EP1272803B2 - Cooler and a method for cooling hot bulk material - Google Patents

Cooler and a method for cooling hot bulk material Download PDF

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Publication number
EP1272803B2
EP1272803B2 EP01929549A EP01929549A EP1272803B2 EP 1272803 B2 EP1272803 B2 EP 1272803B2 EP 01929549 A EP01929549 A EP 01929549A EP 01929549 A EP01929549 A EP 01929549A EP 1272803 B2 EP1272803 B2 EP 1272803B2
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European Patent Office
Prior art keywords
conveying elements
bulk material
transport direction
elements
conveying
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German (de)
French (fr)
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EP1272803B1 (en
EP1272803A1 (en
Inventor
Gerhard Kästingschäfer
Wolfgang Rother
Günter Milewski
Martin Uhde
Arthur Berger
Hermann Niemerg
Ludwig KÖNNING
Helmut Berief
Patrick Jean-Marc Brunelot
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ThyssenKrupp Industrial Solutions AG
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Polysius AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate

Definitions

  • the invention relates to a method for cooling hot bulk material according to the preamble of claim 1.
  • the bulk material For cooling of hot bulk material, such as cement clinker, the bulk material is placed on a cooling gas flow-through cooling grate. During transport from the beginning of the radiator to the radiator end, the bulk material is flowed through by cooling gas and thereby cooled.
  • the bulk material is transported by movable rows of cooling grates, which alternate with fixed cooling grate rows in the transport direction.
  • the hot bulk material is applied to a fixed ventilation bottom through which cooling gas can flow and transported by means of conveying elements which are movable to and fro above the aeration bottom.
  • the in the DE 878625 described conveying elements are formed by rods which are arranged above a fixed grate and extending in the longitudinal direction parallel to the grate level.
  • the rods are connected to a suitable movement mechanism, which allows a reciprocating movement in the transport direction of the bulk material.
  • suitable projections are provided on the rods to assist the conveying action.
  • conveying elements have been proposed with a substantially triangular cross-sectional shape, wherein the pointing in the direction of transport end face is formed substantially perpendicular to the transport direction and the rear end face forms an angle between 20 and 45 ° to the ventilation floor. While the forward vertical stroke the substantially vertical face achieves a good conveying effect, the conveying element can be withdrawn in the return stroke by its wedge shape under the bulk material, see, for example DE-4417422-A ,
  • the invention is therefore based on the object to improve the method according to the preamble of claim 1 with respect to the conveying effect.
  • the bulk material forms a relatively compact unit, which can be moved in the transport direction in the common forward stroke of the conveying elements.
  • the different groups of conveying elements are actuated individually and sequentially during the return stroke, due to the friction conditions in the good bed significantly less bulk is taken contrary to the transport direction, as in a common return stroke of all conveying elements.
  • Each group of conveying elements consists of at least one conveying element or conveying element strand.
  • the individual groups of conveying elements are provided alternately transversely to the transport direction of the bulk material.
  • the best results can be achieved.
  • the conveyor elements adjacent to the transport direction are arranged such that they are aligned to each phase of the movement sequence offset from each other in the transport direction.
  • the individual groups of conveying elements are arranged alternately in the transport direction of the bulk material.
  • cooler 1 for cooling hot bulk material 2 has substantially a fixed, can be flowed through by cooling gas ventilation floor 3 for receiving the bulk material and above the ventilation floor arranged, reciprocable conveying elements 4, 5, 6 for transporting the bulk material.
  • the bulk material 2 is formed for example by cement clinker, which is supplied from a rotary kiln 7 upstream of the cooler.
  • the bulk material passes through an oblique inlet region 8 on the fixed ventilation floor 3 and is transported there by means of the conveying elements 4, 5, 6 in the longitudinal direction through the radiator.
  • the ventilation floor is designed in a manner known per se and in particular has openings through which the cooling gas flows through the bulk material bed and thereby cools it.
  • the cooling air openings in the ventilation floor 3 are designed so that a sufficient amount of cooling air supplied, but rust diarrhea can be avoided.
  • the cooling air is expediently supplied below the ventilation floor 3.
  • the air ducts are not shown in detail for reasons of clarity.
  • the conveying elements are divided into at least two groups, wherein the at least two groups of conveying elements in the transport direction of the bulk material can be actuated separately from one another and counter to the transport direction.
  • the detailed design and the sequence of movement of the conveying elements in a first embodiment will be described below with reference to FIG Fig.2 and 3 explained in more detail.
  • three groups of conveying elements 4, 5, 6 are provided, which are alternately transversely to the transport direction of the bulk material (arrow 9 in FIG Fig.1 ) are arranged.
  • six conveying elements are provided across the width of the radiator 1, wherein the conveying elements 4.1 and 4.2 belong to the first group, the conveying elements 5.1 and 5.2 to the second group and the conveying elements 6.1 and 6.2 to the third group.
  • the conveying elements 4.1 and 4.2 belong to the first group
  • the conveying elements 5.1 and 5.2 to the second group
  • conveying elements 6.1 and 6.2 to the third group.
  • more or fewer conveying elements can be arranged over the width of the radiator.
  • Each conveying element 4.1 to 6.2 is connected via a carrier element 14.1 to 16.2 with suitable transport mechanisms 17.1 to 19.2.
  • 3 slots are provided in the ventilation floor through which the support elements 14.1 - 16.2 are passed.
  • the transport mechanisms which are associated with a specific group of conveying elements, can be coupled together for common adjustment of the conveying elements.
  • the reciprocating movement of the conveying elements is realized for example via a hydraulic drive.
  • 3a shows the state after the common forward stroke of all conveying elements 4.1 to 6.2. All conveying elements have been moved in the transport direction of the bulk material (arrow 9) by a length a. The bulk material lying on the ventilation floor and thus also on the conveyor elements is displaced in a corresponding manner.
  • conveying elements are arranged in the transport direction over the length of the radiator.
  • the conveying elements according to the first embodiment extend substantially in the longitudinal direction, ie in the transport direction of the bulk material (arrow 9).
  • the conveying elements differ from the first embodiment substantially in that they extend substantially transversely to the transport direction and are accordingly also supported via two carrier elements (for example 14.1) and connected to a transport mechanism (for example 17.1) or can be connected.
  • conveying elements according to the second embodiment in the basic position can be aligned transversely to the transport direction, as is the case in the first embodiment, in the second embodiment, adjacent conveying elements are arranged such that after each movement phase, i. after the common forward stroke and offset after each return stroke in the transport direction are aligned with each other.
  • the second embodiment can reduce the unwanted return transport of the bulk material during the return stroke of the conveying elements even better.
  • a third embodiment is shown, which differs from the preceding embodiments essentially in that only two groups of conveying elements are provided, which are also provided alternately in the transport direction 9 of the bulk material.
  • Each conveying element (for example 4.1) is connected via two carrier elements (14.1) to a transport mechanism (17.1). Conveniently, all conveyor elements of a group are moved via a common transport frame in the illustrated embodiment.
  • the stroke length of the conveyor elements should be designed to be adjustable.
  • the ventilation floor preferably extends horizontally, but also a downward slope would be conceivable.
  • the material of the conveyor elements must be selected according to the occurring temperature and the expected wear. For example, welding and casting constructions are possible. In the area of the bushings for the support elements also suitable seals must be provided in order to avoid rust diarrhea.
  • the embodiments described above are characterized in particular by the fact that the bulk material is not significantly carried along during the return stroke of the various groups of conveying elements. Accordingly, a smaller number of strokes is required for the movement of the bulk material, whereby in particular the wear of the conveying elements or the transport mechanism can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Chain Conveyers (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Jigging Conveyors (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Kühlen von heißem Schüttgut gemäß dem Gattungsbegriff des Anspruches 1.The invention relates to a method for cooling hot bulk material according to the preamble of claim 1.

