Abstract
The present work analyses the tendency of ignition of the “Barbara” coal dust from a heated surface. Minimum coal dust layer ignition temperature was measured at a fixed temperature of heating plate (standard method) and at temperature of the heating plate increasing at constant rate. Dust layers of thickness ranging from 5 to 50 mm were tested. Permissible temperature of surfaces of electrical equipment were determined on the basis of PN-EN 60079-14 standard requirements concerning the method of lowering the permissible equipment surface temperature along with the increasing thickness of the layer from 5 mm to 50 mm in order to maintain an adequately high safety margin. Based on the results, significant differences were found for both methods of determination. For a 5 mm dust layer, the permissible temperature of equipment differed by ca. 140 °C and they decreased as the layer thickness rose, down to ca. 40 °C for a 50 mm dust layer.
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The study was funded by the National Centre for Research and Development under project no. DOB-BIO9/18/01/2018.
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Kukfisz, B., Siuta, D., Szaferski, W. (2020). Analysis of Coal Dust Ignition Deposited in a Layer at Constant and Variable Temperature of Heating Panel. In: Ochowiak, M., Woziwodzki, S., Mitkowski, P., Doligalski, M. (eds) Practical Aspects of Chemical Engineering. PAIC 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-39867-5_22
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DOI: https://doi.org/10.1007/978-3-030-39867-5_22
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