N<sub>2</sub>与CO<sub>2</sub>对合成气爆炸特性影响的实验研究

余明高; 韦贝贝; 郑凯

doi:10.11883/bzycj-2018-0131

N₂与CO₂对合成气爆炸特性影响的实验研究

doi: 10.11883/bzycj-2018-0131

余明高^{1, 2,},
韦贝贝¹,
郑凯^1, ,

1.
重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400044
2.
河南理工大学安全科学与工程学院，河南焦作 454003

基金项目: 国家自然科学基金（U1361205，51574111，50974055）；煤矿灾害动力学与控制国家重点实验室自主研究课题（2011DA 105287-ZD201401）

详细信息

作者简介:
余明高（1963－　），男，教授，13333910808@126.com

通讯作者:
郑　凯（1989－　），男，讲师，zkcqu@cqu.edu.cn

中图分类号: O381; X932
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- 文章访问数: 5663
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-19
- 修回日期: 2018-06-26
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-06-01

Effect of inert gas addition on syngas explosion

YU Minggao^{1, 2
,},
WEI Beibei¹,
ZHENG Kai^{1
, ,}

1.
State Key Laboratory of Coal Mine Disaster Dynamics Control, Chongqing University, Chongqing 400044, China
2.
School of Safety Science Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China

摘要

摘要: 为了研究惰性气体（氮气及二氧化碳）对合成气爆炸特性的影响，利用20 L球形爆炸仪器，开展不同体积分数氮气与二氧化碳作用下不同当量比合成气的爆炸实验，从爆炸峰值压力、爆炸压力到达峰值时间、爆炸指数方面分析惰性气体对合成气爆炸特性的影响。研究结果表明：惰性气体体积分数的增加会降低合成气的爆炸压力和爆炸指数，推迟爆炸压力到达峰值的时间；在相同体积分数下，CO₂比N₂能更有效地降低合成气的爆炸峰值压力和爆炸指数，减小爆炸反应的剧烈程度，CO₂在抑制合成气爆炸方面比N₂的效果明显。
- 合成气 /
- 爆炸压力 /
- 当量比 /
- 惰性气体
Abstract: In this study we investigated the effect of inert gas addition on the characteristics of the syngas explosion using 20 L spherical explosive device. Effects of different volume fraction of inert gas (CO₂/N₂) on the explosion parameters including the peak pressure, the delay of the peak pressure time, and the explosion index were obtained from the experiment. The results show that the delay of the peak pressure time of the syngas explosion rose higher, and the explosion peak pressure and the explosion index fell lower with the increase of the volume fraction of the inert gas; that CO₂ had a stronger inhibition effect on syngas explosion than N₂ because the peak pressure and the explosion index fell down more sharply with the addition of CO₂ than of N₂.
- syngas /
- explosion pressure /
- equivalence ratio /
- inert gas

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图 1 20 L球形爆炸测试系统

Figure 1. Test system with a 20-L spherical explosion vessel

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图 2 添加惰性气体后合成气爆炸压力的变化

Figure 2. Pressure evolution during syngas explosion with inert gas

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图 3 添加惰性气体后爆炸峰值压力的变化

Figure 3. Maximum pressure during syngas explosionwith inert gas

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图 4 添加惰性气体后压力到达峰值的时间

Figure 4. Time to peak pressure during syngas explosion with inert gas

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图 5 添加惰性气体后爆炸指数的变化

Figure 5. Deflagration index during syngas explosionwith inert gas

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表 1 不同实验工况下气体体积分数

Table 1. Volume fraction of gases under different experimental conditions

${{\textit{φ}}_{\rm{inert}}}$ /%	${\textit{φ}}_{{{\rm H}_{2}}}\!,{{\textit{φ}}_{\rm{CO}}}$ /%	${\textit{φ}}_{\rm{air}}$ /%	${\textit{φ}}_{{{\rm H}_{2}}}\!,{{\textit{φ}}_{\rm{CO}}}$ /%	${\textit{φ}}_{\rm{air}}$ /%	${\textit{φ}}_{{{\rm H}_2}}\!,{{\textit{φ}}_{\rm{CO}}}$ /%	${\textit{φ}}_{\rm{air}}$ /%	${\textit{φ}}_{{{\rm H}_2}} \!,{{\textit{φ}}_{\rm{CO}}}$ /%	${\textit{φ}}_{\rm{air}}$ /%
${{\textit{φ}}_{\rm{inert}}}$ /%	Φ=0.5		Φ=1.0		Φ=1.5		Φ=2.0
0	8.68	82.64	14.79	70.42	19.33	61.34	22.83	54.34
5.00	8.25	78.50	14.05	66.90	18.36	58.28	21.69	51.62
10.00	7.81	74.38	13.31	63.38	17.39	55.22	20.55	48.90
15.00	7.38	70.24	12.57	59.86	16.43	52.14	19.41	46.19
20.00	6.94	66.12	11.83	56.34	15.46	49.08	18.26	43.48
25.00	6.51	61.98	11.09	52.82	14.49	46.02	17.12	40.76

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表 2 添加惰性气体后峰值压力下降值

Table 2. Decrease of peak pressure during syngas explosion with inert gas

Φ	惰性气体	Δp_max/MPa
Φ	惰性气体	5%	10%	15%	20%	25%
0.5	N₂	0.009 37	0.021 56	0.042 67	0.053 65	0.100 34
0.5	CO₂	0.025 12	0.051 37	0.077 72	0.114 30	0.153 89
1.0	N₂	0.002 57	0.011 98	0.028 53	0.047 04	0.062 88
1.0	CO₂	0.019 07	0.044 82	0.073 77	0.104 40	0.123 47
1.5	N₂	0.012 55	0.020 56	0.043 34	0.073 25	0.084 23
1.5	CO₂	0.020 11	0.056 38	0.096 89	0.123 86	0.161 27
2.0	N₂	0.020 05	0.037 43	0.057 97	0.076 6	0.091 45
2.0	CO₂	0.043 07	0.070 91	0.112 81	0.137 91	0.143 39

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表 3 添加惰性气体后压力到达峰值时间的延迟

Table 3. Delay of peak pressure time during syngas explosion with inert gas

Φ	惰性气体	ΔT/s
Φ	惰性气体	5%	10%	15%	20%	25%
0.5	N₂	0.002 4	0.007 2	0.010 0	0.015 2	0.027 7
0.5	CO₂	0.004 2	0.009 4	0.011 4	0.024 8	0.037 6
1.0	N₂	0.004 8	0.007 8	0.012 8	0.018 0	0.022 0
1.0	CO₂	0.009 4	0.012 2	0.015 6	0.022 2	0.026 8
1.5	N₂	0.002 6	0.004 0	0.007 4	0.014 0	0.017 0
1.5	CO₂	0.006 4	0.009 4	0.013 2	0.016 4	0.019 5
2.0	N₂	0.001 8	0.004 8	0.008 6	0.014 6	0.017 5
2.0	CO₂	0.007 8	0.011 2	0.013 8	0.015 7	0.021 2

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表 4 添加N₂后爆炸指数相比于添加CO₂后爆炸指数的差值

Table 4. Difference between explosion indexeswith N₂ and CO₂

Φ	ΔK
Φ	5%	10%	15%	20%	25%
0.5	4.546 12	5.364 57	6.455 34	8.001 46	3.636 89
1.0	5.092 24	7.546 12	10.912 15	13.641 28	10.909 22
1.5	22.727 66	24.549 04	26.185 94	27.276 72	23.641 28
2.0	4.546 12	8.183 02	19.095 16	30.004 39	21.822 83

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