Developed to allow the straightforward removal of waste plastic film directly from the transport flow, a light fraction separator (LFA) increases the performance of sorting facilities, and also prevents filter systems from clogging. To make maintenance as easy as possible, the separator is equipped with a hydraulically opening flap. The separator impresses with its above-average separation efficiency and an availability which is just as high.

Operating principle

The light fraction separator operates according to the principle of a rotary feeder. Air laden with plastic film and other lightweight fractions is fed to the separator. A perforated grid prevents unwanted material from being carried along any further. Instead, this material is moved along by blades which are arranged on a shaft turning at a constant speed inside the perforated plate basket.

From a defined rotational position onwards, the negative pressure ceases to have effect in the chambers, and the plastic sheets fall down to where they can be collected and removed accordingly.

Technical specifications

Field of application
  • As a main separator or pre-separator unit, e.g., in an air classifier or dust extraction system
  • For light or ultralight fractions, i.e., mainly for plastic film, paper, etc.
Flow rates air volume 5,000-60,000 m³/h, Maximum separation capacity 75 m³/h
Blowing intensity 3-6 bars
Variants (dimensions)
  • LFA k-a (2522 mm x 2828 mm x 1706 mm)
  • LFA m-a (3003 mm x 2828mm x 1706 mm)
  • LFA g-a (3504 mm x 3140 mm x 1913 mm)
Equipment features
  • Hydraulic hinge-type hood and hinge-type perforated plate basket
  • Various perforated sheet metal elements with different hole diameters
  • Permanent lubrication using grease cartridges
  • Automatic dedusting unit, differential pressure monitoring and rotation monitoring of rotor available on an optional basis
Benefits
  • Continuous high level of purity during separation without any clogging and thus higher availability for connected systems as, e.g., air classifiers
  • Adaptable to different input materials
  • Small footprint achieved by compact design
  • Minimal-wear operation especially when using optional automatic dedusting and differential pressure monitoring
  • Extremely easy to maintain, lateral Inspection doors allowing inspection of perforated sheet metal surfaces even during operation

OPtionen

Automatic dedusting

The perforated plate basket is cleaned using compressed air, while the blowing intensity may be adjusted to between 3 and 6 bars using a pressure reducer. The blow nozzles we developed guarantee that the entire cleaning surface is covered.

Differential pressure monitoring

Differential pressure monitoring helps to check the degree of separator contamination in order to ensure more appropriate maintenance. A sharp rise in differential pressure may indicate, e.g., an obstruction in the pipeline.       

Rotation monitoring

To continuously monitor the rotation of the rotary feeder, the drive shaft ca be equipped with an additional sensor. This enables plant owners to respond at an early stage if there is any disturbance in the light material discharge.

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