Науковий вісник НГУ

Scientific bases and peculiarities of conversion of CHPP anthracite boilers to sub-bituminous coal combustion

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Content №1 2024

Last Updated on 29 February 2024

Published on 30 November -0001

Hits: 1979

Authors:

M.V.Chernyavskyy*, orcid.org/0000-0003-4225-4984, Thermal Energy Technology Institute of 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.Yu.Provalov, orcid.org/0000-0002-5191-2259, Thermal Energy Technology Institute of 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.

Ye.S.Miroshnychenko, orcid.org/0000-0003-2487-6886, Thermal Energy Technology Institute of 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 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, (1): 041 - 049

https://doi.org/10.33271/nvngu/2024-1/041

Abstract:

Purpose. Development of scientific foundations and generalization of experience in development and implementation of technical solutions for conversion of CHPP anthracite boilers with steam productivity up to 250 t/h for combusting sub-bituminous coal with maximum use of existing equipment.

Methodology. Consumption and heat calculations of pulverizing systems, aerodynamic calculations of pulverized coal pipes and burners, thermal calculations of boilers and combustion chambers. Calculation justification of technical solutions to eliminate the risk of coal ignition in pulverizing systems and in the burners. Industrial tests on CHPP boiler units.

Findings. Different types of pulverizing systems of anthracite CHPP boilers with ball-drum mills, an intermediate pulverized coal hopper and with hot air as a drying agent were considered, and a classification of pulverizing systems by the method of pulverized coal transport to the burners (with drying agent or hot air), and boilers – by the type and location of the burners and the geometry of the furnace, was performed. The problems were analyzed, the calculations of pulverizing systems, pipes, burners, and boilers were performed according to the applied technical solutions, and the experience was summarized of conversion from anthracite to sub-bituminous coal in the boilers of Myronivska, Darnytska CHPP and of the first line of Slovianska TPP. Recommendations are given on methods of conversion of anthracite boilers with a steam capacity of up to 250 t/h with different types of pulverizing systems for burning sub-bituminous coal with maximum use of existing equipment.

Originality. For pulverizing systems with ball-drum mills and an intermediate hopper for pulverized coal with hot air as a drying agent classification was made for the first time by the type of transporting agent, and it was shown that when converting from anthracite to sub-bituminous coal with the air transport of pulverized coal to the burners, it is necessary to use the selection of slightly heated air from the first stage of the air heater. It is substantiated that maintaining the temperature conditions of molten slag removal while reducing the share of hot air consumption to the furnace requires the preferential operation of pulverizing systems in a single-mill mode, which is possible due to the greater grindability of sub-bituminous coal.

Practical value. Based on the experience of approving technical solutions at Myronivska, Darnytska CHPPs, and at the first line of Slovianska TPP, recommendations are given on how to transfer anthracite boilers with a steam capacity of up to 250 t/h with different types of pulverizing systems for burning sub-bituminous coal with maximum use of existing equipment.

Keywords: anthracite, sub-bituminous coal, pulverized coal boiler, pulverizing system, pulverized coal transportation, burner

References.

1. Kapustyanskyi, A. O., & Varlamov, G. B. (2016). Analysis of the fuel and energy complex of Ukraine. Scientific Bulletin of the Ternopil National Technical University, 3(83), 144-153.

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

3. Chernyavsky, N. V., Kosyachkov, A. V., & Roskolupa, A. I. (2017). Development of low-cost technical solutions for conversion of anthracite boilers of TPPs and CHPPs with steam capacity of 220–250 t/h to gas coal combustion. In 13 ^th International scientific-practical conference “Coal thermal energy: ways of reconstruction and development”: Collection of Science works, (pp. 48-50). Kyiv: Coal Energy Technology Institute of NAS of Ukraine. Retrieved from http://www.ceti-nasu.org.ua/upload/iblock/8a2/8a29ea5c807579c50f0b4755740a37cf.pdf.

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

5. Hanatani, A., & Ozawa, M. (2021). General planning of thermal power plant. In: JSME Series in Thermal and Nuclear Power Generation: Advances in Power Boilers. Elsevier, 107-118. https://doi.org/10.1016/B978-0-12-820360-6.00003-5.

6. James Hart, J., Bhuiyan, A. A., & Naser, J. (2018). Aerodynamics 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.

7. Chernyavsky, N., Provalov, O., Kosyachkov, O., & Bestsennyy, I. (2021). Scientific bases, experience of production and combustion of coal mixtures at thermal power plants of Ukraine. Procedia Environmental Science, Engineering and Management, 8(1), 23-31.

8. 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.

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

10. Makarov, V., Kaplin, M., Bilan, T., & Perov, M. (2023). Volumes forecasting of coal production in Ukraine. System studies in energy, 1(72), 35-45. https://doi.org/10.15407/srenergy2023.01.035 .

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

12. Yongjia, W., Ying, C., & Kai, W. (2019). Analysis and Research of Explosive Coal Explosivity in Coal-fired Power Plants. IOP Conference Series: Earth and Environmental Science, 237, 062006. https://doi.org/10.1088/1755-1315/237/6/062006.

13. Mohanty, M. K., Akbari, H., & Luttrell, G. H. (2012). Fine Coal Drying and Plant Profitability. In: Challenges in Fine Coal Processing, Dewatering, and Disposal, Society of Mining, Metallurgy, and Explorating, 329-344. Retrieved from https://www.researchgate.net/publication/272509412_FINE_COAL_DRYING_AND_PLANT_PROFITABILITY.

14. Kravets, T. Y., & Mysak, S. Y. (2014). Research and optimization of the KBM pulverized coal boilers’ operation. Power generation and electrification, 2, 19-20.

15. Mysak, S. Y. (2014). Development and implementation of new methods for determining the performance of mills of in pulverized coal boiler systems. Technology audit and production reserves, 3/4(17), 8-11.

16. Kravets, T., Semerak, M., Galyanchuk, I., & Yurasova, O. (2022). Efficiency of preparation for solid fuel burning. Mining Science, 29, 205-220. https://doi.org/10.37190/msc222912.

17. Naveh, R., Tripathi, N. M., & dHaim Kalman (2017). Experimental pressure drop analysis for horizontal dilute phase particle-fluid flows. Powder Technology, 321, 355-368. https://doi.org/10.1016/j.powtec.2017.08.029.

18. Mysak, S. Y., Galyanchuk, I. R., & Dubova, M. A. (2020). Investigation of the operation of boilers BKZ-210-140 and TGM-84b to improve the combustion process. Abstracts of VIII International Scientific and Practical Conference. Prague, Czech Republic, 668-671. https://doi.org/10.46299/ISG.2020.II.VIII.

19. Ivanovic, V. B., Zivanovich, T. V., Tucakovich, D. R., & Stupar, G. M. (2011). Reconstruction of the aero-mixture channels of the pulverized coal plant of the 100MW power plant unit. Thermal Science, 3(15), 663-676. https://doi.org/10.2298/TSCI100412013I.

20. Varlamov, G. B., & Kapustyanskyi, A. O. (2018). Method of bur­ning coal of grade G (UA. Patent No. 122658, F23K 1/00). Bulletin No. 2. Ukraine.

• < Prev
• Next >