Device for recovering waste engine oil in sewage pool

The device for recovering the waste engine oil in the sewage pool comprises a device body, a diffusion nozzle fixedly mounted in the device body, a gathering and filtering layer fixedly mounted in the device body, a separating and filtering layer fixedly mounted in the device body, a fine filter fixedly mounted in the device body and a fiber polymerizer fixedly mounted in the device body, an electric valve is fixedly mounted outside the device body, sewage can be primarily treated through the design that a floating filter plate is connected with a guide pipe, and oil and sewage can be separated for multiple times through the design of a gathering filter layer and a separation filter layer; meanwhile, small oil particles remaining in the separated sewage can be polymerized and separated again through cooperation of the fine filter and the fiber polymerizer, the separated dirty oil automatically flows into the first oil tank and the second oil tank, and then the water content of the dirty oil is reduced to the