The Effect of Dust Loading on Penetration and Resistance of Glass Fiber Filters

Hinds, William C.; Kadrichu, Nani

doi:10.1080/02786829708965464

Cited by 34 publications

(12 citation statements)

References 18 publications

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“…The present model accounts for end-effects, as pressure-drop depends on the average permeability that increases close to the end of the deposit since the solid volume fraction there decreases towards 0. Typically, end-effects are not considered when calculating the pressure-drop evolution (Davies, 1970;Hinds & Kadrichu, 1997;Kirsch, 1998;Spurny et al, 1969).…”

Section: Pressure-drop Evolutionmentioning

confidence: 99%

“…Podgórski (2009) estimated the penetration of nanoparticles through inhomogeneous fibrous filters neglecting flow obstruction and increased collection by deposited particles, assuming the so-called perfect sink conditions. Therefore only the upper limit of penetration was studied that changes, however, with time as it has been shown experimentally (Calle et al, 2002a;Hinds & Kadrichu, 1997).…”

Section: Introductionmentioning

confidence: 98%

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Filtration of nanoparticles: Evolution of cake structure and pressure-drop

Elmøe

Tricoli

Grunwaldt

et al. 2009

Journal of Aerosol Science

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a b s t r a c tThe detailed three-dimensional accumulation of deposits and the build-up of pressuredrop during filtration of compressible gases laden with nanoparticles (diameter d p =50 nm) through capillaries (1-4 mm radius) was investigated by Langevin dynamics (LD) at Peclet number, Pe, 0.01-10. At low Pe, highly porous (98%) deposits were formed while at higher Pe the porosity was slightly reduced including a void cone upstream of the capillary inlet. Three distinct deposition regimes were identified: capillary deposition, clogging and cake growth. At the time of clogging (t cl ), a filter cake with constant solid volume fraction began to form, accompanied with build-up of pressuredrop which was in excellent agreement with classic cake filtration theory. An expression for the solid volume fraction of the cake (f sd,c ) was obtained as a sole function of Pe. In addition, the filtration efficiency became 1 after clogging, since the cake acts as a perfectly efficient filter. Penetration of nanoparticles takes place until the onset of cake filtration at high Pe (1-10) while for smaller ones (0.01-0.1) it is negligible at the employed capillary radii and length (10 mm). Analytical expressions for the time of capillary clogging and height of the void cone were derived and were in agreement to LD simulations. The height of the void cone is in the order of one capillary diameter at high Pe.

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Section: Pressure-drop Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Filtration of nanoparticles: Evolution of cake structure and pressure-drop

Elmøe

Tricoli

Grunwaldt

et al. 2009

Journal of Aerosol Science

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“…As a result, the flow experiences higher resistance and the deposited particles enhance the collection mechanisms. The effect of particle deposition on the filtration performance (i.e., collection efficiency and pressure drop) of fibers with circular cross-section has been investigated previously in many studies (e.g., [7][8][9][10][11][12][13][14][15][16]). Although trilobal fibers are becoming increasingly more available [17][18][19][20][21], the literature is very scarce (and controversial sometimes) when it comes to using such fibers for aerosol filtration [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

On the filtration performance of dust-loaded trilobal fibers

Saleh

Tafreshi

2015

Separation and Purification Technology

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“…The studies by Walsh ( ) and Stenhouse 1997Stenhouse , 1998 showed that, depending on particle size and face velocity, particle penetration of a 20 m m ® ber Electret ® lter ne arly doubles at particle loadings of 3 ] 5 g rm 2 . Although these studies were conducted in a limited range of 1993, Japuntich et al 1997, and Hinds ( ) and Kadrichu 1997 For each particle size and type, estimates of the average increase in pressure drop with particle loading were obtaine d by performing linear regression between the increase in pressure drop and the particle loading data. The results of the linear regression are summarized in Table 2.…”

Section: Capacity Testsmentioning

confidence: 99%

Electrostatic Enhancement of the Collection Efficiency of Stainless Steel Fiber Filters

Kim¹,

Sioutas²,

Chang³

2000

Aerosol Science and Technology

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ABSTRACT. This study investigated the effect of using a stainless steel ® brous ® lter as the ground electrode of a point-to-plate electrostatic precipitator on particle penetration. The effect of the electrical ® eld on particle penetration was ( ) investigated at 4 different ® lter face velocities 25, 50, 100, and 125 cm r r r r r s for ( ) monodisperse PSL and silica particles size ran ge 0.05 ± 1 m as well as polydisperse ammonium sulfate, ammonium nitrate, and ultra® ne indoor air particles. Particle penetration was greatly reduced by the application of the electrical ® eld. By comparison, the performance of electrically active ® brous ® lters h as been shown to rapidly degrade as particle loading exceeds 2± 3 g r r r r r m 2 . The effect of particle loading on particle penetration was also investigated at a ® lter face velocity of 50 cm r r r r r s. Particle penetration seemed to slightly decrease with particle loading and was independent of particle size. These results indicated th at the accumulation of nonconductive particles up to 15 cm 3 r r r r r m 2 does not create``back corona,'' wh ich would substantially decrease the collection ef® ciency of the grounded ® lter. In conclusion, our experiments suggest th at using metal ® lters as the collector electrodes may be an attractive alternative design for electrostatic precipitators.

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The Effect of Dust Loading on Penetration and Resistance of Glass Fiber Filters

Cited by 34 publications

References 18 publications

Filtration of nanoparticles: Evolution of cake structure and pressure-drop

Filtration of nanoparticles: Evolution of cake structure and pressure-drop

On the filtration performance of dust-loaded trilobal fibers

Electrostatic Enhancement of the Collection Efficiency of Stainless Steel Fiber Filters

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