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WO1999000180A1 - Melangeur statique a elements multiples et procede de fonctionnement - Google Patents

Melangeur statique a elements multiples et procede de fonctionnement Download PDF

Info

Publication number
WO1999000180A1
WO1999000180A1 PCT/US1998/011901 US9811901W WO9900180A1 WO 1999000180 A1 WO1999000180 A1 WO 1999000180A1 US 9811901 W US9811901 W US 9811901W WO 9900180 A1 WO9900180 A1 WO 9900180A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
static mixer
conduit
low shear
high shear
Prior art date
Application number
PCT/US1998/011901
Other languages
English (en)
Inventor
Mark F. Reeder
Original Assignee
Robbins & Myers, Inc.
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 Robbins & Myers, Inc. filed Critical Robbins & Myers, Inc.
Publication of WO1999000180A1 publication Critical patent/WO1999000180A1/fr

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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • B01F25/43151—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material composed of consecutive sections of deformed flat pieces of material

Definitions

  • the present invention relates to devices and methods for mixing fluids and, more particularly, to static mixers for use in conduits conveying fluids.
  • Static mixers are effective for mixing fluid streams in a conduit and often are preferable over turbines or other kinetic mixing devices in areas of cost, operation and maintenance, and ease of installation.
  • Static mixers typically comprise a plurality of baffle-type elements arranged within a conduit. The fluid stream to be mixed is conveyed through the mixers, where it impinges upon the baffle-type element which directs the fluid streams in different directions, creating shear forces and/or turbulence, thereby stretching and reordering the fluid elements.
  • Typical single component mixer designs are comprised of a single component which is repeated.
  • component herein means a single static mixing element of a defined shape.
  • single component static mixers have shortcomings that may appear under certain mixing conditions. For example, single component mixers may not provide efficient mixing when mixing relatively high and low viscosity fluids together. Furthermore, when an off-center or asymmetric injection is utilized, single component mixers may not disperse the injected matter effectively.
  • the present invention is a multi-component static mixer which is specially adapted to mix fluids (which may consist of liquids, a liquid and a gas, gases, and particulates suspended in a liquid), especially fluids comprised of high and low viscosity fluid streams, or a fluid stream which is asymmetrically injected into an associated conduit.
  • fluids which may consist of liquids, a liquid and a gas, gases, and particulates suspended in a liquid
  • fluids comprised of high and low viscosity fluid streams, or a fluid stream which is asymmetrically injected into an associated conduit.
  • multi-component herein means a mixer comprised of static mixing components of substantially differing shapes.
  • the multi-component static mixer of the present invention subjects a fluid element to a varying shear field as it travels through the mixer. It is known that varying the shear field enhances mixing.
  • the invention is an apparatus and method in which an upstream component, shaped to effect a predominantly high shear mixing of the fluid in the conduit, and a downstream component, shaped to effect a predominantly low shear mixing of the fluid relative to the upstream component, are combined and cooperate to provide mixing which is superior to either high or low shear static mixers.
  • the upstream component includes a plurality of generally radially extending blades, each of which is inclined in an axial direction and tapers in width from an outer periphery of the component toward the center of the conduit.
  • the blades alternate in inclination, so that fluid volumes impinging upon adjacent blades are directed alternately radially inwardly and outwardly, thereby creating relatively high shear forces between fluid volumes flowing in alternate radial directions, which effects mixing.
  • the upstream component includes a plurality of spaced, parallel blades inclined to the axis of the conduit and interspersed with a second plurality of spaced, parallel blades inclined to the axis of the conduit in an opposite direction. Again high shear forces are imparted to fluid volumes when the fluid volumes impinge upon the blades and adjacent fluid volumes are directed in opposite directions.
  • the downstream component includes one or more strips of flat sheet material twisted to extend axially in a helical shape.
  • the multi-component static mixer includes a plurality of such helical components, arranged so that alternating components twist in alternate directions (i.e., clockwise followed by counterclockwise helical twists). Fluid volumes impinging upon the helical strips of the downstream component are distributed by the strips evenly across the conduit. As a result, the combination of the two components effects greater breakup of fluids, which causes subsequent homogenization of the fluid particles across the conduit.
  • the upstream and downstream components preferably are arranged in abutting relation, or are spaced from each other no greater than two conduit diameters.
  • FIG. 1 is a side elevation of a preferred embodiment of the multi- component static mixer of the present invention shown mounted in a conduit, the conduit being shown in section;
  • Fig. 2 is a side elevation of an alternate embodiment of the multi- component static mixer of the present invention shown mounted in a conduit, the conduit being shown in section;
  • Fig. 3 is a detail side elevation of the static mixer of Fig. 1 ;
  • Fig. 4 is a detail side elevation of the static mixer of Fig.2;
