WO2004051159A1 - Scraped surface heat exchanger - Google Patents

Scraped surface heat exchanger Download PDF

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Publication number
WO2004051159A1
WO2004051159A1 PCT/DE2003/003910 DE0303910W WO2004051159A1 WO 2004051159 A1 WO2004051159 A1 WO 2004051159A1 DE 0303910 W DE0303910 W DE 0303910W WO 2004051159 A1 WO2004051159 A1 WO 2004051159A1
Authority
WO
WIPO (PCT)
Prior art keywords
peltier elements
heat exchanger
product cylinder
heat
cylinder
Prior art date
Application number
PCT/DE2003/003910
Other languages
German (de)
French (fr)
Original Assignee
Russmann, Frank
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 Russmann, Frank filed Critical Russmann, Frank
Priority to DE10394115T priority Critical patent/DE10394115D2/en
Priority to EP03767453A priority patent/EP1565694A1/en
Priority to AU2003291948A priority patent/AU2003291948A1/en
Publication of WO2004051159A1 publication Critical patent/WO2004051159A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/30—Cleaning; Keeping clean; Sterilisation
    • A23G9/305—Sterilisation of the edible materials
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J15/00—Manufacturing butter
    • A01J15/10—Devices for manufacturing butter other than by churns
    • A01J15/12—Devices for manufacturing butter other than by churns with arrangements for making butter in a continuous process
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/14—Continuous production
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/222—Freezing drums
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/16—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials
    • A23L3/18—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials while they are progressively transported through the apparatus
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A23L3/361—Freezing; Subsequent thawing; Cooling the materials being transported through or in the apparatus, with or without shaping, e.g. in form of powder, granules, or flakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • F25B21/04—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect reversible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
    • F25C1/145—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the inner walls of cooled bodies
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/025—Removal of heat
    • F25B2321/0252—Removal of heat by liquids or two-phase fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y02A40/963—Off-grid food refrigeration

