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 The heat from the thermally treated biomass is recovered from the latent heat of a vaporous aqueous stream withdrawn from the blow tank.

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 The heat from the thermally treated biomass is recovered from the latent heat of a vaporous aqueous stream withdrawn from the blow tank.

A ragger (4) for a removal of reject from a pulper (2) in a pulping system (1) has a drawing roll (5) which draws the reject from the pulper (2) in the form of a ragger rope (3). The drawing roll (5) has a drive shaft (6) to which a pulley (7) is mounted and over which the ragger rope passes to a cutter. At least one measuring instrument (14) is mounted with respect to the ragger to measure the quantity and direction of the force applied to the drawing roll by the ragger rope (3) as it is drawn out of the pulper (2). The ragger is part of a pulping system (1) having a pulper (2) for preparation of a fiber pulp suspension and a method for controlling reject handling in the pulping system (1) is provided.

A ragger (4) for a removal of reject from a pulper (2) in a pulping system (1) has a drawing roll (5) which draws the reject from the pulper (2) in the form of a ragger rope (3). The drawing roll (5) has a drive shaft (6) to which a pulley (7) is mounted and over which the ragger rope passes to a cutter. At least one measuring instrument (14) is mounted with respect to the ragger to measure the quantity and direction of the force applied to the drawing roll by the ragger rope (3) as it is drawn out of the pulper (2). The ragger is part of a pulping system (1) having a pulper (2) for preparation of a fiber pulp suspension and a method for controlling reject handling in the pulping system (1) is provided.

An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.

An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.

A method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture.

A method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture.

A method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture.

A method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture.