An experimental setup was established according to IEC standard to investigate 8 kinds of dust concomitant with grain for their MITs of dust cloud and layer(MITC and MITL), which were sampled in-situ from actual grain processing line.
按照IEC标准建立了工业粉尘云和粉尘层最低着火温度(MIT)测试装置,对8种取自工业现场的粮食伴生粉尘进行了粉尘云和粉尘层MIT实验测试,并对灰分、粒径、水分对MIT的影响进行了实验研究和分析·发现粮食储运系统后期工艺比早期危险,按照粮食精粉或淀粉实验数据进行工业实际防爆设计的安全裕度过大,并提出了可行的防爆温度组别·所得结论为粮食行业的防爆设备选型提供了实验依据,对于粉尘着火和爆炸危险性评价具有借鉴意义
In order to explore the structure and reaction behavior of the combustion zone propagating through PMMA particle cloud, the direct emission of flame and laser light scattering images of the particles were recorded by CCD and high speed video camera.
以揭示可燃粉尘云中传播火焰的基本结构和燃烧反应区的反应特性为目的 ,用 CCD和高速摄像仪拍摄了 PMMA粉尘云中传播火焰的自发光和粒子的激光散射图片 ,结合离子探针和微细热电偶测试技术 ,根据实测结果分析了有机可燃物 PMMA粉尘云中传播火焰的基本结构 ;揭示了燃烧反应区的反应特性、反应强度分布规律和温度分布规