Apparatus Patents (Class 162/232)
  • Patent number: 10619302
    Abstract: A sheet manufacturing apparatus includes a crusher unit, a defibrator unit, a second web forming unit, and a shaping unit. The crusher unit coarsely crushes a raw material that contains fibers into coarsely crushed pieces. The defibrator unit defibrates coarsely crushed pieces into defibrated material. The second web forming unit forms a web by accumulating defibrated material. The shaping unit forms a sheet from the web. The crusher unit is positioned vertically below the shaping unit.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: April 14, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Katsuhito Gomi, Shigeo Fujita
  • Patent number: 10392747
    Abstract: A method is disclosed for optimization of continuous digestion process. Exemplary embodiments can control a delignification process in a continuous pulp digester in an optimal way for different pulp grades taking into account process disturbances and model uncertainties. This can be achieved by customizing a generic mathematical model for a continuous digestion process which runs through a software application on a dedicated electronic device. The model can be updated periodically based on on-line information, and used with a plant optimization component involving multi-objective optimization to evaluate optimal set points for the controllers. A system is also disclosed for optimizing control of a continuous pulp digester.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: August 27, 2019
    Assignee: ABB Schweiz AG
    Inventors: Shrikant Bhat, Babji Buddhi Srinivasa, Prasanna Pathath
  • Patent number: 9612064
    Abstract: A thermally conductive composite element is particularly suited for use in a surface heating system or in a surface cooling system. The composite element has at least one main part which contains expanded graphite and at least one flat textile structure disposed on one face of the main part. The textile structure is connected to the face of the main part by an inorganic adhesive.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: April 4, 2017
    Assignee: SGL Carbon SE
    Inventors: Werner Langer, Michael Steinroetter, Robert Michels, Werner Guckert
  • Patent number: 9200337
    Abstract: Methods and systems are disclosed for the hydrolysis of mixed biomass. The methods include forming a mixture of at least two modified biomass feedstocks to achieve various benefits, such as maximizing sugar yields and minimizing the formation of degradation products.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: December 1, 2015
    Assignee: Renmatix, Inc.
    Inventors: Manuk Colakyan, Rory Hernan Jara-Moreno
  • Patent number: 9028767
    Abstract: A method for mixing a chemical into a process liquid including: injecting the chemical into the process liquid flowing through a flow pipe; forming reaction products by a reaction involving the chemical occurring in the process flow; applying an electric field or magnetic field to a region of the flow pipe adjacent to the reaction occurring in the process flow, and suppressing the precipitation of the chemical or the reaction products on the surfaces of the pipe due to the electric or magnetic field.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: May 12, 2015
    Assignee: Wetend Technologies Oy
    Inventors: Jari Rasanen, Jouni Matula
  • Publication number: 20150053362
    Abstract: A hydraulic drive assembly for a large pre-existing pressurized digester vessel and a method of installation of the hydraulic drive assembly have been conceived. Such a device includes a stub shaft which has a lower end and an upper end. The lower end engages with a hydraulic drive and the upper end is coupled to a drive shaft. The coupling further includes a top coupling and a bottom coupling. The top coupling is coupled to the drive shaft, and the bottom coupling is coupled to the stub shaft. A drive support bracket is attached to the hydraulic drive and then attached to the drive support bracket by at least one sole plate that is fixed to a foundation. The hydraulic drive assembly installation method is utilized when removing an electric motor and mechanical transmission device and replacing it with a hydraulic drive assembly.
    Type: Application
    Filed: July 21, 2014
    Publication date: February 26, 2015
    Inventors: Keith Vogel, Tim Pease
  • Publication number: 20140352900
    Abstract: A flash tank including: an interior chamber having a interior surface formed by a sidewall of the flash tank; a vapor exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an insert inlet tube having an insert outlet and inserted into an inlet port of the chamber, wherein the insert inlet tube extends inward of the sidewall and the insert outlet has an elongated cross-sectional shape oriented substantially parallel to a center vertical axis of the flash tank and substantially perpendicular to a radial line of the flash tank, such that the insert outlet is substantially tangential to the sidewall.
    Type: Application
    Filed: May 8, 2014
    Publication date: December 4, 2014
    Applicant: Andritz Inc.
