基于几种可燃粉尘自燃温度与燃烧速率的研究
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摘要
为探究可燃粉尘燃烧危险性,分别对红木粉、烟丝粉、石松子粉以及稻壳粉的自燃温度和燃烧速率进行试验。结果表明:75μm筛下的四种粉尘自燃温度分别是231.0、219.7、222.3、228.1℃;采用固体点火方式,测得石松子粉火焰传播速率为1.74 mm/s,其他三种粉尘点燃后两分钟内燃烧距离均未达到80 mm,判定该四种粉尘均不属于易燃固体。通过研究自燃温度对燃烧速率的影响发现:燃烧过程中,四种粉尘自燃温度对燃烧速率不起主导作用,二者表现为弱依赖关系。
In order to explore the combustion hazard of combustible dust,the auto-ignition temperature and the burning rates of rosewood dust,tobacco dust,lycopodium dust and rice husk dust were studied. The results show that the auto-ignition temperature of the four types of dust under 75 μm were 231.0,219.7,222.3 and 228.1℃respectively. The solid ignition method is successfully applied to analysis of the flame propagation rate. The flame propagation rate of lycopodium dust was 1.74 mm/s,but the other three kinds of dust did not reach 80 mm within two minutes after ignition. It is determined that all four types of dust were not flammable solids.By studying the effect of auto-ignition temperature on the burning rate,it is found that during the combustion process,four kinds of dust auto-ignition temperature do not play a leading role in the burning rate,and the both show a weak dependence.
In order to explore the combustion hazard of combustible dust,the auto-ignition temperature and the burning rates of rosewood dust,tobacco dust,lycopodium dust and rice husk dust were studied. The results show that the auto-ignition temperature of the four types of dust under 75 μm were 231.0,219.7,222.3 and 228.1℃respectively. The solid ignition method is successfully applied to analysis of the flame propagation rate. The flame propagation rate of lycopodium dust was 1.74 mm/s,but the other three kinds of dust did not reach 80 mm within two minutes after ignition. It is determined that all four types of dust were not flammable solids.By studying the effect of auto-ignition temperature on the burning rate,it is found that during the combustion process,four kinds of dust auto-ignition temperature do not play a leading role in the burning rate,and the both show a weak dependence.
引文
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[3]钟圣俊,周乐刚,王健.热表面上粉尘层阴燃的研究[J].燃烧科学与技术,2014,20(3):199-207.
[4]喻健良,孙会利,纪文涛,等.甲烷/石松子两相混合体系爆炸强度参数[J].爆炸与冲击,2018,38(1):92-97.
[5]李庆钊,王可,梅晓凝,等.微米级铝粉的爆炸特性及其反应机理研究[J].工程热物理学报,2017,38(1):219-225.
[6]谭迎新,李亚男.磷酸二氢铵对铝粉的爆炸抑制研究[J].中北大学学报(自然科学版),2015,36(4):458-461.
[7]沈世磊,张奇,马秋菊,等.湍流对铝粉爆炸特性的影响[J].兵工学报,2016,37(3):455-461.
[8]高伟,阿部俊太郎,荣建忠,等.气流特征对水平长管内石松子粉尘爆炸火焰结构的影响[J].爆炸与冲击,2015,35(3):372-379.
[9]Proust C H.A few fundamental aspects about ignition and flame propagation in dust clouds[J].Journal of Loss Prevention in the Process Industries,2006,19(2/3):104-120.
[10]何文修,张智亮,计建炳.稻壳生物质资源利用技术研究进展[J].化工进展,2016,35(5):1366-1376.
[11]黄荣凤,吕建雄,曹永建,等.高温热处理对毛白杨木材化学成分含量的影响[J].北京林业大学学报,2010,32(3):155-160.
[12]周乐刚.可燃粉尘热解动力学及阴燃过程模型研究[D].沈阳:东北大学,2013.
[13]郭小义,戴云辉,郭紫明,等.应用纤维素测定仪测定烟草中的纤维素[J].烟草科技,2009(1):43-46.