Cascade filtration properties of a dual-layer granular bed filter

Tian, Su-Rui; Yang, Guohua; Li, Zhen; Shi, Kai-Yu; Ding, Guo-Zhu; Hu, Fu-Xiang

doi:10.1016/j.powtec.2016.06.037

Cited by 42 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dual-layer granular beds, cascading a layer of fine granules on a layer of coarse granules, aid to achieve both high filter efficiencies and low pressure drops. [211] Hierarchical structures on cellular and granular-based air filters are also commonly achieved by etching, coating, and fiber growth on the surface. This significantly increases filtration performance, but only cause a minor increase in pressure drop.…”

Section: Structural Optimizationmentioning

confidence: 99%

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Henning

Abdullayev

Vakifahmetoğlu

et al. 2021

Adv Energy and Sustain Res

View full text Add to dashboard Cite

Particulate and gaseous air pollutants pose a threat to human health and contribute to climate change. By today, air filters, stationary and portable, are markedly improved and can often provide innocuous air pollution levels. After introducing the classification and standards on air filters, the influence of the processing route and its parameters on the resulting air filter properties and consequently its performance are discussed. Numerous tools are presented to adjust structural properties such as fiber or pore diameter, specific surface area, surface charge, hydrophilicity, or photocatalytic activity to achieve the desired performance in terms of high filtration efficiencies, sufficient mechanical stability, regeneration eligibility, antimicrobial and optical properties. In particular, inorganic and composite materials as well as nonfibrous structures are covered, which are currently holding an outsider position in an air filter community dominated by polymeric materials and fibrous structures.

show abstract

Section: Structural Optimizationmentioning

confidence: 99%

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Henning

Abdullayev

Vakifahmetoğlu

et al. 2021

Adv Energy and Sustain Res

View full text Add to dashboard Cite

show abstract

“…The rate of the increase is initially quite high, but reduces with time. The rapid increase of the filtration efficiency mainly occurs during the penetration and transition periods [20]. This is because the dust particles penetrate deeply into the filtering layer during these periods, with small amounts of dust deposited on the surface of the filtering layer.…”

Section: Effect Of Temperature On the Filtration Efficiency Of The Upmentioning

confidence: 99%

“…A dual-layer granular bed filter thus achieves fine and coarse filtrations within a single system. In the experiments performed by Tian et al [20,21], the duallayer granular bed filter achieved a stable average outlet dust concentration of 3-7.5 mg m -3 and pressure drop of 2010-2040 Pa, based on an initial filtration velocity of 0.25 m s -1 and inlet dust concentration of 3.89-23.34 g m -3 . This shows that a dual-layer granular bed filter is capable of simultaneously achieving a high filtration efficiency and low pressure drop.…”

Section: Introductionmentioning

confidence: 98%

Effects of Temperature on the Filtration Characteristics of a Dual‐Layer Granular Bed Filter

et al. 2018

Self Cite

View full text Add to dashboard Cite

The effects of temperature on the filtration efficiency and pressure drop of a duallayer granular bed filter were investigated in a hot dual-layer granular bed filter with experimental dust. Enhanced higher filtration efficiency was obtained with higher filtration temperature, and the removal efficiency of ultrafine dust was also at a high level. Simultaneously, the total pressure drop maintained at an acceptable range. The results demonstrate that the dual-layer granular bed has excellent prospects for application to low-temperature coal pyrolysis.

show abstract

“…Combining different granules in terms of particle deposition efficiency and pressure drop allows us to achieve better efficiency than the use of only one type of granules [22][23][24]. The authors of experimental work [25] substantiated the expediency of the use of a multilayer granular filter, which reduces the pressure drop by almost 50% while increasing the particle deposition efficiency by 3.23%.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Aerosol Particle Motion in Granular Filters with Solid and Porous Granules

2021

View full text Add to dashboard Cite

In this work, a study was carried out to compare the filtering and hydrodynamic properties of granular filters with solid spherical granules and spherical granules with modifications in the form of micropores. We used the discrete element method (DEM) to construct the geometry of the filters. Models of granular filters with spherical granules with diameters of 3, 4, and 5 mm, and with porosity values of 0.439, 0.466, and 0.477, respectively, were created. The results of the numerical simulation are in good agreement with the experimental data of other authors. We created models of granular filters containing micropores with different porosity values (0.158–0.366) in order to study the micropores’ effect on the aerosol motion. The study showed that micropores contribute to a decrease in hydrodynamic resistance and an increase in particle deposition efficiency. There is also a maximum limiting value of the granule microporosity for a given aerosol particle diameter when a further increase in microporosity leads to a decrease in the deposition efficiency.

show abstract

Cascade filtration properties of a dual-layer granular bed filter

Cited by 42 publications

References 20 publications

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Effects of Temperature on the Filtration Characteristics of a Dual‐Layer Granular Bed Filter

Numerical Simulation of the Aerosol Particle Motion in Granular Filters with Solid and Porous Granules

Contact Info

Product

Resources

About