Pulsafeeder Polyfeeder EN - Manual (Page 4)

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14.1 B-Series Polyfeeder Control Panel l .................................................................................46
Introduction
The POLYFEEDER
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is a reliable, efficient system for the make-down of polymer solutions.
Versions are available with a variety of neat polymer feed equipment to suit the individual
application, including solenoid, gear, and progressing cavity pump technology. Several control
options are available as well, to best integrate the system into the user’s facility.
2. Principle of Operation
Figure 2-1 BASIC SYSTEM FLOW DIAGRAM
Dilution water is introduced to the system at the water inlet solenoid valve under pressure. T
he water is then delivered to the mixing chamber in one or two individual streams, primary
(required) and secondary (optional). The flow rate in each stream is regulated with a globe
valve and flowmeter.
The primary dilution stream is directed into the center of the mixing chamber, where it is
combined with neat polymer. Neat polymer is introduced to the system at the polymer inlet
valve and pumped via the polymer feed pump to an anti-clog polymer injector (patent
pending) located in the primary dilution water stream just prior to the mixing chamber. The
injector design prevents polymer from interacting with the water before it is injected.
The mixing chamber incorporates a motorized dispersion blade that, in combination with the
labyrinth design of the chamber itself, results in efficient and complete polymer make-down.
The neat polymer and water mixture is subjected to an initial high shear mixing zone and then
the mixing energy slowly diminishes until the solution exits the mixer.