期刊
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
卷 57, 期 -, 页码 41-46出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jlp.2018.11.001
关键词
Dust explosion; Layer flammability level; Layer fires; Solid inertant; Fire hazard
资金
- National Key Research and Development Program [2016YFC0801703]
- National Natural Foundation of China [51374001, 51604175, 51474053]
- General Project of the Education Department of Liaoning Province [L20150181]
- Fundamental Research Funds for the Central Universities [N170108029]
Unlike metallic dust layers, the layer flammability levels (LFL) of non-metallic dust layers exhibit a wide range from Class 1 (No self-sustained combustion) to Class 6 (explosive combustion). However, determinations of layer flammability have not considered the effect of inclination angle, thereby potentially underestimating fire hazard of combustible dust layers in many industrial situations. In this research, inclined dust layers showed greater fire hazard than did horizontally oriented dust layers. For example, LFL of wood dust jumped from class 3 to class 5 when layers were positioned with an incline. Flame spread rate of PMMA dust layers increased from 1.8 to 3.6 mm/s when the angle of inclination increased from 0 to 40 degrees. Even small amounts of solid inertant significantly decreased surface layer fires. The required amount of inertant to completely inert layer fires was far less than that for smoldering layer fires or dust explosions.
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