Up-flow type air flotation device

The utility model discloses an up-flow air flotation device and relates to the technical field of sewage treatment. The top of the upflow tank is open, the upper part of the upflow tank is provided with a water outlet pipe communicated with an inner cavity, and the lower part of the upflow tank is provided with a water inlet pipe communicated with the inner cavity; the scum discharge tank is fixedly arranged at the opening of the up-flow tank, one end of the scum discharge tank is positioned in the inner cavity, and the other end of the scum discharge tank extends to the outer side of the up-flow tank; and the scum scraper is rotationally arranged at the opening, is positioned above the scum discharge groove and is used for scraping the scum in the up-flow tank into the scum discharge groove to flow out. Furthermore, a supporting seat for supporting the motor is arranged at the top of the up-flow tank; the motor is vertically and fixedly arranged on the top of the supporting base, and a rotating shaft of the