直径700mm管道内瓦斯爆炸及抑爆试验

Experiment on Gas Explosion and Restricted Explosion in φ700mm Pipeline

为了保障低浓度瓦斯输送过程中的安全,利用直径700 mm、长96 m的管道模拟低浓度瓦斯输送管道,进行了全管道瓦斯爆炸传播及抑爆试验。瓦斯爆炸传播试验表明:瓦斯爆炸压力由爆炸源起至50 m区间有减小的趋势,50 m后明显增大,封膜前段压力大幅上升;火焰速度随距离增大逐渐增大,过50 m后火焰速度明显增加。抑爆试验采用的抑爆装置由火焰传感器、抑爆器、控制器组成,喷洒滞后时间不大于15 ms,抑爆试验表明:抑爆装置能在距爆炸源25 m处有效扑灭爆炸火焰,能防止后部瓦斯参与爆炸,并使后部压力逐渐减小。

In order to ensure the safety in the low density gas transportation process, a pipeline with the diameter of 700 mm and the length of 96 m was applied to simulate the low density gas transportation pipeline for an experiment research on a full pipeline gas explo- sion spreading and restriction. The gas explosion spreading experiment showed that the gas explosion pressure would be in a reducing tendency from the explosion source to the 50 m section, after the 50 m section, the gas explosion pressure would obviously increase and the pressure before the sealing film section would highly increase. The flame speed would increase with the distance increased steadily and after 50 m, the flame speed would increase obviously. The explosion restriction device of the explosion restriction experiment was consisted with the flame sensors, explosion restrictors and controller. The water spraying time would be delayed less than 15 ms after the explosion. The explosion restriction experiment showed that the explosion restriction device was effectively to extinguish the explosion flame at a distance of 25 m to the explosion source, which could prevent the rear gas to participate in explosion and reduce the rear pressure steadily.