Weighting and Counting Efficiencies of Filter Media of Bag Dust Collector

doi:10.12068/j.issn.1005-3026.2025.20230248

Abstract

Abstract:

There are few studies on the correlation between the weighting and counting efficiencies of filter media of bag dust collector， which leads to the fact that its filtration performance cannot be accurately evaluated. Two factors that affect the weighting and counting efficiencies of the filter media were analyzed through building a filtration performance test platform. The results show that the filtration efficiency decreases with the increase of filtration velocity， and the filtration efficiency of low-efficiency filter media decreases more than that of high-efficiency filter media. Compared with alumina powder， the filtration efficiency of filter media under atmospheric dust source environment is more easily affected by the filtration velocity. The weighting and counting efficiencies of low-efficiency filter media under the two kinds of dust sources environment are quite different. The filtration efficiency of the filter media under alumina powder environment is significantly higher than its filtration efficiency under atmospheric dust source environment. The dust source has little effect on the filtration efficiency of high-efficiency filter media. It is more reasonable to use both the weighting and counting efficiencies to characterize the filtration performance of filter media.

Key words: filter media, filtration performance, evaluation index, weighting efficiency, counting efficiency

CLC Number:

X 701.2

Zhen-hui YU, Jing-xian LIU, Guo-dong LI, Chao LYU. Weighting and Counting Efficiencies of Filter Media of Bag Dust Collector[J]. Journal of Northeastern University(Natural Science), 2025, 46(3): 123-129.

Figures/Tables 7

Fig.1 SEM image and fiber average diameter of the filter media

Table 1 Characteristic parameters of the filter media

滤料	单位面积质量/（g·m^-2）	厚度/mm	透气率/（m·min）	阻力/Pa
涤纶针刺毡	668.79	2.27	10.33	36.00
芳纶针刺毡	559.73	2.20	15.80	24.00
PTFE覆膜针刺毡	817.80	0.99	2.90	139.33
覆膜玻纤机织布	844.59	0.84	1.87	178.00
P84针刺毡	551.59	2.10	11.63	33.67

Fig.2 Schematic diagram of filter media filtration performance test platform

Fig.3 Particle size distribution of the experimental dust source

Fig.4 PM1 weighting and counting efficiencies of filter media

Fig.5 PM2.5 weighting and counting efficiencies of filter media

Fig.6 PM10 weighting and counting efficiency of filter media

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