Method and apparatus for torrefaction of biomass with a cyclonic bed reactor
First Claim
1. A system for pre-conditioning of biomass for subsequent torrefaction of the biomass comprising:
- at least one burner producing combustion gases;
a feed screw unit having an inlet configured for receiving the biomass, an outlet configured for outletting the biomass, a feed screw configured for displacing the biomass from the inlet to the outlet, and at least one sealed valve at the inlet for sealing the feed screw unit from an exterior of the feed screw unit and into the feed screw unit, the feed screw unit being sealed from the inlet to the outlet;
a sleeve surrounding at least part of the feed screw unit, the sleeve being in heat exchange relation with the feed screw unit;
a pneumatic circuit receiving combustion gases from the at least one burner, the pneumatic circuit connected to an inlet of the sleeve for directing combustion gases therein to heat the biomass in the feed screw unit by indirect contact via the heat exchange relation, the pneumatic circuit having a pipe section extending from the outlet of the feed screw unit to a torrefaction reactor with combustion gases flowing from the outlet of the feed screw unit to the torrefaction reactor to convey the biomass and the combustion gases to the torrefaction reactor.
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Accused Products
Abstract
A system for pre-conditioning of biomass for subsequent torrefaction of the biomass comprises a burner producing combustion gases. A feed screw unit has an inlet for receiving the biomass, an outlet for outletting the biomass, and a feed screw for displacing the biomass from the inlet to the outlet. A sleeve surrounds and is in heat exchange relation with at least part of the feed screw unit. A pneumatic circuit receives combustion gases from the burner, the pneumatic circuit connected to an inlet of the sleeve for directing combustion gases therein to heat the biomass by indirect contact via the heat exchange relation, the pneumatic circuit having a pipe section extending from the outlet of the feed screw unit to a torrefaction reactor with combustion gases flowing from the outlet of the sleeve to the torrefaction reactor to convey the biomass and the combustion gases to the torrefaction reactor.
8 Citations
15 Claims
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1. A system for pre-conditioning of biomass for subsequent torrefaction of the biomass comprising:
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at least one burner producing combustion gases; a feed screw unit having an inlet configured for receiving the biomass, an outlet configured for outletting the biomass, a feed screw configured for displacing the biomass from the inlet to the outlet, and at least one sealed valve at the inlet for sealing the feed screw unit from an exterior of the feed screw unit and into the feed screw unit, the feed screw unit being sealed from the inlet to the outlet; a sleeve surrounding at least part of the feed screw unit, the sleeve being in heat exchange relation with the feed screw unit; a pneumatic circuit receiving combustion gases from the at least one burner, the pneumatic circuit connected to an inlet of the sleeve for directing combustion gases therein to heat the biomass in the feed screw unit by indirect contact via the heat exchange relation, the pneumatic circuit having a pipe section extending from the outlet of the feed screw unit to a torrefaction reactor with combustion gases flowing from the outlet of the feed screw unit to the torrefaction reactor to convey the biomass and the combustion gases to the torrefaction reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification