Abstract: Fluent software was used to numerically simulate the functions of three key components (gas distributed ring, cooling pre-processor, and vortex collision component) during vortex collision desulfurization. The influence rules of the three components on the flow field of sintering flue gas were fit with MATLAB software, It is shown that under the optimal distribution of flue gas the installation location of the gas distributed ring is linear with the ring width. The greater the water-jet velocity from the cooling pre-processor, the lower the temperature of flue gas is. When the water-jet velocity exceeds 30 m·s^-1, the temperature of flue gas does not change significantly with increasing water-jet velocity; as a result, the best range of water-jet velocity is 25 to 30 m·s^-1. The pressure loss of flue gas increases with the tangential velocity of the vortex collision component increasing. When the tangential velocity is over 20 m·s^-1, the pressure loss rises sharply. The tangential velocity of the vortex collision component should be controlled at about 20 m·s^-1, indicating that the rotational speed of the tray is about 85 r·min^-1.