摘要
在国内某综合性钢铁厂的零排放工程中,对生产排放的电厂脱硫废水、烧结制酸废水、焦化废水反渗透浓水及树脂再生废液进行预处理除氟。工程实践中,可以利用废水自身“高硬高氟”特点,通过调碱沉淀工艺除氟,可减少药剂费用,其除氟效率不高,平均仅为33%,需在零排放工程中浓缩水量减少后再进行末端除氟。然而,采用PAC絮凝除氟工艺,除氟效果好,PAC投加量为200~400 mg·L^(-1)时,除氟效率达到59%~80%。
In the zero-emission project of a comprehensive steel plant in China,the wastewater including desulfurization wastewater from power plant,acid-making wastewater from sintering plant,reverse osmosis concentrated water of coking wastewater and resin regeneration waste water need to be pretreated for fluoride removal.In engineering practice,fluoride could be removed by adjusting the alkali precipitation process by taking advantage of the"high hardness and high fluorine"characteristics of the wastewater,which can reduce the cost of chemicals.However,the efficiency of this fluoride removal process is still not high,with an average of 33%,terminal defluorination should be carried out after water concentration in zero-emission projects.However,the PAC flocculation defluorination process has a good defluorination effect.When the dosage of PAC is 200~400 mg·L-1,the defluorination efficiency is 59%~80%.
作者
王文俊
周伟
Wang Wenjun;Zhou Wei(Baowu Water Technology,Co.,Ltd.,Shanghai 201999,China)
出处
《山东化工》
CAS
2023年第18期251-253,共3页
Shandong Chemical Industry
关键词
除氟
零排放
高盐废水
混凝沉淀
工程设计
fluoride removal
zero liquid discharge
high salt wastewater
coagulation and sedimentation
engineering design