Method and system for treating biomass material
AssigneeValmet Corporation
InventorFrancois LAMBERT
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Abstract
Method for treating biomass material, comprising impregnating (201) the biomass material with sulfur dioxide and/or sulfurous acid in an impregnation reactor, subjecting the biomass material to hydrothermal treatment (202) in a pretreatment reactor, and determining (204) a flow, or a parameter indicative of a flow, of gases vented off from an upper portion of the pretreatment reactor The method further comprises controlling (205a, 205b) the impregnating based on the flow of gases, or the parameter indicative of the flow of gases. A corresponding system is also provided.
Claims21
A method for treating biomass material, comprising:
- impregnating the biomass material with sulfur dioxide and/or sulfurous acid in an impregnation reactor;
- after said impregnating, subjecting the biomass material to hydrothermal treatment in a pretreatment reactor;
- and
- determining a flow of gases vented off from an upper portion of the pretreatment reactor;
- wherein said impregnating is controlled based on said flow of gases.
A system for treating biomass material comprising:
- an impregnation reactor configured to receive the biomass material, the impregnation reactor comprising an inlet configured to receive sulfur dioxide and/or sulfurous acid for impregnation of the biomass material;
- a pretreatment reactor configured to receive impregnated biomass material from the impregnation reactor for hydrothermal treatment, the pretreatment reactor being a valve for determining a flow of gases emitted from an upper portion of the pretreatment reactor;
- and
- a control system configured to control said impregnation reactor based on said flow of gases.
Dependencies are inferred from the claim text.