Title: Towards efficient simulation of off-gas scrubbing by a hybrid Eulerian–Lagrangian model

Authors: Christoph Goniva, Zeljko Tukovic, Christoph Feilmayr, Stefan Pirker

Addresses: Christian-Doppler Laboratory on Particulate Flow Modelling, Johannes Kepler University, Altenbergerstrasse 69, A-4040 Linz, Austria. ' Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lucica 5, HR-10000 Zagreb, Croatia. ' voestalpine Stahl GmbH, Research & Development Ironmaking, voestalpine Str. 3, A-4020 Linz, Austria. ' Christian-Doppler Laboratory on Particulate Flow Modelling, Institute of Fluid Mechanics and Heat Transfer, Johannes Kepler University, Altenbergerstrasse 69, A-4040 Linz, Austria

Abstract: In a wet scrubber water is introduced into dust laden off-gas in order to capture the fine dust particles. The scrubbing process comprises a whole set of phenomena like droplet break-up, coalescence, liquid wall film and dust capturing. We introduce a comprehensive simulation model is where representative droplets are traced in a Lagrangian manner while the dust is treated as passive Eulerian phases. The wall film is considered by a model solving the shallow water equations, including models for droplet deposition, film separation and film stripping. Numerical results for pressure drop and capturing efficiency are in good agreement with measurements.

Keywords: wet scrubbers; off-gas scrubbing; Euler–Lagrange model; wall film models; dust capturing; entrainment; separation; droplet break-up; coalescence; liquid wall film; modelling; simulation; droplet deposition; film separation; film stripping; pressure drop; Venturi scrubbers; CFD; computational fluid dynamics.

DOI: 10.1504/PCFD.2010.035359

Progress in Computational Fluid Dynamics, An International Journal, 2010 Vol.10 No.5/6, pp.265 - 275

Published online: 26 Sep 2010 *

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