Effect of Pore Characteristics on Filtration Performance of Filter Bag

doi:10.12068/j.issn.1005-3026.2024.11.014

Abstract

Abstract:

To study the effect of pore characteristics on filtration performance of filter bag， the maximum pore size and mean pore size of thirteen kinds of samples are determined by bubble?point method， mainly including needled filter bag， spunlace filter bag and membrane covered filter bag. In addition， the pore distribution characteristics of needled filter bag and spunlace filter bag are also analyzed by a combination of scanning electron microscope and Image-pro plus 6.0. The results show that the maximum pore size and mean pore size of needled filter bag are larger than those of the spunlace filter bag， and the pore size of the membrane covered filter bag is the lowest one. The maximum pore size and mean pore size of the internal pore throat have an effect on the air permeability， filtration efficiency and pressure drop of filter bags. Air permeability increases with the increase of pore size. The filtration efficiency increases with the decrease of pore size. Additionally， the pore distribution of spunlace filter bag is more concentrated and uniform than other kinds of filter bags， which has a certain degree of influence on the improvement of filtration efficiency of filter materials.

Key words: filter bag, pore size distribution, air permeability, fractional counting efficiency, pressure drop

CLC Number:

TS 174

Jing-xian LIU, Ya-fei LI, Chao LYU, Han-peng ZHAO. Effect of Pore Characteristics on Filtration Performance of Filter Bag[J]. Journal of Northeastern University(Natural Science), 2024, 45(11): 1629-1637.

Figures/Tables 14

References 27

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编号	生产厂家	样品类型	面密度/(g·m^-2)	厚度/mm
1#	ZJHS	针刺毡	687.85	1.64
2#	EEDS	针刺毡	539.56	1.52
3#	FSXDF	针刺毡	597.78	1.43
4#	HHHT	针刺毡	594.07	1.46
5#	ZZYB	超细海岛纤维+针刺毡	535.85	2.11
6#	JH	水刺毡	543.56	1.79
7#	JH	水刺毡	705.48	1.35
8#	JH	水刺毡	741.93	1.40
9#	HSWX	PTFE覆膜针刺毡	814.67	1.05
10#	HSWX	PTFE覆膜针刺毡	568.00	1.93
11#	HSWX	PTFE覆膜针刺毡	628.67	2.03
12#	JSFS	覆膜玻纤机织布	814.67	0.93
13#	YSRD	PTFE覆膜针刺毡	573.78	1.66

编号	生产厂家	样品类型	面密度/(g·m^-2)	厚度/mm
1#	ZJHS	针刺毡	687.85	1.64
2#	EEDS	针刺毡	539.56	1.52
3#	FSXDF	针刺毡	597.78	1.43
4#	HHHT	针刺毡	594.07	1.46
5#	ZZYB	超细海岛纤维+针刺毡	535.85	2.11
6#	JH	水刺毡	543.56	1.79
7#	JH	水刺毡	705.48	1.35
8#	JH	水刺毡	741.93	1.40
9#	HSWX	PTFE覆膜针刺毡	814.67	1.05
10#	HSWX	PTFE覆膜针刺毡	568.00	1.93
11#	HSWX	PTFE覆膜针刺毡	628.67	2.03
12#	JSFS	覆膜玻纤机织布	814.67	0.93
13#	YSRD	PTFE覆膜针刺毡	573.78	1.66

样品编号	第1冒泡点压力	最大孔径	群泡点压力	平均孔径
样品编号	kPa	μm	kPa	μm
1#	0.82	109.03	0.89	95.79
2#	0.78	113.43	0.92	96.53
3#	1.02	86.67	1.08	82.03
4#	0.86	104.07	1.05	84.98
5#	0.71	124.49	0.89	99.50
6#	0.85	104.99	0.93	96.37
7#	1.00	89.47	1.10	81.18
8#	1.07	83.14	1.19	74.80
9#	1.19	72.85	1.70	50.76
10#	0.91	95.13	1.20	72.05
11#	0.79	109.30	1.68	51.61
12#	0.79	112.78	1.05	84.43
13#	1.17	74.61	1.38	62.75

样品编号	第1冒泡点压力	最大孔径	群泡点压力	平均孔径
样品编号	kPa	μm	kPa	μm
1#	0.82	109.03	0.89	95.79
2#	0.78	113.43	0.92	96.53
3#	1.02	86.67	1.08	82.03
4#	0.86	104.07	1.05	84.98
5#	0.71	124.49	0.89	99.50
6#	0.85	104.99	0.93	96.37
7#	1.00	89.47	1.10	81.18
8#	1.07	83.14	1.19	74.80
9#	1.19	72.85	1.70	50.76
10#	0.91	95.13	1.20	72.05
11#	0.79	109.30	1.68	51.61
12#	0.79	112.78	1.05	84.43
13#	1.17	74.61	1.38	62.75

编号	斜率	标准误差
1#	18.42	0.02
2#	18.46	0.18
3#	35.92	0.35
4#	20.93	0.20
5#	11.54	0.68
6#	12.15	0.14
7#	22.82	0.14
8#	25.03	0.17
9#	131.94	0.74
10#	68.86	0.36
11#	71.26	0.50
12#	62.46	0.42
13#	72.51	1.18