甲烷含量对塑料粉尘空气混合物爆炸特性的影响
发布时间：2018-07-20 15:25
【摘要】：为探究可燃气体的添加对塑料粉尘/空气混合物爆炸特性的影响,以聚甲基丙烯酸甲酯(PMMA)和热塑性聚氨酯弹性体(TPU)2种塑料粉尘为研究对象,在对其进行热重分析(TG)的基础上,利用20 L球形爆炸试验装置,研究甲烷体积分数对这2种塑料粉尘/空气混合物爆炸压力、爆炸压力上升速率、爆炸下限等特征参数的影响。热重试验结果表明:PMMA粉体分解速率高,在外界供热条件下易发生燃烧,而TPU粉体分解所需能量更多,分解更加困难。爆炸试验结果表明:在试验选定的粉尘浓度条件下,2种粉尘爆炸压力及压力上升速率均随粉尘浓度呈现先升高后降低的变化趋势;当甲烷体积分数从0增加到4%时,塑料粉尘爆炸的猛度和敏感度随之增加,其中PMMA粉尘爆炸猛度受甲烷影响更大,而TPU粉尘基本不受影响,但其爆炸下限下降更明显。
[Abstract]:In order to investigate the effect of combustible gas addition on the explosion characteristics of plastic dust / air mixture, two kinds of plastic dust, poly (methyl methacrylate) (PMMA) and thermoplastic polyurethane elastomer (TPU), were studied on the basis of thermogravimetric analysis (TG). The effects of methane volume fraction on the explosion pressure, explosive pressure rise rate and explosion lower limit of the two kinds of plastic dust / air mixtures were studied by using a 20L spherical explosion test device. The results of thermogravimetric test show that the decomposition rate of the powder is high, and it is easy to burn under the condition of external heating, while the decomposition of TPU powder requires more energy and is more difficult to decompose. The results of explosion test show that under the selected dust concentration, the explosion pressure and pressure rising rate of two kinds of dust show a tendency of increasing first and then decreasing with the concentration of dust, and when the volume fraction of methane increases from 0 to 4, The explosion intensity and sensitivity of plastic dust increased, and the explosion intensity of PMMA dust was more affected by methane than TPU dust, but the lower limit of explosion was more obvious.
【作者单位】： 中国计量学院质量与安全工程学院;
【基金】：国家自然科学基金资助(51174182) 国家国际科技合作专项(2013DFG71760)
【分类号】：X932
本文编号：2133964
[Abstract]:In order to investigate the effect of combustible gas addition on the explosion characteristics of plastic dust / air mixture, two kinds of plastic dust, poly (methyl methacrylate) (PMMA) and thermoplastic polyurethane elastomer (TPU), were studied on the basis of thermogravimetric analysis (TG). The effects of methane volume fraction on the explosion pressure, explosive pressure rise rate and explosion lower limit of the two kinds of plastic dust / air mixtures were studied by using a 20L spherical explosion test device. The results of thermogravimetric test show that the decomposition rate of the powder is high, and it is easy to burn under the condition of external heating, while the decomposition of TPU powder requires more energy and is more difficult to decompose. The results of explosion test show that under the selected dust concentration, the explosion pressure and pressure rising rate of two kinds of dust show a tendency of increasing first and then decreasing with the concentration of dust, and when the volume fraction of methane increases from 0 to 4, The explosion intensity and sensitivity of plastic dust increased, and the explosion intensity of PMMA dust was more affected by methane than TPU dust, but the lower limit of explosion was more obvious.
【作者单位】： 中国计量学院质量与安全工程学院;
【基金】：国家自然科学基金资助(51174182) 国家国际科技合作专项(2013DFG71760)
【分类号】：X932
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相关期刊论文 前2条
1 Ｐ．渥伦斯基;粉尘—空气混合物的最小爆炸浓度[J];中国安全科学学报;1995年03期
2 ;[J];;年期
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