Stasevych R.K., Zberovskyi V.V., Vlasenko V.V., Tyshchenko Ye.M., Savochenko R.O., Yelatontsev D.O. Automated system for control and monitoring of explosion safety of the coal grinding process in ball drum mills

Details

Parent Category: Geo-Technical Mechanics, 2023

Category: Geo-Technical Mechanics, 2023, Issue 167

 

Geoteh. meh. 2023, 167, 89-99

https://doi.org/10.15407/geotm2023.167.089 

 

AUTOMATED SYSTEM FOR CONTROL AND MONITORING OF EXPLOSION SAFETY OF THE COAL GRINDING PROCESS IN BALL DRUM MILLS

¹Stasevych R.K., ¹Zberovskyi V.V., ¹Vlasenko V.V., ²Tyshchenko Ye.M., ²Savochenko R.O., ³Yelatontsev D.O.

¹M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, ²“DIYA” Limited Liability Company, ³Dniprovsk State Technical University

UDC 681.51+622.73

Language: English

Abstract.  The article presents the results of research on automated systems of control and monitoring of explosion safety of dust and gas mixture during coal grinding in ball drum mills (BDM). The problem of the gas-dynamic factor, which arises at the disintegration of coals of middle stage of metamorphism (gas coals) in the atmosphere of closed or limited space, for example in mine workings, chambers, furnace furnaces, etc., is considered. Earlier, when burning anthracite coals, such a problem did not arise, since anthracite does not have a gas component of hydrocarbons. Therefore, all automated control systems were developed from the condition of grinding quality and optimal loading of the BDM. The work aims to develop an automated system of control and monitoring of explosion safety of coal-gas mixture in ball drum mills in the process of grinding gas coals in preparation for combustion. It is established that the sizes of coal grinding fractions in the BDMs from 50 microns to 250 microns correspond to the sizes of supermelonites from 10 microns to 200 microns to particles that are formed during sudden coal and gas emissions in mines. Coal supermelonites are the main source of gas emission into the atmosphere of mine workings, as at their formation there is the disintegration of the supramolecular organization of coal macromolecule and generation of methane. Crushing of gas coals in the BDM inevitably leads to the formation of the explosive methane-coal mixture, which further enters the furnace of the boiler unit. As a result, a new functional scheme for automatic regulation and optimization of parameters of the BDM with a measuring and computing system for controlling the temperature of the gas medium, pressure drop, and a self-tuning microprocessor controller was developed. A technological scheme for installing control and measuring equipment has been developed for preparing coal for burning in a thermal power plant boiler unit. Explosion safety control in the technological cycle of preparing gas coals for burning is carried out constantly using methane and oxygen concentration sensors. The operability of the control system was confirmed on the industrial mill of the boiler unit BKZ-160-100PT TPP of "Kramatorskteploenergo" TPP.
Keywords: ball drum mill, coal grinding, methane, explosion safety, control system.

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About the authors:

Stasevych Ryshard Kazimirovych, Doctor of Technical Sciences (D.Sc.), Senior Researcher in Department of Underground Coal Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Zberovskyi Vasyl Vladyslavovych, Doctor of Technical Sciences (D.Sc.), Senior Researcher in Department of Underground Coal Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Vlasenko Vasyl Victorovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher of Department of Underground Coal Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Tyshchenko Yevhen Mykolaiovych, Researcher in the Scientific and Innovative Enterprise LLC “DІIA” (LLC NPC “DІIA”), Kamianske, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Savochenko Roman Oleksiovych, Junior Researcher in the Scientific and Innovative Enterprise LLC “DІIA” (LLC NPC “DІIA”), Kamianske, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Yelatontsev Dmytro Oleksandrovych, Candidate of Technical Sciences (Ph.D.), Associate Professor, Associate Professor of the Department of Chemical and Biological Technologies, Dnipro State Technical University under the Ministry of Education and Science of Ukraine (DSTU, MSE of Ukraine), Kamianske, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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