EP2113732A1 - Mixer-heat exchanger - Google Patents
Mixer-heat exchanger Download PDFInfo
- Publication number
- EP2113732A1 EP2113732A1 EP08405121A EP08405121A EP2113732A1 EP 2113732 A1 EP2113732 A1 EP 2113732A1 EP 08405121 A EP08405121 A EP 08405121A EP 08405121 A EP08405121 A EP 08405121A EP 2113732 A1 EP2113732 A1 EP 2113732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- mixer
- longitudinal axis
- mixing elements
- exchanger tubes
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/008—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using scrapers
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0052—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for mixers
Definitions
- the invention relates to a mixer heat exchanger for heating and cooling of flowable materials, arranged in a flow channel in a longitudinal axis of heat exchanger tubes and static mixing elements, wherein the heat exchanger tubes pass through the mixing elements substantially form-fitting openings.
- Heat exchange devices are known in many designs and common in the industry. Most heat exchangers have turbulent flow conditions.
- Known heat exchangers are tube bundle heat exchangers which are additionally equipped with static mixing elements on the inside in order to additionally improve the heat transfer at the tube wall.
- static mixer heat exchangers Thanks to static mixer heat exchangers, viscous liquids can be continuously processed with basic operations such as mixing, heat and mass transfer or chemical reaction technology.
- the high heat transfer capacity of static mixer heat exchangers and the excellent mixing performance in the laminar flow range allow use as a heat exchanger or reactor.
- the mixer heat exchanger Due to the achieved, very high Nusselt number and the large surface through the tube bundle, the mixer heat exchanger has an excellent volume-related heat transfer capacity. Another special feature of the mixer heat exchanger is the setting of a perfect temperature profile when exiting the heat exchanger, even for liquids with a viscosity>1'000'000 mPas. The reason lies in the very high mixing performance, which far exceeds the mixing performance of conventional heat exchangers.
- the invention has for its object to provide a mixer-heat exchanger of the type mentioned in the deposits on the surface of the heat exchanger tubes can be removed mechanically without disassembly of the heat exchange device in a simple manner.
- the mixer heat exchanger comprises at least one heat exchanger tube and a mixing element.
- the mixing elements are for example pairs of crossed web plates.
- the mixing elements are movable back and forth via a common actuating rod in the longitudinal axis of the flow channel.
- the heat exchanger tubes are closed on one side, wherein in the heat exchanger tubes protruding lances are provided for a heat exchange medium.
- the heat exchanger tubes can also be returned in a U-shape to the beginning of the tube; in this case, no lances are required.
- slidable cleaning bodies can additionally be placed on the heat exchanger tubes.
- the mixing elements can also be moved back and forth by changing the flow direction in the longitudinal axis of the flow channel.
- a device for heating and cooling flowable materials may also comprise a multiplicity of parallel mixer heat exchangers.
- Fig. 1 shown, in its longitudinal axis m adjacent one another Length L having mixing inserts 10, 12 for flowing in a flow channel media are traversed by a tube bundle 14 with parallel to the longitudinal axis m arranged heat exchanger tubes 16.
- Each mixing insert 10, 12 has a plurality of intersecting web plates 18 A, 18 B.
- the web plates 18 A, 18 B all have an equal width and lie in parallel to each other with the same intermediate or web spacing a arranged planes that form two intersecting plateaus.
- the planes each include an equally large angle of 45 ° with the longitudinal axis m.
- the adjoining mixing inserts 10, 12 are arranged alternately rotated by an angle of 90 ° about its longitudinal axis m against each other.
- slidable plates can be placed as a cleaning body on the heat exchanger tubes 16.
- Fig. 2 shows a mixer-heat exchanger 40.
- the mutually rotated by an angle of 90 ° about its longitudinal axis m mixing inserts 10, 12 are arranged in a tubular flow channel 22 with an inner circumferential surface 24 with a circular cross-section and a pipe or Strömungskanall Kunststoffsachse x of the mixer-heat exchanger 40 ,
- the longitudinal axes m of the mixing inserts 10, 12 lie in the longitudinal axis x of the flow channel 22.
- All web plates 18 A, 18 B extend within each mixing insert 10, 12 via their respective through the end faces of the mixing inserts 10, 12 and limited by the inner circumferential surface 24 of the flow channel 22, maximum possible length, wherein the contour of the web plates 18 A, 18 B is adapted to the circular cross-section of the flow channel 22 so that the web plates 18 A, 18 B with a small clearance to the inner circumferential surface 24 of the flow channel 22 adjacent.
