Evaluation of cyclone performance in different gases

Lee, K.W.; Gieseke, J.A.; Piispanen, W.

doi:10.1016/0004-6981(85)90229-x

Cited by 16 publications

(3 citation statements)

References 6 publications

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“…This kind of cyclone (shown in Figure 1a) is a typical reversed ow or cone-under-cylinde r design. The performance of the high efciency Stairmand cyclone has been studied extensively through both laboratory and eld works (Dietz 1981;Boysan et al 1982;Dirgo and Leith 1985;Lee et al 1985;Iozia and Leith 1989;Li and Wang 1989;Iozia and Leith 1990;Kim and Lee 1990;Coker 1993;Liden and Gudmundsson 1997;Zhu and Lee 1999). Several other cyclone designs have been evaluated by comparing their performance with that of the high ef ciency Stairmand cyclone (Razgaitis and Gusenther 1981; Jaroszczyk and Ptak 1985;Moore and McFarland 1990).…”

Section: High Ef Ciency Stairmand Cyclonementioning

confidence: 99%

“…Since cyclones have been used extensively in industry, both theoretical and experimental studies on cyclones were carried out from the early 1940s to the present (Stairmand 1951;Dietz 1981;Boysan et al 1982;Dirgo and Leith 1985;Lee et al 1985;Iozia and Leith 1989;Li and Wang 1989;Iozia and Leith 1990;Kim and Lee 1990;Coker 1993;Liden and Gudmundsson 1997;Zhu and Lee 1999). Although our knowledge of ow and particle capture mechanisms operating inside a cyclone has increased over the years, the exact mechanisms of removing particles are still not fully understood.…”

Section: Introductionmentioning

confidence: 99%

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Design and Performance Evaluation of a Novel Double Cyclone

Y.¹,

Kim²,

Lee³

et al. 2001

Aerosol Science and Technology

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A novel cyclone design, named double cyclone, adds an extra cylinder wall into a conventional reversed ow cyclone. The physical performance of the double cyclone has been experimentally compared to a widely used conventional cyclone by measuring the particle concentrations both upstream and downstream of each cyclone with an Aerosizer. Tests with monodisperse polystyrene latex (PSL) particles with diameters ranging from 0.60 ¹m to 8.8 ¹m have shown that the double cyclone provides higher collection efciency than the conventional cyclone for a tested ow rate range of 10-40 L/min. In addition, the collection ef ciency difference between the double cyclone and the conventional cyclone becomes even larger as the air ow rate increases. Sharper particle-size separation characteristics were also observed for the double cyclone. Furthermore, it was found that the double cyclone operates at a lower pressure drop than the conventional cyclone at the same normalized cut size.

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Section: High Ef Ciency Stairmand Cyclonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Performance Evaluation of a Novel Double Cyclone

Y.¹,

Kim²,

Lee³

et al. 2001

Aerosol Science and Technology

View full text Add to dashboard Cite

show abstract

“…Furthermore, the boiler operational conditions as well as the black liquor properties were simultaneously recorded. The particles were extracted from the flue gas with a quench probe or a dilution system and collected on quartz filters, size classified with a Berner-type low-pressure impactor down to 0.01 μm particle diameter and with a three-stage cyclone system . Samples were collected on copper grids or on planar filters for electron microscope analyses.…”

Section: Introductionmentioning

confidence: 99%

Alkali Salt Ash Formation in Four Finnish Industrial Recovery Boilers

et al. 1999

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Combustion aerosol measurement methods were introduced and applied for extensive ash formation studies at four operating recovery boilers in Finland. Ash particle mass size distributions determined with a Berner-type low-pressure impactor downstream the heat exchangers were clearly bimodal with the fine mode at about 2 µm and the coarse mode above 3 µm aerodynamic diameter. According to SEM images, fine ash mode consists of individual, almost spherical 0.3-0.7 µm alkali salt particles and of agglomerates with few primary particles of similar diameter and shape. The degree of fine mode primary particle sintering increased when increasing boiler heat load. Coarse mode includes large agglomerates with up to thousands of 0.3-0.7 µm alkali salt primary particles and spherical silica particles. Ash particle main component was sodium sulfate as determined with X-ray diffraction. Sodium-to-sulfur molar ratio of ash particles calculated on the analyses results with an ion chromatography decreased from the upper furnace sampling point to electrostatic precipitator inlet conditions, indicating sulfation of ash particles within the heat exchanger section. Chlorine in ash was bound as sodium chloride, no potassium chloride was detected with X-ray absorption fine structure spectroscopy. Furnace measurements showed that fine mode ash particles are formed already in the furnace via vapor condensation. The extents of release of 12% for Na, 24% for S, and 48% for Cl were determined on the basis of ion concentrations in fine particles and the mass balance calculation on the recovery boiler. Coarse particles observed downstream the heat exchangers are proposed to form mainly via entrainment of large agglomerates of fine ash particles deposited on the heat exchangers. The fine mode particle size was insensitive to the furnace conditions although the particle concentration increased when the furnace gas temperature increased. This and the increase of Na/S molar ratio in the particles indicates that Na volatilization increases with the increasing furnace temperature, whereas S release is less sensitive to the temperature increase.

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A comprehensive review of cyclone separator technology

Aylı,

Kocak

2024

Can J Chem Eng

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This review article examines the working principles, optimal dimensions, effects of key parameters, and the results of experimental/numerical studies on cyclone separators. Investigations have been conducted on the effects of parameters such as vortex finder diameter, conical part diameter, cyclone separator diameter, cylinder height, inlet height, inlet width, vortex finder length, and cyclone total length on efficiency, performance, and pressure drop. Furthermore, the article explores current modifications and efforts to improve efficiency. These modifications include adding water nozzles, inserting ribs, employing double‐stage cyclones, incorporating additional inlets, using finned cylinder bodies, adding extra top inlets, introducing liquid jets, employing helical roof inlets, adding laminarizers, incorporating internal spiral vanes, and employing slotted vortex finders. While serving as a guide to optimize the design and performance of cyclone separators, this article emphasizes new and innovative approaches to enhance their industrial applicability. By compiling studies conducted from conceptual birth to the present, the aim of this article is to serve as a guidebook.

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Evaluation of cyclone performance in different gases

Cited by 16 publications

References 6 publications

Design and Performance Evaluation of a Novel Double Cyclone

Design and Performance Evaluation of a Novel Double Cyclone

Alkali Salt Ash Formation in Four Finnish Industrial Recovery Boilers

A comprehensive review of cyclone separator technology

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