Zur Kühlung von heißem Schüttgut, wie beispielsweise Zementklinker, wird das Schüttgut auf einem von Kühlgas durchströmbaren Kühlrost aufgegeben. Während des Transportes vom Kühleranfang zum Kühlerende wird das Schüttgut von Kühlgas durchströmt und dabei gekühlt.For cooling of hot bulk material, such as cement clinker, the bulk material is placed on a cooling gas flow-through cooling grate. During transport from the beginning of the radiator to the radiator end, the bulk material is flowed through by cooling gas and thereby cooled.

Für den Transport des Schüttgutes sind verschiedene Möglichkeiten bekannt. Beim sogenannten Schubrostkühler erfolgt der Transport des Schüttgutes durch bewegbare Kühlrostreihen, die sich in Transportrichtung mit feststehenden Kühlrostreihen abwechseln.Various possibilities are known for the transport of the bulk material. In the so-called sliding grate cooler, the bulk material is transported by movable rows of cooling grates, which alternate with fixed cooling grate rows in the transport direction.

Außerdem ist es bekannt, einen feststehenden von Kühlgas durchströmbaren Belüftungsboden zur Aufnahme des Schüttgutes vorzusehen, wobei oberhalb des Belüftungsbodens Förderelemente zum Transport des Schüttgutes vorgesehen sind. Beim Transportmechanismus unterscheidet man zwischen umlaufenden und hin- und herbeweglichen Förderelementen.In addition, it is known to provide a fixed aerated by cooling gas ventilation floor for receiving the bulk material, wherein above the ventilation floor conveyor elements are provided for transporting the bulk material. The transport mechanism distinguishes between circulating and reciprocating conveying elements.

