七氟丙烷抑制甲烷空气预混气体爆炸的实验研究

发布时间：2018-01-29 08:15

本文关键词： 七氟丙烷抑爆浓度最大爆炸压力最大压力上升速率峰值压力时间　出处：《矿业安全与环保》2017年01期 　论文类型：期刊论文

【摘要】：为寻找既环保又能抑制瓦斯爆炸的气体抑爆介质,解决瓦斯输送过程中的爆炸安全问题,分析了七氟丙烷作为抑爆介质的抑爆机理,并采用20 L爆炸特性测试系统,研究了不同体积分数的七氟丙烷对甲烷体积分数为9.5%的甲烷空气预混气体最大爆炸压力、最大压力上升速率和峰值压力的影响。研究发现:在实验条件下,点火延迟时间为60 ms时,七氟丙烷抑制甲烷空气预混气体爆炸的最低体积分数为17.4%;七氟丙烷体积分数为5%~17%时,随着其体积分数的增大,最大爆炸压力逐渐升高,最大压力上升速率增大,对甲烷空气预混气体爆炸有促进作用。研究表明,七氟丙烷可作为新型环保气体抑爆介质抑制瓦斯爆炸,但在使用过程中应根据使用场所合理确定七氟丙烷的用量。
[Abstract]:In order to find out the gas explosion suppression medium which can not only protect the environment but also suppress the gas explosion and solve the explosion safety problem in the process of gas transportation, the mechanism of heptafluoropropane as the explosion suppression medium is analyzed. The maximum explosion pressure of heptafluoropropane with different volume fraction on methane air premixed gas with methane volume fraction of 9.5% was studied by using a 20L explosion test system. The effects of the maximum pressure rise rate and peak pressure. It is found that under the experimental conditions, the ignition delay time is 60 Ms. The lowest volume fraction of heptafluoropropane to suppress methane air premixed gas explosion is 17.4g; When the volume fraction of heptafluoropropane is 5 ~ 17, with the increase of the volume fraction, the maximum explosion pressure increases gradually, and the maximum pressure rise rate increases. The study shows that sevofluropropane can be used as a new type of environmental gas explosion suppression medium to suppress gas explosion. However, the dosage of heptafluoropropane should be reasonably determined according to the place of use.
【作者单位】：中煤科工集团重庆研究院有限公司;
【基金】：中国煤炭科工集团有限公司科技创新基金面上项目(2014MS007)
【分类号】：TD712.7
【正文快照】： 自动抑爆技术是用于控制瓦斯爆炸的新兴技术,其通过对爆炸信息的自动探测,以及一系列快速的控制、触发动作喷撒出抑爆介质,形成抑爆屏障,抑制瓦斯爆炸,并将爆炸控制在初始阶段,降低事故灾害损失。干粉是一种粉体抑爆介质,是目前应用最广泛的抑爆介质,其以磷酸铵盐为主要基料,

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