EP2566611B1 - Procédé et installation de mélange - Google Patents

Procédé et installation de mélange Download PDF

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Publication number
EP2566611B1
EP2566611B1 EP11717982.0A EP11717982A EP2566611B1 EP 2566611 B1 EP2566611 B1 EP 2566611B1 EP 11717982 A EP11717982 A EP 11717982A EP 2566611 B1 EP2566611 B1 EP 2566611B1
Authority
EP
European Patent Office
Prior art keywords
fluid
main stream
nozzle
channel wall
mixing
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.)
Not-in-force
Application number
EP11717982.0A
Other languages
German (de)
English (en)
Other versions
EP2566611A1 (fr
Inventor
Thomas Jaschinski
Susanne Berger
Christian Bangert
Christian Naydowski
Volker Schmidt-Rohr
Martin Staiger
Michael Schwarz
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
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Voith Patent GmbH
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Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2566611A1 publication Critical patent/EP2566611A1/fr
Application granted granted Critical
Publication of EP2566611B1 publication Critical patent/EP2566611B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B01F25/30—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
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • 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
    • 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
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31422—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial direction only

Definitions

  • the invention relates to a method for mixing a plurality of fluids, of which at least one fluid is at least partially formed by a chemical, into a main flow delimited by a duct wall.
  • the invention also relates to a mixing arrangement for mixing at least a first and a second fluid via a respective nozzle having a nozzle opening, at least the second fluid is at least partially formed by a chemical in a limited main wall of a channel wall, in particular for carrying out the process.
  • the object of the invention is therefore to ensure the widest possible interference of a chemical in a main stream while avoiding deposits.
  • the second fluid which is preferably formed at least partially by a chemical, is injected at a distance from the channel wall into the main flow, a deposit in the region of this injection and at the channel wall is already counteracted. In addition, this also supports the mixing, as it is shifted away from the edge of the main stream away.
  • the mixing flow resulting from the injection of the first fluid into the main flow is deflected in the direction of flow of the main flow and thus flows around at least the nozzle, if possible also the nozzle opening of the second fluid, which likewise impedes deposition.
  • a flow around the nozzle opening for the second fluid protects the chemical from the heavy stress on exiting into the main stream. As a result, there is an intensive mixing of the two fluids with the main stream.
  • the invention offers particular advantages with regard to thorough mixing in a main stream formed by a pulp suspension for producing a paper, board, tissue or other fibrous web.
  • the application is also advantageous for main streams, etc. of process, fresh water. be formed.
  • the admixed fluids can be formed by chemicals, a pulp suspension or water, and depending on the nature and effect of a chemical, these may also be added in advance to the pulp suspension or the water.
  • the nozzle openings of the second and further fluid are arranged next to one another in the direction of flow of the main flow.
  • the entry points of these fluids in the main flow can be the same or different distances from the channel wall.
  • the distance of the nozzle opening of the second and further fluid to the channel wall should be between 5 mm and 10% of the maximum cross-sectional dimension of the main flow.
  • the inlet point of the second fluid encloses the inlet point of the further fluid or the nozzle for the further fluid.
  • the entry points of the fluid are juxtaposed, and in the other case, the point of entry of the further fluid extends further into the main flow than the entry point of the second fluid.
  • the fluids or the nozzle jet emanating from the nozzle should be injected at an angle between 10 and 170 °, preferably between 70 and 110 ° to the flow direction of the main stream.
  • the mixing arrangement it is essential that the second fluid nozzle extend into the main flow through the first fluid nozzle orifice beyond the channel wall.
  • the first fluid with the main flow forms a mixed flow, which flows around the nozzle and possibly also the nozzle opening of the second fluid with a direction component in the direction of the injection and in the flow direction of the main flow.
  • This mixed flow prevents deposits on the channel wall and the injection, which could emanate from the second fluid and also protects the chemical during the injection into the main flow.
  • the mixing of the second fluid in the main stream is promoted by this mixed stream.
  • the nozzle opening of the first fluid should be as close as possible to the channel wall, if possible with this form a plane.
  • the nozzles for the second and the further fluid can be guided with advantage through different nozzle openings for different or the same fluid in the main stream.
  • the distance between the nozzle openings of the second and further fluid to the channel wall may be the same or different.
  • the nozzles for the second and the further fluid together extend through the nozzle opening for the first fluid beyond the channel wall into the main stream.
  • the nozzle openings for the second and the further fluid in the flow direction of the main flow with equal or different distance to the channel wall are adjacent.
  • the nozzle for the further fluid extends through the nozzle opening for the second fluid in the main stream, wherein the nozzle openings have the same or a different distance from the channel wall.
