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Efficiency of underground gas generator in consideration of the reverse mode

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Category: Contens №4 2020

Last Updated on 05 September 2020

Published on 30 August 2020

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Authors:

P. B. Saik, orcid.org/0000-0001-7758-1083, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. S. Falshtynskyi, orcid.org/0000-0002-3104-1089, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. H. Lozynskyi, orcid.org/0000-0002-9657-0635, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

E. C. Cabana, orcid.org/0000-0002-0066-1349, National University of Saint Augustine, Arequipa, Peru, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M. S. Demydov, orcid.org/0000-0002-8000-4639, Geological Concern “Geobit”, Chrzanów, Poland, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

R. O. Dychkovskyi, orcid.org/0000-0002-3143-8940, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (4): 039-046

https://doi.org/10.33271/nvngu/2020-4/039

повний текст / full article

Abstract:

Purpose. Activation of the processes of well underground coal gasification with the consideration of the reverse mode of the underground gas generator based on the balanced state between the oxidizing and reducing zones of the fire face.

Methodology. The underground gas generator efficiency was evaluated based on the analytical and laboratory studies. Analytical substantiation of the implementation of reverse operations in terms of the underground gas generator is based on the quantitative parameters of coal gasification in the oxidizing and reducing zones of the underground gas generator and their advance rates. Laboratory studies were carried out on a stand unit with the modeling of the coal gasification processes.

Findings. Efficiency of the underground gas generator operation by reversing with blowing mixtures has been substantiated, which helps to maintain the balance between its oxidizing and reducing zones. Time periods for the reverse operations have been identified on the basis of the averaged value of concentrations of the combustible generator gases on the outlet from the modeled underground gas generator.

Originality. Dependences of the changes in displacements of the active underground gas generator zones in terms of the implemented reverse of blowing mixture supply have been obtained with the consideration of mining and geological conditions of the occurrence of coal seam c₆ of Solenivska site of Donets coalfield. Parameters of the temperature field distribution around the fire face of the underground gas generator have been identified. Correction coefficient (k_v) has been determined, which helps to obtain the data on the advance rate of the oxidizing zone of the underground gas generator with the use of “MTB WUCG” software.

Practical value. A design of the laboratory stand unit for coal gasification has been improved, which simplifies the control of technological processes while studying gasification modes. Operating efficiency of the underground gas generator with the transition to the reverse mode has been substantiated on the basis of energy balance of the active zones of the reaction channel and composition of the generator gas.

References.

1. Sribna, Y., Trokhymets, O., Nosatov, I., & Kriukova, I. (2019). The globalization of the world coal market – contradictions and trends. E3S Web of Conferences, (123), 01044. https://doi.org/10.1051/e3sconf/201912301044.

2. Sekerin, V., Dudin, M., Gorokhova, A., Bank, S., & Bank, O. (2019). Mineral resources and national economic security: current features. Mining of Mineral Deposits, 13(1), 72-79. https://doi.org/10.33271/mining13.01.072.

3. Pivnyak, G. G., & Shashenko, O. M. (2015). Innovations and safety for coal mines in Ukraine. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (6), 118-121.

4. Piwniak, G. G. (2017). Limits to economic viability of extraction of thin coal seams in Ukraine. Technical, Technological and Economic Aspects of Thin-Seams Coal Mining, 129-132. https://doi.org/10.1201/noe0415436700.ch16.

5. Khomenko, O., Tsendjav, L., Kononenko, M., & Janchiv, B. (2017). Nuclear-and-fuel power industry of Ukraine: production, science, education. Mining of Mineral Deposits, 11(4), 86-95. https://doi.org/10.15407/mining11.04.086.

6. Basu, R. (2017). Evaluation of some renewable energy technologies. Mining of Mineral Deposits, 11(4), 29-37. https://doi.org/10.15407/mining11.04.029.

7. Medianyk, V. (2020). Solutions multivariance about designing new levels of coal mines. Rudarsko Geolosko Naftni Zbornik, 35(2). Accepted paper. https://doi.org/10.17794/rgn.2020.2.3.

8. Kalybekov, T., Rysbekov, K. B., Toktarov, A. A., & Otarbaev, O. M. (2019). Underground mine planning with regard to preparedness of mineral reserves. Mining Informational and Analytical Bulletin, (5), 34-43.

9. Bondarenko, V., Tabachenko, M., & Wachowicz, J. (2015). Possibility of production complex of sufficient gasses in Ukraine. New Techniques and Technologies in Mining, 113-119. https://doi.org/10.1201/b11329-19.

