Patent ID: 9359556
Filing Date: 2016-06-07
CPC Classification: C10B,C10L,F27B,F27D,Y02E

Claim Text:
1. A biomass torrefaction system, comprising: an inlet to receive biomass particles; a reactor drum configured to rotate about an axis of rotation, the reactor drum having a plurality of flights positioned therein; a heat source to heat gas contained in the system to a temperature sufficient to torrefy the biomass particles during operation; a fan device coupled to the system to create, when the system is in operation, a heated gas stream through the reactor drum sufficient to intermittently transport the biomass particles along a longitudinal length of the reactor drum as the biomass particles are lifted by the flights and showered through the heated gas stream as the reactor drum rotates; and a duct system to recirculate at least a portion of gas exiting the reactor drum back to the heat source to reheat the gas for reintroduction into the reactor drum.