
Wood pellets for heating, is a modern standard fuel, usually wood pellets have a cylindrical shape with a diameter of 4 to 20 mm and length from 10 to 30 mm. For making wood pellets for heating, is most commonly used sawdust, wood chips, and various wastes in
the wood processing companies. Wood pellets for fuel are without a chemical binders, as a binder serves only pitch in the wood. Wood pellets have a very low moisture content of 6-10%. The manufacturing process uses only high pressure and elevated temperature. This reduces the water content and volume, but increases the density. The higher the density the higher the calorific value of wood pellets. In the manufacture of wood pellets for heating is very important that the humidity of the input material is less than 12%. Wood pellets are made from crushed raw material that is compressed by the matrix cylinder through a matrix. Knives trim the
pellets to desired length. In the final stage the pellets are cooled and the result is compact size and hardness of wood pellets.
Standardized wood pellets for heating in Europe must not contain recycled wood or outside contaminants. Recycled materials such as treated or painted wood panels are useless for the production of wood pellets. The combustion could lead to release of harmful emissions and / or to uncontrolled changes in heating properties of wood pellets.
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