Diluting the feed to a selected concentration is critical for efficient flocculant and solids interaction. The Vector® feed system is fitted with a HydroForce (active) controllable feed dilution system to dilute the incoming feed to the optimal concentration.
The HydroForce controllable feed dilution system utilizes a variable speed axial flow pump to provide the desired volume of dilution water required. This is drawn from the thickener surface to prevent disturbing the settled bed or disrupting the dynamics within the thickener. This unit is accurately controlled via a locally mounted variable speed drive and control loop provided from the existing DCS. These interact with a control panel and output display that is mounted on the thickener bridge. There are typically two or three units mounted on each feed system depending on the application, as this provides flexibility to ensure a wide range of feed dilution can be achieved and also can be used to increase or decrease the mixing energy as the feed changes.
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