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Effect of particle size and flammable gas concentration on polyethylene explosions.

机译:粒径和可燃气体浓度对聚乙烯爆炸的影响。

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摘要

Laboratory-scale experiments were conducted in a Siwek 20-L chamber, MIKE 3 apparatus and BAM oven. From these pieces of equipment, the effect of particle size on two polyethylene dust samples was determined. To establish the effect of particle size, the following explosion characteristics were determined: minimum explosible concentration (MEC), minimum ignition energy (MIE), minimum ignition temperature (MIT), maximum explosion pressure (Pmax), maximum rate of pressure rise (dP/dt)max and size-normalized maximum rate of pressure rise (KSt).From the experimental data, it was determined that as the particle size of polyethylene decreased, the material hazard increased. Also, it was found that the addition of 2% and 5% ethylene further increased the material hazard. Based on the increased material hazard associated with these two phenomena, the ways in which the hazard could be mitigated were discussed. Inherent and engineered safety methodologies were considered to determine how the material hazard could be mitigated or eliminated completely.Following determination of the effect of particle size, hybrid mixture experiments were conducted using the Siwek 20-L chamber. The maximum explosion pressure (Pmax) and maximum rate of pressure rise (dP/dt) max were determined for 2% and 5% ethylene addition (by volume).
机译:在Siwek 20-L室内,MIKE 3仪器和BAM烤箱中进行实验室规模的实验。从这些设备中,确定粒度对两个聚乙烯粉尘样品的影响。为了确定颗粒大小的影响,确定了以下爆炸特性:最小爆炸浓度(MEC),最小点火能量(MIE),最小点火温度(MIT),最大爆炸压力(Pmax),最大压力上升率(dP) / dt)max和尺寸归一化的最大压力上升率(KSt)。根据实验数据,可以确定,随着聚乙烯颗粒尺寸的减小,材料危害也增加。另外,发现添加2%和5%的乙烯进一步增加了材料危害。基于与这两种现象相关的增加的物质危害,讨论了减轻危害的方法。考虑使用固有的工程安全方法来确定如何完全减轻或消除材料危害。在确定粒径影响之后,使用Siwek 20-L室进行了混合混合物实验。对于2%和5%的乙烯添加量(体积),确定了最大爆炸压力(Pmax)和最大压力升高速率(dP / dt)max。

著录项

  • 作者

    Marchand, Neil.;

  • 作者单位

    Dalhousie University (Canada).;

  • 授予单位 Dalhousie University (Canada).;
  • 学科 Engineering Chemical.
  • 学位 M.A.Sc.
  • 年度 2008
  • 页码 125 p.
  • 总页数 125
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 非洲史;
  • 关键词

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