EP1001841A1 - Rampe de buses melangeuses cruciforme - Google Patents

Rampe de buses melangeuses cruciforme

Info

Publication number
EP1001841A1
EP1001841A1 EP98943781A EP98943781A EP1001841A1 EP 1001841 A1 EP1001841 A1 EP 1001841A1 EP 98943781 A EP98943781 A EP 98943781A EP 98943781 A EP98943781 A EP 98943781A EP 1001841 A1 EP1001841 A1 EP 1001841A1
Authority
EP
European Patent Office
Prior art keywords
medium
cross
flow
line
behind
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.)
Withdrawn
Application number
EP98943781A
Other languages
German (de)
English (en)
Inventor
Götz LAUSCHKE
Wilfried Schierholz
Stefan Ott
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.)
Siemens Axiva GmbH and Co KG
Original Assignee
Axiva 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 Axiva GmbH filed Critical Axiva GmbH
Publication of EP1001841A1 publication Critical patent/EP1001841A1/fr
Withdrawn legal-status Critical Current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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements

Definitions

  • the invention relates to a device for metering and mixing flowable media, comprising a line through which a first medium can flow, and at least two means for admixing a second medium into the first medium, which are arranged in the line and have a tubular design.
  • Devices of this type are known to the person skilled in the art from the prior art, for example as a nozzle with a swirl chamber, as a static mixer or as a mixing system with movable internals.
  • a nozzle with a swirl chamber for example as a static mixer or as a mixing system with movable internals.
  • some of the devices mentioned at the outset are used to make streamlines visible by coloring.
  • first-mentioned devices partly have the disadvantage of a high pressure loss, partly they tend to become soiled due to large surfaces, partly they involve high construction and assembly costs and partly they require an additional drive and additional seals.
  • the second group serves for dosing, but not for rapid mixing, as is required for applications in chemical process engineering, for example.
  • the invention was therefore based on the object of providing a device mentioned at the outset with improved properties with regard to quick and effective metering and mixing, which is also still easy to manufacture and maintain.
  • a device for metering and mixing flowable media comprising a line through which a first medium can flow, and at least two means for admixing a second medium into the first medium, which are arranged in the line and have a tubular design, characterized in that the at least two means each have one or more openings through which the second medium can be mixed into the first medium, and are arranged in a cross shape with respect to one another and one behind the other in the direction of flow.
  • the inner diameter of the line is referred to below as Dj, the outer diameter of the means as D a . Special configurations result from the subclaims.
  • a first embodiment is characterized in that the tubular means have at least 4 openings with the same or different diameters.
  • the outer diameters D a can also be the same or different.
  • the cross-shaped arrangement is advantageously chosen so that the free cross-sectional area of the line is a minimum.
  • An angular, preferably square, cross-sectional area is particularly favorable, as are the distances between the means from one another of at most 10 * D a , preferably at most 5 * D a ., Particularly preferably at most 2 * D a and very particularly preferably of at most 1 * D a . of the agent arranged at the front.
  • Favorable ratios of D a to Dj are in the range from 0.1 to 0.33.
  • the device according to the invention is also referred to below as a crossbar mixing nozzle (KMD).
  • the advantages of the KMD are due to its simple and compact design: low manufacturing and assembly costs, strong swirling of the flow directly at the point of addition of the second medium and therefore short mixing lengths with a small outer surface, no moving parts.
  • 1 shows a KMD in a broken, perspective side view
  • 2 shows a cross section through the KMD perpendicular to the flow direction
  • 3 shows a cross section through the KMD parallel to the direction of flow
  • Fig. 4 calculated flow conditions on a KMD.
  • a KMD 1 essentially consists of a line 2 for a first medium, usually a tube with an inner diameter 9 (Dj), into which several - in Fig. 2 four - tubular means 3 - hereinafter called crossbar 3 - for admixing a second Medium are installed.
  • the means have a square cross section and are arranged in the flow direction 4 one behind the other and in a cross shape.
  • the distance 5 between two crossbars 3 is less than whose outer diameter 6 (D a )., the diagonal of the cross section.
  • the crossbars are offset from one another so that the free cross-sectional area of the line 2 is minimal.
  • the order of the arrangement can be chosen arbitrarily.
  • the second medium is added via feed lines 7 and openings (bores or holes) 8.
  • the openings 8 are preferably located radially in the middle between the outer wall of the tube 2 and the outer edge of one of the other crossbars 3 (FIG. 2). They are preferably attached to the downstream side of the crossbar 3.
  • FIG. 4 shows calculated flow conditions on a KMD 1 with two square crossbeams 3.
  • the crossbars 3 disturb the flow in two axes and ensure an intensive swirling directly behind them.
  • the metering of the second medium takes place at the location of strong turbulence. This creates a quick and low-pressure mixing.
  • the dimensions are matched to the flow in such a way that the vortex road that arises behind the crossbeam oscillates unsteadily. Such preferred dimensions can be determined using such calculated flow conditions. The person skilled in the art is familiar with the numerical methods for this.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