Bei dem Verfahren gemäß WO 98/48231 A1 sowie DE 878625 wird des heiße Schüttgut auf einen feststehenden, von Kühlgas durchströmbaren Belüftungsboden aufgegeben und mittels oberhalb des Belüftungsbodens angeordneten, hin und her beweglichen Förderelementen transportiert. Die in der DE 878625 beschriebenen Förderelemente werden durch Stangen gebildet, die oberhalb eines feststehenden Rostes angeordnet sind und sich in Längsrichtung parallel zur Rostebene erstrecken. Die Stangen sind mit einem geeigneten Bewegungsmechanismus verbunden, der in Transportrichtung des Schüttgutes eine hin- und hergehende Bewegung ermöglicht. Zudem sind auf den Stangen geeignete Vorsprünge vorgesehen, um die Förderwirkung zu unterstützen.In the method according to WO 98/48231 A1 such as DE 878625 the hot bulk material is applied to a fixed ventilation bottom through which cooling gas can flow and transported by means of conveying elements which are movable to and fro above the aeration bottom. The in the DE 878625 described conveying elements are formed by rods which are arranged above a fixed grate and extending in the longitudinal direction parallel to the grate level. The rods are connected to a suitable movement mechanism, which allows a reciprocating movement in the transport direction of the bulk material. In addition, suitable projections are provided on the rods to assist the conveying action.

Im Gegensatz zu den umlaufenden Förderelementen ergibt sich bei den hin- und herbeweglichen Förderelementen die Problematik, daß ein Teil des Schüttgutes beim Rückhub wieder mitgenommen wird. Diesen Nachteil kann man jedoch durch eine geeignete Ausbildung der Förderelemente teilweise ausgleichen. So wurden beispielsweise Förderelemente mit einer im wesentlichen dreieckförmigen Querschnittsform vorgeschlagen, wobei die in Transportrichtung weisende Stirnfläche im wesentlichen senkrecht zur Transportrichtung ausgebildet ist und die rückwärtige Stirnfläche einen Winkel zwischen 20 und 45° zum Belüftungsboden einschließt. Während beim Vorhub die im wesentlichen senkrechte Stirnfläche eine gute Förderwirkung erzielt, kann das Förderelement beim Rückhub durch seine Keilform unter dem Schüttgut zurückgezogen werden, siehe z.B. DE-4417422-A .In contrast to the revolving conveyor elements arises in the reciprocating conveyor elements, the problem that a portion of the bulk material is taken back during the return stroke. However, this disadvantage can be partially offset by a suitable design of the conveying elements. For example, conveying elements have been proposed with a substantially triangular cross-sectional shape, wherein the pointing in the direction of transport end face is formed substantially perpendicular to the transport direction and the rear end face forms an angle between 20 and 45 ° to the ventilation floor. While the forward vertical stroke the substantially vertical face achieves a good conveying effect, the conveying element can be withdrawn in the return stroke by its wedge shape under the bulk material, see, for example DE-4417422-A ,

Aber auch bei einer solchen Ausgestaltung der Förderelemente wird beim Rückhub ein Teil der Schüttgutmenge mitgenommen.But even with such an embodiment of the conveying elements, a portion of the bulk material is taken during the return stroke.

Der Erfindung liegt daher die Aufgabe zugrunde, das Verfahren gemäß dem Gattungsbegriff des Anspruches 1 hinsichtlich der Förderwirkung zu verbessern.The invention is therefore based on the object to improve the method according to the preamble of claim 1 with respect to the conveying effect.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst.According to the invention, this object is solved by the features of claim 1.

Weitere Ausgestaltungen der Erfindung sind Gegenstand des Unteranspruches.Further embodiments of the invention are the subject of the dependent claim.

Auf dem Gebiet der Fördertechnik sind bereits sogenannte "Pendelbodenförderer" bekannt, bei denen benachbarte, unabhängig voneinander bewegbare Längsförderelemente zur Gutförderung gemeinsam vorwärts und einzeln rückwärts bewegt werden (vgl. US-A 5156259 ). Die Förderelemente schließen hierbei unmittelbar aneinander an und bilden in ihrer Gesamtheit einen geschlossenen Förderboden, der die ganze Last des zu fördernden Gutes aufnimmt und keinen Gutdurchfall zulässt. Ein bevorzugtes Anwendungsgebiet derartiger Pendelbodenförderer sind Lastkraftwagen.In the field of conveyor technology, so-called "pendulum floor conveyors" are already known, in which adjacent, independently movable longitudinal conveyor elements are moved forward and individually backward for good promotion (see. US-A 5,156,259 ). The conveying elements in this case close directly to each other and form in their entirety a closed conveyor bottom, which receives the entire load of the material to be conveyed and does not allow Gutdurchfall. A preferred field of application of such pendulum bottom conveyors are trucks.

