摘要:
采用自制的复合洗涤液,选用热化学洗涤处理法,在氢氧化钠和复合洗涤液质量分数分别为2.0%,3.0%,油罐底泥/复合洗涤液(质量比)为1∶3,洗涤时间为120 min,洗涤温度为60°C,搅拌转速为300 r/min的条件下,可处理油罐底泥.结果表明:在此条件下,油罐底泥可实现油、水和砂土三相分离,脱油率达到97.6%;油罐底泥洗涤后,洗涤废水经过破乳,混凝处理,含悬浮物和含油质量浓度分别为2.0,8.0 mg/L,浊度为3.2 NTU,可以排往污水处理系统或循环使用.%The bottom sludge from oil tank was treated by thermal chemical washing method with self-made compound washing liquid under the conditions of the mass fraction of sodium hydroxide and compound washing liquid 2.0%,3.0% respectively,bottom sludge from oil tank to compound washing liquid mass ratio 1∶3,washing time 120 min,washing temperature 60 °C and stirring speed 300 r/min.The results showed that under these conditions,the three-phase separation of oil,water and sand in the bottom sludge from oil tank could be carried out,the deoiling rate was 97.6%.After the bottom sludge from oil tank washed,the washing waste water was treated by demulsification and coagulation,the mass concentration of suspended solids and oil was 2.0,8.0 mg/L respectively,turbidity 3.2 NTU,it could be discharged into a sewage treatment system or cyclic utilization.