- the heat exchanger tubes 16 pass through the web plates 18 A, 18 B via arranged in these openings 20 which have according to the angle between the web plate 18 A, 18 B and heat exchanger tube 16 an elliptical edge boundary.
- the web plates 18 A, 18 B are connected at their intersections at least partially via soldering or welding points.
- the individual mixing inserts 10, 12 When assembling the mixer-heat exchanger 40, the individual mixing inserts 10, 12 by the crossed arrangement of the corresponding number of web plates 18 A, 18 B prefabricated.
- the prefabricated mixing inserts 10, 12 are rotated by 90 ° against each other in their longitudinal axis m strung together. Subsequently, the heat exchanger tubes 16 are pushed parallel to the longitudinal axis m through the openings 20 of the web plates 18 A, 18 B therethrough.
- Two diametrically opposite fixing rods 26 - these may also be formed by heat exchanger tubes 16 - are soldered or welded points on the web plates 18 A, 18 B attached and used to fix the mixing inserts 12, 14, so that they by appropriate actuation of the fixing rods 26 together in the flow channel longitudinal axis x back and forth are displaced.
- the two fixing rods 26 are connected at one end via a crossbar 28. On the crossbar 28 centrally centrally arranged in the flow channel longitudinal axis x actuating rod 30 is fixed.
- the insert thus manufactured is inserted from one side of the mixer-heat exchanger 40 in the flow channel 22, wherein the actuating rod 30 is led out on the other side via a fluid-tight passage 32 in an end wall 34 of the mixer-heat exchanger 40 from this.
- the heat exchanger tubes 16 are open at one end and closed at the other end via a bottom 17.
- the heat exchange medium is here via one in each heat exchanger tube 16 used lance 36 whose free end is led to just before the closed bottom 17 of the heat exchanger tube 16, via a flanged on an end face of the mixer-heat exchanger 40 inlet pipe stub 42 via a gap 43 at the same time introduced lances 36 and flows back after exiting the lances 36 at the bottom 17 of each heat exchanger tube 16 within the lance 34 and inner wall of each heat exchanger tube 16 in the opposite direction, exits from the open ends of the heat exchanger tubes 16 in a second space 44 and leaves the mixer-heat exchanger 40 via a preferably laterally on the intermediate space 44 arranged outlet pipe 46.
- the outlet pipe socket 46 may also be arranged centrally.
- the mixture to be mixed in the mixer heat exchanger 40 and / or brought to a reaction mixture is introduced via a laterally arranged on the mixer heat exchanger 40 inlet pipe socket 48 and flows through the flow channel 22 on the web plates 18 A, 18 B of the mixing inserts 10, 12 passing the Heat exchanger tubes 16 along the d the inlet pipe stub 48 remote end wall 34 of the mixer-heat exchanger 40 and exits there through a laterally arranged outlet pipe stub 50 as a reaction product from the mixer heat exchanger 40.
- a corresponding volume part is provided as a deflecting 38.
- the ends of the lances 36 with the inlet openings for the heat exchange medium are fluid-tightly inserted into a common bottom plate 52, which is sealed by a seal 53 against the second gap 44.
- the heat exchanger tubes 16 are fluid tightly inserted at their open ends into a common end plate 56 defining the gap.
- the mixing inserts 10, 12 which are connected to one another via the fixing rods 26 are moved back and forth by means of the actuating rod 40 from time to time.
- the heat exchanger tubes 16 over the edge of their openings 20 practically form-fitting enclosing web plates 18 A, 18 B pulled over the surface of the heat exchanger tubes 40 and pushed.
- the deposits are mechanically removed from the pipe surfaces. This process can be done without disassembly of the mixer-heat exchanger 40 and in most cases, even without interruption to be performed manually or automatically.
- Fig. 4 schematically shows an arrangement with two parallel mixer heat exchangers 40 a, 40 b.
- the mixture of substances to be treated is supplied to the individual mixer heat exchangers 40 a, 40 b via a central supply line 56 and via branching off of these distribution lines 58 a, 58 b.
- a valve 60 a, 60 b for individually opening and closing the manifolds 58 a, 58 b provided.
