不同磁性金属丝对氢气爆炸的影响机理研究

胡守涛; 洪子金; 杨喜港; 聂百胜; 李如霞; 王乐; 高建村

doi:10.11858/gywlxb.20220611

不同磁性金属丝对氢气爆炸的影响机理研究

doi: 10.11858/gywlxb.20220611

胡守涛^{1, 2,},
洪子金¹,
杨喜港¹,
聂百胜³,
李如霞¹,
王乐⁴,
高建村^{1, 2,*, ,}

1.
北京石油化工学院安全工程学院, 北京　102617
2.
北京市安全生产工程技术研究院, 北京　102617
3.
重庆大学资源与安全学院, 重庆　400044
4.
南京理工大学化学与化工学院, 江苏南京　210094

基金项目: 北京市教委科技计划项目（KM201910017001）；大学生创新训练项目（2021J00162）

详细信息

作者简介:
胡守涛（1986—），男，博士，讲师，主要从事气体爆炸预防与控制技术研究.E-mail：hushoutao@bipt.edu.cn

通讯作者:
高建村（1964—），男，博士，教授，主要从事应用化学和安全工程研究.E-mail：gaojiancun@bipt.edu.cn

中图分类号: O389; X932
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出版历程
- 收稿日期: 2022-06-15
- 修回日期: 2022-07-14
- 网络出版日期: 2023-02-06
- 刊出日期: 2023-02-05

Influence Mechanism of Different Magnetic Wires on Hydrogen Explosion

HU Shoutao^{1, 2
,},
HONG Zijin¹,
YANG Xigang¹,
NIE Baisheng³,
LI Ruxia¹,
WANG Le⁴,
GAO Jiancun^{1, 2,*
, ,}

1.
School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2.
Beijing Academy of Safety Engineering and Technology, Beijing 102617, China
3.
School of Resources and Safety, Chongqing University, Chongqing 400044, China
4.
School of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 为探索氢气爆炸防治新技术，开发新型阻隔防爆材料，开展了抗磁性铝丝和铁磁性镍丝对预混氢气-空气爆炸压力影响实验，利用CHEMKIN-PRO软件对氢气爆炸过程中的反应路径和温度敏感性变化进行模拟。实验结果表明，两种金属丝对氢气-空气混合气体爆炸具有双重作用：当混合气体中氢气的体积分数低于20%时，金属丝材料抑制氢气爆炸，且材料填充量越大，抑制作用越强；当混合气体中氢气的体积分数高于25%时，两种金属丝促进氢气爆炸，且填充量越大，促进作用越强。在促进爆炸阶段，镍丝的促进效果弱于铝丝；在抑制爆炸阶段，镍丝的抑爆效果优于铝丝。模拟结果表明，R2对氢气的生成速率影响最大，R1对氢气及爆炸过程中的温度影响最大，影响温度敏感性变化的主要基元反应对爆炸均具有促进作用。通过实验和数值模拟综合分析，揭示了不同磁性金属丝对氢气爆炸的影响机理，可为氢气爆炸防治和开发新型阻隔防爆材料提供理论指导。
- 氢气爆炸 /
- 磁性 /
- 温度敏感性 /
- 填充量 /
- 自由基 /
- 防爆材料
Abstract: For exploring the new technologies of hydrogen explosion prevention and the development of new barrier and explosion-proof materials, the effects of anti-magnetic aluminum wire and ferromagnetic nickel wire on premixed hydrogen-air explosion pressure were carried out. The CHEMKIN-PRO software was used to simulate the reaction path and temperature sensitivity changes during hydrogen explosion. The experimental results show that the two metal wires have a dual effect on the explosion of hydrogen-air mixture. When the volume fraction of hydrogen in the mixture is less than 20%, the metal wire material inhibits hydrogen explosion, and the larger the filling amount of the material, the stronger the inhibition. When the volume fraction of hydrogen in the mixed gas is higher than 25%, the two metal wires promote hydrogen explosion, and the larger the filling amount, the stronger the promotion. In the stage of promoting explosion, the effect of nickel wire is weaker than that of aluminum wire, in the explosion suppression stage, the explosion suppression effect of nickel wire is better than that of aluminum wire. The inhibition or promotion effect of metal materials on gas explosion is determined by the concentration and properties of gas and the filling amount of materials. Changing the filling amount of materials will lead to changes in the performance of inhibiting/promoting hydrogen explosion. The simulation results show that •H, •O, and •OH are the key free radicals in the process of hydrogen explosion, and the change of reaction rate and sensitivity directly determine the explosion intensity. Among the main elementary reactions that affect hydrogen explosion, R2 has the greatest impact on the formation rate of hydrogen, and R1 has the greatest impact on hydrogen and temperature during explosion. The main elementary reactions that affect the change of temperature sensitivity have a promoting effect on explosion. The influence mechanism of different magnetic wires on hydrogen explosion was revealed by experiment and numerical simulation.
- hydrogen explosion /
- magnetism /
- temperature sensitivity /
- filling amount /
- free radicals /
- explosion-proof materials

