EP3962636B1 - Buse d'injecteur, dispositif de mélange et utilisation de la buse d'injecteur - Google Patents

Buse d'injecteur, dispositif de mélange et utilisation de la buse d'injecteur Download PDF

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Publication number
EP3962636B1
EP3962636B1 EP20713538.5A EP20713538A EP3962636B1 EP 3962636 B1 EP3962636 B1 EP 3962636B1 EP 20713538 A EP20713538 A EP 20713538A EP 3962636 B1 EP3962636 B1 EP 3962636B1
Authority
EP
European Patent Office
Prior art keywords
fluid
closure body
nozzle opening
nozzle
injector nozzle
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.)
Active
Application number
EP20713538.5A
Other languages
German (de)
English (en)
Other versions
EP3962636A1 (fr
Inventor
Hermann Post
Markus Suschatz
Felix WIEDEMANN
Stephan WAHRENBURG
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3962636A1 publication Critical patent/EP3962636A1/fr
Application granted granted Critical
Publication of EP3962636B1 publication Critical patent/EP3962636B1/fr
Active legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0018—Devices for dispensing fibres in a fluid
    • 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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
    • B05B1/326—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve being a gate valve, a sliding valve or a cock
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D21C7/06—Feeding devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/08—Regulating consistency
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the invention relates to an injector nozzle for injecting a first fluid into a mixing zone through which a second fluid flows, with at least one nozzle opening, the cross section through which flow can be changed via a position-variable closure body.
  • the invention also relates to a mixing arrangement with an injector nozzle with at least one nozzle opening and the use of the injector nozzle and the mixing arrangement.
  • Such nozzles are used, among other things, in stock preparation in a paper mill to reduce or increase the consistency of the pulp suspensions or to add a chemical additive to the pulp suspension.
  • a certain consistency of the treated fiber suspension is set.
  • a dilution liquid e.g. backwater, is mixed into a thicker fiber suspension.
  • a high-consistency fibrous suspension it is also possible for a high-consistency fibrous suspension to be mixed into dilution water or a fibrous suspension with a very low consistency.
  • a mixing device for paper fiber suspensions is known, in particular for use in the feed line to the headbox. It is provided with an inner tube for one component and an outer tube for another component. The inner tube ends inside the outer one, so that mixing can take place downstream. This is supported by elaborate wave-shaped installations.
  • the DE 699 15 737 T2 describes a process for the approach flow system, which serves to mix several suspensions with different properties and in which a mixing tube is used. A large proportion of the white water of a paper machine is fed into this mixing tube as the main flow. In order to achieve a In order to form pulp suitable for the headbox of this paper machine, further suspension flows are mixed into the mixing tube. These are, for example, the fresh material coming from the stock preparation, i.e. a homogeneous pulp suspension free of impurities. In this publication it is recommended that the additional suspensions added to the main flow be added at a speed ratio that corresponds to a value between 3 and 15. With this state of the art, the propulsion jets are formed with suspensions of relatively high consistency.
  • the object of the invention is therefore to ensure the most trouble-free injection possible and the most intensive mixing of the fluids possible using relatively simple means.
  • the object was achieved in that the closure body is located on the side of the nozzle opening facing the mixing zone.
  • the size of the flow-through cross section of the nozzle opening and thus also the jet speed and the pressure loss for the first fluid can be adjusted via the position of the closure body.
  • the closure body Since the closure body is located on the side of the nozzle opening facing the mixing zone, the risk of clogging by fibers or foreign matter is significantly reduced.
  • the closure body is moved away from the nozzle opening, i.e. towards the mixing zone.
  • the closure body is moved towards the nozzle opening or even into the nozzle opening.
  • the closure body In order to make this change in cross-section and the change in position of the closure body as simple as possible, the closure body should be arranged concentrically to the nozzle opening and/or be displaceable via a closure body axis guided through the nozzle opening.
  • the cross section that can flow through between the nozzle opening and the closure body should vary in width around the nozzle opening. This also means that the effective range of the injection varies.
  • the flow-through cross section between the nozzle opening and the closure body is formed at least substantially, preferably exclusively, by a plurality of channels and each channel of the flow-through cross section is assigned a separate closure body wing, preferably detachably connected to a closure body axis of the closure body.
  • the cross section of the respective channel that can be flowed through can be changed and closed using the closure body wings.
  • closure body wings in particular are subject to high levels of wear, their replacement can be made possible via the detachable connection to the closure body axis, thus significantly extending the service life of the injector nozzle.
  • the channels must be as large as possible because of the fibers and the associated risk of clogging, but as small as possible to ensure the highest possible injection speed.