  • Fig. 5 is a perspective view of a preferred embodiment of a high shear component of the static mixer of Fig. 1 ;
  • Fig.6 is a perspective view of an alternate embodiment of a high shear component of the static mixer of Fig. 2;
  • Fig. 7 is a perspective view of a preferred embodiment of a low shear component of the static mixer of the present invention.
  • Fig. 8 is an exploded, perspective view of the component of Fig. 5;
  • Fig. 9 is a top plan view of the mixer component of Fig.5 in which an associated conduit is shown in phantom.
  • multi-component static mixers of the present invention are shaped to be mounted within a conduit 12.
  • the mixer 10 includes a high shear static mixing component, generally designated 14.
  • the high shear component 14 includes a plurality of generally radially-extending, flat, blade-shaped spokes 15, 16.
  • the spokes 15, 16 are not twisted or skewed relative to a radial plane of an associated conduit 12, but are inclined in an axial direction with respect to the conduit and taper in width from the outer periphery of the component 14 toward its center.
  • Spokes 15 are inclined in a radially-outwardly extending, upstream direction within conduit 12, and spokes 16 are inclined in a radially-outwardly extending, downstream direction.
  • the downstream direction is indicated by the arrows B in Figs. 1 , and 2.
  • component 14 is made up of elements 20, 24, each consisting of an array of similarly-inclined spokes 15, 16, respectively, joined at their radial centers.
  • Element 24 consists of downstream-inclined spokes 16, while element 20 consists of upstream-inclined spokes 15.
  • the optimal range for the angle of inclination of the spokes 15, 16 is between approximately 20° and approximately 50° from a radial plane A (see Fig. 1 ), preferably between 38° and Mixing elements 20, 24 are identical to each other in configuration, but are arranged to face in axially opposite directions in conduit 12.
  • the elements 20, 24 are arranged in a nested relation to each other (see Fig. 1 ) to form each component
  • each mixing component 14 is formed having alternate spokes 15, 16 inclined in upstream and downstream directions.
  • the use of identical elements 20, 24 reduces manufacturing costs since only a single element need be manufactured and inventoried.
  • each element 20, 24 has four spokes 15, 16.
  • an alternate high shear mixing-component 30 is utilized as shown in Figs. 2, 4, and 6.
  • the alternate high shear mixing component 30 includes a lattice of intersecting fingers 32.
  • a plurality of parallel, evenly spaced-fingers 32 form a substantially planar panel 34.
  • Three spaced, substantially parallel panels 34 together comprise a first set of panels 36.
  • a second set of panels 38 includes three spaced, substantially parallel panels 34'.
  • the first and second sets of panels 36, 38 are arranged such that each panel 34 within the first set of panels 36 forms an angle with each panel 34' from the second set of panels 38 to form the mixing component 30. In this manner, each finger 32 forms an angle with a plurality of other fingers.
  • Fluid flowing through a conduit containing mixing element 30 is redirected and reordered by the fingers 32.
  • High shear forces are imparted to fluid volumes when the fluid volumes impinge upon the blades and adjacent fluid volumes are directed in opposite directions.
  • Each finger 32 has an outer surface contoured to fit within the conduit.
  • the relatively low shear component preferably used with the present invention 10, 10' is shown in Figs. 1 , 2, and 7.
  • the low shear component includes a flat sheet of material bent to form a helix 50.
  • the helix 50 has opposed ends 56, 58.
  • the ends 56, 58 of the flat sheet (not shown) are rotated relative to each other about the longitudinal axis approximately 180° to form the mixing component 50.
  • Each high shear component 14, 30 preferably has a K factor of between approximately 20 and 200.
  • Each low shear component 50 preferably has a K factor of between approximately 2 and 10.
  • the K factor is a dimensionless number which represents the pressure drop of a fluid flowing through a conduit containing a given mixing element, relative to the pressure drop for the same fluid flowing through the same conduit without any mixing components. It is to be understood that the preferred values discussed herein for K factors of the mixing components of the present invention are intended to represent K factors given laminar flow with a Reynolds number of less than 10.
  • the high shear components 14, 30 are positioned upstream of the associated low shear components 50.
  • Two segments 60, 62 of the multi-component static mixers 10, 10' are shown in Figs. 3 and 4.
  • the mixing components 14, 50, 30, 50, respectively are shown in abutting relation, it is to be understood that a gap may exist between adjacent mixing components of up to two conduit diameters.
  • the upstream, high shear component 14 breaks the fluid into droplets relatively more effectively than does the downstream component 50.
  • the downstream component 50 then distributes the droplets across the conduit cross-section more effectively than does the upstream component 14.
  • the term "droplet” as used herein means a relatively small fluid element.
  • this alternating pattern of high shear and low shear mixing components may be repeated throughout the conduit to effect more complete mixing.
  • each in the mixers 10, 10', each includes a plurality of high shear components 14, 30 arranged upstream of a single low shear mixing component 50.
  • six high shear components 14, 30 are located upstream of a single low-shear element 50.
  • the upstream low shear component 50 rotates the fluid in a first tangential direction, and the downstream low shear component 50' guides the fluid in the opposite tangential direction.

