System

The three pass rotary drum wood chip dryer adopts three layers of stacked drums and combines countercurrent and cocurrent drying technology to achieve efficient and uniform drying of the wood chips, Maximizing thermal efficiency. 

Brief Workflow

1. Material Feed and High-temperature Hot Air
Wet wood chips are fed by the feeder, and high-temperature hot air enters from the discharge end in a reverse flow.

2. Three-Pass Drying
First Pass (outer drum, countercurrent): The wood chips encounter the high-temperature hot air, evaporating water rapidly.
Second Pass (middle channel, countercurrent): Semi-dry wood chips continue to move in a reverse flow for stable dehydration.
Third Pass (inner channel, cocurrent): Nearly dry wood chips come into contact with the low-temperature exhaust gas in a cocurrent flow,  drying slowly to prevent over-drying.

3. Discharge and Dust Removal
Dried wood chips are discharged from the discharge end, and the low-temperature exhaust gas is purified and dusted before being discharged.