  • the channels should therefore be slot-shaped and preferably have a width between 30 and 60 mm.
  • the closure body in particular the closure body wings, should have a concave or convex shape on the side facing the nozzle opening in the flow direction of the first fluid.
  • the side of the closure body facing the nozzle opening in particular the closure body wing, forms an angle of between 30 and 75° with a closure body axis leading out of the nozzle opening.
  • the side of the closure body facing the nozzle opening in particular the closure body wing, to have flow profiles for influencing the flow of the first fluid.
  • the closure body in particular the closure body wings, should be detachably attached to the closure body axis, and in particular should also be hollow.
  • the closure body is at least partially applied, in particular its closure body wings completely, in layers from a liquid, pasty or solid material and subjected to a physical or chemical hardening or melting process. This enables a weight- and material-saving design of the construction.
  • the disruptive bodies are attached to the housing of the injector nozzle and at least one disruptive body encloses a part of the nozzle opening, in particular a channel.
  • the injector nozzle should be aligned at least substantially in the flow direction of the second fluid and the mixing zone should preferably be formed by a mixing tube through which the second fluid flows.
  • a preferred application results when the first fluid is formed by a fiber suspension whose fiber density is preferably between 2.5 and 4.5% and / or the second fluid is formed by water or a fiber suspension of low fiber density.
  • the mixing quality can be guaranteed over a wide production range.
  • An important application of the invention is the provision and conditioning of material flows in the constant part before a headbox of a paper machine.
  • a dilution liquid for example white water
  • the main flow (second fluid 2) is supplied as the main flow (second fluid 2) via an inlet.
  • the inlet is followed by a pipe bend in the flow direction of the dilution liquid, which has a curvature of at least 45°, in particular approximately 90°.
  • first fluid 1 is fed into the dilution liquid via another inlet with an injector nozzle 3, the consistency of which is in a range between 2 and 6%, in particular between 2.5 and 4.5%.
  • the mixing zone 4 following the merging of the two fluids 1, 2 lies in the straight pipe section following the pipe bend and can also have a static mixer, not shown here, to improve the mixing.
  • main flow (second fluid 2) can also be accelerated by reducing the cross-section in the area of the injector nozzle 3 for better mixing.
  • the highly consistent fiber suspension (first fluid 1) is fed at a flow velocity between 5 and 15 m/s and is higher than the flow velocity of the dilution liquid (fluid 2).
  • first fluid 1 reaches as far as possible into the center of the flow of the dilution liquid (second fluid 2)
  • second fluid 2 the injector nozzle 3 projects relatively far beyond the inner wall of the pipe bend.
  • the fiber suspension can be fed through a pipeline to a headbox of a machine for producing a fiber web, in particular a paper web.
  • the injector nozzle 3 for injecting the first fluid 1 into the mixing zone 4 through which the second fluid 2 flows has a nozzle opening 5, the flow-through cross section of which can be changed via a position-adjustable closure body 6.
  • the closure body 6 is located on the side of the nozzle opening 5 facing the mixing zone 4.
  • the closure body 6 is moved away from the nozzle opening in the flow direction of the fluid 1.
  • a movement of the closure body 6 against the flow direction of the fluid 1 towards the nozzle opening 5 leads to a reduction in the effective nozzle opening 5 and ultimately to its closure.
  • the closure body 6 is arranged concentrically to the nozzle opening 5 and can be displaced via a closure body axis 7 which leads out of the pipe bend through the nozzle opening 5.
  • the closure body 6 following the nozzle opening 5 proves to be advantageous for avoiding blockages due to the high fiber content.
  • the flowable cross section between the nozzle opening 5 and the closure body 6 is, as in Figure 2 As can be seen, it is formed by several slot-shaped channels 8 which extend radially from the closure body axis 7.
  • the number of channels 8 is between 2 and 10, preferably between 4 and 8 and the slot width between 30 and 60 mm.
  • each channel 8 is assigned a separate closure body wing 9 which is detachably connected to the closure body axis 7 of the closure body 6.
  • the closure body wings 9 can, as indicated, have a concave or convex shape on the side facing the nozzle opening 5 in the flow direction of the first fluid 1.
  • Flow profiles for influencing the flow of the first fluid 1, such as notches, barriers, etc., can also be arranged on this side of the closure body wings 9.
  • the disruptive bodies 11 are attached to the housing 10 of the injector nozzle 3, or as in Figure 4 to see, even part of the case 10.
  • each disruptive body 11 here comprises a part of the nozzle opening 5. Accordingly, in the solution according to Figure 4 From each disruptive body 11 one channel 8 leads into the mixing zone 4.
  • the housing 10 of the injector nozzle 3 as well as the closure body 6 can be at least partially made of metal or plastic, in particular fiber-reinforced plastic.
  • a dished bottom profile, into which slots for the channels 8 are milled, is particularly suitable as the housing 10.
  • the locking body wings 9 are detachably mounted on the locking body axis 7 and are hollow.
  • closure body wings 9 completely layer by layer from a liquid, pasty or solid material and subjecting them to a physical or chemical hardening or melting process.