10. Adjiski, V., Despodov, Z., Mirakovski, D., & Serafimovski, D. (2019). System architecture to bring smart personal protective equipment wearables and sensors to transform safety at work in the underground mining industry. Rudarsko Geolosko Naftni Zbornik, 34(1), 37-44. https://doi.org/10.17794/rgn.2019.1.4.

11. Smoliński, A. (2018). Mathematical and Geomechanical Model in Physical and Chemical Processes of Underground Coal Gasification. Solid State Phenomena, (277), 1-16. https://doi.org/10.4028/www.scientific.net/ssp.277.1.

12. Smoliński, A. (2019). Characteristic of Possible Obtained Products during the well Underground Coal Gasification. Solid State Phenomena, (291), 52-62. https://doi.org/10.4028/www.scientific.net/ssp.291.52.

13. Hwang, S. C., Kim, S. K., Park, J. Y., Lee, D. K., Lee, S. H., & Rhee, Y. W. (2014). Kinetic study on Low-rank Coal Including K₂CO₃, Na₂CO₃, CaCO₃ and Dolomite Gasification under CO₂ Atmosphere. Clean Technology, 20(1), 64-71. https://doi.org/10.7464/ksct.2014.20.1.064.

14. Subbotin, A. N., Tarazanov, A. S., & Orlova, K. Y. (2016). Numerical analysis of the underground coal ga­sification syngas composition in dependence to supplied ­oxidizer properties. International Forum on Strategic ­Tech­nology (IFOST), 303-307. https://doi.org/10.1109/ifost.2016.7884253.

15. Falshtynskyi, V., Saik, P., Lozynskyi, V., Dychkovskyi, R., & Petlovanyi, M. (2018). Innovative aspects of underground coal gasification technology in mine conditions. Mining of Mineral Deposits, 12(2), 68-75. https://doi.org/10.15407/mining12.02.068.

16. Falshtynskyi, V. S., Dychkovskyi, R. O., Saik, P. B., Lozynskyi, V. H., & Cabana, E. C. (2017). Formation of thermal fields by the energy-chemical complex of coal gasification. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 36-42.

17. Golovchenko, A. (2020). Some aspects of the control for the radial distribution of burden material and gas flow in the blast furnace. Energies, 13(4), 923-926. https://doi.org/10.3390/en13040923.

18. Dychkovskyi, R. O. (2015). Forming the bilayer artificially shell of georeactor in underground coal gasification. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 37-42.

19. Tabachenko, M. (2016). Substantiating parameters of stratification cavities formation in the roof rocks during underground coal gasification. Mining of Mineral Deposits, 10(1), 16-24. http://dx.doi.org/10.15407/mining10.01.016.

20. Prusek, S., Lubosik, Z., Rajwa, S., Walentek, A., & Wrana, A. (2017). Geotechnical monitoring of rock mass and support behaviour around the UCG georeactor: Two case studies in Polish coal mining industry. International Conference on Ground Control in Mining, 321-328.

21. Sadovenko, I., Zagrytsenko, A., Podvigina, O., & Derevia­gina, N. (2016). Assessment of environmental and technical risks in the process of mining on the basis of numerical simulation of geofiltration. Mining of Mineral Deposits, 10(1), 37-43. http://dx.doi.org/10.15407/mining10.01.037.

22. Yun, Z., Jianfang, S., & Zhongchun, L. (2019). Study of numerical simulation method modelling gas injection into fractured reservoirs. Mining of Mineral Deposits, 13(2), 41-45. https://doi.org/10.33271/mining13.02.041.

23. Lozynskyi, V., Saik, P., Petlovanyi, M., Sai, K., Malanchuk, Z., & Malanchyk, Ye. (2018). Substantiation into mass and heat balance for underground coal gasification in faulting zones. Inzynieria Mineralna, 19(2), 289-300. http://doi.org/10.29227/IM-2018-02-36.

24. Wang, J., Wang, Z., Xin, L., Xu, Z., Gui, J., & Lu, X. (2017). Temperature field distribution and parametric study in underground coal gasification stope. International Journal of Thermal Sciences, (111), 66-77. https://doi.org/10.1016/j.ijthermalsci.2016.08.012.

25. Mallett, C., & Zhang, J. (2017). Gasifier face advance in underground coal gasification. Coal-Energy, Environment and Sustainable Development, PCC.

26. Lozynskyi, V., Dychkovskyi, R., Saik, P., & Falshtynskyi, V. (2018). Coal Seam Gasification in Faulting Zones (Heat and Mass Balance Study). Solid State Phenomena, (277), 66-79. https://doi.org/10.4028/www.scientific.net/SSP.277.66.

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