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WO2012052371A1 - Mélange de substances chimiques - Google Patents

Mélange de substances chimiques Download PDF

Info

Publication number
WO2012052371A1
WO2012052371A1 PCT/EP2011/068052 EP2011068052W WO2012052371A1 WO 2012052371 A1 WO2012052371 A1 WO 2012052371A1 EP 2011068052 W EP2011068052 W EP 2011068052W WO 2012052371 A1 WO2012052371 A1 WO 2012052371A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbulence
main stream
fluids
fluid
main
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/EP2011/068052
Other languages
German (de)
English (en)
Inventor
Susanne Berger
Thomas Jaschinski
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 WO2012052371A1 publication Critical patent/WO2012052371A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/27—Mixing by jetting components into a conduit for agitating its contents
    • 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
    • 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
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B01F25/31322—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices used simultaneously
    • 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
    • B01F25/31331—Perforated, multi-opening, with a plurality of holes
    • 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
    • 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

Definitions

  • the invention relates to a method for mixing one or more fluids, of which at least one fluid is at least partially formed by a chemical, in a wholly or partially bounded by a channel wall
  • the object of the invention is therefore to ensure the most comprehensive and gentle mixing of the chemicals in the main stream.
  • the object has been achieved in that the mixing of the fluids with the main flow through one, on the injection at least one
  • Turbulence fluids in the main flow generated turbulence zone of the main flow is supported.
  • the turbulence zone in the main stream provides a comprehensive turbulence of all fluids in this area without stressing the chemicals too much.
  • the fluids can be perpendicular or inclined to the channel wall and / or distributed over the cross section of the main flow in this injected.
  • the turbulence zone is preferably formed by means of at least one turbulence fluid, which is injected perpendicularly or inclined to the channel wall into the main stream.
  • the turbulence in the main flow can be further enhanced by the fact that several turbulence fluids meet in a turbulence zone of the main flow.
  • the turbulence zone can also be located in the main stream in the area of the injection of the fluids, it is in the interest of protecting the turbulence zone
  • Chemicals and intensive mixing advantageous if the injection of the turbulence fluid in the direction of flow of the main flow after the mixing of the fluids into the main flow. Additionally or alternatively, it is advantageous if at least one turbulence fluid is injected into the main flow cross section in the latter, wherein the
  • Flow velocity of the turbulence fluid is greater than that of the main flow. Due to the higher flow velocity of the turbulence fluid, turbulence with the main flow occurs in this case.
  • the turbulence fluid should be at least one lying in the direction of flow of the main stream
  • Flow component are injected into the main stream.
  • the turbulence fluid acts only at a distance from its injection, the injection of the turbulence fluid in the flow direction of the main flow should take place before the mixing of the fluids into the main flow.
  • the main stream of a pulp suspension for producing a paper, cardboard, tissue or other fibrous web or from process, fresh water or similar. is formed.
  • the turbulence fluid is preferably from a pulp suspension, process, fresh water or similar. educated. If the turbulence fluid has a lower consistency than the main stream, then it can be used specifically for dilution and thus additionally support the mixing with the chemicals. As a result, the improved mixing significantly reduces the consumption of process and functional chemicals.
  • FIG. 1 shows a schematic longitudinal section through the main flow
  • Figure 2 a longitudinal section through another main stream 1 and
  • Figure 3 + 4 a transverse and a longitudinal section through another main stream 1.
  • the arrangements shown here are used for admixing a plurality of fluids 2,3 to a main fluid stream 1 of a pulp suspension, which in a tubular channel to a headbox of a machine Production of a fibrous web, in particular a paper web is performed and has a consistency between 0.2 and 2.5%.
  • the pulp suspension consists essentially of pulp and / or
  • Waste paper fibers, water and fillers are Waste paper fibers, water and fillers.
  • the invention is also applicable to upwardly open channels in which the main flow is only partially bounded by a channel wall and accordingly forms a free surface, in particular in white water channels of
  • the fluids 2, 3 to be admixed 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.
  • the chemicals may also be starch Biocide, a dye, a brightener, a sizing agent or similar act. In order to avoid a thermal shock of these chemicals during their injection, it is usually advantageous to match their temperature to the temperature of the main stream 1, ie to heat usually.
  • Turbulence zone 7 ensure a gentle, but intensive mixing.
  • the turbulence fluid 4 of the pulp suspension itself, fresh water or process water, such as white water of the paper machine, a filtrate
  • the turbulence fluid 4 has a lower solids content than the main stream 1, then it can be used specifically for influencing the consistency in the turbulence zone 7, so that the optimum consistency range in the turbulence zone
  • Turbulence zone 7 for the interference of the fluids 2,3 results.
  • All these injections can be made perpendicular to the main stream 1 or inclined in or against the flow direction 6.
  • the following turbulence zone 7 is from formed a plurality of perpendicular to the main flow 1 aligned turbulence fluid streams.
  • the nozzles for supplying the turbulence fluids 4 are arranged distributed regularly over the circumference of the main flow 1 in the channel wall 5, so that the turbulence fluid flows in the main flow 1 intersect.
  • the fluids 2, 3 with the chemicals are likewise injected onto the same circumferential line of the main flow 1 but perpendicularly into the main flow 1. If the fluid jets meet in the main stream 1, this already leads to a
  • a turbulence zone 7 is generated by a turbulence fluid 4, which is injected concentrically in the flow direction 6 of the main flow 1 before the addition of fluid and in the flow direction 6 of the main flow 1 in this.
  • the turbulence fluid 4 has a significantly higher flow velocity than the main flow 1 when it enters the main flow 1.
  • a turbulence zone 7 that reaches up to the injection of the fluids 2, 3 forms.
  • the nozzle openings 8 can, as shown, in the flow direction 6 of the main flow 1 but also be aligned against it.
  • turbulence zone 7 is uniformly distributed by four over a circumferential line of the tubular duct wall 5 of the main flow 1 Nozzles for supplying turbulence fluid streams formed. This is the
  • the distribution of the chemicals in the main stream 1 can be improved by the turbulence zone 7, which increases the effectiveness of the chemicals and thus reduces their demand.
  • the flow rate of the fluids 2, 3 and of the turbulence fluids 4 should be so high that there are no or only slight deposits on the channel wall 5 or the corresponding nozzles. Flow velocities between 0.05 and 20 m / s are usually sufficient for this purpose.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

