Successful Intergration Of Partial FGD & SCR at Sinter Plant in CSC

by Yu-Bin Hong

Publisher - China Steel Corporation, Kaohsiung, Taiwan

Category - General Novel

Air pollution is a serious issue in iron-making, especially the sintering process. Major air pollutants, particles, NOx, SOx and DXN, have been managed in the sinter plant. A majority of pollutants are decreased significantly by carrying out effective end-of pipe technology such as Selective Catalytic Reduction (SCR) in the sinter plant except for SOx. Therefore, Flue Gas Desulphurization (FGD) is the next prime development. However, it is difficult to integrate FGD with existing SCR due to limited space in the sinter plant. Partial Flue Gas Desulphurization (pFGD), 40 percent of flue gas with high SOx concentrations are desulphurized through the FGD, which was developed at No.4 sinter plant. The advanced pFGD consists of a wet-method absorber, Gas/Gas heater, electrostatic precipitator, booster fan and switched dampers of the wind-box were also established. Since 2013, friendly, environmental sintering process were fulfilled successfully to minimize the NOx, DXN, and SOx emissions by means of integration of existing SCR and partial FGD at NO.4 sinter plant in China Steel Corporation.

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