洞库大落差管水力计算  

Hydraulic calculation of big fall pipe in cavern

作　　者：倪玲英[1] 谢翠丽[1] 李成华[1] 

机构地区：[1]中国石油大学(华东),山东青岛266555

出　　处：《油气储运》2011年第12期917-918,5-6,共2页Oil & Gas Storage and Transportation

摘　　要：地下洞库储存油品自由卸油落差大,进洞库的落差管段中液流流动状态特殊,若设计不当可能引发落差管水锤振动、负压气蚀、气液混合等一系列负面问题。基于对大落差管的水力工况分析,应用能量方程进行洞库大落差管实例水力计算和分析论证,结果表明:落差管在空管投油的不稳定过程中,惯性水头起阻力作用,消耗了落差管中的剩余能量;在稳定生产过程中,适当减小管径、在落差管下端增设水平管、增加局部能量消耗部件,是增加能耗行之有效的处置技术。The oil stored in cavern has a big free fall,and the flowstate of fluid within the inlet pipe is special.The improper design may trigger the fall pipe vibration from water hammer,negative pressure cavitations,gas-liquid mixture and a series of problems.Based on the hydrodynamic condition analysis of big fall pipe,energy equations were applied to hydraulically calculate and demonstrate a cavern case.Results showed that in the instability process of 'empty pipe' under the condition of running,inertia head of the fall pipe played a role of 'resistance',which consumed the residual energy in the fall pipe.In a stable production process,to properly reduce the diameter of big fall pipe,install a horizontal tube with a certain length at the bottom of the fall pipe and set up some energy-consuming components are reasonable and effective disposal technology to speed up the energy consumption.

关 键 词：洞库 大落差 管道 水力计算 不稳定 

分 类 号：TE81[石油与天然气工程—油气储运工程]