L'invention concerne un procédé permettant de mélanger un ou plusieurs fluides (2, 3), dont au moins un fluide (2, 3) est au moins partiellement constitué d'une substance chimique, dans un flux principal (1) délimité par une paroi de canal (5). L'objectif de l'invention est d'obtenir un mélange aussi parfait et complet que possible avec la substance chimique. A cet effet, le mélange du fluide (2, 3) avec le flux principal (1) est assisté par une zone de turbulence (7) du flux principal (1) produite dans le flux principal (1) par l'injection d'au moins un fluide de turbulence (4).
PCT/EP2011/068052 2010-10-19 2011-10-17 Mélange de substances chimiques Ceased WO2012052371A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010042608.3 2010-10-19
DE102010042608A DE102010042608A1 (de) 2010-10-19 2010-10-19 Chemikalieneinmischung

Publications (1)

Publication Number Publication Date
WO2012052371A1 true WO2012052371A1 (fr) 2012-04-26

Family

ID=44883217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/068052 Ceased WO2012052371A1 (fr) 2010-10-19 2011-10-17 Mélange de substances chimiques

Country Status (2)

Country Link
DE (1) DE102010042608A1 (fr)
WO (1) WO2012052371A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715719A (zh) * 2017-09-11 2018-02-23 天津科技大学 一种可实现射流泵系统尾管二次射流加料的喷嘴

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120936477A (zh) * 2023-04-06 2025-11-11 陶氏环球技术有限责任公司 用于混合流体熔体流动流的方法
KR20250174637A (ko) * 2023-04-06 2025-12-12 다우 글로벌 테크놀로지스 엘엘씨 유체 용융 유동 스트림을 혼합하기 위한 공정

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471841A (en) * 1974-01-31 1977-04-27 Ruhrkohle Ag Device for mixing pneumatically conveyed material with a fluid
EP1203888A1 (fr) * 1997-03-24 2002-05-08 Naukovo-virobnicha firma TECHMASH, Ltd. Dispositif pour influencer l'ecoulement d'un fluide
WO2004007062A2 (fr) * 2002-07-11 2004-01-22 1 1 Prototyping Herbak Gmbh Dispositif pour melanger des liquides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471841A (en) * 1974-01-31 1977-04-27 Ruhrkohle Ag Device for mixing pneumatically conveyed material with a fluid
EP1203888A1 (fr) * 1997-03-24 2002-05-08 Naukovo-virobnicha firma TECHMASH, Ltd. Dispositif pour influencer l'ecoulement d'un fluide
WO2004007062A2 (fr) * 2002-07-11 2004-01-22 1 1 Prototyping Herbak Gmbh Dispositif pour melanger des liquides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715719A (zh) * 2017-09-11 2018-02-23 天津科技大学 一种可实现射流泵系统尾管二次射流加料的喷嘴

Also Published As

Publication number Publication date
DE102010042608A1 (de) 2012-04-19

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