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Travelling Grit Dredger - Constant-Velocity Channel
When the preferred grit plant arrangement is in the form of parallel constant velocity channels, the automatic method of settled grit removal is with a travelling bridge type pump dredging machine.
The design of the dredger type unit reflects clients’ specifications but normally includes a travelling bridge supported on flanged bogie wheels running on a rail-track positioned on the concrete coping wall of the constant velocity channels. The bridge is fitted with grit dredging pumps of either the self-priming centrifugal or submersible type. These are arranged to discharge lifted grit into a bridge mounted cyclone washer and storage hopper or, alternatively, into a side concrete launder. This provides gravity flow to a remote grit classifying system, of the reciprocating rake or screw classifier type.
Combined Grit/Grease Removal
Based on the spiral flow principle
Travelling bridge type unit
Flows baffled to promote grease separation/flotation
Screw Classifier
All stainless steel construction
Screw sizes 200, 300 and 400mm diameter
Capacities 30, 80 and 120m³/hour
Reciprocating Rake
Inclinations between 11° and 16°
Widths 380 & 800mm
Maximum length 20 metres
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