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

Abstract

L'invention concerne un mélangeur statique à éléments multiples (10) comprenant un élément amont (14 ou 30) dont la forme induit un mélange à cisaillement relativement élevé du fluide dans le conduit (12), et un élément aval (50) dont la forme induit un mélange à cisaillement principalement faible du fluide par rapport à celui de l'élément amont (14 ou 30) dans le conduit (12). De préférence, l'élément aval (50) est placé dans le conduit au maximum à l'équivalent de deux diamètres de conduit en aval de l'élément amont (14 ou 30), moyennant quoi l'élément amont réduit le fluide en goutelettes avec relativement plus d'efficacité que l'élément aval (50), et l'élément amont (14 ou 30) distribue les goutelettes dans la section transversale du conduit avec relativement plus d'efficacité que l'élément amont (14 ou 30).
PCT/US1998/011901 1997-06-26 1998-06-09 Melangeur statique a elements multiples et procede de fonctionnement WO1999000180A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88323897A 1997-06-26 1997-06-26
US08/883,238 1997-06-26

Publications (1)

Publication Number Publication Date
WO1999000180A1 true WO1999000180A1 (fr) 1999-01-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/011901 WO1999000180A1 (fr) 1997-06-26 1998-06-09 Melangeur statique a elements multiples et procede de fonctionnement

Country Status (1)

