泄爆导管对球形容器内气体爆炸泄放过程影响的试验

发布时间：2018-06-05 16:11

本文选题：安全工程 + 气体爆炸　；参考：《安全与环境学报》2015年02期

【摘要】：设计了球形容器内气体爆炸通过导管泄爆的试验系统,选用体积分数为10%(特殊说明除外)的甲烷和空气预混气体开展试验,研究了泄爆导管长度、容器容积、点火位置、气体体积分数、破膜压力等因素的影响。结果表明:泄爆导管越长,容器内的正压力峰值和负压力峰值越大;密闭爆炸时,球形容器的容积对爆炸压力峰值几乎无影响;不同容积球形容器内气体爆炸通过相同导管泄爆时(导管长度均为6 m,直径均为0.06 m),容积大的容器内的压力锋值为小容器压力值的3.3倍,且大容器内的压力上升速率也明显高于密闭爆炸的情况;有泄爆导管存在时,尾部点火容器内的压力峰值高于中心点火;泄爆导管的存在使得容器内的压力峰值高于直接泄爆时的压力峰值;无论有、无泄爆导管,容器内的压力峰值均随破膜压力增加而增加,但差值越来越小,说明导管的存在对容器爆炸泄爆过程的影响趋向缓和,但导管的存在总是阻碍了泄爆过程,增加了爆炸的严重程度,因此,在泄爆设计时要充分考虑导管的影响,适当提高容器自身的耐压强度。
[Abstract]:A test system for gas explosion in a spherical vessel was designed. Methane and air premixed gas with volume fraction of 10 (except special description) were selected to carry out the test. The length of vent tube, vessel volume and ignition position were studied. Gas volume fraction, film breaking pressure and other factors. The results show that the longer the venting tube is, the greater the peak value of positive and negative pressure is in the vessel, and the volume of the spherical vessel has little effect on the peak value of explosion pressure during the closed explosion. When the gas explosion in a spherical vessel with different volumes passes through the same vessel (the length of the tube is 6 m, the diameter is 0.06 mL, the pressure front value in the larger vessel is 3.3 times the pressure value of the small vessel, The pressure rise rate in the large vessel is obviously higher than that in the closed explosion case, and the peak pressure in the tail igniting vessel is higher than that in the center igniting vessel when there is a venting tube. The peak pressure in the vessel is higher than that in the direct venting tube, and the peak pressure in the vessel increases with the increase of the membrane breaking pressure, but the difference is smaller and smaller. It shows that the influence of catheter on vessel explosion and explosion process tends to be moderated, but the existence of vessel always hinders the process of explosion discharge and increases the severity of explosion. Therefore, the influence of catheter should be fully taken into account in the design of explosion. Properly improve the pressure resistance of the container itself.
【作者单位】：南京工业大学城市建设与安全工程学院江苏省城市与工业安全重点实验室;
【基金】：国家自然科学基金项目(51376088) 江苏省高校自然科学基金项目(12KJB620001) 江苏省普通高校研究生科研创新计划项目(CXZZ12-0452)
【分类号】：X932

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