White Water Patents (Class 162/190)
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Patent number: 12065367Abstract: A method of controlling a volatile fatty acid in an aqueous industrial system is provided in the present disclosure. The method includes determining a level of dissolved oxygen in process water in the aqueous industrial system and adding an effective amount of a control agent to the process water if the determined level of dissolved oxygen is above a predetermined level. The compositions and methods can lower the amount of VFA present in the aqueous industrial system.Type: GrantFiled: April 15, 2022Date of Patent: August 20, 2024Assignee: ECOLAB USA Inc.Inventor: Herman Mark Grimm
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Patent number: 12043961Abstract: Methods and systems for reducing the loss of usable fibers from whitewater while simultaneously increasing paper making machine performance and paper quality are provided. The methods and systems utilize a fractionating saveall to separate whitewater into a dilute wastewater fraction that contains unwanted fine particles and a thicker consistency reusable fraction containing paper-forming fibers. The reusable fraction is recirculated back into the whitewater stream, while the wastewater is routed away from the whitewater stream.Type: GrantFiled: May 7, 2020Date of Patent: July 23, 2024Inventor: Joseph P. McDonald
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Patent number: 11939726Abstract: A multi-layered web is disclosed that is resilient and/or elastic in the Z-direction. Thus, when the web is compressed, the web assumes a compacted state and then expands to an expanded state when the compressive forces are removed. In one embodiment, the multi-layered web includes a middle layer made from a resilient blend of fibers positioned inbetween two outer layers. The middle layer, for instance, can contain elastomeric fibers, three-dimensional fibers, and/or debonded fibers.Type: GrantFiled: December 28, 2018Date of Patent: March 26, 2024Assignee: Kimberly-Clark Worldwide, Inc.Inventors: David A. Lilley, Donald E. Waldroup, Charles W. Colman, Joseph K. Baker, Marvin E. Swails, Michael Payne, Vicky S. Polashock
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Patent number: 11879061Abstract: Liquid polymer and inverse emulsion compositions comprising: one or more hydrophobic liquids having a boiling point at least about 100° C.; one or more acrylamide-(co)polymers; one or more emulsifier surfactants; one or more inverting surfactants; and one or more siloxane polyether compounds. When the composition is inverted in an aqueous solution, it provides an inverted solution having a filter ratio using a 1.2 micron filter (FR1.2) of about 1.5 or less.Type: GrantFiled: June 29, 2018Date of Patent: January 23, 2024Assignee: KEMIRA OYJInventors: Hong Yang, Frances Troy
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Patent number: 11794156Abstract: A method and system are used to enhance a marker material to include a plurality of air bubbles. The method of manufacturing a marker includes enhancing a marker material to include a plurality of air bubbles using at least a first EFD and a second EFD. The method may include cycling repeatedly through a transfer process between a first container and a second container. A system for enhancing a marker material includes a transfer apparatus configured to receive a marker material and a selected amount of air. The system comprises a first EFD coupled to a first end of the transfer apparatus and a second EFD coupled to a second end of the transfer apparatus.Type: GrantFiled: February 28, 2020Date of Patent: October 24, 2023Assignee: Devicor Medical Products, Inc.Inventors: Timothy Zimmer, Michelle Louise Johnson, Stephen D. Stallard
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Patent number: 11753324Abstract: The present invention relates to a method for treating an aqueous liquid effluent containing calcium and carbonate ions and containing precipitation-inhibiting products, said process comprising the following successive steps: a) providing an aqueous liquid effluent supersaturated with CaCO3 and containing precipitation-inhibiting products; b) having the effluent obtained in step a) pass into a reactor with high solid content with a solid content maintained between 20 and 800 g/l and integrated solid-liquid separation, at a pH comprised between 8 and 9.2 allowing in a single step precipitation in situ of the aragonite polymorph of calcium carbonate and removal of the precipitation-inhibiting products; c) recovering an aqueous liquid supernatant containing a suspended solids content of less than or equal to 0.1% by mass of the solid content in the reactor, advantageously a suspended solids content of less than 50 mg/l, the precipitation-inhibiting products being phosphonates.Type: GrantFiled: September 14, 2015Date of Patent: September 12, 2023Assignee: Veolia Water Solutions & Technologies SupportInventors: Didier Grange, M. Coste, E. Barbier
