A stochastic model to describe the operation of knitted mesh mist eliminators, computation of separation efficiency
A stochastic model to describe the operation of knitted mesh mist eliminators, computation of separation efficiency
复制标题
描述针织网状除雾器运行的随机模型，分离效率的计算
DOI：
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发表时间：
1993
影响因子：
3.9
通讯作者：
G. Davies
中科院分区：
文献类型：
--
作者：
D. Feord;E. Wilcock;G. Davies
用于设计和预测除雾器性能的方法存在缺陷，因为它们不能预测出口气流中分散液体的出口浓度。这是许多工艺应用中规定的要求，特别是在大气分散之前的气体处理中。提出了一个模型，确定通过编织网除雾器的液滴的轨迹的基础上，从出口气体浓度和液滴的大小分布在此气流中可以指定。该模型预测了预期的性能变化，即分离效率随着进料混合物中液滴尺寸和气体速度的降低而降低。预测了一个极限速度，在该速度下，从垫中排出的液体减少。这与洪水条件相对应。定量预测的极限速度比较以及与空气-水系统的实验测量结果。该模型提供的前景的优化垫的建设，以最大限度地提高分离效率在目标压降或设计到最大的压降。对于所有设计，可定义出口气体蒸汽的条件
Methods used to design and predict the performance of mist eliminators are deficient in their inability to predict the outlet concentration of dispersed liquid in the outlet gas stream. This is a requirement specified in many process applications especially in gas treatment prior to atmospheric dispersion. A model is proposed, based on determining the trajectory of droplets through a knitted mesh mist eliminator, from which both the outlet gas concentration and drop size distribution in this gas stream can be specified. The model predicts the expected variations in performance, a decrease in the separation efficiency with decreasing both drop size in the feed mixture and gas velocity. A limiting velocity is predicted at which the drainage of liquid from the pad decreases. This corresponds to the flooding condition. Quantitative predictions of this limiting velocity compare well with the experimental results measured for air-water systems. The model offers the prospect of optimising the pad construction to maximise the separation efficiency at a target pressure drop or designing to a maximum pressure drop. For all designs, the conditions of the outlet gas steam can be defined