Abstract We attempted to prevent the thermal risk of a runaway reaction of polymerization in a batch reactor and to realize online monitoring and emergency inhibition of the thermal runaway behavior. Styrene thermal initiation of bulk polymerization was studied. A full-size model of the styrene polymerization reactor was constructed by referring to the reactor model of the Mettler Toledo automatic calorimeter, which was combined with the kinetic and thermodynamic models of styrene polymerization. The DIV thermal runaway critical criterion based on chaos divergence theory was used to judge the thermal runaway reaction. The critical point of the runaway reaction was determined and used to inhibit the thermal runaway of styrene polymerization by injecting cooling diluents at the liquid surface. The influence of injection rate ( v c = 0.5 、 0.8 、 1 m / s ), injection position (in-1、in-2、in-3), and amount of cooling diluents (no add、50 %、70 %、100 %) injected on the thermal runaway inhibition of the reaction was investigated and elucidated. The results indicated that a better inhibiting effect can be obtained by injecting the inhibitors at higher rates near the edge of the paddle blade. Moreover, appropriately increasing the injection amount of the inhibitors can achieve better inhibition of the runaway reaction.

中文翻译：

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苯乙烯聚合的失控抑制：基于混沌发散理论的模拟研究

摘要 我们试图防止间歇反应器聚合反应失控的热风险，实现热失控行为的在线监测和紧急抑制。研究了本体聚合的苯乙烯热引发。参考Mettler Toledo自动量热仪的反应器模型，结合苯乙烯聚合的动力学和热力学模型，构建了苯乙烯聚合反应器的全尺寸模型。基于混沌发散理论的DIV热失控临界判据用于判断热失控反应。确定失控反应的临界点，并通过在液体表面注入冷却稀释剂来抑制苯乙烯聚合的热失控。注入速度的影响（vc=0.5、0. 8 、 1 m / s )、注入位置（in-1、in-2、in-3）和冷却稀释剂的注入量（不添加、50 %、70 %、100 %）对热失控抑制反应进行了研究和阐明。结果表明，在桨叶边缘附近以更高的速率注入抑制剂可以获得更好的抑制效果。此外，适当增加抑制剂的注入量可以更好地抑制失控反应。