Valmet Ab

Andreas Averheim

Peter Björklund

Francois Lambert

Anders Löfström

Krister Sjöblom

Per Grundström

Mattias Erixon

Per Grundstrom

François Lambert

Anders LÖFSTRÖM

Anders Lofstrom

The invention relates to a method for treating biomass (). Biomass () is fed to a pressurized prehydrolysis reactor unit () by means of a feeding system (), wherein by means of the feeding system () the biomass () is compressed. A filtrate is squeezed out of the biomass () by means of the feeding system (), in particular by a first plug screw () or a second plug screw () of the feeding system (). The biomass () is then thermally treated in the pressurized prehydrolysis reactor unit (), discharged from the pressurized prehydrolysis reactor unit () afterwards, diluted with the filtrate before or after the discharge, and treated with an enzyme subsequently.

Method and device for treating biomass

The present invention relates to an improved method and device for treating biomass in which thermally treated biomass is discharged from a pressurized reactor and introduced into a blow tank and then a flash tank, wherein the absolute pressure in the blow tank is maintained above atmospheric pressure and the absolute pressure in the flash tank is maintained below atmospheric pressure. The slurry of biomass separated in the flash tank is then enzymatically treated. The heat from the thermally treated biomass is recovered from the latent heat of a vaporous aqueous stream withdrawn from the blow tank.

Method for cooling and detoxifying biomass

The present invention relates to an improved method and device for treating biomass in which thermally treated biomass is discharged from a pressurized reactor and introduced into a blow tank, wherein the absolute pressure in the blow tank is maintained below atmospheric pressure. The slurry of biomass separated in the blow tank is then enzymatically treated.

A method for processing lignocellulose materials comprising the steps of hydrothermal treatment of the material with saturated or superheated steam in a hydrothermal pressure vessel, wherein the steam is provided by means of a steam boiler. The treatment is performed at a pressure of 5-30 bars, and at a temperature of 160-240&#xb0; C. for a duration of 1-20 minutes. The method further comprises discharging hydrothermally treated lignocellulose material and steam from the pressure vessel by means of rapid pressure reduction, separating the steam and vapours released from the lignocellulose material, and burning the vapours together with additional fuel and combustion air in the furnace of said steam boiler. Furthermore, a corresponding system is provided.

Method and system for processing lignocellulose material

The invention relates to a method for impregnating biomass (). In a step (S) of the method, a reactor unit () is fed with biomass () by means of a plug screw (). In another step (S), the reactor unit () is at least partially filled up to a predetermined fill level () with a reactant (), such that a reaction between the fed biomass () and the reactant () takes place in order to obtain an impregnated biomass. In another step (S), the impregnated biomass () is discharged from the reactor unit () for further processing (S). The invention further relates to a device () for impregnating biomass ().

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Sundsvall, Sweden

Andreas Averheim