EP1514592A1 - Procédé et dispositif de mélange statique, en particulier pour l'encollage des fibres lignocellulosiques en utilisant un liant - Google Patents

Procédé et dispositif de mélange statique, en particulier pour l'encollage des fibres lignocellulosiques en utilisant un liant Download PDF

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Publication number
EP1514592A1
EP1514592A1 EP04019796A EP04019796A EP1514592A1 EP 1514592 A1 EP1514592 A1 EP 1514592A1 EP 04019796 A EP04019796 A EP 04019796A EP 04019796 A EP04019796 A EP 04019796A EP 1514592 A1 EP1514592 A1 EP 1514592A1
Authority
EP
European Patent Office
Prior art keywords
mixing
flow
pressure drop
arrangement
substances
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04019796A
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German (de)
English (en)
Other versions
EP1514592B1 (fr
Inventor
Wolfgang Stahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Glunz AG
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Glunz AG
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Filing date
Publication date
Application filed by Glunz AG filed Critical Glunz AG
Publication of EP1514592A1 publication Critical patent/EP1514592A1/fr
Application granted granted Critical
Publication of EP1514592B1 publication Critical patent/EP1514592B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4311—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/222—Control or regulation of the operation of the driving system, e.g. torque, speed or power of motors; of the position of mixing devices or elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/222—Control or regulation of the operation of the driving system, e.g. torque, speed or power of motors; of the position of mixing devices or elements
    • B01F35/2221—Control or regulation of the operation of the driving system, e.g. torque, speed or power of motors; of the position of mixing devices or elements the position of baffles used to modify the flow in a conduit or a container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/029—Feeding; Proportioning; Controlling

