TST Zig-Zag Air Shifter (ZZS350/1600)

Air Classification & Cleaning System

Equipment Description

The TST Zig-Zag Air Shifter (ZZS) is a closed-loop air separation and cleaning system designed to separate bulk materials according to their specific weight (density). Using controlled upward airflow within a multi-stage zig-zag separation channel, the system efficiently removes light contaminants from heavier material fractions in a fully dry process.

Operating Principle

Material is fed into the zig-zag separation channel via a rotary airlock. An adjustable upward airflow counteracts gravity, causing light particles to be lifted and extracted, while heavier particles fall downward and are discharged separately. The zig-zag geometry repeatedly re-classifies material, improving separation accuracy. Process air is cleaned and recirculated in a closed-loop circuit.

System Components

• Feed Rotary Valve
  Ensures controlled, continuous material feed and maintains airlock between system and upstream equipment.
• Zig-Zag Separation Channel
  Primary density-based sorting chamber; multi-stage design maximizes air–material interaction and separation efficiency.
• Blower / Fan System
  Generates adjustable upward airflow; typically equipped with variable frequency drive (VFD) for precise control.
• Cyclone or Dust Extraction Unit
  Separates light fraction, dust, and fines from the air stream; cleans air before recirculation.

• Control Panel
  Centralized control of airflow, fan speed, operating parameters, and maintenance functions.

Typical Technical Data (Indicative – depends on material and configuration)

• Separation principle: Air classification by density
• Process type: Dry, closed-loop air system
• Throughput range: Project-specific (typically several t/h)
• Air volume: Adjustable via fan and control system
• Cut point: Adjustable via airflow and feed rate
• Installation: Vertical or semi-mobile configuration

Key Advantages

• Dry separation – no water consumption
• Efficient removal of light contaminants (film, paper, dust, organics)
• Closed-loop airflow reduces dust emissions and energy loss
• Adjustable separation performance for different materials
• Robust industrial design for continuous operation

Typical Applications

• Recycling and waste processing
• Glass cleaning and cullet preparation
• RDF / SRF and shredder residue treatment
• Plastic, packaging, and film separation
• Bulk material and mineral cleaning

• C&D Waste
• Glass Recycling
• Plastics
• PVC
• RDF/SRF
• Scrap Metal
• Waste Fines

• Glass Recycling Plants
• Plastics Recycling
• Recycling Plants
• Scrap Metal
• Waste to Energy