摘要：为评价木粉着火爆炸危险性,保证安全生产,采用GodbertGreenwald恒温炉研究粉尘浓度、粒径及分散压力对木粉尘云最低着火温度的影响。结果表明:木粉着火敏感质量浓度为424 g/m³,此浓度下最低着火温度为402℃;粉尘粒径从38μm变化到45μm时,木粉最低着火温度由474℃升高到541℃;粉尘质量恒定为100 mg,分散压力由20 kPa升高到50 kPa,木粉最低着火温度由402℃变化为440℃。

关键词：粉尘爆炸；木粉；最低着火温度；分散压力

Abstract： To evaluate the explosion hazard of wood dust cloud and ensure safety in production, Godbert -Greenwald furnace apparatus was used to study the influence of dust concentration, particle size and diffusing pressure on the minimum ignition temperature of wood powders. The experimental results show that the sensitive mass concentration of wood powders is 424 g/m³, the minimum ignition temperature at this concentration is 402 ℃ . When the dust particle size changes from 38 to 45 μm, the minimum ignition temperature increase from 474 to 541℃. When the dust mass is 100 mg, diffusing pressure changes from 20 to 50 kPa, the minimum ignition temperature increases from 402 to 440 ℃. 

Keywords: dust explosion; wood powders; minimum ignition temperature; diffusing pressure