    Inventors: Richard M. Grogan, Walter Edward Nellis, Tyson Bradford Hunt
  • Publication number: 20140352906
    Abstract: An exemplary embodiment provides a device of moving a low ignition propensity cigarette paper which includes an air moving body portion having a curved surface, an inlet injecting air, and a plurality of outlets disposed at the curved surface to discharge the air, in which the low ignition propensity cigarette paper having a coating portion is floated and turned by the air discharged from the plurality of outlets.
    Type: Application
    Filed: June 29, 2012
    Publication date: December 4, 2014
    Applicant: KT & G CORPORATION
    Inventors: Young-Il Jo, Harg-Jo Kwon, Jung-Yeon Park, Jong-Oh Kim, Sun-Cheol Kwon
  • Patent number: 8888958
    Abstract: A pressure diffuser washer comprising: an outer wall, an inner wall adjacent to the outer wall, the inner wall defining annular baffle chambers between the outer wall and the inner wall, wherein each of the annular baffle chambers is configured to connect to a source of a wash liquid, a reciprocating screen assembly adjacent to the inner wall, the reciprocating screen assembly defining a first annular chamber between the inner wall and the reciprocating screen assembly, an area in the inner wall defining a gap associated with each of the annular baffle chambers, wherein the wash liquid from an annular baffle chamber flows through the gap into the first annular chamber, and an annular baffle screen plate covering the gap, wherein the annular baffle screen plate defines openings sized to prevent rocks and other large particulate debris from entering the annular baffle chambers.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: November 18, 2014
    Assignee: Andritz Inc.
    Inventors: Grant Bechard, Keith Vogel, Jay Sheerer, Edward James Cummings, Carl Luhrmann
  • Patent number: 8877010
    Abstract: Properties of an end product, such as paper, paperboard or board, are important for the user of the end product. To be able to manufacture an end product of desired quality, it is important to know what kind of paper pulp used for manufacturing the end product results in a particular kind of property of the end product. Embodiments provide a method and an apparatus for generating a model, which model connects at least one property of the end product with at least one property of the paper pulp. On the basis of the model, also the manufacturing process can be controlled.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: November 4, 2014
    Assignee: Metso Automation Oy
    Inventor: Matti-Paavo Sarén
  • Patent number: 8858760
    Abstract: The present invention provides a machine for manufacturing low ignition propensity wrapping paper for cigarettes having combustion inhibition bands (B) intermittently formed on a web of paper by applying a combustion inhibition agent solution to the web by transfer. The machine includes a gravure roll (34) for forming combustion inhibition bands (B) on a web, the gravure roll (34) having recesses (66) in an outer circumferential surface for receiving the combustion inhibition agent solution, the recesses (66) each having a contour corresponding to the contour of the to-be-formed combustion inhibition band and having a large number of lands (68; 70) distributed therein and constituting parts of the outer circumferential surface of the gravure roll, and the recesses each being designed such that the total area of the lands within the recess is smaller than the area of the recess excluding the lands.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 14, 2014
    Assignee: Japan Tobacco Inc.
    Inventors: Shinzo Kida, Keisuke Towatari
  • Patent number: 8828189
    Abstract: A washer press apparatus for washing and dewatering a wide range of solids concentrations of pulp in liquid suspensions includes multiple distinct displacement wash zones about a drum with multiple nips.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: September 9, 2014
    Assignee: Andritz Inc.
    Inventors: Greg Hallas, Todd S. Grace
  • Patent number: 8801859
    Abstract: Self-cleaning apparatus and methods are disclosed for handling viscous fluids, such as thick solid-liquid slurries of lignocellulosic biomass and its components, under high pressure, using an array of retractable valves.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: August 12, 2014
    Assignee: Renmatix, Inc.
    Inventors: Michel Adam Simard, Scott William Sommer
  • Publication number: 20140182802
    Abstract: A pressure diffuser washer comprising: an outer wall, an inner wall adjacent to the outer wall, the inner wall defining annular baffle chambers between the outer wall and the inner wall, wherein each of the annular baffle chambers is configured to connect to a source of a wash liquid, a reciprocating screen assembly adjacent to the inner wall, the reciprocating screen assembly defining a first annular chamber between the inner wall and the reciprocating screen assembly, an area in the inner wall defining a gap associated with each of the annular baffle chambers, wherein the wash liquid from an annular baffle chamber flows through the gap into the first annular chamber, and an annular baffle screen plate covering the gap, wherein the annular baffle screen plate defines openings sized to prevent rocks and other large particulate debris from entering the annular baffle chambers.