Definitions

  • the invention relates to a heat exchanger according to the preamble of claim 1.
  • Such a heat exchanger which is a scraped heat exchanger, is known from EP 0 727 634 B1.
  • the product to be treated and tempered is pumped through a product cylinder.
  • the heat exchanger is used for cooling, ice water, glycol or brine is used as the heat transfer medium for the amount of heat to be dissipated, or directly evaporating liquid freon or ammonia is used.
  • the media freon or ammonia are not only a danger to the environment, but also to the people who operate the devices with appropriate heat exchangers.
  • the invention is therefore based on the object of providing a heat exchanger of the type mentioned at the beginning in which the use of substances which are environmentally hazardous or dangerous to the operator is avoided.
  • the scraping heat exchanger according to the invention is intended for the continuous heating or cooling of viscous or highly viscous masses. It has a product cylinder which is surrounded by a heat transfer medium and in which a rotationally driven shaft is arranged which, together with the product cylinder, forms a gap space with an annular cross section for receiving the mass to be treated.
  • the basic idea of the present invention is that Peltier elements are arranged between the heat transfer medium and the product cylinder on the side facing away from the annular gap. The Peltier elements can be attached practically to the entire surface of the product cylinder, so that good heat transfer is ensured.
  • the Peltier elements preferably form a heat pump when the heat exchanger is used for cooling. However, by reversing the polarity of the voltage supply, they can also be used to heat the mass to be treated.
  • the Peltier elements are arranged in an annular gap through which the heat transfer medium flows, which is formed by the product cylinder on the one hand and an outer cylinder surrounding the latter.
  • the Peltier elements are advantageously made of a jacket made of thermally conductive material. h ⁇ ft copper, covered. In this way, the Peltier elements are protected against the heat transfer medium, on the other hand, however, are connected to this material with good thermal conductivity.
  • a thermally conductive protective jacket can be dispensed with if the Peltier elements are designed to be correspondingly corrosion-resistant.
  • the product cylinder 3 is designed as a Peltier element over its entire circumference, since then a very uniform and equally intense cooling or heat effect can be achieved.
  • the entire product cylinder or parts thereof can have one or more plane surfaces on the side facing the Peltier elements, which are designed to receive plane-shaped Peltier elements.
  • Such a design is advantageous if the flat Peltier elements are available at a significantly lower cost than those intended for application to a cylinder surface.
  • good heat-conducting adapter pieces can also be provided here, which have the cylinder curvature on one side and a flat surface on the other.
  • the annular gap space of the scraping heat exchanger in which the masses to be treated are accommodated is advantageously provided with scraping knives which are attached to the rotating shaft and touch the inside of the cylinder and constantly scrape off when the shaft is rotated in order to ensure good heat transfer to allow between the mass to be treated in the gap and the cylinder wall.
  • scraping knives which are attached to the rotating shaft and touch the inside of the cylinder and constantly scrape off when the shaft is rotated in order to ensure good heat transfer to allow between the mass to be treated in the gap and the cylinder wall.
  • This is particularly expedient when materials are processed which, due to their crystallizing or highly viscous properties, have an insulating layer on the surface facing the medium form.
  • the invention can therefore advantageously be used in so-called scraping heat exchangers which are equipped with scraping knives.
  • Figure 1 is a perspective view of a scraped surface heat exchanger as an embodiment according to the invention.
  • the heat exchangers are used to heat or cool different substances, but preferably food.
  • food for example, margarine, mayonnaise and starch. Creams and ointments are also treated.
  • Peltier elements 5 are used, in particular for thermoelectric cooling.
  • the Peltier effect is based on the fact that in a two-wire circuit of a thermocouple through which current flows, one solder joint is cooled and the other is heated. The electrical current thus creates a temperature gradient between the soldering points at the originally uniform temperature of the conductor circuit.
  • the invention makes use of this effect in order to dissipate the heat on the secondary side of the product cylinder 3, that is to say on the side lying away from the annular gap space 10.
  • the invention can be used for cooling or for heating.
  • the following is an example of that shown in the drawing Sch ⁇ befflet ⁇ uscher described for cooling a mass to be treated.
  • the mass to be treated is pumped through an annular gap 10 between a rotary shaft 2 and a product cylinder 3.
  • Scraper knives 1 which are attached to the shaft 2, scrape off the product to be treated from the inner wall of the product cylinder 3 and thus ensure circulation and a correspondingly improved heat transfer.
  • a number of Peltier elements 5 are arranged on the outside of the product cylinder 3 and can in principle be connected in series or in parallel.
  • the electrical leads run through column 4 and at 12 in Fig. 2 to the outside.
  • the Peltier elements 5 are covered and protected by an outer jacket 6 made of thermally conductive material, for example copper sheet.
  • This unit consisting of Peltier elements 5 and outer jacket 6 is located in an outer cylinder 8, which is flushed through by the heat transfer medium. This heat transfer medium enters at 14 and exits at 15.
  • the annular gap in which the unit consisting of Peltier elements 5 and thermally conductive jacket 6 is located is designated by 7. Seals 9 seal this space, in which the Peltier elements 5 lie, on the end faces.
  • the annular gap 7 is sealed against the product cylinder 3 by a seal 16.
  • On the other side there is a flange 13 which provides a seal 1 1 for sealing against a corresponding flange of the outer cylinder 8.
  • the mass to be treated is pumped through the annular gap space 10 between the product cylinder 3 and the shaft 2.
  • Electric current flows through the Peltier elements 5 in such a way that the known cooling effect occurs.
  • the resulting heat on the opposite side facing away from the gap 10 The surface of the Peltier element 5 is discharged through the heat transfer medium in the annular gap 7.
  • the Peltier elements 5 can also be used as a full-surface coating instead of individual elements. As a result, the temperature level is guided more evenly and without gaps.
  • the Peltier elements 5 can also be used without a heat-conducting copper protective film 6 provided that they are made of corrosion-resistant materials or are provided with such materials.
  • the cylinder 10 can also be advantageously designed on the side facing the Peltier elements axially extending flat surfaces instead of a cylindrical shape. This feature has the advantage that flat elements can be applied.

Abstract

The invention relates to a heat exchanger, preferably a scraped surface heat exchanger, designed to heat or cool viscous or highly viscous material. Said heat exchanger is equipped with a product cylinder (3), which is surrounded by the heat transfer medium and contains a rotationally driven shaft (2). The shaft and the product cylinder form a gap (10) with an annular cross-section for receiving the material to be treated. To avoid the use of substances that are harmful to the environment or the operator as coolants, Peltier elements (5) are arranged between the heat transfer medium and the product cylinder (3) on the side of latter that faces away from the annular gap (10). Said Peltier elements cool the material to be treated on the secondary side, enabling water to be used as the coolant, said water posing no threat to the environment and being re-cooled without difficulty in water towers. The cooling process takes advantage of the effect of the thermal pump of the Peltier element.

