Sawdust Rotary Dryer

Advantage and Features

  • New structure sawdust rotary dryer or wood chips dryer by Palet Machinery is specially designed for drying the wood chips and sawdust.
  • The drying system is equipped with a three-ring drum dryer and adopts a high temperature rapid drying process to increase the drying strength.
  • It improves thermal efficiency, reduces the installed capacity and covers an area, and ensures the product quality.
  • Equipped with water on-line inspection and automatic control of final water not only ensures the quality of products but also greatly reduces the labor intensity of workers.
  • It is equipped with automatic fire and explosion-proof devices to ensure the safety of production.

sawdust rotary dryer

Table of Contents

Sawdust dryer specification and parameter

wood chips dryer
ModelSpecification (m)Capacity(kg/h)Rotate speed(r/min)Power(kw)Size(m)

Introduction of sawdust rotary dryer (wood chips dryer)

Sawdust rotary dryer or wood chips dryer is widely used to dry humidity granularity materials in the biomass industries.  It is an important part of the pellet plant, and the quality of the material has an impact on pelletizing with pellet mill. Sawdust and wood chips should be dried to5-10% water content to meet the demands for pelletizer. It is different from the sawdust flash dryer.

sawdust rotary dryer flow chart
1elevator5pipe9palm fiber dryer
2hot air furnace6scew10draft fan
3draft fan7wind closing device11cyclone
4chimney8feeding conveyor12discharging conveyor

The Principle of sawdust dryer :

The appearance of the drum is the same as that of the general roraty drum dryer, but the interior is made of three straight cylinder sets with different diameters, forming a three-ring roller, all surfaces in contact with the material are equipped with a copy plate. The three-layer rollers are fixed to each other in the radial direction to rotate at the same number of revolutions.

The direction of the material is: wet material from the inner tube into, from the end of the re-entry into the middle tube, after the middle tube into the outer tube, the end of the outer tube discharge.

principle of sawdust rotary dryer

Sawdust and wood chips drying process

Step 1: The wood chips or sawdust enters the belt conveyer through the feeding hopper, the equal thickness material flow enters the dryer feed port through the feeding shut-off fan.
Step 2: The high temperature hot flue gas from the hot blast furnace is in full contact with the dryer feeding mouth and enters the multi-ring roller dryer together, the wet sawdust or the wet wood chips is dried through the mass heat exchange of three strokes.

Step 3: The wood chips orsawdust after drying enters the multi-group cyclone separator, the dry material is discharged through the discharge shut-off fan, the part enters the blocking system to squeeze into the blocking block, the finished product.

Step 4: The other part of the material enters the anti-fuel plugging feeding device through the fuel feeding fan, and the function of the cyclone to strengthen the combustion fan to complete the combustion burning and form the high height warm flue gas, used as a heat source for the whole drying system. And the tail gas from the cyclone collector goes into the atmosphere.

Sawdust dryer applications

Suitable materialwood chips、sawdust、grass、alfalfa、chicken manure、waste of wood、rice hull、palm fiber、coconut shell、pks、opf、bamboo、couch grass、corn and sorghum stalks、wheat straw,etc.
application industrypaper making industry、wood powder making machine、wood pellet plant、boiler heating、BBQ heating、wood chip dryer、biomass indusrty,etc.

Structure of rotary dryer(pictures)

the inner structure of sawdust rotary dryer

the inner structure of sawdust rotary dryer

the middle structure of sawdust dryer

the middle structure of sawdust dryer

feeding machine of sawdust dryer

feeding machine of wood chips dryer

hot air furnace

hot air furnace of wood chips dryer

Sawdust dryer video

For detail and price of sawdust rotary dryer , please refer to:


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