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首页> 外文会议>Proceedings of the 43rd annual loss prevention symposium >PREVENTION AND MITIGATION OF POLYETHYLENE AND HYDROCARBON/POLYETHYLENE EXPLOSIONS
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PREVENTION AND MITIGATION OF POLYETHYLENE AND HYDROCARBON/POLYETHYLENE EXPLOSIONS

机译：聚乙烯和烃/聚乙烯爆炸的预防和缓解

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摘要

The research presented in this paper focuses on the importance of the prevention and mitigation of dust and hybrid mixture explosions. The main objective is to demonstrate the use of the inherent safety principle of moderation to achieve a degree of explosion risk reduction. Experiments and a companion modelling study were conducted with a test matrix composed of various size fractions of polyethylene powder and concentrations of hydrocarbon gas (ethylene, hexane and propane). The results quantitatively show the increased hazard posed by fine particle sizes of dust and admixture of flammable gas to a combustible dust. There are clear implications for industry in terms of moderating the risk of explosion.rnAdmixed gas concentrations used in this work were all less than the lean flammability limit (LFL) of the particular chemical species, and the ratio of gas concentration to LFL concentration was at least 75 %. The enhancement of mixture reactivity brought about by flammable gas admixture could therefore be correlated with the burning velocity of the gas - 46 cm/s for hexane and propane, and 80 cm/s for ethylene. Thus, with the experimental conditions used in the testing, propane and hexane were found to increase the size-normalized maximum rate of pressure rise, K_(st), to the same extent over the K_(st) of the polyethylene dust alone. An additional implication of the test results is the possible use of a gaseous surrogate (e.g. propane) for a solvent that is liquid at ambient conditions (e.g. hexane) in hybrid mixture testing.
机译：本文提出的研究重点在于预防和减轻粉尘和混合混合物爆炸的重要性。主要目的是演示使用节制的固有安全原理来实现一定程度的爆炸风险降低。使用由各种尺寸的聚乙烯粉末和不同浓度的碳氢化合物气体（乙烯，己烷和丙烷）组成的测试基质进行了实验和伴随模型研究。结果定量显示了细颗粒的粉尘和易燃气体与可燃粉尘的混合物所造成的危害增加。就降低爆炸风险而言，这对工业界有着明显的意义。rn本研究中使用的混合气体浓度均小于特定化学物质的稀燃性极限（LFL），且气体浓度与LFL浓度之比为至少75％。因此，由可燃气体混合物引起的混合物反应性的提高可与气体的燃烧速度相关-己烷和丙烷为46 cm / s，乙烯为80 cm / s。因此，在用于测试的实验条件下，发现丙烷和己烷在单独的聚乙烯粉尘的K_（st）上以相同的程度增加了尺寸归一化的最大压力上升率K_（st）。测试结果的另一个暗示是，在混合混合物测试中，可能使用气体替代物（例如丙烷）替代在环境条件下呈液态的溶剂（例如己烷）。

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  • 会议地点 Tampa FL(US);Tampa FL(US);Tampa FL(US)
  • 作者

    Paul Amyotte; Matthew Lindsay; Almerinda Di Benedetto; Paola Russo;

  • 作者单位

    Ruth Domaratzki Neil Marchand Process Engineering Applied Science Dalhousie University Halifax, Nova Scotia Canada B3J 2X4;

    Ruth Domaratzki Neil Marchand Process Engineering Applied Science Dalhousie University Halifax, Nova Scotia Canada B3J 2X4;

    Consiglio Nazionale delle Ricerche Napoli, Italy;

    Dipartimento di Ingegneria Chimica e Alimentare Universita di Salerno Salerno, Italy;

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