DE2808592A1 - Sand tray seal for tunnel kiln trolley sides - has seal supply and draining system between preheating and firing zones - Google Patents

Sand tray seal for tunnel kiln trolley sides - has seal supply and draining system between preheating and firing zones

Info

Publication number
DE2808592A1
DE2808592A1 DE19782808592 DE2808592A DE2808592A1 DE 2808592 A1 DE2808592 A1 DE 2808592A1 DE 19782808592 DE19782808592 DE 19782808592 DE 2808592 A DE2808592 A DE 2808592A DE 2808592 A1 DE2808592 A1 DE 2808592A1
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DE
Germany
Prior art keywords
preheating
bulk material
seal
zone
sand
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.)
Withdrawn
Application number
DE19782808592
Other languages
German (de)
Inventor
Nichtnennung Beantragt
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.)
Buchtal GmbH
Original Assignee
Buchtal 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 Buchtal GmbH filed Critical Buchtal GmbH
Priority to DE19782808592 priority Critical patent/DE2808592A1/en
Publication of DE2808592A1 publication Critical patent/DE2808592A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00Subject matter not provided for in other groups of this subclass
    • F27D99/0073Seals
    • F27D99/0076Furnace car seals, i.e. seals used in continuous furnaces or kilns for preventing gas or heat exchange between heating chamber and the area comprising driving means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/26Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
    • F27B9/262Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers on or in trucks

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

The tunnel kiln has preheating, firing and cooling zones. Sealing sand trays are provided for sealing trolley underside against heat by trolley side plates immersed into sand trays. The side protection side plates are not adversely affected by heat. The sand trays are loaded in the preheating zone with readily sealing granular material. In the firing zone they are charged with granular material with lower sealing effect. In the transition region of both zones there is provided drainage for the granular material carried along from the preheating zone into the firing zone.

Description

Die Erfindung betrifft einen Tunnelofen, in dessen aus Vorwänn-,The invention relates to a tunnel furnace, in which from Vorwänn-,

Brenn- und Kühlzone bestehendem Ofenkanal an den Seitenwänden in Höhe der Räder der den Tunnelofen durchfahrenden Brennwagen mit Schüttgut gefüllte Sandrinnen vorgesehen sind, in die an den Brennwagenplattformen seitlich angeordnete, nach unten hängende Blechschürzen eintauchen und damit den oberen Teil des Ofenkanals gegen die unteren, die Fahrgestelle der Brennwagen aufnehmenden Teil abdichten.Firing and cooling zone existing furnace duct on the side walls at the same height the wheels of the kiln cars driving through the tunnel kiln are filled with sand channels are provided, in the laterally arranged on the kiln car platforms, according to Dip in the sheet metal aprons hanging below and with it the upper part of the furnace duct seal against the lower part that accommodates the chassis of the kiln car.

Im allgemeinen ist man bestrebt, diese Ãbdichtung möglichst vollkommen zu machen und man wählt deshalb auch entsprechend gut dichtendes Schüttgut, nicht zuletzt auch wegen des Wärmehaushalts des gesamten Tunnelofens, bei dem ja nicht nutzbar zu machende Abwärme weitgehend vermieden werden soll.In general, one strives to achieve this seal as perfectly as possible to make and one therefore chooses bulk material that seals well, not Finally, because of the heat balance of the entire tunnel kiln, which is not Waste heat to be made usable should be largely avoided.

Nun zeigt sich aber, daß es im Bereich der Brennzone sehr häufig zu einer starken warnbelastung der Abdichtschürzen katitt, so daß diese glühend werden und damit ihre Form verlieren. Nach einiger Zeit verzundern die Schürzen und müssen dann ersetzt werden.Now it turns out, however, that it is very frequent in the area of the burn zone a strong warning load of the sealing aprons katitt, so that they are glowing and thus lose their shape. After a while, the aprons will scale and have to then be replaced.

