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Live bottom Silos and sludgereceival bunkers

Technical Details

Introduction:SPIRAC livebottom silos and hopper systems are custom designed for application in the wastewater industry,especially for the storage, transfer and outloading of dewatered sludges. While the silos and hoppers followstandardized design features, sizes and orientations can be customized to suit most customer requirements.SPIRAC standardized configurations are also available to provide a wide range of cost effective designs. Thesesilos are top loaded, typically by shaftless spiral incline or vertical/horizontal conveyors, and outloaded by largediameter/large pitch livebottom shaftless screws. These livebottom systems ensure the elimination of arching,rat-holing or any bottle-neck type losses in flowability, even for the stickiest or driest of sludges. The basic silodesign incorporates aesthetic considerations through symmetry, consistency and fabrication precision.

Storage capacity25-750 m

3(1000 - 27,000 ft

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Outloading Capacity0-200m

3/hr (0 - 7,000 ft

3/hr) outloading capacity – truck bay (high capacity) or pump/conveyor feed (low capacity).

Discharge via multiple knifegate controlled large diameter outlet ports to suit truck dimensions.

Design certification and seismic considerations:SPIRAC silo designs are typically structurally certified by a specially qualified structural engineer for static loadsas well as seismic zone consideration.

Suitable sludge types:Dewatered sludges from centrifuges, plate or belt press, DS range from 10-40%Dried sludges up to 90% DS (special considerations may apply)

Available materials of construction:Silos and hoppers can be manufactured from high spec mild steel or stainless steel, with standard structuralelements including I-beams, columns, PFC, angles, hollow sections, flat bar and plate steel. Silos can be shoppainted to extreme corrosion protection levels or primed for site painting.

The Live Bottoms

Conveying Technology

Purpose built leak proofbell housings for directmounting of gearboxes.

Shaftless spirals (Qty 2-6) of specialHTMAS steel, large diameter, largepitch, high strength, for low RPM, hightorque operation. Low maintenanceand blockage free operation.

Heavy reinforcingplates for highstatic head loads

Central dischargewith bi-directionalspirals

SS or K1040 high strengthsteel shafts.

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Typical siloInstallations

Typical Receival Bins/Bunkers

Typical Outloading Arrangements

Small Medium

Large Extra Large

Conveying Technology