Wood Pellet Mill

Wood pellet mill is special equipment for processing wood pellets. It can use agricultural and forestry waste of different types, shapes, sizes and moisture contents as raw materials. It can realize pellet processing of one or more materials. The world’s most popular modern pelletizer, the ring die wood pellet mill, is going through an evolution.

The ring die pellet mill is the key component in a complete biomass pellet plant. It is mostly used to process wood materials like wood chips, sawdust, tree branches, logs, and so on, so it is a kind of large-scale wood pellet maker. Also, it can process other raw materials like palm fiber, sugarcane bagasse, peanut shells, corn stalks, wheat straw, and many other agro-wastes.

The raw materials used in wood pellets processing mainly come from by-products of forestry and wood processing industries or energy forests planted specifically, including direct forestry raw materials (sawdust, wood chips, Forest residues), wood industry by-products (Shavings, Off-cuts, Plywood/MDF waste), energy forests and fast-growing tree species (Willow, Poplar, Eucalyptus, Pine, Spruce), agricultural waste (corn stalks, rice husks, sugarcane bagasse, peanut shells, sunflower shells, Palm kernel shells, olive branches, grapevines, etc.), recycled wood (construction waste wood, pallets, packaging boxes, park branches, shrub prunings), etc.

As can be seen from the above, the raw materials of wood pellets are mainly forestry and wood processing residues, supplemented by energy forests and agricultural waste. You can use a single raw material or multiple raw materials at the same time. When selecting raw materials, cost, sustainability, combustion efficiency and local resource endowment should be comprehensively considered.

The wood pellet mill is mainly composed of a feed port, a compression chamber, a discharge port and an electrical control system. Among them, the compression chamber is the core part of the granulator. It is composed of multiple compression molds and can compress waste wood materials such as sawdust into pellets. The quality and quantity of compression molds are important factors affecting the performance of the wood pellet mill machine.

With the gravity power, the centrifugal force generated by the rotation of the ring die, and the feeding scraper, the steam conditioned powder materials will be evenly fed into the two pressing areas in the ring die, which is a wedge-shaped space formed by the ring die and the two rollers.

Under the strong pressure between the ring die and the pressing rollers, the materials are gradually compacted, squeezed into the die hole of the ring die and formed to pellets in the die hole.

Because the extrusion of the material between the die and the roller is continuous, the formed material is continuously discharged from the die hole in the shape of a column, and then cut by the cutter into particles with the required length.

Wood pellets are produced in a pelletizing chamber, which mainly comprises a ring die, rollers, feeding scraper, and cutter. Please refer to the following information for the processing steps of a ring die wood pellet mill:

1. Crushed and dried raw materials are sent into two pelletizing zones through the die cover and feeding scraper.
2. When the ring die is driven to rotate by the hollow shaft driving wheels, the materials that have been fed in are drawn into the space between the die and rollers.
3. After undergoing repeated friction and the pressing force of the die and rollers, the raw materials are reshaped and extruded out through the ring die.
4. The molded pellets are then cut into the required size by the cutter and discharged from the ring die wood pelleting machine.

Wood pellet mill machiness are mainly used to process various wood-based pellets. The processed pellets are mainly used as fuel (replacing traditional energy sources such as coal and natural gas), animal litter (cat litter, litter for stables and poultry farms), industrial raw materials (activated carbon, cellulosic ethanol, etc.), home fireplace fuel, barbecue charcoal substitutes, etc.

Generally speaking, the following customers will invest in wood pellet mill and wood peleltizing systems:

• Wood processing and forestry enterprises: sawmills, furniture factories, plywood factories, paper mills and other wood processing enterprises.
• Biomass energy producers: energy companies, power stations, rural cooperatives, family workshops, etc.
• Agriculture and breeding operators: large farms (such as dairy farms, chicken farms), equestrian clubs, pet bedding suppliers, cat litter companies, pet supplies companies, etc.
• Industrial boilers and heating companies: food processing plants, textile mills and other industrial enterprises that require a stable heat source. Regional heating companies (such as central heating systems)
• Others: households and small users, governments and non-profit organizations, traders and exporters, scientific research institutions and universities, etc.