    Type: Application
    Filed: December 5, 2013
    Publication date: July 3, 2014
    Applicant: ANDRITZ INC.
    Inventors: Grant BECHARD, Keith Vogel, Jay Sheerer, Edward James Cummings, Carl Luhrmann
  • Patent number: 8747619
    Abstract: Methods are provided for crystallizing a filler, especially in order to precipitate calcium carbonate on the surfaces of solids in the short circulation of a fiber web machine by feeding carbon dioxide and lime milk to the liquid flow of the short circulation and allowing them to react with one another, is characterized in that the feed system, the mixing method and/or mixing rate of the chemicals are selected such that a size distribution of the calcium carbonate crystals suitable for the purpose is obtained. Moreover, the invention relates to an approach system for a fiber web machine applying this method, characterized in that it is provided with devices for feeding and mixing carbon dioxide and lime milk into the liquid flow at such a rate that the applicable size distribution of the calcium carbonate crystals is obtained.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: June 10, 2014
    Assignees: UPM Kymmene Oyj, Wetend Technologies Oy
    Inventors: Esko Kukkamäki, Jouni Matula, Matti Spilä
  • Patent number: 8721840
    Abstract: The invention relates to an apparatus for mixing a gaseous or liquid substance into fiber suspension. The apparatus includes a tubular body, which defines a space that forms a flow channel for the suspension, in which body an inlet and an outlet for the suspension are arranged so that the suspension flows through the flow channel mainly in the axial direction. Further the apparatus comprises a feed member that extends into the flow channel transversely against the flow direction of the suspension and has a cylindrical wall provided with openings for leading the substance from the feed member into the flow channel. At least one protrusion is arranged on the inner surface of the tubular body in the region the feed member. A throttling member is arranged in the flow channel downstream of the feed member in the flow direction of the suspension, and a mixing chamber is formed in the flow channel between the feed member and the throttling member.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: May 13, 2014
    Assignee: Andritz Oy
    Inventors: Kari Peltonen, Arto Laukkanen, Timo Perttula, Janne Vehmaa
  • Patent number: 8685205
    Abstract: A flash tank for concentrating fluids including a wall defining a rounded interior chamber bounded by a top elliptical head opposite to a bottom elliptical head; an inlet nozzle of the chamber; a steam chamber operatively engaged to the top elliptical head, wherein the steam chamber includes baffles and a conduit that directs condensate from the steam chamber to the level of liquid condensate; a gas discharge port operatively engaged to the steam chamber; and a liquid discharge port engaged to the bottom elliptical head below a vortex breaker. Changes to the flow passage of the steam chamber have been made by extending the baffles further into the internal chambers of the steam chamber.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 1, 2014
    Assignee: Andritz Inc.
    Inventors: Walter Edward Nellis, Tyson Bradford Hunt, Richard M. Grogan
  • Publication number: 20140034260
    Abstract: A flash tank for concentrating fluids including a wall defining a rounded interior chamber bounded by a top elliptical head opposite to a bottom elliptical head; an inlet nozzle of the chamber; a steam chamber operatively engaged to the top elliptical head, wherein the steam chamber includes baffles and a conduit that directs condensate from the steam chamber to the level of liquid condensate; a gas discharge port operatively engaged to the steam chamber; and a liquid discharge port engaged to the bottom elliptical head below a vortex breaker. Changes to the flow passage of the steam chamber have been made by extending the baffles further into the internal chambers of the steam chamber.