Definitions

  • the invention relates to a mixing method having the features of the preamble of Patent claim 1 and a static mixer with the features of the preamble of Patent claim 9.
  • Static mixers and mixing processes resulting from their operation are many Application areas known.
  • the ones to be mixed with each other Substances which are particulate, solid substances and / or liquid Substances can act in a liquid or gas flow through a Passed mixing arrangement, which provides a turbulence of the flow, which in turn leads to the desired mixing of the substances.
  • MDF medium-density fiberboard
  • the current state of the art in the gluing of lignocellulosic fibers for the Production of fiberboard is the glueing in a blowpipe between one of the wet lignocellulosic fibers emitting refiner and a downstream Dryer for the fibers.
  • This gluing process which is a special form of mixing process, has the disadvantage that it is associated with an increased binder consumption, the order about 20% above the binder consumption in the Trommelmischerbeleimung.
  • Binder consumption can not be fully clarified.
  • One reason may be that one ideally uniform distribution of the binder on the lignocellulosic fibers before these enter the dryer, whereby the binder is fixed on the fibers so far, that a wider distribution is at least severely hampered is not achieved.
  • DE 197 40 676 C2 discloses a tower as a static mixer for the mixing of Fibers and binders in a laterally confined flow, in or on its wall Means for vortexing the fibers are arranged, which serve as baffles, baffles or may be formed like and adjustable. On the way of adjustability but such means for entangling the fibers is not carried out here.
  • DE 101 39 128 A1 discloses a method and a device for the Vacuum impregnation of small-sized material in an evacuable impregnation chamber, for example, as a rotatable drum with adjustable blades for mixing the Material and the impregnating agent may be formed. Furthermore, measuring and Provided control circuits, with which, for example, the pressure or the pressure change in the Impregnation monitored and the respective measured value is used, the Speed of an entry and discharge screw depending on the discontinued Material and impregnation to change so that the greatest possible Vacuum seal is guaranteed.
  • DE 196 17 384 A1 relates to an arrangement and a method for controlling the Mixing ratio of two gas flow rates through a Venturi nozzle on their Nozzle needle. It is about such a control that the specifiable Mixing ratio of the two gas flow rates is maintained.
  • DE 40 39 903 A1 relates to a device and a method for mixing steam with water.
  • a safe operation is achieved by one in one with water acted upon water pipe reduced an annular gap, to a differential pressure reached over the annular gap a certain value. Through the annular gap flows only the Water.
  • the invention is based on the object, an improved mixing method of the above described type and a static mixer to implement it, with which controls various substances even under adverse conditions are miscible.
  • the object of the invention is achieved by a mixing method with the Features of claim 1 and a static mixer with the features of Patent claim 9 solved.
  • the mixing work that means the energy consumption during mixing, proves to be a suitable criterion for achieving a sufficient mixing of to be mixed substances. It can be assumed that the mixing arrangement the individual proportions of the substances recorded evenly.
  • the mixing tools of the mixing assembly the For this purpose, for example, connected to actuators.
  • the mixed work of Mixing tools for example, be changed by the fact that they continue in the laterally limited flow into or out of this or within the Flow are twisted, which in each case the free cross-section and / or the course changed the free cross section of the flow. Typically, this corresponds to a smaller one becoming the free cross section of the flow of an increasing mixing work and vice versa.
  • At least one pressure in the flow can be determined.
  • the new mixing method is based on a pressure drop in the flow monitored the mixing assembly. This pressure drop is a direct measure of the mixing work, which is done by the mixing process. When a pressure drop in a certain Size results, this means that from the mixing process a certain mixing work per Volume of the guided through the mixing arrangement flow was made.
  • the pressure in the flow be measured before and after the mixing arrangement. The pressure drop is then the difference of these two pressures.
  • the pressure drop regardless of other parameters of the mixing process can be at a deviation of the pressure drop exceeding a limit from a predetermined desired value at least one mixing tool of the mixing arrangement be adjusted to correct the pressure drop.
  • the mixing arrangement becomes so for example, adapted to varying external parameters, to be independent of it always to perform the same mixing work per volume of the passing flow.
  • the new mixing method in which a liquid substance and a particulate solid substance to which the liquid substance to distribute, be passed by a gas flow through the mixing assembly.
  • the flow can also be a liquid flow and it can For example, two particulate solid substances are mixed together.
  • one of the substances to be mixed with each other may also be the flow entirely or partially train. It can also be several gaseous substances by the new Mixing methods are mixed together.
  • Substances is a liquid binder, which is based on lignocellulosic fibers is evenly distributed.
  • the new mixing method is suitable for gluing in a blow pipe be used, in which the binder on the moist emerging from a refiner Lignocelluslose containing fibers is distributed.
  • the new static mixer is characterized by the fact that the mixing tools are adjustable are the substances to be mixed together from the mixing arrangement currently working mixed work.
  • a measuring device for a pressure drop in the flow channel over the Mixed arrangement provided.
  • the measuring device includes each case a pressure probe in front of and behind the mixing arrangement in the flow channel.
  • the mixing arrangement of the new mixer includes in its preferred embodiments at least one such adjustable mixing tool, that the pressure drop of a flow in the flow channel over the mixing arrangement is changeable.
  • a control device may be provided, the input used as the pressure drop across the mixing arrangement, and at a deviation of the pressure drop from one exceeding a limit value preset setpoint the mixing tool adjusted.
  • the mixing arrangement can also comprise a plurality of adjustable tools which are actuated by the control device.
  • the flow channel the new mixer an inlet for a particulate solid substance promotional Gas flow and a spray nozzle for a on the particulate solid substance to distributing liquid substance.
  • the mixer in a blowpipe between a moist lignocellulosic fibers emitting refiner and a dryer for the Fibers can be arranged.
  • the injection nozzle for the liquid substance can be inside the Mixer upstream of the mixing assembly, within the mixing assembly and in certain Cases may even be arranged downstream of the mixing arrangement.
  • One position of the spray nozzle Downstream of the mixing arrangement comes into question when the with the mixing arrangement in the Flow induced turbulence of the particulate solid substance for distribution the subsequently sprayed liquid substance is sufficient.
  • a single injection nozzle can be provided. Rather, you can both individual spray nozzles at several different locations as well as several Injection nozzles may be provided at one or more locations of the mixer.
  • the static mixer 1 shown in longitudinal section in FIG. 1 has a laterally limited flow channel 2 which extends between two connecting flanges 3 and 4.
  • the opening of the flow channel 2 on the connection flange 3 forms an inlet 5 for a gas flow 6, which conveys a particulate solid substance, such as lignocellulosic fiber, through the flow channel 2 until it emerges from the static mixer 1 at an outlet 7 again is formed by an opening of the flow channel 2 at the containment flange 4.
  • the static mixer 1 has a connection flange 8, on which a Einsprühdüse not shown here can be fixed so that with her a liquid substance 9, such as a liquid binder, can be sprayed on the side of the gas flow 6 promoted particulate solid substance ,
  • a mixing assembly 10 is provided with a plurality of mixing tools 11 to 16 in the flow channel 2.
  • the mixing tools 11 to 16 fluidize the gas flow 6 passed through the mixing arrangement 10, so that the substances guided by the gas flow intimately mix with one another. This is synonymous with the desired distribution of the liquid substance 9 on the particulate solid substance with a particularly uniform distribution.
  • the mixing tools 11 to 16 in FIG. 1 are those 11 to 13, which bring about a local constriction of the cross section of the flow channel 2 from the outside, and those 14 to 16, which are arranged centrally in the flow channel 2.
  • the flow channel 2 is limited exclusively by a cylindrical tube 17 which extends between the connecting flanges 3 and 4.
  • the mixing work performed by the mixing assembly 10 on the gas flow 6 causes a pressure drop in the gas flow 6 over the mixing assembly 10. This pressure drop is measured with pressure probes 18 and 19 which detect the pressure of the gas flow 6 in front of and behind the mixing assembly 10.
  • the measuring signals 20 and 21 of the pressure probes 18 and 19 are the input signals of a monitoring and control device 22, which monitors the operation of the static mixer 1.
  • the monitoring and control device 22 sends activation signals 23 to 28 to the mixing tools 11 to 16, as a result of which the mixing tools 11 to 16 be adjusted so that they increase or decrease the pressure drop across the mixing assembly 10 as needed.
  • the mixing tools 11 to 13 further moved toward each other or further away from each other and the mixing tools 14 to 16 pivoted within the flow channel 2, which is indicated by double arrows.
  • the mixing work performed per volume of the gas flow is kept as constant as possible, so that the mixing result, for example the distribution of a liquid binder on lignocellulose-containing fibers, is as uniform as possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Engineering & Computer Science (AREA)
  • Forests & Forestry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Disintegrating Or Milling (AREA)
  • Paper (AREA)
EP04019796A 2003-09-11 2004-08-20 Procédé et dispositif de mélange statique, en particulier pour l'encollage des fibres lignocellulosiques en utilisant un liant Expired - Lifetime EP1514592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341960 2003-09-11
DE10341960A DE10341960B4 (de) 2003-09-11 2003-09-11 Mischverfahren und statischer Mischer, insbesondere zur Beleimung von lignocellulosehaltigen Fasern mit einem Bindemittel

