Articles

CFD-modeling of critical deviations of combustion processes in pulverized coal boilers. Part 1. Construction of the TPP-210A boiler calculation model

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Content №2 2024

Last Updated on 01 May 2024

Published on 30 November -0001

Hits: 2412

Authors:

D.L.Bondzyk, orcid.org/0000-0003-3123-1971, Thermal Energy Technology Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.V.Baranyuk, orcid.org/0000-0001-6008-6465, Thermal Energy Technology Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine; National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.V.Vorobyov*, orcid.org/0000-0001-9621-7658, Thermal Energy Technology Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine; National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.V.Chernyavskyy, orcid.org/0000-0003-4225-4984, Thermal Energy Technology Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.V.Kosyachkov, orcid.org/0000-0002-9445-8738, Thermal Energy Technology Institute of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (2): 052 - 059

https://doi.org/10.33271/nvngu/2024-2/052

Abstract:

Purpose. Development of a mathematical model for predicting critical deviations of furnace processes during the operation of anthracite boilers converted to burning sub-bituminous coal, including in non-design modes of operation. Verification of the calculation model of the TPP-210A boiler of the 300 MW power unit on the design fuel – anthracite for further analysis of its operation on sub-bituminous coal.

Methodology. Modelling of solid fuel combustion was performed with the help of finite-element CFD models of the boiler unit in the ANSYS-Fluent software complex with the determination of the relevant characteristics of the boiler.

Findings. Finite-element CFD models were developed according to the working drawings of the TPP-210A boiler and its burner device, reconstructed for burning sub-bituminous coal. Verification of the results of CFD modeling was carried out for the case of burning the design fuel – anthracite in the design operating modes. It is shown that the discrepancy between the results and the experiment does not exceed 6.5 %, which allows the use of the developed computer model for simulating the burning of sub-bituminous coal, including in non-design operating modes. The obtained results are the basis for further calculations of the operation of the TPP-210A boiler of the 300 MW power unit on sub-bituminous coal with the determination and minimization of the factors of critical deviations of furnace processes that lead to thermal damage of wall screens.

Originality. For the first time, CFD modelling has taken into account all the design features of the burner devices of the TPP-210A boiler, reconstructed for burning sub-bituminous coal with the introduction of a steam ejector of a high-concentration dust pipe under rarefaction to the central air channel. For the first time, the distribution of thermal resistances has been applied as boundary conditions on the walls of the fuel tank for the case of burning sub-bituminous coal. The validity of these approaches was confirmed by the verification of the results.

Practical value. The verified computer model of the TPP-210A boiler of the 300 MW power unit converted to burning sub-bituminous coal will allow determining and minimizing the factors of critical deviations of furnace processes which lead to thermal damage of wall screens. This will contribute to increasing the reliability and improving the technical and economic indicators of the boilers of the Trypilska TPP, where 3 such boilers are operating, and other power plants (Zmiyivska, Kryvorizka, Prydniprovska), where similar anthracite boilers are planned to be converted to sub-bituminous coal.

Keywords: pulverized coal boiler, anthracite, sub-bituminous coal, CFD modelling, radiant and convective heat exchange

References.

1. Dunayevska, N. I. (2023). Problems and technologies of thermal processing of fuels in energy installations of thermal power plants. Visnyk of the National Academy of Sciences of Ukraine, (4), 72-84. https://doi.org/10.15407/visn2023.04.072.

2. World Energy Outlook (2023). Chapter 3: Pathways for the energy mix, (pp. 101-153). International Energy Agency. Retrieved from https://iea.blob.core.windows.net/assets/42b23c45-78bc-4482-b0f9-eb826ae2da3d/WorldEnergyOutlook2023.pdf.

3. Сhernyavskyy, M., Miroshnychenko, Y., Provalov, O., & Kosyachkov, O. (2023). Conversion of anthracite boiler units of chp plants for combustion of sub-bituminous coal in the war conditions. Energy Technologies & Resource Saving, 76(3), 3-20. https://doi.org/10.33070/etars.3.2023.01.

4. Makarov, V., Kaplin, M., Bilan, T., & Perov, M. (2023). Forecasting of coal production in Ukraine. System Research in Energy, 1(72), 35-45. https://doi.org/10.15407/srenergy2023.01.035.

5. Dipak, K. Sarkar (2015). Thermal power plant: Design and Operation. Elsevier Incorporated. https://doi.org/10.1016/B978-0-12-801575-9.00001-9.

6. Seheda, M. S., Beshta, O. S., Gogolyuk, P. F., Blyznak, Yu. V., Dychkovskyi, R. D., & Smoliński, A. (2024). Mathematical model for the management of the wave processes in three-winding transformers with consideration of the main magnetic flux in mining industry. Journal of Sustainable Mining, 23(1), 20-39. https://doi.org/10.46873/2300-3960.1402.

7. ANSYS FLUENT 14.5 Theory Guide (2012). ANSYS Inc. ANSYS Help. Retrieved from https://ansyshelp.ansys.com.

8. Hart, J., Bhuiyan, A. A., & Naser, J. (2018). Aerodynamics of burner jet in a tangentially-fired boiler: A CFD modelling and experiment. International Journal of Thermal Sciences, 129, 238-253. https://doi.org/10.1016/j.ijthermalsci.2018.02.030.