Description

Titel: SchαbewärmetαuscherTitle: Schαbewärmetαuscher
Beschreibungdescription
Die Erfindung betrifft einen Wärmetauscher nach dem Oberbegriff des Anspruches 1.The invention relates to a heat exchanger according to the preamble of claim 1.
Ein derartiger Wärmetauscher, bei dem es sich um einen Schabewär- metauscher handelt, ist aus der EP 0 727 634 Bl bekannt. Bei diesem bekannten Wärmetauscher wird das zu behandelnde und zu temperierende Produkt durch einen Produktzylinder gepumpt. Wenn der Wärmetauscher zum Kühlen eingesetzt wird, wird als Warmeubertragungsmedium für die abzuführende Wärmemenge auf der Sekundärseite Eiswasser, Glycol oder Sole eingesetzt oder direkt verdampfendes flüssiges Freon oder Ammoniak verwendet. Die Medien Freon oder Ammoniak sind nicht nur eine Gefahr für die Umwelt, sondern auch für die Personen, die die Vorrichtungen mit entsprechenden Wärmetauschern bedienen.Such a heat exchanger, which is a scraped heat exchanger, is known from EP 0 727 634 B1. In this known heat exchanger, the product to be treated and tempered is pumped through a product cylinder. If the heat exchanger is used for cooling, ice water, glycol or brine is used as the heat transfer medium for the amount of heat to be dissipated, or directly evaporating liquid freon or ammonia is used. The media freon or ammonia are not only a danger to the environment, but also to the people who operate the devices with appropriate heat exchangers.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Wärmetauscher der eingangs genannten Art zu schaffen, bei dem der Einsatz von umweltgefährdenden oder für den Bediener gefährlichen Stoffen vermieden wird.The invention is therefore based on the object of providing a heat exchanger of the type mentioned at the beginning in which the use of substances which are environmentally hazardous or dangerous to the operator is avoided.
Diese Aufgabe wird durch die in Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen sowie der nachfolgenden Beschreibung angegeben. Erfindungsgemäß wird die an sich bekannte Technik des Peltierelemen- tes eingesetzt, wobei bei entsprechend technischer Anwendung mehrere Peltierelemente zum Einsatz kommen. Bei dem Wärmetauscher nach der Erfindung erfolgt die Ableitung der abzuführenden Wärme- menge nahezu ausschließlich durch das Peltierelement. Hierdurch ist es möglich, gewöhnliches Kühlwasser einzusetzen, dessen Austrittstemperatur über der Umgebungstemperatur liegt. Dieses Kühlwasser ist einfach in herkömmlichen Kühltürmen aufzubereiten.This object is achieved by the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims and the description below. According to the invention, the technology known per se of the Peltier element is used, with several Peltier elements being used with a corresponding technical application. In the heat exchanger according to the invention, the amount of heat to be removed is dissipated almost exclusively by the Peltier element. This makes it possible to use ordinary cooling water whose outlet temperature is above the ambient temperature. This cooling water is easy to treat in conventional cooling towers.
Der Schabewärmetauscher gemäß der Erfindung ist zum kontinuierlichen Erhitzen oder Kühlen von viskosen- oder hochviskosen Massen vorgesehen. Er weist einen Produktzylinder auf, der von einem Wärmeträgermedium umgeben ist und in dem eine drehangetriebene Welle angeordnet ist, die mit dem Produktzylinder einen im Querschnitt ring- förmigen Spaltraum zur Aufnahme der zur behandelnden Masse bildet. Grundgedanke der vorliegenden Erfindung ist es, dass zwischen dem Warmeubertragungsmedium und dem Produktzylinder auf der vom ringförmigen Spaltraum abgewandten Seite Peltierelemente angeordnet sind. Die Peltierelemente lassen sich praktisch vollflächig auf dem Produktzylinder anbringen, so dass für einen guten Wärmeübergang gesorgt ist.The scraping heat exchanger according to the invention is intended for the continuous heating or cooling of viscous or highly viscous masses. It has a product cylinder which is surrounded by a heat transfer medium and in which a rotationally driven shaft is arranged which, together with the product cylinder, forms a gap space with an annular cross section for receiving the mass to be treated. The basic idea of the present invention is that Peltier elements are arranged between the heat transfer medium and the product cylinder on the side facing away from the annular gap. The Peltier elements can be attached practically to the entire surface of the product cylinder, so that good heat transfer is ensured.
