连通容器泄爆过程的影响因素

Influence factors of gas explosion venting in linked vessels

以甲烷/空气混合物为研究对象,开展了连通容器气体泄爆影响因素的实验研究。结果表明:连通容器泄爆片泄爆时,随着破膜压力和量纲一泄压比的减小,大、小球容器的最大泄爆压力均增大;在等量纲一泄压比条件下,随着连接管道长度的增加,传爆容器的最大泄爆压力增大。连通容器无膜泄爆时,大球点火条件下,无论管长如何,起爆容器和传爆容器均比单个容器最大泄爆压力大。小球点火条件下,当管道长度为0.45 m时,起爆容器和传爆容器的最大泄爆压力均小于单个容器。连通容器无膜泄爆且量纲一泄压比相同时,当管道长度为0.45 m时,大、小容器内的最大泄爆压力基本相等;当管道长度为2.45 m时,大容器点火时,传爆容器最大爆炸压力大于起爆容器,但小容器点火时,起爆容器最大泄爆压力大于传爆容器;当管道长度为4.45和6.45 m时,传爆容器最大泄爆压力均大于起爆容器。

A series of experiments were conducted to study the factors influencing gas explosion venting in methane-air mixture explosion in linked vessels. For the linked vessels,the maximum explosion venting pressure in both the big vessel and the small vessel increases when the rupture disk bursting pressure and the dimensionless ratio of the vent area to the vessel volume decrease. At the same dimensionless ratio,the maximum explosion venting pressure in the secondary vessel increases with the pipe length regardless of the ignition occurring in the big or in the small vessel. The maximum explosion venting pressures in the primary and in the secondary vessels are higher than that in the single vessel for ignition in the big vessel without a rupture disk.However,when the pipe length is 0. 45 m,the maximum explosion venting pressures in the primary and in the secondary vessel are lower than that in the single vessel for ignition occurring in the small vessel without a rupture disk. At the same dimensionless ratio of the vent area to the vessel volume,the maximum explosion venting pressure in the big vessel and that in the small one are close to each other when the pipe length is 0. 45 m for explosion venting in linked vessels without a rupture disk. However,when the pipe length is 2. 45 m,the maximum explosion venting pressure in the primary vessel is higher than that in the secondary vessel for ignition in the small vessel. When the pipe length is 4. 45 m or 6. 45 m,the maximum explosion venting pressure in the secondary vessel is higher than that in the primary vessel.