PAS Promeco Air Separator
Ballistic separator air
The air/ballistic separator PROMECO "PAS" is renowned for its high efficiency in sorting light materials from the heavy ones.
Specifically designed to address the issues related to the sorting of municipal and similar solid waste, commingled plastic waste, or waste from selective collection, the ballistic air separator PROMECO "PAS" is designed to handle the situations where a difference in specific weight of the materials to process can be exploited to sort 3 distinct fractions:
- Heavy fraction (stones, glass, metal, wood, textile wet ...)
- Light fraction (paper, film, various plastics ...)
PAS ballistic/air separator allows to get a clean fraction that can be reduced in size using secondary shredders such as PROMECO KR, in order to get a RDF fluff free from undesirable materials. The usage of ballistic/air separators PROMECO PAS is strongly suggested before shredders and secondary granulators.
High efficiency and ease of operation are accompanied by a remarkable versatility.
These machines are provided with a precise and easy to operate setting system, to meet different needs.
Applications
- Separation of plastic film from plastic bottles and containers
- To preserve the one-shaft shredder in advance in RDF plant
- Sorting of stones, metals, glass and the light inorganic fraction from the materials used to produce RDF
- Removal of contamination / impurities (plastic, glass, metals) from compost
- Processing of specific waste classes such as "car fluff, paper mill pulper, plastic to recycle, sand from sweeping.
Principles of Operation
1. Feeding conveyor and vibrating table
The PAS is fed by a 800 - 1000 mm width conveyor. Materials to process are conveyed to a vibrating table that, from an initial width of 1000 mm, widens to the size of the PAS model employed (1,200 to 1,500 - 2,000 or specifically tailored on customer needs), thus allowing the material to be distributed uniformly over the entire width.
The vibrating table, with proper inclination, is supported by four springs or rubber blocks, allowing the vibration. Motion is provided by two appropriately sized vibrators (2,2 – 4 kW), depending on the model.
2. Grate (separation of fine size fraction)
At the base of the vibrating table is a grate, with holes of the desired diameter (typically 10,15 or 25 mm) to intercept the fine size materials of the inert fraction (sand, small glass pieces, etc..). Inert fine fraction can be collected in a container or on a conveyor in case where high quantities are to be handled.
Fast conveyor
The material "opened" by the vibrating table feeds a tape. Typically the input material is distributed on the conveyor in layers of average height from 50-100 mm, covering 60-90% its surface.
This distribution is needed for a better sorting operated with the air in the next step.
The exit or discharge point of the material from the conveyor is adjustable over the two axes, to better define the "ballistic curve" of the material.
Belt speed is controlled by an inverter.
Air knife
The material falling from the conveyor passes through a sharp variable prevalence air knife. The blowing of air in the material flow allows to exploit its inertia.
The light materials is forced by the air flow on or over the rotating drum, while the heavier materials fall after hitting the drum, being collected on a conveyor.
The sorting of metals out of the heavy fraction is made easier by the absence of plastics.
The light fraction is forced over the drum, rotating in the same direction of the material flow to easy the passage of the material, and falls on another conveyor.
Rotating drum
The rotating drum is made with a perforated sheet. Air is sucked in, thus creating a depression on its surface. The light and ductile fraction (film, paper, ...) gets sucked and cling to the metal plate; once passed the top of the drum a special 'breaking off “ device removes the material from the drum’s surface.
Dust collection hood (optional)
Dust is aspired through a suction hood and sent for collection in a bag filter. Usually the air volume to be treated ranges from 6000 to 9000 m3/h
