化工进展 ›› 2019, Vol. 38 ›› Issue (06): 2574-2580.DOI: 10.16085/j.issn.1000-6613.2018-1788

• 化工过程与装备 • 上一篇    下一篇

N2和CO2对液化石油气(LPG)惰化抑爆效能对比分析

罗振敏1,2,3(),解超1,2,3,王九柱1,2,3,苏彬1,2,3   

  1. 1. 西安科技大学安全科学与工程学院,陕西 西安 710054
    2. 陕西省工业过程安全与应急救援工程技术研究中心,陕西 西安 710054
    3. 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054
  • 收稿日期:2018-09-06 出版日期:2019-06-05 发布日期:2019-06-05
  • 作者简介:罗振敏(1976—),女,教授,博士生导师,研究方向为气体与粉尘爆炸防控。E-mail:<email>386493182@qq.com</email>。
  • 基金资助:
    国家重点研发计划(2017YFC0804702-5);国家自然科学基金(51674193);陕西省自然科学基础研究计划面上项目(2017JM5068)

Comparative analysis of the inert effects of N2 and CO2 on LPG explosion

Zhenmin LUO1,2,3(),Chao XIE1,2,3,Jiuzhu WANG1,2,3,Bin SU1,2,3   

  1. 1. College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,Shaanxi,China
    2. Shaanxi Provincial Industrial Process Safety and Emergency Rescue Engineering Technology Research Center,Xi’an 710054,Shaanxi,China
    3. Key Western China Laboratory for Coal Exploitation Development and Safety for Ministry of Education,Xi’an 710054,Shaanxi,China
  • Received:2018-09-06 Online:2019-06-05 Published:2019-06-05

摘要:

为探究惰性气体对液化石油气(LPG)惰化抑爆效能的影响规律,本文运用可燃气体爆炸极限测定装置和可视化球型爆炸综合实验系统,分别测试了不同体积分数N2和CO2时,LPG的爆炸极限和压力特性参数并进行对比分析。结果表明:N2和CO2都会缩小液化石油气的爆炸极限,且对爆炸上限的影响程度更大;达到爆炸临界点时,CO2体积分数为34%,小于N2的43%,并且给出了爆炸危险区域的计算公式;在相同条件下,CO2使得液化石油气的最大爆炸压力、最大爆炸压力上升速率降幅大于N2的作用效果,且更好地降低了爆炸危险度和最大爆炸指数,提前了爆炸最猛烈程度的出现时间,减小爆炸危险时间。综合对比后发现,CO2对LPG的抑爆性能要优于N2

关键词: 安全, 液化石油气, 公式化, 爆炸极限, 压力特性, 爆炸危险度, 爆炸指数, 惰化抑爆

Abstract:

In order to investigate the effect of inert gas on the suppression efficiency of liquefied petroleum gas (LPG), the explosion limit and pressure parameters of LPG with different volume fraction of N2 and CO2 were tested through the explosive limit measurement device of combustible gas and the visual spherical explosion comprehensive experimental system. The results obtained through the comparison and analysis showed that both N2 and CO2 will reduce the explosion limit of LPG and have a greater influence on the upper limit of explosion; when the critical point of explosion suppression was reached, the volume fraction of CO2 (34%) was less than that of N2 (43%), and the formula for calculating the dangerous explosion area was given. Under the same conditions, CO2 has greater suppression effects on the explosion pressure and the rate of increase of the maximum explosion pressure of LPG than N2, reduces the explosion risk and the maximum explosion index more effectively, and makes the occurrence time of the most violent degree of explosion advance and the explosion danger time reduce. After comprehensive comparison, it was found that the explosion suppression performance of CO2 to LPG was better than that of N2.

Key words: safety, liquefied petroleum gas, formulation, explosion limit, pressure characteristics, explosion risk, explosion index, inertia suppression

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