点火能量对煤粉爆炸行为的影响
|
摘要
为了探明点火能量对煤粉爆炸特性参数的影响,利用20 L球形爆炸装置进行试验测试,试验研究了不同点火能量对煤粉爆炸行为的影响,对煤粉爆炸猛度(最大爆炸压力和最大升压速率)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;惰性介质抑爆效力随点火能量增加而下降,建议采用5~10 kJ点火能量考察惰性介质对煤粉爆炸的抑制效力。
In order to investigate the influence of ignition energy on explosion characteristic parameters of pulverized coal, the experiment was carried out in the 20 L spherical explosive device to study the influence of different ignition energy on the explosion behavior of pulverized coal. The change law was emphatically discussed about the pulverized coal explosion brisance(the maximum explosion pressure and the maximum pressure rise rate) and the explosion suppression effect of inert medium with ignition energy. The results showed that the explosion pressure firstly increased and then decreased as the pulverized coal concentration increasing with the increase of ignition energy. Under the same concentration, the maximum explosion pressure and the maximum pressure rise rate increased linearly, and the influence of ignition energy on dust explosion pressure was more obvious at high concentration. Moreover, the explosion suppression effectiveness of inert medium decreased with the increase of ignition energy. It was suggested that 5 to 10 kJ ignition energy was the most appropriate to investigate the inhibition effect of inert medium on pulverized coal explosion.
In order to investigate the influence of ignition energy on explosion characteristic parameters of pulverized coal, the experiment was carried out in the 20 L spherical explosive device to study the influence of different ignition energy on the explosion behavior of pulverized coal. The change law was emphatically discussed about the pulverized coal explosion brisance(the maximum explosion pressure and the maximum pressure rise rate) and the explosion suppression effect of inert medium with ignition energy. The results showed that the explosion pressure firstly increased and then decreased as the pulverized coal concentration increasing with the increase of ignition energy. Under the same concentration, the maximum explosion pressure and the maximum pressure rise rate increased linearly, and the influence of ignition energy on dust explosion pressure was more obvious at high concentration. Moreover, the explosion suppression effectiveness of inert medium decreased with the increase of ignition energy. It was suggested that 5 to 10 kJ ignition energy was the most appropriate to investigate the inhibition effect of inert medium on pulverized coal explosion.
引文
[1]Abbasi T,Abbasi S A.Dust explosions-Cases,causes,consequences,and control[J].Journal of Hazardous Materials,2007,140(1/2):7-44.
[2]Proust C,Accorsi A,Dupont L.Measuring the violence of dust explosion with the“20 liter sphere”and with the standard“ISO 1 m3vessel”:systematic comparison and analysis of the discrepancies[J].Journal of Loss Prevention in the Process Industries,2007,20(4):599-606.
[3]张二强,张礼敬,陶刚,等.粉尘爆炸特征和预防措施探讨[J].中国安全生产科学技术,2012,8(2):88-92.
[4]谭汝媚,李仕雄,刘东.高湿度下点火延迟时间对粉尘爆炸参数的影响[J].中北大学学报(自然版),2013,34(6):653-657.
[5]曹卫国,潘峰,徐森,等.小麦淀粉粉尘爆炸特性参数的研究[J].安全与环境学报,2012,12(2):213-216.
[6]Chatrathi K,Going J.Dust deflagration extinction[J].Process Safety Progress,2000,19(3):146-153.
[7]甘媛,蒯念生,刘龙,等.碳酸钙对粉尘爆炸抑制效力的实验研究[J].消防科学与技术,2014,33(2):128.
[8]潘峰,马超,曹卫国,等.玉米淀粉粉尘爆炸危险性研究[J].中国安全科学学报,2011,21(7):46-51.
[9]GB/T 16425—1996粉尘云爆炸下限浓度测定方法[S].
[10]伍毅,贺元骅,黄卫星.液固两相惰性介质对煤粉爆炸惰化的实验研究[J].消防科学与技术,2014,33(6):601-604.
[11]CEN/TC305.EN 14034-3 Determination of explosion characteristics of dust clouds Part3:Determination of the lower explosion limit LEL of dust clouds[S].
[12]赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社,1996:179-185.
[13]蒯念生,黄卫星,袁旌杰,等.点火能量对粉尘爆炸行为的影响[J].爆炸与冲击,2012,32(4):432-438.
[14]伍毅,袁旌杰,蒯念生,等.碳酸盐对密闭空间粉尘爆炸压力影响的实验研究[J].中国安全科学学报,2010,20(10):92-96.
[15]张增志,谷娜,张际飞.瓦斯抑爆材料研究进展及瓦斯吸收剂初步研究[J].煤矿安全,2008,39(8):31.
[2]Proust C,Accorsi A,Dupont L.Measuring the violence of dust explosion with the“20 liter sphere”and with the standard“ISO 1 m3vessel”:systematic comparison and analysis of the discrepancies[J].Journal of Loss Prevention in the Process Industries,2007,20(4):599-606.
[3]张二强,张礼敬,陶刚,等.粉尘爆炸特征和预防措施探讨[J].中国安全生产科学技术,2012,8(2):88-92.
[4]谭汝媚,李仕雄,刘东.高湿度下点火延迟时间对粉尘爆炸参数的影响[J].中北大学学报(自然版),2013,34(6):653-657.
[5]曹卫国,潘峰,徐森,等.小麦淀粉粉尘爆炸特性参数的研究[J].安全与环境学报,2012,12(2):213-216.
[6]Chatrathi K,Going J.Dust deflagration extinction[J].Process Safety Progress,2000,19(3):146-153.
[7]甘媛,蒯念生,刘龙,等.碳酸钙对粉尘爆炸抑制效力的实验研究[J].消防科学与技术,2014,33(2):128.
[8]潘峰,马超,曹卫国,等.玉米淀粉粉尘爆炸危险性研究[J].中国安全科学学报,2011,21(7):46-51.
[9]GB/T 16425—1996粉尘云爆炸下限浓度测定方法[S].
[10]伍毅,贺元骅,黄卫星.液固两相惰性介质对煤粉爆炸惰化的实验研究[J].消防科学与技术,2014,33(6):601-604.
[11]CEN/TC305.EN 14034-3 Determination of explosion characteristics of dust clouds Part3:Determination of the lower explosion limit LEL of dust clouds[S].
[12]赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社,1996:179-185.
[13]蒯念生,黄卫星,袁旌杰,等.点火能量对粉尘爆炸行为的影响[J].爆炸与冲击,2012,32(4):432-438.
[14]伍毅,袁旌杰,蒯念生,等.碳酸盐对密闭空间粉尘爆炸压力影响的实验研究[J].中国安全科学学报,2010,20(10):92-96.
[15]张增志,谷娜,张际飞.瓦斯抑爆材料研究进展及瓦斯吸收剂初步研究[J].煤矿安全,2008,39(8):31.