Polymer dosing

Automatic polymer dosing

The Polymer Dosing System offers a unique and compact solution to your needs being a combination of polymer makeup system, dosing tank and distribution pump.

• In-line mixing, ensuring that preparation of the solution takes place in a continuous flow.

• A pressure regulating valve to stabilize pressure variations in feed water supply.

• Polymer delivery by peristaltic metering pump, which can be controlled by a 4-20 mA signal.

• Unique multi zone system to ensure effective mixing and activation of liquid polymer without creating inactivated polymer solution in the form of “fish-eyes” or “angel-hair”.

• Large mixing chamber providing sufficient time for polymer activation, made from non- transparent material to guarantee that none of the activated polymer solution is destroyed by UV-light prior to dosing.

• Transparent pipe on outlet to allow visual inspection of the diluted polymer solution

preparation systems to dissolve and dilute powder and emulsion needed at the conditioning and mechanical dehydration of the sludge to be treated inside the purification plants, SEFT proposes an automatic station is polyelectrolyte polypreparing machine for the continuous preparation of the fluocculant substances necessary to complete the chemical / physical process that favors the dewatering of the sludge.

Operation:

The powdered polyelectrolyte stored in a hopper is transported by a screw conveyor, and dosed in a first sector of the dilution tank, where it is appropriately diluted with water thanks to the action of an electromechanical agitator which favors its dissolution. At the end of this first phase the solution passes into a second sector to complete the preparation, to then conclude the process in a third sector of maturation, and be ready for use.

Same process for the preparation of the polyelectrolyte from a liquid concentrate takes place, instead of the powder doser a dosing pump is installed. Combined system liquid / powder systems allow maximum flexibility of use, also on the same equipment.

The passage between the various internal sectors of the tank is managed and controlled by a system of communicating vessels that automatically interrupt or resume its function once the desired level is reached by sector, this process is controlled and automated by an automated PLC electrical control panel.