Multiple Screws Conveyor/Extractor

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Aquasystems International N.V. SFA enviro

Halle, Belgium

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The Enviroduo conveying and extracting unit is designed for difficult products such as sewage sludge. Enviroduo double screws are commonly used for the recovery of sludge under a filter press. This solution offers a large width in order to recover sludge cakes while preserving the height thanks to the use of screws of smaller diameters. The cakes break during their transfer and are even better when using the option of notched screws(screw with axis). This is favorable for the proper operation of conveyors installed downwards. Multi-screw technology is also used for the recovery of sludge stored in a silo (Enviromulti).
LAYOUTS of Screws Conveyor/Extractor

Trough
Conveyor Multispir MTS
Double screw
Covers
Motorizations
By-pass
Mobile cover
Bagging unit

TROUGH
For shaftless screws, the troughs are U-shaped and serve as a guide. For screws with an axis, a flat bottom trough solution is generally used.
DISCHARGE
The shape of the discharge case is modular according to the configuration of the implantation and according to the equipment chosen further for the transfer of the sludge.
SCREW
The shaftless screws are laying on HDPE lining and are guided by the shape of the trough which keeps them in their axis. This is generally the solution chosen for screw extractors. The screws with the axis are guided by bearings at the ends and intermediate bearings according to their length. This solution is well adapted in particular with notched screws.
MATERIALS of Screws Conveyor/Extractor

Construction in stainless steel 304L or 316L
Screw in special steel high resistance or stainless steel 304L or 316L

SPECIFICITIES of Screws Conveyor/Extractor

Recovery of sludge under filter press
Bottom silo extraction
Screw with shaft and without
Variable pictures
Reliability and durability

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