    Type: Application
    Filed: June 3, 2013
    Publication date: February 6, 2014
    Inventors: Walter Edward NELLIS, Tyson Bradford Hunt, Richard M. Grogan
  • Publication number: 20130292079
    Abstract: Methods are provided for crystallizing a filler, especially in order to precipitate calcium carbonate on the surfaces of solids in the short circulation of a fiber web machine by feeding carbon dioxide and lime milk to the liquid flow of the short circulation and allowing them to react with one another, is characterized in that the feed system, the mixing method and/or mixing rate of the chemicals are selected such that a size distribution of the calcium carbonate crystals suitable for the purpose is obtained. Moreover, the invention relates to an approach system for a fiber web machine applying this method, characterized in that it is provided with devices for feeding and mixing carbon dioxide and lime milk into the liquid flow at such a rate that the applicable size distribution of the calcium carbonate crystals is obtained.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Applicants: WETEND TECHNOLOGIES OY, UPMKYMMENE OYJ
    Inventors: Esko KUKKAMÄKI, Jouni MATULA, Matti SIPILÄ
  • Publication number: 20130284390
    Abstract: An in-line drainer or liquid separator for draining liquid from a moving black liquor slurry stream having a screen basket mounted in the internal chamber of the in-line drainer. The screen basket includes slots to retain solid particles of the moving black liquor slurry stream within the black liquor slurry stream flow chamber and block the solid particles from entering the liquid collection chamber. The slots each have a curved corner edge adjacent a surface screen basket facing the black liquor slurry stream flow chamber.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 31, 2013
    Applicant: Andritz Inc.
    Inventors: Jay Sheerer, Jeffrey Lawrence Gazdik
  • Publication number: 20130206346
    Abstract: A flash tank including: a closed interior chamber; a gas exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an inlet nozzle attached to an inlet port of the chamber, wherein the inlet nozzle includes a flow passage, and a movable valve plate in the flow passage, wherein the valve plate has a first position which defines a first throat in the flow passage and a second position which defines a second throat having a smaller cross-sectional area than the first throat.
    Type: Application
    Filed: January 23, 2013
    Publication date: August 15, 2013
    Applicant: ANDRITZ INC.
    Inventor: Andritz Inc.
  • Publication number: 20130199746
    Abstract: The invention relates to an apparatus for mixing a gaseous or liquid substance into fiber suspension. The apparatus includes a tubular body, which defines a space that forms a flow channel for the suspension, in which body an inlet and an outlet for the suspension are arranged so that the suspension flows through the flow channel mainly in the axial direction. Further the apparatus comprises a feed member that extends into the flow channel transversely against the flow direction of the suspension and has a cylindrical wall provided with openings for leading the substance from the feed member into the flow channel. At least one protrusion is arranged on the inner surface of the tubular body in the region the feed member. A throttling member is arranged in the flow channel downstream of the feed member in the flow direction of the suspension, and a mixing chamber is formed in the flow channel between the feed member and the throttling member.
    Type: Application
    Filed: February 4, 2011
    Publication date: August 8, 2013
    Applicant: ANDRITZ OY
    Inventors: Kari Peltonen, Arto Laukkanen, Timo Perttula, Janne Vehmaa
  • Publication number: 20130139980
    Abstract: Methods and systems are provided for producing market pulp which include treatment of pulp with diverse ionic compounds before pulp drying. Cationically and anionically charged compounds can be used to treat pulp before pulp drying to improve pulp dewatering performance and efficiency in the production of market pulp. Market pulp products containing the treatment compounds are also described.
    Type: Application
    Filed: November 26, 2012
    Publication date: June 6, 2013
    Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.
    Inventor: Buckman Laboratories Internatinal, Inc.
  • Publication number: 20130139988
    Abstract: A planar element for use in a papermaking machine comprising a synthetic construction incorporating nanoparticles in a polymeric resin matrix.
    Type: Application
    Filed: January 30, 2013
    Publication date: June 6, 2013
    Applicant: Kadant Web Systems, Inc.
    Inventor: Kadant Web Systems, Inc.
  • Publication number: 20130126116
    Abstract: The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fibre suspension containing cellulose-containing fibres, the calcium hydroxide is allowed to attach onto the surfaces of fibres for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibres is brought into contact with carbon dioxide for precipitating the calcium carbonate. The invention also relates to a corresponding system for precipitating calcium carbonate in connection with cellulose-containing fibres. In addition, the invention relates to a fibrous product, which comprises pulp material produced by said method and comprising calcium carbonate.
