White Water Or Broke Recovery, Recirculation Or Treatment Patents (Class 162/264)
  • Patent number: 10287181
    Abstract: An electrochemical reactor for electrochemically treating water, including a shell structure defining an inner space. The shell structure further includes an inlet portion having an inlet for conducting a water flow to the inner space, and a reactor chamber in flow connection with the inlet portion, and preferably with an outlet portion. The inlet is arranged such that the water flow to the inner space is directed away from the reactor chamber so as to cause the water flow to mix by forcing the water flow to change direction before entering the reactor chamber. A water treatment apparatus having such a reactor, and the use of such a reactor are also disclosed.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: May 14, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Mika Martikainen, Mikko Karhu, Matti Luukkonen, Niko Isomäki, Tuomas Van Der Meer
  • Patent number: 10100465
    Abstract: Integrated methods and systems for recycling waste material including waste paper are provided, the methods including treating the waste material in the pressure vessel at an elevated processing temperature and an elevated processing pressure to form a treated waste material including a substantially re-pulped waste paper; discharging the treated waste material from the pressure vessel; and thereafter separating and diluting the treated waste material to dilute a portion including the substantially re-pulped waste paper to from about 1% to about 20% by weight solids. The recovered paper pulp fraction and substantially fiber-free recoverable/recyclable plastics and metals may be further separated and used as feedstock in a variety of subsequent processes.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: October 16, 2018
    Assignee: GEORGIA-PACIFIC CONTAINERBOARD LLC
    Inventors: David Christer Henriksson, Wayne Frederick Winkler, Bradley E. Lucas, Paul Topping
  • Publication number: 20140262095
    Abstract: Whitewater recovery processes, and associated systems and components, are generally described. Certain embodiments relate to whitewater recovery processes in which ion exchange is used to remove dissolved ions from the whitewater, which can reduce the degree to which chemical additives are used in the process. In certain embodiments, flocculation and/or filter components can be employed to aid in the removal of suspended solids from the whitewater.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Kadant Inc.
    Inventors: Philip Mason Kemp, Chris Spence
  • Publication number: 20140174679
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the first pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the first bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending at least a portion of the second filtrate to a second location (5) of the first recycled filtrate loop, wherein the second location (5) is downstream of and in fluid communication with the first location (3); contacting the first pressed bleached pulp mixture with a second recycled filtrate obtained from a third location (6) of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location (6) is downstream of and in fluid communicati
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: CAIFANG F. YIN
  • Patent number: 8540847
    Abstract: Embodiments of the present invention are directed to apparatus and methods for the substantially continuous processing of cellulosic biomasses with a supercritical, critical or near critical fluid to produce ethanol, bio-fuels and high value end products.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 24, 2013
    Assignee: Aphios Corporation
    Inventor: Trevor Percival Castor
  • Publication number: 20130233502
    Abstract: A sheet-forming unit of a papermaking machine includes a headbox which outputs a suspension jet and an inner fabric and an outer fabric, which in each case form a loop. A forming element is arranged within the loop of the inner fabric and guide rolls and a white-water box are arranged within the loop of the outer fabric. The inner fabric and the outer fabric form a gap for receiving the suspension jet and jointly wrap around the forming element at least partially in a wraparound region. A machine-wide guide element is arranged in the wraparound region within the loop of the outer fabric and/or, in the region of at least one of the guide rolls of the outer fabric, a machine-wide guide apparatus is provided outside the chamber which is formed by the loop of the outer fabric.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 12, 2013
    Applicant: Voith Patent GmbH
    Inventors: Christian Schmid, Ulrich Flühler
  • Patent number: 8500957
