The limestone-gypsum flue gas desulfurization （FGD） process has become the most widespread process in the world for sulfur removal. The swirl-jet-absorbing wet limestone-gypsum sintering FGD technology was developed...The limestone-gypsum flue gas desulfurization （FGD） process has become the most widespread process in the world for sulfur removal. The swirl-jet-absorbing wet limestone-gypsum sintering FGD technology was developed for sintering flue gas desulfurization,and this process produces volumes of wastewater with various contaminants that requires treatment before disposal or reuse. In this study, the wastewater quality from three different sintering FGD systems at Baosteel Group was investigated and compared with wastewater from power plant FGD. A treatment process was proposed which is suitable for sintering FGD wastewater. After treatment with a neutralization, coagulation and sedimentation process, heavy metals in the sintering FGD wastewater were reduced to a level meeting the relevant emission standards ,but the pH and ammonia concentration were too high, and a further treatment process was needed. Due to certain similarities and complementarities between sintering FGD wastewater and coking wastewater, it is entirely feasible to mix the pretreated sintering FGD wastewater into a biological coking wastewater treatment system. This study indicates that it is entirely feasible to mix pretreated sintering FGD wastewater into the biological treatment systems used for coking wastewater from the iron and steel industries.展开更多
文摘The limestone-gypsum flue gas desulfurization （FGD） process has become the most widespread process in the world for sulfur removal. The swirl-jet-absorbing wet limestone-gypsum sintering FGD technology was developed for sintering flue gas desulfurization,and this process produces volumes of wastewater with various contaminants that requires treatment before disposal or reuse. In this study, the wastewater quality from three different sintering FGD systems at Baosteel Group was investigated and compared with wastewater from power plant FGD. A treatment process was proposed which is suitable for sintering FGD wastewater. After treatment with a neutralization, coagulation and sedimentation process, heavy metals in the sintering FGD wastewater were reduced to a level meeting the relevant emission standards ,but the pH and ammonia concentration were too high, and a further treatment process was needed. Due to certain similarities and complementarities between sintering FGD wastewater and coking wastewater, it is entirely feasible to mix the pretreated sintering FGD wastewater into a biological coking wastewater treatment system. This study indicates that it is entirely feasible to mix pretreated sintering FGD wastewater into the biological treatment systems used for coking wastewater from the iron and steel industries.
