Abstract:

The desulfurization effective ion mass concentration in seawater directly affects the efficiency of the desulfurization system. The desulfurization effective ion mass concentration of seawater in a coastal coalfired power station in Vietnam is affected by fresh water drainage. In order to meet the desulfurization requirements of the power station, it is necessary to calculate the desulfurization effective ions changing with fresh water drainage. A 2D water flow mathematical model of the project is established. Based on the verification of the model, the HCO3- mass concentration at the water intake of the power station at different periods is calculated and the mass concentration of main desulfurization effective ion of seawater, HCO3-, is analyzed. The research shows that during the maximum runoff period, the fresh water drainage has the most significant effect on the  HCO3- mass concentration at the water intake; during the minimum runoff period, the fresh water drainage has a weak influence on the HCO3- mass concentration at the water intake. The research results can provide a basis for designing seawater desulphurization systems of power stations.

Key words:

fresh water drainage, seawater desulphurization system, effective ion, mathematical model, ion mass concentration