    Abstract: A method for monitoring with enhanced sensitivity of the deposition of one or more organic materials dispersed in an aqueous medium in a papermaking process which includes measuring the rate of deposition of the organic materials from the aqueous medium onto a quartz crystal microbalance having a top side contacting with the aqueous medium coated with a layer containing a material with surface energy in the range from about 34 to about 49 dynes/cm2, and a second, bottom side isolated from the aqueous medium is disclosed. Additionally, a method for measuring the effectiveness of an inhibitor that decreases the deposition of the organic materials in a papermaking process is also disclosed.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: August 6, 2013
    Assignee: Nalco Company
    Inventors: Sergey M. Shevchenko, Michael J. Murcia
  • Patent number: 8486225
    Abstract: An inventive method includes the steps of: loading a fiber product in an appropriate form into a treatment vessel; wetting the fiber product; forcibly circulating an ozone-containing liquid in contact with the wetted fiber product to thereby bleach the fiber product; and forcibly circulating an ozone decomposing chemical agent liquid in contact with the ozone-treated fiber product to decompose ozone. This method ensures efficient bleaching of the fiber product with the ozone. Further, the method is advantageous in that the resulting bleached fiber product is less liable to be yellowed over time.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: July 16, 2013
    Inventors: Shigenori Aono, Koichi Abe, Keigo Takeda
  • Patent number: 8157966
    Abstract: An apparatus in connection with wire water treatment in the approach system of a paper machine, board machine or corresponding web formation machine, which apparatus includes a deaeration tank connected to devices for generating a vacuum inside the deaeration tank. At least one wire water feed pipe extends into the tank, which pipe opens into a vacuum space above the liquid surface level in the tank. A wire water discharge duct is connected to the bottom part of the tank. The feed pipe extends above the liquid level in the tank so that the wire water overflows the edge of the feed pipe onto the liquid level in the tank and the wire water discharge conduit extends downward and is connected to a pump.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: April 17, 2012
    Assignee: Andritz Oy
    Inventors: Jouni Parviainen, Ari Pelkiö, Ari Vilpponen
  • Patent number: 8133355
    Abstract: The invention relates to a method in the wet end of a web forming process. In the method, at least one electrode pair (102, 103) is placed in the wet end. The electrode pair (102, 103) is supplied with a current/voltage from a power source (100), so that an electric field is set up between the electrode pair (102, 103), causing the material particles in the pulp suspension in the wet end to be electrically charged in a desired manner and to move in a desired manner in the pulp suspension in the wet end. The current/voltage of the power source (100) is controlled by means of a measuring and control unit (101) so as to cause the material particles in the pulp suspension to be electrically charged and to move in a desired manner, thus allowing the retention, formation and orientation of the material particles in the pulp suspension to be substantially improved.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: March 13, 2012
    Assignee: Savcor Process Oy
    Inventors: Martti Pulliainen, Mikko Vepsalainen, Jukka Rautiainen, Matti Hakkinen, Pekka Kylliainen, Seppo Karine, Jari Rasanen, Kirsi Partti-Pellinen, Ari Johansson, Isto Heiskanen, Jyri Jarvi
  • Patent number: 8070916
    Abstract: Method and device for producing a web of tissue. In the method, the web of tissue is led over at least one drying cylinder, doctored off the latter with a creping doctor and then wound up by way of a winding device. The web of tissue is supported at least largely over the entire distance between creping doctor and winding device on one side by a transfer device, so that there is only a short free web draw, while its other side is free. The device includes at least one drying cylinder, a creping doctor arranged on the drying cylinder and a winding device that winds up the web of tissue. Between the creping doctor and the winding device, a transfer device at least largely bridges the entire distance which supports the web of tissue on one side. There is a short free web draw, but its other side is left free.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: December 6, 2011
    Assignee: Voith Patent GmbH
    Inventors: Thomas Scherb, Luiz Carlos Silva
  • Publication number: 20110253333
    Abstract: A method is described for making paper or paper board by applying a composition containing enzyme and cationic coagulant to papermaking pulp prior to paper forming to preferably improve drainage, retention, or both. Sheets of pulp from which paper or paperboard products are made with the method can exhibit excellent drainage, excellent retention of pulp fines, or both. The method also can be applied to other pulp treatments, such as waste water treatments. A system for making such treatments of paper furnish is also provided.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 20, 2011
    Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.
