Abstract: A system for controlling the cleaning of a feeder housing in a high-pressure feeder includes: a high-pressure feeder including a housing that includes a tapered cylindrical chamber, the chamber having a drive end and an opposing tending end; a fluid conduit assembly operatively connected to the chamber, wherein the fluid conduit assembly includes a first conduit part configured to transport a first flow of cleaning fluid to the chamber via the tending end and a second conduit part configured to transport a second flow of cleaning fluid to the chamber via the drive end; a control valve configured to control the first flow of cleaning fluid; and a controller configured to receive a first input signal indicative of the initiation of a cleaning of the high-pressure feeder, and in response to the first input signal, control the control valve to reduce the first flow of cleaning fluid.

Abstract: Disclosed are a method and system for producing activated carbon The method comprises subjecting a carbon containing material to a steam explosion process in order to form a steam exploded carbon containing material, and pyrolyzing the steam exploded carbon containing material such that the activated carbon is formed. The system for producing activated carbon, the system comprises a steam explosion reactor assembly configured to subject a carbon containing material to a steam explosion process in order to form a steam exploded carbon containing material, and a pyrolyzer configured to pyrolyze the steam exploded carbon containing material such that the activated carbon is formed.

Abstract: A discharge arrangement for discharging lignocellulosic material includes: a screw conveyor section comprising an inlet for receiving lignocellulosic material from a treatment reactor; an outlet section configured to receive lignocellulosic material from the screw conveyor section; a conveyor screw rotatably arranged within the screw conveyor section for transporting the material in a material transport direction from the inlet to the outlet section; a material spreader rotatably arranged in the outlet section, which material spreader is rotatable in at least a first rotational direction around a rotational axis extending substantially in the material transport direction the material spreader; and a drive unit configured to rotate the material spreader around the rotational axis in at least said first rotational direction.

Abstract: A discharge arrangement for discharging lignocellulosic material includes: a screw conveyor section including an inlet for receiving lignocellulosic material; an outlet section configured to receive lignocellulosic material from the screw conveyor section; a conveyor screw rotatably arranged within the screw conveyor section for transporting the material in a material transport direction from the inlet to the outlet section; and a material spreader rotatably mounted within the outlet section, wherein the material spreader is rotatable in a first rotational direction and an opposite second rotational direction around a rotational axis extending in the material transport direction, which material spreader includes at least one blade configured to rotate around the rotational axis to transport the lignocellulosic material radially outwards and in the first and second rotational directions during rotation of the material spreader.

Abstract: A cooling shield for a liquor injection pipe of a liquor gun for supplying liquor to a combustion chamber of a recovery boiler, which has a first and a second side edge, the side edges extending in a longitudinal direction (L) of the cooling shield, and a first end edge and a second end edge extending between the side edges, the cooling shield comprising an outside shield wall, and an inside shield wall, the outside shield wall and the inside shield wall being connected along the side edges of the cooling shield, the cooling shield comprising a cooling medium space being arranged between the outside shield wall and the inside shield wall, the cooling shield comprising a cooling medium inlet and a cooling medium outlet the cooling medium inlet and the cooling medium outlet being arranged in communication with the cooling medium space.

Abstract: Method for treating biomass, comprising compressing and dewatering (62) the biomass to a dry solid content of DS1% by weight; feeding (63) compressed biomass to a treatment vessel; adding (64) a treatment liquid to said treatment vessel; discharging (65) treated biomass; compressing and dewatering (66) discharged biomass to a dry solid content of DS2% by weight, and treating (68) the compressed and dewatered biomass in a hydrolysis reactor, wherein 1%<DS1?DS2<6%.

Abstract: The present invention relates to a method for treating green liquor in a green liquor treatment arrangement, wherein the method comprises—adding (101) a flocculation agent to green liquor to form flocculated green liquor, —supplying (102) the flocculated green liquor to a clarifying vessel for separating flocculated green liquor into flocculated matter and clear green liquor, —removing (103) flocculated matter through a sludge outlet, and—removing (104) clear green liquor from the clarifying vessel, wherein the method further comprises—measuring (201) a flocculation of the green liquor, wherein said measuring takes place after adding the flocculation agent but before supplying the flocculated green liquor to the clarifying vessel. The invention also relates to a green liquor treatment device.

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.

Abstract: A blade for a refiner for refining lignocellulosic material is delimited by an inner periphery and an outer periphery and includes: a blade surface with a refiner portion on which a plurality of refiner bars are arranged, where: each refiner bar extends from an outer bar end to an inner bar end, and the plurality of refiner bars are arranged so that a movement along a bar extension from an outer bar end to an inner bar end of a refiner bar is also a movement in a first circumferential direction; and a dam that extends from an outer dam end to an inner dam end and connects at least three refiner bars, and wherein the dam is arranged so that a movement along a dam extension from an outer dam end to an inner dam end is also a movement in the first circumferential direction.

