Venturi scrubbers are widely used to control industrial
emissions,
because of their high efficiency in the removal of particles from
gases. To correctly size and design these equipments, detailed information
on the fluid dynamics is very important. The purpose of this article
is to study, both experimentally and through CFD simulations, the
fluid dynamics of the gas and liquid phases in the core of the throat
of a rectangular Venturi scrubber under different experimental conditions.
The variables studied were the pressure and the volumetric fraction
of each phase. The standard κ–ε turbulence model
and the volume of fluid (VOF) multiphase model, as implemented in
the ANSYS Fluent 12.0 software, were employed. Liquid distribution
inside the throat of the Venturi was studied experimentally, using
optical imaging techniques. The results indicate that the model and
numerical procedures were able to describe both the pressure drop
profile and the liquid jet formation and trajectory successfully.
The results suggest that, for the same gas and liquid flow rates,
the number of liquid injection orifices does not affect the pressure
drop, but affects significantly the liquid fraction distribution profile
inside the equipment.
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