    Inventors: Weiping Ban, Gary Headrick, Rosa M. Covarrubias
  • Publication number: 20110232853
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the first pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the first bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending at least a portion of the second filtrate to a second location (5) of the first recycled filtrate loop, wherein the second location (5) is downstream of and in fluid communication with the first location (3); contacting the first pressed bleached pulp mixture with a second recycled filtrate obtained from a third location (6) of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location (6) is downstream of and in fluid communicati
    Type: Application
    Filed: March 18, 2011
    Publication date: September 29, 2011
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: CAIFANG F. YIN
  • Patent number: 8025760
    Abstract: A fluid transfer apparatus for bulk material is disclosed. The transfer apparatus includes a rotor mounted on a rotatable shaft and including axially extending flow channels extending through the rotor parallel to the shaft, flow connectors for connecting a low-pressure flow of fluid and a high-pressure flow of fluid into and out of the axially extending flow channels, a casing enclosing the rotor, a pair of axially sealing plates disposed between the ends of the rotor and the casing, a pressurizing fluid fed into the chamber defined by the casing to pressurize the rotor, the flow connectors, and the axially movable sealing plates.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: September 27, 2011
    Assignee: Metso Paper, Inc.
    Inventors: Lasse Hernesniemi, Torbjörn Jacobsson, Peter Danielsson, Anders Jonsson
  • Patent number: 7758725
    Abstract: A method of and apparatus for feeding a chemical into a liquid flow are especially suited for use with a headbox of a paper machine, particularly for feeding a retention aid into a fiber suspension flow going to the headbox so that in a mixing apparatus feed liquid is added into the retention chemical solution, prior to introducing the solution into the fiber suspension flow guided to the paper machine. The feed liquid is preferably a circulation water from the paper mill, or another non-clean liquid from a paper mill.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: July 20, 2010
    Assignee: Wetend Technologies Oy
    Inventor: Jouni Matula
  • Patent number: 7678234
    Abstract: A dewatering arrangement in the press section of a web-forming machine having a press suction roll (10) and a press fabric (13) arranged to run via the press suction roll (10). The dewatering arrangement has a saveall (15), which is installed in conjunction with the press suction roll (10), and drainage facilities (18) for removing the collected water from the saveall (15). The saveall (15) has a concave guide surface (19) which in the cross direction is located on a partial distance of the circumference of the press suction roll (10) and at a distance from the surface of the press suction roll (10) in order to accomplish a vacuum effect and to hence remove water from the press suction roll (10).
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: March 16, 2010
    Assignee: Metso Paper, Inc.
    Inventors: Risto Haiko, Erkki Hietamäki, Mikko Kauppinen, Reijo Koivuranta, Kauno Kujala, Pekka Petrilä, Timo Pirinen, Esa Rajala, Markku Salo, Sampo Vörgren
  • Publication number: 20090288790
    Abstract: A method of and apparatus for treating a green liquor stream produced in a kraft pulp process to separate green liquor from dregs present in the stream by utilizing a filtration vessel that has a pressure differential between the green liquor inlet and outlet to drive the dregs from the green liquor. In addition, negative pressure is utilized in the filtration vessel to thereby drive water vapor from and consequently cool the filtered green liquor.
    Type: Application
    Filed: May 22, 2008
    Publication date: November 26, 2009
    Inventors: Peter J. Flanagan, John B. Johnson, II
  • Publication number: 20090277598
    Abstract: The present invention relates to a device and a method for increasing the yield, as well as for enabling an increase in productivity and an increased amount of production, and at the same time to improve purification of process water and waste water, respectively by decreasing the waste water flow and the amount of pollutants in the waste water.
