工业水处理 ›› 2024, Vol. 44 ›› Issue (6): 101-110. doi: 10.19965/j.cnki.iwt.2023-0435

• 试验研究 • 上一篇    下一篇

高温超稠油采出水的电絮凝实验及机理分析

谢亮1(), 石姝彤2, 郑帅1, 吴隽玮3, 孙鑫格2, 张琦4, 杨萍萍1, 曾玉彬2()   

  1. 1. 中油(新疆)石油工程有限公司, 新疆 克拉玛依 834000
    2. 武汉大学动力与机械学院, 湖北 武汉 430072
    3. 中国石油工程建设公司西南分公司, 四川 成都 610000
    4. 中国石油技术开发有限公司, 北京 100028
  • 收稿日期:2024-03-15 出版日期:2024-06-20 发布日期:2024-06-18
  • 作者简介:

    谢亮(1986— ),硕士研究生,高级工程师。E-mail:

    曾玉彬,教授。E-mail:

  • 基金资助:
    2022年度新疆维吾尔自治区科学技术厅天山英才计划项目(2022TSYCJC0002); 中国石油集团工程建设有限公司项目(CPECC2021KJ08)

Experiment and mechanism analysis of electrocoagulation for high temperature super-heavy oil produced water

Liang XIE1(), Shutong SHI2, Shuai ZHENG1, Junwei WU3, Xin'ge SUN2, Qi ZHANG4, Pingping YANG1, Yubin ZENG2()   

  1. 1. PetroChina (Xinjiang) Petroleum Engineering & Construction Corporation, Karamay 834000, China
    2. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
    3. Southwest Company, China Petroleum Engineering & Construction Corporation, Chengdu 610000, China
    4. China Petroleum Technology and Development Corp. , Beijing 100028, China
  • Received:2024-03-15 Online:2024-06-20 Published:2024-06-18

摘要:

采用电絮凝技术处理高温超稠油采出水,考察了反应时间、电流密度和极板间距对电絮凝处理效果的影响,通过响应面法对电絮凝处理超稠油采出水工艺条件进行了优化,并对电絮凝过程净化机理和电极钝化的影响因素进行了研究。研究表明,电絮凝技术能有效去除高温超稠油采出水中的油、COD和SiO2,反应时间对COD和SiO2去除率影响极显著。当反应时间为27.2 min,电流密度为8.6 mA/cm2,极板间距为1.8 cm时,COD和SiO2去除率分别为81.0%和100%。电絮凝对采出水起净化作用的是铝离子与OH-结合生成的多核羟基铝络合物胶体。采出水中Cl-含量的增加使铝板的钝化程度略有减弱,而SO4 2-和HCO3 -含量的增加使铝板的钝化程度增加;当采出水呈中性时,铝板的钝化程度最高。

关键词: 高温超稠油采出水, 电絮凝, 响应面法, 钝化

Abstract:

Electrocoagulation was used to treat the high temperature super-heavy oil produced water. The effects of relevant factors were studied, including reaction time, current density and plate distance. The response surface methodology was used to optimize the process conditions. The mechanisms of purification in electrocoagulation and factors affecting electrode passivation were also studied. The results showed that the electrocoagulation could effectively remove oil, COD, and SiO2 from high temperature super-heavy oil produced water. Reaction time had a significant impact on the removal rate of COD and SiO2. When the reaction time was 27.2 min, the current density was 8.6 mA/cm2, and the electrode distance was 1.8 cm, the removal rates of COD and SiO2 were 80.95% and 100% respectively. Electrocoagulation played an important role in the removal of organic matter, which was the multinuclear hydroxy aluminum complex colloid generated by the combination of aluminum ions and OH-. The increase of Cl- in the produced water slightly weakened the passivation of aluminum plates. The increase of SO4 2- and HCO3 - increased the passivation of aluminum plates. When the produced water was neutral, the passivation of aluminum plate was the highest.

Key words: high temperature super-heavy oil produced water, electrocoagulation, response surface methodology, passivation

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