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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Radiotracer method for residence time distribution study in multiphase flow system.
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Radiotracer method for residence time distribution study in multiphase flow system.

机译：用于多相流系统中停留时间分布研究的Radiotracer方法。

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[(131)I] isotope in different chemical compounds have been injected into 24in hydrocarbon transmission pipeline containing approximately 95% water, 3% crude oil, 2% gas and negligible solid material, respectively. The system is operated at the temperature around 70 degrees C enabling fluids flow is easier in the pipeline. The segment of measurement was chosen far from the junction point of the pipeline, therefore, it was reasonably to assume that the fluids in such multiphase system were separated distinctively. Expandable tubing of injector was used to ensure that the isotopes were injected at the proper place in the sense that [(131)I]Na isotope was injected into water layer and iodo-benzene, ([131])IC(6)H(5,) was injected into crude oil regime. The radiotracer selection was based on the compatibility of radiotracer with each of fluids under investigation. [(131)I]Na was used for measuring flow of water while iodo-benzene, ([131])IC(6)H(5,) was used for measuring flow of crude oil. Two scintillation detectors were used and they are put at the distances 80 and 100m, respectively, from injection point. The residence time distribution data were utilized for calculation water and crude oil flows. Several injections were conducted in the experiments. Although the crude oil density is lighter than the density of water, the result of measurement shows that the water flow is faster than the crude oil flow. As the system is water-dominated, water may act as carrier and the movement of crude oil is slowed due to friction between crude oil with water and crude oil with gas at top layer. Above of all, this result was able to give answer on the question why crude oil always arrives behind water as it is checked at gathering station. In addition, the flow patterns of the water in the pipeline calculated by Reynolds number and predicted by simple tank-in-series model is turbulence in character.
机译：已将不同化学化合物的[（131）I]同位素注入到烃类输送管道中的24种烃中，分别包含约95％的水，3％的原油，2％的气体和可忽略不计的固体物质。该系统在约70摄氏度的温度下运行，使管道中的流体更容易流动。测量段的选择远离管道的交汇点，因此，可以合理地假设这种多相系统中的流体是明显分开的。使用注入器的可扩展管，以确保在将[（131）I] Na同位素注入水层和碘苯，[[131]）IC（6）H（ 5）注入原油制度。放射性示踪剂的选择基于放射性示踪剂与所研究的每种流体的相容性。 [（131）I] Na用于测量水流量，碘代苯，（[131]）IC（6）H（5，）用于测量原油流量。使用了两个闪烁检测器，它们分别距注入点80和100m。停留时间分布数据用于计算水和原油流量。在实验中进行了几次注射。尽管原油密度比水密度轻，但测量结果表明水流比原油流快。由于该系统以水为主，因此水可能充当载体，并且由于原油与水之间的摩擦以及原油与顶层之间的气体之间的摩擦，原油的移动变慢了。最重要的是，这个结果能够回答为什么原油在采集站检查时总是总是滞后于水的问题。此外，由雷诺数计算并由简单的串联罐模型预测的管道中水的流动方式具有湍流特征。

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