EP1493485A1 - Mélangeur statique - Google Patents

Mélangeur statique Download PDF

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Publication number
EP1493485A1
EP1493485A1 EP04405218A EP04405218A EP1493485A1 EP 1493485 A1 EP1493485 A1 EP 1493485A1 EP 04405218 A EP04405218 A EP 04405218A EP 04405218 A EP04405218 A EP 04405218A EP 1493485 A1 EP1493485 A1 EP 1493485A1
Authority
EP
European Patent Office
Prior art keywords
flow
obstacles
order
mixing
static mixer
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.)
Granted
Application number
EP04405218A
Other languages
German (de)
English (en)
Other versions
EP1493485B1 (fr
Inventor
Peter Mathys
Robert Schaetti
Zdravko Mandic
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.)
Sulzer Chemtech AG
Original Assignee
Sulzer Chemtech AG
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 Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Priority to EP04405218A priority Critical patent/EP1493485B1/fr
Publication of EP1493485A1 publication Critical patent/EP1493485A1/fr
Application granted granted Critical
Publication of EP1493485B1 publication Critical patent/EP1493485B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • 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
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • 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
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4322—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa essentially composed of stacks of sheets, e.g. corrugated sheets

Definitions

  • the invention relates to a static mixer according to the preamble of Claim 1 and a method for mixing with the inventive static mixer.
  • Installation length length in one
  • Piping which must be provided for the internals
  • mixing distance distance from the dosing point of a Additivs to the point in the pipeline, where the required mixing quality is reached.
  • a mixture of a static mixer is a measure of understood homogenization, referring to the radial Concentration distribution refers: the smaller inhomogeneities of these radial Distribution, the better the mixing quality.
  • concentration gradients given inhomogeneities can same size as the inhomogeneities regarding the radial concentration distributions. This could be done with a measuring method be determined, in which the mixing quality with a high frequency (20 Measurements per second) was detected.
  • axial inhomogeneities or temporal variations of be of considerable importance: For example, in a fast chemical Reaction between the components to be mixed, or at a Control of the flow rate of an additive with respect to the pipe measured concentrations.
  • the object of the invention is to provide a static mixer, the at Use of a single mixing element or a minimum number of Structural elements of the internals the disadvantages in terms of axial Inhomogeneities does not have and so - despite low installation costs - a ensures high quality of the mixture. This task is done by the im Claim 1 defined static mixer solved.
  • the static mixer for a low-viscosity fluid contains mixed effective Built-in in a pipe or a fluid conducting container are arranged.
  • the geometry of the internals is largely that of one Basic structure.
  • the internals comprise structural elements in the form of flat, folded or curved sheet-like flow obstacles as well as intermediate bottlenecks.
  • By internals in the form of The basic structure is a flow of the first order achievable, which in downstream mixing areas the pipe contents globally mixing flow is. Leave the structural elements of the basic structure describe themselves as segments, webs, plates and / or wings.
  • the Structural elements - hereinafter referred to as "primary flow obstacles" - are geometrically modified on surfaces and / or on edges.
  • a mixer 1 according to the invention which has a special configuration, is partially shown in FIG. 1.
  • This static mixer 1, with a low viscosity fluid 20 is homogenizable consists of a section a pipe 3 and mixing internals 10, which are arranged in the tube 3 are. Only one annular part 30 of the tube 3 is shown. This part 30 is mounted on a flange transition of the pipe 3, not shown.
  • the Mixable internals 10 of this embodiment can also in a pipe 3 may be arranged at a location that does not serve as a flange transition is trained.
  • the geometry of the internals 10 is largely that of a basic structure, the Structural elements 11, 11 'and 12 in the form of segment or wing-like Has flow obstacles. Through between the structural elements lying bottlenecks flows the fluid 20, the flow through arrows 21st is indicated.
  • the structural elements of the basic structure, posing as Segments, webs, plates and / or wings can be described hereinafter referred to as "primary flow obstacles”.
  • This primary Flow obstacles 11, 11 'and 12 are geometric at the edges modified, namely by secondary flow obstacles 11a, 11a 'and 12a, which are lamellar in the embodiment of FIG.
  • the secondary flow obstacles 11 a, 11 a 'and 12 a increase the Pressure loss.
  • the pressure loss increase is smaller, however, than if instead additional primary flow obstacles according to the obstacles 11, 11 'and 12 - ie additional mixing elements - would be used. Such would be necessary if the secondary flow obstacles 11 a, 11 a ' and 12a would be waived.