    Type: Application
    Filed: August 16, 2011
    Publication date: May 23, 2013
    Applicant: UPM-KYMMENE CORPORATION
    Inventor: Paivi Solismaa
  • Publication number: 20130062030
    Abstract: A method for production of calcium carbonate in a target suspension of a fibrous web forming process of a fibrous web machine, wherein the calcium carbonate is produced in a reactor, the method includes: injecting a chemical including carbon dioxide or lime milk through an injection mixer to the target suspension flowing through the reactor; allowing the chemical including to react while in the target suspension to form calcium carbonate crystals, and inhibiting precipitation of the chemical or a reaction product of the chemical on a surface of or in the reactor by application of an electric or magnetic field to or proximate to the surface along a region of the surface adjacent to the reaction involving the chemical.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 14, 2013
    Applicants: WETEND TECHNOLOGIES OY, UPM-KYMMENE CORPORATION
    Inventors: Olavi Imppola, Esko Kukkamaki, Jouni Matula, Paivi Solismaa
  • Publication number: 20130000858
    Abstract: A method for mixing a chemical into a process liquid including: injecting the chemical into the process liquid flowing through a flow pipe; forming reaction products by a reaction involving the chemical occurring in the process flow; applying an electric field or magnetic field to a region of the flow pipe adjacent to the reaction occurring in the process flow, and suppressing the precipitation of the chemical or the reaction products on the surfaces of the pipe due to the electric or magnetic field.
    Type: Application
    Filed: March 9, 2011
    Publication date: January 3, 2013
    Applicant: WETEND TECHNOLOGIES OY
    Inventors: Jari Rasanen, Jouni Matula
  • Patent number: 8308906
    Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber in a rotating mill shell to a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having a number of apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber. The discharge grate assembly also includes a number of louvers movable between a closed position, in which the apertures in the body are at least partially covered by the louvers, and an open position, in which the apertures are at least partially unobstructed by the louvers.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: November 13, 2012
    Assignee: Polycorp Ltd.
    Inventors: David J. Page, Pramod Kumar, Robert Mepham
  • Publication number: 20120216977
    Abstract: The pressure diffuser incorporates a screen that has a considerable weight that is moved by a connecting rod in a reciprocating manner between an upper and lower position. The connecting rod is maneuvered by a hydraulic cylinder for vertically moving the screen in a first slow stroke concurrent with pulp-flow and moving the screen in a second fast stroke countercurrent to pulp-flow. The pressure diffuser has an inlet defined therein at the bottom of the vessel but the hydraulic cylinder is located at the top of the vessel. This design enables an increased active pressure area in the hydraulic cylinder for the fast stroke of the screen. This reduces the power-rating needed for the hydraulic system.
    Type: Application
    Filed: August 25, 2009
    Publication date: August 30, 2012
    Inventors: Robert Theiler, Allan Jonsson
  • Publication number: 20120193054
    Abstract: Methods and apparatuses for forming a nonwoven web are described herein. The apparatus includes a mixing partition defining one or more openings therein that permit fluid communication between two fluid flow streams, at least one of which includes a fiber. The apparatus also includes an enclosed region surrounding at least a portion of the mixing partition. The enclosed region is adapted to provide an applied pressure to a fluid flow stream to urge the stream through one or more of the openings in the mixing partition. The apparatus also includes a receiving region designed to receive at least a combined flow stream and form a nonwoven web by collecting fiber from the combined flow stream.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 2, 2012
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hemant Gupta, Ajay Singh
  • Patent number: 8211273
    Abstract: Washing apparatus is disclosed comprising one or possibly two co-operating cylindrical press rolls, each having a perforated outer surface. A guide surface is provided at a distance from the perforated outer surface and encloses the respective press roll in the circumferential direction over at least 225° of the roll's circumference, wherein a pulp passage is provided between the perforated outer surface and the guide surface. During operation, pulp that is fed into the pulp passage is guided in a direction of rotation of the respective press roll and is pressed in a pinch between the press rolls. The radial distance between the outer surface of the press roll and the guide surface is substantially the same throughout a portion of the pulp passage in the circumferential direction.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: July 3, 2012
    Assignee: Metso Paper, Inc.
    Inventor: Rickard Andersson
  • Patent number: 8187425
    Abstract: Apparatus for washing and dewatering pulp including a pair of rotatable press rolls with a permeable outer surface in a casing including a vat in which the press rolls are installed is provided. A gap is provided between the vat and the press rolls as well as means for feeding the pulp into the gap between the rolls and the vat includes a first segment partially enclosing the first roll and a second segment partially enclosing the second roll, and casing members for each segment are pivotable about axes of rotation to open and close the casing, and the distance between the axes of rotation is less than the sum of the outer diameter of the two press rolls.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: May 29, 2012
    Assignee: Metso Paper, Inc.
