聚合硅磷硫酸铁处理稠油石化污水的研究

High-Viscosity Petrochemical Wastewater Treatment with Polymerized Silicon-Phosphorus Ferric Sulfate as Flocculant

以实验室合成的聚合硅磷硫酸铁和聚丙烯酰胺为絮凝剂,系统研究了絮凝剂用量、pH值、温度、搅拌时间和沉淀时间对辽河石化分公司稠油石化污水絮凝效果的影响,确定了聚合硅磷硫酸铁的最佳使用条件:质量浓度为200mg/L,pH值为6～9,温度为25～45℃,搅拌时间为2min,沉淀时间为3min.聚合硅磷硫酸铁和辽河石化分公司现场使用絮凝剂的对比实验结果表明,聚合硅磷硫酸铁对油、COD、硫、酚的平均去除率分别为94.1%,69.4%,88.9%和43.5%,明显高于现场使用药剂的80.5%,35.8%,21.1%和17.3%.

A new flocculant named polymerized silicon-phosphorus ferric sulfate was developed in lab to treat high-viscosity petrochemical wastewater in a plant of Liaohe Pertrochemical Corporation. The results showed that its optimal treating parameters are as follows： mass concentration 200 mg/L, pH value 6-9, temperature range 25-45℃, stirring time 2 min and sedimentating time 3 min. Under such conditions, a series of comparison tests were done between the newly-developed flocculant and currently-used one during wastewater treatment in the plant, and the comparison results showed that the former can remove 94.1% oil, 69.4 % COD, 88.9 % sulfide and 43.5 % volatile phenol, i.e. , much higher than the latter of which the corresponding removing rates are 80.5%, 35.8%, 21.1% and 17.3%, respectively.