Insbesondere bei grobem Schüttgut bildet das Schüttgut eine relativ kompakte Einheit, die beim gemeinsamen Vorhub der Förderelemente in Transportrichtung bewegt werden kann. Indem die verschiedenen Gruppen von Förderelementen beim Rückhub einzeln und nacheinander betätigt werden, wird aufgrund der Reibverhältnisse im Gutbett erheblich weniger Schüttgut entgegen der Transportrichtung mitgenommen, als bei einem gemeinsamen Rückhub aller Förderelemente.Especially with coarse bulk material, the bulk material forms a relatively compact unit, which can be moved in the transport direction in the common forward stroke of the conveying elements. By the different groups of conveying elements are actuated individually and sequentially during the return stroke, due to the friction conditions in the good bed significantly less bulk is taken contrary to the transport direction, as in a common return stroke of all conveying elements.

Jede Gruppe von Förderelementen besteht aus wenigstens einem Förderelement oder Förderelementstrang.Each group of conveying elements consists of at least one conveying element or conveying element strand.

Im Rahmen der Erfindung ist es auch denkbar, daß die Förderelemente einer Gruppe individuell betätigt werden, so daß diese beispielsweise unterschiedlich schnell und unterschiedlich lange bzw. mit unterschiedlichem Hub betätigt werden.In the context of the invention, it is also conceivable that the conveying elements of a group are operated individually, so that they are operated, for example, different speeds and different lengths or with different stroke.

In einem ersten Ausführungsbeispiel sind die einzelnen Gruppen von Förderelementen abwechselnd quer zur Transportrichtung des Schüttguts vorgesehen. Bei den der Erfindung zugrundeliegenden Versuchen hat sich gezeigt, daß mit drei Gruppen von Förderelementen, die abwechselnd quer zur Transportrichtung des Schüttguts angeordnet sind, die besten Ergebnisse erzielt werden können.In a first embodiment, the individual groups of conveying elements are provided alternately transversely to the transport direction of the bulk material. In the experiments underlying the invention has been shown that with three groups of conveying elements, which are arranged alternately transversely to the transport direction of the bulk material, the best results can be achieved.

In einem zweiten Ausführungsbeispiel sind die quer zur Transportrichtung benachbarten Förderelemente derart angeordnet, daß sie zu jeder Phase des Bewegungsablaufs zueinander versetzt in Transportrichtung ausgerichtet sind.In a second embodiment, the conveyor elements adjacent to the transport direction are arranged such that they are aligned to each phase of the movement sequence offset from each other in the transport direction.

In einem dritten erfindungsgemäßen Ausführungsbeispiel sind die einzelnen Gruppen von Förderelementen abwechselnd in Transportrichtung des Schüttgutes angeordnet.In a third embodiment of the invention, the individual groups of conveying elements are arranged alternately in the transport direction of the bulk material.

Aufgrund der Reibverhältnisse im Bereich der seitlichen Begrenzungen des Kühlers oder aus verfahrenstechnischen Gründen kann es zweckmäßig sein, den Hub der Förderelemente über die Breite des Belüftungsbodens unterschiedlich lang auszubilden.Due to the friction conditions in the region of the lateral boundaries of the cooler or procedural reasons, it may be appropriate to the stroke of the conveying elements over the width of the Ventilation floor different lengths form.

Weitere Vorteile und Ausgestaltungen der Erfindung werden anhand der Beschreibung einiger Ausführungsbeispiele und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail with reference to the description of some embodiments and the drawings.

In der Zeichnung zeigen

Fig. 1
eine schematische Längsschnittdarstellung des Kühlers,
Fig.2
eine schematische Querschnittdarstellung gemäß einem ersten Ausführungsbeispiel der Förderelemente,
Fig.3a bis 3d
eine schematische Darstellung des Bewegungsablaufes in der Aufsicht des ersten Ausführungsbeispieles,
Fig.4
eine schematische Querschnittdarstellung gemäß einem zweiten Ausführungsbeispiel der Förderelemente,
Fig.5a bis 5d
eine schematische Darstellung des Bewegungsablaufes in der Aufsicht des zweiten Ausführungsbeispieles,
Fig.6
eine schematische Querschnittdarstellung gemäß einem dritten Ausführungsbeispiel der Förderelemente, und
Fig.7a bis 7c
eine schematische Darstellung des Bewegungsablaufes in der Aufsicht des dritten Ausführungsbeispieles.
In the drawing show
Fig. 1
a schematic longitudinal sectional view of the radiator,
Fig.2
a schematic cross-sectional view according to a first embodiment of the conveying elements,
3a to 3d
a schematic representation of the movement sequence in the plan view of the first embodiment,
Figure 4
a schematic cross-sectional view according to a second embodiment of the conveying elements,
5a to 5d
a schematic representation of the movement sequence in the plan view of the second embodiment,
Figure 6
a schematic cross-sectional view according to a third embodiment of the conveying elements, and
Fig.7a to 7c
a schematic representation of the sequence of movements in the supervision of the third embodiment.

