Numerical Simulation Of Flow Field In The Canopy Wet Desulfurization Dust Catcher

Based on the mechanism of mass transfer process in the spraying device, a new wet desulfurization dust tower-canopy wet desulfurization dust catcher with simple structure, high production capability and large throughput is exploited. This paper adopted numerical simulation and experimental study, and the flow performance in the canopy wet desulfurization dust tower was numerically simulated with Fluent software.The gas-phase simulation was described as continuum phase, using reynolds average N-S equations as basic control equations, standard k-εturbulence model and SIMPLE algorithm.The gas-liquid two-phase simulation was based on the result of the gas-phase simulation. The liquid phase was introduced by establishing spray source for the gas-liquid two-phase coupling calculation. The gas flow and the motion of the liquid drop lets is described in a Lagrangian way, using DPM model. It was shown that the canopy wet desulfurization dust catcher has stronger turbulence intensity and larger gas-liquid contacting area which lead to more liquid content, longer particle residence time, stronger mass transmission.In the simulation of the gas-liquid-solid three-phase ,The gas phase and the solid phase were dealt with in the Euler coordinates, while the motion of liquid particles was described in the Lagrange coordinates with Fluent software. A closed Euler/ Euler/ Lagrange mathematical model for simulating gas-liquid-solid three-phase local flow was established. Gas volume fraction, solid volume fraction, liquid concentration distribution etc in the tower were analyzed, and a general rule for dust was obtained. The simulation results agreed well with the experimental data, which would be helpful for practical operation and optimization design of the scrubber. The canopy wet desulfurization dust rower is suitable for larger-scale industrial desulfurization and dust removal.