- Temperature sensors T at the output of each mixer heat exchanger 40 a, 40 b the temperature of the reaction product is measured continuously. With increasing deposits on the heat exchanger tubes 16, the temperature of the reaction product changes, so that the exceeding or falling below a predetermined temperature limit for the output of a signal or directly used for the automatic triggering of the cleaning process can.
- the outlet lines 62 a, 62 b of the individual mixer heat exchangers 60 a, 60 b are combined to form a central drain line 64 for the reaction product.
- a mixer 66 is connected to compensate for different temperatures.
- the device shown is merely illustrative and is not limited to two parallel mixer heat exchangers 40 a, 40 b. Depending on the desired capacity or frequency of the cleaning intervals, a device with three and more parallel mixer heat exchangers may be displayed.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Die Erfindung betrifft einen Mischer-Wärmetauscher zum Heizen und Kühlen von fliessfähigen Stoffen, mit in einem Strömungskanal in einer Längsachse angeordneten Wärmetauscherrohren und statischen Mischelementen, wobei die Wärmetauscherrohre die Mischelemente im wesentlichen formschlüssig über Öffnungen durchsetzen.The invention relates to a mixer heat exchanger for heating and cooling of flowable materials, arranged in a flow channel in a longitudinal axis of heat exchanger tubes and static mixing elements, wherein the heat exchanger tubes pass through the mixing elements substantially form-fitting openings.
Wärmeaustauschvorrichtungen sind in vielen Ausführungen bekannt und in der Industrie verbreitet. In den meisten Wärmeaustauschern herrschen turbulente Strömungsverhältnisse.Heat exchange devices are known in many designs and common in the industry. Most heat exchangers have turbulent flow conditions.
Bekannte Wärmetauscher sind Rohrbündelwärmetauscher, die innen zusätzlich mit statischen Mischelementen ausgerüstet sind, um den Wärmeübergang an der Rohrwand zusätzlich zu verbessern.Known heat exchangers are tube bundle heat exchangers which are additionally equipped with static mixing elements on the inside in order to additionally improve the heat transfer at the tube wall.
Dank statischen Mischer-Wärmetauschern können viskose Flüssigkeiten mit Grundoperationen wie Mischen, Wärme- und Stoffaustausch oder in der chemischen Reaktionstechnik kontinuierlich verarbeitet werden. Das hohe Wärmeübertragungsvermögen von statischen Mischer-Wärmetauschern sowie die ausgezeichnete Mischleistung im laminaren Strömungsbereich erlauben den Einsatz als Wärmetauscher oder Reaktor.Thanks to static mixer heat exchangers, viscous liquids can be continuously processed with basic operations such as mixing, heat and mass transfer or chemical reaction technology. The high heat transfer capacity of static mixer heat exchangers and the excellent mixing performance in the laminar flow range allow use as a heat exchanger or reactor.
Aufgrund der erzielten, sehr hohen Nusselt-Zahl sowie der grossen Oberfläche durch den Rohrbündel besitzt der Mischer-Wärmetauscher ein ausgezeichnetes volumenbezogenes Wärmeübertragungsvermögen. Eine weitere besondere Fähigkeit des Mischer-Wärmetauschers ist das Einstellen eines perfekten Temperaturprofils beim Austritt aus dem Wärmetauscher, selbst bei Flüssigkeiten mit einer Viskosität >1'000'000 mPas. Die Ursache liegt in der sehr hohen Mischleistung, die die Mischleistung herkömmlicher Wärmetauscher weit übertrifft.Due to the achieved, very high Nusselt number and the large surface through the tube bundle, the mixer heat exchanger has an excellent volume-related heat transfer capacity. Another special feature of the mixer heat exchanger is the setting of a perfect temperature profile when exiting the heat exchanger, even for liquids with a viscosity>1'000'000 mPas. The reason lies in the very high mixing performance, which far exceeds the mixing performance of conventional heat exchangers.
Mischer-Wärmetauscher werden unter anderem für folgende Anwendungen eingesetzt:
- Heizen und Kühlen im laminaren Strömungsbereich.
- Heizen und Kühlen von Ölen bei grösseren Betriebsdrücken.
- Zur Verarbeitung und Herstellung von Klebstoffen und Harzen.
- Kühlen von Schmelzen für die Chemiefaserindustrie.
- Zur Temperierung von Polyol und Isocyanat.
