EP0436140A1 - Process and apparatus for cooling a particulate material - Google Patents

Process and apparatus for cooling a particulate material Download PDF

Info

Publication number
EP0436140A1
EP0436140A1 EP90123424A EP90123424A EP0436140A1 EP 0436140 A1 EP0436140 A1 EP 0436140A1 EP 90123424 A EP90123424 A EP 90123424A EP 90123424 A EP90123424 A EP 90123424A EP 0436140 A1 EP0436140 A1 EP 0436140A1
Authority
EP
European Patent Office
Prior art keywords
baffle plate
cooling liquid
cooling
filler neck
carrying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90123424A
Other languages
German (de)
French (fr)
Other versions
EP0436140B1 (en
Inventor
Peter Schmidt
Franz Kretzschmar
Willi Kawaters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to AT90123424T priority Critical patent/ATE102701T1/en
Publication of EP0436140A1 publication Critical patent/EP0436140A1/en
Application granted granted Critical
Publication of EP0436140B1 publication Critical patent/EP0436140B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/14—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material moving by gravity, e.g. down a tube

Definitions

  • the invention relates to a method for cooling a powdery substance, which is filled as a powder jet through a nozzle into a container and sprayed with a cooling liquid for cooling, and a device for carrying out the method.
  • DE-OS 36 23 724 discloses a method and a device for producing fresh concrete using cement which is precooled by liquid nitrogen. The cement is cooled when the cement is fed into a storage silo. For this purpose, the liquid nitrogen is blown into the cement silo at the same time as the cement. The connections for cement and nitrogen are arranged adjacent in the upper silo area.
  • the invention has for its object to provide a method and an apparatus for cooling a powdery substance, which is filled as a powder jet through a nozzle in a container and sprayed with a cooling liquid for cooling, which meet the requirements described above, in particular an increased heat exchange ensure between the powdery substance and the cooling liquid.
  • This object is achieved in that the powder jet before contact with the cooling liquid introduced via a distribution device is dispersed by mechanical fittings over a larger cross section than the filler neck.
  • the essential feature of the invention is that a baffle plate is placed below the powder filler neck in the powder stream of the powder to be cooled. When hitting this baffle plate, the powder jet is torn, whereby the powder forms a finely distributed baffle flow and an effective contact surface for heat exchange with the coolant is achieved.
  • Another advantage is that the temperature distribution in the container is much more homogeneous than can be achieved according to the prior art. The above-mentioned sufficient cooling can also be achieved with a lower cooling liquid throughput, and it can also be far surpassed if necessary.
  • the invention can be applied to a wide variety of powdery substances.
  • One example is the cement mentioned above in the course of the production of concrete, which is of particular importance because of its widespread use in building construction and civil engineering.
  • the use of liquid nitrogen as a coolant is recommended, since nitrogen does not leave any residues, but evaporates and degasses 100 percent.
  • the invention can be used with the same success, for example in the production of milk powder and plastic granules, and in particular in the grinding of spices which, for. T. are very temperature sensitive, use.
  • a great advantage of the invention is that it can be easily installed in a conventional cooling device for powdery substances which are fed into a container.
  • the filler neck one
  • Such a conventional cooling device can be arranged decentrally or centrally in the upper container area in the container.
  • the decentralized arrangement is characterized by a flat baffle plate arranged obliquely below the outlet openings of the powder filler neck, which is attached to the powder filler neck with brackets at an angle between approximately 30 ° and approximately 75 ° to the direction of the powder fall.
  • a liquid distribution device in the form of a straight distribution screen provided on its underside with numerous outlet openings for the liquid coolant is attached in such a way that the coolant emerging from it sprinkles the impingement stream widely and thus brings about the desired cooling.
  • a blunt baffle cone with brackets is fastened to it below the powder filler neck, which is arranged centrally in the upper container area, in such a way that the axis of the filler neck points to the cone tip pointing upward.
  • the liquid nitrogen is added via a ring line provided on its underside with numerous outlet openings for the liquid coolant as a distribution rake to the truncated cone-shaped impingement flow of the powder which is formed by the cone.
  • the baffle plate is fastened to the powder filler neck with brackets.
  • a separate fastening of the baffle plate is also conceivable. It is essential for the described method that the powdery substance fed into the container from above through the powder filler neck hits the baffle plate mounted underneath the filler neck and that the powdery substance bouncing off it flows below the coolant distribution rake so that it flows through the outlet openings of the distribution rake Coolant sprayed onto the powdery substance produces an effective thermal contact with it. A particularly effective thermal contact results if the cross section of the sprayed impingement flow is enlarged compared to the cross section of the powder flow in the powder filler neck.
  • FIG. 1 shows a device for cooling a powdery substance (symbolized by arrows) in a decentralized arrangement.
  • Figure 1, I shows a side view
  • Figure 1, II a top view.
  • the powder to be cooled passes through a powder filler neck 1 into a container (not shown), where it hits a flat, obliquely positioned baffle plate 2a and bounces off it again.
  • the coolant flows from a feed line 3 into a straight distribution rake 4a, which has numerous outlet openings for the coolant on its underside, and is sprayed onto the baffle flow of the powder generated by the baffle plate 2a in order to achieve the desired cooling of the powder.
  • the baffle plate 2a is fastened to the powder filler neck 1 with brackets 5.
  • FIG. 2 shows an alternative form of arrangement of a device for cooling powdery substances, namely a central one, FIG. 2, I again representing the side view of FIG. 2, II (top view).
  • the same or comparable device parts are provided with the same reference numerals as in FIG. 1.
  • the powder (arrows) fed through the filler neck 1 into the container (not shown) meets the conical baffle plate 2b and is thereby widened to form a frustoconical baffle flow.
  • the coolant is fed via the feed line 3 into a ring line 4b provided on its underside with numerous outlet openings for the coolant, which serves as a distribution screen for spraying the coolant onto the impingement flow and thus achieves the necessary cooling.
  • the brackets 5 fix the impact cone 2b below the filler neck 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The invention relates to a process and an apparatus for cooling a pulverulent material by means of a cooling liquid during filling of a container with this material. The powder drops from the filling socket (1) onto a baffle plate (2a, 2b) and forms a finely distributed deflected flow, over which the cooling liquid is sprayed from a distribution grid (4a, 4b) provided on its underside with outlet openings. The baffle plate can consist either of a straight plate (2a) or an obtuse cone (2b). The configuration of the distributor grid for the cooling liquid is modified in accordance with the shape of the baffle plate. Liquid nitrogen is suitable as cooling liquid for many purposes. <IMAGE>

