DE3520772A1 - Mixing appliance - Google Patents

Mixing appliance

Info

Publication number
DE3520772A1
DE3520772A1 DE19853520772 DE3520772A DE3520772A1 DE 3520772 A1 DE3520772 A1 DE 3520772A1 DE 19853520772 DE19853520772 DE 19853520772 DE 3520772 A DE3520772 A DE 3520772A DE 3520772 A1 DE3520772 A1 DE 3520772A1
Authority
DE
Germany
Prior art keywords
mixing
delta
flow channel
mixing device
body according
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Withdrawn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
DE19853520772
Other languages
German (de)
Inventor
Ralf Dipl.-Ing. 4630 Bochum Wehrlein
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.)
Interatom Internationale Atomreaktorbau GmbH
Original Assignee
Interatom Internationale Atomreaktorbau 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 Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Priority to DE19853520772 priority Critical patent/DE3520772A1/en
Publication of DE3520772A1 publication Critical patent/DE3520772A1/en
Withdrawn legal-status Critical Current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
    • B01F25/40—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/10—Component parts of trickle coolers for feeding gas or vapour
    • F28F25/12—Ducts; Guide vanes, e.g. for carrying currents to distinct zones
    • 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
    • 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
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • 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
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • B01F25/43171—Profiled blades, wings, wedges, i.e. plate-like element having one side or part thicker than the other
    • 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
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431971—Mounted on the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/0015—Whirl chambers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

It is proposed, with respect to conventional mixing devices according to the principle of the delta blade having two breakaway edges in a flow duct, as used especially for cooling towers in power stations, that said delta blades be arranged asymmetrically. Experiments have shown that this arrangement does not produce significantly higher pressure drops but results in considerably better mixing. <IMAGE>

Description

MischvorrichtungMixing device

Die vorliegende Erfindung betrifft eine Mischvorrichtung mit einem oder mehreren Mischkörpern nach dem Prinzip des Delta-Flügels mit zwei Abrißkanten in einem Strömungskanal.The present invention relates to a mixing device having a or several mixing bodies based on the principle of the delta wing with two tear-off edges in a flow channel.

Mischvorrichtungen dieser Art werden insbesondere für Kühltürme an Kraftwerken vorgeschlagen und ausführlich beschrieben in den deutschen Patentanmeldungen 2 911 873, 2 925 461, 2 925 462, 3 023 982 und 3 043 239. In allen diesen Anmeldungen werden nur symmetrische Delta-Flügel dargestellt und beschrieben und zum Teil auch ausdrücklich beansprucht. Auch in der Dissertation: "Untersuchung periodischer Wirbelablösungen und Kräfte an schlanken scharfkantigen Körpern" von Eckhard Huthloff aus dem Jahre 1972 an der Fakultät für Maschinenwesen der Technischen Universität Hannover wird nur über Untersuchungen an symmetrischen Körpern berichtet.Mixing devices of this type are used in particular for cooling towers Power plants proposed and described in detail in the German patent applications 2 911 873, 2 925 461, 2 925 462, 3 023 982 and 3 043 239. In all of these applications only symmetrical delta wings are shown and described and sometimes also expressly claimed. Also in the dissertation: "Investigation of periodic vortex shedding and forces on slim, sharp-edged bodies "by Eckhard Huthloff from 1972 at the Faculty of Mechanical Engineering of the Technical University of Hanover only reports on studies on symmetrical bodies.

In Versuchen hat sich gezeigt, daß symmetrische Delta-Flügel an ihren beiden Abrißkanten zwei symmetrische Wirbel erzeugen, die sich jeweils gut durchmischen, aber kaum Massen untereinander austauschen.Tests have shown that symmetrical delta wings on their both tear-off edges generate two symmetrical vortices, each of which mixes well, but hardly ever exchange masses with one another.

Aufgabe der vorliegenden Erfindung ist eine Mischvorrichtung mit dem geringen Druckverlust des Delta-Flügels, aber mit einer besseren Durchmischung.The object of the present invention is a mixing device with the low pressure loss of the delta wing, but with better mixing.

