INDOFAB Flocculators are designed with 2 or more sets of Flocculation paddles to give desired results of flocculation. The Paddle Size is selected such that the Velocity Gradient G is obtained with rated design power at Standard Speeds to sweep 15% to 25% of the Flocculation zone area.
INDOFAB Flocculators are provided with INDOFAB Drive Heads for best results and trouble free operation. The Drive heads are capable of taking Torque as well as Axial & Topping loads of the Flocculator. INDOFAB Flocculators are modular in Construction and all paddles are mounted on Radial Structural Supports fixed to the Hollow Pipe Shaft.
For large size Flocculators a steady bearing guide at bottom is preferred to avoid excessive Shaft diameter. All the Components are carefully designed for stability in continous operation and material of construction are selected to suit process requirements.
Flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. The most common used coagulant is alum, Al2(SO4)3•14H2O.
The chemical reaction involved:
Al2(SO4)3•14H2O → 2Al(OH)3(s) + 6H+ + 3SO42- + 8H2O
During flocculation, gentle mixing accelerates the rate of particle collision, and the destabilized particles are further aggregated and enmeshed into larger precipitates. Flocculation is affected by several parameters, including mixing speeds, mixing intensity, and mixing time. Flocculation is usually carried out by Mechanical Mixing through Agitators called flocculators having Paddles. The Entire system is designed in such a way that a reasonable G value (Velocity Gradient) is achieved assisting the Floc formation and ensuring optimum utilization of flocculants.
