EP1514592A1 - Process and apparatus for static mixing, especially for the glueing of lignocellulosic fibers using a binder - Google Patents

Process and apparatus for static mixing, especially for the glueing of lignocellulosic fibers using a binder 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
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EP
European Patent Office
Prior art keywords
mixing
flow
pressure drop
arrangement
substances
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Application number
EP04019796A
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German (de)
French (fr)
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EP1514592B1 (en
Inventor
Wolfgang Stahl
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Glunz AG
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Glunz AG
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    • 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.

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  • 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)

Abstract

In a process to make chipboard wood particles are shredded and then mixed with a binding agent. The particles advance through a mixer (10) tunnel with mixer tools (11-16), at least one of which is at rest. The mixer tool positions are adjustable and regulate the mixer operation.

Description

Die Erfindung betrifft ein Mischverfahren mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 sowie einen statischen Mischer mit den Merkmalen des Oberbegriffs des Patentanspruchs 9.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.

STAND DER TECHNIKSTATE OF THE ART

Statische Mischer und aus ihrem Betrieb resultierende Mischverfahren sind aus vielen Anwendungsgebieten bekannt. In aller Regel werden die miteinander zu vermischenden Substanzen, bei denen es sich um teilchenförmige, feste Substanzen und/oder flüssige Substanzen handeln kann in einer Flüssigkeits- oder Gasströmung durch eine Mischanordnung hindurchgeführt, die für eine Verwirbelung der Strömung sorgt, welche ihrerseits zu der gewünschten Vermischung der Substanzen führt.Static mixers and mixing processes resulting from their operation are many Application areas known. As a rule, 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.

Bekannte statische Mischer verfügen über fest eingestellte Mischanordnungen. Als variable Betriebsparameter dienen die physikalischen Parameter der durch die statischen Mischer strömenden Strömung.Known static mixers have fixed mixing arrangements. As a variable Operating parameters serve the physical parameters of the static mixers flowing flow.

Bei der Herstellung von Faserplatten, insbesondere sogenannten mitteldichten Faserplatten (MDF) stellt die Beleimung der lignocellulosehaltigen Fasern mit dem Bindemittel ein bekanntes Problem dar. Zu Beginn der Entwicklung erfolgte die Beleimung in Trogmischern, was jedoch häufig zu Faseragglomeraten und -verfilzungen führte. Resultat war eine ungleichmäßige Faserbeleimung, die sich in der unerwünschten Ausbildung von Leimflecken an den Plattenoberflächen zeigte. In the production of fiberboard, in particular so-called medium-density fiberboard (MDF) adjusts the sizing of the lignocellulosic fibers with the binder known problem. At the beginning of the development, the gluing took place in pan mixers, However, this often led to fiber agglomerates and mattings. Result was one Uneven fiber sizing, resulting in the unwanted formation of glue spots showed on the plate surfaces.

Der aktuelle Stand der Technik bei der Beleimung von lignocellulosehaltigen Fasern für die Herstellung von Faserplatten ist die Beleimung in einer Blasleitung zwischen einem die feuchten lignocellulosehaltigen Fasern abgebenden Refiner und einem nachgeschalteten Trockner für die Fasern. Hierbei wird das Bindemittel im Eingangsbereich der Blasleitung hinter dem Refiner auf die von einer Gasströmung geführten nassen Fasern gesprüht. Dieses Beleimungsverfahren, das eine spezielle Form eines Mischverfahrens darstellt, weist den Nachteil auf, dass es mit einem erhöhten Bindemittelverbrauch verbunden ist, der um ca. 20 % über dem Bindemittelverbrauch bei der Trommelmischerbeleimung liegt. Trotz umfangreicher Untersuchungen konnten die eindeutigen Gründe für diesen erhöhten Bindemittelverbrauch nicht vollständig geklärt werden. Ein Grund mag darin liegen, dass eine ideal gleichmäßige Verteilung des Bindemittels auf den lignocellulosehaltigen Fasern, bevor diese in den Trockner eintreten, wodurch das Bindemittel auf den Fasern so weit fixiert wird, dass eine weitergehende Verteilung zumindest stark behindert ist, nicht erreicht wird.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. In this case, the binder in the entrance area of the blowpipe sprayed behind the refiner on the wet fibers guided by a gas flow. 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. In spite of Extensive investigations have revealed the clear reasons for this 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.