Claims (15)

  1. Buse d'injecteur (3) servant à l'injection d'un premier fluide (1) dans une zone de mélange (4) traversée par un deuxième fluide (2), comportant au moins une ouverture de buse (5) dont la section transversale pouvant être traversée peut être modifiée par le biais d'un corps de fermeture (6) de position modifiable, le corps de fermeture (6) se trouvant sur le côté de l'ouverture de buse (5) tourné vers la zone de mélange (4), la section transversale pouvant être traversée étant formée par plusieurs canaux (8) entre l'ouverture de buse (5) et le corps de fermeture (6), caractérisée en ce qu'une aile de corps de fermeture distincte (9) est associée à chaque canal (8) de la section transversale pouvant être traversée.
  2. Buse d'injecteur (3) selon la revendication 1,
    caractérisée en ce que
    le corps de fermeture (6) est disposé de manière concentrique à l'ouverture de buse (5).
  3. Buse d'injecteur (3) selon la revendication 1 ou 2, caractérisée en ce que
    le corps de fermeture (6) est déplaçable par le biais d'un axe de corps de fermeture (7) guidé à travers l'ouverture de buse (5).
  4. Buse d'injecteur (3) selon l'une des revendications précédentes,
    caractérisée en ce que
    la section transversale pouvant être traversée varie en largeur autour de l'ouverture de buse (5) entre l'ouverture de buse (5) et le corps de fermeture (6).
  5. Buse d'injecteur (3) selon la revendication 1,
    caractérisée en ce que
    l'aile de corps de fermeture (9) est reliée de manière libérable à un axe (7) du corps de fermeture (6).
  6. Buse d'injecteur (3) selon la revendication 5, caractérisée
    en ce que les canaux (8) sont réalisés en forme de fentes.
  7. Buse d'injecteur (3) selon l'une des revendications précédentes,
    caractérisée en ce que
    le corps de fermeture (6) a une forme concave ou convexe sur le côté tourné vers l'ouverture de buse (5).
  8. Buse d'injecteur (3) selon l'une des revendications précédentes,
    caractérisée en ce que
    le côté, tourné vers l'ouverture de buse (5), du corps de fermeture (6) forme un angle entre 30 et 75° avec un axe de corps de fermeture (7) guidé hors de l'ouverture de buse (5).
  9. Buse d'injecteur (3) selon l'une des revendications précédentes,
    caractérisée en ce que
    le côté, tourné vers l'ouverture de buse (5), du corps de fermeture (6) présente des profilés d'écoulement servant à influencer l'écoulement du premier fluide (1).
  10. Buse d'injecteur (3) selon l'une des revendications précédentes,
    caractérisée en ce que
    le corps de fermeture (6) est réalisé de manière creuse.
  11. Ensemble de mélange comportant une buse d'injecteur (3) servant à l'injection d'un premier fluide (1) dans une zone de mélange (4) traversée par un deuxième fluide (2), comportant au moins une ouverture de buse (5) selon l'une des revendications précédentes,
    caractérisé en ce que
    des corps perturbateurs (11) pénètrent dans l'écoulement du deuxième fluide (2) en amont de la zone de mélange (4) dans le sens d'écoulement.
  12. Ensemble de mélange selon la revendication 11, caractérisé en ce que les corps perturbateurs (11) sont fixés au boîtier (10) de la buse d'injecteur (3).
  13. Ensemble de mélange selon la revendication 11 ou 12, caractérisé en ce qu'au moins un corps perturbateur (11) comprend une partie de l'ouverture de buse (5).
  14. Ensemble de mélange selon l'une des revendications 11 à 13, caractérisé en ce que la buse d'injecteur (3) est orientée dans le sens d'écoulement du deuxième fluide (2) et la zone de mélange (4) est formée par un tube de mélange traversé par le deuxième fluide (2).
  15. Utilisation d'une buse d'injecteur selon l'une des revendications précédentes, le premier fluide (1) étant formé par une suspension de matière fibreuse dont la densité de matière fibreuse se situe entre 2,5 et 4,5% et/ou le deuxième fluide (2) est formé par de l'eau ou une suspension de matière fibreuse de plus faible densité de matière fibreuse.
EP20713538.5A 2019-04-30 2020-03-16 Buse d'injecteur, dispositif de mélange et utilisation de la buse d'injecteur Active EP3962636B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019111122.6A DE102019111122A1 (de) 2019-04-30 2019-04-30 Injektordüse
PCT/EP2020/057122 WO2020221500A1 (fr) 2019-04-30 2020-03-16 Buse d'injecteur, dispositif de mélange et utilisation de la buse d'injecteur