Bevorzugt bilden die Peltierelemente eine Wärmepumpe, wenn der Wärmetauscher zur Kühlung eingesetzt wird. Sie können jedoch durch Umpolung der Spannungsversorgung ggf. auch zur Erhitzung der zu behandelnden Masse eingesetzt werden.The Peltier elements preferably form a heat pump when the heat exchanger is used for cooling. However, by reversing the polarity of the voltage supply, they can also be used to heat the mass to be treated.
Besonders günstig ist es, wenn die Peltierelemente in einen von dem Warmeubertragungsmedium durchströmten Ringspalt angeordnet sind, der durch den Produktzylinder einerseits und einen diesen umgebenen äußeren Zylinder andererseits gebildet ist. Dabei sind die Peltierelemente vorteilhaft von einem Mantel aus wärmeleitfähigem Material, vorteil- hαft Kupfer, abgedeckt. Auf diese Weise sind die Peltierelemente gegenüber dem Wärmeträgermedium geschützt, andererseits jedoch gut wärmeleitend mit diesem Verbunden. Auf einen wärmeleitfähigen schützenden Mantel kann verzichtet werden, wenn die Peltierelemente entsprechend korrosionsfest ausgebildet sind.It is particularly advantageous if the Peltier elements are arranged in an annular gap through which the heat transfer medium flows, which is formed by the product cylinder on the one hand and an outer cylinder surrounding the latter. The Peltier elements are advantageously made of a jacket made of thermally conductive material. hαft copper, covered. In this way, the Peltier elements are protected against the heat transfer medium, on the other hand, however, are connected to this material with good thermal conductivity. A thermally conductive protective jacket can be dispensed with if the Peltier elements are designed to be correspondingly corrosion-resistant.
Vorteilhaft ist es, wenn der Produktzylinder 3 über seinen gesamten Umfang als Peltierelement ausgeführt ist, da dann eine sehr gleichmäßige und zu gleich intensive Kühlwirkung bzw. Wärmeeinwirkung erzielt wer- den kann.It is advantageous if the product cylinder 3 is designed as a Peltier element over its entire circumference, since then a very uniform and equally intense cooling or heat effect can be achieved.
Gemäß einer Weiterbildung der Erfindung können der gesamte Produktzylinder oder Teile davon auf der den Peltierelementen zugewandten Seite ein oder mehrere Planeflächen aufweisen, die zur Aufnahme von planflächig ausgebildeten Peltierelementen ausgebildet sind. Eine solche Ausbildung ist dann günstig, wenn die planen Peltierelemente wesentlich kostengünstiger verfügbar sind als die zum Aufbringen auf eine Zylinderfläche vorgesehenen. Alternativ können hier auch entsprechende gut wärmeleitende Adapterstücke vorgesehen sein, wel- ehe zu einer Seite die Zylinderwölbung und zur anderen eine Planfläche aufweisen.According to a development of the invention, the entire product cylinder or parts thereof can have one or more plane surfaces on the side facing the Peltier elements, which are designed to receive plane-shaped Peltier elements. Such a design is advantageous if the flat Peltier elements are available at a significantly lower cost than those intended for application to a cylinder surface. As an alternative, corresponding, good heat-conducting adapter pieces can also be provided here, which have the cylinder curvature on one side and a flat surface on the other.
Der ringförmige Spaltraum des Schabewärmetauscher in dem die zubehandelnden Massen aufgenommen werden ist vorteilhaft mit Scha- bemessern versehen, welche an der drehangetriebenen Welle befestigt sind und die Oberfläche des Zylinders an seiner Innenseite berühren und beim Drehen der Welle ständig abschaben um auf diese Weise einen guten Wärmeübergang zwischen der im Spaltraum befindlichen zu behandelnden Masse und der Zylinderwandung zu ermöglichen. Dies ist insbesondere dann zweckmäßig, wenn Stoffe verarbeitet werden, die aufgrund ihrer kristallisierenden oder hochviskosen Eigenschaft an der dem Medium zugewandten Oberfläche eine isolierende Schicht bilden. In vorteilhafter Weise lässt sich also die Erfindung bei so genannten Schabewärmetauschern einsetzen, die mit Schabemessern ausgerüstet sind.The annular gap space of the scraping heat exchanger in which the masses to be treated are accommodated is advantageously provided with scraping knives which are attached to the rotating shaft and touch the inside of the cylinder and constantly scrape off when the shaft is rotated in order to ensure good heat transfer to allow between the mass to be treated in the gap and the cylinder wall. This is particularly expedient when materials are processed which, due to their crystallizing or highly viscous properties, have an insulating layer on the surface facing the medium form. The invention can therefore advantageously be used in so-called scraping heat exchangers which are equipped with scraping knives.