Man mag daran denken, die Vermischung des Bindemittels mit den Fasern, d.h. die Verteilung des Bindemittels auf den Fasern durch einen statischen Mischer in der Blasleitung zwischen dem Refiner und dem Trockner zu erhöhen. Dabei besteht aber die Gefahr eines Aufbaus von beleimten Fasern an den Mischwerkzeugen, wenn keine optimalen Betriebsbedingungen des statischen Mischers eingehalten werden. Dabei ist zu berücksichtigen, dass die Gasströmung durch die Blasleitung zwischen einem Refiner und einem Trockner von vielen verschiedenen äußeren Parametern abhängig ist und so als unabhängiger Steuerparameter für den Betrieb eines statischen Mischers an dieser Stelle kaum zur Verfügung steht.It may be remembered that the mixing of the binder with the fibers, i. the Distribution of the binder on the fibers through a static mixer in the blowpipe between the refiner and the dryer increase. But there is the danger of a Construction of glued fibers on the mixing tools, if not optimal Operating conditions of the static mixer are respected. It is too take into account that the gas flow through the blowpipe between a refiner and a dryer depends on many different external parameters and so on independent control parameter for the operation of a static mixer at this point is hardly available.

Die DE 197 40 676 C2 offenbart einen Turm als statischen Mischer für das Vermischen von Fasern und Bindemittel in einer seitlich begrenzten Strömung, in dem oder an dessen Wand Mittel zum Verwirbeln der Fasern angeordnet sind, die als Leitbleche, Schikanen oder dergleichen und verstellbar ausgebildet sein können. Zur Art und Weise der Verstellbarkeit solcher Mittel zum Verwirbeln der Fasern ist hier aber nichts ausgeführt.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.

Die DE 101 39 128 A1 offenbart eine Verfahren und eine Vorrichtung zum Vakuumimprägnieren von kleinteiligem Material in einer evakuierbaren Imprägnierkammer, die beispielsweise als drehbare Trommel mit verstellbaren Schaufeln zum Durchmischen des Materials und des Imprägniermittels ausgebildet sein kann. Weiterhin sind Mess- und Regelkreise vorgesehen, mit denen beispielsweise der Druck oder die Druckänderung in der Imprägnierkammer überwacht und der jeweilige Messwert dazu verwendet wird, die Drehzahl einer Eintrags- und Austragsschnecke in Abhängigkeit von der aufgegebenen Material- und Imprägniermenge so zu verändern, dass eine größtmögliche Vakuumabdichtung gewährleistet wird.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.

In der DE 197 52 005 A1 geht es darum, die Einmündung eines Dosierkanals für pulverförmiges Material in eine seitlich begrenzte Strömung dann zu verschließen, wenn die Gefahr besteht, dass die Strömung in den Dosierkanal eintritt, weil der Unterdruck im Mischbereich einen vorgegebenen Wert unterschreitet.In DE 197 52 005 A1 is about the confluence of a dosing channel for to close powdery material in a laterally limited flow then, if the There is a risk that the flow enters the dosing channel because the negative pressure in the Mixing range falls below a predetermined value.

Die DE 196 17 384 A1 betrifft eine Anordnung und ein Verfahren zur Regelung des Mischungsverhältnisses zweier Gasvolumenströme durch eine Venturi-Düse über deren Düsennadel. Dabei geht es um eine derartige Steuerung, dass das vorgebbare Mischungsverhältnis der beiden Gasvolumenströme eingehalten wird.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.

Die DE 40 39 903 A1 betrifft eine Vorrichtung sowie ein Verfahren zur Mischung von Dampf mit Wasser. Dabei wird eine gefahrlose Betriebsweise dadurch erreicht, dass man in einem mit Wasser beaufschlagten Wasserrohr einen Ringspalt verkleinert, bis ein Differenzdruck über den Ringspalt einen bestimmten Wert erreicht. Durch den Ringspalt strömt nur das Wasser.DE 40 39 903 A1 relates to a device and a method for mixing steam with water. Here, 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.

AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Mischverfahren der eingangs beschriebenen Art und einen statischen Mischer zu dessen Umsetzung aufzuzeigen, mit denen verschiedene Substanzen auch unter widrigen Randbedingungen kontrolliert mischbar sind.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.

LÖSUNGSOLUTION

Die Aufgabe der Erfindung wird erfindungsgemäß durch ein Mischverfahren mit den Merkmalen des Patentanspruchs 1 sowie einen statischen Mischer mit den Merkmalen des Patentanspruchs 9 gelöst. 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.

