Minimum ignition energy of mixtures of combustible dusts |
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| Institution: | 1. Universitieit Leuven, Department of Mechanical Engineering, Celestijnenlann 300A, B3001 Leuven, Belgium;2. Adinex NV, Brouwerijstraat 5/3, B 2200 Noorderwijk, Belgium;1. Department of Energy and Fuels, Universidad Politecnica de Madrid, Alenza 4, 28003 Madrid, Spain;2. Department of Mechanical Engineering, Imperial College, SW7 1AZ London, United Kingdom;3. Energy Research Institute, School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK;4. Laboratorio Oficial Madariaga, LOM (Universidad Politecnica de Madrid, Spain) C/Eric Kandel, 1 – (TECNOGETAFE), Parque Científico y Tecnológico de la UPM, 28906 Getafe (Madrid), Spain;1. INERIS, Accidental Risks Division, Parc ALATA, BP 2, F-60550 Verneuil en Halatte, France;2. Laboratoire Réactions et Génie des Procédés, Université de Lorraine, UMR 7274 CNRS, 1 rue Granville, BP 20451, F-54001 Nancy, France;1. Politecnico di Torino, Dept. of Applied Science and Technology, C.so Duca degli Abruzzi 24, 10129 Torino, Italy;2. Alchim sas, Via Roma 23, 10023 Chieri, TO, Italy;1. Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica, “G. Natta”, via Mancinelli 7, 20131, Milano, Italy;2. Fike Corporation, 704 SW 10th Street, Blue Springs, MO, United States;3. Università degli Studi dell’Insubria, Dipartimento di Scienza e Alta Tecnologia, via G.B. Vico 46, 21100, Varese, Italy;1. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China;2. Department of Process Engineering & Applied Science, Dalhousie University, 1360 Barrington Street, P.O. Box 15000, Halifax, NS, B3H 4R2, Canada;3. Department of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China |
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| Abstract: | Most industrial powder processes handle mixtures of various flammable powders. Consequently, hazard evaluation leads to a reduction of the disaster damage that arises from dust explosions. Determining the minimum ignition energy (MIE) of flammable mixtures is critical for identifying possibility of accidental hazard in industry. The aim of this work is to measure the critical ignition energy of different kinds of pure dusts with various particle sizes as well as mixtures thereof.The results show that even the addition of a modest amount of a highly flammable powder to a less combustible powder has a significant impact on the MIE. The MIE varies considerably when the fraction of the highly flammable powder exceeds 20%. For dust mixtures consisting of combustible dusts, the relationship between the ignition energy of the mixture and the minimum ignition energy of the components follows the so-called harmonic model based upon the volume fraction of the pure dusts in the mixture. This correlation provides results which show satisfactory agreement with the experimental values. |
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| Keywords: | Minimum ignition energy Dust mixtures Dust explosion |
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