Valmet Ab

Metso Panelboard Ab

Valmet Aktiebolag

Örjan Ahlgren

Anders Thyr

Krister Sjöblom

Patrik Pettersson

Johan Carlsson

Anders Löfström

Anders Mattsson

Per Eriksson

Per Nyberg

Per Wallin

Mattias Grannas

Anders LÖFSTRÖM

The invention relates to a discharge screw arrangement () for discharging lignocellulosic material () from a lignocellulosic treatment reactor () and comprises a discharge screw (), a feeder pipe () and a blow pipe (), the discharge screw being accommodated in and rotatably arranged inside the feeder pipe and being configured to mechanically transport the lignocellulosic material in a longitudinal direction along a rotational axis of the discharge screw through the feeder pipe towards a downstream end () of the feeder pipe, which discharge screw arrangement is configured to allow steam to flow through the feeder pipe to help transporting the lignocellulosic material in the longitudinal direction along through the feeder pipe and out of the feeder pipe through an outlet nozzle () arranged in a side wall of the feeder pipe () at the downstream end of the feeder pipe and into the blow pipe, wherein the discharge screw arrangement further comprises a material spreader (), which is rotatably arranged at the downstream end of the feeder pipe and is configured to transport the lignocellulosic material in a radial direction, perpendicular to a rotational axis of the material spreader, towards the outlet nozzle, which is arranged peripherally of the material spreader, and out of the feeder pipe through the outlet nozzle and into the blow pipe.

Reactor discharge screw

According to the present invention, there is provided a treatment process system for biomass material and methods for such system. The system comprises a first dewatering stage arranged to receive biomass material, to remove liquid from the biomass material, and to feed the biomass material forward in the process. Further, the system includes a water treatment stage arranged to collect the removed liquid and an addition stage located downstream said dewatering stage and operatively coupled to the first dewatering stage. The addition stage is arranged to receive the de-watered biomass material, wherein the addition stage includes inlets for adding acid containing solution into the addition stage. A reactor stage arranged to receive the biomass material treated in the addition stage and to perform a pre-hydrolysis process to the biomass material. A filtrate feeding arrangement is arranged to feed liquid from the filtrate tank to the reactor stage.

System and method for treating biomass material

A steam separation unit for separation of steam from lignocellulosic biomass material in a hydrolysis process includes a treatment vessel including a separation section and a biomass collection section. The separation section is arranged with at least one inlet for receiving at least partly hydrolyzed biomass material mixed with steam and at least one control outlet for discharging the steam from the vessel. A biomass collection section arranged to be filled at least partly with liquid during operation and coupled to the separation section to collect the biomass material after separation from steam, wherein the biomass collection section includes a mixing element for mixing the biomass material with liquid and at least one control valve for discharging biomass material mixed with liquid. A system for hydrolysis of lignocellulosic biomass material including such a separation unit is also presented.

Steam separation unit for a system for hydrolysis of lignocellulosic biomass material

A discharge valve is disclosed which includes a valve housing which can be functionally connected to a process element having a pressurized interior space. The valve housing includes a flow channel having a longitudinal center axis (A) and is in working cooperation with a valve member. The flow channel is arranged to be in fluid communication with the pressurized interior space in the process element after the discharge valve has been connected to the process element. The valve member is displaceable between an open position and a closed position in a displacement direction (B) whereby the discharge valve can be opened and closed. The flow channel comprises a detachable inner lining having an envelope wall, and the detachable inner lining comprises an aperture extending through the envelope wall and through which the valve member is adapted to run when being displaced between the opened and closed positions.

Discharge valve with a detachable inner lining

An arrangement for feeding and dewatering lignocellulosic material in a hydrolysis process between a first reactor unit, where the material is partly hydrolyzed, to a second reactor unit, wherein the first reactor unit operates at a first pressure and the second reactor unit operates at a second pressure being higher than the first pressure. The arrangement includes a first plug screw feeder arranged to receive the partly hydrolyzed material from the first reactor unit and being arranged to compress, dewater and transport the material, wherein the first screw feeder is arranged to operate at a pressure being higher than the first pressure. A dilution vessel is coupled to receive material from the first plug screw feeder and including a liquid inlet for receiving liquid to wash the material, wherein the dilution vessel is arranged to maintain or increase the pressure (PDM). A second plug screw feeder is arranged to receive the diluted material and to compress, dewater and transport the material to the second reactor unit, wherein the second screw feeder is arranged to operate at a pressure being higher than the pressure of the first plug screw feeder. A system including such an arrangement and a first reactor unit and a second reactor unit is also presented.

Arrangement and system for a treatment process

A feed screw for feeding lignocellulosic material to a rotary disc refiner is disclosed. The feed screw includes at least one peripheral thread for feeding the lignocellulosic material axially towards the disc refiner and the feed screw feeds the lignocellulosic material from its upstream end towards its downstream end through the center of the opposed grinding surfaces of the disc refiner, the downstream end of the peripheral thread including an angled end part disposed at an angle with respect to the peripheral thread such that the lignocellulosic material is redirected in a radial direction as it leaves the end of the peripheral thread.

Feed screw arrangement

A disc housing intended for refiners with refining discs rotating in opposed directions relative to each other is disclosed for mechanically disintegrating and working fibrous material. The disc housing surrounds the refining discs in an air-tight manner, and is provided with an outlet for the worked fibrous material. The inside of the disc housing along its periphery is formed with a channel, which, as seen in the circumferential direction, has a continuously increasing radius, which increases all the way to the outlet, which is located tangentially as a direct continuation of the channel.

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Sundsvall, Sweden

Örjan Ahlgren