EP1466135B1 - Scraped surface heat exchanger - Google Patents

Scraped surface heat exchanger Download PDF

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Publication number
EP1466135B1
EP1466135B1 EP03700003A EP03700003A EP1466135B1 EP 1466135 B1 EP1466135 B1 EP 1466135B1 EP 03700003 A EP03700003 A EP 03700003A EP 03700003 A EP03700003 A EP 03700003A EP 1466135 B1 EP1466135 B1 EP 1466135B1
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EP
European Patent Office
Prior art keywords
heat exchanger
housing
scraped surface
surface heat
exchanger 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.)
Expired - Lifetime
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EP03700003A
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German (de)
French (fr)
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EP1466135A1 (en
Inventor
Felix BÜRGEL
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STIFTUNGS- BERATER AG
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Stiftungs- Berater AG
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Publication of EP1466135A1 publication Critical patent/EP1466135A1/en
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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

Definitions

  • the invention relates to a scraped heat exchanger according to the Preamble of the independent claim.
  • Scraper heat exchangers are known, for example, from WO-A-98/54530 and from DE-A-25 49 600 known.
  • the scraped surface heat exchanger from DE-A-25 49 600 has a housing with jacket spaces through which a heat exchange medium flows. Between Heat exchange surfaces of the shell spaces is a product space defined, by which a temperature to be tempered (to be cooled or flowable material to be heated flows.
  • One Scraper protrudes into this product space and is from a motor drive driven by rotation. there It may touch the heat exchange surfaces Anlagerndes Good (for example, good, which is fixed by cooling has become and attached to the heat exchange surfaces) from the heat exchange surfaces.
  • the inventive scraped heat exchanger is the Housing bell-shaped with his coat spaces.
  • the motor drive is at least partially in the interior received the bell-shaped housing added.
  • the housing includes a separate inner housing part and a via this inner housing part überstülpbares separate outer housing part, the between to enclose the product space.
  • the so designed Housing can be easily disassembled and cleaned well, and the success of the cleaning process can (with disassembled Housing) also subjected to a simple visual inspection become.
  • the dimensions of the product space and the dimensions of the wiper in the substantially axial portion of the bell-shaped housing so dimensioned that the product space forms an annular gap into which the Scraper protrudes.
  • the narrow annular gap trained product space in which in the operation of Scraper rotates as a result, due to the geometric dimensions of the annular gap, in the axial part the bell-shaped housing no thicker layers in the Annular gap can form, so that in the material to be tempered in the axial part of the housing always a high Temperature gradient occurs. As a result of this high Temperature gradient becomes a particularly efficient Temperature control of the estate achieved.
  • the scraper in a further embodiment of the inventive Schabffyleyers the scraper includes a hub, from which spring from several arms, those with scrapers are provided.
  • the hub of the scraper is on a with attached to the motor drive shaft connected and juts into one at the top of the bell-shaped Housing provided outlet in it. In these The product space also opens into the connection piece.
  • This embodiment of the scraped heat exchanger is of the constructive side ago particularly advantageous.
  • the inventive Schabffyleyers can in the lower end of the Product room an inlet for the material to be tempered and on Outlet of bell-shaped housing an outlet for the tempered Good be provided.
  • the scraping of the Scrapers are designed and arranged so that in operation the gutter from the inlet spiral through the Product room flows towards the outlet. This causes a particularly efficient cooling or heating of the material.
  • the motor drive Planetary gear with a hollow shaft, which the Drive shaft on which the hub is mounted, receives, so that the planetary gear on the motor drive power the drive shaft converts.
  • the Drive shaft easy to install and over the Planetary gear can, if desired, a Translation / reduction made.
  • the inventive Schabffyleyers has the drive shaft in the one Area in which the hub is fixed, a polygon outer contour on, and the hub a corresponding one Inner contour.
  • the hub is on after its attachment the drive shaft relative to the drive shaft fixed position.
  • the housing is detachable with a separate frame connected, which height adjustable feet having.
  • This embodiment has the advantage that the Housing separately removable from the frame (and thereby, for example Easier to disassemble and clean, see also Design with inner and outer housing part on above), on the other hand, by the height-adjustable feet on the frame a good adjustment of Schabebenleyers in total, regardless of how, e.g. the Surface is on which the frame stands.
  • a further embodiment of the a scraped heat exchanger according to the invention Frequency converter for controlling the speed of the motor Drive. This embodiment allows a special simple and reliable control of the speed of the motor drive.
