Recycling section ultrafiltration system

The utility model provides a recycling section ultrafiltration system. The system comprises a self-cleaning filtering device, an ultrafiltration device and a produced water reflux device, the self-cleaning filtering device is provided with a self-cleaning filter and a recycling ditch; the ultrafiltration device is provided with two pipelines, namely a compressed air pipeline, a cleaning water pipeline and an ultrafiltration membrane; the produced water backflow device comprises an ultrafiltration produced water pool and a CIP cleaning water tank; the self-cleaning filtering device, the ultrafiltration device and the produced water backflow device are connected through pipelines. According to the utility model, the ultrafiltration separation process is low in energy consumption, and chemical reaction and phase change do not occur in the separation process; the separation process is carried out at normal temperature; pressure or concentration is used as driving force in the separation process, equipment and the