    Type: Application
    Filed: September 12, 2005
    Publication date: November 12, 2009
    Inventors: Tomas Jarnmark, Torbjörn Hansson
  • Patent number: 7416636
    Abstract: The present invention relates to a method and apparatus for foam forming, wherein fibrous foam suspension is introduced from the head box (78, 178) of a production machine to the web forming section thereof. At least one solid material is mixed into the foam in the head box (78, 178). The method and the apparatus of the invention are particularly suitable for manufacturing various web-like products of cellulose, glass fiber, aramide, sisal, or other corresponding fibre material.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: August 26, 2008
    Assignee: Ahlstrom Glassfibre Oy
    Inventors: Rainer Blomqvist, Harri Kostamo, Eino Laine, Kay Rokman
  • Patent number: 7407563
    Abstract: An apparatus in the treatment of stock passed to a headbox of a paper machine or equivalent includes at least two stock chests (10a1, 10a2). Stock (M1) from a first stock chest (10a1) is passed along a line (a1, a2) to a hydrococyclone plant (20) in the short circulation of the paper machine or equivalent. An accept line (a3) of the hydrocyclone plant is connected with a stock line (b1) of the stock (M2) fed from a second stock chest (10a2), and a combined stock flow is passed along a line (b2) to the headbox (100) of the paper machine or equivalent. A method in the treatment of the stock passed to a headbox of a paper machine or equivalent is disclosed.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: August 5, 2008
    Assignee: Metso Paper, Inc.
    Inventor: Matti Hietaniemi
  • Patent number: 7363730
    Abstract: A device (21) and method for removing a broken pulp web (27) from a pulp dryer and a maintenance platform (23) comprising such a device. The device (21) comprises an actuator (31), a pulling means (33) functionally coupled to the actuator and adapted to be driven by the actuator, and a gripping means (1, 11) coupled to the pulling means (33) and comprising means (4, 5) for engaging to the pulp web. The actuator is arranged to actuate the gripping means via the pulling means. The actuator is used to pull the gripping means and along with it, the pulp web out from the pulp dryer.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: April 29, 2008
    Assignee: Metso Paper, Inc.
    Inventors: Olli Huhtala, Hannu Kokkala
  • Patent number: 7318883
    Abstract: The invention concerns an equipment and a method in a paper or board machine for mixing fresh stock (M) with water (V) used for dilution of the fresh stock. At the point of mixing (K) of the dilution water (V) and the fresh stock (M) passed from the pipe (13), there is at least one such pipe portion as comprises a wave-shaped form in its connection in the cross section of the pipe.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: January 15, 2008
    Assignee: Metso Paper, Inc.
    Inventors: Jouni Rahkomaa, Sakari Soini
  • Publication number: 20070267163
    Abstract: A used paper recycling apparatus being installed in a room of a small shop or the like, friendly to the environment, low in running cost, and capable of maintaining a high confidentiality.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 22, 2007
    Applicant: SEED COMPANY LIMITED
    Inventors: Shigeru Tamai, Yuji Koyama
  • Patent number: 7226526
    Abstract: The invention relates to a starch and fiber mixture, and the application of a starch and fiber mixture in paper manufacturing. The starch and fiber mixture is applied to a paper mat, after the paper mat is formed. The starch and fiber mixture may be obtained by the selective filtering of white water from the papermaking process, particularly by use of a pressure screen.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: June 5, 2007
    Assignee: Corn Products International, Inc.
    Inventors: Philip Strong, Brian Edward Ireland, John Gregory Kinney
  • Patent number: 7166194
    Abstract: A water jet cutter for separation of a trim strip from a moving paper, cardboard, tissue or other type of fiber web, in a machine for the production and/or conversion of the fiber web, including at least one nozzle whose water jet is directed onto the fiber web. An advantage of the present invention is to simplify the construction of the device while maintaining at least equal operational reliability, and to enable installation above a pulper in order to eliminate the necessity for removal and extraction systems.
