Criterion equation for the energy efficiency of coal dust precipitation

The urgency of the efficiency improvement in coal dust precipitation is determined by the development of industrial processes. To increase the efficiency of high-pressure dust precipitation the authors suggested a method and a criterion equation for the calculation of the energy efficiency of dust precipitation. The patented design of a hydrovortex nozzle, which enables the significant increase in the effectiveness of the liquid drops dispersion was suggested. The design was based on a mathematical model of interaction between a liquid droplet and a dust particle under the action of the attached vortex induced by rotating liquid droplets. Similarity criteria of dispersion in the spinning motion of liquid droplets were obtained using the theory of similarity and the dimensional analysis. The study shows that the principal criterion characterizing the quality index of a liquid droplet split performed by a hydrovortex nozzle is the Weber number. Furthermore, it specifies the cost efficiency in water and energy for hydrovortex dust suppression. Simulation data test proved the sufficient convergence of the dependence of efficiency enhancement to hydrovortex dust suppression on the angular velocity of drops rotation. It is shown that hydrovortex dust suppression allows to increase the efficiency of dedusting up to 99% by means of the quality of splitting and the increase in the dispersion of liquid droplets. The calculations and experimental studies enabled to increase the efficiency of dispersion by 15%, reducing the average diameter of liquid droplets 2.5 times, thus, abating its consumption by 10%.

Keywords: high-pressure hydrovortex dust suppression, hydrovortex nozzle, circular motion, Weber numbers, Laplas numbers, attached vortex, diffusion, energy efficiency.
For citation:

Makarov V. N., Ugolnikov A. V., Makarov N. V., Churakov E. O. Criterion equation for the energy efficiency of coal dust precipitation. MIAB. Mining Inf. Anal. Bull. 2022;(112):126-136. [In Russ]. DOI: 10.25018/0236_1493_2022_112_0_126.

Acknowledgements:
Issue number: 11
Year: 2022
Page number: 126-136
ISBN: 0236-1493
UDK: 622.23.05:622.807
DOI: 10.25018/0236_1493_2022_112_0_126
Article receipt date: 16.06.2022
Date of review receipt: 01.10.2022
Date of the editorial board′s decision on the article′s publishing: 10.10.2022
About authors:

V.N. Makarov1, Dr. Sci. (Eng.), Professor, e-mail: uk.intelnedra@gmail.com, ORCID ID: 0000-0002-3785-5569,
A.V. Ugolnikov1, Cand. Sci. (Eng.), Assistant Professor, Head of Chair, e-mail: ugolnikov@yandex.ru, ORCID ID: 0000-0002-8442-4841,
N.V. Makarov1, Cand. Sci. (Eng.), Assistant Professor, Head of Chair, e-mail: mnikolay84@mail.ru, ORCID ID: 0000-0001-7039-6272,
E.O. Churakov1, Graduate Student, e-mail: gmf.gm@m.ursmu.ru.
1 Ural State Mining University, 620144, Ekaterinburg, Russia.

 

For contacts:

A.V. Ugolnikov, e-mail: ugolnikov@yandex.ru.

Bibliography:

1. Evtushenko A. I., Evtushenko I. I., Nor-Arevyan S. L., Bel'skaya Ya. B. On the question of research ways to improve the effectiveness of dust control irrigation. Engineering journal of Don. 2016, vol. 42, no. 3(42), pp. 46—55. [In Russ].

2. Valiev N. G., Stradanchenko S. G., Maslennikov S. A., Golodov M. A., Armeiskov V. N. Environmental protection of a coal-mining region. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2021, no. 7, pp. 80—91. [In Russ].

3. Alimenko N. I., Kamenskikh A. A., Nikolaev A. V., Petrov A. I. Numerical modeling of heat and mass transfer during hot end cool air mixing in a supplyshaft in underground mine. Eurasian Mining. 2016, no. 2, pp. 45—47.

4. Ivanov A. V., Strizhenok A. V. Evaluation of the effectiveness of dust screens and the possibilities of taking into account their influence in software models. Journal of Physics: Conference Series. 2021, vol. 1728, no. 1, article 012008. DOI: 10.1088/1742-6596/1728/1/012008.

5. Nikolaev A. V., Lyalkinaa G. B., Kychkin A. V., Vöth S. Season-oriented mine ventilation modes analysis. Eurasian Mining. 2021, no. 2, pp. 81—85.

6. Makarov V. N., Potapov V. Ya., Davydov S. Ya., Makarov N. V. A method of additive aerodynamic calculation of the friction gear classification block. Refractions and Industrial Ceramics. 2017, vol. 38, no. 3, pp. 288—292. DOI: 10.1007/s11148-017-0098-8.

