Industrial processes redefined with ANDRITZ decanter centrifuges A

Process flexibility

• Constant separation results, even at fluctuations in the volumetric flow, the process conditions, or the product characteristics

Process conditions

• Gas-tight, vapor-tight, or pressurized operation
• Low vibration levels
• Absolute pressures from 0 to 8 bar, -90° C to +200° C
• CIP cleaning
• Flameproof or explosion-proof standards making the decanter ideal for applications with solvents and hazardous materials

Low space requirement

• Compact design at high specific throughput
• Self-contained system, therefore no extra space required for peripheral equipment

Chemical resistance

• Materials such as titanium, pure nickel, or Hastelloy provide the security essential in demanding process applications.

Low space requirement

• Compact design at high specific throughput
• Self-contained system, therefore no extra space required for peripheral equipment

Low operating costs

• Operating consumables (e.g. filter cloths) are not required. No costly downtime for changing consumables.

Clarification

• Clarification is the separation of solids from a liquid of lower density over a particle size range from 1 to 10,000 microns.
• By increasing the centrifugal force, it is possible to also separate very small particles in the submicron range, even with very small differential density.

Classifying

• By controlled reduction of the residence time, classification according to particle size, down to the submicron range, can be achieved with sharp separation cuts.

Liquid/liquid separation

• Liquid phases of differing densities can also be separated.

Thickening

• Fine solids separated from the liquid can be thickened in a hindered settling mode, utilizing the volume of the cylindrical section of the decanter to maximize compression.

Compression

• Compactive dewatering provides a substantially higher degree of dewatering with compressible solids.

Washing

• Efficient and cost-effective counter-current washing is made possible by separate removal of the wash liquor over several sections of the screen.

Dewatering

• The solids dewater by a combination of drainage and compression. The degree of drainage/compression depends on the nature of the solids, the setting of the centrifuge, and the required degree of dewatering. 
• The transport and discharge of pasty, sludge-like or shear-sensitive solids are facilitated by the appropriate combination of conveyor geometry, cone geometry, and control of the differential speed.

Mixing and re-suspension

• Special solids discharge geometry (gutter) allows the dewatered solids to be mixed with liquid directly at the discharge, thus eliminating the need for an additional mixing vessel.

Applications

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