Effects of the Nozzle Location on Hydrodynamic Properties of a VenturiType Scrubber

Abstract

This study reports the hydrodynamic properties of a wetted venture-type scrubber by injecting the liquid (water) into the mixture (air) flowing inside the venture. Venturies are used in various engineering applications such as in the chemical industry for the removal of dust and aerosols, waste combustion installations, gasification process, glass industry, and metallurgy for several types of degasses and marine industry for cleaning the gas from the unwanted harmful emissions such as SO2, H2S, and dust. The Computational Fluid Dynamics (CFD) technique is used for unsteady and turbulent flow of mixture in the venture. The Ansys Fluent, a commercially available CFD package is used for this two-phase flow. Before proceeding further, the numerical model is validated successfully with the data found in the open literature and then the parametric studies are performed in a systematic manner. For this purpose, the location of the nozzle(s) used for water injection into the venture scrubber is changed from the wall of the convergence section of the venture to the throat where the gas accelerates. The flow field is visualized with the pressure, and velocity contours, and the pressure and velocity distributions are shown along with the pressure drop in the venturi to assess the more suitable location of the nozzle.