Der in Fig. 1 dargestellte Kühler 1 zum Kühlen von heißem Schüttgut 2 weist im wesentlichen einen feststehenden, von Kühlgas durchströmbaren Belüftungsboden 3 zur Aufnahme des Schüttguts sowie oberhalb des Belüftungsbodens angeordnete, hin- und herbewegliche Förderelemente 4, 5, 6 zum Transport des Schüttguts auf. Das Schüttgut 2 wird beispielsweise durch Zementklinker gebildet, der aus einem dem Kühler vorgeschalteten Drehrohrofen 7 zugeführt wird. Das Schüttgut gelangt über einen schrägen Einlaufbereich 8 auf den feststehenden Belüftungsboden 3 und wird dort mittels der Förderelemente 4, 5, 6 in Längsrichtung durch den Kühler transportiert.The in Fig. 1 shown cooler 1 for cooling hot bulk material 2 has substantially a fixed, can be flowed through by cooling gas ventilation floor 3 for receiving the bulk material and above the ventilation floor arranged, reciprocable conveying elements 4, 5, 6 for transporting the bulk material. The bulk material 2 is formed for example by cement clinker, which is supplied from a rotary kiln 7 upstream of the cooler. The bulk material passes through an oblique inlet region 8 on the fixed ventilation floor 3 and is transported there by means of the conveying elements 4, 5, 6 in the longitudinal direction through the radiator.

Der Belüftungsboden ist in an sich bekannter Art und Weise ausgestaltet und weist insbesondere Öffnungen auf, durch die das Kühlgas das Schüttgutbett quer durchströmt und es dabei kühlt. Die Kühlluftöffnungen im Belüftungsboden 3 sind dabei so ausgestaltet, daß eine ausreichende Kühlluftmenge zugeführt, aber Rostdurchfall vermieden werden kann. Die Kühlluft wird dabei zweckmäßigerweise unterhalb des Belüftungsbodens 3 zugeführt. In den dargestellten Ausführungsbeispielen sind die Luftzuführungen jedoch aus Gründen der Übersichtlichkeit nicht näher dargestellt.The ventilation floor is designed in a manner known per se and in particular has openings through which the cooling gas flows through the bulk material bed and thereby cools it. The cooling air openings in the ventilation floor 3 are designed so that a sufficient amount of cooling air supplied, but rust diarrhea can be avoided. The cooling air is expediently supplied below the ventilation floor 3. However, in the illustrated embodiments, the air ducts are not shown in detail for reasons of clarity.

Die Förderelemente sind in wenigstens zwei Gruppen eingeteilt, wobei die wenigstens zwei Gruppen von Förderelementen in Transportrichtung des Schüttguts gemeinsam und entgegen der Transportrichtung getrennt voneinander betätigbar sind. Die nähere Ausgestaltung und der Bewegungsablauf der Förderelemente bei einem ersten Ausführungsbeispiel werden im folgenden anhand der Fig.2 und 3 näher erläutert.The conveying elements are divided into at least two groups, wherein the at least two groups of conveying elements in the transport direction of the bulk material can be actuated separately from one another and counter to the transport direction. The detailed design and the sequence of movement of the conveying elements in a first embodiment will be described below with reference to FIG Fig.2 and 3 explained in more detail.

In diesem ersten Ausführungsbeispiel sind drei Gruppen von Förderelementen 4, 5, 6 vorgesehen, die abwechselnd quer zur Transportrichtung des Schüttguts (Pfeil 9 in Fig.1) angeordnet sind. Im dargestellten Ausführungsbeispiel sind über die Breite des Kühlers 1 sechs Förderelemente vorgesehen, wobei die Förderelemente 4.1 und 4.2 zur ersten Gruppe, die Förderelemente 5.1 und 5.2 zur zweiten Gruppe und die Förderelemente 6.1 und 6.2 zur dritten Gruppe gehören. Selbstverständlich können im Rahmen der Erfindung auch mehr oder weniger Förderelemente über die Breite des Kühlers angeordnet werden.In this first embodiment, three groups of conveying elements 4, 5, 6 are provided, which are alternately transversely to the transport direction of the bulk material (arrow 9 in FIG Fig.1 ) are arranged. In the illustrated embodiment, six conveying elements are provided across the width of the radiator 1, wherein the conveying elements 4.1 and 4.2 belong to the first group, the conveying elements 5.1 and 5.2 to the second group and the conveying elements 6.1 and 6.2 to the third group. Of course, in the context of the invention, more or fewer conveying elements can be arranged over the width of the radiator.

Jedes, Förderelement 4.1 bis 6.2 ist über ein Trägerelement 14.1 bis 16.2 mit geeigneten Transportmechanismen 17.1 bis 19.2 verbunden. Im dargestellten Ausführungsbeispiel sind im Belüftungsboden 3 Schlitze vorgesehen, durch die die Trägerelemente 14.1 - 16.2 hindurchgeführt sind.Each conveying element 4.1 to 6.2 is connected via a carrier element 14.1 to 16.2 with suitable transport mechanisms 17.1 to 19.2. In the illustrated embodiment, 3 slots are provided in the ventilation floor through which the support elements 14.1 - 16.2 are passed.

