Optimization of flue gas desulphurization absorber by means of computational fluid dynamics analysis

Abstract

In the paper we present an optimization study/retrofit of the flue gas desulphurization (FGD) absorber focusing on the flow field in the desulphurization vessel and the performance of the rotary atomizer used there. The study is performed using CFD code with a well validated model for the semi-dry desulphurization. For the numerical modeling of the multiphase flow in the absorber, the Euler-Lagrange approach is used with the Eddy Interaction Model. The numerical study focuses on the optimization of the flow field inside the absorber with the aim to increase the time during which the lime slurry remains in contact with flue gases. Results of the numerical modelling are in very good agreement with operational tests.