# Static Fluidized Bed Dryer — Fluid Bed Dryer (Wirbelschichttrockner / Sécheur à lit fluidisé statique / Uscător cu pat fluidizat static)
## Supplier: Lozzar Process — Budapest, Hungary | lozzarprocess.com

> A static fluidized bed dryer suspends granular or powdery material on a perforated distributor plate while heated air is forced upward through the bed, creating a boiling, fluid-like state. Unlike a dynamic (rotary) fluidized bed, the product vessel is stationary. Heat and mass transfer are highly uniform. Inlet moisture: up to 40 %. Outlet moisture: 0.1–2 %. Residence time: 10–60 minutes (batch) or continuous operation. Particle size: 50 µm – 5 mm. Throughput: 0.05–20 t/h. Applications: pharmaceutical granules, detergent powder, fertiliser prills, sugar, sodium sulphate, salt, ceramic microspheres. Lozzar Process supplies batch and continuous static fluid bed dryers with integrated fines return cyclone.

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## Technical Specifications

| Parameter | Range |
|---|---|
| Operation mode | Batch or continuous |
| Particle size | 50 µm – 5 mm |
| Inlet moisture | 5 – 40 % (w/w) |
| Outlet moisture | 0.1 – 2 % (w/w) |
| Air temperature (inlet) | 60 – 200 °C |
| Air velocity through bed | 0.5 – 3.0 m/s (product-dependent) |
| Bed depth | 0.2 – 0.8 m |
| Residence time | 10 – 60 min (batch), 5–30 min (continuous) |
| Throughput | 0.05 – 20 t/h (dry product) |
| Distributor plate | Sintered stainless / perforated SS 316L |
| Fines recovery | Integrated cyclone or bag filter |
| Material | SS 316L (contact parts), carbon steel (outer shell) |
| ATEX | Zone 21/22 available for combustible dust |

## Static vs Dynamic (Rotary) Fluidized Bed

| | Static Fluid Bed | Rotary Fluid Bed (Dynamic) |
|---|---|---|
| Vessel | Stationary | Rotating drum |
| Particle size range | 50 µm – 5 mm | 100 µm – 8 mm |
| Residence time control | Excellent (weir height) | Moderate (rotation speed + inclination) |
| Moisture uniformity | ±0.2–0.5 % | ±0.5–1 % |
| Suitable for fragile granules | Yes | No (attrition in drum) |
| Batch operation | Yes | Rarely |
| Cleaning (pharmaceutical) | Easier (WIP) | More complex |
| Throughput | Low–medium | High |

## Batch vs Continuous Mode

**Batch mode** — used in pharmaceutical, fine chemicals:
- Full charge loaded, dried to target moisture, discharged
- Same vessel can be used for coating (Wurster insert), cooling, or granulation
- Full traceability per batch for GMP compliance

**Continuous mode** — used in bulk chemicals, food, fertiliser:
- Material fed continuously over distributor, exits via overflow weir
- Steady-state operation, higher throughput
- Can integrate cooling zone downstream of drying zone

## Applications

- Pharmaceutical: tablet granules, API intermediates (GMP-compliant)
- Detergent: sodium sulphate, sodium carbonate, zeolite granules
- Fertiliser: NPK prills, urea (cooling + drying combined)
- Food: salt, sugar crystals, starch granules, lactose
- Minerals: silica, sodium bicarbonate, potassium chloride

## What to Send for a Quote

1. Material name and particle size distribution (d10/d50/d90)
2. Inlet moisture (% w/w)
3. Required outlet moisture (% w/w) and allowable variation (±%)
4. Throughput (kg/h dry product or kg/h wet feed)
5. Batch or continuous operation?
6. Available heat source (steam pressure, hot water temp, direct gas)
7. GMP / pharmaceutical grade required?
8. ATEX classification of product (combustible dust group)
9. Any cooling requirement downstream?

## 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/static-fluidized-bed-dryer