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WO2011138162A1 - Procédé et installation de mélange - Google Patents

Procédé et installation de mélange Download PDF

Info

Publication number
WO2011138162A1
WO2011138162A1 PCT/EP2011/056123 EP2011056123W WO2011138162A1 WO 2011138162 A1 WO2011138162 A1 WO 2011138162A1 EP 2011056123 W EP2011056123 W EP 2011056123W WO 2011138162 A1 WO2011138162 A1 WO 2011138162A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
main stream
nozzle
main
channel wall
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.)
Ceased
Application number
PCT/EP2011/056123
Other languages
German (de)
English (en)
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
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
Priority to CN201180033346.6A priority Critical patent/CN102971066B/zh
Priority to EP11717982.0A priority patent/EP2566611B1/fr
Publication of WO2011138162A1 publication Critical patent/WO2011138162A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—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 with a
  • Nozzle opening of which at least the second fluid is at least partially formed by a chemical in a bounded by a channel wall main flow, in particular for carrying out the method.
  • the object of the invention is therefore to ensure the widest possible interference of a chemical in a main stream while avoiding deposits.
  • the object with regard to the method has been achieved in that a first fluid is at least partially injected in the flow direction of the main flow before a second fluid in the main stream and the point of entry of the second fluid in the main flow is further away from the channel wall than the inlet point of the first fluid in the mainstream.
  • the second fluid which is preferably at least partially formed by a chemical, is injected into the main stream at a distance from the channel wall, deposition 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 mixed 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.
  • 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. If, in addition to the second, further fluids are to be injected and mixed into the main stream, which are at least partially formed by a chemical, it is advantageous if the first fluid is at least partially in
  • Flow direction of the main stream is injected before the other fluid in the main stream and the entry point of the other fluid in the main flow is further away from the channel wall than the inlet point of the first fluid in the
  • Flow direction of the main flow are arranged side by side. Depending on the degree of mixing desired and Verwirblung 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 of between 10 and 170 °, preferably between 70 and 110 ° to the flow direction of the main flow.
  • Main current extends.
  • the first fluid with the main flow forms a mixed flow, which the nozzle and possibly also the nozzle opening of the second fluid with a directional component in the direction of the injection and in
  • 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.
  • 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
  • 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.
  • Nozzle jets inclined to the flow direction of the main stream preferably inclined against this flow direction or perpendicular to the
  • the main flow delimited by the channel wall has a round, in particular a circular cross-section.
  • angular, in particular rectangular cross sections are appropriate. This is especially true when the
  • Main flow leading channel wall is open at the top.
  • Figures 1 to 4 show schematic cross sections through various mixing arrangements.
  • the mixing arrangements shown here serve for admixing a plurality of fluids 1, 2, 3, 4 to a main fluid flow 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 hereby at least partially of chemicals, in particular retention agents, such as polyacrylamide, polyvinylamine, polyethylene oxide, fixatives or even of microparticles, such. Bentonite or silicate formed.
  • retention agents such as polyacrylamide, polyvinylamine, polyethylene oxide, fixatives or even of microparticles, such. Bentonite or silicate formed.
  • 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, they serve in
  • Pulp suspension or water before spraying into the main stream 6 to mix a chemical Pulp suspension or water before spraying into the main stream 6 to mix a chemical. This premixing is sometimes possible if there is no substantial pre-reaction of the chemical or deposits through it
  • 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 over the circumference of the channel.
  • the mixing arrangement shown in Figure 1 is very simple and is essentially formed by two nozzles 1 1, 12 which inject a first fluid 1 and a second fluid 2 transversely 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 1 1 for the first fluid 1 is 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 guided centrally through the nozzle opening 8 of the nozzle 1 1 of the first fluid 1 in the main stream 6.
  • 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. This is advantageous because because of the chemicals of the second fluid 2 reinforced with deposits in the
  • Entry area is to be expected in the main stream 6, however, by the
  • the first fluid 1 when injected into the main flow 6, the first fluid 1 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 outgoing from her nozzle jet is flowed around with the second fluid 2 of 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.
  • Figure 2 shows 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 the principle described for Figure 1 by a respective nozzle opening 8,15 out, which lies in the plane of the channel wall 5.
  • 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 with at least one chemical are common
  • 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.
  • a nozzle 13 extends further into the main stream 6 than the other nozzle 12, which provide additional turbulence and the
  • the mixing arrangement according to FIG. 4 mixes three fluids 1, 2, 3 perpendicular to
  • the fluids 1, 2, 3, 4 should be injected at a pressure in the latter 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.

Landscapes

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

Abstract

L'invention concerne un procédé et un dispositif destinés à ajouter et à mélanger plusieurs fluides (1,2), dont un fluide (2) au moins est composé au moins en partie d'un produit chimique, dans un flux principal (6) contenu dans une paroi de conduit (5). L'invention vise à créer un mélange le plus complet possible d'un produit chimique dans le flux principal (6). A cet effet, un premier fluide (1) est projeté dans le flux principal (6), au moins partiellement dans le sens d'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) est plus éloigné de la paroi de conduit (5) que point d'entrée du premier fluide (1) dans le flux principal (6).
PCT/EP2011/056123 2010-05-05 2011-04-18 Procédé et installation de mélange Ceased WO2011138162A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180033346.6A CN102971066B (zh) 2010-05-05 2011-04-18 混合方法和混合设备
EP11717982.0A EP2566611B1 (fr) 2010-05-05 2011-04-18 Procédé et installation de mélange

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028573A DE102010028573A1 (de) 2010-05-05 2010-05-05 Mischverfahren
DE102010028573.0 2010-05-05

Publications (1)

Publication Number Publication Date
WO2011138162A1 true WO2011138162A1 (fr) 2011-11-10

Family

ID=44259645

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/056123 Ceased WO2011138162A1 (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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170197189A1 (en) * 2010-09-28 2017-07-13 Dow Global Technologies Llc Reactive flow static mixer with cross-flow obstructions

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20125338A7 (fi) 2012-03-26 2013-09-27 Wetend Tech 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
WO2016015991A1 (fr) 2014-07-29 2016-02-04 Voith Patent Gmbh 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683266A1 (fr) * 1994-05-13 1995-11-22 Voith Sulzer Papiermaschinen GmbH Caisse de tête pour une machine à papier avec addition locale de fluide
WO2006005795A1 (fr) * 2004-07-15 2006-01-19 Wetend Technologies Oy Procede et appareil d'introduction de produits chimiques dans un flux liquide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683266A1 (fr) * 1994-05-13 1995-11-22 Voith Sulzer Papiermaschinen GmbH Caisse de tête pour une machine à papier avec addition locale de fluide
WO2006005795A1 (fr) * 2004-07-15 2006-01-19 Wetend Technologies Oy Procede et appareil d'introduction de produits chimiques dans un flux liquide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170197189A1 (en) * 2010-09-28 2017-07-13 Dow Global Technologies Llc Reactive flow static mixer with cross-flow obstructions
US9975094B2 (en) * 2010-09-28 2018-05-22 Dow Global Technologies Llc Reactive flow static mixer with cross-flow obstructions

Also Published As

Publication number Publication date
CN102971066B (zh) 2016-08-03
EP2566611B1 (fr) 2014-06-11
DE102010028573A1 (de) 2011-11-10
EP2566611A1 (fr) 2013-03-13
CN102971066A (zh) 2013-03-13

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