EP0226879A1 - Static mixer for fluids containing or composed of solid particles - Google Patents

Static mixer for fluids containing or composed of solid particles Download PDF

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Publication number
EP0226879A1
EP0226879A1 EP86116622A EP86116622A EP0226879A1 EP 0226879 A1 EP0226879 A1 EP 0226879A1 EP 86116622 A EP86116622 A EP 86116622A EP 86116622 A EP86116622 A EP 86116622A EP 0226879 A1 EP0226879 A1 EP 0226879A1
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EP
European Patent Office
Prior art keywords
webs
mixing device
mixing
solid particles
static mixing
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
EP86116622A
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German (de)
French (fr)
Other versions
EP0226879B1 (en
Inventor
Hans Meyer
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 AG
Original Assignee
Sulzer AG
Gebrueder Sulzer 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 AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to AT86116622T priority Critical patent/ATE52939T1/en
Publication of EP0226879A1 publication Critical patent/EP0226879A1/en
Application granted granted Critical
Publication of EP0226879B1 publication Critical patent/EP0226879B1/en
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
    • B01F25/4316—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
    • B01F25/43161—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 composed of consecutive sections of flat pieces of material

Definitions

  • the invention relates to a static mixing device for fluids containing or consisting of solid particles according to the preamble of claim 1.
  • the known static mixing devices such as are described, for example, in Swiss Patents 642 564, 547 120 or 578 370, all have the disadvantage that they tend to become blocked when fluids containing or consisting of solid particles are used.
  • Such fluids can e.g. consist of different granules which are to be mixed homogeneously with one another or be liquids which contain fibers or other solid particles, for example.
  • Such cases occur, for example, in municipal wastewater treatment, e.g. when mixing chemicals in sludge, in the paper industry or also in the food industry, e.g. when mixing fruit pieces in yogurt.
  • the invention is based, for media of the type mentioned above, i. even fluids consisting of piece goods or containing piece goods to create a blockage-free, static mixing device, which also ensures homogeneous mixing with an acceptable pressure loss.
  • the design according to the invention of a static mixing device prevents the settling or catching of solid particles between the webs and the casing tube wall or between crossing webs with simple means, so that a perfect mixing can be carried out in the device.
  • the outer webs or the one ends of the inner webs can be welded or soldered to the tube wall, for example.
  • the device cross section can be both circular and have a different contour, e.g. be a rectangle.
  • the web cross sections can taper towards the free ends.
  • the cross sections and the longitudinal section shapes advantageously have aerodynamic contours, e.g. rectangular, elliptical or semicircular.
  • the angle between the webs and the tube axis is advantageously in the range from 3u to 60 °, in particular 45 and 30 °.
  • an advantageous development of the invention can consist in that the successive ones Mixing elements are each arranged at an angle, in particular offset by 90 °, in the housing. This ensures spatial homogeneity.
  • Another application may, for example in the mixing flocculant chemicals in secondary sewage sludge exist for sludge dewatering in front of a Z entrifugaldekanter of a municipal sewage treatment plant.
  • the installation of a mixer according to the invention takes into account the requirement for an efficient use of the quantity of chemicals for rapid and uniform mixing.
  • each mixing element consists of three webs 2a to 2c, with a space remaining between the crossing webs, as can be clearly seen from FIGS. 2a to 2d. It may be expedient to provide groove-like constrictions at the crossing points in order to enlarge the free space.
  • FIGS. 1 to 2d is a particularly advantageous embodiment, it is in principle also possible, depending on the process in which the mixing device is to be used, to design the mixing device with a plurality of webs. 3 and 4, a mixing element is shown, which is arranged in a tube 3 and which consists of two outer webs 4a and 4e and inner webs 4b to 4d.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Separation By Absorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Detergent Compositions (AREA)
  • Lubricants (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The static mixing device employs mixing elements, each of which has at least three transversely spaced webs. The webs are spaced transversely from each other to provide gaps through which a fluid may pass during mixing. In addition, each web while being secured to the casing at the upper ends relative to a downward flow has lower terminal ends which are spaced from the casing to provide further gaps through which the liquid may pass during a downward descent.

