Torrefieringsmetod innefattande att torrefieringsreaktionen kyls för att åtminstone delvis motverka en temperaturhöjning

摘要

The invention relates to a method and an arrangement for torrefaction of a biomass. Said method and arrangements allows for precise control of torrefaction temperature, which is crucial for accurate control of the quality and properties of the torrefied material. The method comprising a step of cooling the torrefaction reaction so as to at least partly counteract a temperature increase derived from the exothermic torrefaction reactions