Explosion Suppression Performance of Spherical Non-Metallic Materials for Methane Hydrogen-Doped Syngas Explosion
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摘要: 目前甲烷掺氢技术广泛应用于管道运输，为了保障甲烷掺氢气体的运输安全，基于自主搭建的气体爆炸平台，采用实验与理论相结合的方法，研究了掺氢比对甲烷-空气爆炸压力的影响，并探究了单一球形和组合球形多孔非金属材料对甲烷掺氢的抑爆效果，为球形多孔非金属材料在混合燃料阻隔防爆领域的应用提供理论支撑与实验依据。实验结果表明：甲烷掺氢后爆炸强度显著增强，最大爆炸压力以及压力上升速率均随氢气体积分数的增大而增大；与单一球形多孔非金属材料相比，组合球形多孔非金属材料对甲烷掺氢的抑爆效果更突出，并且抑爆效果受填充长度影响，当填充长度为40 cm时，最大爆炸压力降低51.02%，最大爆炸压力上升速率降低53.85%，相较于单一球形多孔非金属材料，抑爆性能提升了78.58%。Abstract: Basis on a self-built gas explosion platform, the influence of hydrogen on methane-air explosion pressure is studied when the hydrogen doping ratio is 0%, 5%, and 10%, and the explosion suppression performance of single spherical and combined spherical porous non-metallic materials for methane-hydrogen-doped syngas is explored. The experimental results show that the explosion intensity can be effectively increased after the methane-air is mixed with hydrogen, and the maximum explosion pressure and pressure rise rate increase with the increase of hydrogen volume fraction, when the hydrogen doping ratio is 10%, the maximum explosion pressure (
pmax) is 245 kPa and the maximum explosion pressure rising rate (dp/dt)max is 3250 kPa/s. Spherical porous non-metallic materials can reduce the maximum explosion pressure and rising rate of syngas, and with the increase of filling length, the inhibition effect becomes more and more obvious. Compared with a single spherical porous non-metallic material, the combined spherical porous non-metallic material has a more remarkable effect on the explosion suppression of methane-hydrogen-doped syngas, and the explosion suppression effect is affected by the filling length. When the filling length is 40 cm, the maximum explosion pressure decreases by 51.02%, and the maximum explosion pressure rising rate decreases by 53.85%, and therefore its explosion suppression performance is increased by 78.58% compared with the single spherical porous non-metallic materials. -
图 3 掺氢比对预混气体爆炸压力的影响
Figure 3. Effect of hydrogen doping ratio on explosion pressure of premixed gas
图 4 不同掺氢比条件下甲烷掺氢爆炸火焰传播图像
Figure 4. Flame propagation images of methane hydrogen-doped syngas under different hydrogen doping ratios
图 5 不同掺氢比条件下最大爆炸压力和最大爆炸压力上升速率曲线
Figure 5. Maximum explosion pressure and maximum pressure rise rate for different hydrogen doping ratios
图 6 不同填充长度条件下单一球形材料对预混气体爆炸压力的影响
Figure 6. Effect of single spherical material with different filling lengths on explosion pressure of premixed gas
图 7 不同填充长度条件下最大爆炸压力和最大爆炸压力上升速率曲线
Figure 7. Maximum explosion pressure and maximum pressure rise rate for different filling lengths
图 8 不同填充长度的组合球形材料对预混气体爆炸压力的影响
Figure 8. Effect of combined spherical material with different filling lengths on explosion pressure of premixed gas
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