Description

Die Erfindung betrifft eine statische Mischvorrichtung für Feststoffteilchen enthaltende oder daraus bestehende Fluide gemäss Oberbegriff von Patentanspruch 1.The invention relates to a static mixing device for fluids containing or consisting of solid particles according to the preamble of claim 1.

Die bekannten statischen Mischvorrichtungen, wie sie beispielsweise in den schweizerischen Patentschriften 642 564, 547 120 oder 578 370 beschrieben sind, weisen alle den Nachteil auf, dass sie zur Verstopfung bei Einsatz von Feststoffteilchen enthaltenden oder daraus bestehenden Fluiden neigen. Derartige Fluide können z.B. aus verschiedenen Granulaten bestehen, die miteinander homogen vermischt werden sollen oder Flüssigkeiten sein, welche beispielsweise Fasern oder andere Feststoffteilchen enthalten.The known static mixing devices, such as are described, for example, in Swiss Patents 642 564, 547 120 or 578 370, all have the disadvantage that they tend to become blocked when fluids containing or consisting of solid particles are used. Such fluids can e.g. consist of different granules which are to be mixed homogeneously with one another or be liquids which contain fibers or other solid particles, for example.

Derartige Fälle kommen beispielsweise in der kommunalen Abwasseraufbereitung, z.B. beim Einmischen von Chemikalien in Schlamm, in der Papierindustrie oder auch in der Nahrungsmittelindustrie, z.B. beim Einmischen von Fruchtstückchen in Joghurt vor.Such cases occur, for example, in municipal wastewater treatment, e.g. when mixing chemicals in sludge, in the paper industry or also in the food industry, e.g. when mixing fruit pieces in yogurt.

Der Erfindung liegt die Aufgabe zugrunde, für Medien der vorstehend genannten Art, d.h. selbst aus Stückgut bestehende oder Stückgut enthaltende Fluide eine verstopfungsfreie, statische Mischvorrichtung zu schaffen, welche darüber hinaus eine homogene Vermischung bei annehmbarem Druckverlust sicherstellt.The invention is based, for media of the type mentioned above, i. even fluids consisting of piece goods or containing piece goods to create a blockage-free, static mixing device, which also ensures homogeneous mixing with an acceptable pressure loss.

Diese Aufgabe wird erfindungsgemäss mit Merkmalen gemäss dem Kennzeichen des Patentanspruchs 1 gelöst.This object is achieved according to the invention with features according to the characterizing part of patent claim 1.

Die erfindungsgemässe Ausbildung einer statischen Mischvorrichtung verhindert mit einfachen Mitteln das Absetzen oder Verfangen von Feststoffteilchen zwischen Stegen und Mantelrohrwand bzw. zwischen sich kreuzenden Stegen, so dass ein einwandfreies Vermischen in der Vorrichtung durchgeführt werden kann.The design according to the invention of a static mixing device prevents the settling or catching of solid particles between the webs and the casing tube wall or between crossing webs with simple means, so that a perfect mixing can be carried out in the device.

Die äusseren Stege bzw. die einen Enden der inneren Stege können beispielsweise mit der Rohrwand verschweisst oder verlötet werden.The outer webs or the one ends of the inner webs can be welded or soldered to the tube wall, for example.

Der Vorrichtungsquerschnitt kann sowohl kreisförmig sein als auch eine andere Kontur aufweisen, z.B. ein Rechteck sein.The device cross section can be both circular and have a different contour, e.g. be a rectangle.

Zu einem verbesserten Strömungsverhalten in bezug auf eine gute Ablösung an den Stegenden, können die Stegquerschnitte gegen die freien Enden zu sich verjüngen.To improve flow behavior with regard to good detachment at the web ends, the web cross sections can taper towards the free ends.

Die Querschnitte sowie die Längsschnittformen weisen vorteilhaft strömungsgünstige Konturen auf, z.B. rechteckig, eliptisch oder halbkreisförmig. Der Winkel zwischen den Stegen und der Rohrachse liegt vorteilhaft im Bereich von 3u bis 60°, insbesondere 45 und 30°.The cross sections and the longitudinal section shapes advantageously have aerodynamic contours, e.g. rectangular, elliptical or semicircular. The angle between the webs and the tube axis is advantageously in the range from 3u to 60 °, in particular 45 and 30 °.