L'invention concerne un dispositif permettant de doser et de mélanger des substances coulantes, qui comporte une conduite (2) de diamètre intérieur Di (9), à travers laquelle peut passer une première substance, ainsi qu'au moins deux éléments (3) tubulaires, pour ajouter une seconde substance à la première, qui sont placés dans la conduite (2) et présentent un diamètre extérieur Da (6). Ce dispositif se caractérise en ce que les éléments (3) (au moins au nombre de deux) présentent chacun une ou plusieurs ouvertures (8) à travers lesquelles la seconde substance peut être introduite pour être mélangée à la première substance. Les éléments (3) (au moins au nombre de deux) comportent une section transversale polygonale et sont disposés en croix les uns par rapport aux autres et à la suite les uns des autres dans le sens d'écoulement, à une distance (5) maximale de 10*Da.
EP98943781A 1997-08-06 1998-07-24 Rampe de buses melangeuses cruciforme Withdrawn EP1001841A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19733973A DE19733973C2 (de) 1997-08-06 1997-08-06 Vorrichtung zur Dosierung und zur Vermischung fließfähiger Medien
DE19733973 1997-08-06
PCT/EP1998/004656 WO1999007461A1 (fr) 1997-08-06 1998-07-24 Rampe de buses melangeuses cruciforme

Publications (1)

Publication Number Publication Date
EP1001841A1 true EP1001841A1 (fr) 2000-05-24

Family

ID=7838123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98943781A Withdrawn EP1001841A1 (fr) 1997-08-06 1998-07-24 Rampe de buses melangeuses cruciforme

Country Status (4)

Country Link
EP (1) EP1001841A1 (fr)
BR (1) BR9811841A (fr)
DE (1) DE19733973C2 (fr)
WO (1) WO1999007461A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319435A3 (fr) * 2001-12-12 2004-10-06 Collectplan GmbH Procédé et appareil pour introduire un premier milieu dans un second milieu

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406470A1 (fr) * 1977-10-18 1979-05-18 Utilisation Ration Gaz Dispositif de melange de deux fluides et vanne a opercule equipee d'un tel dispositif
JPS54127064A (en) * 1978-03-06 1979-10-02 Komax Systems Inc Charging instrument of stationary mixer
DE4421352C2 (de) * 1994-06-17 1997-03-20 Specker Helmut Verfahren und Vorrichtung zum Verdünnen eines Flüssigkonzentrats mit Wasser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9907461A1 *

Also Published As

Publication number Publication date
BR9811841A (pt) 2000-08-15
DE19733973A1 (de) 1999-04-29
DE19733973C2 (de) 2000-08-24
WO1999007461A1 (fr) 1999-02-18

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Legal Events

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Owner name: SIEMENS AXIVA GMBH & CO. KG

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Withdrawal date: 20010324