无机陶瓷膜处理油田采出水

Treatment of oilfield produced water by inorganic ceramic membrane

针对陶瓷膜在油田采出水处理过程中操作参数的选择及污染机理进行了研究。通过现场实验,分析了不同的操作参数对膜通量的影响,陶瓷膜对含油量及悬浮物的去除效果,膜阻力组成及膜污染清洗方法。实验结果表明,在确定出水水质达到低渗透油田注水水质A1级标准条件下,陶瓷膜过滤最佳操作条件为:跨膜压差0.16 MPa、温度50℃、膜面流速5.0 m/s。同时发现,NaOH和HNO3联合清洗有助于恢复膜通量。

The operation parameters and fouling mechanism of ceramic membrane used for treating oilfield produced water were discussed. The field test analyzed the effects of different operation parameters on membrane flux, oil and suspended solid removal efficiency by ceramic membrane, the constituent of membrane resistance and the cleaning method of membrane fouling. Experimental results show that the optimal operation condition are transmembrane pres- sure of 0.16 MPa, temperature of 50℃ and cross-flow velocity of 5.0 m/s when the quality of the effluent is achieved with A1 standard. Results also show that NaOH combined with HNO3 is helpful to recover membrane flux.