Abstract

In a process for the treatment of biomass, the moisture content of the biomass feedstock is reduced, if necessary, to less than 12%; the dried feedstock is fed in vacuumed portions to a heat treatment roasting furnace (7) and roasted at heat treatment temperature in the range of 220-300°C, predetermined in function of the target calorific value of the end-product; the end-product is delivered from the roasting furnace (7) to the cooler (8) and cooled to below its ignition temperature, then withdrawn for further utilisation. Before feeding the first portion of the dried feedstock into the roasting furnace (7), the interior of the roasting furnace is evacuated; the gaseous medium generated during roasting is disposed of; and during heat treatment of the feedstock in the roasting furnace (7), the pressure in the roasting furnace (7) is maintained continuously at a pressure exceeding 1.0 bar (a) by no more than 200 mbar(a). The drying air stream (a) used to reduce the moisture content of the raw material is warmed by the heating air stream (e) exiting the roasting furnace (7), the warmed-up cooling medium stream (f) used for cooling the end-product and the heat energy generated by the combustion of the gaseous medium generated during roasting; the cooling medium stream (f) used to cool the end-product is pre-cooled by the drying air stream (a) used to reduce the moisture content of the feedstock. The invention also concerns a device for implementing the biomass treatment method.

IPC Classes  ?

• C10B 31/00 - Charging devices for coke ovens
• C10B 53/02 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
• C10B 47/44 - Other processes in ovens with mechanical conveying means with conveyor-screws
• C10L 9/08 - Treating solid fuels to improve their combustion by heat treatment, e.g. calcining

Goods & Services

Biomass fuel; Biomass briquettes; Wood briquettes; Firewood; Coal; Charcoal; Charcoal briquettes; Fuel in the form of briquettes. Biomass roasting apparatus; Biomass fuel production and processing apparatus; Wood biomass processing and pelletising apparatus. Biomass gasification; Processing and pelletising of wood biomass; Energy production, in particular from biogas plants.