  • FIG. 1 and FIG Scraper heat exchanger 1 comprises a bell-shaped housing 2 with two separate housing parts, an inner housing part 20 and one on the inner Housing part überstülpbaren outer housing part 21.
  • a jacket space 200 or 210 is provided in the inner housing part 20 and in the outer housing part in each case.
  • At the bottom End region of the shell spaces 200 and 210 is one each Inlet and in the upper end of the Mantelippo one each Outlet intended for a heat exchange medium (only the Inlet 211 and the outlet 212 of the outer housing part 21st can be seen), which in operation through the jacket spaces is pumped, for example, a coolant (or im Case of a desired heating a heating fluid).
  • the inner shell space 200 is from a heat exchange surface 200a and the outer shell space of a heat exchange surface 210a limited.
  • the heat exchange surfaces 200a of the inner Housing part 20 and 210 a of the outer housing part 21st define between them a product space 3, in which a scraper 4 protrudes into it.
  • the two housing parts 20 and 21 are provided by a quick-release 23 Clamping ring 22 held together.
  • the product space 3 has - similar to the housing 2 - a bell-shaped and forms in the axial part 24 of the bell-shaped housing 2 an annular gap, wherein at the axial part 24 is an approximately horizontally extending part 25th the bell-shaped housing 2 connects.
  • An inlet 30 for the material to be tempered is in the lower end of the Product space 3 provided while at the upper end of the bell-shaped housing an outlet 31 for the Well tempered is provided.
  • the scraper 4 comprises a hub 40, from which several Arms 41 - four in the illustrated embodiment Arms - spring up here as double struts 410,411 are formed.
  • the double struts 410,411 enclose a gap 412 between them, in which Schabiata 42 are used.
  • Schabemia 42 are used.
  • Another strut 43 is for this purpose in provided near the hub region of the arms 41.
  • the scraping elements 42 are facing outwards projecting protrusions 420 as well as inward protruding projections 421 (the inward projecting projections 421 face outward considers wells).
  • this Projections 420 and recesses 421 may be in the gap 412 inserted scraping elements 42 in operation - ie at Rotating scraper 4 - a spiral flow of the in the lower end region through the inlet 30 supplied to tempering Guts are generated, which is an efficient Cooling or heating of the estate allows.
  • outwardly and inwardly projecting protrusions 420 and 421 may be on the heat exchange surfaces 200a 210a Anlagerndes from these surfaces from what a Reduction of the efficiency of heat transfer counteracts and thus the efficiency of the heat exchanger 1 increases.
  • the hub 40 of the scraper 4 is on a drive shaft. 5 arranged, which is performed by a sealing element 6 is.
  • a sealing element 6 is.
  • the hub 40 is on the drive shaft 5 is fixed and protrudes into the outlet 31 of the bell-shaped housing 2 inside.
  • the drive shaft 5 has in the area in which the hub 40th is attached, a polygon outer contour on, and the hub 40 has a corresponding inner contour.
  • a receptacle 201 for a Seal assembly 50 is formed so that the Seal assembly 50 mounted in a simple manner centered can be what the assembly and disassembly process facilitates and in particular no screwing the Sealing arrangement 50 requires.
  • a motor drive 8 For driving the drive shaft 5 and thus for Rotational driving of the scraper 4 is a motor drive 8 is provided, which has a motor 80 as well in the embodiment shown here Planetary gear 81 has.
  • the planetary gear 81 can thereby comprise a hollow shaft, which the drive shaft. 5 receives, so that the planetary gear 81, the motor Driving force on the drive shaft 5 converts.
  • the Drive shaft 5 can be mounted in a simple manner or dismantle.
  • the speed of the motor 80 can for example by a frequency converter (not shown) are particularly easy to control.
  • the motor drive 8 is in one suspended separate frame 9, with which the housing. 2 fixed, but releasably connected, so it for example can be easily removed from the rack for disassembly.
  • the housing 2 is for this purpose attached to a housing part, e.g. on the inner housing part 20, provided with eyelets 202, which can be screwed to the frame 9.
  • the frame 9 is here designed as a tripod, with height-adjustable feet 90 to compensate for unevenness of the surface on which the Heat exchanger 1 should be set up.
  • the housing 2 can be disassembled by the over the inner housing part 21 pushed over the outer housing part 20 is subtracted.
  • the motor drive 8 at least partially, in the illustrated embodiment even almost completely, in the interior of the bell-shaped Housing 2 added, which is a particularly compact and space-saving design of the inventive Schabebenleyers 1 result and due to the bell-shaped housing 2 is possible.
  • material to be tempered is passed through the inlet 30 pumped into the lower end of the product space 3.
  • the im Product space 3 between the heat exchange surfaces 200a and 210a rotating scraper 4 causes in the narrow annular gap a spiral flow of the material to be tempered, which is thus tempered in an efficient manner.
  • a Stopping the rotating scraper 4 or by a fast braking (rapid change of Rotation speed) can, if desired, a Mixing of the estate can be achieved.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Die Erfindung betrifft einen Schabwärmetauscher gemäss dem Oberbegriff des unabhängigen Patentanspruchs.The invention relates to a scraped heat exchanger according to the Preamble of the independent claim.