Publications (2)

Publication Number Publication Date
EP3962636A1 EP3962636A1 (fr) 2022-03-09
EP3962636B1 true EP3962636B1 (fr) 2024-04-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20713538.5A Active EP3962636B1 (fr) 2019-04-30 2020-03-16 Buse d'injecteur, dispositif de mélange et utilisation de la buse d'injecteur

Country Status (4)

Country Link
EP (1) EP3962636B1 (fr)
CN (1) CN217266617U (fr)
DE (1) DE102019111122A1 (fr)
WO (1) WO2020221500A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1561697A1 (de) * 1967-04-15 1970-10-01 Voith Gmbh J M Verfahren zum kontinuierlichen Verduennen und/oder Mischen von langen,zum Verspinnen neigende Fasern enthaltenen Suspensionen und Vorrichtung zum Durchfuehren dieses Verfahrens
US3782884A (en) * 1972-05-09 1974-01-01 Standard Oil Co Acid gas burner
JPS5721019U (fr) * 1980-07-10 1982-02-03
FR2631353A1 (fr) * 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux
DE4306072C2 (de) * 1993-02-26 1994-12-08 Siemens Ag Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung
US5678766A (en) * 1995-07-19 1997-10-21 Peck; William E. Foam nozzle
DE19720528A1 (de) * 1997-05-16 1998-11-19 Gelhard Volker Dipl Ing Dipl W Vorrichtung und Verfahren zum Vermischen eines ersten Fluids mit einem zweiten Fluid
DE19859770A1 (de) 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Mischen von Sroffsuspension
FI114030B (fi) 1999-10-12 2004-07-30 Metso Paper Inc Menetelmä ja sovitelma paperinvalmistuksen massakomponenttien sekoittamiseksi
DE10232693A1 (de) * 2002-07-18 2004-02-05 Siemens Ag Einspritzventil
DE20321803U1 (de) 2003-04-09 2010-04-08 Voith Patent Gmbh Anordnung zum Zuführen einer zweiten Flüssigkeit zu einer Papierfaserstoffsuspension
DE102008012725A1 (de) * 2008-03-05 2009-09-24 United Waters International Ag Vorrichtung zur Begasung von Flüssigkeiten
DE102012212529A1 (de) * 2012-07-18 2014-01-23 Voith Patent Gmbh Sicherheitspapier-Konstantteil
NL2010972C2 (nl) * 2013-06-14 2014-12-31 Ecoscrub Solutions B V Voorbehandelingsinrichting voor een natte gaswasser.
JP6293643B2 (ja) * 2014-11-05 2018-03-14 株式会社東芝 ノズル装置及び処理装置
DE202017102911U1 (de) * 2017-05-15 2017-06-21 Evertz Hydrotechnik Gmbh & Co. Kg Vorrichtung zur Bewässerung von Fahrbahnen

Also Published As

Publication number Publication date
EP3962636A1 (fr) 2022-03-09
WO2020221500A1 (fr) 2020-11-05
DE102019111122A1 (de) 2020-11-05
CN217266617U (zh) 2022-08-23

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