BESCHREIBUNG DER ERFINDUNGDESCRIPTION OF THE INVENTION

Bei dem neuen Mischverfahren wird die von der Mischanordnung auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit durch Verstellen der Mischwerkzeuge geregelt. Die Mischarbeit, dass heißt der Energieverbrauch beim Mischen, erweist sich als geeignetes Kriterium für das Erreichen einer hinreichenden Vermischung der zu vermischenden Substanzen. Dabei ist davon auszugehen, dass die Mischanordnung die einzelnen Anteile der Substanzen gleichmäßig erfasst. Um die Mischarbeit zu regeln, werden bei dem neuen Mischverfahren die Mischwerkzeuge der Mischanordnung verstellt, die zu diesem Zweck beispielsweise mit Stellaktuatoren verbunden sind. Die Mischarbeit von Mischwerkzeugen kann beispielsweise dadurch verändert werden, dass sie weiter in die seitlich begrenzte Strömung hinein oder aus dieser heraus bewegt oder innerhalb der Strömung verdreht werden, wodurch sich jeweils der freie Querschnitt und/oder der Verlauf des freien Querschnitts der Strömung verändert. Typischerweise entspricht dabei ein kleiner werdender freier Querschnitt der Strömung einer größer werdenden Mischarbeit und umgekehrt.In the new mixing process, that of the mixing arrangement is toward each other mixing substances currently performed mixing by adjusting the Controlled mixing tools. 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. To fix the mixed work, will be adjusted in the new mixing method, 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.

Als Maß für die von der Mischanordnung auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit kann mindestens ein Druck in der Strömung ermittelt werden. Bevorzugt wird das neue Mischverfahren anhand eines Druckabfalls in der Strömung über der Mischanordnung überwacht. Dieser Druckabfall ist ein direktes Maß für die Mischarbeit, die von dem Mischverfahren geleistet wird. Wenn sich ein Druckabfall in einer bestimmten Größe ergibt, bedeutet dies, dass von dem Mischverfahren eine bestimmte Mischarbeit pro Volumen der durch die Mischanordnung hindurchgeführten Strömung geleistet wurde.As a measure of the substances to be mixed together from the mixing arrangement currently applied mixing work, at least one pressure in the flow can be determined. Preferably, 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.

Zur Ermittlung des Druckabfalls über der Mischanordnung kann der Druck in der Strömung vor und nach der Mischanordnung gemessen werden. Der Druckabfall ist dann die Differenz dieser beiden Drücke.To determine the pressure drop across the mixing arrangement, the pressure in the flow be measured before and after the mixing arrangement. The pressure drop is then the difference of these two pressures.

Um den Druckabfall unabhängig von anderen Parametern des Mischverfahrens konstant zu halten, kann bei einer über einen Grenzwert hinausgehenden Abweichung des Druckabfalls von einem vorgegebenen Sollwert mindestens ein Mischwerkzeug der Mischanordnung verstellt werden, um den Druckabfall zu korrigieren. Die Mischanordnung wird damit beispielsweise an variierende äußere Parameter angepasst, um unabhängig hiervon immer dieselbe Mischarbeit pro Volumen der hindurchtretenden Strömung zu leisten. To constant 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.

Besonders bevorzugt sind Anwendungen des neuen Mischverfahrens, bei denen eine flüssige Substanz und eine teilchenförmige feste Substanz, auf der die flüssige Substanz zu verteilen ist, von einer Gasströmung durch die Mischanordnung hindurchgeführt werden. Grundsätzlich kann die Strömung aber auch eine Flüssigkeitsströmung sein und es können beispielsweise auch zwei teilchenförmige feste Substanzen miteinander vermischt werden. Überdies kann eine der miteinander zu vermischenden Substanzen auch die Strömung ganz oder teilweise ausbilden. Es können auch mehrere gasförmige Substanzen durch das neue Mischverfahren miteinander vermischt werden.Particularly preferred are applications of 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. In principle, however, the flow can also be a liquid flow and it can For example, two particulate solid substances are mixed together. Moreover, 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.

Besonders bevorzugt ist es jedoch, wenn es sich bei den miteinander zu vermischenden Substanzen um ein flüssiges Bindemittel handelt, das auf lignocellulosehaltigen Fasern gleichmäßig zu verteilen ist.It is particularly preferred, however, if it is in the intermixed with each other Substances is a liquid binder, which is based on lignocellulosic fibers is evenly distributed.

