Experimental investigations on a cyclone separator performance at an extremely low particle concentration

Ji, Zhongli; Xiong, Zhang; Wu, Xiaoyin; Chen, Honghai; Wu, Hailing

doi:10.1016/j.powtec.2008.10.015

Cited by 65 publications

(29 citation statements)

References 11 publications

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“…Rising solid loading rate from 4.98g/m 3 to 130.8g/m 3 at three different inlet velocity conditions, noticed a dramatic increment of overall collection efficiency at low velocity conditions [11], [12]. Considering extremely low particle loading rates, from 5mg to 20000mg, overall and grade efficiency curves were studied by [8], for small scale cyclone separators and observed a similar increment behavior for low to high inlet velocity conditions. In addition, this study indicated that at low solid loading conditions, particle agglomeration is significant in particle separation.…”

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confidence: 75%

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Experimental Study of Particle Collection Efficiency of Cylindrical Inlet Type Cyclone Separator

Sakura¹,

Leung²

2015

IJESD

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Abstract-The performance of collection efficiency of cylindrical inlet-type cyclone separator for relatively low solid loading rate conditions is reported. Cyclone separators usually operate under high solid loading conditions, but the demand of air pollution control at outdoor densely polluting activities as construction sites and application of power generators, it is advantageous to use cyclone separators to control outdoor air pollution by cyclone separators. Grade efficiencies and overall collection efficiencies have been investigated from 0.008g/m 3 to 0.2g/m 3 solid loading rates at 5m/s and 10m/s inlet velocity conditions. Experimental data were compared with two theoretical predictions based on empirical and mechanistic relationships, developed by Smolik and Muschelknautz. To achieve a better understanding of particle separation efficiency, particle cut size diameter for selected loading rate were considered with theoretical approached by Muschelknautz model. Both experimental and theoretical results showed that with the increase of solid loading rate and inlet velocity, the particle collection efficiency of cyclone separator increases.Index Terms-Cut size diameter, cyclone separator, grade efficiency, solid loading rate, swirling flow, overall collection efficiency.

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confidence: 75%

“…But a survey of experimental results from literature considering a loading range of 2.3 to 228.8g/m 3 , has showed a increase of collection efficiency with the increase of solid loading rate [7] (as reported by [8]). For coarse range particle application is observed the same behavior for particle loading rate up to 100g/m 3 [9].…”

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confidence: 99%

Experimental Study of Particle Collection Efficiency of Cylindrical Inlet Type Cyclone Separator

Sakura¹,

Leung²

2015

IJESD

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“…Many scholars used experimental and numerical simulation method to study on the separation performance of single cyclone separators (Molerus and Glückler, 1996;Fassani and Leonardo, 2000;Yoshida et al, 2001;Su and Mao, 2006;Wan et al, 2008;Ji et al, 2009;Hsiao et al, 2011;Su et al, 2011;Karagoz et al, 2013;and so on). Moreover, some other scholars researched the parallel operation of cyclone separators.…”

Section: Introductionmentioning

confidence: 99%

“…Few research reports have been published in areas such as the difference and correlation between multicyclone separator and single cyclone separator and how to calculate the multicyclone separator pressure drop under high pressure. In this study, the separation performance of multicyclone separator was measured by using the online measurement method as described in reference (Ji et al, 2009). The single separator and the multicyclone cyclone separator were compared in the separation performance and pressure drop under same inlet conditions.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Separation Performance of a Multicyclone Separator for Natural Gas Purification

Xiong

2014

Aerosol Air Qual. Res.

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This study evaluated the separation efficiency and developed a pressure drop model for a multicyclone separator used for natural gas purification. The collection and grade efficiencies of a multicyclone separator with 15 single cyclone separators were evaluated at inlet velocities of 6-24 m/s and particle concentrations of 30-2000 mg/m 3 at atmospheric pressure and room temperature. The experimental results show that although the collection efficiency of a multicyclone separator was 2%-10% less than that of a single cyclone separator at the same operating conditions, most of the particles larger than 10 μm in diameter can be removed by the multicyclone separator. Based on the theoretical pressure drop models of single and multicyclone separators at atmospheric pressure and the pressure drop data measured on site, a pressure drop model was developed that can be used to predict and calculate the pressure drops of multicyclone separators at different pressures and temperatures during natural gas transportation. The modeling results show that 80-90% of the overall pressure drop of a multicyclone separator can be attributed to the single cyclone separators in it. The pressure drop model proposed in this work can accurately predict the pressure drop for different high-pressure multicyclone separators.

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“…The basic components of an IPS are shown in figure 4.1, and follow the same principles of a cyclone separator [29,30] . Contaminated air enters the inlet and the mixed flow makes a turn aft of the hub where the particles have sufficient inertia to prevent them from following the air around this sharp corner.…”

Section: Introductionmentioning

confidence: 99%

Inertial Particle Separator Multiphase Dynamics

Barone¹

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The effects of sand and dust ingestion often limit the useful life of turbine engines operating in austere environments and efforts are needed to reduce the quantity of particulate entering the engine. Several Engine Air Particle Separation (EAPS) systems exist. In particular, Inertial Particle Separators (IPS) are of interest because they offer significant weight savings and are more compact. However, they do not yet provide separation efficiencies as high as that from barrier filter and vortex-tube separator technologies. In order to further improve the efficiency of IPS systems, an in depth study of the multiphase flow dynamics has been undertaken.An experimental approach was chosen to fill the void of available data and provide useful information for model validation. A wind tunnel has been designed, constructed and tested to study the multiphase flow dynamics of an inertial particle separator. The experimental facility includes a rectangular test-section ideal for optical access, and is capable of reproducing full-scale flow and particle conditions seen in separator systems. Separation efficiencies were measured for A4 Coarse Test Dust over a range of operating conditions for several geometries.Results show that the separation efficiency is dependent on the scavenge flow split and strongly dependent on the outer surface geometry. Further separation efficiency tests where conducted using nominally sized 10 µm, 35 µm, and 120 µm glass spheres to eliminate the complexities of dust size, shape, and density that are present in Arizona Test Dust. A model was then created to determine the separation efficiency for particles of any given size. iv Several flow visualization techniques were performed to determine the fluid and particle dynamics. Oil-streak flow visualization was utilized to characterize the flow along the walls of the IPS to determine the location of the recirculation zone and to verify that sidewall effects were minimal. Particle Image Velocimetry (PIV) was utilized to quantify the fluid flow field using small olive oil tracer particles. PIV was further utilized using 10 µm and 35 µm glass-spheres to determine the particle velocities in the IPS. Finally, high-speed video was used to capture the dynamics of the particle-fluid interactions. These experiments have shown the dynamic instabilities present in an IPS system that lead to lower separation efficiencies compared with other EAPS systems. The identification of these instabilities will help to improve future IPS designs. Also, the data collected during the course of this study provides the first reference of comparison for computational modeling of an IPS. for the last few years, but he has taught me a great deal. I couldn't ask for a better advisor.

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Experimental investigations on a cyclone separator performance at an extremely low particle concentration

Cited by 65 publications

References 11 publications

Experimental Study of Particle Collection Efficiency of Cylindrical Inlet Type Cyclone Separator

Experimental Study of Particle Collection Efficiency of Cylindrical Inlet Type Cyclone Separator

Investigation on the Separation Performance of a Multicyclone Separator for Natural Gas Purification

Inertial Particle Separator Multiphase Dynamics

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