摘要
通过分析成品油管道清管杂质中铁锈和水的来源,指出管道不断产生杂质的原因是管道投产期间水压试验过程中低洼处积水引起的管道内腐蚀。提出了油流携水的积水排除方法。为研究油流携水系统的流型、积水分布以及出水量,分别利用透明管、钢管对积水在油流冲刷作用下的运动形态和出水量大于0的临界条件进行了实验研究。借助由下倾、水平、上倾3段测试管段组成的内径为15mm的玻璃管和内径为25mm的塑料管两套实验系统,采用柴油和水分别对积水分布形态进行了观察,并利用内径为27mm的钢管实验系统对上倾管段不同位置的出水量进行测量。在实验范围内,油相流量较小时,积水以近壁偏心大水滴的形式在油流携带下向前爬行;随油相流量增大,偏心大水滴下游被打散成小水滴进入油流;油相流量越大,大水滴经过的距离越长,出水量越大。
This paper shows causes of constant impurities occurred in pipeline by analyzing rust and origins in pig impurities of products pipeline,that is,the internal corrosion of pipeline was brought by water deposition in lower location of pipeline during its hydrotest in pipeline commissioning period.It brings out dewatering methods for oil carrying water.To study the flow pattern of oil carrying water system,distribution and volume of water deposition,experimental study on the movement form of water deposition flushed by oil flow and the water volume greater than zero at critical condition are made with transparent tube and steel tube.Diesel oil and water are used in order to observe the distribution shape of water deposition by means of a 15 mm(inner diameter) glass tube comprised of downward,level and upward testing sections and a 25 mm(inner diameter)plastic tube experimental system.Meanwhile,a 27 mm(inner diameter)steel tube is used as the experimental tool to measure the water volume in different position of upward pipe.Water deposition tends to move forward by oil carrying in a form of wall-closed exocentric big water drop when velocity of oil phase is comparatively slower;increasing velocity of oil phase will scatter the lower part of exocentric big water drops into small ones;the bigger the flow rate of oil is,the longer the distance of big water drop travelled is and the higher the water volume is.
出处
《油气储运》
CAS
北大核心
2011年第5期369-372,375,共5页
Oil & Gas Storage and Transportation
关键词
成品油管道
内腐蚀
偏心大水滴
积水
油流携水
油水两相流
products pipeline,internal corrosion of pipeline,exocentric big water drop,water deposition,oil carrying water,oil/water two-phase flow