Abstract: A high performance through-air apparatus is provided. The though-air apparatus includes a through-air roll configured for rotational movement about a first axis, and a high flow circuitous air path inside of the apparatus that includes a path extending through a supply conduit, through the through-air roll, and also through an exhaust conduit. The through-air apparatus also includes a plurality of turning vanes positioned within the high flow circuitous path positioned to guide the flow of air through the apparatus. The through-air apparatus has a length, a width, a height, which together define a volume having a compact configuration. The high flow circuitous air path inside of the apparatus has a length, where the ratio of the volume of the through-air apparatus to the length of the high flow circuitous air path is less than 20 m2.

Abstract: A fiber pulp processing system includes: a mixer including: a porous metallic material. The porous metallic material has been built by additive manufacturing, and at least a part of a surface of the porous metallic material has been polished by vibration polishing. The fiber-pulp processing system is configured such that, while the mixer mixes fiber pulp, a fluid is dispersed through the porous metallic material into the fiber pulp.

Abstract: A method for removing one or more non-process elements (NPE) in a Kraft pulping process in a Kraft pulp mill, the method comprising using NaHCO3 derived from a green liquor H2S stripping process to solubilize non-process elements (NPE) accumulated in a lime cycle process in the Kraft pulp mill and removing the solubilized one or more non-process elements from the lime cycle process.

Abstract: A method for bleaching pulp formed from recycled textile material comprising cellulose The method comprises subjecting the pulp to at least Pulp formed from one bleaching stage (2), after a final bleaching stage of said at least one bleaching stage, washing (3) the pulp, and after said washing, acidifying (4) the pulp.

Abstract: A through-air apparatus for drying or bonding paper, tissue, or nonwoven webs is provided. The through-air apparatus includes a through-air roll configured for rotational movement about a first axis, the through-air roll having a first end and a second end. The through-air apparatus includes an exhaust duct/passage adjacent to the first end of the through-air roll, and a hood encompassing a portion of the through-air roll, where the hood defines an active arc length of the through-air roll positioned inside of the hood. The through-air apparatus further includes a first shroud extending substantially from the exhaust duct to the hood, the first shroud configured to reduce the amount of process air inside of the through-air apparatus that is released out of the through-air apparatus and reduce the amount of air outside of the apparatus that leaks into the through-air apparatus.

Abstract: A device and a method for weighing a roll of continuous web material on a spool at a weigh-ing station in a continuous process is described, which has fewer mechanical parts and is safer to use than prior devices and methods. The device is arranged adjacent to at least one of a pair of guide rails and comprises a damper and a load cell, wherein the load cell is integrated into at least one guide rail.

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.

Abstract: A pulp bale press for compressing pulp bales and configured for use in a pulp bale production line includes: a base; a top positioned opposite the base and connected to the base; and a movable pressing element configured to move between the base and the top. The pulp bale press is configured to compress a first pulp bale to be compressed between the base and the movable pressing element and to compress a second pulp bale to be compressed between the top and the movable pressing element. The movable pressing element is movably attached to the base via a first plurality of hydraulic cylinders comprising at least two hydraulic cylinders. The movable pressing element is movably attached to the top via a second plurality of hydraulic cylinders comprising an equal number of hydraulic cylinders as the first plurality of hydraulic cylinders.

Abstract: The present invention relates to a method for manufacturing a support body arrangement for an apparatus having an extended nip formed between the support body and a counter-pressure member, wherein the method comprises: providing a base body (51) comprising at least one pressure chamber configured to be pressurized for controlled expanding of the base body in a first direction; providing a support body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member; providing a mounting structure (53); mounting the support body (52) on the base body (51) by applying the mounting structure (53) so that movement of the support body (52) in relation to the base body (51) is prevented, wherein the support body (52) is placed on the base body (51) so that the working surface (15) faces away from the base body (51). The invention also relates to a support body arrangement.

Abstract: A folding apparatus for folding ends of a wrapping material around a pulp bale, said folding apparatus including: at least two folding arms, each including a contact element at an end thereof; at least two electric actuators, each configured to co-act with a folding arm such as to displace its contact element for making contact with the wrapping material to fold said wrapping material around an edge of the pulp bale; and a control unit configured to: determine, for each electric actuator, at least one operating parameter including a position parameter correlated to a position of one or more contact element and/or a force parameter indicative of actuator torque or force and/or a speed parameter indicative of a speed of rotation or displacement of the electric actuator, and control said at least two electric actuators using said at least one operating parameter.

Abstract: A method for recycling textile material comprising cellulose, the method comprising treating (2) the textile material using Hot Caustic Extraction, HCE, and, after said treating, bleaching (4) material obtained from said treating The HCE is carried out at a temperature of at least 100° C. The bleaching comprises at least one of ozone bleaching at a total ozone charge of more than 5 kg/odt; chlorine dioxide bleaching, and hydrogen peroxide bleaching at a total charge of more than 13 kg/odt.