不同条件下生物素中间体粉尘爆炸特性

发布时间：2018-04-16 21:05

本文选题：生物素中间体 + 粒径分布　；参考：《消防科学与技术》2015年06期

【摘要】：以某化工厂两种不同合成工艺条件下的生物素关键中间体BT1和BT2粉尘为研究对象,采用扫描电镜及激光粒度仪对其表面形态及粒径分布进行表征,并利用热综合分析仪开展热解特性分析。在Hartmann爆炸实验装置中就其粉尘爆炸特性进行实验研究。结果表明,两种粉尘的最大爆炸压力pmax及最大压力上升速率(dp/dt)max随粉尘浓度的增加均呈现先上升后下降的趋势,且都在质量浓度为700g/m3附近达到最大值,但BT1的最大爆炸压力是BT2的2倍,而最大爆炸压力上升速率则为后者的6.3倍。尽管两种粉尘的爆炸下限浓度接近,但在该浓度区域内,BT1粉尘随浓度的增加,其最大爆炸压力增长速度明显快于BT2粉尘,爆炸敏感度更高。条件许可时应优先采用T2合成工艺进行生产。针对上述生产工艺流程,防止粉尘爆炸最为经济有效的技术措施是防止粉尘外逸、定期清扫积尘。
[Abstract]:The surface morphology and particle size distribution were characterized by scanning electron microscopy (SEM) and laser particle size analyzer (LPMs) with BT1 and BT2 dust, the key intermediates of biotin in two different synthetic processes in a chemical plant.The pyrolysis characteristics were analyzed by thermal comprehensive analyzer.The dust explosion characteristics of Hartmann explosive device were studied.The results showed that the maximum explosion pressure (pmax) and the maximum pressure rise rate (DP / DT) of the two kinds of dust increased first and then decreased with the increase of dust concentration, and both reached the maximum value near the mass concentration of 700g/m3.However, the maximum explosion pressure of BT1 is twice as high as that of BT2, and the maximum explosion pressure is 6.3 times higher than that of BT2.Although the lower explosive concentration of the two kinds of dust is close, the maximum explosion pressure increases more rapidly than that of BT2 dust, and the explosive sensitivity is higher than that of BT2 dust.T2 synthesis process should be preferred when conditions permit.In view of the above production process, the most economical and effective technical measure to prevent dust explosion is to prevent dust from escaping and to clean dust accumulation regularly.
【作者单位】：中国计量学院质量与安全工程学院;西安诚乐科工贸有限责任公司;
【基金】：国家国际科技合作专项项目(2013DFG71760) 国家自然科学基金项目(51174182)
【分类号】：X932

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