Harmless treatment system for oily sludge

The utility model relates to the technical field of oil exploitation, in particular to a harmless treatment system for oily sludge. Aiming at various corrosives, impurities in pipelines and various sediments generated in a high-sulfur-content gas field, the sediments are complex in components, black in water quality, high in COD content and sulfide content, large in viscosity and pasty, a mixed reaction tank in the oily sludge recovery treatment system is arranged in a partitioned manner; according to the utility model, waste water is successively treated in a zoning manner and then is filtered and reinjected, and sludge is collected to the sludge treatment assembly through the first sludge discharge port at the bottom of the mixed reaction pipe for centralized treatment, so that the waste water and the sludge can be fully separated and are respectively treated through two different procedures, and the waste water and the sludge are fully stirred by the mixed reaction tank and are matched with the action of c