WANGFei,TAOXiao-rui,PANGHuan-yan,et al.Pilot Study on Desalination and Polymerization of Produced Water from Ternary Compound Flooding[J].China Water & Wastewater,2024,40(11):103-108.
Pilot Study on Desalination and Polymerization of Produced Water from Ternary Compound Flooding
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第11期
Page:
103-108
Column:
Date of publication:
2024-06-01
- Keywords:
- ternary compound flooding; produced water; electrochemical oxidation; ultrafiltration; electrodialysis
- Abstract:
- The combined process consisting of electrochemical oxidation, ultrafiltration and electrodialysis was employed for advanced treatment of the effluent from a sand filter. The optimal conditions for the combined process were as follows: the electrochemical oxidation current was set at 40 A, with pH of 6.5 and zinc salt coagulant dosage of 800 mg/L, and the transmembrane pressure difference for ceramic membrane ultrafiltration was maintained at 0.20 MPa, with membrane surface flow rate of 4 m/s, concentration ratio of 5 times, influent temperature of 40 ℃, electrodialysis operating voltage at 150 V, and recovery rate of 65%. The removal rates of the combined process under the optimal conditions were as follows: 97.1% for suspended solids, 83.8% for oil content, 99.3% for polymer, and 95.2% for TDS. The effluent complied with the water quality for dissolving coagulant (salinity less than or equal to 400 mg/L) specified in section 5.5.2 in Indexes and Analytical Method of Injected Water Quality in Reservoir Water Flooding in Daqing Oil Field. The results of the polymerization performance test indicated that the polymerization of ternary low salinity water was superior.
Last Update:
2024-06-01