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采用混凝处理烧结烟气氨法脱硫浆液,通过对比聚合硫酸铁(PFS)和聚丙烯酰胺(PAM)对浆液浊度的去除效果,确定了PAM为处理烧结烟气氨法脱硫浆液较佳的絮凝剂。同时,通过L16(44)正交实验,研究了PAM的投加量、pH值、反应温度和沉降时间4个因素对浆液浊度去除率的影响。结果表明,这4个因素对浊度去除率的影响效果分别为:PAM的投加量>反应温度>沉降时间>pH。得出浊度去除率最佳的絮凝条件为:絮凝剂投加量60mg/L,pH值8.0,反应温度40℃,沉降时间30min;此时,浊度去除率达到99.79%,剩余浊度为207NTU。
The coagulation treatment of sintering flue gas ammonia desulfurization slurry was adopted. By comparing the removal efficiency of slurry turbidity by PFS and PAM, it was found that PAM was the best choice for the treatment of sintered flue gas ammonia desulfurization slurry Flocculant. At the same time, the effects of PAM dosage, pH value, reaction temperature and settling time on turbidity removal rate were studied by L16 (44) orthogonal experiment. The results showed that the effects of these four factors on the turbidity removal rates were as follows: dosage of PAM> reaction temperature> sedimentation time> pH. The best flocculation conditions of turbidity removal rate were as follows: flocculant dosage 60mg / L, pH 8.0, reaction temperature 40 ℃, settling time 30min; At this time, turbidity removal rate reached 99.79%, the residual turbidity 207NTU.