Das neue Mischverfahren ist dazu geeignet, bei der Beleimung in einer Blasleitung eingesetzt zu werden, bei der das Bindemittel auf die feucht aus einem Refiner austretenden lignocelluslosehaltigen Fasern verteilt wird.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.

Der neue statische Mischer zeichnet sich dadurch aus, dass die Mischwerkzeuge verstellbar sind, um die von der Mischanordnung auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit zu regeln.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.

Zur Bestimmung eines Maßes für die von der Mischanordnung auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit kann der neue Mischer eine Messeinrichtung für mindestens einen Druck in dem Strömungskanal aufweisen.To determine a measure of that of the mixing assembly to each other Mixing work actually performed mixing the new mixer one Have measuring device for at least one pressure in the flow channel.

Bevorzugt ist eine Messeinrichtung für einen Druckabfall in dem Strömungskanal über der Mischanordnung vorgesehen. Typischerweise umfasst die Messeinrichtung dabei jeweils eine Drucksonde vor und hinter der Mischanordnung in dem Strömungskanal.Preferably, a measuring device for a pressure drop in the flow channel over the Mixed arrangement provided. Typically, the measuring device includes each case a pressure probe in front of and behind the mixing arrangement in the flow channel.

Die Mischanordnung des neuen Mischers umfasst in ihrer bevorzugten Ausführungsformen mindestens ein derart verstellbares Mischwerkzeug, dass der Druckabfall einer Strömung in dem Strömungskanal über der Mischanordnung veränderbar ist.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.

Für die Verstellung dieses Mischwerkzeugs kann eine Steuereinrichtung vorgesehen sein, die als Eingangssignal den Druckabfall über der Mischanordnung verwendet, und die bei einer über einen Grenzwert hinausgehenden Abweichung des Druckabfalls von einem vorgegebenen Sollwert das Mischwerkzeug verstellt. Die Mischanordnung kann auch mehrere verstellbare Werkzeuge aufweisen, die von der Steuereinrichtung betätigt werden.For the adjustment of this mixing tool, 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.

In einer besonders interessierenden konkreten Ausführungsform weist der Strömungskanal des neuen Mischers einen Einlass für eine eine teilchenförmige feste Substanz fördernde Gasströmung und eine Einsprühdüse für eine auf der teilchenförmigen feste Substanz zu verteilende flüssige Substanz auf. Dabei kann der Mischer in einer Blasleitung zwischen einem feuchte lignocelluloshaltige Fasern abgebenden Refiner und einem Trockner für die Fasern angeordnet sein. Die Einsprühdüse für die flüssige Substanz kann innerhalb des Mischers stromauf der Mischanordnung, innerhalb der Mischanordnung und in bestimmten Fällen sogar stromab der Mischanordnung angeordnet sein. Eine Lage der Einsprühdüse stromab der Mischanordnung kommt dann in Frage, wenn die mit der Mischanordnung in der Strömung induzierte Verwirbelung der teilchenförmigen festen Substanz für eine Verteilung der erst anschließend aufgesprühten flüssigen Substanz ausreichend ist. Bei einer Anordnung der Einsprühdüse innerhalb der Mischanordnung kann die Einsprühdüse auch im unmittelbaren Bereich eines einzelnen Mischwerkzeugs in den Strömungskanal einmünden. Ganz allgemein kann nicht nur eine einzige Einsprühdüse vorgesehen sein. Vielmehr können sowohl einzelne Einsprühdüsen an mehreren unterschiedlichen Orten als auch mehrere Einsprühdüsen an einem oder mehreren Orten des Mischers vorgesehen sein.In a particularly interesting concrete embodiment, 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. In this case, 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. At a Arrangement of the injection nozzle within the mixing arrangement, the injection nozzle in the Open the immediate area of a single mixing tool in the flow channel. In general, not only 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.

KURZBESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Im Folgenden wird die Erfindung anhand eines in den Figuren dargestellten bevorzugten Ausführungsbeispiel des neuen statischen Mischers weiter erläutert und beschrieben.

Fig. 1
zeigt einen Längsschnitt durch eine Ausführungsform des neuen statischen Mischers.
In the following, the invention will be further explained and described with reference to a preferred embodiment of the new static mixer shown in the figures.
Fig. 1
shows a longitudinal section through an embodiment of the new static mixer.

