摘要
通过构建铝粉尘层底板加热条件下着火燃烧的数值模型,探究铝粉尘层着火燃烧规律,同时结合碳酸钙惰性原理,开展碳酸钙粉体惰化条件下铝粉尘层最低着火温度实验。研究表明,铝粉尘着火燃烧具有加热温度高、燃烧温度大的特征,碳酸钙可以有效提高铝粉尘的点火温度,碳酸钙粉体粒度越小、浓度越大,对铝粉尘层的惰化效果越显著。
Through building a numerical model for the ignition and combustion of aluminum dust layer bottom board under the heating condition,the ignition combustion law of aluminum dust layer was explored.Meanwhile,combining with the principle of inertia of calcium carbonate,the experiment on the lowest ignition temperature of aluminum dust layer under the inerting condition of calcium carbonate powder was conducted.The results indicate that the ignition of aluminum dust is characterized by high heating temperature and large combustion temperature,and calcium carbonate can effectively improve the ignition temperature of aluminum dust.Meanwhile,the smaller the particle size is and the greater the concentration of calcium carbonate powder are,the more significant the inerting effect on the aluminum dust layer will be.
作者
谢鹏
吕鹏飞
XIE Peng;LV Peng-fei(Beijing Municipal Institute of Labour Protection,Beijing 100054,China;Institute of Safety Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Academy of Safety Engineering and Technology,Beijing 102617,China)
出处
《消防科学与技术》
CAS
北大核心
2020年第12期1634-1637,共4页
Fire Science and Technology
基金
北京市科技新星计划项目(Z181100006218092)
北京市优秀人才培养资助青年拔尖个人项目(2016000026833ZK05)。
关键词
粉尘爆炸
最低点燃温度
粉尘层
惰化
数值模拟
dust explosion
minimum ignition temperature
dust layer
inerting
numerical simulation