    Inventors: Johan Bylander, Fredrik Pontén, Jörgen Lundberg
  • Patent number: 8182653
    Abstract: A refiner steam separation system according to the present invention includes a blowline for transporting a mixture of fiber material from a refiner to an inlet of a steam separator. Waste steam is discharged from the separator through a waste steam outlet. Cleaned fiber material is discharged from the separator through an exit, which prevents a substantial portion of the waste steam from passing through the exit. A relay pipe communicates with the exit and a dryer duct, and transports cleaned fiber material therebetween. A resin input communicates with the relay pipe, and supplies resin therein. The resin is mixed with the cleaned fiber material prior to the cleaned fiber material being dried in the dryer duct. The present invention is also directed to a method of reducing VOC emissions generated during refining cellulosic fibrous material.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: May 22, 2012
    Assignee: Masonite Corporation
    Inventor: Dennis Henry Vaders
  • Patent number: 8177937
    Abstract: Apparatus and methods for controlling the flow of a pulp suspension from a container in which the pulp is processed or stored are disclosed. The container is pressurized to a first pressure and includes an outlet for the pulp suspension, a pump includes an inlet and an outlet, and the pump inlet is connected to the container. The pulp suspension is fed from the inlet to the outlet of the pump and provides a controlled decrease in pressure to which the pulp suspension is subjected in the pump during such transport, and the flow from the container is controlled by adjusting this controlled decrease in pressure.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: May 15, 2012
    Assignee: Metso Paper, Inc.
    Inventors: Dennis Nordgaard, Johan Stenmark, Peter Danielsson
  • Publication number: 20120111515
    Abstract: It is described a process for thermal hydrolysis and team explosion of biomass, said method comprising the steps of: (i) leading the biomass approximately continuous to a first preheating step and preheat the biomass, (ii) leading the preheated biomass into at least two reactors sequentially, (iii) heating and pressurising the reactor by addition of steam, (iv) keeping the re-actor(s) at a certain temperature and pressure for a certain time, (v) leading the heated and pressurised biomass from the reactor(s) to a first pressure relief tank without any substantial pressure reduction and quickly relief the pressure of the biomass by means of a nozzle, in order to disintegrate the biomass, (vi) leading the biomass from the first pressure relief tank to a second pressure relief tank having a lower pressure than the pressure of the first pressure relief tank, (vii) leading the so treated biomass to a downstream facility for subsequent treatment.
    Type: Application
    Filed: July 12, 2010
    Publication date: May 10, 2012
    Inventors: Pål Jahre Nilsen, Odd Egil Solheim, Paul Walley
  • Publication number: 20120037328
    Abstract: The high pressure sluice feeder has a conical rotor mounted in a housing having a complementary conical interior. The rotor has a plurality of trough-going pockets arranged offset to each other in the rotor. The housing has ports distributed evenly around a circumference of the housing and exposed to the pockets during rotation of the rotor. A conical exterior surface of the rotor or the conical interior surface of the housing is equipped with a flush-out groove. The groove catches any abrasive particles caught between the complementary conical surfaces of the rotor and housing. The abrasive particles are flushed out towards the trough-going pockets of the rotor when one end of the groove is pressurized by either one neighboring trough-going pocket or a sealing liquid supply to a gable end of the rotor/housing.
    Type: Application
    Filed: March 4, 2009
    Publication date: February 16, 2012
    Applicant: Metso Fiber Karlstad AB
    Inventors: Roland Bengtsson, Per Toreld, Lennart Gustavsson
  • Patent number: 8057639
    Abstract: A system has been developed for pretreating cellulosic biomass feed stock including: a first pressurized reactor receiving the feed stock, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; a sealing device having a first pressurized coupling to a feedstock discharge port of the first pressurized reactor, and a second pressurized coupling to a second pressurized reactor; a drain for a liquid including dissolved hemi-cellulosic material extracted from the feed stock in at least one of the first pressurized reactor and the sealing and extraction device; the second pressurized reactor assembly receiving the pressurized feed stock from the sealing device at a pressure substantially greater than the pressure in the first pressurized reactor, wherein cells of the feed stock are infused with water in the second pressurized reactor, and an expansion device downstream of the second pressurized reactor assembly, wherein the expansion device rapidly releases the pressure of the feed stock disc
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: November 15, 2011
    Assignee: Andritz Inc.
