基于电絮凝工艺的油田采出水节能减排分析OA

To improve the treatment performance and reduce the operating energy consumption of oilfield produced water treatment processes,a laboratory-scale electrocoagulation system was established.The effects of key parameters,including current density,electrode spacing,reaction time and reaction temperature,on COD removal efficiency,unit energy consumption and hydrogen production were systematically investigated,and the optimal process parameter range was determined and verified through pilot-scale tests.Laboratory experiments showed that under the conditions of current density 70 A/m2,electrode spacing 60 mm,reaction time 30 min and reaction temperature 45℃,the COD removal efficiency reached 92.8％,the unit energy consumption was 15.1 kW·h/kg,and the hydrogen production was 944 mL.Field pilot results demonstrated that the electrocoagulation process had good adaptability to oilfield produced water,with an average COD removal efficiency stably above 90.5％.The comprehensive operating cost of the electrocoagulation process was 1.6 yuan/m3,36％lower than that of the chemical flocculation process,and the annual CO2 emission reduction was about 911 t.The results can provide an effective technical solution for energy saving and emission reduction in oilfields.