Save water and maximise productivity – thickeners and clarifiers

High-rate thickeners 

High-rate thickeners are designed to provide roughly 12 times the throughput of conventional machines of similar size. The key features for high-capacity thickeners are the feedwell design and the feed slurry dilution method. Our patented E-Volute™ feedwell offers Computational Fluid Dynamics (CFD)- optimised energy dissipation and solids distribution. E-DUC® and P-DUC feed-dilution systems maximise flocculation efficiency and settling rates.

Standard thickeners 

Standard bridge-supported high-rate thickener designs are available for accelerated delivery and include either welded or bolted elevated steel tank designs up to 40 m in diameter and are ideal for many applications.

Traction thickeners 

Typically installed in concrete tanks, traction thickeners have a stationary centre pier which supports the rake mechanism central bearing about which the rake arms rotate. The centre pier also supports the rotating feedwell and partially supports the rake mechanism and access bridge. The bridge supports the feed pipe or feed open launder.  At the tank perimeter, the full-radius rake arm is supported on and driven by the drive unit (tractor). The drive unit runs steel traction wheels on a steel rail at the edge of the tank. Under appropriate climatic conditions, traction thickeners are an efficient, cost-effective design.

Bridge-supported and column-supported thickeners 

EIMCO^® and Dorr-Oliver^®  thickeners are available in both bridge-supported and column-supported designs. We offer beam- or truss-type bridges, depending on thickener diameter. In the bridge-supported design, suitable for thickeners up to 50 m in diameter, the drive is supported by the bridge, driving the rakes with a centre shaft. Column-supported design drives are supported by a stationary centre column of steel or concrete and are practical for thickeners up to 135 m in diameter.

Deep Cone™ thickeners 

EIMCO Deep Cone thickeners produce underflows concentrated to near their limit of pumpability. The deep tank design maximises pulp concentration, and produces uniform, non-segregating underflow slurry with a paste consistency.

E-Cat® Ultra High-Rate Clarifiers and Thickeners 

With its rakeless design, the E-Cat uses novel technology to accomplish both clarification and thickening in a single unit that takes up minimal area. The design advantages include: 

• Low capital cost compared to conventional thickeners 
• Low maintenance costs due to no moving parts 
• Much smaller area required compared to conventional thickeners 
• Low operating costs, low flocculant consumption

High-density thickeners 

By adding depth and torque to a high-rate design, high-density thickeners improve underflow densities at a substantially lower cost than deep cone thickeners.

Inclined plate thickeners/clarifiers 

Inclined plate clarifiers maximise the clarifier’s settling area while minimising the tank footprint. To increase the clarification area of conventional clarifiers, we offer inclined plate clarifiers for a range of tank sizes. These inclined plates are constructed in rectangular packs that operate on the same settling principles as the Delta-Stak® clarifier.

Reactor-Clarifier™ solids-contact unit 

EIMCO Reactor-Clarifiers offer optimal flocculation, solids contact and precipitation. Dual concentric rake and turbine drives provide solids raking, along with low shear pumping and mixing.

Delta-Stak clarifiers 

EIMCO Delta-Stak clarifiers combine the simplicity of gravity settling with inclined-plate sedimentation principles. Our patented design reduces space requirements and costs, while providing operational simplicity and high overflow rates.

Hydroseparators 

By increasing the rise rate in thickeners by ‘undersizng’ then we are able to separate particles on solids density differences to allow for lower density particles to flow into the external slope launder.

The addition of concentric elutriation piping on the floor of these units allows for an even higher rise rate and can be used to have a size separation between underflow & overflow.