燃烧废气对粉末涂料/空气混合物爆炸的惰化作用  

Inerting effects of flue gas on explosion of powder coating/air mixtures

作　　者：石永国 唐庆 胡斯源 丁超[2] 王信群[2] SHI Yongguo;TANG Qing;HU Siyuan;DING Chao;WANG Xinqun(Zhejiang Academy of Safety Science and Technology,Hangzhou Zhejiang 310012,China;Institute of Safety Engineering,China Jiliang University,Hangzhou Zhejiang 310018,China)

机构地区：[1]浙江省应急管理科学研究院,浙江杭州310012 [2]中国计量大学安全工程研究所,浙江杭州310018

出　　处：《中国安全科学学报》2021年第11期71-77,共7页China Safety Science Journal

基　　金：国家国际科技合作专项(2013DFG71760)。

摘　　要：为提高静电涂装过程中粉末涂料爆炸防控的针对性,采用截面80 mm×80 mm、高度800 mm的爆炸试验平台,研究有机及无机颜料粉末涂料的爆炸传播特性,以及施加天然气燃烧废气的惰化防爆效果。结果表明:有机颜料可促进粉末涂料爆炸传播,致使火焰传播速度峰值由4.8 m/s提高至7.5 m/s;施加天然气燃烧废气,对无机、有机颜料粉末涂料/空气混合物爆炸火焰传播均有惰化效能,但其作用方式存在一定差别,前者爆炸强度随燃烧废气施加量呈渐进式衰减,而有机颜料粉末涂料,当氧含量降至18%时,仅使点燃时间延迟,爆炸火焰传播速度峰值未明显降低,而氧含量降至15%时,点燃难度骤升,火焰传播不能自持。In order to improve explosion control effectiveness of powder coatings during electrostatic spraying process,an experimental platform with a size of 80 mm×80 mm for cross profile and 800 mm at height was designed,explosion propagation characteristics of coatings with organic and inorganic pigment additions were studied,and inerting and anti-explosion effects of flue gas were explored.The results show that flame propagation of powder coating can be accelerated significantly with organic pigments addition,causing its peak velocity to rise from 4.8 m/s to 7.5 m/s.Applying flue gas can suppress it for both powder coating/air mixtures with inorganic and organic pigments,but in a different way.For the former case,explosion intensity progressively attenuates along with increase of flue gas volume,while for the latter,there is only a delay in ignition time,and peak velocity of flame propagation exhibits no obvious reduction when oxygen content drops to 18%.However,when the content is 15%,ignition difficulty will increase sharply,and self-sustained flame propagation will disappear.

关 键 词：燃烧废气 粉末涂料 惰化作用 爆炸火焰传播 交联固化 粉尘/空气混合物 

分 类 号：X932[环境科学与工程—安全科学]