In this study, the thickness and wax content of wax deposits were found to be thinner and lower in the polyethylene (PE) pipe than in the stainless steel (SS) pipe using a flow loop apparatus. The diffusivity of wax, radial thermal gradient, and wax precipitation rate in the PE and SS pipes were calculated and compared. It was found the diffusivity of wax in the PE pipe was higher and tended to enhance the wax deposition in the PE pipe, while the radial thermal gradient and wax precipitation rate were lower in the PE pipe and had the opposite effects. These factors are shown to be comparable with each other and the effect of the thermal gradient dominates the mass flux of wax from bulk to the oil‐deposit interface and into the deposits finally, thus causing differences in thickness and wax content of deposits between the PE and SS pipes.

中文翻译：

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使用流动回路研究聚乙烯管中蜡沉积物的厚度和蜡含量。

在这项研究中，发现使用流动回路设备，聚乙烯（PE）管中的蜡沉积物的厚度和蜡含量比不锈钢（SS）管中的蜡厚度更薄且更低。计算并比较了PE和SS管中蜡的扩散率，径向热梯度和蜡的沉淀速率。发现蜡在聚乙烯管中的扩散率较高，并倾向于增强蜡在聚乙烯管中的沉积，而径向热梯度和蜡沉淀率在聚乙烯管中较低，并且具有相反的作用。这些因素相互之间具有可比性，并且热梯度的影响主导了蜡从本体到油沉积界面并最终进入沉积物的质量通量，从而导致了PE之间沉积物厚度和蜡含量的差异和SS管道。