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℃,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 ℃ 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.
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