EP0937958B1 - Process and installation for cooling under the wagon and heat utilisation in a tunnel furnace - Google Patents

Process and installation for cooling under the wagon and heat utilisation in a tunnel furnace Download PDF

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Publication number
EP0937958B1
EP0937958B1 EP99102685A EP99102685A EP0937958B1 EP 0937958 B1 EP0937958 B1 EP 0937958B1 EP 99102685 A EP99102685 A EP 99102685A EP 99102685 A EP99102685 A EP 99102685A EP 0937958 B1 EP0937958 B1 EP 0937958B1
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EP
European Patent Office
Prior art keywords
cooling
air
kiln
region
hot air
Prior art date
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Expired - Lifetime
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EP99102685A
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German (de)
French (fr)
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EP0937958A1 (en
Inventor
Gerold Krimpenfort
Helmut Lindemann
Thomas Trepte
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Keller HCW GmbH
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Keller HCW GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces 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
    • F27B9/20—Furnaces 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
    • F27B9/26—Furnaces 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
    • F27B9/262—Furnaces 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2009/3066—Cooling the under-structure of the kiln, e.g. under the cars

Definitions

  • the invention relates to a method according to the preamble of patent claim 1 and a tunnel kiln system to carry out the process.
  • the generic method and generic tunnel kiln systems are also in practice in various brickworks (for masonry bricks, facing bricks, Roof tiles, slabs and. Like.) became known.
  • the wheels and the chassis of the kiln cars together, i.e. with cooling air at the same temperature charged and cooled.
  • a relatively large amount of air is required because the temperature in the Undercarriage space due to the wheel bearings which are only weakly thermally stable may be relatively low (should not exceed 120 ° C) and from Chassis (chassis) a large amount of heat is to be removed.
  • Chassis Chassis
  • the relatively low exhaust air temperature leaves an economical Warm air use in a downstream dryer hardly increases, i.e. it will at the use of warm air from the undercarriage cooling for dryers additional heating may be necessary or useful.
  • the invention is therefore based on the object of the generic method as well as a tunnel kiln installation required for its implementation to improve in terms of energy and, on the one hand, a gentle wheel bearing arrangement and on the other hand a high heat recovery from the cooling process to ensure the undercarriage cooling.
  • the essential difference between the prior art and the invention lies in the separation of the cooling measures for the wheel bearings on the one hand and the cooling measures for the kiln car chassis on the other hand. Consequently can be any cooling area according to the requirements with cooling air be supplied.
  • the series connection of is particularly advantageous Wheel bearing cooling and chassis cooling because of the low air volume movement a high temperature reduction on the chassis parts is possible and the warm air generated has a relatively high temperature - thereby an economical use of the warm air generated by the undercarriage cooling is possible in a dryer.
  • the furnace areas to be cooled are in Sections divided - for example two to four sections (depending on the length of the Tunnel kiln).
  • a section can be about 30 m long.
  • the single ones Sections can be separated from one another by means of seals, chicanes or the like. The shows the advantage that a simple and easy to carry out adaptation to local conditions depending on the respective "firing curve" possible is by the cooling air supply in the respective undercarriage cooling system is changed (adjusted) in terms of quantity and / or temperature.
  • Chassis cooling only over part of the length of the tunnel furnace, especially in the Range of about 600 - 700 ° C in the entrance half of the tunnel and up to about 550 - 500 ° C in the exit side of the tunnel.
  • the Wheel and chassis cooling according to the invention thus extends over a Part of the heating zone, the firing zone area and the Rapid cooling zone area.
  • the targeted two-stage undercarriage cooling ineffective in kiln car 4 at least two cooling zones one behind the other in the longitudinal direction of the tunnel, which are separately supplied with cooling air (ambient air) and the Remove warm air separately.
  • An advantageous tunnel kiln system provides that in each undercarriage cooling system I, II the cooling air at the exit end of the system fed and the warm air is discharged at the entrance end of the system. there can the air used for cooling the chassis with max. 100 ° C in the car floor 14 enter and with max. Exit at 200 ° C. With such an air duct results that the cooling air in the wheel channels 10 heats up to about 50 - 70 ° C and heated in the double-walled car floors 14 to about 150 - 200 ° C.
  • the cooling air flows in the car floors 14 in the longitudinal direction of the tunnel oven and then distribute in Transverse direction. It flows in the carriage floors 14 in transverse Cooling channels 20 and escapes through bottom openings 22 in the warm air discharge channels 23.24.
  • Fig. 1 From Fig. 1 it can be seen that in the longitudinal direction of the tunnel oven at least two self-sufficient cooling zones, so-called Undercarriage cooling systems I, II one behind the other are arranged and in each undercarriage cooling system I, II am the cooling air main line 7 on the exit-side system end and on the entry-side System end of the hot air main line 25 are arranged.
  • Undercarriage cooling systems I, II one behind the other are arranged and in each undercarriage cooling system I, II am the cooling air main line 7 on the exit-side system end and on the entry-side System end of the hot air main line 25 are arranged.
  • the transverse main lines 7, 25 for the cooling air supply and Warm air discharge is arranged below the tunnel furnace floor 2.
  • the cooling air main line 7 is provided with a fan 8.
  • the hot air manifold 27 is preferably connected to a dryer.
  • the car floor 14 is provided with air channels 20 provided, which cross-sectionally from transverse to the thrust axis Carriers 18 of an insulating structure that supports and / or delimits the bottom Sheet metal wall 17 and a partially perforated end wall 19 are limited.

