Vertical flow air flotation device for water treatment and treatment process thereof

The invention discloses a vertical flow air floatation device for water treatment, which comprises an air floatation water tank and a dissolved air water tank, the air floatation water tank is provided with a cylindrical water treatment area and a cube-shaped scum area, the air floatation water tank and the dissolved air water tank are respectively connected to an air dissolving device, the air floatation water tank is communicated to an effluent weir through a pipeline, the effluent weir is connected with a lifting driving device, a liquid level detection device and a scum scraping device are arranged in the scum area, the liquid level detection device is in signal connection with an air floatation treatment control device, and a scum discharging device arranged outside the air floatation water tank is connected to the scum outlet end of the scum scraping device. The invention also discloses a treatment process of the vertical flow air floatation device; the end face of the air floatation water tank is gradu