  • the nozzle openings may have a round or square cross-section.
  • the nozzles can pierce the respective nozzle openings centrally or eccentrically.
  • the range of the jets depends in addition to the parameters of the main flow substantially from the fluid pressure at the nozzle opening, the jet area and their change over the length of the jet.
  • a lower fluid pressure as well as a strong broadening of the jet reduces the reach of the jet in the main stream. This offers the possibility to influence the range of the nozzle jets in the desired shape.
  • the nozzle jets can be inclined to the flow direction of the main stream, preferably inclined against this flow direction or aligned perpendicular to the flow direction of the main stream.
  • the main wall of the main wall limited flow has a round, in particular a circular cross-section.
  • FIGS. 1 to 4 schematic cross sections through various mixing arrangements.
  • the mixing arrangements shown here are used for admixing a plurality of fluids 1,2,3,4 to a main fluid stream 6 from a pulp suspension, which is guided in a tubular channel to a headbox of a machine for producing a fibrous web, in particular a paper web and a consistency between 0.05 and 7.0%, in particular between 0.2 and 2.5%.
  • Some fluids 2, 3 are in this case formed at least partially by chemicals, in particular retention aids, such as, for example, polyacrylamide, polyvinylamine, polyethylene oxide, fixing agents or even microparticles, for example bentonite or silicate.
  • retention aids such as, for example, polyacrylamide, polyvinylamine, polyethylene oxide, fixing agents or even microparticles, for example bentonite or silicate.
  • the fluids 1,2,3,4 can also be formed, at least in part, by pulp suspension or water (process or fresh water). If the fluids 1.4 consist entirely of pulp suspension or water, then they essentially serve to form turbulence in the main stream 6 and, in the case of water, to dilute the main stream 6.
  • the main stream 6 passes through one guided by a channel wall 5 channel with circular cross-section.
  • a plurality of mixing arrangements for admixing the fluids 1, 2, 3, 4 into the main flow 6 are preferably possible distributed regularly over the circumference of the channel.
  • FIG. 1 shown mixing arrangement which is not part of the invention is very simple and is essentially formed by two nozzles 11,12 which inject a first fluid 1 and a second fluid 2 transverse to the flow direction 7 of the main stream 6 in this.
  • At least the second fluid 2 consists partly of a chemical.
  • the nozzle opening 8 of the nozzle 11 for the first fluid 1 lies in the plane of the channel wall 5, which should prevent deposits in this inlet region of the fluid 1.
  • the nozzle 12 for the second fluid 2 is centrally guided into the main flow 6 through the nozzle opening 8 of the nozzle 11 of the first fluid 1.
  • the nozzle opening 9 of the nozzle 12 for the second fluid 2 is not only relatively deep in the main stream 6 but also relatively far away from the channel wall 5.
  • the first fluid 1 during injection into the main flow 6 forms a mixed flow with a component in and transverse to the flow direction 7 of the main flow 6, so that the nozzle 12 and the nozzle jet emanating from it are flowed around by the second fluid 2 by this mixed flow.
  • This also prevents deposits, protects the second fluid 2 when it exits into the main flow 6 and ensures intensive but gentle mixing of the two fluids 1, 2 with the main flow 6.
  • FIG. 2 shows FIG. 2 a mixing arrangement in which the second 2 and another 3 fluid at least partially formed by a chemical and is also injected perpendicular to the flow direction 7 of the main stream 6 in this.
  • the nozzles are 12,13 accordingly to that FIG. 1 described principle, each guided by a nozzle opening 8,15, which lies in the plane of the channel wall 5.
  • the first fluid 1 enters the main flow 6 via the nozzle 11 with the nozzle opening 8
  • another fluid 4 is injected into the main flow 6 via the nozzle 14 with the nozzle opening 15.
  • the first fluid 1 flows around the second fluid 2 and the fourth fluid 4 flows around the third fluid 3 during the injection.
  • the nozzle openings 9, 16 of the two nozzles 12, 13 are located equidistant from the channel wall 5.
  • the nozzles 12, 13 for the second 2 and the further fluid 3 are guided with at least one chemical through a common nozzle opening 8 of the nozzle 11 for the first fluid 1. Accordingly, both nozzles 12,13 and their jets with the two fluids 2,3 are flowed around by the, formed at the entrance of the first fluid 1 in the main stream 6 mixed flow. In this case, a nozzle 13 extends further into the main stream 6 than the other nozzle 12, which can provide additional turbulence and promote mixing.
  • the mixing arrangement according to FIG. 4 It is characteristic that the nozzle 12 for the second fluid 2 through the nozzle opening 8 of the nozzle 1 for the first fluid 1 and the nozzle 13 for the third fluid 3 is guided through the nozzle opening 9 of the nozzle 12 for the second fluid 2 in the main stream 6.
  • the nozzle opening 16 of the nozzle 3 for the third fluid 3 is further away from the channel wall 5 than the nozzle opening 9 of the nozzle 12 for the second fluid second This results in a flow around the second fluid 2 during the injection through the mixed flow from the first fluid 1 and a flow around the third fluid 3 during the injection through a mixed flow of the second fluid 2.
  • This flow protects in particular very long-chain chemicals, as they are exposed to the injection into the main stream 6 of a heavy load, which may affect their composition and function.
  • the fluids should be injected 1,2,3,4 with a pressure in this, which is between 1.5 and 10 bar above the pressure in the main stream 6.
  • the invention enables efficient mixing and mixing of multiple chemicals even with a large chemical-to-mainstream ratio.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Nozzles (AREA)