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Patent number: 11674267Abstract: A differential density paper product comprising at least one paper web is disclosed. The paper product has: (a) from about 20% to about 90% by weight of the dry fiber basis of the paper product of a refined soft wood pulp fiber mixture, (b) pulp fibers selected from the group consisting of hard wood fibers, non-wood fibers, recycled fibers, synthetic polymer fibers, bleached eucalyptus kraft fibers, and combinations thereof; and, (c) not more than about 10% by weight moisture.Type: GrantFiled: May 4, 2020Date of Patent: June 13, 2023Assignee: Mercer International Inc.Inventor: Tobias Ziegenbein
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Patent number: 11668053Abstract: The present disclosure provides for a paper product. The paper product has: (a) from about 20% to about 90% by weight of the dry fiber basis of the paper product of a refined soft wood pulp fiber mixture, (b) pulp fibers selected from the group consisting of hard wood fibers, non-wood fibers, recycled fibers, synthetic polymer fibers, bleached eucalyptus kraft fibers, and combinations thereof; and, (c) not more than about 10% by weight moisture.Type: GrantFiled: May 4, 2020Date of Patent: June 6, 2023Assignee: MERCER INTERNATIONAL INC.Inventor: Tobias Ziegenbein
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Patent number: 11519104Abstract: Method of recycling a textile material which comprises cellulose for manufacturing regenerated cellulosic molded bodies, wherein in the method the textile material is comminuted, at least a part of non-fiber-constituents of the comminuted textile material is separated from fiber-constituents of the comminuted textile material, at least a part of non-cellulosic fibers of the fiber-constituents is mechanically separated from cellulosic fibers of the fiber-constituents, at least a further part of the non-cellulosic fibers is chemically separated from the cellulosic fibers, and the molded bodies are generated based on the cellulosic fibers after mechanically separating and chemically separating.Type: GrantFiled: January 14, 2019Date of Patent: December 6, 2022Assignee: LENZING AKTIENGESELLSCHAFTInventors: Christoph Klaus-Nietrost, Richard Herchl, Christian Weilach
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Patent number: 11154087Abstract: A method of isolating compounds from a tobacco-derived black liquor, including receiving a black liquor from a pulping process of an input material comprising a plant of the Nicotiana species, treating the black liquor with an acid to lower the pH of the black liquor to about 7 or lower in order to produce a precipitate and an acidified black liquor, separating the precipitate and the acidified black liquor, extracting the acidified black liquor with an organic solvent in order to produce an organic layer extract and an aqueous layer extract, and separating the organic layer extract and the aqueous layer extract.Type: GrantFiled: February 2, 2016Date of Patent: October 26, 2021Assignee: R.J. Reynolds Tobacco CompanyInventors: Christopher Junker, Michael Francis Dube, Anthony Richard Gerardi
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Patent number: 10995454Abstract: A method of making nonwoven fibrous materials suitable for use in a pollution control device or as a firestop, where the method comprises: providing a first slurry comprising water, first inorganic fibers, a first organic binder, and a first neutral pH flocculent; removing first waste water from the first slurry; optionally forming a first nonwoven fibrous material from the first slurry; providing a second slurry comprising a quantity of the first waste water, an optional quantity of relatively clean water, second inorganic fibers, a second organic binder, and a second flocculent that is the same and/or a different flocculent than that used in the first slurry; and forming a second nonwoven fibrous material from the second slurry. The addition of the first waste water in the second slurry does not adversely affect the flocculation of the second organic binder in the second slurry.Type: GrantFiled: December 12, 2014Date of Patent: May 4, 2021Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Richard P. Merry, Ian R. I. Harding, Gary F. Howorth
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Patent number: 10550517Abstract: Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.Type: GrantFiled: May 26, 2016Date of Patent: February 4, 2020Assignee: VALMET AKTIEBOLAGInventors: Elin Engqvist, Leif Videgren