Bei Anordnung von mehreren Mischelementen in einer Mischvorrichtung kann eine vorteilhafte Weiterbildung der Er- findung darin bestehen, dass die aufeinanderfolgenden Mischelemente jeweils um einen Winkel, insbesondere von 90° gegeneinander versetzt im Gehäuse angeordnet sind. Hierdurch wird eine räumliche Homogenität erzielt.If several mixing elements are arranged in a mixing device, an advantageous development of the invention can consist in that the successive ones Mixing elements are each arranged at an angle, in particular offset by 90 °, in the housing. This ensures spatial homogeneity.

Vorteilhafte Anwendungen, die bereits experimentell erprobt worden sind, bestehen z.B. darin, dass eingefärbtes und nicht eingefärbtes Kunststoffgranulat durch eine Fall-Leitung in die Mischvorrichtung eingeleitet wird. Bei der Mischung kann eine gleichmässige Farbverteilung erzielt werden.Advantageous applications that have already been experimentally tested are e.g. in that colored and non-colored plastic granulate is introduced into the mixing device through a drop pipe. When mixing, an even color distribution can be achieved.

Eine andere Anwendung kann z.B. im dem Einmischen von Flockungs-Chemikalien in Sekundär-Klärschlamm vor einem Zentrifugaldekanter eines kommunalen Klärwerks zur Schlammentwässerung bestehen. Durch den Einbau eines erfindungsgemässen Mischers wird der für eine wirksame Nutzung der Chemikalienmenge gestellten Forderung nach rascher und gleichmässiger Vermischung Rechnung getragen.Another application may, for example in the mixing flocculant chemicals in secondary sewage sludge exist for sludge dewatering in front of a Z entrifugaldekanter of a municipal sewage treatment plant. The installation of a mixer according to the invention takes into account the requirement for an efficient use of the quantity of chemicals for rapid and uniform mixing.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen erläutert.

  • Fig. 1 zeigt in perspektivischer Darstellungsweise ein zylindrisches Mantelrohr, in welchem zwei Mischelemente angeordnet sind,
  • Fig. 2a - 2d je einen Querschnitt durch ein solches Mischelement, und zwar in vier jeweils um 90° gegeneinander verschwenkten Stellungen.
  • Fig. 3 und 4 zeigen einen Querschnitt bzw. einen Längsschnitt durch eine abgewandelte Form eines Mischelementes.
The invention is explained below using exemplary embodiments.
  • 1 shows a perspective representation of a cylindrical jacket tube in which two mixing elements are arranged,
  • 2a-2d each have a cross section through such a mixing element, in four positions pivoted by 90 ° relative to each other.
  • 3 and 4 show a cross section and a longitudinal section through a modified form of a mixing element.

Gemäss Fig. 1 sind in einem Mantelrohr 1 zwei gegeneinander um 90° verschwenkte Mischelemente angeordnet. Hierbei besteht jedes Mischelement aus drei Stegen 2a bis 2c, wobei zwischen den sich kreuzenden Stegen ein Zwischenraum frei bleibt, wie aus den Fig. 2a bis 2d deutlich hervorgeht. Es kann zweckmässig sein, an den Kreuzungsstellen nutenartige Einschnürungen vorzusehen, um den freien Zwischenraum zu vergrössern.1, two mixing elements pivoted by 90 ° relative to one another are arranged in a casing tube 1. Here, each mixing element consists of three webs 2a to 2c, with a space remaining between the crossing webs, as can be clearly seen from FIGS. 2a to 2d. It may be expedient to provide groove-like constrictions at the crossing points in order to enlarge the free space.