- Zur Temperaturüberwachung von Kunststoffschmelzen und Kunststoffschäumen.
- Zur Herstellung von Nahrungsmittel, hauptsächlich aus der Süsswaren- und Milch verarbeitenden Industrie.
- Zur externen Kühlung von gerührten Tankreaktoren.
- Zur kontinuierlichen Reaktionsführung.
- Heating and cooling in the laminar flow range.
- Heating and cooling of oils at higher operating pressures.
- For processing and manufacturing adhesives and resins.
- Cooling of melts for the chemical fiber industry.
- For temperature control of polyol and isocyanate.
- For temperature monitoring of plastic melts and plastic foams.
- For the production of foodstuffs, mainly from the confectionery and milk processing industry.
- For external cooling of stirred tank reactors.
- For continuous reaction.
Es ist bekannt, dass sich Stoffe unter dem Einfluss der Temperatur oder während der Verweilzeit im Mischer-Wärmetauscher verändern können. Die sich verändernden Stoffe können zu Ablagerungen in Form einer dünnen Schicht an den Wärmetauscherrohren führen. Derartige, auch unter dem Begriff "Fouling" bekannte Ablagerungen kann ein statischer Mischer-Wärmetauscher nur ungenügend selbst entfernen. Die Erhöhung der Deformationsgeschwindigkeit durch kurzzeitig Erhöhung der Durchflussgeschwindigkeit reicht oft nicht aus, da die Deformationsgeschwindigkeit infolge steigenden Druckverlustes nicht beliebig erhöht werden kann. In vielen Anwendungsfällen ist es daher unumgänglich, den Mischer-Wärmetauscher von Zeit zu Zeit zu demontieren und das Fouling an den Wärmetauscherrohren zu entfernen, wodurch das Wärmeübertragungsvermögen wieder verbessert wird.It is known that substances can change under the influence of temperature or during the residence time in the mixer-heat exchanger. The changing substances can lead to deposits in the form of a thin layer on the heat exchanger tubes. Such deposits, also known as "fouling", can only insufficiently remove a static mixer heat exchanger itself. The increase in the deformation rate by briefly increasing the flow rate is often not sufficient because the deformation rate can not be increased as desired due to increasing pressure loss. In many applications, it is therefore essential dismantle the mixer-heat exchanger from time to time and remove the fouling on the heat exchanger tubes, thereby again improving the heat transfer capacity.
Der Erfindung liegt die Aufgabe zugrunde, einen Mischer-Wärmetauscher der eingangs genannten Art zu schaffen, bei dem Ablagerungen an der Oberfläche der Wärmetauscherrohre auf einfache Weise ohne Demontage der Wärmeaustauschvorrichtung mechanisch entfernt werden können.The invention has for its object to provide a mixer-heat exchanger of the type mentioned in the deposits on the surface of the heat exchanger tubes can be removed mechanically without disassembly of the heat exchange device in a simple manner.
Zur erfindungsgemässen Lösung der Aufgabe führt, dass die Wärmetauscherrohre und die Mischelemente zur Erzeugung einer schabenden Bewegung an der Oberfläche der Wärmetauscherrohre relativ zueinander in der Längsachse verschiebbar sind.To the inventive solution of the problem results in that the heat exchanger tubes and the mixing elements for generating a scraping motion on the surface of the heat exchanger tubes are displaceable relative to each other in the longitudinal axis.
Der Mischer-Wärmetauscher umfasst mindestens je ein Wärmetauscherrohr und ein Mischelement. Die Mischelemente sind beispielsweise paarweise gekreuzte Stegplatten.The mixer heat exchanger comprises at least one heat exchanger tube and a mixing element. The mixing elements are for example pairs of crossed web plates.
Bei einer bevorzugten Ausführungsform sind die Mischelemente über eine gemeinsame Betätigungsstange in der Längsachse des Strömungskanals hin und her bewegbar sind.In a preferred embodiment, the mixing elements are movable back and forth via a common actuating rod in the longitudinal axis of the flow channel.
Zweckmässig sind die Wärmetauscherrohre einseitig geschlossen, wobei in die Wärmetauscherrohre einragende Lanzen für ein Wärmetauschermedium vorgesehen sind. Die Wärmetauscherrohre können aber auch U-förmig zum Rohranfang zurückgeführt werden; in diesem Fall sind keine Lanzen erforderlich.Suitably, the heat exchanger tubes are closed on one side, wherein in the heat exchanger tubes protruding lances are provided for a heat exchange medium. However, the heat exchanger tubes can also be returned in a U-shape to the beginning of the tube; in this case, no lances are required.