Country Link
WO (1) WO1999000180A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002009858A3 (fr) * 2000-08-02 2002-04-11 Chemineer Element melangeur statique et procede de melange de deux fluides
US6595679B2 (en) * 2000-02-08 2003-07-22 Bayer Aktiengesellschaft Static mixer with at least three interleaved grids
EP1426099A1 (fr) * 2002-12-06 2004-06-09 Mixpac Systems AG Mélangeur statique
EP1510247A1 (fr) * 2003-08-26 2005-03-02 Sulzer Chemtech AG Mélangeur statique avec une structure polymorphe
US7137731B2 (en) * 2004-03-31 2006-11-21 Komax Systems, Inc. Replaceable mixing elements for motionless mixer
EP1754530A1 (fr) * 2005-08-18 2007-02-21 StaMixCo Technology AG Elément mélangeur pour l'inversion et le mélange de matières en écoulement dans un canal d'écoulement, ensemble et mélangeur comprenant de tels éléments mélangeurs, et procédé pour mélanger une matière en écoulement dans un canal d'écoulement
US7434794B2 (en) 2003-05-16 2008-10-14 Florian Kehrer Mass transfer method using static packings
DE112004001604B4 (de) * 2003-09-05 2009-09-03 Zhaoyan Liu Dreidimensionale quer angeordnete Umlenkeinrichtung als inneres Element in einem Rohr, einem Fass oder einem Turm
WO2011025725A1 (fr) 2009-08-31 2011-03-03 Dow Global Technologies Inc. Dispositif de mélange de procédé de mélange dynamique
GB2484694A (en) * 2010-10-20 2012-04-25 Chemfix Products Ltd Mixing extruded materials
WO2013066709A1 (fr) * 2011-10-31 2013-05-10 Nordson Corporation Déflecteur mélangeur reconfigurable pour mélangeur statique et procédé de fabrication d'un mélangeur statique
WO2014083228A1 (fr) * 2012-11-28 2014-06-05 Mozo-Grau, S.L. Distracteur alvéolaire
CN102084103B (zh) * 2008-06-26 2014-06-11 坦尼科汽车营业公司 排放气体添加剂/处理系统以及用于其中的混合器
CN107626199A (zh) * 2017-09-29 2018-01-26 史汉祥 一种烟气净化反应器及烟气净化系统
CN111001324A (zh) * 2019-11-15 2020-04-14 中核新科（天津） 精密机械制造有限公司 用于高粘度液相物料的静态混料器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861652A (en) * 1972-11-15 1975-01-21 Du Pont Mixing device
GB2086249A (en) * 1980-10-13 1982-05-12 Toyo Engineering Corp Mixing apparatus
WO1992014541A1 (fr) * 1991-02-20 1992-09-03 Dena Technology Appareil de melange et d'homogeneisation
US5312185A (en) * 1989-12-28 1994-05-17 Hisao Kojima Motionless mixer and method for manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861652A (en) * 1972-11-15 1975-01-21 Du Pont Mixing device
GB2086249A (en) * 1980-10-13 1982-05-12 Toyo Engineering Corp Mixing apparatus
US5312185A (en) * 1989-12-28 1994-05-17 Hisao Kojima Motionless mixer and method for manufacturing the same
WO1992014541A1 (fr) * 1991-02-20 1992-09-03 Dena Technology Appareil de melange et d'homogeneisation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOVAK V., JANDOUREK V., RIEGER F.: "HOMOGENIZATION EFFICIENCY OF MOTIONLESS MIXERS.", EUROPEAN CONFERENCE ON MIXING, XX, XX, 10 June 1985 (1985-06-10), XX, pages 571 - 579., XP002914364 *

