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因油中携带的溶解了腐蚀性杂质的水在管道低点或流动死区聚集导致管道内腐蚀而发生穿孔的问题越来越突出,基于此,针对管输原油含水量低、原油透光性弱、难以通过传统的试验方法确定油水两相流的流动状态的问题,运用流体仿真软件Star-ccm+,结合输油管道实际工况,对低含水率(含水量体积分数不高于1%)的原油在管道内的油水两相流进行模拟计算,结果表明:当前输油条件下,距离三通2 m后的盲管段内的流体基本不再流动,管道底部水的体积分数比管道上部高12.2%,水发生明显沉降,据此,对输油站内管道腐蚀情况进行预测,进而确定了安全运行重点监测部位。
Due to oil in the corrosive impurities dissolved water in the pipeline low or flowing dead zone lead to corrosion within the pipeline and the formation of perforation problems have become increasingly prominent, based on this, for crude oil pipelines with low water content, oil translucency Weak, it is difficult to determine the flow state of oil-water two-phase flow by the traditional test methods. Using the software Star-ccm +, combined with the actual working conditions of oil pipeline, the low moisture content (water content less than 1% The results show that under the condition of current oil transportation, the flow in the blind pipe section after 2 meters of tee basically no longer flows, and the volume fraction of water at the bottom of the pipe is 12.2 higher than the upper part of the pipe %, The apparent subsidence of water, accordingly, the pipeline corrosion in the oil station to predict the situation, and then determine the safe operation of key monitoring sites.