Zur Erzeugung der reinigenden Schabwirkung können auf die Wärmetauscherrohre zusätzlich gleitfähige Reinigungskörper aufgesetzt sein.To produce the cleaning scraping effect, slidable cleaning bodies can additionally be placed on the heat exchanger tubes.
Anstelle der Mischelemente können auch die Wärmetauscherrohre in der Längsachse des Strömungskanals hin und her bewegbar sein.Instead of the mixing elements and the heat exchanger tubes in the longitudinal axis of the flow channel can be moved back and forth.
Die Mischelemente können aber auch durch Änderung der Strömungsrichtung in der Längsachse des Strömungskanals hin und her bewegbar sein.But the mixing elements can also be moved back and forth by changing the flow direction in the longitudinal axis of the flow channel.
Eine Einrichtung zum Heizen und Kühlen von fliessfähigen Stoffen kann auch eine Vielzahl parallel geschalteter Mischer-Wärmetauscher umfassen.A device for heating and cooling flowable materials may also comprise a multiplicity of parallel mixer heat exchangers.
Weitere Vorteile, Merkmale und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels sowie anhand der Zeichnung; diese zeigt in
- Fig. 1
- eine Schrägsicht auf ein Rohrbündel mit aufgesteckten Mischeinsätzen eines Rohrbündelwärmetauschers;
- Fig. 2
- einen Längsschnitt durch einen erfindungsgemässen MischerWärmetauscher;
- Fig. 3
- ein Detail von
Fig. 2 in vergrösserter Darstellung; - Fig. 4
- eine Prinzipskizze einer Anordnung mit parallel geschalteten, erfindungsgemässen Mischer-Wärmetauschern.
- Fig. 1
- an oblique view of a tube bundle with plugged mixing inserts a tube bundle heat exchanger;
- Fig. 2
- a longitudinal section through a mixer according to the invention heat exchanger;
- Fig. 3
- a detail of
Fig. 2 in an enlarged view; - Fig. 4
- a schematic diagram of an arrangement with parallel, inventive mixer-heat exchangers.
Vier in
Aus
Zur Erzeugung der reinigenden Schabwirkung können, zusätzlich zu den Stegplatten 18 A, 18 B, mit einer entsprechenden Öffnung versehene, gleitfähige Plättchen als Reinigungskörper auf die Wärmetauscherrohre 16 aufgesetzt werden.To produce the cleaning scraping action, in addition to the web plates 18 A, 18 B, provided with a corresponding opening, slidable plates can be placed as a cleaning body on the
Sämtliche Stegplatten 18 A, 18 B erstrecken sich innerhalb jedes Mischeinsatzes 10, 12 über jeweils ihre durch die Stirnseiten der Mischeinsätze 10, 12 und durch die Innenmantelfläche 24 des Strömungskanals 22 begrenzte, maximal mögliche Länge, wobei die Kontur der Stegplatten 18 A, 18 B dem kreisförmigen Querschnitt des Strömungskanals 22 so angepasst ist, dass die Stegplatten 18 A, 18 B mit kleinem Spiel an die Innenmantelfläche 24 des Strömungskanals 22 angrenzen.All web plates 18 A, 18 B extend within each mixing
Die Wärmetauscherrohre 16 durchsetzen die Stegplatten 18 A, 18 B über in diesen angeordnete Öffnungen 20, die entsprechend dem Winkel zwischen Stegplatte 18 A, 18 B und Wärmetauscherrohr 16 eine elliptische Randbegrenzung aufweisen. Die Stegplatten 18 A, 18 B sind an ihren Kreuzungsstellen mindestens teilweise über Löt- oder Schweissstellen miteinander verbunden.The
