Method and system for processing lignocellulose biomass material
AssigneeValmet Corporation
InventorPeter Björklund
Life of this patent
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Abstract
A method for processing a lignocellulose biomass material with a moisture content below 10 weight-% and an ash content below 1.0 weight-% includes: adding an acid catalyst to the lignocellulose biomass material; after adding the acid catalyst, thermally treating the lignocellulose biomass material with steam at an elevated pressure and an elevated temperature in at least one reactor; discharging the lignocellulose biomass material and blow steam from the at least one reactor using a steam explosion discharge device; and forming pellets and/or briquettes from at least part of the discharged thermally treated lignocellulose biomass material.
Claims16
A method for processing a lignocellulose biomass material, said method comprising:
- adding an acid catalyst to the lignocellulose biomass material while the lignocellulose biomass material has a moisture content below 10 weight-% and an ash content below 1.0 weight-%;
- after adding the acid catalyst, thermally treating the lignocellulose biomass material with steam at a pressure above atmospheric pressure and a temperature above atmospheric temperature in at least one reactor;
- discharging the lignocellulose biomass material and blow steam from the at least one reactor using a steam explosion discharge device;
- and
- forming pellets and/or briquettes from at least part of the discharged thermally treated lignocellulose biomass material.
A system for processing a lignocellulose biomass material, said system comprising:
- a drying arrangement configured to reduce a moisture content of the lignocellulose biomass material to below 10 weight-%;
- a catalyst addition device configured to add an acid catalyst to the lignocellulose biomass material from the drying arrangement while the lignocellulose biomass material has a moisture content below 10 weight-%;
- at least one reactor configured to receive the lignocellulose biomass material with said acid catalyst added, said at least one reactor being provided with means for adding steam into said at least one reactor for thermal treatment of the biomass material at a pressure above atmospheric pressure and a temperature above atmospheric temperature;
- at least one steam explosion discharge device configured to discharge the biomass material and blow steam vapor from the at least one reactor;
- and
- at least one pelleting device configured to receive the lignocellulose biomass material from the at least one steam explosion discharge device and to produce fuel pellets.
Dependencies are inferred from the claim text.