密闭空间煤粉爆炸特性的实验研究

发布时间：2018-06-01 11:29

本文选题：煤粉 + 粉尘爆炸　；参考：《爆破》2017年03期

【摘要】：为了探明煤粉在密闭空间中的爆炸特性参数,利用20 L球形爆炸装置进行实验测试,实验研究了不同点火能量对煤粉爆炸行为的影响,对比CaCO_3和Al(OH)_3两种惰性介质的抑爆效果及惰性介质的抑爆效力随点火能量的变化规律进行了重点探讨。结果表明:随着点火能量的增加,爆炸压力随着煤粉浓度的增加呈现先上升后下降的趋势,在同一浓度下,粉尘最大爆炸压力和最大升压速率呈线性上升,在高浓度下,粉尘爆炸压力受点火能量的影响更显著;添加CaCO_3和Al(OH)_3能够降低煤粉的爆炸压力,相对于CaCO_3的物理抑爆而言,Al(OH)_3的物理-化学抑爆效果更佳;惰性介质抑爆效力随点火能量增加而下降,建议采用5~10 k J点火能量考察惰性介质对煤粉爆炸的抑制效力。
[Abstract]:In order to find out the explosion characteristic parameters of pulverized coal in closed space, the effect of different ignition energy on the explosive behavior of pulverized coal was experimentally studied by using a 20L spherical explosive device. In this paper, the effects of CaCO_3 and Al(OH)_3 on explosion suppression and the effect of inert medium on ignition energy are discussed in detail. The results show that with the increase of ignition energy, the explosive pressure increases first and then decreases with the increase of pulverized coal concentration. At the same concentration, the maximum explosion pressure and the maximum rate of pressure rise linearly, and at the high concentration, the maximum explosion pressure and the maximum pressure rise rate of the dust increase linearly. CaCO_3 and Al(OH)_3 can reduce the explosion pressure of pulverized coal, and compared with the physical explosion suppression of CaCO_3, the physical-chemical explosion suppression effect of CaCO_3 is better. The explosion suppression efficiency of inert medium decreases with the increase of ignition energy. It is suggested that the inert medium should be used to study the inhibition effect of inert medium on pulverized coal explosion by using 5 ~ (10) KJ ignition energy.
【作者单位】：首都经济贸易大学安全与环境工程学院;
【分类号】：X932

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