Experimental study of cyclone performance for blow-by gas cleaning applications

Sagot, Benoît; Forthomme, A.; Yahia, Lyes Ait Ali; Bourdonnaye, Guillaume de La

doi:10.1016/j.jaerosci.2017.05.009

Cited by 16 publications

(5 citation statements)

References 22 publications

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“…The results suggest that increasing flowrate has a positive effect on the particle removal efficiency of the cyclone, while increasing cyclone diameter has a negative effect on the particle removal efficiency of the cyclone. Similar results were found by (Sagot et al, 2017). An increase of the particle removal efficiency with the increase of the flow rate was attributed to the stronger centrifugal force created by the higher flowrates.…”

Section: Comparison Of Cyclone Removal Efficiency Based On Respiratorsupporting

confidence: 86%

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Particulate emission from the gasification and pyrolysis of biomass: Concentration, size distributions, respiratory deposition-based control measure evaluation

Yao

You

Dai

et al. 2018

Environmental Pollution

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Gasification and pyrolysis technologies have been widely employed to produce fuels and chemicals from solid wastes. Rare studies have been conducted to compare the particulate emissions from gasification and pyrolysis, and relevant inhalation exposure assessment is still lacking. In this work, we characterized the particles emitted from the gasification and pyrolysis experiments under different temperatures (500, 600, and 700 °C). The collection efficiencies of existing cyclones were compared based on particle respiratory deposition. Sensitivity analysis was conducted to identify the most effective design parameters. The particles emitted from both gasification and pyrolysis process are mainly in the size range 0.25-1.0 μm and 1.0-2.5 μm. Particle respiratory deposition modelling showed that most particles penetrate deeply into the last stage of the respiratory system. At the nasal breathing mode, particles with sizes ranging from 0.25 to 1.0 μm account for around 91%, 74%, 76%, 90%, 84%, and 79% of the total number of particles that deposit onto the last stage in the cases of 500 °C gasification, 600 °C gasification, 700 °C gasification, 500 °C pyrolysis, 600 °C pyrolysis, and 700 °C pyrolysis, respectively. At the oral breathing mode, particles with sizes ranging from 0.25 to 1.0 μm account for around 92%, 77%, 79%, 91%, 86%, and 81% of the total number of particles that deposit onto the last stage in the six cases, respectively. Sensitivity analysis showed that the particle removal efficiency was found to be most sensitive to the cyclone vortex finder diameter (D). This work could potentially serve as the basis for proposing health protective measures against the particulate pollution from gasification and pyrolysis technologies.

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Section: Comparison Of Cyclone Removal Efficiency Based On Respiratorsupporting

confidence: 86%

“…C-20, C-25, C-30, C-35, C-40, and C-45) were compared in terms of their effects on mitigating particle respiratory deposition. The corresponding design parameters of the cyclones are shown in Figure 2 (Sagot et al, 2017). A case without cyclone was also considered for the purpose of comparison.…”

Section: Respiratory Deposition Modellingmentioning

confidence: 99%

Particulate emission from the gasification and pyrolysis of biomass: Concentration, size distributions, respiratory deposition-based control measure evaluation

Yao

You

Dai

et al. 2018

Environmental Pollution

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“…2). The cyclone was sized using the scaling software developed by B. Sagot and based on its work on compact cyclone published by his team (Sagot et al, 2017). The cyclone calculation is realized with a barrel diameter, D, equal…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Design of an Inhalation Chamber and Metrology Assessment to Study Tungsten Aerosol Neurotoxic Effects

Macé

Ibanez

Gélain

et al. 2021

Aerosol Air Qual. Res.

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In order to study the impact of exposure to tungsten aerosol on brain toxicity, we designed a strategy to control the generation of tungsten aerosol with mass concentrations within the magnitude of the average occupational exposure limit value (5 to 10 mg.m-3).Due to such extreme density of tungsten particles, the challenge was to perform relevant measurements of aerosol characteristics needed for upper airways and lung deposition calculations. We mixed tungsten bead powder of coarse diameter with the powder of interest in well-defined mass proportions. We used a cyclone at the exit of a RBG 1000 generator (PALAS) to remove the coarse particles from the aerosol of interest. Measurements of aerosols produced in the inhalation chamber were carried out using several instruments paired with sample lines arranged symmetrically: a low pressure impactor DLPI-30 lpm Dekati® with a basic sampling on filter holder; a DLPI with an APS (Aerodynamic Particle Sizer) 3321 TSI® ; an EEPS (Engine Exhaust Particle Sizer) 3090 TSI® with an APS. The DLPI and the filter holder always provided very close measurements in terms of mass concentrations. The mass median aerodynamic diameter (Da) was 1.77 and 1.89 µm as determined by the DLPI and the APS with the Stokes correction, respectively. The count median diameter in electrical mobility determined by EEPS was 0.17 µm. The results obtained show very good agreement between the measurements carried out with the DLPI, APS and EEPS. The methodology developed for the analysis of the EEPS results confirms that the measurements of the electrical mobility diameter made with this instrument is within a range of aerodynamic sizes never explored and for which the instrument was not initially designed. CFD simulations of the airflows and aerosol dispersion in the chamber allowed to ensure that the aerosol inhaled by the animals is homogeneous and representative.

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“…Uncollected during the purification process, the finely dispersed particles at the industrial enterprises cause the failure of devices due to clogging with various type of dirt, formed by the accumulation of dust [1][2][3][4]. Also, uncollected finely dispersed particles often cause a decrease in the properties of devices, an increase in the hydraulic resistance of pipelines and lead to explosive and fire-hazardous situations [5][6][7][8][9]. For example, at the gas distribution stations, the finely dispersed particles, when getting into the process and gas-regulating equipment, impair operation of them.…”

Section: Introductionmentioning

confidence: 99%

The gas flow dynamics in a separator with coaxially arranged pipes

et al. 2020

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In order to increase the efficiency of gas purification from the particles of up to 20 microns and to increase the service life of bag and electrostatic filters, the authors propose to use a centrifugal separation device with coaxially arranged pipes to be installed before the fine purification devices. The numerical studies of gas dynamics in a separation device were conducted in ANSYS Fluent software package. As a result of conducted numerical studies, it was found that the pressure loss in the centrifugal separation device is not more than 70 Pa at the inlet gas flow rate from 1 to 15 m/s and the width of rectangular hole within the range from 10 to 15 mm. The low pressure losses are caused by the design features; in particular, the resulting vortices in the inter-cylindrical space practically do not contact the wall surfaces of device. The equations of pressure loss depending on the width of rectangular holes and the hydraulic resistance coefficient of separation device depending on the inlet gas flow rate were obtained. The design coefficient of hydraulic resistance of separation device was equal to 0.45.

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Experimental study of cyclone performance for blow-by gas cleaning applications

Cited by 16 publications

References 22 publications

Particulate emission from the gasification and pyrolysis of biomass: Concentration, size distributions, respiratory deposition-based control measure evaluation

Particulate emission from the gasification and pyrolysis of biomass: Concentration, size distributions, respiratory deposition-based control measure evaluation

Design of an Inhalation Chamber and Metrology Assessment to Study Tungsten Aerosol Neurotoxic Effects

The gas flow dynamics in a separator with coaxially arranged pipes

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