FIGURENBESCHREIBUNGDESCRIPTION OF THE FIGURES

Der in Fig. 1 im Längsschnitt dargestellte statische Mischer 1 weist einen seitlich begrenzten Strömungskanal 2 auf, der sich zwischen zwei Anschlussflanschen 3 und 4 erstreckt. Die Öffnung des Strömungskanals 2 an dem Anschlussflansch 3 bildet einen Einlass 5 für eine Gasströmung 6 aus, die eine teilchenförmige feste Substanz, beispielsweise lignocellulosehaltige Faser, durch den Strömungskanal 2 hindurchfördert, bis sie an einem Auslass 7 wieder aus dem statischen Mischer 1 heraustritt, der von einer Öffnung des Strömungskanals 2 an dem Einschlussflansch 4 gebildet wird. Zusätzlich weist der statische Mischer 1 einen Anschlussflansch 8 auf, an dem eine hier nicht dargestellte Einsprühdüse so befestigt werden kann, dass mit ihr ein flüssige Substanz 9, beispielsweise ein flüssiges Bindemittel, auf die von der Gasströmung 6 geförderte teilchenförmige feste Substanz seitlich aufgesprüht werden kann. Um dabei eine besonders gleichmäßige Verteilung der flüssigen Substanz 9 auf der von der Gasströmung 6 geführten teilchenförmigen festen Substanz zu erreichen, ist in dem Strömungskanal 2 eine Mischanordnung 10 mit mehreren Mischwerkzeugen 11 bis 16 vorgesehen. Die Mischwerkzeuge 11 bis 16 verwirbeln die durch die Mischanordnung 10 hindurchgeführte Gasströmung 6, so dass sich die von der Gasströmung geführten Substanzen innig miteinander vermischen. Dies ist bei der gewünschten Verteilung der flüssigen Substanz 9 auf der teilchenförmigen festen Substanz mit einer besonders gleichmäßigen Verteilung gleichbedeutend. Bei den Mischwerkzeugen 11 bis 16 handelt es sich in Fig. 1 beispielhaft um solche 11 bis 13, die eine lokale Verengung des Querschnitts des Strömungskanals 2 von außen bewirken, und solche 14 bis 16, die mittig in dem Strömungskanal 2 angeordnet sind. Neben den Mischwerkzeugen 11 bis 16 wird der Strömungskanal 2 ausschließlich durch ein zylindrisches Rohr 17 begrenzt, das sich zwischen den Anschlussflanschen 3 und 4 erstreckt. Die von der Mischanordnung 10 auf die Gasströmung 6 ausgeübte Mischarbeit bewirkt einen Druckabfall in der Gasströmung 6 über der Mischanordnung 10. Dieser Druckabfall wird mit Drucksonden 18 und 19 gemessen, die den Druck der Gasströmung 6 vor und hinter der Mischanordnung 10 erfassen. Die Messsignale 20 und 21 der Drucksonden 18 und 19 sind die Eingangssignale einer Überwachungs- und Steuereinrichtung 22, die den Betrieb des statischen Mischers 1 überwacht. Wenn der anhand der Messsignale 20 und 21 festgestellte Druckabfall über der Mischanordnung 10 von einem vorgegebenen Sollwert über ein vorgegebenes Maß hinaus abweicht, sendet die Überwachungs- und Steuereinrichtung 22 Ansteuersignale 23 bis 28 an die Mischwerkzeuge 11 bis 16 aus, wodurch die Mischwerkzeuge 11 bis 16 so verstellt werden, dass sie je nach Bedarf den Druckabfall über der Mischanordnung 10 erhöhen oder absenken. Hierzu werden beispielsweise die Mischwerkzeuge 11 bis 13 weiter aufeinander zu oder weiter voneinander weg bewegt und die Mischwerkzeuge 14 bis 16 innerhalb des Strömungskanals 2 verschwenkt, was jeweils durch Doppelpfeile angedeutet ist. So wird bei dem statischen Mischer 1 auch bei variierenden Parametern der Gasströmung 6 die jeweils pro Volumen der Gasströmung verrichtete Mischarbeit möglichst konstant gehalten, so dass das Mischungsergebnis, beispielsweise konkret die Verteilung eines flüssigen Bindemittels auf lignocellulosehaltigen Fasern möglichst gleichmäßig ist. 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. In addition, 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 , In order to achieve a particularly uniform distribution of the liquid substance 9 on the guided from the gas flow 6 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. By way of example, 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. In addition to the mixing tools 11 to 16, 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. If the pressure drop across the mixing arrangement 10, which has been determined based on the measurement signals 20 and 21, deviates from a predefined setpoint value beyond a predefined amount, 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. For this purpose, for example, 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. Thus, in the case of the static mixer 1, even with varying parameters of the gas flow 6, 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.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Mischermixer
22
Strömungskanalflow channel
33
Anschlussflanschflange
44
Anschlussflanschflange
55
Einlassinlet
66
Gasströmunggas flow
77
Auslassoutlet
88th
Anschlussflanschflange
99
Substanzsubstance
1010
Mischanordnungmixing arrangement
2121
Messsignalmeasuring signal
2222
Überwachungs- und SteuereinrichtungSurveillance and control device
2323
Ansteuersignalcontrol signal
2424
Ansteuersignalcontrol signal
2525
Ansteuersignalcontrol signal
2626
Ansteuersignalcontrol signal
2727
Ansteuersignalcontrol signal
2828
Ansteuersignalcontrol signal
1111
Mischwerkzeugmixing tool
1212
Mischwerkzeugmixing tool
1313
Mischwerkzeugmixing tool
1414
Mischwerkzeugmixing tool
1515
Mischwerkzeugmixing tool
1616
Mischwerkzeugmixing tool
1717
Rohrpipe
1818
Drucksondepressure probe
1919
Drucksondepressure probe
2020
Messsignalmeasuring signal

