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Influences of methane and propane on the explosion characteristics of polymethyl methacrylate and acrylonitrile butadiene styrene dusts
Process Safety Progress ( IF 1 ) Pub Date : 2021-10-16 , DOI: 10.1002/prs.12313
Jianwei Cheng 1, 2 , Chang Qi 2 , Jing Zhang 3 , Peitao Zhao 3 , Yi Qin 4 , Yue Wang 5 , Gang Zhao 2 , Ke Gao 6
Affiliation  

Polymethyl methacrylate (PMMA) and acrylonitrile butadiene styrene copolymers (ABS) are widely applied to industrial production, with the risk of explosion mixed with combustible gas increasing gradually. A 20 L spherical explosive device was used to study the variation pattern of the explosion characteristics of four gas–dust mixtures: methane/PMMA, methane/ABS, propane/PMMA, and propane/ABS mixtures. The results showed that despite adding methane and propane, PMMA and ABS dusts within the range of minimum explosion concentration are still likely to explode. The comparative analysis shows that propane is more chemically reactive than methane and PMMA and ABS dusts mixed with propane are more dangerous than those mixed with methane. Meanwhile, it was found that as the concentration of methane and propane increases, the maximum explosion pressure Pmax, maximum explosion pressure rise rate (dP/dt)max, and explosive index K of the dusts rise as well, but the increasing trend remains steady. The single-phase methane and propane have higher maximum explosion pressure and explosive index than the gas–dust mixture, with the lowest maximum explosion pressure and explosive index found in the single-phase PMMA and ABS dusts. With methane and propane mixed, the explosion hazard of PMMA and ABS dusts is intensified from St1 to St3. This study reveals the explosion characteristics of PMMA and ABS dusts, providing a basis for ensuring a safe working environment, preventing and controlling explosion accidents, and reducing the destructiveness of accidents.

中文翻译:

甲烷和丙烷对聚甲基丙烯酸甲酯和丙烯腈丁二烯苯乙烯粉尘爆炸特性的影响

聚甲基丙烯酸甲酯(PMMA)和丙烯腈丁二烯苯乙烯共聚物(ABS)广泛应用于工业生产,与可燃气体混合发生爆炸的风险逐渐增加。使用 20 L 球形爆炸装置研究了四种气体-粉尘混合物的爆炸特性变化模式:甲烷/PMMA、甲烷/ABS、丙烷/PMMA 和丙烷/ABS 混合物。结果表明,尽管添加了甲烷和丙烷,但在最小爆炸浓度范围内的PMMA和ABS粉尘仍有可能发生爆炸。比较分析表明,丙烷比甲烷更具化学反应性,与丙烷混合的 PMMA 和 ABS 粉尘比与甲烷混合的粉尘更危险。同时发现,随着甲烷和丙烷浓度的增加,最大爆炸压力粉尘的P max、最大爆炸压力上升率(d P /d t ) max和爆炸指数K也有所上升,但上升趋势保持稳定。单相甲烷和丙烷的最大爆炸压力和爆炸指数高于气尘混合物,其中单相 PMMA 和 ABS 粉尘的最大爆炸压力和爆炸指数最低。甲烷和丙烷混合后,PMMA 和 ABS 粉尘的爆炸危险从 St1 加剧到 St3。本研究揭示了PMMA和ABS粉尘的爆炸特性,为保障安全工作环境、预防和控制爆炸事故、降低事故破坏性提供依据。
更新日期:2021-10-16
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