Aufgabe der Erfindung ist es, unter Aufrechterhaltung einer möglichst weitgehendsten Abdichtung des aberen Teiles des Ofenkanals gegen dessen unteren Teil eine Möglichkeit zu schaffen, diese Beeinträchtigung der Abdichtschürzen durch die Wärmeentwicklung in der Brennzone zu vermeiden.The object of the invention is, while maintaining a possible Most extensive sealing of the buten part of the furnace channel against its lower Part of creating a way to prevent this impairment of the sealing aprons to avoid the development of heat in the firing zone.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Sandrinnen in der Vorwärmzone mit gut dichtendem Schüttgut und in der Brennzone mit einem dagegen weniger dichtenden Schüttgut beschickt sind und daß im Ubergangsbereich der beiden Zonen eine Abführung für das aus der vorwärrnzone mitgeschleppte Schüttgut und eine Zuführung für das abdichtende Schüttgut der Brennzone vorgesehen sind.This object is achieved according to the invention in that the sand channels in the preheating zone with well-sealed bulk material and in the combustion zone with one against it less sealing bulk material are charged and that in the transition area of the two Zones a discharge for the bulk material carried along from the preheating zone and a Feed for the sealing bulk material of the combustion zone are provided.

Mit dieser Maßnahme wird erreicht, daß dort, wo im Ofenkanal vergleichsweise hohe Unterdrücke herrschen und damit die Gefahr des Eindringens von unerwünschter Falschluft besonders groß ist, dieses Eindringen mit Sicherheit verhindert wird, während dort, ein Wärmestau auftritt, dieser durch die Möqlichkeit des Eindringens geringer Mengen an Falschluft abgebaut und damit die Uberhitzung der Schürzen vermieden wird. Es hat sich gezeigt, daß es durch Wahl geeigneten Schüttgutes ohne weiteres möglich ist, in der Brennzone ein Eindringen von Falschluft in solchem Ausmaße, daß die Brennatmosphäre beeinträchtigt wird, verhindert werden kann, während gleichzeitig diese Falschluft ausreicht, um die Abdichtschürzen auf Temperaturwerte zu kühlen, bei denen ein Glühendwerden und eine daraus folgende Verformung und Verzunderung verhindert wird.With this measure it is achieved that where in the furnace channel comparatively high negative pressures prevail and thus the risk of undesired penetration If the air leakage is particularly large, this penetration is definitely prevented, while there, a build-up of heat occurs, this is due to the possibility of penetration reduced amounts of air leakage, thus avoiding overheating of the aprons will. It has been shown that it is easily by choosing suitable bulk material it is possible for false air to penetrate into the combustion zone to such an extent that that the firing atmosphere is impaired can be prevented while at the same time this false air is sufficient to cool the sealing aprons to temperature values, in which glowing and a consequent deformation and scaling is prevented.

Selbstverständlich hat man bereits versucht, die Ofenatmosphäre als solche durch gezielte Einführung von Falschluft unter geeigneter Wahl von Schüttgut in den Sandrinnen zu beeinflussen. Dies hat jedoch nichts mit dem der Erfindung zugrunde liegendem Prablem zutun, WD es darum geht, die Abdichtung möglichst optimal zu gestalten, gleichzeitig aber ein damit verbundenes Problem, nämlich die unerwünschte Aufheizung der Schürzen zu lösen.Of course, attempts have already been made to improve the furnace atmosphere as such through the targeted introduction of false air with a suitable choice of bulk material to influence in the sand gullies. However, this has nothing to do with that of the invention To do the underlying prablem, WD is about making the seal as optimal as possible to design, but at the same time an associated problem, namely the undesirable Heating up the aprons to solve.

Uhn ein Verschleppen der einen Art des Schüttgutes in die andere Art des Schüttgutes zu vermeiden, führt man zweckmaßig eine geeignete Trennung im Ubergangsbereich durch, beispielsweise in Form einer in die Rinne ragenden Bürste, durch die die abdichtende Blechschürze ohne weiteres hindurchschneiden kann, ohne daß die Gefahr des Mitschleppens größerer den an Schüttgut besteht. tkn die Abdichtung zu optimieren, können mehrerer solcher Bürsten hintereinander angeordnet sein. Die Abführung des in der Vorwännzone durch die abdichtenden Blechschürzen unweigerlich mitgeschleppten Schüttgutes erfolgt unter Aufrechterhaltung des Schüttgutpegels beispielsweise durch ein in die Sandrinne hochstehendes Abführungsrohr, dessen Oberkante somit den Pegel des Schüttgutes in diesem Bereich bestimmt. Die Zuführung des Schüttgutes für die Sandrinne in der Brennzone, das ja durch die Abdichtschürze ebenfalls ausgeschleppt wird, erfolgt in üblicher Weise durch einen an geeigneter Stelle angebrachten Einfülltrichter oder eine Schüttrinne.Uhn a transfer of one type of bulk material to the other To avoid the bulk material, it is expedient to carry out a suitable separation in the transition area by, for example, in the form of a brush protruding into the groove through which the sealing sheet metal apron can easily cut through without the danger of dragging larger bulk goods. tkn to optimize the sealing, several such brushes can be arranged one behind the other. The discharge of the inevitably dragged along in the prewinning zone by the sealing sheet metal aprons Bulk material is carried out while maintaining the bulk material level, for example by a discharge pipe protruding into the sand channel, the upper edge of which thus determines the level of the bulk material in this area is determined. The supply of bulk material for the Sand channel in the combustion zone, which is also dragged out through the sealing skirt is carried out in the usual way through a funnel attached at a suitable point or a chute.

