The QJB type submerged mixer is one of the key equipment in the water treatment process, capable of achieving uniform and flowing process requirements for the two-phase (solid-liquid) and three-phase (solid-liquid-gas) flows during the biochemical process. It consists of a submerged motor, impeller, and installation system. The submerged mixer features a direct-drive structure. Compared to traditional high-power motors that use a reducer to reduce speed, it offers advantages such as compact structure, low energy consumption, and ease of maintenance. The impeller is precision cast or stamped, featuring high precision, strong thrust, and a streamlined, aesthetically pleasing design. This series is suitable for locations requiring solid-liquid mixing and blending. The structural diagram is as follows.