可燃性粉尘云着火危险性实验  

Experimental Study on Ignition Risk of Combustible Dust Cloud

作　　者：黄楚原 袁必和 赵齐 员亚龙 刘静[1] 陈先锋[1] HUANG Chuyuan;YUAN Bihe;ZHAO Qi;YUN Yalong;LIU Jing;CHEN Xianfeng(School of Safety Science and Emergency Management,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学安全科学与应急管理学院

出　　处：《常州大学学报（自然科学版）》2020年第1期8-13,共6页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51774221,51703175);中央高校基本科研业务费资助项目(2019-YB-039,2019-zy-299)

摘　　要：为了深入研究淀粉粉尘着火危险性的内在机理和规律,采用粉尘云最低着火温度测试系统对不同质量浓度、粒径下的玉米淀粉粉尘云最低着火温度进行实验研究,得到了不同工况下的粉尘云最低着火温度、着火延迟时间等参数和最低着火温度下的炉壁温度曲线,并以此综合评价玉米淀粉粉尘云的着火危险性。结果表明:随着测试温度降低,着火延迟现象愈发明显。粉尘云质量浓度逐渐增大时,其最低着火温度先下降后上升、存在最小值,不同质量浓度下粉尘云的着火延迟时间与其最低着火温度成正比。淀粉颗粒粒径的减小降低了粉尘云最低着火温度,且二者之间存在相关性较强的函数关系。In order to investigate the internal mechanism and regularity of ignition hazard of starch dust,the minimum ignition temperature of corn starch dust cloud under different concentration and particle size was tested by using the minimum ignition temperature test system of dust cloud.The minimum ignition temperature,ignition delay time and the furnace wall temperature curve under different conditions were obtained,and the ignition risk of corn starch dust cloud was evaluated comprehensively.The results showed that with the decreasing of the test temperature,the ignition delay phenomenon became more obvious.When the concentration of dust cloud increased gradually,the minimum ignition temperature first decreased and then increased,and there is a minimum value.The ignition delay time of the dust cloud was proportional to the minimum ignition temperature with different concentrations.The minimum ignition temperature of dust cloud reduced with the decrease of starch particle size,and there is a strong functional relationship between them.

关 键 词：最低着火温度 粉尘云质量浓度 着火延迟时间 粉尘粒径 

分 类 号：X932[环境科学与工程—安全科学]