基于级配滤料的含聚污水过滤-反冲洗运行模式优化  

Optimization of Filtration-Backwashing Operation Pattern for Polymer-containing Wastewater Based on the Interlayer Graded Filter Material

作　　者：黄作男 殷晓辉 郭婧 蒋鸿建 Huang Zuonan;Yin Xiaohui;Guo Jing;Jiang Hongjian(Oil Recovery Plant No.4,PetroChina Daqing Oilfield Company Limited)

机构地区：[1]中国石油大庆油田有限责任公司第四采油厂

出　　处：《油气田环境保护》2024年第4期21-28,共8页Environmental Protection of Oil & Gas Fields

基　　金：黑龙江省博士后科学基金“含聚污水深度处理工艺运行界限及配套技术研究”(LBH-Z16037)。

摘　　要：随着聚合物驱三次采油技术的广泛应用,含聚污水已成为油田采出水处理的难点,采用双层或多层级配滤料,以及改变滤料层间级配填充高度比,被认为是改善含聚污水处理效果的一种有效手段。文章基于污水处理站以石英砂和磁铁矿为主要滤料选型的运行实际,从层间级配滤料不同填充高度比关系出发,数值模拟研究了含聚污水过滤-反冲洗过程,揭示了层间级配滤料对过滤-反冲洗性能的影响,并结合实验验证,对含聚污水过滤-反冲洗运行模式进行了优化。结果表明,含聚污水过滤过程中压力场的显著性波动特征集中出现在滤料层区域,随着填充高度比的减小,自滤料层上部区域转向滤料层深部区域,同时,适当增加磁铁矿滤料层厚度,有利于悬浮粒子在滤料层中的去除;反冲洗过程中,当石英砂滤料层的填充厚度增加时,滤料层颗粒运动行为更为显现,更有利于附着在滤料颗粒表面悬浮粒子的脱附;推荐以1.67~2.20填充高度比的层间级配模式过滤低含聚浓度污水、以1.28~1.67填充高度比的层间级配模式过滤高含聚浓度污水。研究结果为含聚污水提效过滤处理过程中层间级配调整方案的设计与实施提供了依据,也为滤料选型及多层级配方案的优化与设计提供了基础。With the of widespread application of polymer flooding tertiary oil recovery technology,polymer-containing-wastewater has become a difficult problem in the treatment of oilfield produced water.It was deemed to be an effective mean to improve the treatment effect of polymer-containing wastewater by double-layer or multi-layer filter material and the change of filling height ratio for interlayer graded filter material.Based on the actual operation of the sewage treatment stations with quartz sand and magnetite as the main filter materials,starting from the relationship between the different filling height ratios of interlayer graded filter material,the filtration-backwashing process of polymer-containing wastewater was studied by numerical simulation,and the effect of interlayer graded filter material on the performance of filtration-backwashing was revealed.Combined with experimental verification,the operation pattern of filtration and backwashing of polymer-containing wastewater was optimized.The results showed that the significant fluctuation characteristics of pressure field in the filtration process of polymer-containing wastewater were concentrated in the filter material layers region.With the decrease of the filling height ratio,the significant fluctuation of pressure field turned from the upper part of the filtering layers to the deep part of the filtering layers.Meanwhile,properly increasing the thickness of magnetite filtering layer was beneficial to remove suspended particles in the filtering layers.During backwashing,when the thickness of quartz sand filtering layers increased,the movement characteristics of filter material layer particles was obvious,which was beneficial to the desorption of suspended particles attached to the surface of filter material particles.It was recommended to filter the low polymer concentration wastewater by the interlayer graded filter materials with filling height ratio in the range of 1.67~2.20,and filter the high polymer concentration wastewater by the interlayer graded f

关 键 词：滤料级配 过滤 反冲洗 处理效果 含聚污水 

分 类 号：X703[环境科学与工程—环境工程] TE992.2[石油与天然气工程—石油机械设备]