Taking the desulphurization wastewater spray drying tower installed in bypass flue of a 330 MW coal-fired power plant as the research object

the ANSYS ICEM and Fluent software were used to simulate the heat and mass transfer process in the drying tower. Moreover

the application demonstration results were analyzed. The results show that

under different working conditions

the temperature field and flow field in the spray drying tower are well distributed. The gas-liquid heat and mass transfer mainly concentrates in the tower's axial direction. The Cl~– in the desulfurization wastewater migrated into the solid products

which decreased the treatment difficulty. The desulfurization wastewater evaporated in the high-temperature flue gas

which reduced the high specific resistance dust anti-corona and promoted the accumulation of particulate matters

thus the large size particles can be captured easily by the electrostatic precipitator. The bypass flue gas drying technology has good operation effect for realizing zero discharge of the desulfurization wastewater.