Having decided to build a pellet plant, you may wish to know with as much detail as possible what pellet mill components are required. From the very basic, if the plant is going to be a ring die, there will be need of a building to house it and protect it from the elements. Flat die pellets plants are the most compact and self contained and will in most cases be built on a trolley however, for large flat die pellet mills, there may be need of some form of shelter though in this case the plant won’t be very big since the hammer mill can be attached to the pellet machine via a short conveyor.
The next important component as briefly identified above is the hammer mill. This component is responsible for turning the wood, feeds etc into fine powdery chips. Hammer mills come in various types, sizes and shapes depending on the material you wish to pelletize, and they always have their own cyclone. The hammer mill will have a number of important components such as the sieve, which determines the size of the chip to generate. They may also be front-fed or side-fed but most wood and bbq pellet mills have side-fed hammer mills.
The hammer mills also do require a lot of power. This may be obtained from 3-phase motor, a tractor PTO or a leister diesel engine. The power source may also be rigged in such a way that it powers the entire plant ranging from conveyors to the driving the pellet mill. Power may be transmitted using V belts or chain. However belts are recommended since the chain, despite being more durable than the belt, will often heats up during the operation, thus expanding and making it not possible to fit in the gears. The output from the engine could be channeled through a heavy duty gearbox and fed into other pellet mill components.
Having set up the hammer mill, the next step is the drier. The ground wood, bbq or feed chips need to be dried before being pelletized to avoid trapping moisture. Driers come in various sizes and shapes. Other than, the drier’s power consumption should be another factor that a prospective pellet plant owner or pellet plant components retailer should take into consideration. Driers can be powered by electricity, solar or gas but often, this depends on the plants throughput and the location of the plant. One of the most effective drying methods is the heated conveyor belt. This allows the pellet raw product to dry up while being transported to the pellet mill. Another option is a drive through drier which is built around a specialized conveyor.
After drying, steam from the boiler is blown through the material so as to make it soft and pellet able. The boiler is also dependent on the size of the plant. Small plants hardly need a steam source. After pelleting, the next pellet mill components are the cooler and the packager. For large plants such as those with a throughput of 500kg per hour or more, packaging and cooling is very essential. However like the boiler, packaging and cooling components are dependent on the plant size. Before deciding on pellet mill components, it is recommended that you consult as many individuals plant owners and pellet manufacturers and retailers as possible.