Hydraulic characteristics of sieve and valve trays

Fasesan, S. O.

doi:10.1021/ie00070a030

Cited by 14 publications

(10 citation statements)

References 4 publications

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“…Experimental points published by (El-Azrak 1988) for the same valve kind (Glitsch V-4) show dependence to gas velocity comparable to present results (power =1,7). The deviation from theoretical dependency to gas velocity was reported by other authors for different valves ( (Piqueur & Verhoeye 1976) with A1 Glitsch and KV Koch valves; (Mustafa & Békássy-Molnár 1997) with Nutter valves; (Fasesan 1987) with Koch T).…”

Section: Emulsion Heightmentioning

confidence: 58%

“…Comparison between experimental data issued from different studies using different valves is then possible. Figure 7 shows results for L=3.2 10 -3 m 3 /m.s in comparison with results of (Dhulesia 1984), (Fasesan 1987) and (Mustafa & Békássy-Molnár 1997) on different valve trays. Present results are reasonably in accordance with these references.…”

Section: Clear Liquid Height H Lcmentioning

confidence: 99%

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Experimental hydrodynamic study of valve trays

Brahem

Royon-Lebeaud

Legendre

et al. 2013

Chemical Engineering Science

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International audienceValve trays column design for gas treatment still relies on empirical correlations developed on pilot units. The available correlations lead to large discrepancies and thus more experimental works are needed. The present hydrodynamic study was carried out on a Plexiglas 1.26 m per 0.1905 m absorption column containing four V-4 Glitsch valve trays. Water/air system was used at atmospheric pressure and ambient temperature. Liquid rate per weir unit length was varied between 3.2×10−3 m3.(m.s)−1 and 24.3×10−3 m3.(m.s)−1 and the kinetic gas factor between 0 and 3.5 Pa0.5.The following hydrodynamic parameters were determined: tray pressure drop, valves pressure drop, clear liquid height, mean emulsion height and liquid mean hold up on the tray. Correlations for clear liquid height, liquid mean hold up and emulsion height are proposed.Emulsion profiles characterisation was possible due to video records post-processing. Four different behaviours are identified for emulsion profiles according to liquid and gas velocities.Significant behaviour changes on the hydrodynamic parameters allowed the identification of three system limits: dumping, weeping and pre-flooding. Correlations are proposed for these limits and an operational diagram is presented

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Section: Emulsion Heightmentioning

confidence: 58%

Section: Clear Liquid Height H Lcmentioning

confidence: 99%

Experimental hydrodynamic study of valve trays

Brahem

Royon-Lebeaud

Legendre

et al. 2013

Chemical Engineering Science

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“…However considerable discrepancies exit between sets of correlations encountered in the literature which makes optimisation of column design difficult to achieve. Experimental works have been carried out on hydrodynamics and mass transfer mainly on sieve trays, and little on valve trays (sieve trays: Zuiderweg and Harmens, 1958;Mc Allister et al, 1958;Barker and Self, 1962;Kister and Haas, 1988;Colwell, 1981;Zuiderweg, 1982;Bennett et al, 1983;Fasesan, 1987;valve trays: Scheffe, 1984;Pohorecki and Moniuk, 1988;Peytavy et al, 1990;Liang et al, 2008). Yet malfunctions on industrial columns still occur (Kister, 2003;Kister and Olsson, 2011), even for sieve trays which have been most studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of path length on valve tray columns: Experimental study

Brahem

Royon-Lebeaud

Legendre

2015

Chemical Engineering Science

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Hydrodynamic and interfacial area measurements on two different size columns. Phenomenological correlations proposed for key design parameters. A non-negligible effect of the flow path length on mean emulsion profiles. a b s t r a c tExperimental measurements of hydrodynamic and interfacial area parameters are carried out over two rectangular pilot scale valve tray columns. The effect of tray path length on extrapolation between the two columns is studied and phenomenological correlations for hydrodynamic and interfacial area are proposed. Correlations are compared both to literature and to industrial results showing good agreement and a significant improvement for the prediction of industrial conditions. Discrepancies preventing an accurate description of industrial trends are highlighted through comparison between typical emulsion height profiles on both columns.

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“…The dry-plate pressure drop is a significant constituent part of the total pressure drop. This is the pressure drop associated with vapor flow through the orifices in the tray without the presence of liquid (Fasesan, 1987). Not only the dry-plate pressure drop can reflect the tray operating condition as well as performance, but also it is the cornerstone for calculation of other hydraulic parameters (Bennett et al, 1983;Qian et al, 2006).…”

Section: Pressure Dropmentioning

confidence: 99%