Jinzhang Jia, Xiuyuan Tian, Fengxiao Wang
College of Safety Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China.
Key Laboratory of Mine Thermal Power Disaster and Prevention of Ministry of Education, Liaoning Technical University, Huludao, Liaoning 125105, China.
ACS Omega. 2022 Sep 2;7(36):31974-31982. doi: 10.1021/acsomega.2c02945. eCollection 2022 Sep 13.
To achieve the best explosion suppression effect of an active powder spraying system, the KHCO powder suppression test for a 9.5% methane-air premixed methane explosion was studied based on an independent test platform consisting of a pipe network. The suppression effect of KHCO powder particle size and powder spraying pressure on the methane explosion shock wave pressure, flame wave velocity, and flame wave temperature were studied, and the explosion suppression mechanism was analyzed. The results indicated that both the particle size of the KHCO powder and powder spraying pressure had a significant effect on the explosion inhibition. When the spraying pressure was in the range of 0.1-0.2 MPa, the increase in KHCO powder spraying pressure on the effect of explosion suppression was significantly enhanced, and when the powder spraying pressure exceeded 0.2 MPa, the explosion suppression effect did not obviously increase. With a reduction in the KHCO powder particle size, the effect of explosion suppression significantly improved, and when the KHCO powder particle size was reduced to 50-75 μm, we observed the best shock wave pressure, flame wave velocity, and flame wave temperature suppression effect.
为实现活性粉末喷射系统最佳的抑爆效果，基于由管网组成的独立试验平台，开展了KHCO粉末对9.5%甲烷 - 空气预混甲烷爆炸的抑爆试验研究。研究了KHCO粉末粒径和粉末喷射压力对甲烷爆炸冲击波压力、火焰波速度和火焰波温度的抑制效果，并分析了抑爆机理。结果表明，KHCO粉末粒径和粉末喷射压力对抑爆均有显著影响。当喷射压力在0.1 - 0.2 MPa范围内时，KHCO粉末喷射压力的增加对抑爆效果的增强作用显著，而当粉末喷射压力超过0.2 MPa时，抑爆效果没有明显增加。随着KHCO粉末粒径的减小，抑爆效果显著提高，当KHCO粉末粒径减小至50 - 75μm时，冲击波压力、火焰波速度和火焰波温度的抑制效果最佳。
