Device for treating ageing oil and oil-containing mud and sand

The utility model discloses a device for treating ageing oil and oil-containing mud and sand and relates to oil field waste treating devices. The device comprises a tank body and a stirrer, wherein the stirrer is fixedly arranged on the top of the tank body; a stirring blade of the stirrer is arranged in the tank body; an oil-containing sludge feeding hole and a material outlet are formed in the upper part of the tank body, an oil-containing sludge discharging hole, an ageing oil feeding hole and a washing steam inlet are formed in the lower part of the tank body, and a residual liquid outlet and a residual-liquid-free material outlet are formed in the bottom of the tank body; an air flotation device is arranged at the lower part in the tank body, an compressed air inlet of the air flotation device is formed in the outer part of the tank body; an ultrasonic generator is arranged on the tank body. The device has multiple functions and can be used for treating the ageing oil and the oil-containing mud and sand and effectively treating large-grain oil-containing sludge; the equipment size is small, the working efficiency is high; residues can be automatically cleaned and discharged after filtering, so that the secondary pollution is avoided; no medicament is used in the treating process, so that the environment is protected, and the treating cost is further lowered.