Claims (16)

Mischverfahren, wobei miteinander zu vermischende Substanzen in einer seitlich begrenzten Strömung durch eine Mischanordnung mit mindestens einem ruhenden und verstellbaren Mischwerkzeug hindurchgeführt werden, dadurch gekennzeichnet, dass die von der Mischanordnung (10) auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit durch Verstellen der Mischwerkzeuge (11 bis 16) geregelt wird.Mixing method, wherein substances to be mixed with each other are passed in a laterally limited flow through a mixing arrangement with at least one stationary and adjustable mixing tool, characterized in that the mixing work currently exerted by the mixing assembly (10) on the substances to be mixed together by adjusting the mixing tools ( 11 to 16) is regulated. Mischverfahren nach Anspruch 1, dadurch gekennzeichnet, dass mindestens ein Druck in der Strömung als Maß für die von der Mischanordnung (10) auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit ermittelt wird.Mixing method according to claim 1, characterized in that at least one pressure in the flow is determined as a measure of the mixing work currently being performed by the mixing arrangement (10) on the substances to be mixed together. Mischverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Druckabfall in der Strömung über der Mischanordnung (10) ermittelt wird und dass das Mischverfahren anhand des Druckabfalls überwacht wird.Mixing method according to claim 1 or 2, characterized in that a pressure drop in the flow over the mixing assembly (10) is determined and that the mixing method is monitored by means of the pressure drop. Mischverfahren nach Anspruch 3, dadurch gekennzeichnet, dass zur Ermittlung des Druckabfalls der Druck in der Strömung vor und nach der Mischanordnung (10) gemessen wird.Mixing method according to claim 3, characterized in that to determine the pressure drop, the pressure in the flow before and after the mixing device (10) is measured. Mischverfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass bei einer über einen Grenzwert hinausgehenden Abweichung des Druckabfalls von einem vorgegebenen Sollwert mindestens ein Mischwerkzeug (11 bis 16) der Mischanordnung (10) verstellt wird, um den Druckabfall zu korrigieren.Mixing method according to claim 3 or 4, characterized in that at a more than a limit beyond the pressure drop from a predetermined setpoint at least one mixing tool (11 to 16) of the mixing assembly (10) is adjusted to correct the pressure drop. Mischverfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine flüssige Substanz (9) und eine teilchenförmige feste Substanz, auf der die flüssige Substanz zu verteilen ist, von einer Gasströmung (6) durch die Mischanordnung (10) hindurchgeführt werden. Mixing method according to one of claims 1 to 5, characterized in that a liquid substance (9) and a particulate solid substance, on which the liquid substance is to be distributed, are guided by a gas flow (6) through the mixing arrangement (10). Mischverfahren nach Anspruch 6, dadurch gekennzeichnet, dass die flüssige Substanz (9) ein Bindemittel ist und die teilchenförmige feste Substanz aus lignocellulosehaltigen Fasern besteht.Mixing method according to claim 6, characterized in that the liquid substance (9) is a binder and the particulate solid substance consists of lignocellulose-containing fibers. Mischverfahren nach Anspruch 7, dadurch gekennzeichnet, dass das Bindemittel auf die feucht aus einem Refiner austretenden lignocellulosehaltigen Fasern verteilt wird.Mixing method according to claim 7, characterized in that the binder is distributed to the wet issuing from a refiner lignocellulosic fibers. Statischer Mischer für das Vermischen von Substanzen in einer seitlich begrenzten Strömung, insbesondere zur Durchführung eines Mischverfahrens nach einem der Ansprüche 1 bis 8, mit einem seitlich begrenzten Strömungskanal, in dem eine Mischanordnung mit mindestens einem ruhenden und verstellbaren Mischwerkzeug angeordnet ist, dadurch gekennzeichnet, dass eine