Description

Die Erfindung betrifft ein verfahren zur Kühlung einer pulverförmigen Substanz, die als Pulverstrahl durch einen Stutzen in einen Behälter gefüllt und zur Kühlung mit einer Kühlflüssigkeit besprüht wird, sowie eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for cooling a powdery substance, which is filled as a powder jet through a nozzle into a container and sprayed with a cooling liquid for cooling, and a device for carrying out the method.

Beim Befüllen eines Behälters mit einer pulverförmigen Substanz ist es mitunter erforderlich, diese beim Einfüllvorgang zu kühlen. Das ist insbesondere dann der Fall, wenn die eingespeiste pulverförmige Substanz einer exothermen Reaktion unterzogen werden soll, eine erhöhte Temperatur des Reaktionsproduktes aber unerwünscht bzw. unvorteilhaft ist. Stellvertretend für eine solche pulverförmige Substanz ist Zement zu nennen, der, mit Wasser vermischt, exotherm reagiert. Das führt im Beton vor allem bei größeren Bauwerken während der Abkühlungsphase zu einem erheblichen Temperaturgradienten, woraus am Bauwerk Zugspannungen entstehen (Betonwerk + Fertigteil-Technik, Heft 8/81, S. 507), die durch die oben erwähnte Kühlung vermindert werden können. Aus der DE-OS 36 23 724 sind ein Verfahren und eine Vorrichtung zum Herstellen von Frischbeton unter Verwendung von Zement, der durch flüssigen Stickstoff vorgekühlt wird, bekannt. Die Zementkühlung erfolgt bei der Einspeisung des Zementes in ein Vorratssilo. Hierzu wird der flüssige Stickstoff zugleich mit dem Zement in das Zementsilo eingeblasen. Die Anschlüsse für Zement und Stickstoff sind benachbart im oberen Silobereich angeordnet.When filling a container with a powdery substance, it is sometimes necessary to cool it during the filling process. This is particularly the case when the powdered substance that is fed in is to be subjected to an exothermic reaction, but an elevated temperature of the reaction product is undesirable or disadvantageous. A representative of such a powdery substance is cement, which, when mixed with water, reacts exothermically. This leads to a considerable temperature gradient in the concrete, especially in larger buildings, during the cooling phase, which results in tensile stresses on the building (concrete plant + precast technology, issue 8/81, p. 507), which can be reduced by the cooling mentioned above. DE-OS 36 23 724 discloses a method and a device for producing fresh concrete using cement which is precooled by liquid nitrogen. The cement is cooled when the cement is fed into a storage silo. For this purpose, the liquid nitrogen is blown into the cement silo at the same time as the cement. The connections for cement and nitrogen are arranged adjacent in the upper silo area.