  • the primary Flow obstacles 11, 11 ', 12 are therefore on surfaces and / or on Rims through the secondary flow obstacles 11 a, 11 a and 12 a geometrically modified so that by these modifications local Second order flows are inducible, which are the first flow Overlay order and thus improve the quality of mixing.
  • the mixing quality improves in that radial and axial inhomogeneities in the fluid better than being balanced by the flow of first order, without that at the same time an increase of the pressure drop by more than 100% results.
  • the secondary flow obstacles 11 a, 11 a and 12 a are on Edge portions of the primary flow obstacles 11, 11 'and 12 are arranged. They thus form modifications of the primary flow obstacles 11, 11 ' as well as 12 and locally intensify the turbulence and / or induce Backflows of the fluid 20, whereby the mixing is improved.
  • the secondary flow obstacles 11a, 11'a and 12a lamellar or rib-shaped and transverse to the local flow direction the flow of first order at or on the primary Flow obstacles arranged.
  • the pipe cross section is through a Normal projection of the primary flow obstacles 11, 11 'and 12 in Main flow direction largely completely covered.
  • the pipe cross section is through the Normal projections of the individual flow obstacles 11, 11 'and 12 not covered several times; or the projection is only marginal Overlap zones on.
  • the tube 3 is cylindrical and the Primary flow obstacles 11, 11 'and 12 form one mirror - symmetric arrangement, with a symmetry plane in which the Pipe axis is.
  • the pair 11, 11 'of segmental, largely in one common structure elements form a bottleneck, within the wing or web-shaped structural element 12, the plane of the two other structural elements 11, 11 'is arranged crossing.
  • the basic structure is a Cross-channel structure, in which a plurality of zigzag folded Sheets 13, 14 (and dash-dotted line indicated plates 13 ', 14') the form primary flow obstacles.
  • Ribs 13a and / or wire-like Elevations 13b are on the metal surfaces of the cross channel structure arranged. Of these secondary flow obstacles 13a, 13b only one example shown.
  • the ribs 13a are advantageous sharp-edged and serve as demolition edges on the overflowed Fold edges.
  • Fig. 3 shows internals 10 of an inventive mixer 1 with two segmental structural elements 15.
  • the secondary flow obstacles 15a of the structural elements 15 are lamellar.
  • the inside of the tube 3 is indicated by the dotted lines 31.
  • a cross section through the Structural elements 15 is shown in FIG. 4.
  • the arrows 21 indicate that How back flows form behind the structural elements 15.
  • Fig. 5 shows a built-in with two vanes 15 as structural elements. at one of the vanes 15 are secondary flow obstacles 15a shown.
  • Fig. 6 are secondary flow obstacles 16a in four fields shown in the first as a perspective view and in the other Partial images only as cross-sectional profiles. These obstacles 16a are ribbed and on an overflowed surface of a primary Flow obstruction 16 is arranged.
  • FIGS. 7 and 8 show secondary flow obstacles 17a and 18a, respectively; the linear elements form: one with toothed edge and one with separate teeth 19. Examples of other forms of the teeth 19 are in three Sub-images of Fig. 9 shown.
  • the linear element 17a may instead of a toothed edge also have a wavy edge. Such geometric modification at the edge of the primary flow obstacle gives an extension of the edge, which advantageously a reinforced Training turbulence entails.
  • FIG. 10 shows milled secondary flow obstacles (three partial images) which are shown in FIG Form of linear elements on one edge of the primary Flow obstruction are arranged.
  • Fig. 11 shows secondary flow obstacles, each at the primary Flow obstacle produced by forming its edges: slightly bent (first part), strongly bent (second part) and bent twice (third partial image), as indicated by arrows. Similar forms of flow obstacles may also be due Welding of metal strips to the primary flow obstacles will be realized.
  • the embodiment of FIG. 1 contains a feed point in the pipe section 30 100 for additives.
  • the feed 100 opens with advantage in a zone of Mixed areas, in which the influence of the flow through the geometric modifications is particularly strong. It can also, a plurality of feed 100 may be provided. Is more advantageous but a single feed 100, so with respect to the fixtures 10th can be optimally arranged. Experience has shown that one Multiple Feed Points 100 for a single additive with problems is connected, which are omitted at a single feed 100.
  • the mixer 1 according to the invention is used to carry out a Used mixing method in which the fluid to be mixed 50 in a Preferred direction is transported by the mixer 1. Regarding this Preferred direction is a better mixing quality than in the reverse Achieved direction.
  • the mixing quality improves when the Flow on the inlet side is turbulent. It can therefore also for the inventive mixing method be advantageous if the fluid 20, before it is passed into the mixing internals 10, in one hydrodynamic state is brought in which it is turbulent Having flow components or increased turbulence.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
EP04405218A 2003-05-08 2004-04-08 Mélangeur statique Expired - Lifetime EP1493485B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405218A EP1493485B1 (fr) 2003-05-08 2004-04-08 Mélangeur statique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405324 2003-05-08
EP03405324 2003-05-08
EP04405218A EP1493485B1 (fr) 2003-05-08 2004-04-08 Mélangeur statique

