Vertical air flotation device

The utility model discloses a vertical air flotation device, and aims to overcome the defects of large equipment size and low sewage treatment efficiency of an air flotation device in the prior art. The technical problem is solved through the following technical scheme that the device comprises a box body, wherein a slag outlet is formed in the side wall of the box body; the reaction chamber is vertically arranged in the box body, a sewage inlet is formed in the bottom of the reaction chamber, and a sewage outlet is formed in the top of the reaction chamber; the gas dissolving machine is used for providing gas dissolving water for the reaction chamber; and the scum scraping device is arranged in the box body and is used for discharging scum in the box body from the scum outlet. The reaction chamber is arranged in the box body, so that when the reaction chamber is separated from the side wall of the box body, the reaction chamber and the separation chamber are combined and arranged in the box body, and the str