Pellets are a deeply processed and environmentally friendly type of fuel, they are pressed wood waste of a cylindrical shape with a diameter of 6-8 millimeters. Raw materials (sawdust, wood chips, etc.) enter the crusher, where they are ground to a state of flour.
The resulting mass goes to the dryer, from it to the pellet mill, where wood flour is compressed into granules. Compression during pressing increases the temperature of the material, the lignin contained in the wood softens and sticks particles into dense cylinders. The production of one ton of granules takes 2.2 dense cubic meters of raw materials (wood chips, sawdust). Finished granules are cooled, packaged in various packaging – from small bags (2-20 kg) to big bags (large industrial packaging) weighing 1 ton – or delivered to the consumer in bulk.
Fuel granules – environmentally friendly fuel with ash content, as a rule, not more than 1.5%. Pellet production mainly uses sawmill waste, which was previously mainly exported to landfills and rot, and after several years they began to burn or smolder. The pellet plant in Veliky Ustyug is designed to produce 50 thousand tons pellets per year.