主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2026, Vol. 45 ›› Issue (5): 9-13.

• • 上一篇    下一篇

KHCO3抑制聚丙烯/丙烯两相爆炸机理研究

谌庭苇1, 刘勇1,2,3   

  1. （1.湖南科技大学 资源环境与安全工程学院，湖南 湘潭 411201； 2.地下空间防火防爆材料与装备湖南省工程研究中心，湖南 湘潭 411201； 3.火灾爆炸防控与应急技术湖南省普通高等学校重点实验室，湖南 湘潭 411201）
  • 收稿日期:2025-10-13 修回日期:2025-12-16 出版日期:2026-05-15 发布日期:2026-05-15
  • 作者简介:谌庭苇，湖南科技大学在读硕士研究生，主要从事抑制粉尘爆炸方面的研究，湖南省湘潭市雨湖区北二环路，411201。

Research on the mechanism of KHCO3 in suppressing two-phase explosion of polypropylene/propylene

Chen Tingwei1, Liu Yong1,2,3   

  1. (1. School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411201, China; 2. Hunan Engineering Research Center for Fire and Explosion Prevention Materials and Equipment, Xiangtan Hunan 411201, China; 3. Hunan Provincial Key Laboratory of Fire and Explosion Control and Emergency Technology, Xiangtan Hunan 411201, China)
  • Received:2025-10-13 Revised:2025-12-16 Online:2026-05-15 Published:2026-05-15

摘要： 为探究KHCO3抑制剂对聚丙烯/丙烯两相爆炸抑制机理，通过火焰传播特性、热解特性以及化学反应动力学机理分析，从物理作用和化学作用2个方面对抑制机理进行分析，揭示了阻断爆炸反应的进程。结果表明，KHCO3对不同浓度配比的聚丙烯/丙烯两相爆炸均具有抑制作用。KHCO3受热分解吸收大量的热量，分解产生的碳酸盐会附着在PP粉尘表面，使得PP粉尘熔点从160 ℃升高至222 ℃。同时，KOH+H ⇌ K+H2O反应消耗·H的最大速率值最高，为-0.007 45 mol/（cm3·s）。反应KOH+OH ⇌ KO+H2O消耗·OH的最大速率值最高，为-0.011 34 mol/（cm3·s）。高温下KHCO₃在火焰前缘生成气态 K 与 KOH，通过K ⇌ KOH 循环持续捕获·H 与·OH，转化为 H₂O，实现爆炸抑制。

关键词: 聚丙烯, 丙烯, 混合爆炸, KHCO3, 抑制机理

Abstract: To investigate the inhibition mechanism of KHCO₃ inhibitor on polypropylene/propylene two-phase explosion, the inhibition mechanism was analyzed from both physical and chemical aspects by examining flame propagation characteristics, pyrolysis characteristics and chemical reaction kinetic mechanism, revealing the interruption of the explosion reaction process. The results show that KHCO₃ exhibits an inhibitory effect on polypropylene/propylene two-phase explosions with different concentration ratios. KHCO₃ decomposes under heating and absorbs a large amount of heat, and the carbonate produced by decomposition adheres to the surface of PP dust, raising the melting point of PP dust from 160 ℃ to 222 ℃. Meanwhile, the maximum consumption rate of ·H by the reaction KOH + H ⇌┬ K + H₂O reaches the highest value of -0.007 45 mol/(cm³·s). The maximum consumption rate of ·OH by the reaction KOH + OH ⇌┬ KO + H₂O reaches the highest value of -0.011 34 mol/(cm³·s). At high temperatures, KHCO₃ generates gaseous K and KOH at the flame front, which continuously scavenge ·H and ·OH through the K ⇌┬ KOH cycle and convert them into H₂O, thereby achieving explosion suppression.

Key words: polypropylene, propylene, mixed explosion, KHCO?, inhibition mechanism