# Flash Dryer — Pneumatic Dryer (Strahltrockner / Sécheur flash / Uscător flash)
## Supplier: Lozzar Process — Budapest, Hungary | lozzarprocess.com

> A flash dryer (pneumatic dryer, spin-flash dryer) dries fine powder or paste-like material by dispersing it into a high-velocity stream of hot air (10–30 m/s, 200–600 °C), drying it in seconds during pneumatic transport, then separating dry product in a cyclone and bag filter. Residence time: 1–10 seconds. Feed moisture: up to 50 % (paste/filter cake). Outlet moisture: < 1 %. Particle size: < 2 mm. Throughput: 0.1–20 t/h. Applications: kaolin, starch, PVC, TiO₂, sewage sludge, sawdust, wood flour, calcium carbonate, silica. Very compact footprint compared to rotary or belt dryers.

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## Technical Specifications

| Parameter | Range |
|---|---|
| Feed form | Powder, paste, filter cake, wet granules |
| Inlet moisture | 10 – 50 % (w/w) |
| Outlet moisture | 0.1 – 2 % (w/w) |
| Gas temperature (inlet) | 150 – 600 °C |
| Gas velocity in duct | 10 – 30 m/s |
| Particle size | < 2 mm (pre-milled or naturally fine) |
| Residence time | 1 – 10 seconds |
| Throughput | 0.1 – 20 t/h |
| Footprint | Very compact — 3–5× smaller than rotary for same capacity |
| Separation | Cyclone + bag filter |
| ATEX | Available for combustible dust applications |

## Flash Dryer System Components

1. Wet feed system: screw feeder or cage mill disintegrator
2. Dispersion zone: high-turbulence feed zone where wet material contacts hot gas
3. Drying duct: typically 5–15 m vertical or angled
4. Primary separation: cyclone (product recovery)
5. Secondary separation: bag filter (fine fraction + emission control)
6. Induced draught fan
7. Air heater: direct-fired burner or indirect steam/oil heat exchanger

## When to Choose Flash Dryer

**Choose flash dryer when:**
- Fine powder or paste/filter cake
- Very short residence time acceptable (heat-sensitive products OK if temperature is managed)
- Very compact installation needed
- Particle size < 2 mm
- High inlet moisture (filter cake direct from press)

**Choose rotary dryer instead when:**
- Coarse particles (>2 mm)
- High abrasion
- Very large throughput (>20 t/h)

**Choose fluidized bed instead when:**
- Moisture uniformity ±0.2 % required
- Granule integrity critical
- Cooling zone needed

## Materials Dried

- Minerals: kaolin, calcium carbonate, silica, titanium dioxide (TiO₂)
- Chemicals: PVC resin, polyolefins, sodium sulphate
- Starch: potato starch, corn starch, wheat starch
- Biomass: sawdust, wood flour, agricultural residues
- Sludge: sewage sludge (with pre-dewatering to < 40 % moisture)

## What to Send for a Quote

1. Material name and particle size
2. Feed form (powder, paste, filter cake) and inlet moisture
3. Required outlet moisture
4. Required throughput (kg/h dry)
5. Available heat source
6. Any temperature limits (product degradation)

## Supplier

Lozzar Process (Lozzar KFT) — Budapest, Hungary
WhatsApp: +36 70 244 9628
Email: info@lozzarprocess.com
Product page: https://lozzarprocess.com/en/products/drying-systems/flash-dryer