Beim Zusammenbau des Mischer-Wärmetauschers 40 werden die einzelnen Mischeinsätze 10, 12 durch die gekreuzte Anordnung der entsprechenden Anzahl von Stegplatten 18 A, 18 B vorgefertigt. Die vorgefertigten Mischeinsätze 10, 12 werden um 90° gegeneinander verdreht in ihrer Längsachse m aneinandergereiht. Anschliessend werden die Wärmetauscherrohre 16 parallel zur Längsachse m durch die Öffnungen 20 der Stegplatten 18 A, 18 B hindurch geschoben. Zwei einander diametral gegenüberliegende Fixierstangen 26 -- diese können auch durch Wärmetauscherrohre 16 gebildet sein -- sind über Löt- oder Schweissstellen an den Stegplatten 18 A, 18 B befestigt und dienen zur Fixierung der Mischeinsätze 12, 14, damit diese durch entsprechende Betätigung der Fixierstangen 26 gemeinsam in der Strömungskanallängsachse x hin und her verschiebbar sind. Die beiden Fixierstangen 26 sind an einem Ende über eine Querstange 28 verbunden. An der Querstange 28 ist mittig eine zentral in der Strömungskanallängsachse x angeordnete Betätigungsstange 30 festgelegt. Das so gefertigte Einsatzteil wird von einer Seite des Mischer-Wärmetauschers 40 in den Strömungskanal 22 eingeschoben, wobei die Betätigungsstange 30 auf der anderen Seite über eine fluiddichte Durchführung 32 in einer Stirnwand 34 des Mischer-Wärmetauschers 40 aus diesem herausgeführt wird.When assembling the mixer-
Wie aus
Das im Mischer-Wärmetauscher 40 zu mischende und oder zu einer Reaktion zu bringende Stoffgemisch wird über einen seitlich am Mischer-Wärmetauscher 40 angeordneten Einlassrohrstutzen 48 eingeleitet und fliesst durch den Strömungskanals 22 an den Stegplatten 18 A, 18 B der Mischeinsätze 10, 12 vorbei den Wärmetauscherrohren 16 entlang zu der d dem Einlassrohrstutzen 48 entfernt liegenden Stirnwand 34 des Mischer-Wärmetauschers 40 und tritt dort durch einen seitlich angeordneten Auslassrohrstutzen 50 als Reaktionsprodukt aus dem Mischer-Wärmetauscher 40 aus. Zur besseren Strömungslenkung vom Einlassrohrstutzen 48 in den Strömungskanal 22 und zur Vermeidung eines Totvolumens ist gegenüber dem Einlassstutzen 48 ein entsprechendes Volumenteil als Umlenkteil 38 vorgesehen.The mixture to be mixed in the
Die Enden der Lanzen 36 mit den Einlassöffnungen für das Wärmetauschermedium sind fluiddicht in eine gemeinsame Bodenplatte 52 eingesetzt, welche mittels einer Dichtung 53 gegen den zweiten Zwischenraum 44 abgedichtet ist. In gleicher Weise sind die Wärmetauscherrohre 16 an ihren offenen Enden fluiddicht in eine gemeinsame, den Zwischenraum begrenzende Endplatte 56 eingesetzt.The ends of the
Zum Entfernen von beispielsweise Zersetzungsprodukten, die an der äusseren Oberfläche der Wärmetauscherrohre 16 anhaftende Ablagerungen bilden, werden von Zeit zu Zeit die über die Fixierstangen 26 miteinander verbundenen Mischeinsätze 10, 12 mittels der Betätigungsstange 40 hin und her bewegt. Hierbei werden die die Wärmetauscherrohre 16 über den Rand ihrer Öffnungen 20 praktisch formschlüssig umschliessenden Stegplatten 18 A, 18 B über die Oberfläche der Wärmetauscherrohre 40 gezogen und gestossen. Durch die bei diesem Hin und Herschieben der Mischeinsätze 10, 12 eintretende schabende Bewegung der Öffnungsränder der Öffnungen 20 in den Stegplatten 18 A, 18 B werden die Ablagerungen mechanisch von den Rohroberflächen entfernt. Dieser Vorgang kann ohne Demontage des Mischer-Wärmetauschers 40 erfolgen und in den meisten Fällen sogar ohne Betriebsunterbrechung manuell oder automatisch durchgeführt werden.To remove, for example, decomposition products which form deposits adhering to the outer surface of the
Es sei hier noch erwähnt, dass für die Hin- und Herbewegung der Mischeinsätze 10, 12 grundsätzlich keine mechanischen Hilfsmittel wie Fixier- und Betätigungsstangen erforderlich sind. Die Bewegung kann auch allein durch den Druckverlust bzw. eine kurzzeitige Umkehr der Fliessrichtung erfolgen.It should be mentioned here that in principle no mechanical aids such as fixing and operating rods are required for the reciprocating movement of the mixing inserts 10, 12. The movement can also be effected solely by the pressure loss or a brief reversal of the flow direction.