Zwar handelt es sich bei der in den Fig. l bis 2d dargestellten Ausführungsform der Erfindung um eine besonders vorteilhafte Ausbildung, jedoch ist es grundsätzlich auch möglich, je nach dem Prozess, in welchen die Mischvorrichtung eingesetzt werden soll, die Mischvorrichtung mit mehreren Stegen auszubilden. In Fig. 3 und 4 ist ein Mischelement dargestellt, welches in einem Rohr 3 angeordnet ist und das aus zwei äuss.eren Stegen 4a und 4e und inneren Stegen 4b bis 4d besteht.Although the embodiment of the invention shown in FIGS. 1 to 2d is a particularly advantageous embodiment, it is in principle also possible, depending on the process in which the mixing device is to be used, to design the mixing device with a plurality of webs. 3 and 4, a mixing element is shown, which is arranged in a tube 3 and which consists of two outer webs 4a and 4e and inner webs 4b to 4d.

Claims (4)

1. Statische Mischvorrichtung für Feststoffteilchen enthaltende oder daraus bestehende Fluide, wobei die Mischeinrichtung aus einem rohrartigen Gehäuse mit mindestens einem darin angeordneten Mischelement besteht, welches mindestens drei, gegenüber der Längsachse des Gehäuses geneigte, sich kreuzende Stege aufweist, wobei die Aussenkontur der äusseren Stege der Rohrwand angepasst sind, dadurch gekennzeichnet, dass die Aussenkanten der äusseren Stege sowie die einen Enden der inneren Stege an ihrem Endbereich spaltfrei mit der Rohrwand verbunden sind, und dass alle Stege an ihrem anderen Ende einen Abstand von der gegenüberliegenden Rohrwand, sowie untereinander an ihren Kreuzungsstellen einen freien Zwischenraum aufweisen.1. Static mixing device for fluids containing or consisting of solid particles, wherein the mixing device consists of a tubular housing with at least one mixing element arranged therein, which has at least three cross bars that are inclined relative to the longitudinal axis of the housing, the outer contour of the outer bars of the Pipe wall are adapted, characterized in that the outer edges of the outer webs and one end of the inner webs are connected to the tube wall at their end region without a gap, and that all webs at their other end are at a distance from the opposite tube wall and at their crossing points have a free space. 2. Statische Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich die Stege gegen ihr freies Ende zu verjüngen.2. Static mixing device according to claim 1, characterized in that the webs taper towards their free end. 3. Statische Mischvorrichtung mit mehreren Mischelementen nach Anspruch 1, dadurch gekennzeichnet, dass die aufeinanderfolgenden Mischelemente jeweils um 90° gegeneinander versetzt im Mantelrohr angeordnet sind.3. Static mixing device with several mixing elements according to claim 1, characterized in that the successive mixing elements are each offset by 90 ° from one another in the casing tube. 4. Statische Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Stege im Bereich ihrer Kreuzungsstellen Einschnürungen aufweisen.4. Static mixing device according to claim 1, characterized in that the webs have constrictions in the region of their crossing points.
EP86116622A 1985-12-11 1986-11-29 Static mixer for fluids containing or composed of solid particles Expired - Lifetime EP0226879B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116622T ATE52939T1 (en) 1985-12-11 1986-11-29 STATIC MIXING DEVICE FOR FLUIDS CONTAINING OR CONSISTING OF SOLID PARTICULATES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5282/85 1985-12-11
CH5282/85A CH669336A5 (en) 1985-12-11 1985-12-11

Publications (2)

Publication Number Publication Date
EP0226879A1 true EP0226879A1 (en) 1987-07-01
EP0226879B1 EP0226879B1 (en) 1990-05-23

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EP86116622A Expired - Lifetime EP0226879B1 (en) 1985-12-11 1986-11-29 Static mixer for fluids containing or composed of solid particles

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US (1) US4758098A (en)
EP (1) EP0226879B1 (en)
JP (1) JPH0817927B2 (en)
AT (1) ATE52939T1 (en)
AU (1) AU601384B2 (en)
CA (1) CA1283652C (en)
CH (1) CH669336A5 (en)
DE (1) DE3671386D1 (en)
DK (1) DK167177B1 (en)
ES (1) ES2002196A6 (en)
FI (1) FI86808C (en)

