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Title: NEW ASPECTS OF EXPLOSIVE CHARACTERISTICS OF HYBRID MIXTURES OF DUST/GAS DISPERSIONS
NEW ASPECTS OF EXPLOSIVE CHARACTERISTICS OF HYBRID MIXTURES OF DUST/GAS DISPERSIONS

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Matous Helegda; Iris Helegda ; Jan Skrinsky; Katerina Kubricka ; Jiri Pokorny
10.5593/sgem2023V/4.2/s17.55
10.5593/sgem2023v/4.2
1314-2704
978-619-7603-65-1
English
23
4.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Modern Energy and Power Sources
A small amount of flammable gas mixed with dust can cause a large explosion with serious consequences. In this study, explosions of hybrid mixtures will be performed in an explosion chamber with a volume of 0.02 m3 and 1.00 m3. Research into testing the explosion characteristics of hybrid mixtures is usually conducted under standard conditions. Testing the explosion characteristics of hybrid mixtures at higher initial temperatures has already been presented in several earlier studies. Hybrid mixtures are created and occur, for example, in biomass gasification technology, which is located at VSB-TU Ostrava, where synthetic gas is the output of the entire technology. In technology, the hybrid mixture can be created in a “hot filter”, where a working temperature of 450 °C is required. This technology is not unique, similar gasification technologies are found in other academic or industrial fields in the world. However, they may differ slightly from each other. Given that there is currently a noticeable shift away from fossil fuels and the search for different alternatives, it is possible that these gasification technologies will increase in the world. With this, the risks resulting from the use of these technologies will also increase, i.e. the risks of fires and explosions (and not only from potential hybrid mixtures created in these technologies). In this study, the effect of further increasing the initial temperatures will be presented. It was found that as the temperature increases, the values of the explosion characteristics decrease. This has a major impact on the determination of explosion characteristics in industrial plants (e.g. in the food industry or biomass gasification technologies) where non-standard conditions occur.
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[4] JANOVSKY, B., SKRINSKY J., CUPAK J., VERES J. Coal dust, Lycopodium and niacin used in hybrid mixtures with methane and hydrogen in 1m3 and 20 l chambers, Journal of Loss Prevention in the Process Industries, Volume 62, pp., 2019.
[5] EN 14034-1+A1. Determination of explosion characteristics of dust clouds – Part 1: Determination of the maximum explosion pressure pmax of dust clouds. European Committee for Standardization, 2011, 24 pp. Classification code 38 9604.
[6] EN 14034-2+A1. Determination of explosion characteristics of dust clouds –Part 2: Determination of the maximum rate of explosion pressure rise (dp/dt)max of dust clouds. European Committee for Standardization, 2011, 28 pp. Sorting code 38 9604.
[7] EN 15967. Determination of the maximum explosion pressure and the maximum rate of pressure rise of gases and vapours. European Committee for Standardization, 2022, 36 pp. Sorting code 38 9662.
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This work was supported by the Student’s Grant Competition, VSB – TU Ostrava, reg. no. SP2023/014, under the project “Verification of the effectiveness of overpressure ventilation of protected escape routes by the selected fire model”.
conference
https://doi.org/10.5593/sgem2023V/4.2/s17.55
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
463-470
28-30 November, 2023
website
9481
hybrid mixture, dispersion, gas, explosion