环己酮氨肟化工艺最危险场景确定  

Determination of the most dangerous scenario in cyclohexanone ammoximation process

作　　者：喻健良[1] 闫兴清[1] 刘显凡[1] 孟庭宇[2] 谢传欣[2] 

机构地区：[1]大连理工大学化工机械学院,辽宁大连116024 [2]中国石化青岛安全工程研究院化学品安全控制国家重点实验室,山东青岛266071

出　　处：《化学工程》2012年第4期67-69,78,共4页Chemical Engineering(China)

摘　　要：环己酮氨肟化工艺是制取化工原料的重要工艺,但该反应具有放热失控风险。为了确定氨肟化反应的最危险场景,筛选了环己酮氨肟化工艺可能存在的6个危险场景,并对每一危险场景设定了实验方案。采用泄放设计装置Ⅱ(VSP2)绝热量热仪对每一场景对应的方案进行了量热实验,实验发现:环己酮氨肟化反应为快速强放热反应,能够使反应体系的温度瞬间提高至200℃左右。反应结束后,继续升高温度,无二次反应失控。双氧水质量分数过高是环己酮氨肟化工艺最危险场景。针对氨肟化反应的泄放设计,必须以此场景作为设计依据。建议对双氧水进料线进行重点监控,以防止反应失控发生。Venting design of reaction runaway is the key to prevent pressure vessels from overpressure resulting from exothermic runaway reaction.The determination of the most dangerous scenario is essential in the runaway reaction venting design approach.Cyclohexanone ammoximation is an important process for producing chemical materials.Whereas,exothermic runaway may occur in the cyclohexanone ammoximation reaction.In order to obtain the most dangerous scenario,six dangerous scenarios probably taking place in the cyclohexanone ammoximation process were determined.The experimental schemes were discussed corresponding to each scenario.The calorimeter experiments in all schemes were conducted by using Venting Sizing Package 2（VSP2） adiabatic calorimeter.The results demonstrate that the cyclohexanone ammoximation reaction is an intensive exothermic process.The temperature in reaction system can rise up to 200 ℃ instantaneously.No secondary exothermic reaction is detected when increasing temperature after the first reaction runaway.Hydrogen peroxide with excessively high concentration is deemed as the worst case scenario,and this scenario should be adopted in the runaway reaction venting design.It is suggested that the feeding line of hydrogen peroxide should be mainly inspected to prevent the reaction from runaway.

关 键 词：环己酮氨肟化 反应失控 危险场景 泄放设计装置Ⅱ(VSP2) 

分 类 号：TQ236[化学工程—有机化工]