02

Wind Sifters

Wind sifters are used in waste management to separate materials of different densities, such as heavy and light materials.

Depending on product, product quantity, field of application and/or task, different types of wind sifters are available:

Blow-Suction Sifter

The blow-suction sifter works optimally up to a material throughput of 8 tons per hour.

The material to be separated is fed to the sifter head via a conveyor belt with adjustable belt speed. The discharge parabola of the sorting material is controlled by means of a directed air flow. The heavy material falls down onto a discharge belt, while the light material is sucked off upwards and fed to a special sifter (light material sifter/cyclone), which separates the air from the light material.

The sifter system works with partial circulating air, whereby between 10-30 % excess air is fed to an external dust extraction system.

Blow-Suction Sifter Type MBS-2200

With the new Blow-Suction Sifter type MBS-2200, bulk material is separated into heavy and light material especially useful for large pieces of plastic foil. The wind sifter was developed in cooperation with the company Matthiessen K&M Fördertechnik GmbH.

The material to be sifted is fed onto the selector from Matthiessen via a feeding belt. The selector pulls large foils along and drops the other material. Via the downstream sifter from the company Schulz & Berger GmbH, this foil is cleaned again and the material quality is decisively improved.

A ventilator generates a stream of separating air through which the material falls. This separates the material into heavy and light material. The heavy material falls down out of the separator and is transported away by a moving belt. The light material is sucked off via the upper outlet of the separator head and fed to the material separator via a transport pipe. There the light material is separated from the transport air.

The air sifter operates in partial air circulation mode, i.e. only approx. 20% of the air is fed to a dust extraction system.

Vertex Axle Sifter or Drum Sifter System (two fractions)

The drum sifter or vertex axle sifter, separates bulk material with different grain sizes into heavy and light material. It is particularly suitable for large volume flows (up to 30 tons per hour).

The material is fed into the sifter via a conveyor belt. A fan generates a stream of separating air through which the material falls. This separates the material into heavy and light material. The heavy material falls down out of the sifter and is transported away by a conveyor belt. The light material, however, is blown into a large expansion chamber via a crown shaft and falls onto a further discharge belt where the excess air is sucked out of the expansion chamber. This air stream is again led over a cyclone sifter.

The drum sifter works in partial air circulation mode, i.e. only approx. 10-30 % of the air has to be fed to a dust removal system. This means that the dust-removal system can be designed with small dimensions. This type is therefore particularly suitable for large volume flows.

Three-Fraction Sifters

The three-fraction sifters (patent pending) is a new development of Schulz & Berger. The system is preferably used in waste management companies and is able to separate heterogeneous material flows into three fractions.

This system provides a high degree of purity of the individual fractions at the end of the separation process. The three-fraction sifter can be used up to a throughput of 25 tons per bulk density.

The fed material stream is separated by a specific air flow within the sifter. An adjustable vertex drive shaft made of stainless steel allows the system to be adapted to various materials. The heavy and medium-heavy fractions are discharged via various conveyor belts or alternatively via containers or bunkers. The super light fraction is sucked off by a pneumatic transport system.

The Three-Fraction Sifters are characterized by

  • three fractions
  • an extremely robust construction
  • its compact size
  • high material throughput
  • very high degree of separation
  • high reliability and low cleaning requirements
  • various adjustment options for adaptation to customer-specific requirements

Nodule Sifter

The newly developed nodule sifter separates bulk material preferably in the medium-grain sizes of the waste management industry. A novel design and mode of operation with a cyclone-like effect enables the separation of a heterogeneous material stream, which can consist of different fractions, into individual components. After successful separation, the heavy fractions are transported away by conveyor belts. The light fraction is then vacuumed off.

The Nodule Sifters are characterized by:

  • a high degree of purity of the separation into the individual fractions
  • reduction of losses of hard plastics
  • a high degree of efficiency
  • its compact design
  • and significantly fewer blockages at the sifter head

Various adjustment options ensure that the nodule sifter can be adapted to different customer requirements. The nodule sifter can be easily integrated into existing wind sifter systems to significantly improve their efficiency.

Swivel Plate Sifter

The newly developed Swivel Plate Sifter can be used for the separation of large-area films in oversize grain sizes.

The material flow is fed to the sifter head via a conveyor belt with adjustable belt speed. An adjustable blowing nozzle generates a directed air flow, through which the material stream is separated. The heavy material falls down onto a discharge belt. The light material is vacuumed upwards and fed to a special sifter (light material sifter/cyclone). Here the air is separated from the light material.

The sifting system works with partial circulating air, whereby 10-30 % excess air is fed to an external dust extraction system.

Advantages of the Swivel Plate Sifter:

  • large passage for oversized particles
  • reduction of the risk of clogging due to a swiveling baffle plate
  • compact construction
  • easy retrofitting in a belt transfer
  • high degree of purity of the separation into the individual fractions
  • a multitude of setting options

Stage Sifter

The stage sifters are the new alternative to the zigzag sifters. It separates bulk material preferably in the fine or medium grain size ranges of the waste management industry.

A novel design and mode of operation enables the separation of a heterogeneous material stream, which can consist of different fractions, into individual components. After successful separation, the heavy fraction is transported away by conveyor belts. The light fraction is sucked off and separated by a cyclone or light fraction separator.

Various adjustment options ensure that the step sifter can be adapted to different customer requirements.

Advantages of the Stage Sifter:

  • a high degree of purity of the separation into the individual fractions
  • a high degree of efficiency
  • easy retrofitting in a belt transfer
  • fast adaptation to different material flows
  • new rotary wheel sluices
  • its compact construction
  • inclination adjustable baffle plates

The main components:

  • Separator head (e.g. drum sifter sifter / ascending sifter)
  • High-performance fan
  • Sifter Trap (Material Sifter/Cyclone Sifter)

You can find more information in our brochure.
If you are interested, simply write to us directly.

Brochure Contact