Oil treatment system in oily wastewater system

The utility model relates to an oil treatment system in an oily wastewater system, a waste water basin is connected with an oil-water gatherer through a pipeline, and a pump is disposed on the pipeline; then the waste water basin is connected with an oil separation solidifying apparatus consisting of an outer barrel and an inner barrel with round cross sections through a waste water pipe, a compressed air pipe composed of at least two concentric circular pipes and radial straight pipes in crossed connection is disposed on the cross section at the bottom part of the inner barrel, and holes are evenly arranged on the upper surface of the pipeline wall fully. Oil-water separation in the oil separation solidifying apparatus comprises the following steps: oily wastewater enters the oil-water separation solidifying apparatus in the tangential direction; compressed air enters the compressed air pipe, and is pressed out from the holes on the pipe to push oil molecules to float upwards, so as to realize oil-water sepa