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| 无机盐复配SDS表面活性剂的超细水雾降尘抑爆研究 |
| Dust Reduction and Explosion Suppression Effect of Ultrafine Water Mist with SDS Surfactant Compounded with Inorganic Salt |
| 投稿时间：2024-03-06 修订日期：2024-04-15 |
| DOI： |
| 中文关键词: SDS表面活性剂 无机盐 超细水雾 爆炸行为 煤尘沉降 |
| 英文关键词: SDS surfactant Inorganic salt Ultrafine water mist Explosion behaviour Coal dust deposition |
| 基金项目:辽宁省科技重大专项2019JH1/10300002 |
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| 中文摘要: |
| 通过可视化抑爆实验及润湿性实验，研究了三种无机盐复配SDS阴离子表面活性剂产生的超细水雾对甲烷煤尘爆炸的降尘抑爆效果。探讨了无机盐复配SDS的超细水雾对爆炸压力和火焰结构的影响过程，分析了NaCl、MgCl2、KI三种无机盐与SDS的复配溶液下表面张力、煤尘接触角和沉降时间的变化规律。结果表明，无机盐阳离子通过削弱表面电势和改变胶束结构降低SDS表面活性剂的表面张力，且Mg2+化合价更高，降低效果更明显。SDS超细水雾通过提高煤尘润湿性优化了超细水雾的抑爆效果，无机盐-SDS二元复配超细水雾通过自由基碰撞化学抑制、煤尘团聚沉降的协同增效作用延长了感应期时间，降低了爆炸强度。尤其是在MgCl2的作用下，火焰锋面出现褶皱和变形，并呈现内部分布不均的橘黄色。研究对煤矿井下实现同步降尘抑爆提出了方向和选择。 |
| 英文摘要: |
| Through the explosion suppression experiment and wettability experiment, the ultrafine water mist produced by three kinds of inorganic salts compounded with SDS anionic surfactant was investigated for the dust reduction and explosion suppression effect on methane coal dust explosion. The influence of the ultrafine water mist of inorganic salt compounded with SDS on the explosion pressure and flame structure was explored, and the changing rules of surface tension, coal dust contact angle and sinking time of the three inorganic salts compounded with SDS, namely, NaCl, MgCl2 and KI, were analysed. The results show that the inorganic salt cation reduces the surface tension of SDS surfactant by weakening the surface potential and changing the micellar structure, and the Mg2+ valence is higher, which reduces the effect more obviously. SDS ultrafine water mist by improving the wettability of coal dust to optimise the explosion suppression effect of ultrafine water mist. Inorganic salt-SDS binary compound ultrafine water mist prolongs the induction period time and reduces the explosion intensity through the synergistic effect of free radical collision chemical inhibition and coal dust agglomeration. Especially under the effect of MgCl2, the flame front appeared wrinkled and deformed, showing an orange colour with uneven internal distribution. The study proposes directions and options for the realisation of simultaneous dust reduction and explosion suppression in underground coal mines. |
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