Publications (2)

Publication Number Publication Date
EP1514592A1 true EP1514592A1 (fr) 2005-03-16
EP1514592B1 EP1514592B1 (fr) 2007-03-07

Family

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Application Number Title Priority Date Filing Date
EP04019796A Expired - Lifetime EP1514592B1 (fr) 2003-09-11 2004-08-20 Procédé et dispositif de mélange statique, en particulier pour l'encollage des fibres lignocellulosiques en utilisant un liant

Country Status (3)

Country Link
EP (1) EP1514592B1 (fr)
AT (1) ATE355890T1 (fr)
DE (2) DE10341960B4 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7281844B2 (en) * 2004-06-07 2007-10-16 Robert W Glanville Variable static mixer
EP2769762A1 (fr) * 2013-02-21 2014-08-27 Toyota Jidosha Kabushiki Kaisha Plaque de dispersion et appareil de dispersion
WO2015166232A1 (fr) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Appareil et procédé de chauffage, mélange et hydratation
WO2015166233A1 (fr) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Appareil et procédé de chauffage, de mélange et d'hydratation
DE102015107321A1 (de) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zum Beleimen von Fasern oder faserähnlichem Material
US10737227B2 (en) 2018-09-25 2020-08-11 Westfall Manufacturing Company Static mixer with curved fins
US11766807B2 (en) * 2017-01-15 2023-09-26 Michael George BUTLER Apparatuses and systems for and methods of generating and placing zero-slump-pumpable concrete

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006026124A1 (de) 2006-06-03 2007-12-06 Glunz Ag Verfahren und Vorrichtung zur Beleimung von Partikeln im Bereich eines Blasrohrs
CN111068536B (zh) * 2019-12-12 2022-03-01 陕西航天机电环境工程设计院有限责任公司 一种管道混合器
CN114789022A (zh) * 2022-05-11 2022-07-26 华夏中然生态科技集团有限公司 一种基于余活性氧浓度变化的加药量控制***