Schabwärmetauscher sind beispielsweise aus der WO-A-98/54530 und aus der DE-A-25 49 600 bekannt. Der Schabwärmetauscher aus der DE-A- 25 49 600 weist ein Gehäuse mit Mantelräumen auf, durch die ein Wärmetauschmedium strömt. Zwischen den Wärmetauschflächen der Mantelräume ist ein Produktraum definiert, durch welchen ein zu temperierendes (zu kühlendes oder zu erwärmendes) fliessfähiges Gut strömt. Ein Abstreifer ragt in diesen Produktraum hinein und wird von einem motorischen Antrieb rotatorisch angetrieben. Dabei streift er eventuell an den Wärmetauschflächen sich anlagerndes Gut (z.B. Gut, welches durch Kühlung fest geworden ist und sich an den Wärmetauschflächen anlagert) von den Wärmetauschflächen ab. Dies ist für die Effizienz des Wärmetauschers von Bedeutung, weil an den Wänden angelagertes Gut den an den Wärmetauschflächen stattfindenden Wärmeübergang zwischen dem zu temperierenden Gut und den Wärmetauschflächen verschlechtert. Der motorische Antrieb des Abstreifers ist ausserhalb des Gehäuses angeordnet, was einen vergleichsweise grossen Platzbedarf für den Wärmetauscher voraussetzt.Scraper heat exchangers are known, for example, from WO-A-98/54530 and from DE-A-25 49 600 known. The scraped surface heat exchanger from DE-A-25 49 600 has a housing with jacket spaces through which a heat exchange medium flows. Between Heat exchange surfaces of the shell spaces is a product space defined, by which a temperature to be tempered (to be cooled or flowable material to be heated flows. One Scraper protrudes into this product space and is from a motor drive driven by rotation. there It may touch the heat exchange surfaces Anlagerndes Good (for example, good, which is fixed by cooling has become and attached to the heat exchange surfaces) from the heat exchange surfaces. This is for efficiency the heat exchanger of importance, because on the walls attached good to the heat exchange surfaces taking place heat transfer between the to be tempered Good and the heat exchange surfaces deteriorated. Of the motor drive of the scraper is outside of the Housing arranged, which is a comparatively large Requires space for the heat exchanger.

Hier setzt die vorliegende Erfindung an, deren Aufgabe es ist, einen effizienten, platzsparenden und konstruktiv einfachen sowie hygienischen Schabwärmetauscher vorzuschlagen. Diese Aufgabe wird mit Hilfe des erfindungsgemässen Schabwärmetauschers, wie er durch die Merkmale des unabhängigen Patentanspruchs charakterisiert ist, gelöst. Weitere vorteilhafte Ausgestaltungen des erfindungsgemässen Schabwärmetauschers ergeben sich aus den Merkmalen der abhängigen Patentansprüche.This is where the present invention, whose task it is is an efficient, space saving and constructive simple and hygienic scraped heat exchanger propose. This task is done with the help of according to the invention scraped heat exchanger, as he through the Characteristics of the independent claim characterized is solved. Further advantageous embodiments of Sch scrap heat exchanger according to the invention result from the Features of the dependent claims.

Bei dem erfindungsgemässen Schabwärmetauscher ist das Gehäuse mit seinen Mantelräumen glockenförmig ausgebildet. Der motorische Antrieb ist zumindest teilweise im Innenraum des glockenförmigen Gehäuses aufgenommen angeordnet. Diese besonders platzsparende Anordnung ist aufgrund der Glockenform des Gehäuses möglich. Die Glockenform ist konstruktiv einfach, und der so ausgebildete Schabwärmetauscher zeichnet sich des weiteren durch Effizienz aus.In the inventive scraped heat exchanger is the Housing bell-shaped with his coat spaces. The motor drive is at least partially in the interior received the bell-shaped housing added. These particularly space-saving arrangement is due to the Bell shape of the housing possible. The bell shape is constructively simple, and the so formed Scraped heat exchanger is characterized by further Efficiency.