    Inventors: Thomas Pschorn, Namshee Shin, Bertil Stromberg
  • Patent number: 8048271
    Abstract: Apparatus for washing and dewatering cellulose pulp is disclosed comprising: a rotatable press roll having a perforated outer surface for dewatering the pulp; a stationary guide surface arranged at a distance from the perforated outer surface so as to enclose the press roll in the circumferential direction, such that a substantially closed vat is defined between stationary guide surface and the press roll; a pulp passage, being provided between the perforated outer surface and its stationary guide surface, such that during operation, pulp is transported in the direction of rotation and, at the end of the pulp passage, is pressed in a pinch between the press roll and a second press roll. A radial distance between the stationary guide surface and the associated press roll is generally increasing towards the pinch, such that the vat diverges, towards the pinch.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: November 1, 2011
    Assignee: Metso Paper, Inc.
    Inventor: Rickard Andersson
  • Patent number: 8048270
    Abstract: An apparatus for distributing a pulp flow, said apparatus including: a valve body connected to an inlet conduit and an outlet conduit for the pulp flow and provided with a closing member for opening and closing the valve to regulate the pulp flow; a distribution member arranged in a direction the pulp flow and downstream of the closing member, said distribution member distributing the pulp flow into at least two partial flows, and at least two channels wherein each channel receives a respective one of the two partial flows, wherein said channels are connected to the valve body or to the outlet conduit from the valve.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: November 1, 2011
    Assignee: Andritz Oy
    Inventors: Kari Peltonen, Janne Vehmaa
  • Patent number: 7981251
    Abstract: An apparatus for feeding one or more chemicals into a process stream of a papermaking process is disclosed, as well as a method of utilizing the apparatus for feeding one or more chemicals into a process stream is disclosed.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 19, 2011
    Assignee: Nalco Company
    Inventors: Tommy Jacobson, Mika Salonen, Martti Latva
  • Publication number: 20110146933
    Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber in a rotating mill shell to a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having a number of apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber. The discharge grate assembly also includes a number of louvers movable between a closed position, in which the apertures in the body are at least partially covered by the louvers, and an open position, in which the apertures are at least partially unobstructed by the louvers.
    Type: Application
    Filed: July 30, 2009
    Publication date: June 23, 2011
    Inventors: David J. Page, Pramod Kumar, Robert Mepham
  • Publication number: 20110139384
    Abstract: Apparatus and methods for controlling the flow of a pulp suspension from a container in which the pulp is processed or stored are disclosed. The container is pressurized to a first pressure and includes an outlet for the pulp suspension, a pump includes an inlet and an outlet, and the pump inlet is connected to the container. The pulp suspension is fed from the inlet to the outlet of the pump and provides a controlled decrease in pressure to which the pulp suspension is subjected in the pump during such transport, and the flow from the container is controlled by adjusting this controlled decrease in pressure.
    Type: Application
    Filed: July 1, 2009
    Publication date: June 16, 2011
    Applicant: METSO PAPER, INC.
    Inventors: Dennis Nordgaard, Johan Stenmark, Peter Danielsson
  • Patent number: 7951263
    Abstract: A method of dividing a suspension, especially a fiber suspension into an accept fraction and a fraction containing impurity particles in a centrifugal cleaning plant having at least two stages. The suspension is fed to a preceding stage, wherefrom a heavier fraction of the suspension is taken as accept fraction and a lighter fraction is taken as fraction containing impurity particles. The lighter fraction containing impurity particles is fed into a latter stage of the centrifugal cleaning plant. Before being fed to the latter stage, the feed consistency of the lighter fraction is increased.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: May 31, 2011
    Assignee: Andritz Oy
    Inventors: Marita Järvinen, Kimmo Nurminen
  • Patent number: 7901530
    Abstract: A method of manufacturing a fabric seam in a fabric for use as papermachine clothing, the fabric having loops at each of the fabric's transverse ends adapted for interconnection by way of a pintle to make the fabric endless, including the steps of bringing the ends into end-to-end disposition in order to interdigitate the loops, inserting a pintle in the interdigitated loops, heat setting to fix base yarns and the loops of the fabric in place, inserting at least one stuffer yarn, at least a part of which includes a low melt component, into selected void areas in the loops adjacent the pintle, adhering at least one batt layer to the seam by needling, and further heat setting to at least partially melt the stuffer yarn such that it deforms to substantially take on the shape of the void areas at the pintle joint, to bind fibers of the batt needled into the void areas and to bind adjacent yarns of the fabric.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: March 8, 2011
    Assignee: Voith Fabrics Patent GmbH
    Inventor: William D. Aldrich
  • Publication number: 20110005696
    Abstract: A device and a method for dilution of cellulose pulp of a consistency of between 20% and 45%. The cellulose pulp is arranged to fall down in a pulp chute during an addition of dilution liquid. The dilution is performed to a consistency in the range of 6-18%, above a level of established diluted pulp in a bottom of a pulp chute. A central distribution device with nozzles for addition of dilution liquid to the falling pulp above the level of established diluted pulp in the bottom of the pulp chute is arranged in the center of the pulp chute. The nozzles of the distribution device are fed with dilution liquid via a pipe that is arranged at least partly through the pulp chute.