Damit eine Reinigung ohne Betriebsstörungen vorgenommen werden kann, wird beispielsweise jeweils nur ein Mischer-Wärmetauscher 40 a, 40 b nach vorgängigem Schliessen des entsprechenden Ventils 60 a, 60 b gereinigt.So that a cleaning can be made without malfunction, for example, only one mixer-heat exchanger 40 a, 40 b after previous closure of the corresponding valve 60 a, 60 b cleaned.
Die Austrittsleitungen 62 a, 62 b der einzelnen Mischer-Wärmetauscher 60 a, 60 b sind zu einer zentralen Abflussleitung 64 für das Reaktionsprodukt zusammengeführt. In die zentrale Abflussleitung 64 ist ein Mischer 66 zum Ausgleich unterschiedlicher Temperaturen geschaltet . Eine Temperaturkontrolle des Reaktionsproduktes nach dem Durchlaufen des Mischers 66 erfolgt über einen weiteren Temperatursensor T.The outlet lines 62 a, 62 b of the individual mixer heat exchangers 60 a, 60 b are combined to form a
Die im Beispiel von
- 1010
- Mischeinsatzmixed use
- 1212
- Mischeinsatz, 90° gedrehtMixing insert, turned 90 °
- 1414
- Rohrbündeltube bundle
- 1616
- WärmetauscherrohreHeat exchanger tubes
- 1717
- Bodenground
- 18 A, B18 A, B
- Stegplattenwall sheets
- 2020
- Öffnungenopenings
- 2222
- Strömungskanalflow channel
- 2424
- InnenmantelflächeInner surface area
- 2626
- Fixierstangenfixing bars
- 2828
- Querstangecrossbar
- 3030
- Betätigungsstangeactuating rod
- 3232
- Durchführungexecution
- 3434
- Stirnwandbulkhead
- 3636
- Lanzenlances
- 3838
- Umlenkteildeflecting
- 40, 40 a, b40, 40 a, b
- Mischer-WärmetauscherMixer-heat exchanger
- 4242
- EinlassrohrstutzenInlet pipe connection
- 4343
- erster Zwischenraumfirst gap
- 4444
- zweiter Zwischenraumsecond space
- 4646
- Auslassrohrstutzenoutlet connector
- 4848
- EinlassrohrstutzenInlet pipe connection
- 5050
- Auslassrohrstutzenoutlet connector
- 5252
- Bodenplattebaseplate
- 5353
- Dichtungpoetry
- 5454
- Endplatteendplate
- 5656
- Zuführleitungfeed
- 58 a, b58 a, b
- Verteilerleitungendistribution lines
- 60 a, b60 a, b
- Ventilevalves
- 62 a, b62 a, b
- Austrittsleitungenoutlet lines
- 6464
- Abflussleitungdrain line
- 6666
- Mischermixer
- LL
- Länge von 10, 12Length of 10, 12
- TT
- Temperatursensortemperature sensor
- aa
- Zwischenabstand (Stegabstand)Intermediate distance (distance between bars)
- mm
- Längsachse von 10, 12Longitudinal axis of 10, 12
- xx
- Längsachse von 22Longitudinal axis of 22
Claims (9)
dadurch gekennzeichnet, dass
die Wärmetauscherrohre (16) und die Mischelemente (18) zur Erzeugung einer schabenden Bewegung an der Oberfläche der Wärmetauscherrohre (16) relativ zueinander in der Längsachse (x) verschiebbar sind.Mixer heat exchanger for heating and cooling of flowable materials, with in a flow channel (22) in a longitudinal axis (x) arranged heat exchanger tubes (16) and static mixing elements (18), wherein the heat exchanger tubes (16) the mixing elements (18) substantially positive fit pass through openings (20),
characterized in that
the heat exchanger tubes (16) and the mixing elements (18) for generating a scraping movement on the surface of the heat exchanger tubes (16) relative to each other in the longitudinal axis (x) are displaceable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08405121A EP2113732A1 (en) | 2008-04-30 | 2008-04-30 | Mixer-heat exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08405121A EP2113732A1 (en) | 2008-04-30 | 2008-04-30 | Mixer-heat exchanger |
Publications (1)
Publication Number | Publication Date |
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EP2113732A1 true EP2113732A1 (en) | 2009-11-04 |
Family
ID=39712170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08405121A Withdrawn EP2113732A1 (en) | 2008-04-30 | 2008-04-30 | Mixer-heat exchanger |