Bei einer Ausgestaltung des erfindungsgemässen Schabwärmetauschers umfasst das Gehäuse ein separates inneres Gehäuseteil und ein über dieses innere Gehäuseteil überstülpbares separates äusseres Gehäuseteil, die zwischen sich den Produktraum einschliessen. Das so ausgestaltete Gehäuse kann einfach zerlegt und gut gereinigt werden, und der Erfolg des Reinigungsvorgangs kann (bei zerlegtem Gehäuse) auch einer einfachen Sichtprüfung unterzogen werden.In one embodiment of the inventive Scraped heat exchanger, the housing includes a separate inner housing part and a via this inner housing part überstülpbares separate outer housing part, the between to enclose the product space. The so designed Housing can be easily disassembled and cleaned well, and the success of the cleaning process can (with disassembled Housing) also subjected to a simple visual inspection become.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers sind die Abmessungen des Produktraums und die Abmessungen des Abstreifers in dem im wesentlichen axialen Teil des glockenförmigen Gehäuses so bemessen, dass der Produktraum einen Ringspalt bildet, in welchen der Abstreifer hineinragt. Der als schmaler Ringspalt ausgebildete Produktraum, in welchem im Betrieb der Abstreifer rotiert, hat zur Folge, dass sich, aufgrund der geometrischen Abmessungen des Ringspalts, im axialen Teil des glockenförmigen Gehäuses keine dickeren Schichten im Ringspalt bilden können, sodass in dem zu temperierenden Gut im axialen Teil des Gehäuses stets ein hoher Temperaturgradient auftritt. Infolge dieses hohen Temperaturgradienten wird eine besonders effiziente Temperierung des Guts erreicht.In a further embodiment of the inventive Schabwärmetauschers are the dimensions of the product space and the dimensions of the wiper in the substantially axial portion of the bell-shaped housing so dimensioned that the product space forms an annular gap into which the Scraper protrudes. The narrow annular gap trained product space in which in the operation of Scraper rotates, as a result, due to the geometric dimensions of the annular gap, in the axial part the bell-shaped housing no thicker layers in the Annular gap can form, so that in the material to be tempered in the axial part of the housing always a high Temperature gradient occurs. As a result of this high Temperature gradient becomes a particularly efficient Temperature control of the estate achieved.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers ist im unteren Endbereich der Mantelräume ein Einlass für das Wärmetauschmedium und im oberen Endbereich der Mantelräume ein Auslass für das Wärmetauschmedium vorgesehen. Das Wärmetauschmedium wird durch die Mantelräume gepumpt. Diese Ausgestaltung ist insofern vorteilhaft, als durch das Pumpen des Wärmetauschmediums durch die Mantelräume von unten nach oben stets eine vollständige Befüllung der Mantelräume mit dem Wärmetauschmedium gewährleistet ist, was einem guten Wärmeübergang bzw. Wärmedurchgang zuträglich ist.In a further embodiment of the inventive Schabwärmetauschers is in the lower end of the Mantelräume an inlet for the heat exchange medium and in upper end of the jacket spaces an outlet for the Heat exchange medium provided. The heat exchange medium is pumped through the mantle areas. This embodiment is advantageous insofar as by pumping the Heat exchange medium through the shell spaces from bottom to top always a complete filling of the jacket rooms with the Heat exchange medium is guaranteed, which is a good one Heat transfer or heat transfer is beneficial.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers umfasst der Abstreifer eine Nabe, von der aus mehrere Arme entspringen, die mit Schabelementen versehen sind. Die Nabe des Abstreifers ist auf einer mit dem motorischen Antrieb verbundenen Antriebswelle befestigt und ragt in einen am oberen Ende des glockenförmigen Gehäuses vorgesehenen Auslassstutzen hinein. In diesen Anschlussstutzen hinein mündet auch der Produktraum ein. Diese Ausgestaltung des Schabwärmetauschers ist von der konstruktiven Seite her besonders vorteilhaft.In a further embodiment of the inventive Schabwärmetauschers the scraper includes a hub, from which spring from several arms, those with scrapers are provided. The hub of the scraper is on a with attached to the motor drive shaft connected and juts into one at the top of the bell-shaped Housing provided outlet in it. In these The product space also opens into the connection piece. This embodiment of the scraped heat exchanger is of the constructive side ago particularly advantageous.

Bei dieser Ausgestaltung des erfindungsgemässen Schabwärmetauschers kann im unteren Endbereich des Produktraums ein Einlass für das zu temperierende Gut und am Auslassstutzen des glockenförmigen Gehäuses ein Auslass für das temperierte Gut vorgesehen sein. Die Schabelemente des Abstreifers sind dabei so ausgebildet und angeordnet, dass im Betrieb das Gut vom Einlass spiralförmig durch den Produktraum hin zum Auslass strömt. Dies bewirkt eine besonders effiziente Kühlung bzw. Erwärmung des Guts.In this embodiment of the inventive Schabwärmetauschers can in the lower end of the Product room an inlet for the material to be tempered and on Outlet of bell-shaped housing an outlet for the tempered Good be provided. The scraping of the Scrapers are designed and arranged so that in operation the gutter from the inlet spiral through the Product room flows towards the outlet. This causes a particularly efficient cooling or heating of the material.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers umfasst der motorische Antrieb ein Planetengetriebe mit einer Hohlwelle, welche die Antriebswelle, auf der die Nabe befestigt ist, aufnimmt, sodass das Planetengetriebe die motorische Antriebskraft auf die Antriebswelle umsetzt. Bei dieser Ausgestaltung ist die Antriebswelle einfach montierbar und über das Planetengetriebe kann gewünschtenfalls eine Übersetzung/Untersetzung erfolgen.In a further embodiment of the inventive Schabwärmetauschers includes the motor drive Planetary gear with a hollow shaft, which the Drive shaft on which the hub is mounted, receives, so that the planetary gear on the motor drive power the drive shaft converts. In this embodiment, the Drive shaft easy to install and over the Planetary gear can, if desired, a Translation / reduction made.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers weist die Antriebswelle in demjenigen Bereich, in welchem die Nabe befestigt ist, eine Polygon-Aussenkontur auf, und die Nabe eine entsprechende Innenkontur. Dadurch ist die Nabe nach ihrer Befestigung auf der Antriebswelle gegenüber der Antriebswelle positionsfest.In a further embodiment of the inventive Schabwärmetauschers has the drive shaft in the one Area in which the hub is fixed, a polygon outer contour on, and the hub a corresponding one Inner contour. As a result, the hub is on after its attachment the drive shaft relative to the drive shaft fixed position.

