Wood boiler fuel pellets have a core zone or peripheral zone which is of greater density than another part of the pellet

摘要

An assembly converts sawdust, wood chips and other wood residues into uniform pellets for subsequent use as boiler fuel. Also claimed are pellets which are spherical, ellipsoid or cylindrical and formed by compression. The pellet has esp. a core zone or a peripheral zone with a higher material density than another zone within the pellet.