The utility model relates to the technical field of
sewage treatment equipment, and discloses a vertical
dissolved air flotation machine which comprises an air flotation
machine main body and a scraping plate movably connected inside the air flotation
machine main body through a chain, and a
water storage tank is arranged inside the scraping plate. By arranging the
water storage tank, when the scraper blade is soaked in water and moves, water below a scum layer can be collected in the
water storage tank, then when the scraper blade rotates
clockwise, water in the
water storage tank can be sprayed out through the water outlet tank, the surface of the scraper blade is automatically flushed through flow guide of the flow guide plate, attached scum can be removed in time, and the service life of the scraper blade is prolonged. The scraping plate is kept clean, the stable
slag scraping efficiency is maintained, normal operation of the air flotation machine main body is guaranteed, the scraping plate continuously and efficiently works, the probability of falling back to an air flotation tank is reduced, the
water quality purification effect is guaranteed, separated scum is prevented from being mixed into liquid again, and the follow-up treatment difficulty and cost are reduced.