Drying Plants

Grinding plants are able to grind wood chips and other coarse biomass materials up to 45% moisture with specifications as shown in the table below.


Drying plant consists of the following equipment:

  • Fine biomass screw conveyor which feeds the material into dryer;
  • Hot air generator unit with cyclonic burner which burns efficiently a part of the same fine biomass blown from fuel bin into combustion chamber;
  • 1-pass or 3-pass rotary dryer. Dried material is sucked in by a pneumatic conveying system and transported to cyclone to separate the material from the conveying air;
  • The dried material is discharged from cyclone through a rotary air lock into one or two silo bins from which the material is fed into briquetting presses.

One- / Three-pass Rotary Dryer Specifications

Capacity (ton/h)
Evaporation, kg/h
Fuel consumption a), kg/h
Diameter (mm)
Length, mm
0.5 290 84 800/- 8,000/-
1 582 167 1,200/1,700 12,000/8,000
2 1,164 333 1,600/2,450 11,500/8,000
3 1,746 500 1,600/2,650 15,000/9,100
4 2,328 665 2,000/2,850 16,000/9,000
5 2,910 920 2,000/3,700 20,000/10,000

a ) For wood sawdust with LHV = 2,635 kCal/kg