Claims (14)

  1. Procédé de mélange de plusieurs fluides (1, 2, 3, 4), dont au moins un fluide (2) est formé au moins en partie par un produit chimique, dans un flux principal (6) limité par une paroi de canal (5), un premier fluide (1) étant injecté dans le flux principal (6) au moins en partie dans la direction de l'écoulement (7) du flux principal (6) avant un deuxième fluide (2) et le point d'entrée du deuxième fluide (2) dans le flux principal (6) étant plus éloigné de la paroi de canal (5) que le point d'entrée du premier fluide (1) dans le flux principal (6), caractérisé en ce que d'autres fluides (3), qui sont formés au moins en partie par un produit chimique, sont injectés dans le flux principal (6), le premier fluide (1) est injecté dans le flux principal (6) au moins en partie dans la direction de l'écoulement (7) du flux principal (6) avant l'autre fluide (3) et le point d'entrée de l'autre fluide (3) dans le flux principal (6) est plus éloigné de la paroi de canal (5) que le point d'entrée du premier fluide (1) dans le flux principal (6).
  2. Procédé selon la revendication 1, caractérisé en ce que le deuxième fluide (2) est formé au moins en partie par un produit chimique.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le flux principal (6) est formé par une suspension fibreuse pour la fabrication d'une bande de papier, de carton, de papier tissu ou d'une autre bande fibreuse.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que le flux principal (6) est formé par de l'eau de traitement, de l'eau fraîche, ou autre.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le flux de mélange produit lors de l'injection du premier fluide (1) dans le flux principal (6) circule au moins en partie autour du deuxième fluide (2) lors de l'injection.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le point d'entrée de l'autre fluide (3) dans le flux principal (6) pénètre davantage dans le flux principal (6) que le point d'entrée du deuxième fluide (2).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les fluides (1, 2, 3, 4) sont injectés dans le flux principal (6) suivant un angle compris entre 10 et 170°, de préférence entre 70 et 110° par rapport à la direction de l'écoulement (7) du flux principal (6).
  8. Agencement de mélange pour mélanger au moins un premier (1) et un deuxième (2) fluide par le biais d'une buse respective (11, 12) avec une ouverture de buse (8, 9), dont au moins le deuxième fluide (2) est formé au moins en partie par un produit chimique, dans un flux principal (6) limité par une paroi de canal (5), la buse (12) pour le deuxième fluide (2) s'étendant à travers l'ouverture de buse (8) pour le premier fluide (1) au-delà de la paroi de canal (5) dans le flux principal (6), caractérisé en ce que d'autres fluides (3), qui peuvent être formés au moins en partie par un produit chimique, sont injectés à chaque fois par une buse supplémentaire (13) dans le flux principal (6) et la buse (13) pour l'autre fluide (3) s'étend dans le flux principal (6) à travers l'ouverture de buse (8) pour le premier fluide (1) au-delà de la paroi de canal (5).
  9. Agencement de mélange selon la revendication 8, caractérisé en ce que l'ouverture de buse (8) du premier fluide (1) est située aussi près que possible de la paroi de canal (5).
  10. Agencement de mélange selon la revendication 8 ou 9, caractérisé en ce que la buse (13) pour l'autre fluide (3) s'étend à travers l'ouverture de buse (9) pour le deuxième fluide (2) dans le flux principal (6).
  11. Agencement de mélange selon la revendication 8 ou 9, caractérisé en ce que d'autres fluides (3), qui sont formés au moins en partie par un produit chimique, sont injectés par le biais d'une buse supplémentaire respective (13) dans le flux principal (6) et les buses (12, 13) pour le deuxième (2) et l'autre (3) fluide s'étendent dans le flux principal (6) à travers différentes ouvertures de buse (8, 15) au-delà de la paroi de canal (5).
  12. Agencement de mélange selon l'une quelconque des revendications 8 à 11, caractérisé en ce que les jets de buse sortant des buses (12, 13, 14, 15) coupent la direction de l'écoulement (7) du flux principal (6) avec un angle compris entre 10 et 170°, de préférence entre 70 et 110°.
  13. Agencement de mélange selon l'une quelconque des revendications 8 à 12, caractérisé en ce que la buse (12, 13) traverse centralement l'ouverture de buse (8, 9, 15) d'une autre buse (11, 12, 14).
  14. Agencement de mélange selon l'une quelconque des revendications 8 à 12, caractérisé en ce que la buse (12, 13) traverse l'ouverture de buse (8, 9, 15) d'une autre buse (11, 12, 14) de manière décentrée.
EP11717982.0A 2010-05-05 2011-04-18 Procédé et installation de mélange Not-in-force EP2566611B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028573A DE102010028573A1 (de) 2010-05-05 2010-05-05 Mischverfahren
PCT/EP2011/056123 WO2011138162A1 (fr) 2010-05-05 2011-04-18 Procédé et installation de mélange