Die Transportmechanismen, die einer bestimmten Gruppe von Förderelementen zugeordnet sind, können zur gemeinsamen Verstellung der Förderelemente miteinander gekoppelt werden. Die hin- und hergehende Bewegung der Förderelemente wird beispielsweise über einen hydraulischen Antrieb realisiert.The transport mechanisms, which are associated with a specific group of conveying elements, can be coupled together for common adjustment of the conveying elements. The reciprocating movement of the conveying elements is realized for example via a hydraulic drive.

Mit Hilfe der Fig.3a bis 3d wird im folgenden der Bewegungsablauf des ersten Ausführungsbeispieles näher erläutert. Fig.3a zeigt den Zustand nach dem gemeinsamen Vorhub aller Förderelemente 4.1 bis 6.2. Alle Förderelemente sind dabei in Transportrichtung des Schüttguts (Pfeil 9) um eine Länge a bewegt worden. Das auf dem Belüftungsboden und damit auch über den Förderelementen liegende Schüttgut wird dabei in entsprechender Weise verschoben.With the help of 3a to 3d the sequence of movements of the first embodiment will be explained in more detail below. 3a shows the state after the common forward stroke of all conveying elements 4.1 to 6.2. All conveying elements have been moved in the transport direction of the bulk material (arrow 9) by a length a. The bulk material lying on the ventilation floor and thus also on the conveyor elements is displaced in a corresponding manner.

Damit beim Rückhub der Förderelemente möglichst wenig Schüttgut wieder zurücktransportiert wird, werden die Förderelemente nur gruppenweise bzw. einzeln zurückgestellt. Fig.3b zeigt den Zustand nach dem Rückhub der Förderelemente 4.1 und 4.2, Fig.3c den Zustand nach dem weiteren Rückhub der Förderelemente 5.1 und 5.2, während in Fig.3d schließlich auch die letzte Gruppe mit den Förderelementen 6.1 und 6.2 zurückgestellt worden ist.So that as little as possible bulk material is transported back again during the return stroke of the conveying elements, the conveying elements are reset only in groups or individually. 3b shows the state after the return stroke of the conveying elements 4.1 and 4.2, 3 c the state after the further return stroke of the conveying elements 5.1 and 5.2, while in 3 d Finally, the last group has been reset with the conveying elements 6.1 and 6.2.

Wie insbesondere aus den Fig.1 und 3 zu ersehen ist, sind auch in Transportrichtung über die Länge des Kühlers mehrere Förderelemente angeordnet. Die Förderelemente gemäß dem ersten Ausführungsbeispiel (Fig.2 und 3) erstrecken sich im wesentlichen in Längsrichtung, d.h. in Transportrichtung des Schüttguts (Pfeil 9).As in particular from the Fig.1 and 3 can be seen, several conveying elements are arranged in the transport direction over the length of the radiator. The conveying elements according to the first embodiment ( Fig.2 and 3 ) extend substantially in the longitudinal direction, ie in the transport direction of the bulk material (arrow 9).

Im zweiten Ausführungsbeispiel gemäß den Fig.4 und 5 sind wieder quer zur Transportrichtung des Schüttgutes mehrere Gruppen von Förderelementen 4.1 bis 6.2 vorgesehen. Die Förderelemente unterscheiden sich vom ersten Ausführungsbeispiel im wesentlichen dadurch, daß sie sich im wesentlichen quer zur Transportrichtung erstrecken und dementsprechend auch über jeweils zwei Trägerelemente (beispielsweise 14.1) abgestützt und mit einem Transportmechanismus (beispielsweise 17.1) verbunden sind bzw. verbunden werden können.In the second embodiment according to the Figure 4 and 5 are again transverse to the transport direction of the Bulk material provided several groups of conveying elements 4.1 to 6.2. The conveying elements differ from the first embodiment substantially in that they extend substantially transversely to the transport direction and are accordingly also supported via two carrier elements (for example 14.1) and connected to a transport mechanism (for example 17.1) or can be connected.

Wenngleich die Förderelemente gemäß dem zweiten Ausführungsbeispiel in der Grundstellung quer zur Transportrichtung fluchtend ausgerichtet sein können, wie das im ersten Ausführungsbeispiel der Fall ist, sind im zweiten Ausführungsbeispiel benachbarte Förderelemente derart angeordnet, daß sie nach jeder Bewegungsphase, d.h. nach dem gemeinsamen Vorhub und nach jedem einzelnen Rückhub in Transportrichtung versetzt zueinander ausgerichtet sind.Although the conveying elements according to the second embodiment in the basic position can be aligned transversely to the transport direction, as is the case in the first embodiment, in the second embodiment, adjacent conveying elements are arranged such that after each movement phase, i. after the common forward stroke and offset after each return stroke in the transport direction are aligned with each other.