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Patent number: 9993747Abstract: The present invention is directed to a plate settler cover that prevents algae growth, prevents contamination from organic material, and provides structural support for a user who is standing or walking on the plate settler system. The plate settler covers can either float directly on standing water present in the system or may be structurally supported such that the plate cover is positioned above the surface of the water.Type: GrantFiled: September 1, 2016Date of Patent: June 12, 2018Assignee: Meurer Research, Inc.Inventors: Joseph K. Brauch, Christopher D. Hanson
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Patent number: 9856606Abstract: Methods for reducing the effects of wetlapping, drying, and hornification of pulp fibers and consequently increasing the pulp drainage and strength properties in the final product (i.e., paper) are provided. The method which has been developed creates a “value-added” product by the wastepaper supplier or at the pulp and/or deinking (recycled paper) mill—a wastepaper load/bale, wet pulp stock or wet lap, or dried pulp treated with or impregnated with enzymes that enhance the quality of the pulp or paper product when it is repulped and processed at the paper mill.Type: GrantFiled: December 12, 2011Date of Patent: January 2, 2018Assignee: Enzymatic Deinking Technologies, L.L.C.Inventors: James Tausche, Jianhua Ma, Paul Tausche
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Patent number: 9752279Abstract: 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: GrantFiled: September 22, 2015Date of Patent: September 5, 2017Assignee: GEORGIA-PACIFIC CONTAINERBOARD LLCInventors: David Christer Henriksson, Wayne Frederick Winkler, Bradley E. Lucas, Paul Topping
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Patent number: 9506190Abstract: 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: GrantFiled: February 17, 2015Date of Patent: November 29, 2016Assignee: Kadant Inc.Inventors: Philip Mason Kemp, Chris Spence
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Patent number: 8986503Abstract: 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: GrantFiled: March 13, 2013Date of Patent: March 24, 2015Assignee: Kadant Inc.Inventors: Philip Mason Kemp, Chris Spence
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Patent number: 8840761Abstract: The present invention relates to a process for controlling deposits in a paper making process, more particularly to a process comprising the use of talc for controlling deposits in a paper making process with talc. One aspect of the invention is contacting talc with a white water stream at one or more locations within the paper making process after separating pulp from a pulp-containing stream and before introducing the re-circulating the white water stream to one or more of a pulper, a thick-stock, a thin-stock, a dilution process, a shower, a storage vessel, a blending process, and a digestor.Type: GrantFiled: June 8, 2011Date of Patent: September 23, 2014Assignee: Imerys Talc America, Inc.Inventor: Daniel Mark Woiceshyn
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Publication number: 20140262095Abstract: 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: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: Kadant Inc.Inventors: Philip Mason Kemp, Chris Spence
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Patent number: 8778135Abstract: A circular utilization method in pulping and papermaking processes with straw Primary pulp is obtained by digesting straw raw material according to the ammonium sulfite method. Concentrated black liquor is extruded from the primary pulp; paper pulp and diluted black liquor. The concentrated black liquor and the diluted black liquor are mixed, and a contaminated condensate is obtained. A residual concentrate or the concentrated black liquor is used for preparing a fertilizer. The contaminated condensate is mixed with one or more of the waste material obtained from stock preparation, a crop byproduct or organic waste, and substrate or fertilizer is obtained by fermenting the nitrogen source of the contaminated condensate or ammonium sulfite, or using the contaminated condensate for desulfurizing flue gas. Ammonia and flue gas are reacted to obtain the ammonium sulfite as a digestion agent; and water from recycling is used in corresponding phases of the pulping process.Type: GrantFiled: March 11, 2011Date of Patent: July 15, 2014Assignee: Shandong Tralin Paper Co., Ltd.Inventors: Hongfa Li, Mingxin Song, Songtao Chen, Jihui Yang, Liangjin Guo
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Publication number: 20140174679Abstract: 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 communicatiType: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Applicant: INTERNATIONAL PAPER COMPANYInventor: CAIFANG F. YIN
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Patent number: 8715466Abstract: A method and system for reducing waste water from a paper machine system. The system involves splitting a flow output from a seal water tank. With a portion of the flow output being used to maintain a fluid level within a wire pit, and the balance being recycled to the system as substantially clean water.Type: GrantFiled: October 19, 2012Date of Patent: May 6, 2014Inventor: Theodore Caouette
