油田污水过滤罐活性炭原位氧化再生

In situ oxidation and regeneration of activated carbon in oilfield sewage tanks

采用过硫酸铵(APS)热活化复合超声波及甲醇萃取的方法原位再生油田污水过滤罐活性炭,考察了初始pH值、过硫酸铵用量、反应温度、反应时间、超声波强化APS功率及甲醇浓度对活性炭再生效果的影响。结果表明,APS热活化复合超声波及甲醇萃取的方法再生效果更好。当初始pH值为7,APS溶液浓度为500 g/L,反应温度为70℃,反应时间为30 min,超声强度为60%,甲醇萃取浓度100%,再生2次,活性炭的再生效率分别为79.16%和66.84%。

The activated carbon from oilfield wastewater filter tank was regenerated in situ by ammonium persulfate(APS)thermal activation combined with ultrasonic and methanol extraction.The effect of the initial pH value,the dose of ammonium peroxide,the reaction temperature,the reaction time,the ultrasonic enhanced APS power and the methanol concentration on the adsorption efficiency of the regenerated activated carbon was investigated.The results show that the combination of APS thermal activation with ultrasound and methanol extraction results in better regeneration.When the initial pH value was 7,the APS solution concentration was 500 g/L,the reaction temperature was 70℃,the reaction time was 30 min,the ultrasonic intensity was 60%,the methanol extraction concentration was 100%,and the regeneration efficiency of activated carbon was 79.16%and 66.84%,respectively.