Abstract:In the Fluent software,a three-dimensional steady-state model was constructed based on the Euler-Lagrangian method and user defined function(UDF).And the Discrete Phase Model(DPM) coupled with the Euler Wall Film(EWF) model is used to conduct a numerical simulation study on condensation heat and mass transfer between wet flue gas and spray droplets and the surrounding walls in the condensing chamber.The simulation results show that the coupling of DPM and EWF model can more accurately simulate the condensation heat transfer of wet flue gas in the condensing chamber.The greater the inlet flue gas flow rate and the lower the height of the condensing chamber,the higher the outlet flue gas temperature and water vapor volume fraction,the lower the flue gas heat exchange efficiency,and the range of change gradually slows down;the higher the height of the condensing chamber,the greater the condensation amount of wet flue gas on the wall. However,with the increase of the inlet flue gas flow rate,the influence of the height of the condensing chamber on the condensation heat transfer gradually weakens,and the increase of heat exchange efficiency with the increase of the height of the condensing chamber is significantly reduced.