Air Flow Dryer

A sawdust air flow dryer is a drying equipment used to dry wood sawdust, rice husk, crushed wood shavings, branches, wood chips and other biomass materials (diamater < 3mm, length < 5mm). It is widely used in the biomass energy industry, wood processing plants, and other industries that require drying of biomass materials.

This air flow dryer is composed of a fan, a heating source, a drying pipe, and a cyclone separator. The sawdust or wood chips are fed into the drying pipe, where they are exposed to the hot air. The moisture evaporates and is carried away by air, while the dry material is discharged from the other end of the pipe. The cyclone separator is used to separate the dry material from the air and collect the dust.

The dried sawdust can then be used for various purposes, such as fuel, animal bedding, or as a raw material for the production of biomass briquettes, particleboard and other wood-based products.

Step 1: Crush the wood material to certain size with a crusher

STEP 2: Dry the wood sawdust to certain humidity with a dryer

STEP 3: Compress the wood sawdust to certain shape with a briquette machine

Step 4: Carbonize the sawdust briquettes to charcoal briquettes with a carbonization furnace

Drying efficiency: when the hot air is 180 ℃, dry the sawdust or rice husk with a relative humidity of 35% to 10%. The contact time between materials and hot air is extremely short, and the drying time is generally between 0.5 and 5 seconds, so higher drying temperatures can be used.

Fuel options: wood, coal, steam, or electric heating.

The airflow dryer has a simple structure, small footprint, and low investment and maintenance costs.