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Publication number: 20140110074Abstract: A method and system for reducing waste water from a paper machine system. The system involves splitting a flow output from a seal water tank. With a portion of the flow output being used to maintain a fluid level within a wire pit, and the balance being recycled to the system as substantially clean water.Type: ApplicationFiled: October 19, 2012Publication date: April 24, 2014Inventor: Theodore Caouette
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Publication number: 20130233502Abstract: 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: ApplicationFiled: April 17, 2013Publication date: September 12, 2013Applicant: Voith Patent GmbHInventors: Christian Schmid, Ulrich Flühler
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Patent number: 8157957Abstract: A process for producing a veil comprising glass fibers and cellulose fibers which includes dispersing cellulose fibers and chopped glass fibers into a white water, forming a bed in a forming device by passage of the dispersion over a forming fabric through which the white water is drained off, the fibers being retained on the fabric and the dispersion including, during passage, a cationic white water, and performing a heat treatment step an oven device.Type: GrantFiled: January 7, 2004Date of Patent: April 17, 2012Assignee: Saint-Gobain Technical Fabrics EuropeInventors: Michel Droux, Carl DeSaint Jean
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Patent number: 8147651Abstract: Methods to control and suppress odor in papermaking sludge are described. One method involves admixing sludge from a papermaking process and cyclodextrin to provide treated sludge with the cyclodextrin present in an effective amount to control odors in the treated sludge. The deodorized sludge may be used as a component of resin-wood composite products, such as composite decking materials, walls, flooring, casting forms, and the like.Type: GrantFiled: June 27, 2008Date of Patent: April 3, 2012Assignee: Buckman Laboratories International, Inc.Inventors: Gerald M. Dykstra, James N. Graham, Scott D. Branum
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Patent number: 8133355Abstract: 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: GrantFiled: October 20, 2006Date of Patent: March 13, 2012Assignee: Savcor Process OyInventors: Martti Pulliainen, Mikko Vepsalainen, Jukka Rautiainen, Matti Hakkinen, Pekka Kylliainen, Seppo Karine, Jari Rasanen, Kirsi Partti-Pellinen, Ari Johansson, Isto Heiskanen, Jyri Jarvi
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Publication number: 20110303378Abstract: The present invention relates to a process for controlling deposits in a paper making process, more particularly to a process comprising the use of talc for controlling deposits in a paper making process with talc. One aspect of the invention is contacting talc with a white water stream at one or more locations within the paper making process after separating pulp from a pulp-containing stream and before introducing the re-circulating the white water stream to one or more of a pulper, a thick-stock, a thin-stock, a dilution process, a shower, a storage vessel, a blending process, and a digestor.Type: ApplicationFiled: June 8, 2011Publication date: December 15, 2011Applicant: LUZENAC AMERICA, INC.Inventor: Daniel Mark Woiceshyn
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Publication number: 20110232853Abstract: 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 communicatiType: ApplicationFiled: March 18, 2011Publication date: September 29, 2011Applicant: INTERNATIONAL PAPER COMPANYInventor: CAIFANG F. YIN
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Publication number: 20110186254Abstract: The present invention is directed to an apparatus used in the formation of paper. More specifically the present invention is directed to an apparatus, system, and method for lowering the consistency or degree of density of fiber suspension on the forming table, and improving the quality and physical properties of the paper formed thereon.Type: ApplicationFiled: February 3, 2011Publication date: August 4, 2011Inventor: Luis Fernando CABRERA Y LOPEZ CARAM
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Patent number: 7887629Abstract: The core of the present invention resides in supplying pigment in a kind of “basic grade”, preferably as a solid, and milling in an aqueous phase in situ in a satellite milling plant to obtain the desired whiteness and grain size. As a result of this invention, papermakers are no longer bound to predetermined particle sizes of the fresh pigments and/or fresh fillers and pigment slurries obtainable from suppliers of raw materials. Papermakers are capable of preparing themselves pigment slurries in a satellite plant in situ according to the current needs. This permits a flexible and quick reaction to changing quality and production requirements, as well as lower shipping costs because no water is shipped as would be necessary in the usual slurry, and an improved stability of the self-prepared pigment slurry, as compared to the prior art.Type: GrantFiled: July 15, 2002Date of Patent: February 15, 2011Assignee: Alpha Calcit Füllstoff GmbHInventor: Dieter Münchow