Die Zeichnungen zeigen in Fig. 1 einen Teillängsschnitt durch einen Tunnelofen gemäß der Erfindung; Fig. 2 einen Querschnitt im Bereich der Schuttguteinführung; und in Fig. 3 einen ET.orizontalschnitt, der in seiner Erstreckung derjenigen nach Fig. 1 entspricht.The drawings show in Fig. 1 a partial longitudinal section through a Tunnel furnace according to the invention; 2 shows a cross section in the area of the introduction of the debris; and in Fig. 3 an ET.orizontalschnitt, which in its extension to those Fig. 1 corresponds.

Im Tunnelofenkanal 1 aHerden die Ofenwagen 2 in der in Fig. 3 angedeuteten Schubrichtung verschoben. Die Ofenwagen 2 weisen ein Fahrgestell mit Rädern 3 auf, mit deren Hilfe sie auf Schienen 4 in Tunnelofenkanal laufen können. Die Seitenwand 5 weist einen Einführungskanal 6 auf, durch den Schüttgut 7 in den Bereich der Sandrinne Pj eingeführt werden kann. X,n den Ofenwagen 2 sind Blechschürzen 9 angeordnet, die in das in der Sandrinne 8 befindliche Schüttgut eingreifen und dadurch den oberen Teil des Tunnelofens gegen den unteren, die Fahrgestelle der Brennwagen aufnehmenden Teil 10 abdichten. Bei 11 ist ein Einfülltrichter für das Schüttgut angedeutet, der mit hilfe einer Klappe 12 verschlossen werden kann. Aus Fig. 3 ist erkennbar, daß der Sandrinnenkanal ô' mit gut dichtendem, im vorliegenden Falle feinkörnigem Schüttgut beschickt ist, das durch die in ihm gleitenden Blechschürzen 9 teilweise mitgenommen wird und über die Rinne 13 weit abfließen kann. Bei 14 sind Bürsten angedeutet, die den Teil 8' der Sandrinne vom Teil 8" der Sandrinne trennt, in den über den Einfüllkanal 6 weniger gut dichtendes Schüttgut eingeführt werden kann. Das mitgeführte CBlt dichtende Schüttgut im Sandrinnenteil 8', das ueber das Auslaufrohr 13 ausgetragen wird, wird in geeigneter Weise gewonnen und zum Eingangsende des Abschnittes o' der Sandrinne zurückgeführt.In the tunnel kiln channel 1 aHerden the kiln cars 2 as indicated in FIG. 3 Shifted direction of thrust. The kiln cars 2 have a chassis with wheels 3, with the help of which they can walk on rails 4 in the tunnel kiln channel. The side wall 5 has an introduction channel 6 through which the bulk material 7 into the area of the sand channel Pj can be introduced. X, n the kiln car 2 are sheet metal aprons 9 arranged, which engage in the bulk material located in the sand channel 8 and thereby the upper Part of the tunnel kiln against the lower one, which accommodates the chassis of the kiln cars Seal part 10. At 11 a funnel for the bulk material is indicated, which can be closed with the help of a flap 12. From Fig. 3 it can be seen that the sand channel channel ô 'with good sealing, in the present case fine-grained Bulk material is charged, which through the sheet metal aprons 9 sliding in it partially is taken and can flow away through the channel 13. At 14 there are brushes indicated, which separates the part 8 'of the sand channel from part 8 "of the sand channel, in the bulk material which seals less well can be introduced via the filling channel 6. The entrained CBlt sealing bulk material in the sand channel part 8 ', that over the outlet pipe 13 is discharged, is won in a suitable manner and to the input end of the Section o 'returned to the sand channel.