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Es zeigen:The invention is explained below with reference to an embodiment shown in the drawing. Show it:
Fig. 1 eine perspektivische Ansicht eines Schabewärmeaustauschers als eine Ausführungsform nach der Erfindung; undFigure 1 is a perspective view of a scraped surface heat exchanger as an embodiment according to the invention. and
Fig. 2 einen Längsschnitt durch die Ausführungsform nach der Erfindung, jedoch ohne drehangetriebene Welle und Schabemesser.Fig. 2 shows a longitudinal section through the embodiment according to the invention, but without a rotationally driven shaft and scraper.
Die Wärmetauscher dienen dem Erhitzen oder Kühlen unterschiedlicher Stoffe, vorzugsweise aber von Nahrungsmitteln. Hierbei handelt es sich beispielsweise um Margarine, Mayonnaise und Stärke. Auch Cremes und Salben werden behandelt.The heat exchangers are used to heat or cool different substances, but preferably food. For example, margarine, mayonnaise and starch. Creams and ointments are also treated.
Bei der dargestellten Ausführungsform werden, insbesondere zur ther- moelektrischen Kühlung, so genannte Peltierelemente 5 eingesetzt. Der Peltiereffekt beruht darauf, dass bei einem von Strom durchflossenen Zweileiterkreis eines Thermoelementes eine Lötstelle abgekühlt und die andere erwärmt wird. Der elektrische Strom erzeugt also bei ursprüng- lieh einheitlicher Temperatur des Leiterkreises ein Temperaturgefälle zwischen den Lötstellen. Diesen Effekt macht sich die Erfindung zu Nutze, um auf der Sekundärseite des Produktzylinders 3, also auf der Seite, die dem ringförmigen Spaltraum 10 abliegt, die Wärme abzuführen.In the embodiment shown, so-called Peltier elements 5 are used, in particular for thermoelectric cooling. The Peltier effect is based on the fact that in a two-wire circuit of a thermocouple through which current flows, one solder joint is cooled and the other is heated. The electrical current thus creates a temperature gradient between the soldering points at the originally uniform temperature of the conductor circuit. The invention makes use of this effect in order to dissipate the heat on the secondary side of the product cylinder 3, that is to say on the side lying away from the annular gap space 10.
Grundsätzlich ist die Erfindung zum Kühlen oder zum Erwärmen einsetzbar. Im Folgenden wird als Beispiel der in der Zeichnung dargestellte Schαbewärmetαuscher zum Kühlen einer zu behandelnden Masse beschrieben.Basically, the invention can be used for cooling or for heating. The following is an example of that shown in the drawing Schαbewärmetαuscher described for cooling a mass to be treated.
Die zu behandelnde Masse wird durch einen ringförmigen Spaltraum 10 zwischen einer drehangetriebenen Welle 2 und einem Produktzylinder 3 gepumpt. Schabemesser 1 , die an der Welle 2 befestigt sind, schaben das zu behandelnde Produkt von der Innenwand des Produktzylinders 3 ab und sorgen so für eine Umwälzung und für einen entsprechend verbesserten Wärmeübergang.The mass to be treated is pumped through an annular gap 10 between a rotary shaft 2 and a product cylinder 3. Scraper knives 1, which are attached to the shaft 2, scrape off the product to be treated from the inner wall of the product cylinder 3 and thus ensure circulation and a correspondingly improved heat transfer.
