Study on effects of particle size and maximum pressure drop on the filtration and pulse-jet cleaning performance of pleated cartridge filter

Li, Shihang; Wang, Fei; Xin, Jie; Xie, Biao; Hu, Shuda; Jin, Hao; Zhou, Fang

doi:10.1016/j.psep.2019.01.002

Cited by 30 publications

(13 citation statements)

References 31 publications

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“…Similar tendencies were observed by Thomas et al (2019) when studying the clogging of HEPA filters by graphite nanostructured particles. As shown by Li et al, (2019b) in the case of micronic particles, raising the pressure drop value before cleaning, i.e. increasing the deposited mass, improves the regeneration efficiency.…”

Section: Inrs Inrs Inrsmentioning

confidence: 94%

Regeneration of dust filters challenged with metallic nanoparticles: Influence of atmospheric aging

Khirouni

Charvet

Thomas

et al. 2020

Process Safety and Environmental Protection

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The aim of this study was to evaluate the regeneration efficiency of fibrous filters clogged with metallic ultrafine particles, as several complaints have been made by industrials in the metallurgical field about difficulties linked to the cleaning of filters. Aging of the dust deposits on the filters surface was also reported to be problematic. In this work, the metallic nanoparticles were generated by a pilot thermal spraying process using electric arc. Experiments were conducted on flat filters and the cleaning was performed using reverse pulse-jet. The regeneration efficiency was evaluated according to the residual pressure drop, the removed mass and the cleaned surface. Experiments revealed, under different conditions, a patchy inefficient cleaning of the clogged filters. The cleaning efficiency did not exceed 30% according to the removed mass. Clogging/unclogging cycles showed that the filtration process is highly instable as the residual pressure drop kept increasing very rapidly. The influence of atmospheric aging, i.e. exposure to different humidity conditions over time, on the filter cakes was investigated. Results showed that in presence of humidity a chemical reaction was responsible for making the deposit more adherent. The regeneration efficiency was reduced to 10% according to the removed mass after aging for 15 days under 80% humidity rate.

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Section: Inrs Inrs Inrsmentioning

confidence: 94%

Regeneration of dust filters challenged with metallic nanoparticles: Influence of atmospheric aging

Khirouni

Charvet

Thomas

et al. 2020

Process Safety and Environmental Protection

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“…After the pressure drop reaches a certain value, a pressure modulator is activated for 0.1-0.35 s, producing a pulse in the form of compressed air with a pressure of 0.4-0.6 MPa. Compressed airflowing in the opposite direction to the airflow direction during the filtration process blows out dust particles from the surface of the filter cartridge, which then falls into the dust collector [57].…”

Section: Properties Of Nano Fibre Filtration Materialsmentioning

confidence: 99%

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

Dziubak¹

2021

IJAME

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The aim of this study is to provide an experimental properties evaluation of a standard filter material (cellulose) and materials with fiber layer addition with small diameters (nanofibers). Filter media, including cellulose, used in the internal combustion engine inlet air filtration are made of high diameter fibres, approx. 15 µm. Significantly higher separation and filtration efficiency performance are obtained for materials with lower fibre diameters (nanofibres), however, at the expense of a significantly higher pressure drop, affecting the engine performance. Filter media manufacturers mainly specify the structure parameters (pore size, air permeability and thickness), without giving any information on the dust filtration performance and rate. The literature includes test results for models of different filter media structures. Filtration process modelling using polydisperse dust with particles of different shape and density and irregular filter media structure is possible using advanced computer techniques, however, the process is complex and requires many simplifications. Test results can be applied directly in the automotive industry. The data can be obtained by experimental tests on filter medium specimens, complete filter elements or air filters which are costly and time-consuming tests, however, those test methods are the most reliable. Conditions and testing methodology for intake air filter materials used in internal combustion engines were developed. Filtration and flow resistance efficiency and accuracy were done depending on test dust mass stopped per unit area. Tested materials filtration efficiency was assessed by a filtration quality factor, which includes experimentally determined efficiency and accuracy as well as flow resistance values. Much higher efficiency and filtration accuracy of dust grains below 5 µm in filtration materials with nanofibers addition compared to standard filtration material (filter paper) were demonstrated. For the same flow resistance values, filter materials with nanofibers addition accumulate smaller dust mass than standard filter paper. Usage of materials with nanofibers addition used in motor vehicles intake air filtration ensures their high efficiency and accuracy. It minimises its components wear, but at the expense of faster flow resistance increase, which shortens filter life and increases filter replacement frequency. Results obtained during the experimental research partly fill the gap when it comes to the basic material properties used in internal combustion engines intake air filter partitions production.

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“…Hence, much effort has been directed to determine the surface energy by means of experimental methods, dynamical simulations and theoretical modeling over the last few decades. Experiments determining surface tension mainly depend on the Laplace method, which relates the excess pressure at a curved surface with the principal radius of curvature at a point on the surface [ 8 ], for example maximum bubble pressure [ 9 ] and maximum pressure in a drop [ 10 ], sessile drop [ 11 ], and pendant drop [ 12 ], etc. The tested surface energy values will be varied in a range, which are affected by temperature, pressure as well as experimental errors [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Energy of Curved Surface Based on Lennard-Jones Potential

Wang

Peng

et al. 2021

Nanomaterials

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Although various phenomena have confirmed that surface geometry has an impact on surface energy at micro/nano scales, determining the surface energy on micro/nano curved surfaces remains a challenge. In this paper, based on Lennard-Jones (L-J) pair potential, we study the geometrical effect on surface energy with the homogenization hypothesis. The surface energy is expressed as a function of local principle curvatures. The accuracy of curvature-based surface energy is confirmed by comparing surface energy on flat surface with experimental results. Furthermore, the surface energy for spherical geometry is investigated and verified by the numerical experiment with errors within 5%. The results show that (i) the surface energy will decrease on a convex surface and increase on a concave surface with the increasing of scales, and tend to the value on flat surface; (ii) the effect of curvatures will be obvious and exceed 5% when spherical radius becomes smaller than 5 nm; (iii) the surface energy varies with curvatures on sinusoidal surfaces, and the normalized surface energy relates with the ratio of wave height to wavelength. The curvature-based surface energy offers new insights into the geometrical and scales effect at micro/nano scales, which provides a theoretical direction for designing NEMS/MEMS.

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Study on effects of particle size and maximum pressure drop on the filtration and pulse-jet cleaning performance of pleated cartridge filter

Cited by 30 publications

References 31 publications

Regeneration of dust filters challenged with metallic nanoparticles: Influence of atmospheric aging

Regeneration of dust filters challenged with metallic nanoparticles: Influence of atmospheric aging

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

Surface Energy of Curved Surface Based on Lennard-Jones Potential

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