摘要
为了研究煤粉云燃爆危险性参数的影响因素,采用Godbert-Greenwald恒温炉测试不同粒径、质量浓度和喷粉压力3种影响因素下煤粉云的最低着火温度。结果表明:最低着火温度随粒径增大而升高;最低着火温度在煤粉质量浓度为0.250~0.667 kg/m^(3)的范围内随质量分数的增加而降低,最小值为545℃;最低着火温度随喷粉压力的增大呈“V”字形变化;3种影响因素对最低着火温度的影响强弱程度为质量分数>喷粉压力>煤粉粒径。
In order to study the factors affecting the ignition risk parameters of pulverized coal cloud,Godbert-Greenwald constant temperature furnace was used to test the minimum ignition temperature of pulverized coal cloud under different particle size,mass concentration and powder injection pressure conditions.The results show that the minimum ignition temperature increases with the increase of particle size.In the range of 0.250-0.667 kg/m^(3),the mass concentration of pulverized coal decreases with the increase of mass fraction,and the minimum value is 545℃.With the increase of dusting pressure,it changes in the shape of“V”.The degree of influence of the three factors on the minimum ignition temperature is as follows:mass fraction>powder injection pressure>coal particle size.
作者
严月园
姚刚
马砺
范晶
桑威
马腾
王光明
YAN Yueyuan;YAO Gang;MA Li;FAN Jing;SANG Wei;MA Teng;WANG Guangming(School of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;Shandong Yanzhou coal Heze Energy Chemical Co.,Ltd.,Heze 274000,China;Yili New Mine Coal Industry Co.,Ltd,Yining 835200,China)
出处
《煤矿安全》
CAS
北大核心
2024年第7期78-84,共7页
Safety in Coal Mines
基金
国家自然科学基金重点资助项目(52174206)。
关键词
煤粉云
燃爆危险性
最小点火能
最低着火温度
喷粉压力
pulverized coal cloud
explosion hazard
minimum ignition energy
minimum ignition temperature
spray powder pressure