Zur Lösung dieser Aufgabe wird eine Mischvorrichtung nach dem ersten Anspruch vorgeschlagen. Im Versuch ergab sich folgendes: Aufgrund der Geometrie der asymmetrischen Delta-Flügel bildeten sich zwei verschieden große Wirbel aus. Von der größeren Hälfte des Flügels strömt ein Teil des Wirbels auf die andere Hälfte. Dort wird er mit dem schneller rotierenden Wirbel vermischt. Die Wirbelkerne der Doppelwirbel bleiben aber erhalten. Hinter dem Flügel vermischen sich die Randzonen der beiden Wirbel untereinander. Aufgrund derEigenrotation vermischt sich jeder Wirbel selbst, aber durch die in benachbarten Wirbeln unterschiedlichen Rotationsgeschwindigkeiten vermischen sich die Wirbel auch untereinander.To solve this problem, a mixing device according to the first Proposed claim. In the experiment it turned out the following: Due the geometry of the asymmetrical delta wings formed two different sizes Eddy off. Part of the vortex flows up from the larger half of the wing the other half. There it is mixed with the faster rotating vortex. The vortex cores of the double vortices are retained. Mix behind the wing the edge zones of the two vertebrae under each other. Mixed due to its own rotation each vertebra itself, but due to the different ones in neighboring vertebrae The vortices also mix with each other at speeds of rotation.

Im 2. Anspruch wird vorgeschlagen, daß die Rückseite des Delta-Flügels die Form leines ungleichschenkeligen Dreiecks darstellt. Dabei erwies es sich als zweckmäßig, wenn die der Strömung entgegengerichtete Spitze des Dreiecks etwa auf einem Drittel der Breite dieses Dreiecks angeordnet war.In the 2nd claim it is proposed that the back of the delta wing represents the shape of a non-isosceles triangle. It turned out to be expedient if the tip of the triangle that is opposite to the flow is approximately on one third of the width of this triangle.

Im 3. Anspruch wird ein gleichschenkeliges Dreieck vorgeschlagen, das aber unsymmetrisch angeordnet ist. Auch hier kann die der Strömung entgegengerichtete Spitze des Dreiecks etwa auf einem Drittel seiner Breite quer zur Strömungsrichtung angeordnet werden.In the third claim an isosceles triangle is proposed, but that is arranged asymmetrically. Here, too, the direction opposite to the flow can Tip of the triangle about a third of its width across the direction of flow to be ordered.

Im 4. Anspruch wird ein Mischkörper vorgeschlagen, der aus einer ebenen oder leicht gewölbten Dreiecksfläche besteht. Dieser Mischkörper hat eine ähnliche Wirkung wie ein räumlicher Delta-Flügel, ist aber aus einem Blech leichter herzustellen und kann mit einer einzigen Schweißnaht an der Basis des Dreiecks mit der Kanalwand verbunden werden. Die leicht gewölbte Dreiecksfläche ist strömungstechnisch von ähnlicher Bedeutung, hat aber, statisch betrachtet, besondere Vorteile. In beiden Fällen ist von Bedeutung, daß die Abrißkanten, soweit fertigungstechnisch machbar, scharfkantig ausgebildet werden.In the 4th claim a mixing body is proposed which consists of a flat or slightly curved triangular surface. This mixing body has a similar one Effect like a three-dimensional delta wing, but is easier to make from sheet metal and can with a single weld at the base of the triangle with the duct wall get connected. The slightly curved triangular surface is aerodynamically from similar meaning, but, from a static point of view, has particular advantages. In both Felling is of Meaning that the tear-off edges, as far as production engineering feasible, sharp-edged.