    Type: Grant
    Filed: April 19, 2003
    Date of Patent: January 23, 2007
    Assignee: Voith Paper Patent GmbH
    Inventors: Karlheinz Straub, Michael Sollinger, Ralf Pfifferling
  • Patent number: 7101418
    Abstract: The invention relates to a method and a device for degassing of suspension, specifically fiber stock suspension. The method according to the invention is characterized in that separated excess suspension is discharged sideways through an overflow having an overflow edge that is located in the tank outside wall and is positioned parallel to the tank axis. The device according to the invention is characterized in that the overflow includes at least one overflow having an overflow edge that is located in the tank outside wall and is positioned parallel to the tank axis and that at least one overflow system, for the purpose of discharging the separated excess suspension, is located following the overflow.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: September 5, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Karl-Heinz Beuermann
  • Patent number: 7090746
    Abstract: A process and apparatus for removing water from a mechanical pulp, chemical pulp or paper sheet, carried between top and bottom wires running through a dewatering machine having a first dewatering zone. The apparatus includes at least one suction box positioned downstream of the first dewatering zone. The process includes generating an air current in at least one of the wires downstream of the first dewatering zone with the suction box. The air current removes water from the wire and directs it into an inner chamber of the suction box. The invention also refers to a device for implementing the process.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: August 15, 2006
    Assignee: Andritz AG
    Inventors: Franz Petschauer, Karl Hornhofer, Thomas Kefer, Dietmar Hausjell, Edgar Brogyanyi, Reinhard Diemat
  • Patent number: 7048826
    Abstract: A method for target application of a Performance Enhancing Material to a creping cylinder in order to improve a tissue making operation is described and claimed. The method involves dividing the creping cylinder into Zones and then applying the desired Performance Enhancing Material on a Zone by Zone basis such that each Zone has the optimal Performance Enhancing Material present. Furthermore, a method to ascertain the amount and pattern of application of the Performance Enhancing Material used on the creping cylinder is described and claimed. This method involves adding an inert fluorescent tracer to said Performance Enhancing Material and then to use a fluorometer to look for the tracer on the creping cylinder, and/or on the creped tissue product and/or in the water removed from the felt.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: May 23, 2006
    Assignee: Nalco Company
    Inventors: Sammy L. Archer, Gary S. Furman, Jr.
  • Patent number: 7011729
    Abstract: The invention relates to a starch and fiber mixture, and the application of a starch and fiber mixture in paper manufacturing. The starch and fiber mixture is applied to a paper mat, after the paper mat is formed. The starch and fiber mixture may be obtained by the selective filtering of white water from the papermaking process, particularly by use of a pressure screen.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: March 14, 2006
    Assignee: Corn Products International, Inc.
    Inventors: Philip Strong, Brian Edward Ireland, John Gregory Kinney
  • Patent number: 6942760
    Abstract: At the end of the twin wire zone of a paper machine former, a suction box (17) inside the upper wire loop (11) has a curved lid (17?) opposite a roll (18) within the lower wire loop (10). The lid is curved in a run situation so the tension of the upper wire (11) reduces the normal force between the wire (11) and the lid (17?) caused by the underpressure of the suction box. The underpressure keeps the web mainly off from the roll (18) and the lower wire (10) while being adhered to the underside of the upper wire (11) and conforming to the curved shape of the lids. Members (17a, 18?) are provided for making the web follow the lower wire (10) in a break situation for conducting it to the broke handling system.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: September 13, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Pertti Heikkilä, Antti Poikolainen, Ari Puurtinen
  • Patent number: 6918996
    Abstract: A method and apparatus in ropeless tail threading in a multi-roll calender is disclosed wherein the threading tail is guided through the multi-roll calender in such a way that, before the multi-roll calender, the threading tail is guided first of all to the broke processing and then cut when the tail threading begins. The tail threading takes place in stages, so that at least once during the tail threading the threading tail in connection with the multi-roll calender is guided to broke processing and cut, after which the tail threading is continued, once the previous stage has succeeded.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: July 19, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Kari Hasanen, Juha Laitio, Mika Viljanmaa
  • Patent number: 6869504
    Abstract: A vacuum pump (P0) provides vacuum to a paper machine deaeration tank (11) which has an inlet duct (10) through which the tank is supplied with wire water. A discharge duct (12) extends from the deaeration tank (11). There is an overflow (14) for the wire water in the discharge duct at the discharge end of the discharge duct (12). The overflow (14) of the discharge duct (12) is located below the deaeration tank (11) and opens to a free air space. The discharge duct (12) includes a branch duct (15a1) for a flow which is passed to the headbox (100).
