FIELD: process engineering.
SUBSTANCE: invention relates to the method of producing fuel granules from biological materials, primarily, from wood shaving, wood etc., differing in that the material is fed to drying stage (1) for it to be dried to relative moisture content of 40-65% to 30-45% by weight. Then the material is fed from drying stage (1), via, possible, intermediate stage of storage (2) to reactor stage (3, 3') for material to be treated at higher pressure and heating to 200 to 300°C with the help of steam. Material is cured in the reactor at reached temperature for time sufficient for softening of the material. Pressure at aforesaid reactor stage is reduced in at least two stages. Note here that aforesaid first pressure reduction stage is intended for separating the material into fibers and extracting lignine, while the second pressure reduction stage is undertaken to feed the material from the reactor stage to that of additional drying, possibly, via intermediate stage of storage. Now the material is pelletised.
EFFECT: ruling out granule destruction with no additives and at lower power consumption.
4 cl, 2 dwg
