Complete Wood Pellet Plants

Flow Chart:

The medium- and large-sized wood pellet plants usually include a wood chipper, crusher, dryer, hot blast stove, screw conveyor, mill, cooler, sieve, packing machine with sealer, and a conveyor. The entire process can be divided into four parts.

1. Crushing System
The pellet plant's crushing system includes the wood chipper and hammer mill, each selected according to the size of the raw materials. The wood chipper is used to cut logs into wood chips of manageable size before sending the raw material to the hammer mill.

2. Drying System
15 percent is the best moisture content of the raw material prior to pelletization. For wood pellet plants with capacity greater than 1 ton per hour, a rotary dryer is suggested. The rotary dryer is paired with a hot blast stove to provide hot air for the rotary drum.

3. Pelletization and Cooling
This is the pellet line's key station, where the pellets are created. Dies can be interchanged to create pellets of different sizes. A gear drive or a belt drive can be utilized to drive the machinery.

Just after production, wood pellets are typically between 60 and 80 degrees Celsius with a moisture content of around 15 percent. A cooler is used to reduce the temperature and to bring the moisture content down to 3-4 percent.

4. Sieving and Packing
The sieve is used to separate high quality wood pellets from broken pieces. The packing machine then seals the pellets in plastic bags for convenient storage.