A new cyclone design with adjustable inlet angle and external geometry for optimal PM10 removal

Jebeli, Maryam Borhani; Moridi, Parvin; Beheshti, Mohammad Taghi Hamidi; Yarahmadi, Rasoul

doi:10.1007/s13762-019-02422-3

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…The flow pattern can be seen to be very similar to that in the single-inlet cyclone, and the particle path confirms the presence of the 'end of the vortex' in the separation space, causing a disturbance in the particle transport to the particle outlet. Lately increasing interest has been paid to the option of angling the cyclone inlet downwards with the aim of enhancing the downward flow in the outer part of the vortex and stabilise the vortex flow in the cyclone separation space and also to reduce the lip-leakage flow shortcircuiting the cyclone [26,52]. In order to add an unbiased assessment of the merits of such a design modification to the published literature, some simulations were performed with this configuration.…”

Section: Effect Of a Modified Inletmentioning

confidence: 99%

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Hoffmann,

Fonnes,

Chang

2023

J. Phys.: Conf. Ser.

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This paper reports a detailed study of the flow in cyclone separators, with the use of most up to date computational fluid dynamics simulations, which are validated with positron emission particle tracking (PEPT) experiments tracing the movement of particles through the cyclone. The parameters varied were the viscosity of the carrier liquid, the flowrate and, in the numerical simulations, the inlet configurations of the cyclone, namely one and two inlets and, with the two inlets, a) both at right angles to the cyclone axis and b) angled downwards. The study reveals features of the flow, which have not been seen till now, but are necessary for the understanding and modelling of the separation and purification efficiency of cyclones. The results of the simulations and the close agreement with experiment are a testament to the reliability and accuracy of large eddy simulation (LES), even for flow features as difficult to simulate as the confined strongly swirling flows in cyclone separators. The results show that a contiguous, smooth surface of zero axial velocity does exist and has approximately the shape that has been assumed by modellers. The significant effects of fluid viscosity, underflow and modifications to the inlet are also shown.

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Section: Effect Of a Modified Inletmentioning

confidence: 99%

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Hoffmann,

Fonnes,

Chang

2023

J. Phys.: Conf. Ser.

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“…As abatement particulate emission devices, cyclone separators have experienced rapid improvements in terms of geometrical modifications using numerical and experimental investigations for efficient particle separation performance since the early days of Shepherd and Lapple (who conducted the first scientific cyclone study) in 1939. Because of their particle separation capabilities, low cost, simplicity of construction, high efficiency, low maintenance, and adaptability to high-temperature-pressure operating conditions, many researchers prefer to use cyclone separators in various settings for particle classification [5], aerosol sampling [7], pressure fluidization, flue recycling, and the heterogeneous removal of particulate matter (PM10) [8]. The geometric layout of a typical cyclone separator comprises a tangential inlet (through which the dust-gas enters the cyclone), cylinder-on-cone compartment (where the particles spiral downward), hopper (where the particles collect at the bottom into a dust collector), and vortex finder (which permits the centrifugal upward reversal of the clean gas to exit the cyclone), as illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…A novel cyclone separator has been reported for separating fine particles at low velocities. Jebeli et al [8] optimized the removal efficiency of particulate matter (PM10) using a newly designed cyclone separator with adjustable vortex finder height and inlet angle.…”

Section: Introductionmentioning

confidence: 99%

Bibliometric Network Analysis of Trends in Cyclone Separator Research: Research Gaps and Future Direction

Alex

Tan²,

Agyeman³

et al. 2022

Sustainability

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Cyclone separators are used extensively in diverse applications and research domains to collect particle-laden flows. Despite the technological advances in this field, no bibliometric reports on this topic have been documented. Understanding the state of the art in this field is crucial for future research. Using bibliometric mapping techniques, this study examined the quality, quantity, and development of research on cyclone separators. Relevant data were extracted in plain text formats through search queries refined by publication year (2000–2021) and document type (article and review articles). A sample of 487 publications, limited to the Web of Science Core Collection (WoSCC) database was used for the bibliometric analysis. Data analysis was performed using RStudio software package (R Bibliometrix tool). Of the 487 publications that appeared during this period, China had the highest number, followed by the Islamic Republic of Iran, whereas chemical engineering journals dominated the cyclone separator research publications. Collaboration among the researchers was low (MCPR < 0.5000). Furthermore, the pattern of single-author publications was found to outstrip that of the multiple-author publications. The findings suggest that researchers in various parts of the world, particularly Africa and the Middle East, should route their research efforts towards this field, in light of the lack of publications from these regions on this subject. The aim of this study was to serve as a seminal reference for potential technological research directions and collaboration among researchers in this and other related fields.

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Creation and research of numerical models of cyclones with inclined and horizontal inlets

Gorbunov,

Ziganshin

2024

Nadežn. bezop. ènerg.

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The article considers the challenges of using cyclone devices for cleaning gas emissions from solid fuel combustion in power engineering and industry. With the increasing energy consumption and generation, including the use of coal, the requirements for the efficiency of cleaning emissions from small solid particles of classes PM10 and PM2.5 are also rising. One of the key tasks is to maintain high cleaning efficiency while minimizing energy costs, which is also important for reducing the environmental impact of generation and industrial production. The article considers the design features of currently used cyclones, as well as existing approaches to their classification. The main focus is on modern areas of research related to numerical modeling based on CFD (Computational fluid dynamics) aimed at optimizing the design of separators. It is shown that most studies are carried out for cyclone operating conditions in production cycles, rather than in emission cleaning systems that operate at low suspended matter loads. Using the example of creating numerical models of cyclones with inclined and horizontal inlet pipes (CN-11, SK-CN-34), the article discusses certain features of geometry creation in the SpaceClaim Direct Modeler (SCDM) environment, which ensure the correctness of grid generation and calculations in the future. The results of numerical modeling carried out using the ANSYS Fluent software are presented. The turbulence model (RANS, Reynolds Averaged Navier – Stokes), methods for closing the Navier – Stokes equations (k-ε model with near-wall functions), and methods for calculating the dispersed part of the flow (Euler – Lagrange, DPM) are selected based on the conditions relevant to the systems for cleaning emissions from coal generation. The results indicate that, with the same pressure drop, the efficiency of settling suspended matter with a concentration of 100 mg/m3 or less in an apparatus with an inlet angle of 11° to the horizontal can be higher than that of a cyclone with a horizontal inlet.

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A new cyclone design with adjustable inlet angle and external geometry for optimal PM10 removal

Cited by 3 publications

References 40 publications

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Flowpattern in hydrocyclones, numerical simulations with experimental verification

Bibliometric Network Analysis of Trends in Cyclone Separator Research: Research Gaps and Future Direction

Creation and research of numerical models of cyclones with inclined and horizontal inlets

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