煤尘爆炸残留物特征影响因素研究
发布时间：2018-08-13 15:32
【摘要】：为了研究煤尘浓度、煤尘粒径以及点火能量对煤尘爆炸后气、固态残留物组分特征的影响,利用20L球形爆炸装置测试系统进行了煤尘爆炸实验,并对爆炸残留物进行了收集与分析。研究结果表明:随着煤尘浓度的增加,气态残留物中CO、H_2、CH_4、C_2H_4、C_2H_6及C_3H_8的体积分数逐渐增大,而CO_2先增大后减小,固态残留物挥发分与固定碳含量逐渐增加,灰分含量逐渐减少;煤尘浓度为100g/m~3时,粒径48~75μm的煤尘爆炸残留气体中CO、CO_2、H_2、CH_4等气体的体积分数达到最大值,煤尘浓度为400g/m~3时,CO、CO_2、H_2、CH_4等气体的体积分数随着煤尘粒径的减小而增大,固态残留物挥发分含量随煤尘粒径减小而逐渐减小,灰分含量逐渐增大;随着点火能量增大,气态残留物中CO、H_2、CH_4、C_2H_6、C_3H_8逐渐升高,固态残留物挥发分与固定碳含量逐渐减小,而灰分含量不断增大。
[Abstract]:In order to study the effects of coal dust concentration, particle size and ignition energy on the composition characteristics of gas and solid residues after coal dust explosion, the coal dust explosion experiment was carried out by using a 20L spherical explosive device test system. The explosive residue was collected and analyzed. The results show that with the increase of coal dust concentration, the volume fraction of C2H _ 2C _ 2H _ 6 and C_3H_8 in gas residue increases gradually, while CO_2 increases first and then decreases, the volatile and fixed carbon contents of solid residue increase gradually, and the ash content decreases gradually. When the coal dust concentration is 100 g / m ~ 3, the volume fraction of the gas in the residual gas of coal dust explosion is 4875 渭 m. The volume fraction of the gas, such as COCO2S, H2CH4 and so on, reaches the maximum value, and the volume fraction of the gas such as COCO2CO2Stack-CH4 increases with the decrease of the particle size of the coal dust, and the concentration of coal dust is 400g / m3, and the volume fraction of the gas such as COCOCO2H2SnCH4 increases with the decrease of the particle size. With the decrease of coal particle size, the volatile matter content of solid residue gradually decreases, and the ash content increases gradually. With the increase of ignition energy, COH2H2CH4 and C2H6 C3H8 increase gradually, and the volatile matter of solid residue and the fixed carbon content decrease gradually. The ash content is increasing.
【作者单位】： 煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学安全工程学院;宿迁南钢金鑫轧钢有限公司;
【基金】：国家自然科学基金资助项目(51174200)
【分类号】：TD714.5
[Abstract]:In order to study the effects of coal dust concentration, particle size and ignition energy on the composition characteristics of gas and solid residues after coal dust explosion, the coal dust explosion experiment was carried out by using a 20L spherical explosive device test system. The explosive residue was collected and analyzed. The results show that with the increase of coal dust concentration, the volume fraction of C2H _ 2C _ 2H _ 6 and C_3H_8 in gas residue increases gradually, while CO_2 increases first and then decreases, the volatile and fixed carbon contents of solid residue increase gradually, and the ash content decreases gradually. When the coal dust concentration is 100 g / m ~ 3, the volume fraction of the gas in the residual gas of coal dust explosion is 4875 渭 m. The volume fraction of the gas, such as COCO2S, H2CH4 and so on, reaches the maximum value, and the volume fraction of the gas such as COCO2CO2Stack-CH4 increases with the decrease of the particle size of the coal dust, and the concentration of coal dust is 400g / m3, and the volume fraction of the gas such as COCOCO2H2SnCH4 increases with the decrease of the particle size. With the decrease of coal particle size, the volatile matter content of solid residue gradually decreases, and the ash content increases gradually. With the increase of ignition energy, COH2H2CH4 and C2H6 C3H8 increase gradually, and the volatile matter of solid residue and the fixed carbon content decrease gradually. The ash content is increasing.
【作者单位】： 煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学安全工程学院;宿迁南钢金鑫轧钢有限公司;
【基金】：国家自然科学基金资助项目(51174200)
【分类号】：TD714.5
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