改性核桃壳滤料对油田含油污水的过滤效果  

Filtration effect of oilfield oily wastewater by using modified walnut-shell filter material

作　　者：王秀军[1,2] 翟磊[1,2] 靖波[1,2] 张健[1,2] Wang Xiujun Zhai Lei Jing Bo Zhang Jian(State Key Laboratory of Offshore Oil Exploitation, Beijing 100028, China CNOOC Research Institute, Beijing 100028, China)

机构地区：[1]海洋石油高效开发国家重点实验室,北京100028 [2]中海油研究总院,北京100028

出　　处：《化工环保》2016年第6期592-597,共6页Environmental Protection of Chemical Industry

基　　金："十三五"国家科技重大专项(2016ZX05025-003);海洋石油高效开发国家重点实验室第三批开放课题(CCL2015RCPS0221RNN)

摘　　要：采用亚硫酸氢镁蒸煮法对核桃壳滤料进行亲水改性,考察了改性核桃壳滤料对油田含油污水的过滤、反洗效果,探讨了改性前后核桃壳滤料的过滤过程及乳化油捕集机理。实验结果表明:在蒸煮温度为95℃、蒸煮时间为5 h、w(MgHSO_3)为5%的条件下,核桃壳滤料接触角由改性前的117.1°降至62.4°;分4批次过滤含油污水,改性核桃壳滤料的平均出水含油量为32.3 mg/L,平均油去除率为78.5%,平均浊度为7.7 NTU,平均浊度去除率为89.7%;改性核桃壳滤料的反洗效果显著改善,反洗水含油量由520 mg/L提高到840 mg/L,核桃壳滤料增重率由4.3%下降到0.2%。The hydrophilic modification of walnut-shell filter material was carried out by MgHSO3 cooking process. The filtration effect of oilfield oily wastewater and the backwash effect of the modified walnut-shell filter material were studied. The filtration processes and the emulsified oil trapping mechanisms of the walnut-shell filter material before and after modification were discussed. The experimental results show that： Under the conditions of cooking temperature 95℃, cooking time 5 h and w （MgHSO3） 5%, the contact angle of the walnut-shell filter material is decreased from 117.1% to 62.4% ; After 4 batches of filtration, the average oil content of the oily wastewater treated on the modified walnut-shell filter material is 32.3 mg/L with 78.5% of the removal rate, and the average turbidity is 7.7 NTU with 89.7% of the removal rate; The backwash effect of the modified walnut-shell filter material is improved significantly, the oil content of the backwash effluent is increased from 520 mg/L to 840 mg/L, and the weight gain rate of the walnut- shell filter material is decreased from 4.3% to 0.2%.

关 键 词：海上油田 含油污水 核桃壳滤料 表面改性 过滤 反洗 乳化油捕集 

分 类 号：X741[环境科学与工程—环境工程]