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Publication number: 20090277598Abstract: 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: ApplicationFiled: September 12, 2005Publication date: November 12, 2009Inventors: Tomas Jarnmark, Torbjörn Hansson
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Patent number: 7566382Abstract: A method and arrangement for controlling short circulation in a paper machine, in which the control of at least one property of the diluted fiber-containing pulp conducted to the headbox is based on consistency measurement or determination in high-consistency fiber-containing pulp, diluted pulp and/or white water. The amount of fiber-based fines in high-consistency fiber-based pulp, diluted fiber-based pulp and/or white water is determined, and the result obtained is used for controlling at least one property of the fiber-containing pulp to be conveyed to the headbox.Type: GrantFiled: August 26, 2005Date of Patent: July 28, 2009Assignee: Metso Automation OYInventor: Matti Hietaniemi
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Patent number: 7435314Abstract: In a method for the production of a fibrous web, especially a paper or cardboard web, an automatic ash control system and an automatic retention control system for the reduction or suppression of an interactive build-up of the two controls are linked via a model for the dependence between the filler addition and the retention agent consumption. A computer assisted quality control system is also cited.Type: GrantFiled: November 3, 2004Date of Patent: October 14, 2008Assignee: Voith Paper Patent GmbHInventors: Niels Hardt, Michael Schwarz
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Patent number: 7416636Abstract: 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: GrantFiled: November 7, 2002Date of Patent: August 26, 2008Assignee: Ahlstrom Glassfibre OyInventors: Rainer Blomqvist, Harri Kostamo, Eino Laine, Kay Rokman
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Patent number: 7407563Abstract: 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: GrantFiled: February 5, 2004Date of Patent: August 5, 2008Assignee: Metso Paper, Inc.Inventor: Matti Hietaniemi
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Patent number: 7374637Abstract: The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main conduit is used for the bleaching steps. Wash filtrates obtained from the wash steps, used after or before the bleaching step, are led in conduits to branch locations on the main conduit that are positioned downstream of the branch location for drawing off of wash and/or dilution liquor for the wash step in question. All branch points in the joint main conduit are in fluid communication with one another along the main conduit.Type: GrantFiled: November 16, 2005Date of Patent: May 20, 2008Assignee: GL&V Management Hungary kftInventors: Vidar Snekkenes, Lennart Gustavsson
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Patent number: 7318883Abstract: 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: GrantFiled: December 5, 2000Date of Patent: January 15, 2008Assignee: Metso Paper, Inc.Inventors: Jouni Rahkomaa, Sakari Soini
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Patent number: 7300539Abstract: A method of treating solid containing material derived from effluent or sludge from a plant for deinking paper, the material containing calcium in the form of one or more insoluble calcium compounds, the method including the steps of treating the material with an acid to cause dissolution of the calcium thereby forming a calcium ion-containing solution in which insoluble solids are suspended, separating the solution from the insoluble solids and incinerating the separated solids. The solution containing calcium ions may be treated by adding one or more reagents to form a calcium compound precipitate, eg calcium carbonate. The particulate solids produced following the incineration step and following the precipitate formation may be employed as pigments or fillers in paper making or paper coating.Type: GrantFiled: November 21, 2002Date of Patent: November 27, 2007Assignee: Imerys Minerals LimitedInventor: Jonathan Stuart Phipps
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Patent number: 7294233Abstract: A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater.Type: GrantFiled: December 18, 2002Date of Patent: November 13, 2007Assignee: Georgia Tech Research CorporationInventors: Sujit Banerjee, Howard Corcoran
