Circulating oil recycling system

The utility model discloses a circulating oil recycling system, relates to the technical field of coal chemical industry, and solves the problems of complex structure and low recycling rate of a circulating oil processing system in the prior art. The system comprises a circulating oil tank, a delivery pump, a circulating oil pipeline, a low-fraction oil pipeline, a stripping tower and a fractionating tower, the circulating oil tank is communicated with the input end of the delivery pump, the output end of the delivery pump is communicated with the input end of the circulating oil pipeline, and the output end of the circulating oil pipeline is communicated with the low-pressure oil pipeline; the low-separated oil pipeline is communicated with an inlet of the stripping tower, and the stripping tower is used for stripping mixed oil of circulating oil and low-separated oil; an outlet of the stripping tower is communicated with an inlet of the fractionating tower through a pipeline, and the fractionating tower is