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EP0652182A1 (en) * 1993-11-04 1995-05-10 Yuugen Kaisha Ohl Hydrodynamics Laboratory Ozone reaction apparatus
DE29601936U1 (en) * 1996-02-08 1996-04-18 Preussag Anlagenbau Gmbh, 30625 Hannover Static mixer
EP0727249A1 (en) * 1995-02-02 1996-08-21 Sulzer Chemtech AG Static mixer for very viscous liquids
EP0752270A2 (en) * 1995-07-03 1997-01-08 Basf Aktiengesellschaft Method and apparatus for the continuous production of polymers
EP0752268A2 (en) * 1995-07-03 1997-01-08 Basf Aktiengesellschaft Method and apparatus for the continuous production of polymers
EP0760253A1 (en) * 1995-08-30 1997-03-05 Sulzer Chemtech AG Static mixer for viscous fluids
DE19700462C2 (en) * 1997-01-09 1999-07-01 Guenther Schwald Static mixer
EP2620208A1 (en) 2012-01-25 2013-07-31 Alstom Technology Ltd Gas mixing arrangement
EP2277620B2 (en) † 2007-06-22 2015-02-18 Sulzer Chemtech AG Static mixing element

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WO2010066457A1 (en) * 2008-12-10 2010-06-17 Technische Universiteit Eindhoven Static mixer comprising a static mixing element, method of mixing a fluid in a conduit and a formula for designing such a static mixing element
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Cited By (16)

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Publication number Priority date Publication date Assignee Title
EP0652182A1 (en) * 1993-11-04 1995-05-10 Yuugen Kaisha Ohl Hydrodynamics Laboratory Ozone reaction apparatus
CN1047741C (en) * 1995-02-02 1999-12-29 苏舍化学技术有限公司 Static mixer apparatus for highly viscous media
EP0727249A1 (en) * 1995-02-02 1996-08-21 Sulzer Chemtech AG Static mixer for very viscous liquids
US5620252A (en) * 1995-02-02 1997-04-15 Sulzer Management Ag Static mixer apparatus for highly viscous media
EP0752268A2 (en) * 1995-07-03 1997-01-08 Basf Aktiengesellschaft Method and apparatus for the continuous production of polymers
EP0752268A3 (en) * 1995-07-03 1997-03-26 Basf Ag Method and apparatus for the continuous production of polymers
EP0752270A3 (en) * 1995-07-03 1997-03-26 Basf Ag Method and apparatus for the continuous production of polymers
EP0752270A2 (en) * 1995-07-03 1997-01-08 Basf Aktiengesellschaft Method and apparatus for the continuous production of polymers
EP0760253A1 (en) * 1995-08-30 1997-03-05 Sulzer Chemtech AG Static mixer for viscous fluids
US5688047A (en) * 1995-08-30 1997-11-18 Sulzer Chemtech Ag Static mixer with monolithic mixing elements providing an increased resistance force during mixing
DE29601936U1 (en) * 1996-02-08 1996-04-18 Preussag Anlagenbau Gmbh, 30625 Hannover Static mixer
DE19700462C2 (en) * 1997-01-09 1999-07-01 Guenther Schwald Static mixer
EP2277620B2 (en) † 2007-06-22 2015-02-18 Sulzer Chemtech AG Static mixing element
EP2158027B2 (en) † 2007-06-22 2016-04-27 Sulzer Chemtech AG Static mixing element
EP2620208A1 (en) 2012-01-25 2013-07-31 Alstom Technology Ltd Gas mixing arrangement
US10232328B2 (en) 2012-01-25 2019-03-19 General Electric Technology Gmbh Gas mixing arrangement

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Publication number Publication date
ATE52939T1 (en) 1990-06-15
CA1283652C (en) 1991-04-30
FI863868A (en) 1987-06-12
FI863868A0 (en) 1986-09-25
AU6638586A (en) 1987-06-18
AU601384B2 (en) 1990-09-13
DK424586A (en) 1987-06-12
JPH0817927B2 (en) 1996-02-28
FI86808B (en) 1992-07-15
US4758098A (en) 1988-07-19
EP0226879B1 (en) 1990-05-23
FI86808C (en) 1992-10-26
DK424586D0 (en) 1986-09-04
JPS62140631A (en) 1987-06-24
CH669336A5 (en) 1989-03-15
ES2002196A6 (en) 1988-07-16
DK167177B1 (en) 1993-09-13
DE3671386D1 (en) 1990-06-28

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