预氧化技术在油田污水处理中的研究与应用

在油田污水处理过程中,在投加传统污水处理剂之前,先加氧化剂(如次氯酸钠、双氧水等),可使水中的有害离子(如Fe~(2 ))转化为有用的离子(如Fe~(3 ),有絮凝净水作用),然后再通过絮凝剂和助凝剂的作用,可使污水得到进一步净化。由于氧化剂的作用,可大大减少石灰乳的用量,从而可使污泥产出量减少三分之二以上。实验表明,当污水中Fe~(2 )含量较低时,氧化剂可选用次氯酸钠；当Fe~(2 )含量超过5 mg/L时,选用双氧水氧化剂为宜。

Research on Application of Pre-oxidation Technology in Oil Field Waste Water Treatment

In oil field waste water treatment,the addition of oxidants like sodium hypochlorite and hydrogen peroxide before the addition of conventional waste water treatment chemicals can convert the harmful ion(such as Fe~(2 ))in water to useful ion(such as Fe~(3 ) with coagulation ability)and purify waste water through the working of coagulant and condensation booster.Under the effect of oxidant,the lime requirement is greatly lowered and sludge production is reduced by over 66 percent.The tests show that,at the lower Fe~(2 ) in waste water, sodium hypochlorite can be selected as oxidant,and oxygen peroxide is a good selection when Fe~(2 ) is over 5 mg/L.