9. Liu, H., Guo, X., Chen, L., Zhang, X., & Qing Wang, Q. (2021). Numerical simulation of high-temperature corrosion and NOx generation characteristics of a boiler. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 1-22. https://doi.org/10.1080/15567036.2021.1931566.

10. Noor Akma Watie Mohd Noor, Hasril Hasini, Muhamad Shazarizul Haziq Mohd Samsuri & Meor Mohd Faisal Meor Zulkifli (2020). CFD Analysis on the Effects of Different Coal on Combustion Characteristics in Coal-fired Boiler. CFD Letters, 12(10), 128-138. https://doi.org/10.37934/cfdl.12.10.128138.

11. Liu, X., Zhang, J., Tan, H., Mo, Q., Wang, X., & Wan, Y. (2021). Numerical and experimental study on co-firing of low volatile coal in a 330 MW tangentially fired boiler. Journal of the Energy Institute, 96, 242-250. https://doi.org/10.1016/j.joei.2021.03.015.

12. Wei, D., An, D., Wang, T., Zhang, H., Guo, Yo., & Sun, B. (2023). Influence of fuel distribution on co-combustion of sludge and coal in a 660 MW tangentially fired boiler. Applied Thermal Engineering, 227. https://doi.org/10.1016/j.applthermaleng.2023.120344.

13. Madejski, P. (2018). Numerical study of a large-scale pulverized coal-fired boiler operation using CFD modeling based on the probability density function method. Applied Thermal Engineering, 145, 352-363. https://doi.org/10.1016/j.applthermaleng.2018.09.004.

14. Deng, L., Zhang, Y., Ma, S., Zhu, Z., Liu, H., & Belošević, S. (2021). Numerical study on combustion characteristics and heat flux distributions of 660-MW ultra-supercritical double-reheat tower-type boiler. Asia-Pacific Journal of Chemical Engineering, 16(3). https://doi.org/10.1002/apj.2631.

15. Askarova, A., Georgiev, A., Bolegenova, S., Beketayeva, M., Maximov, V., & Bolegenova, S. (2022). Computational modeling of pollutants in furnaces of pulverized coal boilers of the republic of Kazakhstan. Energy, 258(1), 124826. https://doi.org/10.1016/j.energy.2022.124826.

16. Laubscher, R., & Rousseau, P. (2020). Coupled simulation and validation of a utility-scale pulverized coal-fired boiler radiant final-stage superheater. Thermal Science and Engineering Progress, 18, 100512. https://doi.org/10.1016/j.tsep.2020.100512.

17. Norchak, V. (2022). Combustion of composite peat-coal mixtures in a vortex fire-place. Collected scientific works of Ukrainian State University of Railway Transport, 199, 23-31. https://doi.org/10.18664/1994-7852.199.2022.258647.

18. Vorobyov, N., Baranyuk, A., & Dunayevska, N. (2023). CFD Modeling of Water Heating Boiler Operation with Different Types of Fuel Pellets. International Journal of Energy for a Clean Environment, 24(1), 115-127. https://doi.org/10.1615/InterJEnerCleanEnv.2022043888.

19. Dunayevska, N. I., Zasyadko, Y. I., Zasyadko, P. Y., & Shchudlo, T. S. (2017). Mathematical model of the processes of co-combustion of biomass with coal in the boiler of a thermal power plant. Electronic Modeling, 39(3), 89-104.

20. Dunaevska, N. I., Bondzyk, D. L., Nehamin, M. M., Miroshni­chenko, Ye. S., Beztsenny, I. V., Yevtukhov, V. Ya., & Shudlo, T. S. (2020). Technology of Anthracite and Solid Biofuels Co-Firing in Pulverized Coal Boilers of TPP and CHP. Science and Innovation, 16(5), 86-96. https://doi.org/10.15407/scin16.05.086.

21. Nekhamin, M., Beztsennyi, I., Dunayevska, N., & Vyfatnuik, V. (2020). On using the ANSYS FLUENT software for calculating the process of burning a mixture of particles from different types of solid fuels. Eastern-European Journal of Enterprise Technologies, 4(8(106)), 48-53. https://doi.org/10.15587/1729-4061.2020.209762.

22. Nekhamin, M. (2020). Design by program ANSYS FLUENT processes in heating of caldron of tpp-210а. Energy Technologies & Resource Saving, (3), 35-40. https://doi.org/10.33070/etars.3.2020.03.

23. Chernyavskii, N. V., Miroshnichenko, E. S., & Provalov, A. Y. (2021). Experience in Converting TPP-210A Boilers with 300 MW Power Units to Burning Gas Coal at the Tripillya Thermal Power Plant. Power Technology and Engineering, 54(5), 699-706. https://doi.org/10.1007/s10749-020-01273-0.

24. Baraniuk, O. V., Vorobyov, M. V., & Rachynskyi, A. Y. (2023). CFD-modeling of heat transfer and hydrodynamics processes by means of a software package: monograph. Kyiv: Igor Sikorsky Kyiv Polytechnic Institute, Polytechnic Publishing House. ISBN 978-966-990-062-3.

• < Prev
• Next >