HTML全文

图 1 气体爆炸实验装置

Figure 1. Gas explosion experimental device

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图 2 实验管道

Figure 2. Experimental pipeline

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图 3 空白组最大爆炸压力曲线

Figure 3. Maximum explosion pressure curve of blank group

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图 4 铝丝组在不同填充表面积下的最大爆炸压力曲线

Figure 4. Maximum explosion pressure curves of aluminum wire group under different filling surface area

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图 5 镍丝组在不同填充表面积下的最大爆炸压力曲线

Figure 5. Maximum explosion pressure curve of nickel wire group under different filling surface area

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图 6 空白组和材料组的最大爆炸压力对比

Figure 6. Comparison of maximum explosion pressure between blank group and material group

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图 7 氢气爆炸的反应路径

Figure 7. Reaction path of hydrogen explosion

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图 8 氢气爆炸的温度敏感性变化曲线

Figure 8. Temperature sensitivity curve of hydrogen explosion

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表 1 实验参数与工况

Table 1. Experimental parameters and working conditions

Exp. No.	$\varphi $/%	Filling material	Filling surface area/cm²
1	15	Empty	0
2	15	Aluminium	2054, 2465, 2876
3	15	Nickel	2054, 2465, 2876
4	20	Empty	0
5	20	Aluminium	2054, 2465, 2876
6	20	Nickel	2054, 2465, 2876
7	25	Empty	0
8	25	Aluminium	2054, 2465, 2876
9	25	Nickel	2054, 2465, 2876

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表 2 不同工况下空白组压力数据

Table 2. Pressure data of blank group under different working conditions

$\varphi $/%	p_max/kPa	Δt/ms
15	222	125
20	335	60
25	419	29

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表 3 不同工况下铝丝组的压力数据

Table 3. Pressure data of aluminum wire group under different working conditions

Filling surface area/cm²	$\varphi $/%	p_max/kPa	Δt/ms
2054	15	82	19.20
	20	136	18.86
	25	1214	0.81
2465	15	60	22.98
	20	114	10.38
	25	2045	0.91
2876	15	45	19.08
	20	110	8.91
	25	2596	0.27

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表 4 不同工况下镍丝组的压力数据

Table 4. Pressure data of nickel wire group under different working conditions

Filling surface area/cm²	$\varphi $/%	p_max/kPa	Δt/ms
2054	15	67	18.39
	20	158	9.21
	25	1145	0.57
2465	15	53	22.70
	20	111	12.02
	25	1828	0.59
2876	15	31	14.26
	20	83	10.11
	25	2438	0.46

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表 5 氢气爆炸过程中的关键基元反应

Table 5. Key elementary reactions during hydrogen explosion

Reaction order	Elementary reaction
R1	H+O₂=O+OH
R2	O+H₂=H+OH
R3	OH+H₂=H+H₂O
R9	H+OH=H₂O
R10	O+H=OH

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