N2和CO2惰化丙烯爆炸极限参数实验研究

doi:10.11949/0438-1157.20191167

化工学报 ›› 2020, Vol. 71 ›› Issue (4): 1922-1928.DOI: 10.11949/0438-1157.20191167

N₂和CO₂惰化丙烯爆炸极限参数实验研究

罗振敏^1,^2,³(),杨勇^1,²,程方明^1,^2,³,王涛⁴(),常助川^1,²,苏彬^1,²,张蔓^1,²

^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.陕西省煤火灾害防治重点实验室，陕西西安 710054
^4.西安科技大学矿业工程博士后流动站，陕西西安 710054

收稿日期:2019-10-10 修回日期:2019-11-21 出版日期:2020-04-05 发布日期:2020-04-05
通讯作者: 罗振敏,王涛
作者简介:罗振敏（1976—），女，博士，教授，zmluo@xust.edu.cn
基金资助:
国家重点研发计划项目(2017YFC0804702);国家自然科学基金项目(51674193);陕西省自然科学基础研究计划联合基金项目(2019JLM-9);中国博士后科学基金面上项目(2019M663780)

Experimental study on explosion limits parameters of propylene with dilution of nitrogen and carbon dioxide

Zhenmin LUO^1,^2,³(),Yong YANG^1,²,Fangming CHENG^1,^2,³,Tao WANG⁴(),Zhuchuan CHANG^1,²,Bin SU^1,²,Man ZHANG^1,²

^1.School of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China
^2.Shaanxi Engineering Research Center for Industrial Process Safety and Emergency Rescue, Xi’an 710054, Shaanxi, China
^3.Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an 710054, Shaanxi, China
^4.Postdoctoral Program, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China

Received:2019-10-10 Revised:2019-11-21 Online:2020-04-05 Published:2020-04-05
Contact: Zhenmin LUO,Tao WANG

摘要/Abstract

摘要：

为得到惰化条件下丙烯的爆炸极限参数的变化规律，采用标准的可燃性气体爆炸极限测试装置(GB/T 12474—2008)，测试研究了N₂和CO₂对丙烯的爆炸极限、临界氧浓度和最小氧浓度的影响，并绘制了C₃H₆-N₂/CO₂-Air爆炸三角形图，对比分析了N₂和CO₂对丙烯爆炸极限参数的惰化效果。结果表明，添加N₂和CO₂都会缩小丙烯爆炸极限范围，减小爆炸的危险度。N₂惰化条件下，丙烯爆炸上下限重合时N₂添加量为49%，临界氧浓度为9.79%；在CO₂惰化条件下，丙烯爆炸上下限重合时，CO₂的添加量为34%，临界氧浓度为12.94%。在丙烯浓度不变的情况下，发现CO₂惰化氛围下的最小氧浓度值均高于N₂惰化条件下的。两种惰化工况下的丙烯爆炸三角形结果显示，在CO₂惰化的爆炸区域明显小于N₂惰化下的；当添加惰性气体使丙烯处于完全惰化状态时，CO₂的窒息比和添加量均小于N₂。本文的实验数据及结论可为进一步研究丙烯爆炸和工业丙烯安全防爆工作提供理论基础。

关键词: 化学过程, 氮气, 二氧化碳, 丙烯, 爆炸, 极限参数, 安全

Abstract:

To investigate explosion limits parameters of propylene with inert gas dilution, the explosion limits, critical oxygen concentration and minimum oxygen concentration of propylene, with the dilution effect of N₂ and CO₂, were determined by using a standard equipment on basis of GB/T 12474—2008. Furthermore, the explosion triangle diagram of C₃H₆-N₂/CO₂-Air was proposed, and in this way the inertial effect of N₂ and CO₂ on propylene explosion was obtained and analyzed. The results show that the addition of N₂ and CO₂ will reduce the explosion limit of propylene and reduce the risk of explosion. More specifically, the addition of N₂ in 49% would merge the upper and lower explosion limits of propylene which the critical oxygen concentration was 9.79%. While for that of CO₂, the corresponding added volume fraction and the critical oxygen concentration are 34% and 12.94%, respectively. For each propylene at a specific volume fraction, the value minimum oxygen concentration inerted by CO₂ was higher than that of inerted by N₂. Moreover, the explosion triangle diagram shows that the explosive area diluted by CO₂ is much smaller than that diluted by N₂. It takes more less CO₂ in volume to completely inert propylene explosion, compared with N₂.The obtained data can provide fundamental parameters for the prevention of propylene explosion in related industries.

Key words: chemical processes, nitrogen, carbon dioxide, propylene, explosions, limiting parameters, safety

中图分类号:

TD 712.7

罗振敏, 杨勇, 程方明, 王涛, 常助川, 苏彬, 张蔓. N₂和CO₂惰化丙烯爆炸极限参数实验研究[J]. 化工学报, 2020, 71(4): 1922-1928.

Zhenmin LUO, Yong YANG, Fangming CHENG, Tao WANG, Zhuchuan CHANG, Bin SU, Man ZHANG. Experimental study on explosion limits parameters of propylene with dilution of nitrogen and carbon dioxide[J]. CIESC Journal, 2020, 71(4): 1922-1928.

图/表 7

图1 实验装置示意图

Fig.1 Schematic diagram of experimental device

图2 丙烯的爆炸极限及爆炸危险度的变化曲线

Fig.2 Explosion limits and explosion risk value of propylene with dilution of CO2 and N2

图3 惰性气体对丙烯爆炸极限对应氧浓度的影响

Fig. 3 Critical oxygen concentration of propylene with dilution of CO2 and N2

图4 最小氧浓度与惰性气体临界添加量

Fig.4 Minimum oxygen concentration and critical addition of dilution of CO2 and N2

图5 N2、CO2惰化下丙烯爆炸三角形图比较

Fig.5 Comparison explosion triangles diagram of propylene with dilution of CO2 and N2

图6 不同惰性气体与活化分子碰撞

Fig.6 Collision of different inert gases with activated molecules

图7 不同惰性气体的吸热能力

Fig.7 Heat absorption capacity of different inert gases

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N₂和CO₂惰化丙烯爆炸极限参数实验研究

Experimental study on explosion limits parameters of propylene with dilution of nitrogen and carbon dioxide

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