Treatment system of wastewater from circulating water

The utility model provides a treatment system of wastewater from circulating water, which comprises a flocculation-air flotation-filtering integrated device, a cartridge filter and a frequently changing pole electrodialysis device. The flocculation-air flotation-filtering integrated device is equipped with a flocculation area, an air flotation area and a filtering area, the filtering area consistsof four mutually independent filter chambers which are arranged in parallel, each filter chamber is equipped with a filter chamber water inlet, a back washing water inlet, a filter chamber water discharging opening and a back washing water discharging opening which are independently controlled, the filter chamber water inlet and the back washing water inlet are respectively communicated with an air flotation tank water discharging opening and a back washing water collecting tank through pipelines, the filter chamber water discharging opening is connected with the cartridge filter via a pipeline, and a water outlet of the cartridge filter is connected with the frequently changing pole electrodialysis device. The key of the treatment system includes utilizing the flocculation-air flotation-filtering integrated device to meet continuous requirements upon water of follow-up processes or equipment through parallel arrangement of the filter chambers.