摘要：

油田回注水中的二价铁离子会降低部分水解聚丙烯酰胺(HPAM)的黏度。采用化学氧化法去除油田污水中Fe²⁺,试验了双氧水、次氯酸钠和高锰酸钾对Fe²⁺的去除效果,并考察了Fe²⁺去除后HPAM黏度的恢复情况。实验表明,3种氧化剂皆能快速去除油田污水中的Fe²⁺,并有效改善Fe²⁺造成的聚合物黏度损失。经过使用安全性、方便性和性价比对比,发现固体次氯酸钠不仅能快速有效地去除Fe²⁺,改善聚合物黏度,且价格合理,使用方便,是最优的氧化剂。

关键词: 聚合物黏度, 二价铁离子, 氧化法

Abstract:

The bivalent ferrous ions in oilfield reinjection water could partially reduce the viscosity of hydrolyzed polyacrylamide(HPAM). Chemical oxidation method has been used for removing Fe²⁺ from oilfield wastewater. The effects of hydrogen peroxide(H₂O₂),sodium hypochlorite(NaClO) and potassium permanganate(KMnO₄) on the removal of Fe²⁺ are tested,and the recovery situation of HPAM viscosity after the removal of Fe²⁺ investigated. The experimental results show that all of the three oxidants can quickly remove Fe²⁺ from oilfield wastewater,and effectively improve the viscosity loss of polymer caused by Fe²⁺. After the comparison on security, convenience and performance price ratio,it is found that solid NaClO not only can rapidly and effectively remove Fe²⁺ and improve polymer viscosity,but also is the best oxidant,being characterized by reasonable prices,and convenient application.

Key words: viscosity of polymer, ferrous ions, oxidation method

中图分类号: 

• X703.1