Abstract

The insulated structure of the trolleys divides the tunnel cross-section into a processing chamber and an under-trolley space. Air cooling beneath the trolleys is provided. The tunnel kiln in the under-trolley space (6), at least in the area used for cooling, is so divided that for each wheel track a wheel channel (10) with cooling air feed conduit (11) and next to it a warm air outlet channel (23,24) are provided. The cooling air conduits are connected to a cooling air main conduit (7) running crossways in the kiln body, through which atmospheric air can be blown into the under-trolley cooling system. The trolleys (4) have bases (14) with double walls through which air can flow. The base walls in the area of the wheel channels have cooling air inflow apertures (21) and in the other areas warm air outflow apertures (22).

Description

Die Erfindung betrifft ein Verfahren gemäß Oberbegriff des Patentanspruches 1 sowie eine Tunnelofen-Anlage zur Durchführung des Verfahrens.The invention relates to a method according to the preamble of patent claim 1 and a tunnel kiln system to carry out the process.

Ein solches Verfahren und eine solche Anlage, jedoch ohne Unternagenkühlung, sind beschreiben in FR-A- 373 118.Such a method and such an installation, but without cooling of the undertaking, are describe in FR-A-373 118.

Das gattungsgemäße Verfahren sowie gattungsgemäße Tunnelofen-Anlagen sind außerdem in der Praxis in verschiedenen Ziegeleien (für Mauerziegel, Verblendziegel, Dachziegel, Spaltplatten u. dgl.) bekannt geworden. Dabei werden die Räder und die Fahrgestelle der Ofenwagen gemeinsam, d.h. mit gleich temperierter Kühlluft beaufschlagt und gekühlt. Um die Abkühlung der Fahrgestell-Teile zu bewirken, bedarf es einer verhältnismäßig großen Luftmenge, weil die Temperatur im Unterwagenraum aufgrund der thermisch nur schwach belastbaren Radlager verhältnismäßig niedrig sein darf (120 °C nicht überschreiten sollte) und vom Fahrgestell (Chassis) eine große Wärmemenge abzutransportieren ist. Die verhältnismäßig niedrige Ablufttemperatur läßt eine wirtschaftliche Warmluftnutzung in einem nachgeschalteten Trockner kaum zu, d.h. es wird bei der Nutzung der aus der Unterwagenkühlung stammenden Warmluft für Trockner eine zusätzliche Aufheizung erforderlich bzw. sinnvoll sein.The generic method and generic tunnel kiln systems are also in practice in various brickworks (for masonry bricks, facing bricks, Roof tiles, slabs and. Like.) became known. The wheels and the chassis of the kiln cars together, i.e. with cooling air at the same temperature charged and cooled. In order to cool down the chassis parts, a relatively large amount of air is required because the temperature in the Undercarriage space due to the wheel bearings which are only weakly thermally stable may be relatively low (should not exceed 120 ° C) and from Chassis (chassis) a large amount of heat is to be removed. The relatively low exhaust air temperature leaves an economical Warm air use in a downstream dryer hardly increases, i.e. it will at the use of warm air from the undercarriage cooling for dryers additional heating may be necessary or useful.

Der Erfindung liegt daher die Aufgabe zugrunde, das gattungsgemäße Verfahren sowie eine zu dessen Durchführung erforderliche Tunnelofen-Anlage ernergiemäßig zu verbessern und dabei einerseits eine schonende Radlager-Anordnung und andererseits eine hohe Wärmeausbeutung aus dem Kühlprozeß der Unterwagenkühlung zu gewährleisten.The invention is therefore based on the object of the generic method as well as a tunnel kiln installation required for its implementation to improve in terms of energy and, on the one hand, a gentle wheel bearing arrangement and on the other hand a high heat recovery from the cooling process to ensure the undercarriage cooling.

Erfindungsgemäß wird dies durch ein Verfahren gemäß Patentanspruch 1 sowie eine Tunnelofen-Anlage gemäß Patentanspruch 10 gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen. According to the invention, this is achieved by a method according to claim 1 and a tunnel kiln system according to claim 10 solved. advantageous Further developments of the invention result from the subclaims.

