摘要：

明珠号FPSO生产污水流程不稳定,加气浮选器效率低,抗波动能力差,难以保证最终出水含油达标。对现有气浮设备进行微气泡旋流气浮选改造,制备出气泡粒径为5~10μm的溶气水。通过调试,当运行流量为110~120m³/h,运行压力为50~80kPa,溶气水注入流量为1^#罐体1.3~1.8m³/h、2^#罐体2.0~2.5m³/h、3^#罐体2.0~2.5m³/h、4^#罐体2.3~2.8m³/h,溶气水注入压力为400~500kPa,浮选剂投加质量浓度为30~40mg/L,清水剂投加质量浓度为15~20mg/L时,能够在入口油质量浓度<100mg/L的条件下使出口油质量浓度<30mg/L;当入口油质量浓度>100mg/L时,除油率>70%。

关键词: 微气泡旋流, 溶气水, 油田污水

Abstract:

Since the technological process of FPSO industrial wastewater of Mingzhu is not stable,the efficiency of air-entrapping gas flotator is low,and the anti-fluctuation ability is weak,it's difficult to ensure that the final effluent can reach the set standards. Through the micro-bubble swirling air flotation modification,the dissolved gas water whose bubble size is 5-10 μm can be prepared. By means of debugging,when the optimum operating pa-rameters are as follows:operation flow rate is 110-120 m³/h,operation pressure 50-80 kPa,dissolved gas water injection flow rate at Tank 1^# 1.3-1.8 m³/h,at Tank 2^# 2.0-2.5 m³/h,at Tank 3^# 2.0-2.5 m³/h,at Tank 4^# 2.3-2.8 m³/h,injection pressure of dissolved gas waster 400-500 kPa,flotation agent mass concentration added 30-40 mg/L,and water clarifier dosing mass concentration 15-20 mg/L,the oil mass concentration at the outlet is <30 mg/L,under the condition of oil mass concentration at the inlet <100 mg/L. The oil removing rate can be>70%,when the oil mass concentration at the inlet is>100 mg/L.

Key words: micro-bubbles swirl, dissolved gas water, oilfield wastewater

中图分类号: 

• TE992