A wood chip dryer is an industrial drying device specifically designed to remove moisture from wood chips, sawdust, shavings, and other wood debris. Its core objective is to transform high-humidity wet wood chips into dried materials with stable moisture content, suitable for subsequent processing or energy utilization, through a controlled thermal process.
Working Principle: Heat Transfer and Moisture Evaporation
Wood chip dryers primarily use direct or indirect heating methods to dry the material. In direct heating, high-temperature hot air (usually from a hot air furnace) comes into full contact with the wet wood chips inside the drum. The hot air transfers heat to the wood chips, causing their internal moisture to evaporate rapidly and be carried away by the airflow. Under the action of the lifting plates inside the drum, the wood chips are continuously lifted and scattered, forming a uniform material curtain, which greatly increases the contact area with the hot air, improving drying efficiency and uniformity. Finally, the dried wood chips are separated from the low-temperature, high-humidity exhaust gas, completing the entire dehydration process.
Core Application Areas
Wood chip dryers have extremely wide applications. First, in biomass pellet fuel production, drying is an essential step before pelleting; appropriate moisture content is crucial for ensuring pellet formation rate and calorific value. Second, in particleboard and medium-density fiberboard (MDF) manufacturing, dried wood chips are the main raw material, and the stability of their moisture content directly affects the quality and mechanical properties of the boards. Furthermore, under strictly purified conditions, dried wood chips are also an important raw material for animal bedding.
