Abstract

The behavior of a two-phase flow inside the inlet pipeline of a catalytic reactor is investigated. In addition to the classical approach using familiar flow diagrams, means of computational fluid dynamics are used for three-dimensional modeling of the spatial distribution of phases in the pipeline during operation. Results show a nonuniform distribution of the liquid phase over the over the pipeline outlet cross section surface, plus a mass flow of the liquid phase that is not stable over time. The maximum peak flow rates exceed the average values by ~300%. Compared to data from flow diagrams, CFD modeling shows that a change in the gas flow in the investigated range does not alter the nature of a two-phase flow, but an increase in the gas flow reduces the irregularity of the distribution of the liquid phase over the pipeline outlet cross section. Data on the behavior of a flow are needed to design catalytic reactor structures that ensure the uniform distribution of a two-phase flow to the catalyst bed for, e.g., hydrotreating reactors in the oil refining industry.

中文翻译：

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入口处进入催化反应器的两相气液流的行为

摘要

研究了催化反应器入口管道内部两相流的行为。除了使用熟悉的流程图的经典方法外，计算流体动力学方法还用于在运行过程中对管道中相的空间分布进行三维建模。结果表明，液相在管道出口横截面上的分布不均匀，加上液相的质量流量随时间推移而不稳定。最大峰值流速超过平均值约300％。与流程图数据相比，CFD建模表明，在研究范围内，气流的变化不会改变两相流的性质，但是气流的增加会减少液相分布的不规则性在管道出口横截面上。