木粉最低着火温度的实验研究
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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℃。
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 ℃.
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 ℃.
引文
[1]POLKA M.Experimental analysis of minimum ignition temperature of a dust layer and clouds on a heated surface of selected flammable dusts[C]//Procedia Engineering,2012:414-423.
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[4]李刚,刘晓燕.粮食伴生粉尘最低着火温度的实验研究[J].东北大学学报:自然科学版,2005,26(2):145-147.
[5]MINTZ K J.Problems in experimental measurement of dust explosions[J].Journal of Hazardous Materials,1995,42:177-186.
[6]王海福,郑珊,冯顺山,等.粉尘云最小点火温度测试实验系统设计[J].中国安全科学学报,2001,11(6):52-54.
[7]IEC 1241-2-1—1994,Methods for determining the minimum ignition temperatures of dust:Method B:dust cloud in a furnace at a constant temperature[S].Geneva,Switzerland:International Electrotechnical Commission,1994.
[8]张瑞萍.对粉尘云最低点火温度概念的几点认识[J].火工品,1998(1):34-37.
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[10]钟英鹏,徐冬,李刚,等.镁粉尘云最低着火温度的实验测试[J].爆炸与冲击,2009,29(4):429-433.
[2]胡双启,张景林.燃烧与爆炸[M].北京:兵器工业出版社,1992.
[3]解立峰,余永刚.防火与防爆工程[M].北京:冶金工业出版社,2010.
[4]李刚,刘晓燕.粮食伴生粉尘最低着火温度的实验研究[J].东北大学学报:自然科学版,2005,26(2):145-147.
[5]MINTZ K J.Problems in experimental measurement of dust explosions[J].Journal of Hazardous Materials,1995,42:177-186.
[6]王海福,郑珊,冯顺山,等.粉尘云最小点火温度测试实验系统设计[J].中国安全科学学报,2001,11(6):52-54.
[7]IEC 1241-2-1—1994,Methods for determining the minimum ignition temperatures of dust:Method B:dust cloud in a furnace at a constant temperature[S].Geneva,Switzerland:International Electrotechnical Commission,1994.
[8]张瑞萍.对粉尘云最低点火温度概念的几点认识[J].火工品,1998(1):34-37.
[9]吴洁红.固体(粉状)乳化炸药粉尘最低着火实验研究[J].煤矿爆破,1997(1):5-8.
[10]钟英鹏,徐冬,李刚,等.镁粉尘云最低着火温度的实验测试[J].爆炸与冲击,2009,29(4):429-433.