Auf der Außenseite des Produktzylinders 3 ist eine Anzahl von Peltierelementen 5 angeordnet, die grundsätzlich in Reihe oder parallel geschaltet werden können. Die elektrischen Zuleitungen verlaufen durch Spalte 4 und bei 12 in Fig. 2 nach außen. Die Peltierelemente 5 sind durch einen äußeren Mantel 6 aus wärmeleitföhigem Material, beispielsweise Kupferblech abgedeckt und geschützt. Diese Einheit aus Peltierelementen 5 und äußerem Mantel 6 liegt in einem äußeren Zylinder 8, der von dem Wärmeträgermedium durchspült wird. Dieses Wärmeträgermedium tritt bei 14 ein und bei 15 aus. Der Ringspalt, in dem die Einheit aus Peltierelementen 5 und wärmeleitföhigem Mantel 6 liegt, ist mit 7 bezeichnet. Dichtungen 9 dichten diesen Raum, in dem die Peltierelemente 5 liegen, an den Stirnseiten ab. Der Ringspalt 7 wird durch eine Dichtung 16 gegen den Produktzylinder 3 abgedichtet. Auf der anderen Seite befindet sich ein Flansch 13, der mit einer Dichtung 1 1 für eine Abdichtung gegen einen entsprechenden Flansch des äußeren Zylinders 8 sorgt.A number of Peltier elements 5 are arranged on the outside of the product cylinder 3 and can in principle be connected in series or in parallel. The electrical leads run through column 4 and at 12 in Fig. 2 to the outside. The Peltier elements 5 are covered and protected by an outer jacket 6 made of thermally conductive material, for example copper sheet. This unit consisting of Peltier elements 5 and outer jacket 6 is located in an outer cylinder 8, which is flushed through by the heat transfer medium. This heat transfer medium enters at 14 and exits at 15. The annular gap in which the unit consisting of Peltier elements 5 and thermally conductive jacket 6 is located is designated by 7. Seals 9 seal this space, in which the Peltier elements 5 lie, on the end faces. The annular gap 7 is sealed against the product cylinder 3 by a seal 16. On the other side there is a flange 13 which provides a seal 1 1 for sealing against a corresponding flange of the outer cylinder 8.
Im Betrieb wird die zu behandelnde Masse durch den ringförmigen Spaltraum 10 zwischen dem Produktzylinder 3 und der Welle 2 ge- pumpt. Die Peltierelemente 5 werden so von elektrischem Strom durchflössen, dass die bekannte Kühlwirkung eintritt. Die dabei entstehende Wärme auf der gegenüberliegenden vom Spaltraum 10 abgewandten Fläche des Peltierelementes 5 wird durch das Wärmeträgermedium in dem Ringspalt 7 abgeführt. Durch den Einsatz der Peltierelemente 5, die durch Steuerung des elektrischen Stromes reguliert werden können, ist eine Feinregulierung möglich.In operation, the mass to be treated is pumped through the annular gap space 10 between the product cylinder 3 and the shaft 2. Electric current flows through the Peltier elements 5 in such a way that the known cooling effect occurs. The resulting heat on the opposite side facing away from the gap 10 The surface of the Peltier element 5 is discharged through the heat transfer medium in the annular gap 7. By using the Peltier elements 5, which can be regulated by controlling the electrical current, fine regulation is possible.
Die Peltierelemente 5 können auch als vollflächige Beschichtung anstelle einzelner Elemente eingesetzt werden. Hierdurch wird eine noch gleichmäßigere und lückenlosere Führung des Temperaturniveaus erzielt.The Peltier elements 5 can also be used as a full-surface coating instead of individual elements. As a result, the temperature level is guided more evenly and without gaps.
Die Peltierelemente 5 können auch ohne wärmeleitende Kupferschutzfolie 6 eingesetzt werden sofern diese aus korrosionsfesten Materialien hergestellt sind bzw. mit solchen versehen sind.The Peltier elements 5 can also be used without a heat-conducting copper protective film 6 provided that they are made of corrosion-resistant materials or are provided with such materials.
Der Zylinder 10 kann auch vorteilhaft auf der den Peltierelementen zugewandten Seite axial verlaufenden planen Flächen anstelle zylindrischer Form ausgestaltet sein. Dieses Merkmal verschafft den Vorteil, dass planflächige Elemente aufgebracht werden können. The cylinder 10 can also be advantageously designed on the side facing the Peltier elements axially extending flat surfaces instead of a cylindrical shape. This feature has the advantage that flat elements can be applied.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Schαbemesser1 scraper
2 Welle2 wave
3 Produktzylinder3 product cylinders
4 Spalte4 column
5 Peltierelemente5 Peltier elements
6 Mantel6 coat
7 Ringspalt7 annular gap
8 Zylinder8 cylinders
9 Dichtungen9 seals
10 Spaltraum10 gap space
12 Durchführung nach außen12 Implementation to the outside
13 Flansch13 flange
14 Wärmeträgermediumeintritt14 heat transfer medium inlet
15 Wärmeträgermediumaustritt15 Heat transfer medium outlet
16 Dichtung 16 seal