Steuereinrichtung (22) die Mischwerkzeuge (11 bis 16) verstellt, um die von der Mischanordnung (10) auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit zu regeln.Static mixer for the mixing of substances in a laterally limited flow, in particular for carrying out a mixing method according to one of claims 1 to 8, with a laterally delimited flow channel, in which a mixing arrangement is arranged with at least one stationary and adjustable mixing tool, characterized in that a control device (22) adjusts the mixing tools (11 to 16) in order to control the mixing work actually carried out by the mixing arrangement (10) on the substances to be mixed with one another. Mischer nach Anspruch 9, dadurch gekennzeichnet, dass eine Messeinrichtung für mindestens einen Druck in dem Strömungskanal (2) als Maß für die von der Mischanordnung (10) auf die miteinander zu vermischenden Substanzen aktuell ausgeübte Mischarbeit vorgesehen ist.Mixer according to claim 9, characterized in that a measuring device is provided for at least one pressure in the flow channel (2) as a measure of the mixing work currently being performed by the mixing arrangement (10) on the substances to be mixed together. Mischer nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass eine Messeinrichtung für einen Druckabfall in dem Strömungskanal (2) über der Mischanordnung (10) vorgesehen ist.Mixer according to claim 9 or 10, characterized in that a measuring device for a pressure drop in the flow channel (2) is provided above the mixing arrangement (10). Mischer nach Anspruch 11, dadurch gekennzeichnet, dass die Messeinrichtung jeweils eine Drucksonde (18, 19) vor und hinter der Mischanordnung (10) in dem Strömungskanal (2) aufweist.Mixer according to claim 11, characterized in that the measuring device in each case has a pressure probe (18, 19) in front of and behind the mixing arrangement (10) in the flow channel (2). Mischer nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass mindestens ein Mischwerkzeug (11 bis 16) der Mischanordnung (10) so verstellbar ist, dass sich der Druckabfall einer Strömung in dem Strömungskanal (2) über der Mischanordnung (10) ändert. Mixer according to claim 11 or 12, characterized in that at least one mixing tool (11 to 16) of the mixing arrangement (10) is adjustable so that the pressure drop of a flow in the flow channel (2) above the mixing arrangement (10) changes. Mischer nach Anspruch 13, dadurch gekennzeichnet, dass die Steuereinrichtung (22) bei einer über einen Grenzwert hinausgehenden Abweichung des Druckabfalls von einem vorgegebenen Sollwert mindestens ein Mischwerkzeug (11 bis 16) der Mischanordnung (10) verstellt.Mixer according to claim 13, characterized in that the control device (22) adjusts at least one mixing tool (11 to 16) of the mixing arrangement (10) in the event of a deviation of the pressure drop exceeding a limit value from a predetermined desired value. Mischer nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, dass der Strömungskanal (2) einen Einlass (5) für eine eine teilchenförmige feste Substanz fördernde Gasströmung (6) und eine Einsprühdüse für eine auf der teilchenförmigen festen Substanz zu verteilende flüssige Substanz (9) aufweist.Mixer according to one of claims 9 to 14, characterized in that the flow channel (2) has an inlet (5) for a particulate solid substance-promoting gas flow (6) and a spray nozzle for a liquid substance (9) to be distributed on the particulate solid substance ) having. Mischer nach Anspruch 15, dadurch gekennzeichnet, dass er in einer Blasleitung zwischen einem feuchte lignocellulosehaltige Fasern abgebenden Refiner und einem Trockner für die Fasern angeordnet ist.Mixer according to claim 15, characterized in that it is arranged in a blowing line between a moist lignocellulosic fibers emitting refiner and a dryer for the fibers.
EP04019796A 2003-09-11 2004-08-20 Process and apparatus for static mixing, especially for the glueing of lignocellulosic fibers using a binder Not-in-force EP1514592B1 (en)

