Wood Pellet Mill

1. Particle size affects pellet quality, energy consumption and productivity
2.Moisture content can reduce or increase energy consumption
3. Moisture content also affects pellet quality, mechanical durability and combustion results
4. Lignin type and percentage effects pellet quality, pellet mill lubrication and productivity
5. Material density impacts on process temperatures and resistance through the die

Lignin (sometimes "lignen") is a complex chemical compound most commonly derived from wood and an integral part of the cell walls of plants. The term was introduced in 1819 by de Candolle and is derived from the Latin word lignum, meaning wood. It is one of the most abundant organic polymers on Earth, superseded only by cellulose, employing 30% of non-fossil organic carbon and constituting from a quarter to a third of the dry mass of wood. The compound has several unusual properties as a biopolymer, not least its heterogeneity in lacking a defined primary structure.

In the production of pellet briquetting, when natural materials such as sawdust are compressed as in the pellet mill, the pressure plus the heat caused by the milling produces a natural substance called lignin. This makes the pellets hold together. However, depending on how dry the material is, additional moisture may have to be added as you make pellets. This may be as simple as spray the material with a little water, There are also all natural binders on the market that can be added to the material you're pelletizing.

Lignins are derived from an abundant and renewable resource: trees, plants, and agricultural crops. Lignins are nontoxic and extremely versatile in performance, qualities that have made them increasingly important in many industrial applications.

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