Aus den Fig.5a bis 5d ist die Anordnung der Förderelemente nach jeder Bewegungsphase dargestellt. Fig.5a zeigt wiederum den Zustand nach dem gemeinsamen Vorhub aller Förderelemente mit einer Hublänge a. Dabei ist zu erkennen, daß benachbarte Förderelemente (quer zur Transportrichtung 9) in Transportrichtung versetzt zueinander ausgerichtet sind. Nach dem ersten Rückhub der Förderelemente 4.1 und 4.2 der ersten Gruppe ergibt sich weiterhin eine versetzte Anordnung benachbarter Förderelemente. In Fig.5c sind auch die Förderelemente 5.1 und 5.2 der zweiten Gruppe und in Fig.5d die Förderelemente 6.1 und 6.2 der dritten Gruppe zurückgezogen worden.From the 5a to 5d the arrangement of the conveying elements is shown after each movement phase. 5a again shows the state after the common forward stroke of all conveying elements with a stroke length a. It can be seen that adjacent conveying elements (transversely to the transport direction 9) offset in the transport direction are aligned with each other. After the first return stroke of the conveying elements 4.1 and 4.2 of the first group further results in a staggered arrangement of adjacent conveying elements. In 5c are also the conveying elements 5.1 and 5.2 of the second group and in 5d the conveying elements 6.1 and 6.2 of the third group have been withdrawn.

Das zweite Ausführungsbeispiel kann den ungewollten Rücktransport des Schüttguts beim Rückhub der Förderelemente noch besser reduzieren.The second embodiment can reduce the unwanted return transport of the bulk material during the return stroke of the conveying elements even better.

In den Fig.6 und 7 ist ein drittes Ausführungsbeispiel dargestellt, das sich von den vorangegangenen Ausführungsbeispielen im wesentlichen dadurch unterscheidet, daß lediglich zwei Gruppen von Förderelementen vorgesehen sind, die zudem abwechselnd in Transportrichtung 9 des Schüttguts vorgesehen sind.In the Figure 6 and 7 a third embodiment is shown, which differs from the preceding embodiments essentially in that only two groups of conveying elements are provided, which are also provided alternately in the transport direction 9 of the bulk material.

In der Darstellung gemäß Fig.6 ist das vordere Förderelement 4.1 an seinen beiden Endbereichen abgebrochen, um das dahinterliegende Förderelement 5.1 sichtbar zu machen. Zur Verdeutlichung sind in den Fig.7a bis 7d lediglich drei Förderelemente 4.1, 4.2 und 4.3 und nur zwei Förderelemente 5.1 und 5.2 der zweiten Gruppe dargestellt.In the illustration according to Figure 6 is the front conveyor element 4.1 aborted at its two end portions to make visible the underlying conveyor element 5.1. To clarify are in the 7a to 7d, only three conveying elements 4.1, 4.2 and 4.3 and only two conveying elements 5.1 and 5.2 of the second group shown.

Jedes Förderelement (beispielsweise 4.1) ist über zwei Trägerelemente (14.1) mit einem Transportmechanismus (17.1) verbunden. Zweckmäßigerweise werden bei dem dargestellten Ausführungsbeispiel alle Förderelemente einer Gruppe über einen gemeinsamen Transportrahmen bewegt.Each conveying element (for example 4.1) is connected via two carrier elements (14.1) to a transport mechanism (17.1). Conveniently, all conveyor elements of a group are moved via a common transport frame in the illustrated embodiment.

Wie aus Fig.7a zu ersehen ist, erfolgt der Vorhub wiederum für beide Gruppen von Förderelementen gemeinsam mit einer Hublänge a. In Fig.7b ist der Zustand nach dem Rückhub der Förderelemente 4.1, 4.2 und 4.3 der ersten Gruppe dargestellt. Nach dem Rückhub der Förderelemente 5.1 und 5.2 der zweiten Gruppe ist wiederum der Ausgangszustand gemäß Fig.7c erreicht.How out 7a can be seen, the forward stroke is again for both groups of conveying elements together with a stroke length a. In Figure 7b is the state after the return stroke of the conveying elements 4.1, 4.2 and 4.3 of the first group shown. After the return stroke of the conveying elements 5.1 and 5.2 of the second group is again the initial state according to 7c reached.