7. Borowski G., Smirnov Yu., Ivanov A., Danilov A. E. Effectiveness of carboxymethyl cellulose solutions for dust suppression in the mining industry. International Journal of Coal Preparation and Utilization. 2020, no. 1, pp 1—13. DOI: 10.1080/19392699.2020.1841177.

8. Makarov V. N., Ugolnikov A. V., Materov A. Yu., Makarov N. V., Tauger V. M. Modified criterion equation of hydro vortex dust suppression in coal mines. MIAB. Mining Inf. Anal. Bull. 2019, no. 7, pp. 53—61. [In Russ]. DOI: 10.25018/0236-1493-2019-07-0-53-61.

9. Valiev N. G., Simisinov D. I., Koshkarov V. E., Akhmetov A. F. Emulsive preventives from black oil for dust removal at opencast automobile roads and technogenic wastes. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2015, no. 8, pp. 13—21. [In Russ].

10. Torshizi S. A. M., Benisi A. H., Durali M. Multilevel optimization of the splitter blade profile in the impeller of a centrifugal compressor. Scientia Iranica. 2017, no. 24, pp. 707—714. DOI: 10.24200/sci.2017.4055.

11. Pelevin A. E., Sytykh N. A. The features of classification in hydrocyclones in the course of titanium magnetite ore grinding. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2021, no. 1, pp. 74—84. [In Russ]. DOI: 10.21440/0536-1028-2021-1-74-84.

12. Makarov V. N., Makarov N. V., Ugol’nikov A.V., Sverdlov I. V. Energy-efficient technology of technogenic accidents containment in mines based on a numerically simulated model of hydro vortex coagulation. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2019, no. 2, pp. 118—127. [In Russ]. DOI: 10.21440/0536-1028-2019-2-118-127.

13. Makarov V. N., Kosarev N. P., Makarov N. V., Ugol’nikov A.V., Lifanov A. V. Effective localization of coal dust explosions using hydro vortex coagulation. Vestnik Permskogo natsionalnogo issledovatelskogo politehnicheskogo universiteta. Geologiya. Neftegazovoye i gornoye delo. 2018, vol. 18, no. 2, pp. 78—189. [In Russ]. DOI: 10.15593/2224-9923/2018.4.7.

14. Nikolaev A. V. Energy efficient mine air conditioning in shallow mines. Gornyi Zhurnal. 2017, no. 3, pp. 71—74. [In Russ]. DOI: 10.17580/gzh.2017.03.13.

15. Yang S., Nie W., Lv S., Liu Z., Peng H., Ma X., Cai P., Xu C. Effects of spraying pressure and installation angle of nozzles on atomization characteristics of external spraying system at a fully-mechanized mining face. Powder Technology. 2019, vol. 343, pp. 754—764. DOI: 10.1016/j.powtec.2018.11.042.

16. Han H., Wang P., Liu R. Experimental study on atomization characteristics and dustreduction performance of four common types of pressure nozzles in underground coal mines. International Journal of Coal Science and Technology. 2020, vol. 7, no. 3, pp. 581—596. DOI: 10.1007/s40789-020-00329-w.

17. Wang P. Multi-objective design of a transonic turbocharger compressor with reduced noise and increased efficiency. Ph. D. Thesis. UCL University. London, 2017. 213 р.

18. Mao Y. F. Numerical study of correlation between the surge of centrifugal compressor and the piping system. Ph. D. Thesis. Xian Jiaotong University, Xian. 2016, 174 p.

19. Wu D., Yin K., Yin Q., Zhang X., Cheng J., Ge D., Zhang P. Reverse circulation drilling method based on a supersonic nozzle for dust control. Applied Sciences. 2017, vol. 7, no. 1, pp. 5—20. DOI: 10.3390/app7010005.

20. Lyashenko V. I., Gurin A., Topolniy F. F., Taran N. A. Justification of environmental technologies and means for dust control of tailing dumps surfaces of hydrometallurgical production and concentrating plants. Metallurgical and Mining Industry. 2017, no. 4, pp 8—17.

21. Bautin S. P. Mathematical simulation of the vertical part of an upward swirling flow. High Temperature. 2014, vol. 52, no. 2, pp. 259—263. DOI: 10.7868/S0040364414020033.

22. Torshizi S. A. M., Benisi A. H., Durali M. Numerical optimization and manufacturing of the impeller of a centrifugal compressor by variation of splitter blades. ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, Seoul, 2016, рр. 1—7.

23. Davydov S. Y., Valiev N. G., Tauger V. M. Effect of the flow of transported bulk material on design features of a belt conveyor. Refractories and Industrial Ceramics. 2019, vol. 60, no. 1, pp. 10—13. DOI: 10.1007/s11148-019-00301-5.

24. Makarov V. N., Makarov N. V., Ugolnikov A. V., Dyldin G. P., Churakov E. O. Patent RU 2737161 S1, 25.11.2020. [In Russ].

Our partners

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.