Claims

Ansprüche Expectations
1. Schαbewärmetαuscher zum kontinuierlichen Erhitzen oder Kühlen von viskosen oder hochviskosen Massen mit einem Produktzylinder1. Schαbewärmetαuscher for the continuous heating or cooling of viscous or highly viscous masses with a product cylinder
(3), der von einem Wärmeträgermedium umgeben und in dem eine drehangetriebene Welle (2) angeordnet ist, die mit dem Produktzylinder (3) einen im Querschnitt ringförmigen Spaltraum (10) zur Aufnahme der zu behandelnden Masse bildet, dadurch ge- kennzeichnet, dass zwischen dem Warmeubertragungsmedium und dem Produktzylinder (3) auf seiner dem ringförmigen Spaltraum (10) abgelegenen Seite Peltierelemente (5) angeordnet sind.(3), which is surrounded by a heat transfer medium and in which a rotationally driven shaft (2) is arranged, which forms with the product cylinder (3) an annular cross section (10) for receiving the mass to be treated, characterized in that Peltier elements (5) are arranged between the heat transfer medium and the product cylinder (3) on its side remote from the annular gap space (10).
2. Schabewärmetauscher nach Anspruch 1 , dadurch gekennzeich- net, dass die Peltierelemente (5) als Wärmepumpen zur Kühlung oder durch Umkehrung der Spannungsversorgung an den Peltierelementen zur Eritzung der zu behandelnden Masse eingesetzt sind.2. Scraper heat exchanger according to claim 1, characterized in that the Peltier elements (5) are used as heat pumps for cooling or by reversing the voltage supply to the Peltier elements to heat the mass to be treated.
3. Schabewärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Peltierelemente (5) in einem von dem Wärme- Übertragungsmedium durchströmten Ringspalt (7) angeordnet sind, der durch den Produktzylinder (3) und einen diesen umgebenden äußeren Zylinder (8) gebildet ist.3. Scraper heat exchanger according to claim 1 or 2, characterized in that Peltier elements (5) are arranged in an annular gap (7) through which the heat transfer medium flows, which is formed by the product cylinder (3) and an outer cylinder (8) surrounding it ,
4. Schabewärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Peltierelemente (5) von einem Mantel (6) aus wärmeleitföhigem Material abgedeckt sind.4. scraping heat exchanger according to one of the preceding claims, characterized in that the Peltier elements (5) are covered by a jacket (6) made of thermally conductive material.
5. Schabewärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der gesamte Produktzylinder (3) als Peltierelement ausgeführt ist. 5. scraping heat exchanger according to one of the preceding claims, characterized in that the entire product cylinder (3) is designed as a Peltier element.
6. Schαbewärmetαuscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der gesamte Produktzylinder (3) auf der den Peltierelementen (5) zugewandten Seite in mehreren axialen planen Flächen ausgeführt ist zur Aufnahme von plan- flächig ausgeführten Peltierelementen.6. Schαbewärmetαuscher according to any one of the preceding claims, characterized in that the entire product cylinder (3) on the side facing the Peltier elements (5) is designed in several axial planar surfaces for receiving planar Peltier elements.
7. Schabewärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in dem ringförmigen Spaltraum (10) zur Aufnahme der zu behandelnden Masse Schabe- messer (1 ) an der drehangetriebenen Welle (2) befestigt sind, wobei die Schabemesser (1 ) die Oberfläche des Zylinders (3) berühren und abschaben. 7. scraping heat exchanger according to one of the preceding claims, characterized in that in the annular gap space (10) for receiving the mass to be treated scraping knife (1) on the rotary shaft (2) are attached, the scraping knife (1) the surface touch the cylinder (3) and scrape off.
PCT/DE2003/003910 2002-11-29 2003-11-25 Scraped surface heat exchanger WO2004051159A1 (en)

