Recovered lubricating oil impurity removal device and method

The invention discloses a lubricating oil recovery and impurity removal device, and relates to the technical field of lubricating oil recovery, the lubricating oil recovery and impurity removal device comprises a dehydration device and a solid removal device, the dehydration device comprises an agent adding tank and a demulsification tank, the agent adding tank is internally provided with a mixer, and the demulsification tank is internally provided with an ultrasonic demulsification assembly; the solid removal device is located at the downstream of the dehydration device, the solid removal device comprises a separation tower, the separation tower is arranged in the vertical direction, a plurality of filtering assemblies are arranged in the separation tower, projection parts of the adjacent filtering assemblies in the horizontal plane are overlapped, and the filtering assemblies form a baffling channel in the separation tower. According to the impurity removal device for the recovered lubricating oil, most of