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Patent number: 7226526Abstract: 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: GrantFiled: November 22, 2005Date of Patent: June 5, 2007Assignee: Corn Products International, Inc.Inventors: Philip Strong, Brian Edward Ireland, John Gregory Kinney
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Patent number: 7198696Abstract: A method of controlling the production of filler-containing paper. Filler and retention agent are delivered to a paper manufacturing system in a process of paper manufacture. The amount of filler in the paper is measured, as is also the filler concentration or the total concentration in the white water or the stock. Filler is delivered such that the system will be buffered with filler to a generally pre-determined concentration level. The continual addition of retention agent is based exclusively on the amount of filler in the paper measured at that moment in time. When the measured amount of filler present is lower than a desired level, the addition is increased. When the measured amount of filler present is higher than a desired level, the addition is reduced. The continual addition of filler is based, exclusively on the concentration level of filler measured in the white water or the stock.Type: GrantFiled: December 7, 2001Date of Patent: April 3, 2007Assignee: M-real CorporationInventors: Kent Börje Eriksson, Oskar Nordin
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Patent number: 7011729Abstract: 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: GrantFiled: November 12, 2003Date of Patent: March 14, 2006Assignee: Corn Products International, Inc.Inventors: Philip Strong, Brian Edward Ireland, John Gregory Kinney
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Patent number: 6869504Abstract: 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: GrantFiled: December 19, 2001Date of Patent: March 22, 2005Assignee: Metso Paper, Inc.Inventor: Matti Hietaniemi
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Patent number: 6827820Abstract: 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: GrantFiled: April 17, 2002Date of Patent: December 7, 2004Assignee: POM Technology Oy ABInventor: Paul Meinander
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Publication number: 20040238140Abstract: The invention relates to a method in a paper or pulp process to control the chemical state of the pulp and circulation water system. In the process one or more raw-material components (PROCESS WATER, TMP, PULP, REJECT) diluted in liquid, possible fillers, and one or more additives are mixed to form stock. In the method, the electrochemical state of at least one raw-material component (PROCESS WATER, TMP, PULP, REJECT) and/or the stock is regulated, without the regulation substantially affecting the pH values of the raw-material components (PROCESS WATER, TMP, PULP, REJECT) and/or of the stock.Type: ApplicationFiled: February 20, 2004Publication date: December 2, 2004Inventor: Sakari Laitinen-Vellonen
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Patent number: 6802346Abstract: The invention relates to a process for collecting process water at a paper machine or the like, wherein water from several suction elements (2 . . . 2n, 2m) provided at a wire (1) is led in such a way that an unbroken liquid column is maintained in the outlet pipes (8 . . . 8n, 8m) of the suction elements and is made to join a common collecting vessel (9, 9m). The liquid levels (20 . . . 20n) of the outlet pipes am regulated by regulating the liquid level (11) in at least one separate level vessel (10) towards which the water from the respective outlet pipes is led in at least one closed and essentially horizontal collecting channel (9, 9m) which is common for several outlet pipes. (8 . . . 8n, 8m), the liquid in said collecting channel (9, 9m) at the same time forming the lower part of said unbroken liquid column.Type: GrantFiled: January 28, 2003Date of Patent: October 12, 2004Assignee: Pom Technology Oy ABInventor: Paul Olof Meinander
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Publication number: 20040168783Abstract: The present invention relates to a process for recycling cleaner rejects from the preparation of paper, paperboard and cardboard and to their use for the preparation of paper in the paper stock or as a coating slurry for the paper industry.Type: ApplicationFiled: March 25, 2004Publication date: September 2, 2004Inventor: Dieter Munchow
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Publication number: 20040144513Abstract: 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: ApplicationFiled: March 9, 2004Publication date: July 29, 2004Inventor: Matti Hietaniemi
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Patent number: 6736937Abstract: 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: GrantFiled: July 16, 2002Date of Patent: May 18, 2004Assignee: Andritz OyInventors: Lasse Björkstedt, Jouni Matula