Dieses bekannte Verfahren bringt jedoch den Nachteil mit sich, daß eine ausreichende Kühlung damit nicht erzielt werden kann: Denn der Zement tritt wasserstrahlförmig aus dem Einfüllstutzen aus. Das wasserähnliche Verhalten des Zements bewirkt, daß die Kontaktfläche für den erforderlichen Wärmeaustausch in keiner Weise genügt.However, this known method has the disadvantage that adequate cooling cannot be achieved with it: because the cement emerges from the filler neck in the form of a water jet. The water-like behavior of the cement means that the contact surface is in no way sufficient for the required heat exchange.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Kühlung einer pulverförmigen Substanz, die als Pulverstrahl durch einen Stutzen in einen Behälter gefüllt und zur Kühlung mit einer Kühlflüssigkeit besprüht wird, aufzuzeigen, welche die oben beschriebenen Anforderungen erfüllen, insbesondere einen erhöhten Wärmeaustausch zwischen der pulverförmigen Substanz und der Kuhlflüssigkeit gewährleisten.The invention has for its object to provide a method and an apparatus for cooling a powdery substance, which is filled as a powder jet through a nozzle in a container and sprayed with a cooling liquid for cooling, which meet the requirements described above, in particular an increased heat exchange ensure between the powdery substance and the cooling liquid.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Pulverstrahl vor dem Kontakt mit der über eine Verteilvorrichtung eingebrachten Kühlflüssigkeit durch mechanische Einbauten über einen gegenüber dem Einfüllstutzen größeren Querschnitt zerstreut wird.This object is achieved in that the powder jet before contact with the cooling liquid introduced via a distribution device is dispersed by mechanical fittings over a larger cross section than the filler neck.

Das wesentliche Merkmal der Erfindung liegt darin, daß ein Prallblech unterhalb des Pulvereinfüllstutzens in den Pulverstrom des zu kühlenden Pulvers gebracht wird. Beim Auftreffen auf dieses Prallblech wird der Pulverstrahl zerrissen, wodurch das Pulver einen fein verteilten Prallstrom bildet und man eine wirksame Kontaktfläche für den Wärmeaustausch mit der Kühlflüssigkeit erzielt. Als weiterer Vorteil stellt sich im Behälter eine wesentlich homogenere Temperaturverteilung ein, als sie nach dem Stand der Technik erreichbar ist. Die oben geforderte, ausreichende Kühlung läßt sich darüber hinaus mit einem geringeren Kühlflüssigkeitsdurchsatz erreichen, und sie kann bei Bedarf auch noch weit überboten werden.The essential feature of the invention is that a baffle plate is placed below the powder filler neck in the powder stream of the powder to be cooled. When hitting this baffle plate, the powder jet is torn, whereby the powder forms a finely distributed baffle flow and an effective contact surface for heat exchange with the coolant is achieved. Another advantage is that the temperature distribution in the container is much more homogeneous than can be achieved according to the prior art. The above-mentioned sufficient cooling can also be achieved with a lower cooling liquid throughput, and it can also be far surpassed if necessary.

Die Erfindung läßt sich auf die verschiedensten pulverförmigen Substanzen anwenden. Ein Beispiel ist der schon oben erwähnte Zement im Zuge der Herstellung von Beton, der wegen seines weitverbreiteten Einsatzes im Hoch- und Tiefbau eine besondere Bedeutung besitzt. Speziell im Zusammenhang mit der Kühlung von Zement empfiehlt sich die Verwendung von flüssigem Stickstoff als Kühlmittel, da Stickstoff keine Rückstände hinterläßt, sondern 100prozentig verdampft und ausgast. Die Erfindung läßt sich jedoch mit gleichem Erfolg auch beispielsweise bei der Herstellung von Milchpulver und Kunststoffgranulaten und insbesondere beim Mahlen von Gewürzen, die z. T. sehr temperaturempfindlich sind, einsetzen.The invention can be applied to a wide variety of powdery substances. One example is the cement mentioned above in the course of the production of concrete, which is of particular importance because of its widespread use in building construction and civil engineering. Especially in connection with the cooling of cement, the use of liquid nitrogen as a coolant is recommended, since nitrogen does not leave any residues, but evaporates and degasses 100 percent. However, the invention can be used with the same success, for example in the production of milk powder and plastic granules, and in particular in the grinding of spices which, for. T. are very temperature sensitive, use.

