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 ›› 2023, Vol. 42 ›› Issue (10): 1356-1361.

• • 上一篇    下一篇

管壁导管对管道内甲烷火焰泄放作用的研究

黄勇1, 邓文辉1, 章赟2, 罗梓标1   

  1. （1. 常州大学 安全科学与工程学院，江苏 常州 213164；2. 南京工业大学 安全科学与工程学院，江苏 南京 211816）
  • 出版日期:2023-10-15 发布日期:2023-10-15
  • 作者简介:黄 勇(1978- )，男，江苏南京人，常州大学安全科学与工程学院高级工程师，主要从事燃烧与爆炸防治与应用、化工安全等方面的研究，江苏省常州市武进区滆湖路1号，213164。
  • 基金资助:
    基金项目：2021年江苏省重点研发计划（社会发展）项目（BE2021641）；2022年江苏省产学研合作项目（BY2022782）；原安监总局安全生产重特大事故防治关键技术科技项目（jiangsu-0014-2017AQ）

Study on effect of pipe wall conduit on methane explosion flame discharge in pipeline

Huang Yong1, Deng Wenhui1, Zhang Yun2, Luo Zibiao1   

  1. (1. College of Safety Science and Engineering, Changzhou University, Jiangsu Changzhou 213164, China;2. College of Safety Science and Engineering, Nanjing Tech University, Jiangsu Nanjing 211816, China)
  • Online:2023-10-15 Published:2023-10-15

摘要： 为提高狭长空间可燃混合气体泄爆效率及防护水平，开展设置管壁导管的方形管道内甲烷泄爆试验，通过改变管壁导管长径比以及位置，探究管壁导管管径、位置因素对管道内气体火焰传播过程、爆炸超压的影响。结果表明：管壁导管对火焰的泄放作用在时间上存在些许滞后；与无管壁导管工况相比，导管管径分别为60、80、100 mm时，火焰传播时间分别延长15.4%、35.8%、61.0%，最大爆炸超压峰值分别下降24.5%、30.5%、40.4%；同一管径管壁导管置于方管前端可有效泄放部分火焰及压力，降低爆炸能量横向传播动力，泄爆效果明显优于管壁导管置于管道中部及后端。导管分别置于前端、中部、后端时，火焰传播时间分别延长85.4%、15.4%、4.5%，最大爆炸超压峰值分别下降40.6%、24.5%、18.6%。因此，设置管壁导管能有效降低火焰传播速度以及泄放爆炸超压。

关键词: 管壁导管；泄爆；火焰传播速度；爆炸超压, 甲烷火焰

Abstract: In order to improve the explosion release efficiency and protection level of combustible mixed gas in a narrow and long space, the methane explosion discharge test in square pipes with pipe wall conduits was carried out, and the influence of pipe wall conduit diameter and position factors on the gas flame propagation process and explosion overpressure in the pipeline was explored by changing the length diameter ratio and position of the pipe wall conduit. The results show that there is a slight lag in the time of the release effect of the pipe wall conduit on the flame. Compared with the working condition of conduit without pipe wall, when the pipe diameter of catheter is 60, 80 and 100 mm, the flame propagation time is extended by 15.4%, 35.8% and 61.0%, and the peak peak explosion overpressure is reduced by 24.5%, 30.5% and 40.4%, respectively. The same pipe diameter pipe wall conduit placed at the front end of the square pipe can effectively discharge part of the flame and pressure, reduce the lateral propagation power of explosion energy, and the explosion discharge effect is obviously better than that of the pipe wall conduit placed in the middle and back end of the pipeline. When the conduit was placed at the front end, middle and rear end, the flame propagation time was extended by 85.4%, 15.4% and 4.5%, and the peak peak explosion overpressure decreased by 40.6%, 24.5% and 18.6%, respectively. Therefore, the installation of pipe wall conduit can effectively reduce the speed of flame propagation and vent explosion overpressure.

Key words: tube wall catheter, explosion venting, flame propagation speed, explosive overpressure, methane flame