摘要
为探究碳酸氢盐对豆粕粉尘爆炸的抑爆特性,选取NaHCO_(3),KHCO_(3),NH_(4)HCO_(3) 3种碳酸氢盐作为抑爆粉体,用最大爆炸压力P_(ex)、最大爆炸压力上升速率(d P/dt)_(ex)和爆炸指数K_(st)等参数分析了碳酸氢盐对豆粕粉尘爆炸的抑制效果.结果表明,质量浓度为400 g/m^(3)的豆粕粉尘爆炸特性参数最高,最大爆炸压力为0.763 MPa,最大爆炸压力上升速率为24.8 MPa/s,爆炸指数为6.7 MPa·m/s.随着碳酸氢盐粉末质量分数的增加,爆炸特性参数呈现下降趋势,且抑制效果不断增强.同一条件下,抑爆性能NH_(4)HCO_(3)>KHCO_(3)>NaHCO_(3).结合抑爆粉体热重分析及红外光谱分析,探究了3种抑爆粉体的抑爆机理及不同离子导致的差异性原因.
To investigate the explosion suppression characteristics of bicarbonate on soybean meal dust explosion,NaHCO_(3),KHCO_(3),and NH_(4)HCO_(3) bicarbonate were selected as explosion suppression powders.The inhibitory effect of bicarbonate on soybean meal dust explosion was analyzed from parameters such as maximum explosion pressure P_(ex),maximum explosion pressure rise rate(dP/dt)_(ex),and explosion index K_(st).The results showed that the explosion characteristic parameters of soybean meal dust with a mass concentration of 400 g/m^(3)were the highest,with a maximum explosion pressure of 0.763 MPa,a maximum explosion pressure rise rate of 24.8 MPa/s,and an explosion index of 6.7 MPa·m/s.As the mass fraction of bicarbonate powder increased,the explosion characteristic parameters showed a decreasing trend,and the inhibitory effect continued to increase.Under the same conditions,the explosion suppression performance of NH_(4)HCO_(3)>KHCO_(3)>NaHCO_(3).Combined with thermogravimetric analysis and infrared spectroscopy analysis of explosion suppression powders,the explosion suppression mechanisms of three types of powders and the differences caused by different ions were explored.
作者
许加玲
许开立
刘博
XU Jia-ling;XU Kai-li;LIU Bo(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报(自然科学版)》
CSCD
北大核心
2024年第12期1798-1804,共7页
Journal of Northeastern University(Natural Science)
关键词
粉尘爆炸
爆炸参数
碳酸氢盐
抑制机理
热重分析
dust explosion
explosion parameters
bicarbonate
inhibition mechanism
thermogravimetric analysis