Bei einer weiteren Ausgestaltung des erfindungsgemässen Schabwärmetauschers ist das Gehäuse lösbar mit einem separaten Gestell verbunden, welches höhenverstellbare Füsse aufweist. Diese Ausgestaltung hat den Vorteil, dass das Gehäuse separat vom Gestell abnehmbar (und dadurch z.B. auch leichter zerlegbar und reinigbar ist, siehe auch Ausgestaltung mit innerem und äusserem Gehäuseteil weiter oben), andererseits kann durch die höhenverstellbaren Füsse am Gestell eine gute Justage des Schabwärmetauschers insgesamt erfolgen, unabhängig davon, wie eben z.B. die Fläche ist, auf der das Gestell steht.In a further embodiment of the inventive Schabwärmetauschers, the housing is detachable with a separate frame connected, which height adjustable feet having. This embodiment has the advantage that the Housing separately removable from the frame (and thereby, for example Easier to disassemble and clean, see also Design with inner and outer housing part on above), on the other hand, by the height-adjustable feet on the frame a good adjustment of Schabwärmetauschers in total, regardless of how, e.g. the Surface is on which the frame stands.

Schliesslich umfasst eine weitere Ausgestaltung des erfindungsgemässen Schabwärmetauschers einen Frequenzumformer zur Steuerung der Drehzahl des motorischen Antriebs. Diese Ausgestaltung erlaubt eine besonders einfache und zuverlässige Steuerung der Drehzahl des motorischen Antriebs.Finally, a further embodiment of the a scraped heat exchanger according to the invention Frequency converter for controlling the speed of the motor Drive. This embodiment allows a special simple and reliable control of the speed of the motor drive.

Weitere vorteilhafte Ausgestaltungen ergeben sich aus der nachfolgenden Erläuterung eines Ausführungsbeispiels des erfindungsgemässen Schabwärmetauschers mit Hilfe der Zeichnung. Es zeigen in schematischer Darstellung:

Fig. 1
eine perspektivische Explosionsdarstellung eines Ausführungsbeispiels eines erfindungsgemässen Schabwärmetauschers mit glockenförmigem Gehäuse und separatem Gestell
und
Fig. 2
das Ausführungsbeispiel aus Fig. 1 im Zusammenbau, teilweise in Schnittdarstellung.
Further advantageous embodiments will become apparent from the following explanation of an embodiment of the invention Schabwärmetauschers using the drawing. In a schematic representation:
Fig. 1
an exploded perspective view of an embodiment of a scraped heat exchanger according to the invention with a bell-shaped housing and a separate frame
and
Fig. 2
the embodiment of Fig. 1 in the assembly, partially in section.

Das in Fig. 1 und Fig. 2 gezeigte Ausführungsbeispiel eines erfindungsgemässen Schabwärmetauschers 1 umfasst ein glockenförmiges Gehäuse 2 mit zwei separaten Gehäuseteilen, einem inneren Gehäuseteil 20 und einem über das innere Gehäuseteil überstülpbaren äusseren Gehäuseteil 21. In dem inneren Gehäuseteil 20 und in dem äusseren Gehäuseteil ist jeweils ein Mantelraum 200 bzw. 210 vorgesehen. Im unteren Endbereich der Mantelräume 200 bzw. 210 ist jeweils ein Einlass und im oberen Endbereich der Mantelräume jeweils ein Auslass für ein Wärmetauschmedium vorgesehen (nur der Einlass 211 und der Auslass 212 des äusseren Gehäuseteils 21 sind zu erkennen), welches im Betrieb durch die Mantelräume gepumpt wird, beispielsweise eine Kühlflüssigkeit (oder im Falle einer gewünschten Erwärmung eine Heizflüssigkeit). Der innere Mantelraum 200 ist von einer Wärmetauschfläche 200a und der äussere Mantelraum von einer Wärmetauschfläche 210a begrenzt. Die Wärmetauschflächen 200a des inneren Gehäuseteils 20 bzw. 210a des äusseren Gehäuseteils 21 definieren zwischen sich einen Produktraum 3, in welchen hinein ein Abstreifer 4 ragt. Die beiden Gehäuseteile 20 und 21 werden durch einen mit Schnellspannern 23 versehenen Spannring 22 zusammengehalten.The embodiment shown in FIG. 1 and FIG Scraper heat exchanger 1 according to the invention comprises a bell-shaped housing 2 with two separate housing parts, an inner housing part 20 and one on the inner Housing part überstülpbaren outer housing part 21. In the inner housing part 20 and in the outer housing part in each case a jacket space 200 or 210 is provided. At the bottom End region of the shell spaces 200 and 210 is one each Inlet and in the upper end of the Mantelräume one each Outlet intended for a heat exchange medium (only the Inlet 211 and the outlet 212 of the outer housing part 21st can be seen), which in operation through the jacket spaces is pumped, for example, a coolant (or im Case of a desired heating a heating fluid). Of the inner shell space 200 is from a heat exchange surface 200a and the outer shell space of a heat exchange surface 210a limited. The heat exchange surfaces 200a of the inner Housing part 20 and 210 a of the outer housing part 21st define between them a product space 3, in which a scraper 4 protrudes into it. The two housing parts 20 and 21 are provided by a quick-release 23 Clamping ring 22 held together.