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: March 22, 2005
    Assignee: Metso Paper, Inc.
    Inventor: Matti Hietaniemi
  • Patent number: 6841040
    Abstract: In the short circulation of a paper machine, a chemicals flow (F1) is fed into a fibre suspension flow in connection with a pipe expansion comprising a first pipe (1) and a second pipe (2) having a larger diameter than the first pipe, which pipes are connected to each other by means of an expansion step (3) perpendicular to the direction of flow. The chemicals flow (F1) can be passed so as to be mixed with the fibre suspension flow either in the second pipe (2) in an ideal mixing zone situated after the expansion step (3) or in the first pipe (1) so close to the expansion step (3) that the chemicals which are added have no time to react with the fibre suspension before the flow enters the expansion step (3).
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: January 11, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Hannu Lepomäki, Juhani Sams
  • Publication number: 20040256071
    Abstract: Method and apparatus for producing fibre pulp and fuel out of municipal waste or for producing fibre pulp out of waste paper. To control the microbe content, the retention time of the process is kept shorter than 12 hours, advantageously shorter than 6 hours. This is achieved by minimizing the total liquid volume of the process and by increasing the amount of water being passed to water treatment from the process, which water, having been purified, is possibly returned to the process. The method may also include a phase in which the pulp is treated thermally in order to destroy the microbes present in it.
    Type: Application
    Filed: March 17, 2004
    Publication date: December 23, 2004
    Inventors: Markku Huhtamaki, Kai Sipila, Jouko Hautala
  • Patent number: 6827820
    Abstract: The invention relates to a degassing centrifugal apparatus such as a pump and to a process for pumping and degassing a fluid. The apparatus has a rotatable hollow rotor connected to a stationary fluid inlet at one end and a stationary liquid outlet at the opposite end and a gas exhaust in the center thereof. The rotor has at its inlet end a bladed wheel with arcuate blades. The bladed wheel accelerates a fluid flow in said rotor inlet end and causes the fluid to rotate at a peripherical velocity higher than the peripherical velocity of said rotor inlet end. The apparatus is especially useful for pumping and degassing backwater in the production of paper or board in a paper machine.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: December 7, 2004
    Assignee: POM Technology Oy AB
    Inventor: Paul Meinander
  • Publication number: 20040144513
    Abstract: A process arrangement in the short circulation of a paper machine comprises devices (10-13) for dilution of thick stock, centrifugal cleaners (14), and a headbox fan pump (16), as well as a pipe system connecting these. There is a direct flow connection from the centrifugal cleaners (14) along a pipeline (30) to the headbox fan pump (16), through which pipeline (30) a centrifugally cleaned stock flow (F6) is passed direct to the headbox fan pump (16) without any deaeration or dilution stages in between. A secondary line (32) is connected to the pipeline (30) for passing through it part of the centrifugally cleaned stock flow as a return flow (F7) back to the thick stock dilution devices (10-13). By this arrangement it can be ensured that the pressure on the suction side of the fan pump (16) remains substantially constant.
    Type: Application
    Filed: March 9, 2004
    Publication date: July 29, 2004
    Inventor: Matti Hietaniemi
  • Publication number: 20040108087
    Abstract: A means for splash separation at a dandy roll on a fourudrinier machine is disclosed. The means comprises a doctor blade and a cover in order to separate and divert water further from the dandy roll. A rotating roll is positioned for collecting the separated water from the dandy roll. An additional doctor blade is used for wiping off the water from the rotating roll and for diverting it into a tub. The water leaves the tub at one or both short sides, which are open. In order to divert the water towards the respective short end, the tub is positioned or shaped inclined towards one or both short ends.
