过氧乙酸生产过程热失控超压因素影响研究

发布时间：2018-05-08 23:12

本文选题：过氧乙酸生产 + 热失控　；参考：《化学工程》2017年06期

【摘要】：利用过氧化工艺生产过氧乙酸过程中易发生热失控反应,造成反应器超压。文中采用高压反应装置,以反应体系最大压升速率为指标,通过正交试验考察了反应物配比、催化剂用量及已反应时长等因素及其交互作用对反应体系超压危险性的影响。发现反应物配比对最大压升速率有显著影响,已反应时长对其有影响但不十分显著,而浓硫酸体积分数及3个因素间的交互作用对其无显著影响。在此基础上,忽略无显著影响的因素,通过单因素实验进一步分析了反应物配比和已反应时长对体系超压危险性的影响机制。研究表明:在反应失控阶段,若双氧水占比较低,则过氧乙酸分解主导气体生成,随着双氧水占比增大,双氧水分解逐渐主导气体生成,且失控反应更加剧烈;随着已反应时长的增大,用于造成热失控的反应热减少,体系超压危险性降低。
[Abstract]:During the production of peracetic acid by peroxidation process, it is easy to lose control of heat and cause overpressure in the reactor. With the maximum pressure rise rate of reaction system as the index, the effects of the ratio of reactants, the amount of catalyst and the length of reaction time on the risk of overpressure in the reaction system were investigated by orthogonal test. It was found that the ratio of reactants had a significant effect on the maximum pressure rise rate, but the length of reaction time had little effect on it, while the volume fraction of concentrated sulfuric acid and the interaction of three factors had no significant effect on it. On the basis of this, the influence mechanism of reactant ratio and reaction time length on the overpressure risk of the system was further analyzed by single factor experiment. The results show that in the reaction runaway stage, if hydrogen peroxide is low, peracetic acid decomposes the dominant gas, and with the increase of hydrogen peroxide ratio, the hydrogen peroxide decomposition gradually dominates the gas formation, and the runaway reaction becomes more intense. With the increase of reaction time, the reaction heat used to cause thermal runaway decreases and the risk of overpressure decreases.
【作者单位】：大连理工大学化工机械与安全学院;
【分类号】：TQ086.3;TQ223.25

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