铝粉最小点火能实验研究  

Experimental Study of Aluminium Minimum Ignition Energy

作　　者：丁莉英 李晓泉[1] 李明菊[1] 凡柯 许大洋[1] 王兄威 DING Liying LI Xiaoquan LI Mingju FANG Ke XU Dayang WANG Xiongwei(College of Resources and Metallurgy, Guangxi University Nanning 53000)

机构地区：[1]广西大学资源与冶金学院,南宁530004

出　　处：《工业安全与环保》2017年第10期34-37,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(41402306);广西安全生产科技项目(gxaj201405)

摘　　要：为了研究点火延迟时间、喷尘压力、粉尘浓度和铝粉粒径对铝粉最小点火能的影响,本文利用1.2L哈特曼管实验装置对200~500目的铝粉最小点火能进行测试,得出结论如下:实验测得铝粉最小点火能为38.6~48.9m J,最佳喷粉压力为110k Pa、粉尘敏感浓度为750 g/m^3;根据拟合函数求得铝粉最佳喷尘压力为104k Pa,铝粉敏感浓度为758 g/m^3。试验数据和拟合数据接近,试验可靠。铝粉最小点火能随着点火延迟时间、喷粉压力、粉尘浓度的增大先降低后增大;铝粉最小点火能随着粒径的减少而减小。In order to study the effects of ignition delay time, dusting pressure, dust concentration and aluminum powder particle size on aluminum dust cloud minimum ignition energy, 200 to 500 mesh aluminum dust minimum ignition energy is tested with 1.2L Hartmann tube experimental device in the paper. The results show that aluminum dust minimum ignition energy is 38.6 ~ 48.9 mJ, the optimum dusting pressure is 110 kPa and the sensitive dust concentration is 750 g/m3. According to the fitting function, it is obtained the data that the best dust spray pressure is 104 kPa and aluminum sensitive concentration is 758 g/m3. The test data is close to the fitting data and so the experiment is reliable. Aluminum dust cloud minimum ignition energy decreases at first and then increases with the increase of ignition delay time, dusting pressure and dust concentration. Aluminum dust cloud minimum ignition energy decreases with the decrease of powder particle size.

关 键 词：铝粉 最小点火能 点火延迟时间 喷尘压力 粉尘浓度 粒径 

分 类 号：X932[环境科学与工程—安全科学]