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A correlation giving improved description of the capacity and efficiency of vane-type gas-liquid separators

Dries, Huub; Hoffmann, Alex Christian
Peer reviewed, Journal article
Accepted version
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URI
https://hdl.handle.net/1956/21850
Date
2019
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  • Department of Physics and Technology [1343]
Original version
https://doi.org/10.1002/aic.16566
Abstract
Vane‐type demisters are attractive droplet separators because they combine robustness and sufficient separation efficiency with a low‐pressure drop, a high capacity and some fouling resistance. Experience shows that their optimal operation is close to the maximum capacity point and even that at this point the separation efficiency is better at higher pressures. This article proposes a generalized expression this point, as a function of gas and liquid flow and properties, drawing on knowledge about other, related, unit operations, namely cyclone separators and distillation towers. The generalized expression relates the dimensionless velocity with the Archimedes number and a flow parameter. The expression builds on earlier work on a criterion for the inception of droplet entrainment in two‐phase film flow, pioneered by Ishii and Grolmes, and is supported by considerable experimental work published over the last 50 years.
Publisher
Wiley
Journal
AIChE Journal
Copyright
Copyright 2019 American Institute of Chemical Engineers

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