Oil sludge treatment process

The invention discloses an oil sludge treatment process, and belongs to the technical field of oil sludge treatment. The oil sludge treatment process comprises the following steps: S1, oil sludge pretreatment: weighing quantitative oil sludge, putting into a stirrer, adding a flocculating agent during stirring, spraying a passivating agent by using spraying equipment, and carrying out coagulating sedimentation to obtain a precipitate; S2, mechanical dehydration of the oil sludge: extruding and filtering precipitates by adopting a filter press to remove water in the precipitates; S3, oil sludge retreatment; and S4, oil sludge drying: cutting the oil sludge subjected to filter pressing into small sludge cakes, putting the small sludge cakes into a low-temperature drying machine, and spraying an atomized passivating agent into the low-temperature drying machine by utilizing an atomizer while drying. According to the invention, a passivating agent is guided into a stirring machine by adopting a flow guide pipe ex