    Type: Application
    Filed: March 20, 2009
    Publication date: January 13, 2011
    Inventors: Magnus Danielsson, Johan Bylander, Marten Dahl
  • Publication number: 20110000633
    Abstract: The method of the present invention for crystallizing a filler, especially in order to precipitate calcium carbonate on the surfaces of solids in the short circulation of a fiber web machine by feeding carbon dioxide and lime milk to the liquid flow of the short circulation and allowing them to react with one another, is characterized in that the feed system, the mixing method and/or mixing rate of the chemicals are selected such that a size distribution of the calcium carbonate crystals suitable for the purpose is obtained. Moreover, the invention relates to an approach system for a fiber web machine applying this method, characterized in that it is provided with devices for feeding and mixing carbon dioxide and lime milk into the liquid flow at such a rate that the applicable size distribution of the calcium carbonate crystals is obtained.
    Type: Application
    Filed: February 19, 2009
    Publication date: January 6, 2011
    Inventors: Esko Kukkamäki, Jouni Matula, Matti Sipilä
  • Publication number: 20100314055
    Abstract: A feed system for a comminuted cellulosic material including: a chip bin having an upper chip inlet, an interior chamber oriented generally vertically and a lower discharge port; at least one liquor inlet to the chip bin to inject liquor in the chip bin, wherein the chip bin retains sufficient liquor and chips within the interior chamber to create a hydraulic pressure on the chips at the lower discharge port; a generally horizontally oriented chip conveyor or tube coupled to the lower discharge port to receive the chips and liquor from the bin under the hydraulic pressure, wherein the conveyor or tube includes liquor injectors which inject liquor into the chips and the conveyor or tube, and a high pressure transfer device coupled to a discharge of the conveyor or tube to receive the chips and liquor, whereby the hydraulic pressure of the chips and liquor at the discharge of the chip bin is sufficient to feed the chips and liquor to the high pressure transfer device.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 16, 2010
    Applicant: ANDRITZ INC.
    Inventors: Tyson Bradford HUNT, Bertil STROMBERG
  • Patent number: 7846297
    Abstract: A hood (10) is located above a web forming section (12), a press section (14) and/or a dryer section and includes a ceiling (30), a back side wall, and a front side wall (44), which includes staggered wall segments (42). The wall segments (42) are adapted to move along rails or similar. The front side wall segments (42) are adapted to form two or more groups (46). A cleaning station (40) is arranged to automatically clean the side wall segments (42) as they move past the cleaning station.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: December 7, 2010
    Assignee: Metso Paper, Inc.
    Inventors: Jyrki Buller, Samppa J. Salminen, Jussi Salojärvi, Jyrki Savela, Risto Väätänen
  • Publication number: 20100279061
    Abstract: The present invention relates to a machine for fabricating a medium for abrasive-coated grinding material, wherein at least one continuous reinforcing element in the form of a tape or a yarn is introduced continuously during wet formation of the medium.
    Type: Application
    Filed: November 26, 2008
    Publication date: November 4, 2010
    Applicant: Arjowiggins Arches
    Inventor: Thierry Mayade
  • Publication number: 20100263819
    Abstract: A screen basket with replaceable profiled bars is described herein. The screen basket includes profiled bars evenly spaced circumferentially to form a plurality of continuous slots that covers the whole basket length. The profiled bars are fixed in place by a backing structure, including support rings. The support rings are made of at least two sections.
    Type: Application
    Filed: October 24, 2008
    Publication date: October 21, 2010
    Inventor: Guy Maurais