Ein großer Vorteil der Erfindung liegt darin, daß sie in eine herkömmliche Kühlvorrichtung für pulverförmige Substanzen, die in einen Behälter eingespeist werden, leicht eingebaut werden kann. Der Einfüllstutzen einer derartigen, herkömmlichen Kühlvorrichtung kann dabei in dem Behälter dezentral oder zentral im oberen Behälterbereich angeordnet sein.A great advantage of the invention is that it can be easily installed in a conventional cooling device for powdery substances which are fed into a container. The filler neck one Such a conventional cooling device can be arranged decentrally or centrally in the upper container area in the container.

So bestehen erfindungsgemäß zwei grundsätzliche Ausführungsmöglichkeiten für Verfahren und Vorrichtung:
Die dezentrale Anordnung ist durch ein unterhalb der Austrittsöffnungen des Pulvereinfüllstutzens schräg angeordnetes, ebenes Prallblech charakterisiert, das mit Halterungen am Pulvereinfüllstutzen unter einem Winkel zwischen ca. 30° und ca. 75° zur Fallrichtung des Pulvers befestigt ist. Durch den Aufprall auf dieses Prallblech weitet sich der Pulverstrom zu einem fein verteilten Prallstrom auf. Eine Flüssigkeitsverteileinrichtung in Form eines an seiner Unterseite mit zahlreichen Auslaßöffnungen für das flüssige Kühlmittel versehenen geraden Verteilrechens wird so angebracht, daß das aus ihm austretende Kühlmittel den Prallstrom breit besprüht und damit die erwünschte Kühlung bewirkt.According to the invention, there are two basic design options for the method and the device:
The decentralized arrangement is characterized by a flat baffle plate arranged obliquely below the outlet openings of the powder filler neck, which is attached to the powder filler neck with brackets at an angle between approximately 30 ° and approximately 75 ° to the direction of the powder fall. As a result of the impact on this baffle, the powder stream expands to a finely distributed baffle. A liquid distribution device in the form of a straight distribution screen provided on its underside with numerous outlet openings for the liquid coolant is attached in such a way that the coolant emerging from it sprinkles the impingement stream widely and thus brings about the desired cooling.

Bei der zentralen Anordnung wird erfindungsgemäß unterhalb des im oberen Behälterbereichs zentrisch angebrachten Pulvereinfüllstutzens an ihm ein stumpfer Prallkegel mit Halterungen befestigt, dergestalt, daß die Achse des Einfüllstutzens auf die nach oben gerichtete Kegelspitze zeigt. Der flüssige Stickstoff wird über eine an ihrer Unterseite mit zahlreichen Auslaßöffnungen für das flüssige Kühlmittel versehenen Ringleitung als Verteilrechen dem sich durch den Kegel ausbildenden, kegelstumpfförmigen Prallstrom des Pulvers zugegeben. Diese Anordnung einer zentrisch um den Einfüllstutzen angebrachten Ringleitung gewährleistet eine besonders effektive Abkühlung des Pulvers.In the central arrangement, according to the invention, a blunt baffle cone with brackets is fastened to it below the powder filler neck, which is arranged centrally in the upper container area, in such a way that the axis of the filler neck points to the cone tip pointing upward. The liquid nitrogen is added via a ring line provided on its underside with numerous outlet openings for the liquid coolant as a distribution rake to the truncated cone-shaped impingement flow of the powder which is formed by the cone. This arrangement of a ring line arranged centrally around the filler neck ensures particularly effective cooling of the powder.

Bei den Ausführungsmöglichkeiten wird erfindungsgemäß das Prallblech mit Halterungen am Pulvereinfüllstutzen befestigt. Denkbar ist aber auch eine getrennte Befestigung des Prallblechs. Wesentlich für das beschriebene Verfahren ist, daß die von oben durch den Pulvereinfüllstutzen in den Behälter eingespeiste pulverförmige Substanz vollkommen auf das unterhalb des Einfüllstutzens montierte Prallblech trifft und daß die von diesem abprallende pulverförmige Substanz so unterhalb des Kühlmittelverteilrechens vorbeiströmt, daß das durch die Austrittsöffnungen des Verteilrechens auf die pulverförmige Substanz gesprühte Kühlmittel zu dieser einen wirksamen Wärmekontakt herstellt. Ein besonders effektiver Wärmekontakt ergibt sich, wenn der Querschnitt des besprühten Prallstromes gegenüber dem Querschnitt des Pulverstromes im Pulvereinfüllstutzen vergrößert ist.According to the invention, the baffle plate is fastened to the powder filler neck with brackets. A separate fastening of the baffle plate is also conceivable. It is essential for the described method that the powdery substance fed into the container from above through the powder filler neck hits the baffle plate mounted underneath the filler neck and that the powdery substance bouncing off it flows below the coolant distribution rake so that it flows through the outlet openings of the distribution rake Coolant sprayed onto the powdery substance produces an effective thermal contact with it. A particularly effective thermal contact results if the cross section of the sprayed impingement flow is enlarged compared to the cross section of the powder flow in the powder filler neck.