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6595679B2 (en) * 2000-02-08 2003-07-22 Bayer Aktiengesellschaft Static mixer with at least three interleaved grids
WO2002009858A3 (fr) * 2000-08-02 2002-04-11 Chemineer Element melangeur statique et procede de melange de deux fluides
KR101010872B1 (ko) * 2002-12-06 2011-01-26 술저 믹스팩 아게 스태틱 믹서
WO2004052519A1 (fr) * 2002-12-06 2004-06-24 Mixpac Systems Ag Melangeur statique
US7841765B2 (en) 2002-12-06 2010-11-30 Sulzer Mixpac Ag Static mixer
EP1426099A1 (fr) * 2002-12-06 2004-06-09 Mixpac Systems AG Mélangeur statique
US7325970B2 (en) * 2002-12-06 2008-02-05 Sulzer Mixpac Ag Static mixer
US7434794B2 (en) 2003-05-16 2008-10-14 Florian Kehrer Mass transfer method using static packings
EP1510247A1 (fr) * 2003-08-26 2005-03-02 Sulzer Chemtech AG Mélangeur statique avec une structure polymorphe
US7438464B2 (en) * 2003-08-26 2008-10-21 Sulzar Chemtech Ag Static mixer with polymorphic structure
DE112004001604B4 (de) * 2003-09-05 2009-09-03 Zhaoyan Liu Dreidimensionale quer angeordnete Umlenkeinrichtung als inneres Element in einem Rohr, einem Fass oder einem Turm
US7753080B2 (en) 2003-09-05 2010-07-13 Zhaoyan Liu Three-dimensionally intersecting diverter as an inner member for a pipe, barrel or tower
US7137731B2 (en) * 2004-03-31 2006-11-21 Komax Systems, Inc. Replaceable mixing elements for motionless mixer
WO2007020149A3 (fr) * 2005-08-18 2007-05-18 Stamixco Technology Ag Element melangeur, jeu de pieces comprenant des elements melangeurs et malaxeur
EP1754530A1 (fr) * 2005-08-18 2007-02-21 StaMixCo Technology AG Elément mélangeur pour l'inversion et le mélange de matières en écoulement dans un canal d'écoulement, ensemble et mélangeur comprenant de tels éléments mélangeurs, et procédé pour mélanger une matière en écoulement dans un canal d'écoulement
CN102084103B (zh) * 2008-06-26 2014-06-11 坦尼科汽车营业公司 排放气体添加剂/处理系统以及用于其中的混合器
WO2011025725A1 (fr) 2009-08-31 2011-03-03 Dow Global Technologies Inc. Dispositif de mélange de procédé de mélange dynamique
US7946753B2 (en) 2009-08-31 2011-05-24 Dow Global Technologies Llc Rotatable mixing device and dynamic mixing method
GB2484694A (en) * 2010-10-20 2012-04-25 Chemfix Products Ltd Mixing extruded materials
GB2484694B (en) * 2010-10-20 2012-11-14 Chemfix Products Ltd Mixing extruded materials
US9981232B2 (en) 2011-10-31 2018-05-29 Nordson Corporation Reconfigurable mixing baffle for static mixer and method for making a static mixer
JP2014532556A (ja) * 2011-10-31 2014-12-08 ノードソン コーポレーションＮｏｒｄｓｏｎ Ｃｏｒｐｏｒａｔｉｏｎ スタティックミキサーの再構成可能な混合バッフル、及びスタティックミキサーを作製する方法
US9242214B2 (en) 2011-10-31 2016-01-26 Nordson Corporation Reconfigurable mixing baffle for static mixer and method for making a static mixer
WO2013066709A1 (fr) * 2011-10-31 2013-05-10 Nordson Corporation Déflecteur mélangeur reconfigurable pour mélangeur statique et procédé de fabrication d'un mélangeur statique
US11446616B2 (en) 2011-10-31 2022-09-20 Nordson Corporation Reconfigurable mixing baffle for static mixer and method for making a static mixer
WO2014083228A1 (fr) * 2012-11-28 2014-06-05 Mozo-Grau, S.L. Distracteur alvéolaire
ES2472315A1 (es) * 2012-11-28 2014-06-30 Mozo-Grau, S.L. Distractor alveolar
CN107626199A (zh) * 2017-09-29 2018-01-26 史汉祥 一种烟气净化反应器及烟气净化系统
CN111001324A (zh) * 2019-11-15 2020-04-14 中核新科（天津） 精密机械制造有限公司 用于高粘度液相物料的静态混料器
CN111001324B (zh) * 2019-11-15 2023-11-24 中核新科（天津）精密机械制造有限公司 用于高粘度液相物料的静态混料器

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