Wood pellets (granules) are made of sawdust, spill and other waste of a woodworking. The raw materials (sawdust, bark etc.) come to a crusher where they are crushed to flour. The received mass comes to the dryer; from where it goes to the press granulator, where wood flour is compressed in granules. Compression during pressing increases material temperature, from wood particles pitch, which begins to boil and sticks them together in dense cylinders, is emitted. On production of one ton of granules are consumed 4—5 cubic meters wooden waste. Prepared granules are cooled, packed and delivered to the consumer. Fuel granules are environmentally friendly fuel with the content of ashes no more than 1,5%. The same amount of CO2 is emitted into the atmosphere during the granules burning process as it was absorbed by growing plants. Fuel granules differ from usual wood in high dryness (8 — 12% of moisture against 30 — 50% in firewood). Density is approximately more by one and a half time. These qualities provide high calorific ability in comparison with spill or firewood. At combustion of ton of granules (pellet) about 5 thousand kWh of warmth are allocated which is one and a half times more, than at usual firewood.
Fuel granules are divided into industrial (gray) and domestic (light).
Domestic fuel granules (light) are used for house heating by burning in small coppers (wood pellet boilers), furnaces and fireplaces. They are mostly with a diameter of 6-8 mm and less than 50 mm long, with content of ashes to 0,5%, are packed up in sacks of 15-30 kg, also are laid on the pallet or in sacks (big-bag) of 800-1000 kg.
Industrial fuel granules (dark) with content of ashes to 1,5% are burned in coppers of bigger capacity for the purpose of receipt of heat and the electric power for settlements and industrial enterprises. Industrial granules can have bigger diameter. Granules are shipped by rail transport (hoppers) in bulk in lots on 50 tons on the terms of DAF – border RB or motor transport in sacks (big-bag) of 800-100 kg on the terms of FCA – a warehouse of the Seller.
Pellets are pressed sawdust, which are pressed cylinders with a diameter of 5-10 mm, 20-50 mm long. Pellets are processed from the dried-up waste of woodworking production: wood flour, shaving, bark, knots, branches, etc.
Energy content of hundred kilograms pellets corresponds to 5 liters of liquid fuel.
In addition to the main benefits of pellets, costs and automatic giving, there exists still a number of pluses of using pellet as fuels:
1) Convenience during the transporting and storage.
2) Convenience of pellet’s application.
5) Ecological component.