管道内纤维板粉尘云火焰传播特性研究  

Study on flame propagation characteristics of fiberboard dust cloud in Hartmann Tube

作　　者：周天添 何中其[1] 陈利平[1] ZHOU Tiantian;HE Zhongqi;CHEN Liping(School of Safety Science and Engineering,Nanjing University of Science and Technology,Nanjing Jiangsu 210094,China)

机构地区：[1]南京理工大学安全科学与工程学院,江苏南京210094

出　　处：《工业安全与环保》2025年第3期8-13,共6页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(22278226)。

摘　　要：为探究密度纤维板加工过程中产生的纤维板粉尘云火焰传播特性,采用自主搭建的粉尘云火焰传播测试平台,通过高速摄像设备记录火焰传播全过程,量化纤维板尘云从点燃到火焰传播至最大高度的传播过程,分别探讨粉尘质量浓度、粒径及管道长度对纤维板粉尘云火焰传播的影响。结果表明,在300 mm管道内喷粉压力为0.4 MPa,点火能量为5 J,点火延迟时间为60 ms条件下,纤维板粉尘云火焰传播最佳质量浓度为1000 g/m^(3),此时火焰传播距离为650.88 mm,火焰传播最大速度为5.73 m/s。粉尘粒径越小的纤维板粉尘云,其火焰传播受点火能量影响越大。管道长度及点火能量的增加均会导致火焰传播距离与速度增大。不同条件下纤维板粉尘火焰传播初始速度均在1.5 m/s左右。In order to investigate the flame propagation characteristics of fibreboard dust clouds generated during den-sity fibreboard processing,aself-built dust cloud flame propagation test platform was used.The whole process of flame propagation was recorded by high-speed camera to quantify the propagation process of fiberboard dust cloud from ig-nition to the maximum height,and to investigate the effects of dust mass concentration,dust particle size,and tube len-gth on the flame propagation of fiberboard dust cloud.The results show that under the conditions of powder spraying pressure of 0.4 MPa,ignition energy of 5 J,and ignition delay time of 60 ms in 300 mm tube,the optimal concentration of fiberboard dust cloud flame propagation is 1000 g/m^(3),the flame propagation distance is 650.88 mm,and the maxi-mum flame propagation velocity is 5.73 m/s.The flame propagation of fibreboard dust clouds with smaller particle si-zes is more affected by the ignition energy.The increase of tube length and ignition energy will lead to the increase of flame propagation distance and velocity.Under different conditions,the initial flame propagation velocity of fiber-board dust is about 1.5 m/s.

关 键 词：纤维板粉尘 哈特曼管 火焰传播 

分 类 号：X932[环境科学与工程—安全科学]