Removal of fine solid particles in aggressive gas flows in a newly designed multi-channel cyclone

Baltrėnas, Pranas; Chlebnikovas, Aleksandras

doi:10.1016/j.powtec.2019.08.018

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…Based on the research performed by the authors [21], optimal parameters for the computational grid and viscosity model were established thus analysing gas flow processes in the multi-channel cyclone having one installed inlet. With reference to the findings of the study, numerical simulation was extended applying the geometry of the advanced multi-channel cyclone.…”

Section: The Analysed Results Of the Research On The Numerical Simulation Of Particulate Matter And Gas Flow Processesmentioning

confidence: 99%

“…The medium-accuracy computational grid was selected for the advanced multi-channel cyclone model. The latter case was identified as the most appropriate with reference to the study on the geometry of the multichannel cyclone [21]. The length of the advanced model for the multi-channel cyclone in different axial directions is as follows: x -1,600 mm; y -1,600 mm; z -3,400 mm (Fig.…”

Section: Processesmentioning

confidence: 99%

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Investigation on particulate matter and gas motion processes in the advanced multi-channel cyclone-separator with secondary gas inlets

Baltrėnas

Crivellini

Leonavičienė

et al. 2021

Environmental Engineering Research

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Research into gas flow motion as a transported phase and pollutant – particulate matter (PM) is of crucial importance, their changes in particular areas of the object require knowledge of improving the apparatus. A cyclone is considered one of the most popular devices due to the new modified multi-channel design that involves combined separation and filtration phenomena. The findings of an accurate numerical model provide an opportunity to verify long-term experimental studies. In addition, it is possible to determine the impact of the designed principal elements of the structure comprising secondary gas inlets, inner slits and the convex bottom on gas and PM motion through verification conducting experimental research. The study focuses on simulating the upgraded cyclone using the SST k-omega model. The research has been conducted under the specified gas flow conditions such as high temperature and relative humidity (aggressive) gas and presents the results of the physical model to compare with. To achieve greater computational accuracy, a digital model of the cyclone made of specific volumetric elements has been developed thus expanding the grid and stepping to form the boundary zone. As a result, numerical simulation results differ by no more than 12.8% compared to the experimental studies results.

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Section: The Analysed Results Of the Research On The Numerical Simulation Of Particulate Matter And Gas Flow Processesmentioning

confidence: 99%

Section: Processesmentioning

confidence: 99%

Investigation on particulate matter and gas motion processes in the advanced multi-channel cyclone-separator with secondary gas inlets

Baltrėnas

Crivellini

Leonavičienė

et al. 2021

Environmental Engineering Research

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“…During the experimental trials, PM (particulate matter) concentration and smoke (gas) composition inside the air duct system were examined. Concentration of wood ash was 5 g/m 3 . Properties of the wood ash: bulk density-710 kg/m 3 ; overall density-800-900 kg/m 3 .…”

Section: Experimental Setup 221 Creation Of a Smoke (Gas) And Particu...mentioning

confidence: 99%

“…They are among the cheapest air purification devices, but their principal disadvantage is their low particulate matter (less than 10 µm in diameter) removal rate, which is especially obvious when strict requirements for the discharge of hazardous particles have to be met [1]. However, by improving the cyclone's structure, the isolation of finely divided particles up of to 10 µm in diameter becomes possible [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

et al. 2022

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Cyclones are widely used for separating particles from gas in energy production objects. The efficiency of conventional centrifugal air cleaning devices ranges from 85 to 90%, but the weakness of many cyclones is the low collection efficiency of particles less than 10 μm in diameter. The novelty of this work is the research of the channel-type treatment device, with few levels adapted for precipitation of fine particulate matter, acting by a centrifugal and filtration principle. Many factors have an impact on cyclone efficiency—humidity, temperature, gas (air) composition, airflow velocity and etc. Many scientists evaluated only the effect of origin and size of PM on cyclone efficiency. The effect of gas (air) composition and temperature, and humidity on the multi-channel cyclone-separator efficiency still demands contributions. Complex theoretical and experimental research on air flow parameters and the efficiency of a cylindrical eight-channel system with adjustable half-rings for removing fine-dispersive particles (<20 μm) was carried out. The impact of air humidity and temperature on air flow, and gaseous smoke components on the removal of wood ashes was analyzed. The dusty gas flow was regulated. During the experiment, the average velocity of the cyclone was 16 m/s, and the temperature was 20–50 °C. The current paper presents experimental research results of wood ash removal in an eight-channel cyclone and theoretical methodology for the calculation of airflow parameters and cyclone effectiveness.

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“…Traditional cyclones are limited to the size of the separation chamber, which changes due to the efficiency of the air being cleaned. Investigations have been performed analyzing the orientation of the inflow opening, the number of inflows, and their geometry and size [29][30][31][32]. This analysis is also possible in multichannel cyclones, but additional purification can be controlled by changing the arrangement of the channels and the shape of the channel-forming elements-research in this area is being conducted [32].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

et al. 2022

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The variation in the two-phase flow parameters in a cylindrical body of new geometry and principle of operation are considered for a device for separating solids from air flow, solving the problem of numerical flow modeling. The aim of this research was to analyze the changes in the parameters of a multi-channel cylindrical cyclone in a mathematical model and to compare it with the results of the examined physical model. Studies on the numerical modeling of cyclones are reviewed, and models and equations for complex vortex flow description are applied. Differential equations were numerically solved by the finite volume method using the standard turbulence models of k‒ε and RNG k‒ε. Numerical modeling of the velocities, pressures, and volumes of both phases of the two-phase flow was performed. The simulation of the volume distribution of the second phase (glass particles) in the cyclone structure at flow rates of 10.9 m/s, 13.9 m/s, and 21.9 m/s was performed. The values obtained were compared with the physical model of the cyclone in question. The mean relative error was ± 6.9%.

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Removal of fine solid particles in aggressive gas flows in a newly designed multi-channel cyclone

Cited by 19 publications

References 24 publications

Investigation on particulate matter and gas motion processes in the advanced multi-channel cyclone-separator with secondary gas inlets

Investigation on particulate matter and gas motion processes in the advanced multi-channel cyclone-separator with secondary gas inlets

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

Modeling of Two-Phase Flow Parameters of a Multi-Channel Cylindrical Cyclone

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