摘要
为研究糖粉粉尘爆炸特性,采用20 L球形爆炸装置进行试验测试,通过改变糖粉粒径来测定粉尘爆炸下限质量浓度（LEL）、爆炸压力以及爆炸指数特性参数,研究粒径对糖粉爆炸特性的影响。结果表明,随着粒径的减小,粉尘LEL先由70~80 g/m3降低到0~10 g/m3,再上升到20~30 g/m3;爆炸压力由0.75 MPa增大到1.07 MPa;爆炸指数由11.2 MPa·m/s增大到23.4 MPa·m/s。此外,粒径为45~53μm的3号粉尘的LEL为0~10 g/m3,其爆炸敏感度最高;而粒径小于等于45μm的4号粉尘的爆炸压力为1.07 MPa,爆炸指数为23.4 MPa·m/s,其爆炸烈度最大。随着粒径的减小,糖粉粉尘的爆炸烈度单调性增大。
To learn explosive characteristics of sugar dust,experimental tests were carried out with a20 L sphere explosion unit. Influences of sugar dust particle size on sugar dust explosion characteristic parameters（ LEL,explosion pressure and explosion index） were studied The results show that with decrease of particle size,the LEL firstly drops from 70-80 g / m3 to 0-10 g / m3,then increases to20-30 g / m3,the explosion pressure increases from 0. 75 MPa to 1. 07 MPa,and the explosion index increases from 11. 2 MPa· m / s to 23. 4 MPa· m / s. Besides,among four dust samples,dust No. 3 with a particle size of 45-53 μm has the lowest LEL of 0-10 g / m3 and dust No. 4 with a particle size under45 μm has the strongest explosion intensity. And with the decrease in particle size,the explosion intensity is monotonically increased.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2015年第9期85-90,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51474187
51174089)