Die Erfindung sei im folgenden anhand zweier schematisch dargestellter Ausführungsbeispiele erläutert.The invention is explained below with reference to two schematically illustrated exemplary embodiments.

Dabei zeigen

Fig. 1
eine Vorrichtung in dezentraler Anordnung mit einem ebenen, schräg angestellten Prallblech und
Fig. 2
eine Vorrichtung in zentraler Anordnung mit einem kegelstumpfförmigen Prallblech, wobei die Kegelspitze in Gegenrichtung zur Einfüllrichtung des eingespeisten Pulvers weist.
Show
Fig. 1
a device in a decentralized arrangement with a flat, inclined baffle and
Fig. 2
a device in a central arrangement with a frustoconical baffle plate, the cone tip pointing in the opposite direction to the filling direction of the powder fed.

In Figur 1 ist eine Vorrichtung zur Kühlung einer pulverförmigen Substanz (durch Pfeile symbolisiert) in dezentraler Anordnung dargestellt. Figur 1, I zeigt dabei eine Seitenansicht, Figur 1, II eine Aufsicht. Durch einen Pulvereinfüllstutzen 1 gelangt das zu kühlende Pulver in einen Behälter (nicht dargestellt), wo es auf ein ebenes, schräg angestelltes Prallblech 2a trifft und von diesem wieder abprallt. Die Kühlflüssigkeit gelangt aus einer Zuleitung 3 in einen geraden Verteilrechen 4a, der an seiner Unterseite zahlreiche Auslaßöffnungen für die Kühlflüssigkeit aufweist, und wird auf den durch das Prallblech 2a erzeugten Prallstrom des Pulvers gesprüht, um die erwünschte Kühlung des Pulvers zu erreichen. Das Prallblech 2a ist mit Halterungen 5 am Pulvereinfüllstutzen 1 befestigt.FIG. 1 shows a device for cooling a powdery substance (symbolized by arrows) in a decentralized arrangement. Figure 1, I shows a side view, Figure 1, II a top view. The powder to be cooled passes through a powder filler neck 1 into a container (not shown), where it hits a flat, obliquely positioned baffle plate 2a and bounces off it again. The coolant flows from a feed line 3 into a straight distribution rake 4a, which has numerous outlet openings for the coolant on its underside, and is sprayed onto the baffle flow of the powder generated by the baffle plate 2a in order to achieve the desired cooling of the powder. The baffle plate 2a is fastened to the powder filler neck 1 with brackets 5.

Figur 2 zeigt eine alternative Anordnungsform einer Vorrichtung zur Kühlung pulverförmiger Substanzen, nämlich eine zentrale, wobei Figur 2, I wiederum die Seitenansicht von Figur 2, II (Aufsicht) darstellt. Dabei sind gleiche oder vergleichbare Vorrichtungsteile mit den gleichen Bezugsziffern versehen wie in Figur 1. Das durch den Einfüllstutzen 1 in den nicht dargestellten Behälter eingespeiste Pulver (Pfeile) trifft auf das kegelförmige Prallblech 2b und wird dadurch zu einem kegelstumpfförmigen Prallstrom verbreitert. Die Kühlflüssigkeit wird über die Zuleitung 3 in eine an ihrer Unterseite mit zahlreichen Austrittsöffnungen für die Kühlflüssigkeit versehene Ringleitung 4b geleitet, die als Verteilrechen zum Aufsprühen der Kühlflüssigkeit auf den Prallstrom dient und so die nötige Kühlung erzielt. Die Halterungen 5 fixieren den Prallkegel 2b unterhalb des Einfüllstutzens 1.FIG. 2 shows an alternative form of arrangement of a device for cooling powdery substances, namely a central one, FIG. 2, I again representing the side view of FIG. 2, II (top view). The same or comparable device parts are provided with the same reference numerals as in FIG. 1. The powder (arrows) fed through the filler neck 1 into the container (not shown) meets the conical baffle plate 2b and is thereby widened to form a frustoconical baffle flow. The coolant is fed via the feed line 3 into a ring line 4b provided on its underside with numerous outlet openings for the coolant, which serves as a distribution screen for spraying the coolant onto the impingement flow and thus achieves the necessary cooling. The brackets 5 fix the impact cone 2b below the filler neck 1.