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099268A (en) * 1977-01-24 1978-07-04 Ingersoll-Rand Company Mixing device
DE19740676A1 (de) * 1997-09-16 1999-03-18 Fraunhofer Ges Forschung Verfahren zum Beleimen von Fasern
EP1166862A1 (fr) * 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mélangeur pour mélanger des gaz et d'autres liquides newtoniens
DE10216458C1 (de) * 2002-04-12 2003-06-26 F S Fehrer Automotive Foam Gmb Vorrichtung zum Mischen und/oder Durchleiten von Werkstoffkomponenten
DE10237341A1 (de) * 2002-08-14 2004-02-26 Siemens Ag Modell, Berechnung und Anwendung periodisch erzeugter Kantenwirbel im Turbomaschinenbau
WO2004035278A2 (fr) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation pour encoller des fibres destinees a la fabrication de plaques, notamment des panneaux mdf ou des panneaux analogues en materiau derive du bois
WO2004035279A1 (fr) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Dispositif et procede d'encollage de fibres destinees a la fabrication de panneaux de fibres, notamment de panneaux mdf
WO2004052603A1 (fr) * 2002-10-11 2004-06-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation d'encollage de fibres destinee a la production de panneaux de fibres, notamment de panneaux mdf

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Publication number Priority date Publication date Assignee Title
DE4039903A1 (de) * 1990-03-12 1991-09-19 Hoechst Ag Vorrichtung sowie verfahren zur mischung von dampf mit wasser
DE19617384A1 (de) * 1996-04-30 1997-11-06 Siemens Ag Anordnung und Verfahren zur Regelung des Mischungsverhältnisses zweier Gasvolumenströme durch eine Venturi-Düse über deren Düsennadel
DE19752005A1 (de) * 1997-11-24 1999-05-27 Gelhard Volker Dipl Ing Dipl W Vorrichtung und Verfahren zur Vermischung eines ersten Fluids mit einem zweiten Fluid
DE10139128A1 (de) * 2001-08-09 2003-02-27 Herbert Georg Nopper Vorrichtung und Verfahren zur Vakuumimprägnierung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099268A (en) * 1977-01-24 1978-07-04 Ingersoll-Rand Company Mixing device
DE19740676A1 (de) * 1997-09-16 1999-03-18 Fraunhofer Ges Forschung Verfahren zum Beleimen von Fasern
EP1166862A1 (fr) * 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mélangeur pour mélanger des gaz et d'autres liquides newtoniens
DE10216458C1 (de) * 2002-04-12 2003-06-26 F S Fehrer Automotive Foam Gmb Vorrichtung zum Mischen und/oder Durchleiten von Werkstoffkomponenten
DE10237341A1 (de) * 2002-08-14 2004-02-26 Siemens Ag Modell, Berechnung und Anwendung periodisch erzeugter Kantenwirbel im Turbomaschinenbau
WO2004035278A2 (fr) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation pour encoller des fibres destinees a la fabrication de plaques, notamment des panneaux mdf ou des panneaux analogues en materiau derive du bois
WO2004035279A1 (fr) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Dispositif et procede d'encollage de fibres destinees a la fabrication de panneaux de fibres, notamment de panneaux mdf
WO2004052603A1 (fr) * 2002-10-11 2004-06-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation d'encollage de fibres destinee a la production de panneaux de fibres, notamment de panneaux mdf

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7281844B2 (en) * 2004-06-07 2007-10-16 Robert W Glanville Variable static mixer
EP2769762A1 (fr) * 2013-02-21 2014-08-27 Toyota Jidosha Kabushiki Kaisha Plaque de dispersion et appareil de dispersion
WO2015166232A1 (fr) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Appareil et procédé de chauffage, mélange et hydratation
WO2015166233A1 (fr) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Appareil et procédé de chauffage, de mélange et d'hydratation
US10376852B2 (en) 2014-04-28 2019-08-13 Hydramach Limited Heating, mixing and hydrating apparatus and process
US10500551B2 (en) 2014-04-28 2019-12-10 Hydramach Limited Heating, mixing and hydrating apparatus and process
DE102015107321A1 (de) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zum Beleimen von Fasern oder faserähnlichem Material
US11766807B2 (en) * 2017-01-15 2023-09-26 Michael George BUTLER Apparatuses and systems for and methods of generating and placing zero-slump-pumpable concrete
US10737227B2 (en) 2018-09-25 2020-08-11 Westfall Manufacturing Company Static mixer with curved fins

Also Published As

Publication number Publication date
EP1514592B1 (fr) 2007-03-07
DE10341960A1 (de) 2005-04-14
DE10341960B4 (de) 2008-02-07
DE502004003109D1 (de) 2007-04-19
ATE355890T1 (de) 2007-03-15

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