Publications (2)

Publication Number Publication Date
EP2566611A1 EP2566611A1 (fr) 2013-03-13
EP2566611B1 true EP2566611B1 (fr) 2014-06-11

Family

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EP11717982.0A Not-in-force EP2566611B1 (fr) 2010-05-05 2011-04-18 Procédé et installation de mélange

Country Status (4)

Country Link
EP (1) EP2566611B1 (fr)
CN (1) CN102971066B (fr)
DE (1) DE102010028573A1 (fr)
WO (1) WO2011138162A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130176814A1 (en) * 2010-09-28 2013-07-11 Dow Global Technologies Llc Reactive flow static mixer with cross flow obstructions
FI20125338L (fi) 2012-03-26 2013-09-27 Wetend Technologies Oy Menetelmä ja laitteisto kahden sähköiseltä varaukseltaan vastakkaisen kemikaalin syöttämiseksi prosessinestevirtaan
CN103212320B (zh) * 2013-03-19 2015-04-29 重庆科技学院 一种立式三喷嘴液体静态混合器
EP3174624A1 (fr) 2014-07-29 2017-06-07 Voith Paper Patent GmbH Heidenheim Procédé et dispositif destiné au dosage et à l'incorporation d'au moins un milieu fluide dans un flux de traitement
DE102014015036A1 (de) * 2014-10-09 2016-04-28 Steinmüller Babcock Environment Gmbh Oxidationsbecken und Verfahren zum Behandeln von Ablaufwasser eines Meerwasser-Abgaswäschers
CN112127191A (zh) * 2020-09-28 2020-12-25 新晃县自强纸业有限责任公司 一种用于利用废纸箱生产瓦楞芯纸的输送管道
CN112211019A (zh) * 2020-09-28 2021-01-12 新晃县自强纸业有限责任公司 利用废纸箱生产瓦楞芯纸的方法
CN116377165A (zh) * 2023-03-22 2023-07-04 江苏青云机械有限公司 强抗菌性不锈钢铸件工艺

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683266B1 (fr) * 1994-05-13 1997-09-17 Voith Sulzer Papiermaschinen GmbH Caisse de tête pour une machine à papier avec addition locale de fluide
FI123249B (fi) * 2004-07-15 2013-01-15 Wetend Technologies Oy Menetelmä ja laitteisto kemikaalin syöttämiseksi nestevirtaan

Also Published As

Publication number Publication date
CN102971066A (zh) 2013-03-13
EP2566611A1 (fr) 2013-03-13
CN102971066B (zh) 2016-08-03
DE102010028573A1 (de) 2011-11-10
WO2011138162A1 (fr) 2011-11-10

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