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* Cited by examiner, † Cited by third party
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US7281844B2 (en) * 2004-06-07 2007-10-16 Robert W Glanville Variable static mixer
EP2769762A1 (en) * 2013-02-21 2014-08-27 Toyota Jidosha Kabushiki Kaisha Dispersion plate and dispersion apparatus
WO2015166232A1 (en) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Heating, mixing and hydrating apparatus and process
WO2015166233A1 (en) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Heating, mixing and hydrating apparatus and process
DE102015107321A1 (en) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Apparatus and method for gluing fibers or fiber-like 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 (en) 2006-06-03 2007-12-06 Glunz Ag Method and device for gluing particles in the region of a blower tube
CN111068536B (en) * 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 Pipeline mixer
CN114789022A (en) * 2022-05-11 2022-07-26 华夏中然生态科技集团有限公司 Medicine adding amount control system based on residual active oxygen concentration change

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 (en) * 1997-09-16 1999-03-18 Fraunhofer Ges Forschung Fiber adhesive coating method
EP1166862A1 (en) * 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mixer for mixing gases and other Newtonian liquids
DE10216458C1 (en) * 2002-04-12 2003-06-26 F S Fehrer Automotive Foam Gmb Bi-component mixer, e.g. for making polyurethane seat cushions, has chamber with rotatable flow guides to give clear passage to ejector piston
DE10237341A1 (en) * 2002-08-14 2004-02-26 Siemens Ag Finite vortex model for use in fluid flow numerical simulation, especially for modeling unsteady flows, whereby a general roll-off model is used to model the finite edge vortex
WO2004035279A1 (en) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg System and method for glueing fibres for the production of fibre plates, especially mdf plates
WO2004035278A2 (en) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation for sizing fibres for the production of fibreboard, especially medium density fibreboard plates or similar plates consisting of derived timber products
WO2004052603A1 (en) * 2002-10-11 2004-06-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation for coating fibers with glue for producing fiberboards, especially mdf boards

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4039903A1 (en) * 1990-03-12 1991-09-19 Hoechst Ag Heating appts. with variable heating for chemical processes - comprises steam pipe and perforated nozzle, water pipe and cylinder with conical ends and discharge pipe
DE19617384A1 (en) * 1996-04-30 1997-11-06 Siemens Ag Regulator of mixt. ratio of two gas vol. flows through Venturi nozzle
DE19752005A1 (en) * 1997-11-24 1999-05-27 Gelhard Volker Dipl Ing Dipl W Powder outlet tube to liquid mixer
DE10139128A1 (en) * 2001-08-09 2003-02-27 Herbert Georg Nopper Device and method for vacuum impregnation

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 (en) * 1997-09-16 1999-03-18 Fraunhofer Ges Forschung Fiber adhesive coating method
EP1166862A1 (en) * 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mixer for mixing gases and other Newtonian liquids
DE10216458C1 (en) * 2002-04-12 2003-06-26 F S Fehrer Automotive Foam Gmb Bi-component mixer, e.g. for making polyurethane seat cushions, has chamber with rotatable flow guides to give clear passage to ejector piston
DE10237341A1 (en) * 2002-08-14 2004-02-26 Siemens Ag Finite vortex model for use in fluid flow numerical simulation, especially for modeling unsteady flows, whereby a general roll-off model is used to model the finite edge vortex
WO2004035279A1 (en) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg System and method for glueing fibres for the production of fibre plates, especially mdf plates
WO2004035278A2 (en) * 2002-10-11 2004-04-29 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation for sizing fibres for the production of fibreboard, especially medium density fibreboard plates or similar plates consisting of derived timber products
WO2004052603A1 (en) * 2002-10-11 2004-06-24 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Installation for coating fibers with glue for producing fiberboards, especially mdf boards

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 (en) * 2013-02-21 2014-08-27 Toyota Jidosha Kabushiki Kaisha Dispersion plate and dispersion apparatus
WO2015166232A1 (en) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Heating, mixing and hydrating apparatus and process
WO2015166233A1 (en) * 2014-04-28 2015-11-05 Cambridge Research & Development Limited Heating, mixing and hydrating apparatus and process
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 (en) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Apparatus and method for gluing fibers or fiber-like 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

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DE10341960A1 (en) 2005-04-14
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DE10341960B4 (en) 2008-02-07
ATE355890T1 (en) 2007-03-15

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