明珠号生产污水系统的微气泡旋流气浮选改造

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110~120 m~3/h,运行压力为50~80 k Pa,溶气水注入流量为1#罐体1.3~1.8 m~3/h、2#罐体2.0~2.5 m~3/h、3#罐体2.0~2.5 m~3/h、4#罐体2.3~2.8 m~3/h,溶气水注入压力为400~500 k Pa,浮选剂投加质量浓度为30~40 mg/L,清水剂投加质量浓度为15~20 mg/L时,能够在入口油质量浓度100 mg/L的条件下使出口油质量浓度30 mg/L;当入口油质量浓度100mg/L时,除油率70%。

Modification of the micro-bubble whirling air flotation of industrial wastewater system on Mingzhu

Since the technological pr ocess 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 in-jection 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.