    Type: Application
    Filed: December 2, 2003
    Publication date: June 10, 2004
    Inventors: Ake Holm, Johan Bergstrom, Christer Klintang
  • Patent number: 6736937
    Abstract: The present invention relates to a method of and an apparatus for controlling the operation of the short circulation of a paper, paper board or the like production machine. The method and apparatus according to the invention are especially preferably suitable for use in the approach system, i.e. so-called short circulation, of said production machines for regulating the headbox feed pressure. A characteristic feature of the method and apparatus according to the invention is that at a suitable location in the approach system of said production machine there is arranged a controllable parallel flow, by means of which at least one flow in the approach system is regulated so that the pressure in the headbox remains essentially constant.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: May 18, 2004
    Assignee: Andritz Oy
    Inventors: Lasse Björkstedt, Jouni Matula
  • Patent number: 6733631
    Abstract: A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: May 11, 2004
    Assignee: Ahlstrom Glassfibre Oy
    Inventors: Jorma Elonen, Kay Rokman, Arto Koso, Juhani Jansson
  • Patent number: 6733629
    Abstract: The present invention relates to a method and apparatus for controlling the operation of an approach system of a paper machine or the like web formation apparatus. Especially preferably the method of controlling the operation of an approach system according to the invention is applicable to be used in connection with paper and paperboard machines as well as in connection with various apparatuses performing non-woven webformating.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: May 11, 2004
    Assignee: Andritz Oy
    Inventor: Jouni Matula
  • Patent number: 6730193
    Abstract: The present invention relates to a wire pit. A characteristic feature of the wire pit (50) according to the invention is that its wall/walls (52′, 52″, 54′, 62) converge downwards so that the average flow direction of the liquid along the most part of the wire pit's (50) height deviates from vertical.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: May 4, 2004
    Assignee: Andritz Oy
    Inventors: Jouni Matula, Riitta Rahkonen
  • Patent number: 6716315
    Abstract: Water draining device for a paper machine or the like, in particular for a felted press of such a paper machine, including a receiving tank extending at least essentially over the machine width. The receiving tank includes a first chamber that receives arriving water and is under ambient pressure, and a second chamber that is connected to the first chamber and is under vacuum, into which the water collecting in the first chamber is aspirated and from which the water is eventually drained. A water receiving device of improved efficiency is also provided by forming a water receiving device by at least one suction channel projecting into the wedge-shaped area between the upper press roll and the dewatering belt, and extending transverse to the pulp web, which suction channel is connected to a source of reduced pressure.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: April 6, 2004
    Assignee: Voith Paper Patent GmbH
    Inventors: Karl Steiner, Robert Wolf, Hans Prinzing
  • Publication number: 20040060680
    Abstract: The invention relates to an apparatus for passing stock to a headbox (100) of a paper machine or equivalent. The apparatus comprises a deaeration tank (11) which is provided with vacuum by means of a vacuum pump (Po) or another device. The deaeration tank (11) comprises an inlet duct (10) through which it is supplied with wire water. The deaeration tank (1) comprises a discharge duct (12) and, at the discharge end thereof, an overflow (14) for the wire water in the discharge duct (12). Said overflow (14) of the discharge duct (12) is located below the deaeration tank (11) and opens to a free air space, and that the discharge duct (12) includes a branch duct (15a1) for a flow which is passed to the headbox (100).
    Type: Application
    Filed: October 14, 2003
    Publication date: April 1, 2004
    Inventor: Matti Hietaniemi
  • Publication number: 20030221809
    Abstract: A method and apparatus in ropeless tail threading in a multi-roll calender is disclosed wherein the threading tail is guided through the multi-roll calender in such a way that, before the multi-roll calender, the threading tail is guided first of all to the broke processing and then cut when the tail threading begins. The tail threading takes place in stages, so that at least once during the tail threading the threading tail in connection with the multi-roll calender is guided to broke processing and cut, after which the tail threading is continued, once the previous stage has succeeded.
    Type: Application
    Filed: May 23, 2003
    Publication date: December 4, 2003
    Applicant: Metso Paper, Inc.
