Spiridonov E.K., Ismagilov A.R., Khabarova D.F. Research and Development of a Pneumatic Shut-Off Device of an Ejection Type to Prevent the Exhaust of Hazardous Gases

DOI: 10.18503/1995-2732-2023-21-1-100-108

Abstract

The Chelyabinsk Region is home to many industrial companies, applying various heat and mass transfer facilities, namely reactors of fuming furnaces, basic oxygen furnaces, bubble columns, heterogeneous catalysis and chemical synthesis facilities, etc. The said facilities operate with chemical reactions at pressure and high temperatures accompanied by phase transitions. The products of these reactions make up a significant share of hazardous environmental emissions during the charging of bulk material into the internal chamber of the reactor. A mechanical shut-off device is open when charging. The chemical reactions take place at excessive pressure, which leads to the exhaust of hazardous gases through the charging opening. At the same time, the operation of mechanical shut-off devices is associated with relatively frequent failures. The paper presents a pneumatic ejection-type shut-off device that does not contain moving mechanical parts as an alternative to a mechanical shut-off device. Hazardous emissions are prevented by a countercurrent high-speed air jet from the nozzle of the shut-off device into the charging tube, which is also a mixing chamber of the ejector. This significantly reduces environmental pollution. Moreover, injection of additional air into the reactor through the ejector device intensifies the chemical processes in the reactor. A complex gasdynamic process of mixing active and passive gas or mixture flows takes place in such pneumatic shut-off device. There is no available theory for calculating ejection-type pneumatic shut-off devices. This paper presents a mathematical model of the operating process and a calculation method for designing an ejection-type pneumatic shut-off device, which allows developing pneumatic gates with minimum required air consumption.

Keywords

exhaust, hazardous gases, shut-off device, ejector, pneumatic gates, mathematical model, characteristics, calculation method

For citation

Spiridonov E.K., Ismagilov A.R., Khabarova D.F. Research and Development of a Pneumatic Shut-Off Device of an Ejection Type to Prevent the Exhaustof Hazardous Gases. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2023, vol. 21, no. 1, pp. 100-108. https://doi.org/10.18503/1995-2732-2023-21-1-100-108

Evgeniy K. Spiridonov – DrSc (Eng.), Head of the Department of Hydraulics and Hydraulic and Pneumatic Systems, Senior Researcher, South Ural State University, Chelyabinsk, Russia. Еmail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-5268-6292

Aleksandr R. Ismagilov – PhD (Eng.), Associate Professor, Researcher, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-6538-0727 vDarya F. Khabarova – PhD (Eng.), Associate Professor, Researcher, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0003-0251-0138

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