Abstract

Threshold crude oil fouling models use activation energy in the deposition rate term to predict the initial fouling rates. It has been reported in the literature that fluid velocity has a strong influence on activation energy, which does not agree well with the principles of chemical reaction engineering. Besides, the existing threshold fouling models always predict an increase in the fouling rate with an increase in film temperature. Several studies reported in the literature reveal that many test crude oils exhibited a decrease in fouling rate with an increase in film temperature caused by an increase in bulk temperature. It is, therefore, necessary to develop a threshold fouling model that is free from the use of activation energy in the model, and that predicts the initial fouling rates correctly for all types of crude oils and fouling mechanisms. In the present study, a modified threshold fouling model has been proposed by introducing a bulk temperature-dependent constant in the place of activation energy and validated with experimental data from our laboratory and data from the literature.

摘要

阈值原油结垢模型使用沉积率项中的活化能来预测初始结垢率。文献报道流体速度对活化能有很大影响，这与化学反应工程的原理不太吻合。此外，现有的阈值污垢模型总是预测污垢率随着薄膜温度的增加而增加。文献中报道的几项研究表明，许多测试原油表现出结垢率随着整体温度升高引起的膜温度升高而降低。因此，有必要开发一种在模型中不使用活化能的阈值污染模型，这可以正确预测所有类型的原油和结垢机制的初始结垢率。在本研究中，通过引入体积温度相关常数代替活化能，提出了一种改进的阈值污染模型，并用我们实验室的实验数据和文献数据进行了验证。