The advection dissolved air flotation machine is a solid-liquid separation equipment commonly used in the sewage treatment industry. It can effectively remove suspended solids, grease, and glue substances in the sewage. It is the main equipment for the preliminary treatment of sewage. It can effectively remove light flocs that are difficult to settle in wastewater. It has a large processing capacity, high efficiency, a small footprint, and a wide application range. It is widely used in wastewater treatment in petroleum, chemical industry, printing and dyeing, papermaking, oil refining, leather, steel, mechanical processing, starch, food, etc.