EXPERIMENTAL STUDY OF MINIMUM IGNITION TEMPERATURE

Transactions of the VŠB: Technical University of Ostrava, Safety Engineering Series

Aleš HÁZ¹  Karol BALOG²  Hana KOBETIČOVÁ²  Igor WACHTER² 

[1]Slovak University of Technology, Faculty of Chemical and Food Technology, Bratislava, Slovak Republic

[2]Slovak University of Technology, Faculty of Materials Science and Technology in Trnava, Trnava, Slovak Republic

关键词: Coffee grounds;    Minimum ignition temperature;    Carbonating;    Dust layer;    Dust cloud;   

DOI  :  10.1515/tvsbses-2015-0006

来源: DOAJ

【 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).

【 授权许可】

Unknown