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Hardwood log unscrambler | Conveyor pulley standard | Effluent channel screens | Chipper casing design | Log chain design
Effluent channel screens
Both coarse bar screens and submerged mesh screens are available, custom sized to suite the effluent channel geometry. Fabrication materials are selected according to the properties of the plant effluent.
Bar screen design
This is a simple automated rake that periodically sweeps over a submerged flat bar screen. The rake removes particles of size 12 mm and greater from wood chips to beverage cans and builders rubble. All moving parts are accessible from above the flow level, allowing convenient maintenance access.
The screen is designed to run on a 24 hour basis with a timer circuit controlling the rake sweep. The frequency of rake sweep is usually set on commissioning the screen, once the effluent load on the screen has been established.
The screen is most effective when used to pre-screen effluent prior to settlement in effluent clarifiers.
Mesh Screen
The unit is essentially an inclined wire belt conveyor, with tail end submerged. The screen runs a wire belting, which is available in a range of materials, and weave patterns. The wire offers reliable screening and excellent open area, for a minimum interference to the stream flow.
The screen utilizes a pressurized flow of wash water to wash the entrain fibrous materials and particles into a perforated collection pan. The pan drains directly back into the stream flow, and must cleaned periodically. The running speed of the wire is set on commissioning the unit, once the effluent load on the screen has been established.
The construction is such that the entire screen is supported on the head shaft alone, the tail end can be lifted out of the stream for maintenance and is free standing on the channel floor when in operation.
The screen can therefore be installed and serviced on line, with no effluent flow interruption.