Claims (4)

Tunnelofen Patentansprüche 1. Tunnelofen, in dessen aus Vorwarm-, Brenn- und Kühlzone bestehendem Ofenkanal an den Seitenwänden in Höhe der Räder der den Tunnelofen durchfahrenden Brennwagen mit Schüttgut gefüllte Sandrinnen vorgesehen sind, in die an den Brennwagenplatfformen seitlich angeordnete, nach unten hängende Blechschürzen eintauchen und damit den oberen Teil des Ofenkanals gegen den unteren, die Fahrgestelle der Brennwagen aufnehmenden Teil abdichten, dadurch g e k e n n z e i c h n e t , daß die Sandrinnen in der Vorwärmzone mit gut dichtendem Schüttgut und in der Brennzone mit einem dagegen weniger dichtenden Schüttgut beschickt sind und daß im Übergangsbereich der beiden Zonen eine Abführung für das aus der Vorwärmzane mitgeschleppte Schüttgut der Brennzone vorgesehen sind. Tunnel kiln Patent claims 1. Tunnel kiln, in which from preheating, Firing and cooling zone existing furnace duct on the side walls at the level of the wheels sand channels filled with bulk material are provided for the kiln car driving through the tunnel kiln are, in the laterally arranged on the Brennwagenplatfformen, hanging down Immerse the sheet metal aprons and thus the upper part of the furnace duct against the lower, Seal the chassis of the part receiving the Brennwagen, thereby g e n n notices that the sand channels in the preheating zone are sealed with bulk material and are charged in the combustion zone with a bulk material that is less tightly sealed and that in the transition area of the two zones there is a discharge for that from the preheating zone entrained bulk material of the combustion zone are provided. 2. Tunnelofen nach Anspruch 1, dadurch g e k e n n z e i c h -n e t , daß im Ubergangsbereich zwischen Zuführung des einen und Abführung des anderen Schüttgutes eine den Durchgang der Blechschürze erlaubende Trennwand vorgesehen ist.2. Tunnel furnace according to claim 1, characterized in that g e k e n n z e i c h -n e t that in the transition area between the supply of one and the discharge of the other Bulk goods provided a partition allowing the sheet metal apron to pass through is. 3. Tunnelofen nach Anspruch 2, dadurch g e k e n n z e i c h -n e t , daß die Trennwand aus weinigstens einer Bürste besteht.3. Tunnel furnace according to claim 2, characterized in that g e k e n n z e i c h -n e t that the partition consists of at least one brush. 4. Tunnelofen nach einem oder mehreren der vorhergehenden Ansprüche, dadurch g e k e n n z e i c h n e t , daß die Abführung aus wenigstens einem in die Sandrinne hochstehenden Uberlaufrohr besteht.4. tunnel furnace according to one or more of the preceding claims, in that the discharge from at least one in the sand gutter consists of upstanding overflow pipe.
DE19782808592 1978-02-28 1978-02-28 Sand tray seal for tunnel kiln trolley sides - has seal supply and draining system between preheating and firing zones Withdrawn DE2808592A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782808592 DE2808592A1 (en) 1978-02-28 1978-02-28 Sand tray seal for tunnel kiln trolley sides - has seal supply and draining system between preheating and firing zones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782808592 DE2808592A1 (en) 1978-02-28 1978-02-28 Sand tray seal for tunnel kiln trolley sides - has seal supply and draining system between preheating and firing zones

Publications (1)

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DE2808592A1 true DE2808592A1 (en) 1979-08-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036977A1 (en) * 1980-03-29 1981-10-07 Werner Strohmenger Tunnel-type furnace
CN102759271A (en) * 2011-04-28 2012-10-31 山东省冶金设计院股份有限公司 End part sealing method of sintering machine
CN104896923A (en) * 2014-03-05 2015-09-09 陈有福 Tunnel kiln airtight device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036977A1 (en) * 1980-03-29 1981-10-07 Werner Strohmenger Tunnel-type furnace
CN102759271A (en) * 2011-04-28 2012-10-31 山东省冶金设计院股份有限公司 End part sealing method of sintering machine
CN102759271B (en) * 2011-04-28 2014-12-10 山东省冶金设计院股份有限公司 End part sealing method of sintering machine
CN104896923A (en) * 2014-03-05 2015-09-09 陈有福 Tunnel kiln airtight device

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