Publications (2)

Publication Number Publication Date
EP1493485A1 true EP1493485A1 (fr) 2005-01-05
EP1493485B1 EP1493485B1 (fr) 2006-05-31

Family

ID=33436137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405218A Expired - Lifetime EP1493485B1 (fr) 2003-05-08 2004-04-08 Mélangeur statique

Country Status (1)

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EP (1) EP1493485B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1835139A2 (fr) * 2006-03-15 2007-09-19 Robert Bosch Gmbh Procédé de fabrication d'un dispositif de mélange pour un dispositif de traitement des gaz d'échappement, dispositif de mélange pour un dispositif de traitement des gaz d'échappement tout comme agencement doté d'un tel dispositif de mélange
US9403133B2 (en) 2011-01-15 2016-08-02 Statiflo International Limited Static mixer assembly
CN109701410A (zh) * 2019-02-21 2019-05-03 中南大学 一种管道静态混合矿化装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123178A (en) * 1977-03-21 1978-10-31 General Signal Corporation In-line blender
GB2032791A (en) * 1978-10-13 1980-05-14 Degremont Mixing fluids
US4710326A (en) * 1986-08-29 1987-12-01 Seah Alexander M Corrugated packing and methods of use
US4899812A (en) * 1988-09-06 1990-02-13 Westinghouse Electric Corp. Self-securing turbulence promoter to enhance heat transfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123178A (en) * 1977-03-21 1978-10-31 General Signal Corporation In-line blender
GB2032791A (en) * 1978-10-13 1980-05-14 Degremont Mixing fluids
US4710326A (en) * 1986-08-29 1987-12-01 Seah Alexander M Corrugated packing and methods of use
US4899812A (en) * 1988-09-06 1990-02-13 Westinghouse Electric Corp. Self-securing turbulence promoter to enhance heat transfer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1835139A2 (fr) * 2006-03-15 2007-09-19 Robert Bosch Gmbh Procédé de fabrication d'un dispositif de mélange pour un dispositif de traitement des gaz d'échappement, dispositif de mélange pour un dispositif de traitement des gaz d'échappement tout comme agencement doté d'un tel dispositif de mélange
EP1835139A3 (fr) * 2006-03-15 2009-04-08 Robert Bosch Gmbh Procédé de fabrication d'un dispositif de mélange pour un dispositif de traitement des gaz d'échappement, dispositif de mélange pour un dispositif de traitement des gaz d'échappement tout comme agencement doté d'un tel dispositif de mélange
US9403133B2 (en) 2011-01-15 2016-08-02 Statiflo International Limited Static mixer assembly
CN109701410A (zh) * 2019-02-21 2019-05-03 中南大学 一种管道静态混合矿化装置
CN109701410B (zh) * 2019-02-21 2024-03-29 中南大学 一种管道静态混合矿化装置

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