    Inventors: Kari Hasanen, Juha Laitio, Mika Viljanmaa
  • Patent number: 6638394
    Abstract: In a method and an associated apparatus for discharging the whitewater from inside the loop of a continuous dewatering wire of a former, specifically a twin wire former in a paper machine the accumulating whitewater is collected by a collection tank, which is located within the loop; the collected whitewater is separated from the air, still inside the loop, by suctioning off of the area above the collection tank and the whitewater is removed from the collection tank through at least one channel that is connected to the collection tank and is located below the collection tank's water level.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: October 28, 2003
    Assignee: Voith Paper Patent GmbH
    Inventors: Wolfgang Mayer, Ralf Rziha
  • Publication number: 20030192661
    Abstract: A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).
    Type: Application
    Filed: May 8, 2003
    Publication date: October 16, 2003
    Applicant: Ahlstrom Glassfibre Oy
    Inventors: Jorma Elonen, Kay Rokman, Arto Koso, Juhani Jansson
  • Publication number: 20030106661
    Abstract: In the short circulation of a paper machine, a chemicals flow (F1) is fed into a fibre suspension flow in connection with a pipe expansion comprising a first pipe (1) and a second pipe (2) having a larger diameter than the first pipe, which pipes are connected to each other by means of an expansion step (3) perpendicular to the direction of flow. The chemicals flow (F1) can be passed so as to be mixed with the fibre suspension flow either in the second pipe (2) in an ideal mixing zone situated after the expansion step (3) or in the first pipe (1) so close to the expansion step (3) that the chemicals which are added have no time to react with the fibre suspension before the flow enters the expansion step (3).
    Type: Application
    Filed: December 9, 2002
    Publication date: June 12, 2003
    Inventors: Hannu Lepomaki, Juhani Sams
  • Patent number: 6551458
    Abstract: In a papermaking process, filtering of white water containing fiber material is performed by feeding the white water to a filter on a surface of which a layer of auxiliary pulp has been formed, such that the white water is filtered through the layer of auxiliary pulp and fiber material in the white water remains in the layer of auxiliary pulp. The mixture of auxiliary pulp and fiber material is removed from the filter and is fed to a fractionating screen. The screen separates the mixture into a short-fibered pulp fraction that can be returned to the papermaking process, and a long-fibered pulp fraction that is returned to the filter where it is used as auxiliary pulp to form a layer on the filter surface.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: April 22, 2003
    Assignee: Metso Paper, Inc.
    Inventors: Vesa Juutinen, Timo Pekkarinen
  • Patent number: 6524443
    Abstract: A paper machine includes a traveling belt for carrying a fiber web, and a cutting device disposed below the belt for cutting the fiber web into smaller pieces. The cutting device has an inlet and an outlet. A guiding device guides the fiber web from the belt to the inlet of the cutting device. A pulper is connected with the outlet of the cutting device for receiving the smaller pieces of fiber web from the cutting device. The traveling belt may be in the form of, e.g., a wire, felt or water impervious belt. The cutting device may be in the form of, e.g., a shredder, fluffer, water jet cutter, laser cutter and/or roll cutter.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: February 25, 2003
    Assignee: Voith Sulzer Paper Technology North America, Inc.
    Inventors: Klaus Doelle, Werner Witek, Robert J. Matz
  • Patent number: 6516830
    Abstract: Apparatus and process for guiding portions of backwater produced or stored at different levels of a machine. The apparatus includes an upper backwater chamber arranged to receive first backwater, a lower backwater chamber arranged below the upper backwater chamber and to receive at least a portion of the first backwater from the upper backwater chamber. A plurality of hydraulic lines are arranged to couple the upper backwater chamber to the lower backwater chamber, and inlet openings of the plurality of hydraulic lines are arranged inside the upper backwater chamber and are arranged at different geodetic heights relative to one another. The process includes collecting first backwater in an upper backwater chamber, and guiding the first backwater from the upper backwater chamber to a lower backwater chamber through inlet openings to a plurality of hydraulic lines. The inlet openings are arranged at different geodetic heights relative to one another.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: February 11, 2003
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Anton Gmeiner