期刊名称：TRANSACTIONS of the VŠB – Technical University of Ostrava, Safety Engineering Series
印刷版ISSN：1801-1764
电子版ISSN：1805-3238
出版年度：2015
卷号：10
期号：2
页码：1-7
DOI：10.1515/tvsbses-2015-0006
语种：English
出版社：Walter de Gruyter GmbH
摘要：The aim of this scientific paper is an analysis of the minimum ignition temperature of dust layer and the minimum ignition temperatures of dust clouds. It could be used to identify the threats in industrial production and civil engineering, on which a layer of combustible dust could occure. Research was performed on spent coffee grounds. Tests were performed according to EN 50281-2-1:2002 Methods for determining the minimum ignition temperatures of dust (Method A). Objective of method A is to determine the minimum temperature at which ignition or decomposition of dust occurs during thermal straining on a hot plate at a constant temperature. The highest minimum smouldering and carbonating temperature of spent coffee grounds for 5 mm high layer was determined at the interval from 280 °C to 310 °C during 600 seconds. Method B is used to determine the minimum ignition temperature of a dust cloud. Minimum ignition temperature of studied dust was determined to 470 °C (air pressure - 50 kPa, sample weight 0.3 g).
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