含碱条件下的双氧水反应失控与安全泄放特性

Runaway reaction and safety relief characteristics of hydrogen peroxide under alkali conditions

利用泄放小试实验装置,研究了双氧水在含碱条件下的热失控特性和泄放条件对安全泄压规律的影响,分别考察了密闭条件下双氧水浓度、碱液浓度和搅拌速率对双氧水分解特性的影响,也考察了不同泄放条件下双氧水的泄放特点。实验结果表明:双氧水浓度和碱液浓度越高,搅拌不均匀,会增加双氧水热失控危险。泄放口径越大,泄放效率越高,在工艺条件允许的情况下,应尽量放大泄放口径;高泄放压力可以提高泄放效率,同时保留较充裕的工艺操作空间,但是过高的泄放压力可能导致体系积聚的能量无法及时泄出。

By using the vent simulation test device of bench scale, the influence of thermal runaway characteristics and relief conditions of hydrogen peroxide under alkali conditions on safety venting law was studied.The influences of hydrogen perox- ide concentration, alkali concentration, and stirring speed on hydrogen peroxide decomposition characteristics under the con- dition of enclosed test environment were investigated respectively, and venting characteristics of hydrogen peroxide under dif- ferent relief conditions were also discussed,The experimental results showed that the higher concentrations of hydrogen per- oxide and alkali, and uneven stirring will increase the risk of thermal runaway of hydrogen peroxide.The larger is the vent aperture,the higher is the vent effficiency.Therefore,if the process conditions allow,the vent aperture should be enlarged as big as possible.Higher vent pressure was also good for improving the vent efficiency and retain enough room for operation. However, the extra-high vent pressure may cause the accumulated energy could not release timely.