Saturation models of oleophilic coalescing filters

CHANG Cheng; JI Zhongli; LIU Jialin

doi:10.11949/0438-1157.20200426

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Saturation models of oleophilic coalescing filters

Separation engineering | 更新时间：2026-07-24

- Saturation models of oleophilic coalescing filters
- CIESC Journal Vol. 71, Issue 12, Pages: 5610-5619(2020)
- 作者机构：
  
  1.中国石油大学（北京）石油工程学院，北京 102249
  2.中国石油大学（北京）机械与储运工程学院，过程流体过滤与分离技术北京市重点实验室，北京 102249
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200426
  CLC： TE 832
- Received：24 April 2020，
  
  Revised：2020-07-04，
  
  Online First：17 December 2020，
  
  Published：05 December 2020
- 稿件说明：
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常程, 姬忠礼, 刘佳霖. 亲油型聚结滤芯饱和度预测模型研究[J]. 化工学报, 2020, 71(12): 5610-5619

CHANG Cheng, JI Zhongli, LIU Jialin. Saturation models of oleophilic coalescing filters[J]. CIESC Journal, 2020, 71(12): 5610-5619
常程, 姬忠礼, 刘佳霖. 亲油型聚结滤芯饱和度预测模型研究[J]. 化工学报, 2020, 71(12): 5610-5619 DOI： 10.11949/0438-1157.20200426.

CHANG Cheng, JI Zhongli, LIU Jialin. Saturation models of oleophilic coalescing filters[J]. CIESC Journal, 2020, 71(12): 5610-5619 DOI： 10.11949/0438-1157.20200426.

摘要

纤维聚结滤芯广泛用于压缩空气净化、发动机曲轴箱通风、加工和切割等一系列工艺过程中，用于除去气流中的液体气溶胶颗粒。由于聚结滤芯饱和度对于过滤效率及阻力具有重要影响，因此建立饱和度与滤材参数及操作条件之间的关系将有助于优化滤芯结构并提高过滤性能。目前实际工业用聚结滤芯通常由多层微米级玻璃纤维材料组成，然而现有计算模型无法用于此类滤芯的饱和度预测。因此，本文基于多种常用亲油型聚结滤芯压降及饱和度实验测试结果，根据“跳跃-通道”模型及毛细管理论建立了新的饱和度预测模型。通过与大量已发表文献数据对比发现，当饱和值大于0.2时，预测值与实验结果吻合度较好，相对偏差≤20%。随着饱和度的降低，滤芯润湿区域和非润湿区域之间界限逐渐明显，此时无需对毛细管半径进行修正。然而，新模型仍然要依靠压降测量值进行计算，这一问题需在后续工作中加以解决。

Abstract

Fibrous coalescing filters are widely used in a series of processes such as compressed air purification

engine crankcase ventilation

processing and cutting

and are used to remove liquid aerosol particles in the airflow. Pressure drop and efﬁciency of coalescence filters are greatly affected by saturation. It is of importance to establish the relationship among saturation

filter media parameters and operating conditions

which is helpful to optimize the filter design. Coalescence ﬁlters composed of thin glass fibrous media with micron fiber diameters are widely used in industry

while the saturation of which cannot be accurately predicted by the existing saturation models. This work investigated the relationship between pressure drop and saturation of multi-layered filters with different oleophilic filter media. In this study

there was no sharp boundary between wetting and non-wetting regions within filter media

thus a filter was regarded as a whole capillary system. According to the Jump-and-Channel model and capillary theory

a saturation model was developed. Compared with a large number of published literature data

it is found that when the saturation value is greater than 0.2

the predicted value is in good agreement with the experimental results

and the relative deviation is ≤20%. With the decrease in saturation

the boundaries become more and more obvious between the wetting and non-wetting regions. In this case

there is no need to modify to the capillary radius in the developed model. However

the developed model was also limited by the need for the channel pressure drop measurement

which should be solved in further work.

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references

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