FIELD: forestry.
SUBSTANCE: invention can be used in timber industry for processing wood wastes. Wood raw material torrefication method includes a wood raw material drying step, a torrefication and cooling step. Wood raw material is loaded into drums 5, which roll down by gravity along inclined guides 4, rotating around their axis, and successively move through drying zone, torrefication zone and cooling zone of reactor for wood raw material torrefication. Logging wastes are used as wood raw material. Heat carrier for drying and torrefication from furnace boilers 14, 15 is supplied to outer surface of drums 5 and into cavity of drums 5 through perforated pipes installed along axis of drums 5. Pyrolysis gases and steam are discharged from drum cavity by through holes of perforated pipes and are discharged together with furnace gases through stack 10.
EFFECT: disclosed method ensures high quality of the end product while reducing power consumption.
5 cl, 2 tbl, 11 dwg
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