Der Produktraum 3 weist - ähnlich wie das Gehäuse 2 - eine glockenförmige Gestalt auf und bildet im axialen Teil 24 des glockenförmigen Gehäuses 2 einen Ringspalt, wobei sich an den axialen Teil 24 ein etwa horizontal verlaufender Teil 25 des glockenförmigen Gehäuses 2 anschliesst. Ein Einlass 30 für das zu temperierende Gut ist im unteren Endbereich des Produktraums 3 vorgesehen, während am oberen Ende des glockenförmigen Gehäuses ein Auslassstutzen 31 für das temperierte Gut vorgesehen ist.The product space 3 has - similar to the housing 2 - a bell-shaped and forms in the axial part 24 of the bell-shaped housing 2 an annular gap, wherein at the axial part 24 is an approximately horizontally extending part 25th the bell-shaped housing 2 connects. An inlet 30 for the material to be tempered is in the lower end of the Product space 3 provided while at the upper end of the bell-shaped housing an outlet 31 for the Well tempered is provided.

Der Abstreifer 4 umfasst eine Nabe 40, von der aus mehrere Arme 41 - bei dem dargestellten Ausführungsbeispiel vier Arme - entspringen, die hier jeweils als Doppelstreben 410,411 ausgebildet sind. Die Doppelstreben 410,411 schliessen einen Spalt 412 zwischen sich ein, in welchen Schabelemente 42 eingesetzt sind. An dem der Nabe 40 abgewandten Ende sind die Arme 41 durch eine umlaufende Strebe 42 miteinander verbunden, was eine Versteifung bewirkt. Eine weitere Strebe 43 ist zu diesem Zweck im nabennahen Bereich der Arme 41 vorgesehen.The scraper 4 comprises a hub 40, from which several Arms 41 - four in the illustrated embodiment Arms - spring up here as double struts 410,411 are formed. The double struts 410,411 enclose a gap 412 between them, in which Schabelemente 42 are used. At the hub 40th facing away from the arms 41 by a circumferential Strut 42 connected together, giving a stiffener causes. Another strut 43 is for this purpose in provided near the hub region of the arms 41.

Die Schabelemente 42 weisen sowohl nach aussen hervorstehende Vorsprünge 420 als auch nach innen hervorstehende Vorsprünge 421 auf (die nach innen vorstehenden Vorsprünge 421 stellen nach aussen hin betrachtet Vertiefungen dar). Durch die Gestaltung dieser Vorsprünge 420 und Vertiefungen 421 kann bei in den Spalt 412 eingesetzten Schabelementen 42 im Betrieb - also bei rotierendem Abstreifer 4 - eine spiralförmige Strömung des im unteren Endbereich durch den Einlass 30 zugeführten zu temperierenden Guts erzeugt werden, was eine effiziente Kühlung bzw. Erwärmung des Guts ermöglicht. Ausserdem streifen die nach aussen und innen vorstehenden Vorsprünge 420 bzw. 421 eventuell sich an den Wärmetauschflächen 200a bzw. 210a anlagerndes Gut von diesen Flächen ab, was einer Verringerung der Effizienz des Wärmeübergangs entgegenwirkt und damit die Effizienz des Wärmetauschers 1 steigert.The scraping elements 42 are facing outwards projecting protrusions 420 as well as inward protruding projections 421 (the inward projecting projections 421 face outward considers wells). By designing this Projections 420 and recesses 421 may be in the gap 412 inserted scraping elements 42 in operation - ie at Rotating scraper 4 - a spiral flow of the in the lower end region through the inlet 30 supplied to tempering Guts are generated, which is an efficient Cooling or heating of the estate allows. Moreover strip the outwardly and inwardly projecting protrusions 420 and 421 may be on the heat exchange surfaces 200a 210a Anlagerndes from these surfaces from what a Reduction of the efficiency of heat transfer counteracts and thus the efficiency of the heat exchanger 1 increases.

Die Nabe 40 des Abstreifers 4 ist auf einer Antriebswelle 5 angeordnet, die durch ein Dichtungselement 6 durchgeführt ist. Mittels eines Sicherungselements 7 ist die Nabe 40 auf der Antriebswelle 5 befestigt und ragt in den Auslassstutzen 31 des glockenförmigen Gehäuses 2 hinein. Die Antriebswelle 5 weist in demjenigen Bereich in welchem die Nabe 40 befestigt ist, eine Polygon-Aussenkontur auf, und die Nabe 40 weist eine entsprechende Innenkontur auf. Somit kann die Nabe 40 in einfacher Weise auf die Antriebswelle 5 aufgesetzt werden, und kann sich sodann gegenüber der Antriebswelle 5 nicht mehr verdrehen.The hub 40 of the scraper 4 is on a drive shaft. 5 arranged, which is performed by a sealing element 6 is. By means of a securing element 7, the hub 40 is on the drive shaft 5 is fixed and protrudes into the outlet 31 of the bell-shaped housing 2 inside. The drive shaft 5 has in the area in which the hub 40th is attached, a polygon outer contour on, and the hub 40 has a corresponding inner contour. Thus, the Hub 40 in a simple manner to the drive shaft. 5 can then be placed opposite the Drive shaft 5 no longer rotate.

