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脉冲激振反冲洗动态膜滤床工艺优化研究
Study on process optimization of a pulsed vibration backwashing dynamic membrane filter bed
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- DOI:
- 作者:
- 郭亮
- 作者单位:
- 中国石油大庆油田水务环保公司，黑龙江大庆 163000
- 关键词:
- 深床过滤；脉冲激振；滤料再生；工艺优化
deep bed filtration; pulsed vibration; filter media regeneration; process optimization
- 摘要:
- 针对三元复合驱采出水因聚合物和表面活性剂含量偏高，引发传统滤床反冲洗困难、出水水质难
以达标的行业难题，构建了脉冲激振反冲洗动态膜滤床处理系统，围绕滤料粒径、过滤速度、反冲洗强度
等关键运行参数开展优化研究。实验结果表明，在长周期稳态运行工况，滤料粒径0.15 mm、过滤速度
4 m/h、气水联合反冲洗强度为水强度6 L/（m2∙s）×气强度3 L/（m2∙s）的最优工艺参数下，现场稳态进
水中油质量浓度39.3 mg/L、悬浮物质量浓度24.1 mg/L时，系统出水中油、悬浮物质量浓度分别降至3.9、
4.8 mg/L，去除率分别达到68.4%、60.0%，出水水质可稳定满足SY/T 5329—2022油田低渗油层回注“双5”
标准。同时，该动态膜滤床过滤精度优异，出水粒径小于1.000 μm的颗粒占比高达97.2%，系统运行过程中
滤床压力可控、工况平稳，展现出良好的过滤精度与运行稳定性。该工艺显著改善高含聚采出水的滤料再生效
果，大幅提升了深度处理效率，可为油田高浓度聚驱采出水的高效净化与达标回注提供可靠技术支撑。
To address the industry problem that the high contents of polymers and surfactants in the produced water by alkaline surfactant-polymer flooding lead to the difficult backwashing of traditional filter beds and the failure to meet the effluent quality standards, a pulsed vibration backwashing dynamic membrane filter bed treatment system was constructed, and an optimization study was carried out on the key operating parameters such as filter media particle size, filtration speed, and backwashing intensity. The experimental results indicate that under the optimal process parameters of a filter media particle size of 0.15 mm, a filtration speed of 4 m/h, and an air-water combined backwashing intensity of 6 L/(m2·s) for water and 3 L/(m2·s) for air, the mass concentrations of oil and suspended solids in the system effluent are reduced to 3.9 mg/L and 4.8 mg/L, respectively; the removal rates of oil and suspended solids reach 68.4% and 60.0%, respectively; the effluent quality stably meets the “double 5” standard for oilfield reinjection. At the same time, the dynamic membrane filter bed has excellent filtration accuracy, and the proportion of particles with a size below 1.000 μm in the effluent is as high as 97.2%; during the system operation, the filter bed pressure is controllable, and the working conditions are stable, showing good filtration accuracy and operation stability. This process effectively improves the filter media regeneration effect for produced water with a high polymer content, significantly enhances the advanced treatment effect, and provides reliable technical support for the efficient purification and up-to-standard reinjection of high-concentration polymer flooding produced water in oilfields.