Priority Applications (3)

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DE10394115T DE10394115D2 (en) 2002-11-29 2003-11-25 Scraped
EP03767453A EP1565694A1 (en) 2002-11-29 2003-11-25 Scraped surface heat exchanger
AU2003291948A AU2003291948A1 (en) 2002-11-29 2003-11-25 Scraped surface heat exchanger

Applications Claiming Priority (2)

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DE10256069 2002-11-29
DE10256069.2 2002-11-29

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AU (1) AU2003291948A1 (en)
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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2236161C1 (en) * 2003-01-30 2004-09-20 Алиева Елена Антоновна Method for cooling of margarine emulsion in the process of producing the same
GB2443657A (en) * 2006-11-08 2008-05-14 4Energy Ltd Thermoelectric refrigerating device
GB2444979B (en) * 2006-12-19 2011-02-23 Diageo Great Britain Ltd A slush beverage machine
KR101023837B1 (en) * 2008-01-11 2011-03-22 주식회사 엘지화학 A Pressure-sensitive adhesive composition, A polarizer and A liquid crystal display comprising the same
CN105858066B (en) * 2016-05-30 2017-12-08 温岭市创嘉信息科技有限公司 The heat sink taken for food transport
US10293314B2 (en) 2016-08-02 2019-05-21 Dimitri Spiro Karatsinides Temperature controlled rotating apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175369A (en) * 1963-11-12 1965-03-30 Shirley D Murphy Ice making machine
US3225549A (en) * 1962-04-18 1965-12-28 Thore M Elfving Thermoelectric cooling device
US3232064A (en) * 1964-11-27 1966-02-01 Shirley D Murphy Thermoelectric ice making apparatus
US5419150A (en) * 1993-12-01 1995-05-30 Food Systems Partnership, Ltd. Freezer with inner core
EP0727634B1 (en) 1995-02-15 1998-07-29 Schröder GmbH & Co. KG Scraped surface heat exchanger
US6125635A (en) * 1997-12-08 2000-10-03 Seiko Seiki Kabushiki Kaisha Temperature adjusting device
US6236810B1 (en) * 1996-12-03 2001-05-22 Komatsu, Ltd. Fluid temperature control device
DE20307736U1 (en) * 2003-05-16 2003-09-25 Alieva Elena Antonovna Heat transfer plant cooling or heating industrial fluid, has cylindrical heat exchanger with rotary turbulence generator, thermopile assembly and further heat exchanger circuits

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801284A (en) * 1968-07-12 1974-04-02 M Meckler Peltier effect diffusion apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225549A (en) * 1962-04-18 1965-12-28 Thore M Elfving Thermoelectric cooling device
US3175369A (en) * 1963-11-12 1965-03-30 Shirley D Murphy Ice making machine
US3232064A (en) * 1964-11-27 1966-02-01 Shirley D Murphy Thermoelectric ice making apparatus
US5419150A (en) * 1993-12-01 1995-05-30 Food Systems Partnership, Ltd. Freezer with inner core
EP0727634B1 (en) 1995-02-15 1998-07-29 Schröder GmbH & Co. KG Scraped surface heat exchanger
US6236810B1 (en) * 1996-12-03 2001-05-22 Komatsu, Ltd. Fluid temperature control device
US6125635A (en) * 1997-12-08 2000-10-03 Seiko Seiki Kabushiki Kaisha Temperature adjusting device
DE20307736U1 (en) * 2003-05-16 2003-09-25 Alieva Elena Antonovna Heat transfer plant cooling or heating industrial fluid, has cylindrical heat exchanger with rotary turbulence generator, thermopile assembly and further heat exchanger circuits

Also Published As

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DE10394115D2 (en) 2005-10-20
EP1565694A1 (en) 2005-08-24
US20050204749A1 (en) 2005-09-22
DE10336203A1 (en) 2004-06-09
AU2003291948A1 (en) 2004-06-23

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