Im Rahmen der Erfindung wäre es auch denkbar, bei dem ersten und zweiten Ausführungsbeispiel den Hub der quer zur Transportrichtung angeordneten Förderelemente unterschiedlich lang einzustellen. Dadurch können sich über die Breite des Belüftungsbodens ergebende Unterschiede im Gutbett ausgeglichen werden. So sind beispielsweise die Reibverhältnisse innerhalb des Schüttguts in der Mitte des Kühlers anders, als an den beiden Randbereichen. Auch könnte eine unterschiedliche Hublänge zur besseren Querverteilung des Gutes im Anfangsbereich des Kühlers ausgenutzt werden.In the context of the invention, it would also be conceivable to set the stroke of the conveyor elements arranged transversely to the transport direction differently in the first and second embodiments. This can be compensated over the width of the ventilation floor resulting differences in the good bed. For example, the friction conditions within the bulk material in the middle of the cooler are different than at the two edge regions. Also, a different stroke length could be exploited for better lateral distribution of the goods in the beginning of the radiator.

Zur besseren Anpassung der Hublänge an die Bedürfnisse des jeweiligen Kühlers sollte die Hublänge der Förderelemente einstellbar ausgestaltet sein.For better adaptation of the stroke length to the needs of the respective radiator, the stroke length of the conveyor elements should be designed to be adjustable.

Bei allen Ausführungsbeispielen kann man zweckmäßigerweise die Geschwindigkeit für den gemeinsamen Vorhub geringer wählen, als für die Rückbewegungen der einzelnen Gruppen.In all embodiments, it is expedient to choose the speed for the common feed stroke lower than for the return movements of the individual groups.

Der Belüftungsboden erstreckt sich vorzugsweise horizontal, wobei jedoch auch eine Abwärtsneigung denkbar wäre.The ventilation floor preferably extends horizontally, but also a downward slope would be conceivable.

Der Werkstoff der Förderelemente muß entsprechend der auftretenden Temperatur und dem zu erwartenden Verschleiß ausgewählt werden. Dabei kommen beispielsweise Schweiß- und Gußkonstruktionen in Betracht. Im Bereich der Durchführungen für die Trägerelemente sind zudem geeignete Abdichtungen vorzusehen, um einen Rostdurchfall zu vermeiden.The material of the conveyor elements must be selected according to the occurring temperature and the expected wear. For example, welding and casting constructions are possible. In the area of the bushings for the support elements also suitable seals must be provided in order to avoid rust diarrhea.

Die oben beschriebenen Ausführungsbeispiele zeichnen sich insbesondere dadurch aus, daß das Schüttgut beim Rückhub der verschiedenen Gruppen von Förderelementen nicht nennenswert mitgenommen wird. Dementsprechend ist für die Bewegung des Schüttgutes eine geringere Anzahl von Hüben erforderlich, wodurch insbesondere auch der Verschleiß der Förderelemente bzw. des Transportmechanismus verringert werden kann.The embodiments described above are characterized in particular by the fact that the bulk material is not significantly carried along during the return stroke of the various groups of conveying elements. Accordingly, a smaller number of strokes is required for the movement of the bulk material, whereby in particular the wear of the conveying elements or the transport mechanism can be reduced.

Claims (2)

  1. Method for cooling hot bulk material, the hot bulk material being deposited on a stationary ventilation floor, through which cooling gas can flow, and being transported by means of conveying elements which are arranged above the ventilation floor and which can be moved back and forth, characterised in that there are used at least two groups (4, 5, 6) of conveying elements which are actuated together in the transport direction and separately from each other counter to the transport direction.
  2. Method according to claim 1, characterised in that, after the common actuation of all the groups of conveying elements in the transport direction, only one group of conveying elements is actuated in each case counter to the transport direction until all the groups of conveying elements have been returned.
EP01929549A 2000-04-12 2001-04-11 Cooler and a method for cooling hot bulk material Expired - Lifetime EP1272803B2 (en)

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DE10018142 2000-04-12
DE10018142A DE10018142B4 (en) 2000-04-12 2000-04-12 Radiator and method for cooling hot bulk material
PCT/EP2001/004198 WO2001077600A1 (en) 2000-04-12 2001-04-11 Cooler and a method for cooling hot bulk material

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DE10018142A1 (en) 2001-10-18
WO2001077600A1 (en) 2001-10-18
CZ298001B6 (en) 2007-05-23
US20030126878A1 (en) 2003-07-10
JP4913974B2 (en) 2012-04-11
CA2403331C (en) 2009-09-22
CA2403331A1 (en) 2001-10-18
AU2001256285A1 (en) 2001-10-23
DK1272803T3 (en) 2006-01-30
EP1272803B1 (en) 2005-11-23
JP2003530537A (en) 2003-10-14
EP1272803A1 (en) 2003-01-08
ES2250396T5 (en) 2009-02-16
BR0109554B1 (en) 2010-02-23
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BR0109554A (en) 2003-06-03
DK1272803T4 (en) 2009-01-05
CN1294397C (en) 2007-01-10
ES2250396T3 (en) 2006-04-16
US6796141B2 (en) 2004-09-28
DE10018142B4 (en) 2011-01-20
CZ20023396A3 (en) 2003-08-13
MXPA02010037A (en) 2003-02-12
DE50108173D1 (en) 2005-12-29

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