Drying of combustible powders – Risk & mitigation |
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| Institution: | 1. Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Imam Reza Street, P.O. Box 46414-356, Noor, Iran;2. Institute of Geophysics, Tehran University, North Karegar Ave., Tehran, Iran;3. Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, Canada;1. University of Tunis El Manar, Faculté des Sciences de Tunis, Laboratoire d''Energétique et des Transferts Thermique et Massique (LETTM), Tunisia;2. University of Lyon, Université Claude Bernard Lyon 1, Laboratoire d''Automatique et Génie des Procédés (LAGEP) UMR CNRS 5007, La Doua Campus, CPE Building, Villeurbanne, 69622, France;3. MERSEN Company, Saint Bonnet de Mûre, France;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People''s Republic of China;2. University of Chinese Academy of Sciences, Beijing 100049, People''s Republic of China |
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| Abstract: | This paper provides an overview of the various processes for drying combustible powders with particular emphasis on spray, fluid bed and ring dryers. Clients of FM Global, an industrial property insurance company, have experienced numerous explosion and fire losses in dryers and the primary causes and equipment involved in recent events are reviewed. Several case examples are provided. Key operating parameters that can impact the hazard created by processing combustible dusts are highlighted. For each dryer type the key controls, alarms and interlocks are addressed as well as the protection and mitigation features that can be installed. This will emphasize FM Global loss prevention guidelines but will also point out differences with NFPA and EU codes. |
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| Keywords: | Combustible dust Dryers Loss history Hazards Mitigation methods |
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