Claims (11)

Verfahren zur Kühlung einer pulverförmigen Substanz, die als Pulverstrahl durch einen Stutzen in einen Behälter gefüllt und zur Kühlung mit einer Kühlflüssigkeit besprüht wird, dadurch gekennzeichnet, daß der Pulverstrahl vor dem Kontakt mit der über eine Verteilvorrichtung eingebrachten Kühlflüssigkeit durch mechanische Einbauten über einen gegenüber dem Einfüllstutzen größeren Querschnitt zerstreut wird.Process for cooling a powdery substance which is filled as a powder jet through a nozzle into a container and sprayed with a cooling liquid for cooling, characterized in that the powder jet before contact with the cooling liquid introduced via a distribution device by mechanical installations via a vis-à-vis the filler neck larger cross section is scattered. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Pulverstrahl gegen ein Prallblech als mechanischem Einbau geführt wird.A method according to claim 1, characterized in that the powder jet is guided against a baffle plate as a mechanical installation. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Pulverstrahl gegen ein, bezogen auf die Einfüllrichtung, schräg angestelltes, ebenes Prallblech geführt wird, wonach er mit der Kühlflüssigkeit aus einem Verteilrechen besprüht wird.Method according to Claim 1 or 2, characterized in that the powder jet is directed against a flat baffle plate which is inclined with respect to the filling direction, after which it is sprayed with the cooling liquid from a distribution rake. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Pulverstrahl mittig auf ein kegeliges Prallblech geführt wird, wonach er durch die Kühlflüssigkeit aus einer Ringleitung als Verteilrechen besprüht wird.Method according to claim 1 or 2, characterized in that the powder jet is guided centrally onto a conical baffle plate, after which it is sprayed by the cooling liquid from a ring line as a distribution rake. Verfahren nach den vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß als Kühlflüssigkeit flüssiger Stickstoff eingesetzt wird.Method according to the preceding claims, characterized in that liquid nitrogen is used as the cooling liquid. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 mit einem Speicherbehälter für eine pulverförmige Substanz, der in seinem oberen Teil mit einem Einfüllstutzen für die pulverförmige Substanz und mit einer Verteilvorrichtung für eine Kühlflüssigkeit ausgestattet ist, dadurch gekennzeichnet, daß in einem Abstand vom Austrittsende des Einfüllstutzens (1) und in der Nähe der Austrittsöffnungen der Verteilvorrichtung für die Kühlflüssigkeit (4) ein Prallblech (2) angeordnet ist.Device for carrying out the method according to claim 1 with a storage container for a pulverulent substance, which is equipped in its upper part with a filler neck for the pulverulent substance and with a distribution device for a cooling liquid, characterized in that at a distance from the outlet end of the filler neck ( 1) and in the vicinity of the outlet openings of the distribution device for the cooling liquid (4) a baffle plate (2) is arranged. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 6, dadurch gekennzeichnet, daß das Prallblech (2a) eben geformt und schräg angeordnet ist.Device for carrying out the method according to claim 6, characterized in that the baffle plate (2a) is flat and is arranged obliquely. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 7, dadurch gekennzeichnet, daß das Prallblech (2b) die Form eines stumpfen Kegels besitzt und mit der Kegelspitze zum Einfüllstutzen zeigend, mittig unter diesem angeordnet ist.Device for carrying out the method according to claim 7, characterized in that the baffle plate (2b) has the shape of a blunt cone and is arranged with the cone tip pointing towards the filler neck, centrally below this. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 6 bis 8, dadurch gekennzeichnet, daß das Prallblech (2) mit Halterungen (5) am Einfüllstutzen (1) befestigt ist.Device for carrying out the method according to claims 6 to 8, characterized in that the baffle plate (2) is fastened to the filler neck (1) with brackets (5). Vorrichtung zur Durchführung des Verfahrens nach Anspruch 7, dadurch gekennzeichnet, daß die Verteilvorrichtung (4) für die Kühlflüssigkeit aus einem seitlich neben dem Prallblech angeordneten geraden Rechen (4a) besteht.Device for carrying out the method according to claim 7, characterized in that the distribution device (4) for the cooling liquid consists of a straight rake (4a) arranged laterally next to the baffle plate. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 8, dadurch gekennzeichnet, daß die Verteilvorrichtung (4) für die Kühlflüssigkeit aus einer symmetrisch zum Kegel angeordneten Ringleitung (4b) als Rechen besteht.Device for carrying out the method according to claim 8, characterized in that the distribution device (4) for the cooling liquid consists of a ring line (4b) arranged symmetrically to the cone as a rake.
EP90123424A 1989-12-14 1990-12-06 Process and apparatus for cooling a particulate material Expired - Lifetime EP0436140B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90123424T ATE102701T1 (en) 1989-12-14 1990-12-06 METHOD AND DEVICE FOR COOLING A POWDERED SUBSTANCE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941262 1989-12-14
DE3941262A DE3941262C1 (en) 1989-12-14 1989-12-14

