Lab-scale design of two layers wood cellulose filter media to maximize life span for intake air filtration

Qian Yang,Bianzhi Zhang,Jianquan Hu,Zhong Liu,Guodong Zhao,Lanfeng Hui,Yinglong Wu

doi:10.1038/s41598-021-82855-4

Qian Yang, Bianzhi Zhang + Show 5 more

Open Access

https://doi.org/10.1038/s41598-021-82855-4

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Abstract

The requirement of continuous and stringent growth on filtration performance, including longer life span, higher overall efficiency, lower initial pressure drop and more cost effective, has still drove filter media manufactures to research and develop. One of the possible way to achieve these challenges, was to utilize a dual-channel head-box with two sets of pulp conveying system, which can produce filter media with bulky and gradient properties. In this study, three kinds of commercial cellulose were chosen to make two layers filtration media, analyzed the effect of fiber blend on physical properties and filtration performance. By fine-tune the slurry ratio of top layer, we made one single layer and two layers composition filter media, the thickness and air permeability of composition media were higher than single layer media. According to ISO 5011, filtration performance test has been done to compare single layer media with composition media, this composition gradient profiles that provided the life span 37.0% improvement to the terminal pressure drop during dust injecting, and the dust hold capacity improved 34.7%, the main contributor of dust hold capacity was decided by top layer, however, the overall efficiency was depended on wire side layer.

Highlights

The requirement of continuous and stringent growth on filtration performance, including longer life span, higher overall efficiency, lower initial pressure drop and more cost effective, has still drove filter media manufactures to research and develop
The obtained filtration media was tested according to ISO 501118, it was found that the life span to desired pressure drop improved 37%, and dust hold capacity increased 34.7%, the overall efficiency of all the samples were more than 99.5%, which can meet original equipment manufacture’s requirement
Include two composition double layers (Nos. 4 and 5) and one single layer (No 6) filter media were made with specific fiber blend for each layer to analysis how to effect filtration performance

Summary

Introduction

The requirement of continuous and stringent growth on filtration performance, including longer life span, higher overall efficiency, lower initial pressure drop and more cost effective, has still drove filter media manufactures to research and develop. From the filter media manufacture point of view, the continuous challenge was to develop higher filtration performance filter media, but competitive p rice[3] It has already well established in previous literature that multi-layer technology had unique and advantages to result in gradual and relatively slow increase in pressure drop and enlarge engine life time, especially can improve dust hold capacity obviously. Species Softwood Hardwood Softwood to enhance filtration e fficiency[14,15] These non-renewable and high cost fossil materials were used to fit these advanced methods can be damaged during pleating process, so these methods made air filter element more complicated and expensive for automobile filtration m arket[16]. The obtained filtration media was tested according to ISO 501118, it was found that the life span to desired pressure drop improved 37%, and dust hold capacity increased 34.7%, the overall efficiency of all the samples were more than 99.5%, which can meet original equipment manufacture’s requirement

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Conclusion