中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (11): 71-77.doi: 10.16265/j.cnki.issn 1003-3033.2021.11.010

• 安全工程技术 • 上一篇    下一篇

燃烧废气对粉末涂料/空气混合物爆炸的惰化作用*

石永国1 正高级工程师, 唐庆2, 胡斯源1 高级工程师, 丁超2, 王信群**2 教授   

  1. 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
  • 收稿日期:2021-08-15 修回日期:2021-10-11 出版日期:2021-11-28 发布日期:2022-05-28
  • 通讯作者: ** 王信群(1967—),男,安徽无为人,博士,教授,主要从事工业爆炸防控方面的研究。E-mail:xinqunwang@cjlu.edu.cn。
  • 作者简介:石永国 (1968—),男,浙江诸暨人,本科,正高级工程师,主要从事工业火灾爆炸防控技术工作。E-mail:hzsyg@126.com。
  • 基金资助:
    国家国际科技合作专项(2013DFG71760)。

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

SHI Yongguo1, TANG Qing2, HU Siyuan1, DING Chao2, WANG Xinqun2   

  1. 1 Zhejiang Academy of Safety Science and Technology, Hangzhou Zhejiang 310012, China;
    2 Institute of Safety Engineering, China Jiliang University, Hangzhou Zhejiang 310018, China
  • Received:2021-08-15 Revised:2021-10-11 Online:2021-11-28 Published:2022-05-28

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。

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

Abstract: 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.

Key words: flue gas, powder coating, inerting effects, explosion flame propagation, curing by crosslinking, powder/air mixtures

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