摘要
大牛地气田采气污水处理流程的高温部位结垢严重，利用Davis—Stiff饱和指数法、Ryznar稳定指数法与硫酸钙结垢指数法预测污水结垢趋势。结果表明，当采气污水温度超过50℃时，CaCO3结垢严重，且随着温度升高，CaCO3结垢趋势加剧，XRD分析结果表明，此结垢产物为不同晶型的CaC03混合物。污水处理过程中加入60-80mg／L阻垢剂453，阻垢率达到85％以上，可以有效抑制结垢。
Serious scaling occurred in the high temperature region of wastewater treatment process in Daniudi gasfield.Its scaling tendency was predicted by Davis-Stiff saturation index,Ryznar stable index and CaSO_4 scaling index.The results showed that serious CaCO_3 scaling would arise if the waste water was heated up to 50 ℃,and it became more serious with higher temperature.The XRD analysis results showed that the scale was a CaCO_3 mixture with different crystal structures.The scaling damage would be alleviated if 60-80mg/L scale inhibitor called 453 was used,and the scaling inhibition ratio would exceed 85%.
出处
《油气田环境保护》
CAS
2016年第5期14-17,60,共4页
Environmental Protection of Oil & Gas Fields
基金
陕西省科技统筹创新工程计划项目(2012KTCG01-11):陕北特低渗透油田含硫采油污水回注处理技术研究与应用
关键词
气田污水
结垢预测
碳酸钙垢
阻垢
producing wastewater of gasfield
scaling prediction
CaCO_3
scale inhibition