An dem inneren Gehäuseteil 20 ist im zentralen Bereich nahe der Antriebswelle 5 eine Aufnahme 201 für eine Dichtungsanordnung 50 ausgebildet, sodass die Dichtungsanordnung 50 auf einfache Weise zentriert montiert werden kann, was den Montage- und auch den Demontagevorgang erleichtert und insbesondere keine Verschraubung der Dichtungsanordnung 50 erfordert. On the inner housing part 20 is close in the central area the drive shaft 5, a receptacle 201 for a Seal assembly 50 is formed so that the Seal assembly 50 mounted in a simple manner centered can be what the assembly and disassembly process facilitates and in particular no screwing the Sealing arrangement 50 requires.

Zum Antreiben der Antriebswelle 5 und damit zum rotatorischen Antreiben des Abstreifers 4 ist ein motorischer Antrieb 8 vorgesehen, der einen Motor 80 sowie bei dem hier gezeigten Ausführungsbeispiel ein Planetengetriebe 81 aufweist. Das Planetengetriebe 81 kann dabei eine Hohlwelle umfassen, welche die Antriebswelle 5 aufnimmt, sodass das Planetengetriebe 81 die motorische Antriebskraft auf die Antriebswelle 5 umsetzt. Die Antriebswelle 5 lässt sich so in einfacher Weise montieren bzw. demontieren. Die Drehzahl des Motors 80 kann beispielsweise durch einen Frequenzumformer (nicht dargestellt) besonders einfach angesteuert werden.For driving the drive shaft 5 and thus for Rotational driving of the scraper 4 is a motor drive 8 is provided, which has a motor 80 as well in the embodiment shown here Planetary gear 81 has. The planetary gear 81 can thereby comprise a hollow shaft, which the drive shaft. 5 receives, so that the planetary gear 81, the motor Driving force on the drive shaft 5 converts. The Drive shaft 5 can be mounted in a simple manner or dismantle. The speed of the motor 80 can for example by a frequency converter (not shown) are particularly easy to control.

Wie man erkennen kann, ist der motorische Antrieb 8 in einem separaten Gestell 9 aufgehängt, mit welchem das Gehäuse 2 fest, jedoch lösbar verbunden ist, sodass es beispielsweise zum Zerlegen einfach von dem Gestell abgenommen werden kann. Das Gehäuse 2 ist zu diesem Zweck an einem Gehäuseteil, z.B. an dem inneren Gehäuseteil 20, mit Ösen 202 versehen, welche mit dem Gestell 9 verschraubt werden können. Auf diese Weise kann auch das von dem angetriebenen Abstreifer 4 über das zu temperierende Gut auf das Gehäuse 2 übertragene Drehmoment von dem Gestell 9 aufgenommen werden. Das Gestell 9 ist hier als Dreibein ausgebildet, mit höhenverstellbaren Füssen 90 zum Ausgleichen von Unebenheiten der Fläche, auf der der Wärmetauscher 1 aufgestellt werden soll. Zum Reinigen und/oder zur Sichtprüfung des Erfolgs einer durchgeführten Reinigung kann das Gehäuse 2 zerlegt werden, indem das über das innere Gehäuseteil 21 übergestülpte äussere Gehäuseteil 20 abgezogen wird.As you can see, the motor drive 8 is in one suspended separate frame 9, with which the housing. 2 fixed, but releasably connected, so it for example can be easily removed from the rack for disassembly. The housing 2 is for this purpose attached to a housing part, e.g. on the inner housing part 20, provided with eyelets 202, which can be screwed to the frame 9. In this way can also be that of the driven scraper 4 on the tempering Well transmitted to the housing 2 torque be absorbed by the frame 9. The frame 9 is here designed as a tripod, with height-adjustable feet 90 to compensate for unevenness of the surface on which the Heat exchanger 1 should be set up. For cleaning and / or for visual inspection of the success of a performed Cleaning, the housing 2 can be disassembled by the over the inner housing part 21 pushed over the outer housing part 20 is subtracted.

Im Zusammenbau (siehe Fig. 2)ist der motorische Antrieb 8 zumindest teilweise, bei dem gezeigten Ausführungsbeispiel sogar fast vollständig, in dem Innenraum des glockenförmigen Gehäuses 2 aufgenommen, was eine besonders kompakte und platzsparende Bauweise des erfindungsgemässen Schabwärmetauschers 1 zur Folge hat und aufgrund des glockenförmigen Gehäuses 2 möglich ist.In the assembly (see FIG. 2), the motor drive 8 at least partially, in the illustrated embodiment even almost completely, in the interior of the bell-shaped Housing 2 added, which is a particularly compact and space-saving design of the inventive Schabwärmetauschers 1 result and due to the bell-shaped housing 2 is possible.

