Working Principle

Dissolved air flotation uses a new, highly efficient dissolved air device—a microbubble generator—to dissolve air into the water, replacing traditional air entrainment equipment. Several inclined tube assemblies are installed within the flotation area, including a housing, scraper, and spiral discharger, forming a complete flotation water purification system. Generally speaking, flotation treatment effectiveness is not directly related to residence time, but only to the flotation area. If the flotation area at a water depth of H is reduced to H/10, the flotation distance and residence time will be reduced tenfold. This is the famous "shallow pool theory."

The purpose of adding inclined tubes to the flotation zone is to increase the flotation area, significantly reducing the Reynolds coefficient and preventing turbulent flotation. Instead, it creates a laminar flow, achieving shallow flotation. Similarly, when the density of suspended solids is greater than 1, the installation of the inclined tubes creates a shallow pool sedimentation effect, allowing sedimentation to occur under turbulent conditions. Pollutants with larger particle size and higher specific gravity that are less likely to float are concentrated in the sludge collection area, achieving the goal of water purification.