Publications (2)

Publication Number Publication Date
EP0436140A1 true EP0436140A1 (en) 1991-07-10
EP0436140B1 EP0436140B1 (en) 1994-03-09

Family

ID=6395436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123424A Expired - Lifetime EP0436140B1 (en) 1989-12-14 1990-12-06 Process and apparatus for cooling a particulate material

Country Status (3)

Country Link
EP (1) EP0436140B1 (en)
AT (1) ATE102701T1 (en)
DE (2) DE3941262C1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040674A1 (en) 2006-10-04 2008-04-10 Messer Group Gmbh Method and device for the production of chilled fresh concrete
CN102774669A (en) * 2011-05-11 2012-11-14 贵州航天凯山特种车改装有限公司 Main air inlet pipe cooling device for powder and particle material transportation pneumatic discharge carriage
CN105775795A (en) * 2016-03-28 2016-07-20 重庆钢铁(集团)有限责任公司 Return mine spraying system capable of improving sintering granulation effect
AT522559A1 (en) * 2019-04-25 2020-11-15 Thomas Wallner Dipl Ing Fh Method of regulating the aggregate temperature in the manufacture of concrete
DE102021005339A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Process and device for the production of cooled fresh concrete
DE102021005340A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Device and method for the production of cooled fresh concrete
DE102021005338A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Device for the production of cooled fresh concrete

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100410613C (en) * 2001-07-05 2008-08-13 特诺颜料国际有限公司 Method for directly cooling fine-particle solid substances
DE102005037081A1 (en) * 2005-08-03 2007-02-08 Messer Group Gmbh Method and apparatus for cooling cement or cementitious powders
US20180252444A1 (en) * 2017-03-06 2018-09-06 Mandak Holdings, LLC Cooling system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727734A (en) * 1951-06-14 1955-12-20 Johnson Co C S Method of and apparatus for cooling concrete aggregates
US3330046A (en) * 1962-03-22 1967-07-11 Smidth & Co As F L Method and apparatus for exchanging heat between solid particles and gases
US3358976A (en) * 1965-03-15 1967-12-19 Conrad Y Siktberg Apparatus for heating concrete ingredients
FR2281815A1 (en) * 1974-08-14 1976-03-12 Messer Griesheim Gmbh Cooling process for concrete sections of bridges etc. - lowers temperature of unset concrete and prevents localised freeze phenomena
EP0013871A1 (en) * 1979-01-30 1980-08-06 VOEST-ALPINE Aktiengesellschaft Process and apparatus for cooling burnt material such as sinters or pellets
DE3316030A1 (en) * 1983-05-03 1984-11-08 Adolf 2720 Rotenburg Biere Method and device for moistening granular or powdered abrasive material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1911965A1 (en) * 1968-03-13 1969-11-06 Prerovske Strojirny Np Device for preheating powdery materials, in particular cement raw meal
DE3623724A1 (en) * 1986-07-14 1988-01-28 Held & Francke Bau Ag Process and device for producing fresh concrete using cement cooled with liquid nitrogen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727734A (en) * 1951-06-14 1955-12-20 Johnson Co C S Method of and apparatus for cooling concrete aggregates
US3330046A (en) * 1962-03-22 1967-07-11 Smidth & Co As F L Method and apparatus for exchanging heat between solid particles and gases
US3358976A (en) * 1965-03-15 1967-12-19 Conrad Y Siktberg Apparatus for heating concrete ingredients
FR2281815A1 (en) * 1974-08-14 1976-03-12 Messer Griesheim Gmbh Cooling process for concrete sections of bridges etc. - lowers temperature of unset concrete and prevents localised freeze phenomena
EP0013871A1 (en) * 1979-01-30 1980-08-06 VOEST-ALPINE Aktiengesellschaft Process and apparatus for cooling burnt material such as sinters or pellets
DE3316030A1 (en) * 1983-05-03 1984-11-08 Adolf 2720 Rotenburg Biere Method and device for moistening granular or powdered abrasive material