Im Betrieb wird zu temperierendes Gut durch den Einlass 30 in den unteren Endbereich der Produktraums 3 gepumpt. Der im Produktraum 3 zwischen den Wärmetauschflächen 200a und 210a rotierende Abstreifer 4 bewirkt in dem schmalen Ringspalt eine spiralförmige Strömung des zu temperierenden Guts, welches so auf effiziente Weise temperiert wird. Durch ein Abstoppen des rotierenden Abstreifers 4 oder durch eine schnelles Abbremsen (schnelle Änderung der Rotationsgeschwindigkeit) kann gewünschtenfalls eine Durchmischung des Guts erreicht werden.In operation, material to be tempered is passed through the inlet 30 pumped into the lower end of the product space 3. The im Product space 3 between the heat exchange surfaces 200a and 210a rotating scraper 4 causes in the narrow annular gap a spiral flow of the material to be tempered, which is thus tempered in an efficient manner. Through a Stopping the rotating scraper 4 or by a fast braking (rapid change of Rotation speed) can, if desired, a Mixing of the estate can be achieved.

Claims (10)

  1. Scraped surface heat exchanger (1) comprising a housing (2) with sleeve chambers (200,210), through which a heat exchange medium may flow and which are bounded by heat exchange surfaces (200a,210a) defining a product chamber (3) for a flowable material to be tempered, further comprising a scraper (4) extending into the product chamber (3) for scraping material which may deposit on the heat exchange surfaces (200a,210a), and further comprising a motor drive (8) for rotatingly driving the scraper (4), characterised in that the housing (2) with its sleeve chambers (200,210) is bell-shaped and in that the motor drive (8) is at least partly arranged within the inner space of the bell-shaped housing (2).
  2. Scraped surface heat exchanger according to claim 1, wherein the housing (2) comprises a separate inner housing part (20) and a separate outer housing part (21) to be slipped over the inner housing part (20), enclosing between them the product chamber (3).
  3. Scraped surface heat exchanger according to claim 1 or 2, wherein the dimensions of the product chamber (3) and the dimensions of the scraper (4) in the substantially axial part (24) of the bell-shaped housing (2) are chosen such that the product chamber (3) forms an annular gap, with the scraper extending into the gap (4).
  4. Scraped surface heat exchanger according to any one of the preceding claims, wherein in the lower end region of the sleeve chambers (200,210) an inlet (211) and in the upper end region of the sleeve chambers (200,210) an outlet (212) for the heat exchange medium are provided.
  5. Scraped surface heat exchanger according to any one of the preceding claims, wherein the scraper (4) comprises a hub (40) with a plurality of arms (41) extending therefrom, the arms being provided with sraping elements (42), and wherein the hub (40) of the scraper (4) is mounted to a drive shaft (5) which is connected to the motor drive (8) and which extends into an outlet neck (31) provided at the upper end of the bell-shaped housing (2), with the the product chamber (3) also leading into the outlet neck.
  6. Scraped surface heat exchanger according to claim 5, wherein an inlet (30) is provided in the lower end region of the product chamber (3) for the material to be tempered and an outlet is provided at the outlet neck (31) of the bell-shaped housing (2) for the tempered material, and wherein the scraping elements (42) are designed and arranged such that during operation the material flows through the product chamber (3) in the manner of a spiral.
  7. Scraped surface heat exchanger according to claim 5 or 6, wherein the motor drive (8) comprises a sun-and-planet gear (81) having a hollow shaft which accommodates the drive shaft (5) mounted to the hub (40), so that the sun-and-planet gear (81) transmits the driving force of the motor to the drive shaft (5).
  8. Scraped surface heat exchanger according to any one of claims 5 to 7, wherein the drive shaft (5) has a polygonal outer contour in the region where the hub (40) is mounted, and wherein the hub (40) has a corresponding inner contour.
  9. Scraped surface heat exchanger according to any one of the preceding claims, wherein the housing (2) is releasably connected to a separate rack (9) having height-adjustable feet (90).
  10. Scraped surface heat exchanger according to any one of the preceding claims, comprising a frequency converter for controlling the number of revolutions of the motor drive (8).
EP03700003A 2002-01-14 2003-01-07 Scraped surface heat exchanger Expired - Lifetime EP1466135B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH46022002 2002-01-14
CH462002 2002-01-14
PCT/CH2003/000003 WO2003058147A1 (en) 2002-01-14 2003-01-07 Scraped surface heat exchanger

Publications (2)

Publication Number Publication Date
EP1466135A1 EP1466135A1 (en) 2004-10-13
EP1466135B1 true EP1466135B1 (en) 2005-10-19

Family

ID=4279497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03700003A Expired - Lifetime EP1466135B1 (en) 2002-01-14 2003-01-07 Scraped surface heat exchanger

Country Status (3)

Country Link
EP (1) EP1466135B1 (en)
AU (1) AU2003200828A1 (en)
WO (1) WO2003058147A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1028818A (en) * 1911-05-16 1912-06-04 Gustav A Fischer Pasteurizing-machine.
CH206815A (en) * 1937-06-18 1939-08-31 Brix Hansen John Refrigerator.
DE2549600C3 (en) * 1975-11-05 1979-10-04 Fryma-Maschinen Ag, Rheinfelden (Schweiz) Heat exchanger
US5165469A (en) * 1991-05-17 1992-11-24 Smith Douglas W P High viscous fluid heat exchanger

Also Published As

Publication number Publication date
AU2003200828A1 (en) 2003-07-24
WO2003058147A1 (en) 2003-07-17
EP1466135A1 (en) 2004-10-13

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