Hydraulic powered mixing apparatus

摘要

Mixing apparatus includes a tank having an upright draft tube extending from above an operating level of liquid contained in the tank to a level near the bottom of the tank, the draft tube being in fluid communication with the tank at a level near the bottom of the tank below the operating level of the liquid. A nozzle is disposed within the draft tube for directing a stream of liquid downwardly against an impingement surface transverse to the draft tube at the level of fluid communication to entrain gas drawn down the draft tube and create a pattern of bubbles flowing radially outwardly from the draft tube. The impingement surface is close to, or is a portion of, the tank bottom so that the radially flowing bubbles sweep across at least a portion of the bottom of the tank.