间歇式反应器热失控情景研究:以酯化反应为例

doi:10.16265/j.cnki.issn1003-3033.2017.08.022

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (8): 126-131.doi: 10.16265/j.cnki.issn1003-3033.2017.08.022

间歇式反应器热失控情景研究:以酯化反应为例

吴昊^1,2, 蒋军成^**1,2 教授, 倪磊^1,2

1 南京工业大学安全科学与工程学院,江苏南京 210009;
2 江苏省危险化学品本质安全与控制技术重点实验室,江苏南京 210009

收稿日期:2017-02-25 修回日期:2017-05-08 出版日期:2017-08-20 发布日期:2020-10-13
通讯作者: **蒋军成( 1967—),男,江苏淮安人,教授,博士生导师,主要从事危险化学品安全、化工过程安全等方面的教学与科研工作。E-mail: jcjiang_njtech@163.com。
作者简介:吴昊(1992—),男,新疆乌鲁木齐人,硕士研究生,研究方向为反应热失控与反应器安全。E-mail: 244212565@qq.com。
基金资助:
国家自然科学基金资助(21436006)。

Analysis of batch reactor thermal runaway scenario based on synthesis reaction of isopropyl propionate

WU Hao^1,2, JIANG Juncheng^1,2, NI Lei^1,2

1 College of Safety Science and Engineering, Nanjing Tech University, Nanjing Jiangsu 210009, China;
2 Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing Jiangsu 210009, China

Received:2017-02-25 Revised:2017-05-08 Online:2017-08-20 Published:2020-10-13

摘要/Abstract

摘要： 为预防间歇式反应器热失控风险,以恒温间歇式丙酸异丙酯合成反应为原型,利用反应量热仪(RC1e)获得不同冷却温度下反应放热特性及热动力学参数,并对计算流体力学(CFD)软件Fluent模拟结果进行试验验证。基于经验证的CFD耦合模型,对反应过程中搅拌和冷却失控情景进行模拟分析,分别从搅拌转速、冷却温度以及冷却流速失控3方面,研究失控情景对反应温升的影响。结果表明:反应温升对不同失控情景存在参数敏感性,其中冷却流速对反应温升影响较大,较低的入口冷却流速直接促使局部换热死区的形成,使失控时间相对标准工况提前近1/5,温度提高近22℃;以反应失控判据Chaos准则为警报标准,确定反应器最佳温度探测器应安装在反应液系内部远离冷却入口且靠近液面1/3处及以上的位置。

关键词: 间歇式反应器, 失控情景分析, 反应热失控, 丙酸异丙酯, 计算流体力学(CFD)

Abstract: For the sake of preventing stirred batch reactor thermal runaway experiments were carried on the synthesis reaction of isopropyl propionate. Reaction calorimeters(RC1e) were used to analyze the thermal behavior and kinetics of the reaction under different initial temperature conditions. The CFD simulation results got by Fluent software were validated by experiment. The simulation results were basically in agreement with the experimental results. Based on the obtained kinetic parameters, influences of temperature control system runaway, cooling system runaway and stirring system runway on reaction temperature risk were analyzed. The results show that the experimental temperature rising has a highly parameter sensitivity with working condition, the cooling velocity has a great influence on the reaction temperature, that the lower inlet cooling velocity directly causes local heat transfer dead zones to form, which makes thermal runaway time shorten by nearly 20%, compared with normal condition, and the temperature increase by nearly 22℃, and that the position where the reasonable temperature probe is set up should be at the top of the reactor , about 1/3 of the radical distance for the reactor according to the Chaos theory.

Key words: batch reactor, failure scenario analysis, thermal runaway reaction, isopropyl propionate, computational fluid dynamics(CFD)

中图分类号:

X937

吴昊, 蒋军成, 倪磊. 间歇式反应器热失控情景研究:以酯化反应为例[J]. 中国安全科学学报, 2017, 27(8): 126-131.

WU Hao, JIANG Juncheng, NI Lei. Analysis of batch reactor thermal runaway scenario based on synthesis reaction of isopropyl propionate[J]. China Safety Science Journal, 2017, 27(8): 126-131.

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间歇式反应器热失控情景研究:以酯化反应为例

Analysis of batch reactor thermal runaway scenario based on synthesis reaction of isopropyl propionate

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