超细聚苯乙烯微球粉体的燃爆特性研究
发布时间：2018-10-12 07:38
【摘要】：为研究超细聚苯乙烯微球粉体的燃爆特性,通过粉尘层最低着火温度测试装置、MIE-D1.2最小点火能测试装置、20 L球形爆炸测试装置,对其最低着火温度、最大爆炸压力、最小点火能量(MIE)等爆炸特性参数进行测定,探讨了加热温度、点火延滞时间、粉尘质量浓度、粉尘粒径对粉体燃爆特性的影响。结果表明:超细聚苯乙烯微球粉尘层在350℃左右时会发生无焰燃烧,且加热温度越高,粉体粒径越小,粉尘层发生着火时所需的时间越短;当粉体质量浓度为250 g/m3时,最大爆炸压力达到0.65 MPa,质量浓度为500 g/m3时,最大爆炸压力的上升速率达90 MPa/s以上;随点火延滞时间增加,最小点火能表现出先缓慢减小再急剧增大的规律;随粉尘质量浓度增加,最小点火能逐渐降低,当粉尘质量浓度超过500g/m3后逐渐趋于稳定。
[Abstract]:In order to study the detonation characteristics of ultrafine polystyrene microspheres, the minimum ignition temperature of dust layer, the minimum igniting energy of MIE-D1.2, the 20 L spherical explosion test device were used to test the minimum ignition temperature and the maximum explosion pressure of the powder. The effects of heating temperature, ignition delay time, dust mass concentration and particle size on the detonation characteristics of powder were investigated. The results show that flameless combustion occurs at 350 鈩，
本文编号：2265317
[Abstract]:In order to study the detonation characteristics of ultrafine polystyrene microspheres, the minimum ignition temperature of dust layer, the minimum igniting energy of MIE-D1.2, the 20 L spherical explosion test device were used to test the minimum ignition temperature and the maximum explosion pressure of the powder. The effects of heating temperature, ignition delay time, dust mass concentration and particle size on the detonation characteristics of powder were investigated. The results show that flameless combustion occurs at 350 鈩，
本文编号：2265317
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