CF<sub>3</sub>I和CO<sub>2</sub>抑制甲烷-空气爆炸实验研究

程方明; 南凡; 肖旸; 罗振敏; 牛巧霞

doi:10.11883/bzycj-2021-0386

CF₃I和CO₂抑制甲烷-空气爆炸实验研究

doi: 10.11883/bzycj-2021-0386

程方明^{1, 2,},
南凡^{1, 2, ,},
肖旸^{1, 3},
罗振敏^{1, 2},
牛巧霞^{1, 2}

1.
西安科技大学安全科学与工程学院，陕西西安 710054
2.
西安科技大学西安市城市公共安全与消防救援重点实验室，陕西西安 710054
3.
西安科技大学陕西省煤火灾害防治重点实验室，陕西西安 710054

基金项目: 国家自然科学基金（52174200）；国家重点研发计划（2021YFB4000905）

详细信息

作者简介:
程方明（1982－　），男，博士，副教授，chengfm@xust.edu.cn

通讯作者:
南　凡（1993－　），男，博士研究生，1538478605@qq.com

中图分类号: O381; X932
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- 文章访问数: 527
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-15
- 修回日期: 2022-04-26
- 网络出版日期: 2022-05-07
- 刊出日期: 2022-06-24

Experimental study on the suppression of methane-air explosion by CF₃I and CO₂

CHENG Fangming^{1, 2
,},
NAN Fan^{1, 2
, ,},
XIAO Yang^{1, 3},
LUO Zhenmin^{1, 2},
NIU Qiaoxia^{1, 2}

1.
School of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China
2.
Xi’an Key Laboratory of Urban Public Safety and Fire Rescue, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China
3.
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China

摘要

摘要: 为了探究三氟碘甲烷CF₃I和二氧化碳CO₂复合使用对甲烷爆炸的抑制效果，采用容积为20 L的球形爆炸实验装置，研究了单独和复合使用三氟碘甲烷和二氧化碳对甲烷爆炸压力特性的影响。研究结果表明：添加三氟碘甲烷和二氧化碳后，甲烷爆炸极限范围逐渐缩小，且三氟碘甲烷对甲烷爆炸极限的影响更显著，当三氟碘甲烷和二氧化碳的体积分数分别达到5.5%和32.0%时，甲烷爆炸上下限重合，临界氧的体积分数分别为17.85%和12.50%。可见三氟碘甲烷对甲烷爆炸极限的影响机制与二氧化碳不同，并不是通过降氧为主而发挥抑制作用的。三氟碘甲烷对甲烷爆炸的抑制效果明显优于二氧化碳，对比体积分数为9.5%的甲烷爆炸最大爆炸压力和最大爆炸压力上升速率下降的比率，5.0%三氟碘甲烷的抑爆效果约是等量二氧化碳的6倍和5倍。二氧化碳掺混少量三氟碘甲烷后，抑爆效果大幅提升，掺混比例越，高效果越明显，且对抑制甲烷爆炸压力作用的提升更显著。三氟碘甲烷掺混体积分数大于等于1.0%时，二氧化碳单位增量导致甲烷最大爆炸压力下降的幅度有所增加。这说明三氟碘甲烷的加入具有改善抑爆效果和增强抑爆效率的双重作用。
- 甲烷爆炸 /
- 三氟碘甲烷 /
- 二氧化碳 /
- 爆炸压力 /
- 抑爆
Abstract: To explore the inhibitory effect of the combined use of trifluoroiodomethane and carbon dioxide on methane explosion, a 20-L spherical explosion experimental system was used to carry out explosion experiments under different methane volume fractions when the two were used alone and in combination. The variation law of methane explosion pressure characteristics under different working conditions was studied. The results show that after adding trifluoroiodomethane and carbon dioxide, the explosion limit of methane is gradually reduced, and the effect of trifluoroiodomethane on the explosion limit of methane is more obvious. When the volume fractions of trifluoroiodomethane and carbon dioxide reached 5.5% and 32.0%, respectively, the upper and lower explosion limits of methane coincided, and at this moment the corresponding critical oxygen volume fractions were 17.85% and 12.50%, respectively. The affection mechanism of trifluoroiodomethane on the explosion limit of methane is different from that of carbon dioxide, and it does not exert an inhibitory effect mainly by reducing oxygen. The inhibition effect of trifluoroiodomethane on methane explosion is significantly better than that of carbon dioxide. Compared with the decrease ratio of the maximum explosion pressure and the maximum explosion pressure rise rate of 9.5% methane, the suppression explosion effects of 5% trifluoroiodomethane are about 6 times and 5 times as strong as those of the same amount of carbon dioxide. After carbon dioxide is mixed with a small amount of trifluoroiodomethane, the suppression explosion effect is greatly improved. Furthermore, the higher ratio of adding trifluoroiodomethane, the more obvious the effect. When the volume fraction of trifluoroiodomethane is greater than or equal to 1.0%, the magnitude of the drop in the maximum explosion pressure of methane has increased due to the increment of carbon dioxide units. It is indicated that the addition of trifluoroiodomethane has the dual effect of improving the explosion suppression effect and enhancing the explosion suppression efficiency when carbon dioxide is used to suppress methane explosion.
- methane explosion /
- trifluoromethyl iodide /
- carbon dioxide /
- explosion pressure /
- explosion suppression

