Hybrid air filters: A review of the main equipment configurations and results

Castro, Bruno José Chiaramonte de; Sartim, Rafael; Guerra, Vádila Giovana; Aguiar, Mônica Lopes

doi:10.1016/j.psep.2020.07.025

Cited by 25 publications

(4 citation statements)

References 45 publications

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“…By comparison, collection efficiencies in the electrostatic zone of the recent hybrid filters that integrate an ESP and bug filter are 46-87, 48-90, and 50-97% for d p = 0.5, 1.0, and 2.0 µm, respectively [32]. The magnetic fluid filter with NTP, thus, exhibits equivalent or superior performance to hybrid filters.…”

Section: Pm Collection In a Magnetic Fluid Filtermentioning

confidence: 99%

Air Purification Performance Analysis of Magnetic Fluid Filter with AC Non-Thermal Plasma Discharge

Kuwahara,

Asaka

2024

Energies

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Air pollution caused by particulate matter (PM) is a worldwide concern. PM is particularly problematic from fossil-fuel-based energy conversion devices. For PM collection, a low-pressure loss method is ideal. Although PM collection via electrostatic force is an effective method with low pressure loss for PM with a wide range of diameters, it is difficult to apply to low-resistive PM, such as diesel particulates, owing to re-entrainment on the collection electrode. A magnetic fluid filter with an AC non-thermal plasma discharge solves the problem of re-entrainment. Based on our previous study, we hypothesized that an increase in the number of magnetic fluid spikes leads to an improvement in collection efficiencies with energy conservation. In this study, experiments are performed to verify this hypothesis. By improving our previous experimental methodology, the experiments include not only collection efficiency but also pressure loss, power consumption, and ozone generation efficiency. PM collection efficiencies using diesel fine particles and the ozone generation efficiencies required for air purification are investigated under different discharge conditions. The results revealed that the PM collection and ozone generation efficiencies increase proportionally with the number of spikes of the magnetic fluid with discharge, as hypothesized. The resulting PM collection and ozone generation efficiencies are sufficiently high for air purification.

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Section: Pm Collection In a Magnetic Fluid Filtermentioning

confidence: 99%

Air Purification Performance Analysis of Magnetic Fluid Filter with AC Non-Thermal Plasma Discharge

Kuwahara,

Asaka

2024

Energies

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“…In order to increase the collection efficiency of hybrid systems, the processes of particle charging filtration by a bag filter were combined [5]. Three types of hybrid electrostatic filtration systems, using electrostatic phenomena to support filtration processes, have been developed and reviewed in [6][7][8][9]. Single-line diagrams of these systems are drawn in Figure 1.…”

Section: Hybrid Filtration Backgroundmentioning

confidence: 99%

Hybrid electrostatic filtration systems for exhaust gas cleaning

Jaworek,

Sobczyk,

Marchewicz

et al. 2024

J. Phys.: Conf. Ser.

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Emission of submicron and nanoparticles by industrial processes, like coal or biomass combustion, solid waste incineration, cement kiln heating, and glass production is a serious environmental problem. The application of most effective bag filters is limited due to very high temperature of the exhaust gases from most of these processes, sometimes >1000 K, which the filter material cannot resists. Cyclones, which could be resistant to these temperatures, are not effective for PM2.5 particles removal, which are the most abundant in these processes. Electrostatic precipitators remove dust from flue gases with high mass collection efficiency, but in submicron range (~100 nm to 1 μm) the so called “penetration window” occurs, in which the fractional collection efficiency decreases even below 50% at minimum. Hybrid electrostatic filtration systems, which combines various conventional gas-cleaning devices were therefore proposed and tested in several research papers, in order to improve the overall collection efficiency of the precipitation processes. The heart in all of these devices is an electrostatic particle charger, which can be a conventional electrostatic precipitator, a corona-discharge particle precharger, or electrostatic particle agglomerator. After charging and/or agglomeration, the particles can be further removed by other devices like cyclones, electrostatic precipitators, or bag filters (after gas cooling to an allowable temperature). The paper reviews specific problems encountered in exhaust gas cleaning from various industrial processes, and the most interesting constructions designed for this goal. In particular, an example of a system comprising a unipolar electrostatic agglomerator, which simultaneously charges the particles and agglomerates them in alternating electric field, for the formation of aggregates of finer particles (PM1) with larger species, which could be removed by any conventional gas cleaning device, with sufficiently high collection efficiency, has been discussed in details.

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“…Journal of Physics: Conference Series 2599 (2023) 012046 IOP Publishing doi:10.1088/1742-6596/2599/1/012046 2 PM purification, which captures PM from air, is capable of effectively countering the malign influence of PM, particularly at high concentrations. Electrostatic precipitators and bag filters are widely used to separate PM from gas streams, and bag filters are more effective dry technologies for particle removal than electrostatic precipitators [4]. However, the removal efficiency decrease usually after the dust collectors are used for a long time, and whether they meet the requirements of the emission limit in relevant standards is unknown.…”

Section: Fmia-2023mentioning

confidence: 99%

Study on the performance of the dust removal efficiency test device

Zou,

Wu,

Huang

et al. 2023

J. Phys.: Conf. Ser.

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In China, the particulate matter (PM) pollution has caused serious environmental and health concerns, and it is still a huge challenge to control PM pollution. In order to alleviate the hazardous of PM pollution, the dust collector is widely used to separate PM from gas streams. However, after a period of operating, whether the removal efficiency of the dust collector still meet the requirement of the emission limit is unknown. The dust removal efficiency test device was designed and its performance was investigated in this study. The flow field simulation result showed that the test device had a good uniformity, which was consistent with previous measured result. Moreover, it found that the linear relationship between the light scattering concentration and the filtration membrane weighed concentration was y=2.285x, and when the inlet wind speed was about 0.5 m/s, the dust removal efficiency of the dust collector was more than 99.73%, the outlet dust concentration was (0.03-0.04) mg/m3, which was below the emission limit of 15 mg/m3. When the inlet dust concentration was about 200 mg/m3 and the inlet wind speed was (0.25-0.75) m/s, the dust removal efficiency was more than 99.98%. To sum up, the designed test device can be used to estimate the dust removal efficiency of various types of dust collectors.

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Hybrid air filters: A review of the main equipment configurations and results

Cited by 25 publications

References 45 publications

Air Purification Performance Analysis of Magnetic Fluid Filter with AC Non-Thermal Plasma Discharge

Air Purification Performance Analysis of Magnetic Fluid Filter with AC Non-Thermal Plasma Discharge

Hybrid electrostatic filtration systems for exhaust gas cleaning

Study on the performance of the dust removal efficiency test device

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