Im 5. Anspruch wird vorgeschlagen, daß ein oder mehrere asymmetrisch angeordnete Delta-Flügel an der Innenseite eines runden oder eckigen Strömungskanals angeordnet sind, Da sich in Strömungsrichtung hinter diesen Delta-Flügeln Wirbelzonen bilden, die sich etwa kegelförmig erweitern, so genügen einige wenige Delta-Flügel am Umfang, um eine ausreichende Druchwirbelung und Vermischung zu erzielen. Die Mitte des Strömungskanals kann für Montage- und Handhabungszwecke freibleiben von jeglichen Einbauten.In the 5th claim it is proposed that one or more asymmetrically arranged delta wings on the inside of a round or angular flow channel are arranged, as there are vortex zones behind these delta wings in the direction of flow form, which expand roughly conically, a few delta wings are sufficient on the circumference in order to achieve sufficient turbulence and mixing. the The middle of the flow channel can be left free for assembly and handling purposes any fixtures.

Die Figuren 1 bis 5 zeigen mögliche Ausführungsbeispiele der Erfindung.Figures 1 to 5 show possible embodiments of the invention.

Figur 1 zeigt die Ausbildung von unterschiedlichen Wirbeln auf der Rückseite eines geschnitten daraestellten Delta-Flügels.Figure 1 shows the formation of different vertebrae on the Back of a cut delta wing.

Figur 2 zeigt in Strömungsrichtung betrachtet einen Querschnitt durch einen kreisrunden Strömungskanal mit 4 über den Umfang verteilten asymmetrischen und räumlichen Delta-Flügeln, die mit einer Seite an der Kanalwand anliegen.FIG. 2 shows, viewed in the direction of flow, a cross section through a circular flow channel with 4 asymmetrical ones distributed over the circumference and spatial delta wings, one side of which abuts the duct wall.

Figur 3 zeigt einen Längsschnitt durch Figur 2.FIG. 3 shows a longitudinal section through FIG.

Figur 4 zeigt ähnlich wie in Figur 2 vier über den Umfang verteilte Delta-Flügel, die jeweils aus einem ebenen, gleichseitigen Dreieck bestehen, das mit seiner Basiskante asymmetrisch an der Kanalwand befestigt ist.In a manner similar to that in FIG. 2, FIG. 4 shows four distributed over the circumference Delta wings, each consisting of a flat, equilateral triangle, the is attached with its base edge asymmetrically to the duct wall.

Figur 5 zeigt ähnlich zu Figur 3 einen Längsschnitt durch Figur 4.FIG. 5 shows, similar to FIG. 3, a longitudinal section through FIG. 4.

- Leerseite -- blank page -

Claims (5)

Mischvorrichtung Patentansprüche 1. Mischvorrichtung mit einem oder mehreren Mischkörpern nach dem Prinzip des Delta-Flügels mit zwei Abrißkanten in einem Strömungskanal, dadurch gekennzeichnet, daß diese Delta-Flügel asymmetrisch zur Längsachse des Strömungskanals angeordnet sind.Mixing device claims 1. Mixing device with one or several mixing bodies based on the principle of the delta wing with two tear-off edges in a flow channel, characterized in that this delta wing is asymmetrical are arranged to the longitudinal axis of the flow channel. 2. Mischkörper nach Anspruch 1, dadurch gekennzeichnet, daß seine Rückseite die Form eines ungleichschenkeligen Dreiecks darstellt.2. Mixing body according to claim 1, characterized in that its The back is in the shape of an isosceles triangle. 3. Mischkörper nach Anspruch 1, dadurch gekennzeichnet, daß seine Rückseite die Form eines gleichschenkeligen Dreiecks hat, aber seine Symmetrieebene zu einer durch seine Spitze gehenden Radialebene des Strömungskanals einen Winkel bildet.3. Mixing body according to claim 1, characterized in that its Back has the shape of an isosceles triangle, but its plane of symmetry to a radial plane of the flow channel passing through its tip forms. 4. Mischkörper nach Anspruch 1, aadurch gekennzeichnet, daß er aus einer ebenen oder leicht gewölbten Dreiecksfläche besteht.4. Mixing body according to claim 1, characterized in that it consists of consists of a flat or slightly curved triangular surface. 5. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein oder mehrere asymmetrisch angeordnete Delta-Flügel an der Innenseite eines runden oder eckigen Strömungskanals angeordnet sind.5. Mixing device according to claim 1, characterized in that a or several asymmetrically arranged delta wings on the inside a round or angular flow channel are arranged.
DE19853520772 1985-06-10 1985-06-10 Mixing appliance Withdrawn DE3520772A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853520772 DE3520772A1 (en) 1985-06-10 1985-06-10 Mixing appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853520772 DE3520772A1 (en) 1985-06-10 1985-06-10 Mixing appliance

