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引用次数: 0
摘要
聚合反应的热失控会导致严重事故。为了研究热失控的紧急抑制过程,利用计算流体动力学(CFD)结合热力学模型建立了苯乙烯热聚合反应模型。采用 DIV 临界准则确定失控反应的临界点。全面研究了抑制剂(乙苯)的注入直径、注入速率和注入角度对苯乙烯聚合反应的抑制作用。采用拉格朗日粒子跟踪方法对抑制剂的注入混合轨迹进行了可视化分析。采用响应面法优化了注入参数,以抑制热失控。结果表明,在本文建立的模型中,喷射口直径为 2 毫米、喷射速度为 5 米/秒、喷射角度为 90°的喷射参数组合可以提高抑制热失控的效果。这项工作为防止聚合反应热失控提供了理论依据。
CFD simulation study of thermal runaway inhibition for styrene polymerization by jet mixing
Thermal runaway of polymerization reactions causes serious accidents. To study the emergency inhibition process of thermal runaway, a styrene thermal polymerization reaction model is established by using computational fluid dynamics (CFD) combined with a thermodynamic model. The DIV critical criterion is used to determine the critical point of the runaway reaction. The inhibitory effect of injection diameter, injection rate, and injection angle of inhibitor (ethylbenzene) on the styrene polymerization reaction is studied comprehensively. The injection mixing trajectory of the inhibitor is visualized by using the Lagrangian particle tracking method. The injection parameters are optimized to suppress thermal runaway by the response surface method. The result shows that a combination of injection parameters with 2 mm injection port diameter, 5 m/s injection rate, and 90° injection angle can improve the suppression effect of thermal runaway for the established model in this paper. This work provides a theoretical basis for preventing thermal runaway for polymerization reactions.
期刊介绍:
Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration.
Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).