Clean, controlled process air
What turns a flame into a usable process.
The hot-air generator takes heat from the biomass burner and transfers it — indirectly — into a clean air stream at a precise, stable temperature. The word doing the work is indirectly: combustion products never contact the air that touches your product. For food applications this is not a refinement, it is the requirement.
System architecture
- Double-chamber design — the main chamber receives the burner flame; the bottom chamber collects ash.
- Three-pass heat exchange — flue gas traverses the exchanger three times before exhaust, extracting substantially more heat than single-pass and delivering transfer efficiency above 80%.
- Twin blowers — 2 × 15 HP, dynamically balanced, running at 2,800 rpm.
- PLC control panel — blower sequencing, temperature regulation and interlocking.
- Dual-fuel chamber option — accepts the cashew-shell burner flame, with provision for direct biomass firing using material such as dried mango skins.
Technical specifications
| Thermal capacity | 200,000–900,000 kcal (matched to burner) |
| Airflow | 2,500–3,000 m³/hour |
| Temperature range | 50–150 °C, controlled |
| Heat-transfer efficiency | above 80% |
| Static pressure | 250 Pa |
| Blowers | 2 × 15 HP Crompton Greaves, dynamically balanced |
| Construction | High-grade steel, three-pass configuration |
Dynamic balancing is worth understanding. At 2,800 rpm an unbalanced impeller destroys its own bearings, transmits vibration into ducting and joints, and generates noise. Balanced assemblies are the difference between a blower that runs for years and one that becomes a recurring maintenance line item.
Air distribution & filtration
- MS ducting — 3 mm mild steel, leak-proof welded joints, fabricated to SMACNA standard, two coats of anti-rust paint.
- Thermal insulation — 80 mm rockwool at 65 ± 3 kg/m³, chicken-wire mesh and 24G aluminium cladding, fire-rated Class 1 to BS 476 Part 6:1989.
- Volume-control dampers — 3 mm MS, opposed-blade, on fire-rated bushes, for precise flow balancing to each branch.
- MERV 8 filtration — 610 × 610 mm panels at the blower inlet, capturing particles from 3.0 to 10.0 microns.
Configure for your process
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Pairs directly with our tunnel dryers and batch units, or integrates into existing process-heat installations.
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