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Publication Number Publication Date
DE3520772A1 true DE3520772A1 (en) 1986-12-11

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Family Applications (1)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011642A2 (en) * 1990-12-21 1992-07-09 Siemens Aktiengesellschaft Core containment device in nuclear reactor installation and emergency cooling on core melt-through
WO1992011928A1 (en) * 1990-12-28 1992-07-23 Byk Gulden Lomberg Chemische Fabrik Gmbh Dosage form for micro-bubble echo contrast agents
EP0619134A1 (en) * 1993-04-08 1994-10-12 ABB Management AG Mixing receptacle
EP0619456A1 (en) * 1993-04-08 1994-10-12 ABB Management AG Fuel supply system for combustion chamber
EP0623786A1 (en) * 1993-04-08 1994-11-09 ABB Management AG Combustion chamber
US5425580A (en) * 1990-12-28 1995-06-20 Byk Gulden Lomberg Chemische Fabrik Gmbh Dosage form for micro-bubble echo contrast agents
EP0675322A2 (en) * 1994-04-02 1995-10-04 ABB Management AG Premix burner
US5498155A (en) * 1993-04-08 1996-03-12 Abb Management Ag Mixing and flame stabilization appliance in a combustion chamber with premixed combustion
WO1996023981A1 (en) * 1995-02-03 1996-08-08 Bmw Rolls-Royce Gmbh Flow-guiding body for gas turbine combustion chambers
JP3527279B2 (en) 1993-04-08 2004-05-17 アルストム Mixing room

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011642A3 (en) * 1990-12-21 1992-08-06 Siemens Ag Core containment device in nuclear reactor installation and emergency cooling on core melt-through
US5343506A (en) * 1990-12-21 1994-08-30 Siemens Aktiengesellschaft Nuclear reactor installation with a core catcher device and method for exterior cooling of the latter by natural circulation
WO1992011642A2 (en) * 1990-12-21 1992-07-09 Siemens Aktiengesellschaft Core containment device in nuclear reactor installation and emergency cooling on core melt-through
US5425580A (en) * 1990-12-28 1995-06-20 Byk Gulden Lomberg Chemische Fabrik Gmbh Dosage form for micro-bubble echo contrast agents
WO1992011928A1 (en) * 1990-12-28 1992-07-23 Byk Gulden Lomberg Chemische Fabrik Gmbh Dosage form for micro-bubble echo contrast agents
EP0623786A1 (en) * 1993-04-08 1994-11-09 ABB Management AG Combustion chamber
CH687832A5 (en) * 1993-04-08 1997-02-28 Asea Brown Boveri Fuel supply for combustion.
EP0619456A1 (en) * 1993-04-08 1994-10-12 ABB Management AG Fuel supply system for combustion chamber
EP0619134A1 (en) * 1993-04-08 1994-10-12 ABB Management AG Mixing receptacle
US5498155A (en) * 1993-04-08 1996-03-12 Abb Management Ag Mixing and flame stabilization appliance in a combustion chamber with premixed combustion
US5513982A (en) * 1993-04-08 1996-05-07 Abb Management Ag Combustion chamber
JP3527279B2 (en) 1993-04-08 2004-05-17 アルストム Mixing room
US5658358A (en) * 1993-04-08 1997-08-19 Abb Management Ag Fuel supply system for combustion chamber
EP0675322A2 (en) * 1994-04-02 1995-10-04 ABB Management AG Premix burner
EP0675322A3 (en) * 1994-04-02 1996-05-15 Abb Management Ag Premix burner.
WO1996023981A1 (en) * 1995-02-03 1996-08-08 Bmw Rolls-Royce Gmbh Flow-guiding body for gas turbine combustion chambers
US5918465A (en) * 1995-02-03 1999-07-06 Bmw Rolls-Royce Gmbh Flow guiding body for a gas turbine combustion chamber

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