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040674A1 (en) 2006-10-04 2008-04-10 Messer Group Gmbh Method and device for the production of chilled fresh concrete
EP2077933B1 (en) * 2006-10-04 2012-02-01 Messer Group GmbH Method and device for the production of chilled fresh concrete
CN102774669A (en) * 2011-05-11 2012-11-14 贵州航天凯山特种车改装有限公司 Main air inlet pipe cooling device for powder and particle material transportation pneumatic discharge carriage
CN105775795A (en) * 2016-03-28 2016-07-20 重庆钢铁(集团)有限责任公司 Return mine spraying system capable of improving sintering granulation effect
CN105775795B (en) * 2016-03-28 2017-10-31 重庆钢铁(集团)有限责任公司 A kind of spray system of returning mine for lifting sintering granulating effect
AT522559A1 (en) * 2019-04-25 2020-11-15 Thomas Wallner Dipl Ing Fh Method of regulating the aggregate temperature in the manufacture of concrete
AT522559B1 (en) * 2019-04-25 2022-10-15 Thomas Wallner Dipl Ing Fh Method of controlling aggregate temperature in making concrete
DE102021005339A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Process and device for the production of cooled fresh concrete
DE102021005340A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Device and method for the production of cooled fresh concrete
DE102021005338A1 (en) 2021-10-27 2023-04-27 Messer Austria Gmbh Device for the production of cooled fresh concrete
EP4173791A1 (en) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Apparatus and method for producing cooled fresh concrete
EP4173790A1 (en) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Device for producing cooled fresh concrete
EP4173789A1 (en) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Method and device for producing cooled fresh concrete

Also Published As

Publication number Publication date
ATE102701T1 (en) 1994-03-15
EP0436140B1 (en) 1994-03-09
DE3941262C1 (en) 1991-08-01
DE59004918D1 (en) 1994-04-14

Similar Documents

Publication Publication Date Title
DE1958610C3 (en) Method and device for disintegrating or atomizing a free-falling stream of liquid
DE19544353C2 (en) washer
DE3043428C2 (en) Process for the production of a granulate and device for carrying out the process
DE3941262C1 (en)
EP0007352A1 (en) Granular material from molten masses and process and apparatus for its manufacture.
DD223643A5 (en) PROCESS FOR THE PRODUCTION OF COALS
EP0963786B1 (en) Gas phase fluidised bed reactor
EP0787682A1 (en) Process for the preparation of sodium percarbonate granules
DE2555715A1 (en) METHOD AND DEVICE FOR POWDER PRODUCTION BY SPRAYING A MOLTEN MATERIAL
EP0230964A2 (en) Powder application device
DE4010045C2 (en) Method and device for cooling a powdery substance
WO2008040674A1 (en) Method and device for the production of chilled fresh concrete
DD157701A5 (en) METHOD FOR THE PRODUCTION OF URINANT PRILLS
DD284083A5 (en) METHOD AND DEVICE FOR REPAIRING A FIRE-RESISTANT BODY
DE2835722C2 (en)
EP0007536B1 (en) Method and device for granulating a metal melt so as to produce powder
DE2941833C2 (en) Device for the production of a vitreous blast furnace slag
DE3940766A1 (en) METHOD FOR CUTTING MATERIALS
DE2227306A1 (en) Powdered paraffin wax, manufacturing method and apparatus
DE3731150C2 (en) Method and apparatus for granulating sulfur
DE2543721C3 (en) Process for obtaining anhydrous sodium sulfate from Glauber&#39;s salt
DE1263707B (en) Granulation process
AT337222B (en) DEVICE FOR PELLETIZING MOLTEN MATERIAL, IN PARTICULAR BOTTOM FURNACE SLAG
DE3104062A1 (en) &#34;METHOD FOR MIXING A BLEND OF PULVERIZED INGREDIENTS AND DEVICE FOR CARRYING OUT THE METHOD&#34;
DE1792206A1 (en) Vortex reactor for the granulation of melts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR IT NL

17P Request for examination filed

Effective date: 19910903

17Q First examination report despatched

Effective date: 19920710

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR IT NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940309

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940309

REF Corresponds to:

Ref document number: 102701

Country of ref document: AT

Date of ref document: 19940315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59004918

Country of ref document: DE

Date of ref document: 19940414

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19941206

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19951212

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970829

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981216

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051206