Country Status (1)
Country | Link |
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EP (1) | EP2113732A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013037770A1 (en) | 2011-09-15 | 2013-03-21 | Bayer Intellectual Property Gmbh | Method for the continuous production of water-dispersible vinyl polymers |
EP2629039A1 (en) | 2012-02-17 | 2013-08-21 | Armacell Enterprise GmbH | Extensional flow heat exchanger for polymer melts |
EP2796195A1 (en) * | 2013-04-22 | 2014-10-29 | Fluitec Invest AG | Continuous tubular reactor |
EP2881154A1 (en) * | 2013-12-04 | 2015-06-10 | Fluitec Invest AG | Method and device for flash evaporation |
EP3081285A1 (en) | 2015-04-16 | 2016-10-19 | Fluitec Invest AG | Static mixing device for flowing materials |
DE102015113501A1 (en) * | 2015-08-14 | 2017-02-16 | Falk + Thomas Engineering GmbH | Heat exchangers |
EP3620230A1 (en) | 2018-09-07 | 2020-03-11 | Fluitec Invest AG | Device of a chemical reactor and a method |
CN111375323A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Baffle type foaming device |
EP3800418A1 (en) * | 2019-10-01 | 2021-04-07 | BITZER Kühlmaschinenbau GmbH | Heat exchanger, refrigerating or heating system with such a heat exchanger |
EP3932531A1 (en) | 2020-07-02 | 2022-01-05 | Fluitec Invest AG | Continuous reaction calorimeter |
WO2022032401A1 (en) * | 2020-08-14 | 2022-02-17 | Sulzer Management Ag | Apparatus for supplying or dissipating heat, for carrying out reactions and for mixing and dispersing flowing media |
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DE612866C (en) * | 1930-07-27 | 1935-05-07 | F Soltau Dipl Ing | Scraper device for evaporator |
GB714926A (en) * | 1951-05-10 | 1954-09-08 | Swinney Brothers Ltd | Improvements in or relating to heat exchangers |
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2008
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FR450532A (en) * | 1912-10-25 | 1913-03-27 | Joseph William Hardy | Removable and removable support for fixing the tube cleaning scrapers of fuel savers and steam superheaters |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013037770A1 (en) | 2011-09-15 | 2013-03-21 | Bayer Intellectual Property Gmbh | Method for the continuous production of water-dispersible vinyl polymers |
EP2629039A1 (en) | 2012-02-17 | 2013-08-21 | Armacell Enterprise GmbH | Extensional flow heat exchanger for polymer melts |
EP2796195A1 (en) * | 2013-04-22 | 2014-10-29 | Fluitec Invest AG | Continuous tubular reactor |
EP2881154A1 (en) * | 2013-12-04 | 2015-06-10 | Fluitec Invest AG | Method and device for flash evaporation |
EP3081285A1 (en) | 2015-04-16 | 2016-10-19 | Fluitec Invest AG | Static mixing device for flowing materials |
DE102015113501A1 (en) * | 2015-08-14 | 2017-02-16 | Falk + Thomas Engineering GmbH | Heat exchangers |
EP3620230A1 (en) | 2018-09-07 | 2020-03-11 | Fluitec Invest AG | Device of a chemical reactor and a method |
CN111375323A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Baffle type foaming device |
CN111375323B (en) * | 2018-12-28 | 2022-02-25 | 中国石油天然气股份有限公司 | Baffle type foaming device |
EP3800418A1 (en) * | 2019-10-01 | 2021-04-07 | BITZER Kühlmaschinenbau GmbH | Heat exchanger, refrigerating or heating system with such a heat exchanger |
EP3932531A1 (en) | 2020-07-02 | 2022-01-05 | Fluitec Invest AG | Continuous reaction calorimeter |
WO2022032401A1 (en) * | 2020-08-14 | 2022-02-17 | Sulzer Management Ag | Apparatus for supplying or dissipating heat, for carrying out reactions and for mixing and dispersing flowing media |
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