METHOD OF CHARCOAL PRODUCTION Russian patent published in 2012 - IPC C10B53/02 

FIELD: woodworking industry.

SUBSTANCE: wood before drying is conductively heated at a wall temperature of 95÷105°C due to condensation of water vapor coming from the cooling zone (8), and dried by convection with flue gas of temperature 240÷250°C with heating of the wood up to 180°C. Part of wet flue gas of temperature 150°C from the drying zone (3) is ejected through an absorber (4) to the atmosphere, the other part is mixed with flue gas of temperature 600°C from the pyrolysis zone (5) and sent to the drying zone (3). Dried wood is pyrolysed by conduction supply of heat from flue gas coming from the furnace (7) and having the temperature 600÷700°C in the counter flow mode. Pyrogas formed in the pyrolysis zone (5) is ejected with pyrogas condensed in the condenser (6), uncondensed pyrogas is discharged into the furnace (7), where air is supplied, and refrigerant of pyrogas in the furnace (7) is converted into steam. Carbon residue with a temperature of 500°C is conductively cooled to 120°C with water condensate coming from the heating zone (1), then is additionally conductively cooled in the counter-flow mode up to 50°C with the recirculating absorbent.

EFFECT: method enables to improve the efficiency of the pyrolysis process.

1 dwg, 1 ex