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图 1 实验装置

Figure 1. The experimental device

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图 2 CF₃I和CO₂对CH₄爆炸极限的影响

Figure 2. Effect of CF₃I and CO₂ on the explosion limit of CH₄

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图 3 CF₃I和CO₂的比定容热容

Figure 3. Specific heat capacity at constant volume of CF₃I and CO₂

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图 4 CF₃I和CO₂对CH₄爆炸压力曲线的影响

Figure 4. Effect of CF₃I and CH₄ on methane explosion pressure curve

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图 5 CF₃I和CO₂对CH₄爆炸压力参数的影响

Figure 5. Effects of CF₃I and CO₂ on the pressure parameters of CH₄ explosion

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图 6 复合抑爆剂对9.5%的CH₄爆炸压力参数的影响

Figure 6. Effect of compound explosion suppressor on explosion pressure parameters of 9.5% CH₄

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表 1 实验工况

Table 1. Experimental conditions

编号	工况	编号	工况	编号	工况
1	9.5%CH₄	11	9.5%CH₄+15.0%CO₂	22	9.5%CH₄+1.0%CF₃I+14.0%CO₂
2	9.5%CH₄+0.5%CF₃I	12	9.5%CH₄+20.0%CO₂	23	9.5%CH₄+1.0%CF₃I+19.0%CO₂
3	9.5%CH₄+1.0%CF₃I	13	9.5%CH₄+25.0%CO₂	24	9.5%CH₄+1.0%CF₃I+24.0%CO₂
4	9.5%CH₄+1.5%CF₃I	14	9.5%CH₄+0.5%CF₃I+4.5%CO₂	25	9.5%CH₄+1.5%CF₃I+3.5%CO₂
5	9.5%CH₄+2.0%CF₃I	15	9.5%CH₄+0.5%CF₃I+9.5%CO₂	26	9.5%CH₄+1.5%CF₃I+8.5%CO₂
6	9.5%CH₄+3.0%CF₃I	16	9.5%CH₄+0.5%CF₃I+14.5%CO₂	27	9.5%CH₄+1.5%CF₃I+13.5%CO₂
7	9.5%CH₄+4.0%CF₃I	17	9.5%CH₄+0.5%CF₃I+19.5%CO₂	28	9.5%CH₄+1.5%CF₃I+18.5%CO₂
8	9.5%CH₄+5.0%CF₃I	18	9.5%CH₄+0.5%CF₃I+24.5%CO₂	29	9.5%CH₄+1.5%CF₃I+23.5%CO₂
9	9.5%CH₄+5.0%CO₂	19	9.5%CH₄+1.0%CF₃I+4.0%CO₂
10	9.5%CH₄+10.0%CO₂	21	9.5%CH₄+1.0%CF₃I+9.0%CO₂

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