水平圆管内油水两相旋流分隔性能分析与评价

油水分离后的测量技术广泛应用于石油开发、污水处理及化学工程等领域.如何实现快速高效的油水分隔,是精密测量领域的关键技术之一.目前,油水分隔器的结构形式较为多样,有必要开展不同分隔器的性能对比和评价研究.采用粒子成像测速技术、分隔性能实验及数值模拟等方法,对三种不同结构水力旋流器的分隔性能进行对比分析,形成了一种用于水平...

Analysis and evaluation of oil-water two-phase centrifugal separation performance in horizontal pipe

The particle image velocimetry technology, separation performance experiment and numerical simulation methods of separation performance were applied to analyze the separation performance of three kinds of hydrocyclones. The method for evaluating the performance of oil?water two-phase separation in a horizontal circular pipe was established. The results showed that the helix separator and the diversion vane separator can form axial reflux in a axial central region of the flow field, and there were different locus of zero vertical velocity in the two structures. When the inlet Reynolds number was 6.68×104, although the diversion vane separator formed a rotating flow with the maximum tangential velocity, the attenuation rate of tangential velocity was also the largest, and the value of maximum tangential velocity attenuation rate within the 500 mm length was 94.05%. The oil core formed by the helix separator had a better degree of aggregation with the maximum oil volume fraction at the axis of the pipe. In order to quantitatively evaluate the performance of separators with different structures, the calculation method of oil?water separation efficiency in circular pipe was established by taking the concentration of oil core and the extension length of oil core in the pipe. By comparing the separation efficiency of the three structures under different Reynolds numbers, the helix separator showed the best separation performance. When the inlet Reynolds number increased in the range of 4.14×104~10.7×104, the oil?water separation efficiency of the helix separator increased from 16.6% to 82.1%, which was higher than those of the other two structures. The evaluation results of oil?water separation efficiency showed the consistent regularity as the experimental results, which verified the accuracy of the proposed separation efficiency evaluation method.