Der wesentliche Unterschied zwischen dem Stand der Technik und der Erfindung liegt in der Trennung der Kühlungsmaßnahmen für die Radlager einerseits und der Kühlungsmaßnahmen für die Ofenwagen-Fahrgestelle andererseits. Somit kann jeder Kühlungsbereich entsprechend den Erfordernissen mit Kühlluft versorgt werden. Besonders vorteilhaft ist die Hintereinanderschaltung von Radlager-Kühlung und Chassis-Kühlung, weil dadurch mit geringer Luftmengen-Bewegung eine hohe Temperaturreduzierung an den Chassisteilen möglich ist und die erzeugte Warmluft eine verhältnismäßig hohe Temperatur hat - wodurch ein ökonomischer Einsatz der aus der Unterwagenkühlung anfallenden Warmluft in einem Trockner möglich ist.The essential difference between the prior art and the invention lies in the separation of the cooling measures for the wheel bearings on the one hand and the cooling measures for the kiln car chassis on the other hand. Consequently can be any cooling area according to the requirements with cooling air be supplied. The series connection of is particularly advantageous Wheel bearing cooling and chassis cooling because of the low air volume movement a high temperature reduction on the chassis parts is possible and the warm air generated has a relatively high temperature - thereby an economical use of the warm air generated by the undercarriage cooling is possible in a dryer.

Gemäß einer vorteilhaften Weiterbildung der Erfindung findet eine gezielte und durch ventilatorbeschleunigte Kühlluft-Zufuhr erzielte Kühlung nur der (d.h. solcher) Ofensektionen statt, in denen Kühlung erforderlich ist.According to an advantageous development of the invention, a targeted and cooling achieved by fan-accelerated cooling air supply only the (i.e. oven sections where cooling is required.

In bevorzugter und vorteilhafter Weise werden die zu kühlenden Ofenbereiche in Sektionen unterteilt - beispielsweise zwei bis vier Sektionen (je nach Länge des Tunnelofens). Dabei kann eine Sektion etwa 30 m lang sein. Die einzelnen Sektionen sind mittels Dichtungen, Schikanen od. dgl. voneinander trennbar. Das zeigt den Vorteil, daß eine einfache und leicht durchführbare Anpassung an die örtlichen Gegebenheiten in Abhängigkeit von der jeweiligen "Brennkurve" möglich ist, indem die Kühlluft-Zuführung ins jeweilige Unterwagenkühlsystem mengenmäßig und/oder temperaturmäßig verändert (angepaßt) wird. In a preferred and advantageous manner, the furnace areas to be cooled are in Sections divided - for example two to four sections (depending on the length of the Tunnel kiln). A section can be about 30 m long. The single ones Sections can be separated from one another by means of seals, chicanes or the like. The shows the advantage that a simple and easy to carry out adaptation to local conditions depending on the respective "firing curve" possible is by the cooling air supply in the respective undercarriage cooling system is changed (adjusted) in terms of quantity and / or temperature.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen

Fig. 1
eine Draufsicht auf einen Tunnelofen mit erfindungsgemäßen Unterwagenkühlsystemen sowie dazugehöriger Brennkurve,
Fig. 2
einen Querschnitt durch ein Unterwagenkühlsystem mit 2-spurigem Tunnelofenwagen und erfindungsgemäßer Kühlluft-Führung zur Unterwagenkühlung,
Fig.3
einen Ofenwagen-Längsschnitt und
Fig. 4
eine Draufsicht auf das Unterwagenkühlsystem eines 2-spurigen Ofenwagens.
In the drawing, an embodiment of the invention is shown. Show it
Fig. 1
a plan view of a tunnel kiln with undercarriage cooling systems according to the invention and the associated firing curve,
Fig. 2
2 shows a cross section through an undercarriage cooling system with a 2-lane tunnel kiln car and cooling air guide according to the invention for cooling the undercarriage,
Figure 3
a kiln car longitudinal section and
Fig. 4
a plan view of the undercarriage cooling system of a 2-lane kiln car.

In der zeichnerischen Darstellung und in den Ansprüchen werden folgende Bezugszahlen verwendet:

I
Unterwagenkühlsystem (einfahrtseitig)
II
Unterwagenkühlsystem (ausfahrtseitig)
1
Tunnelofen, mit Aufheiz-, Brenn- und Kühlzone, für Produkte der Baustoffindustrie, insbesondere Ziegelei-Produkte
2
Tunnelboden
3
Gleis
4
Ofenwagen
5
Behandlungsraum von 1 für das Brenngut
6
Unterwagenraum
7
im Ofenkörper/Tunnelboden querverlaufen (in bezug auf die Ofenlängsachse) angeordnete Kühlluft-Hauptleitung
8
Ventilator für 7
9
Kühlluft-Austrittsöffnung von 7
10
Radkanal
11
Kühlluft-Zuführleitung
12
Kühlluft-Austrittsöffnung von 11 zu 10
13
Isolieraufbau von 4
14
luftdurchströmbar doppelwandiger Wagenboden
15
Längsträger für 14 und Rad-Anordnung
16
Räder von 4
17
obere Tragwandung (sogen. Isolieraufbau-Bodenblech) von 14
18
Querträger innerhalb 14
19
bodenseitige Wandung von 14
20
quer zur Ofenlängsache verlaufende Kühlkanäle in 14
21
Kühlluft-Einströmöffnung von 10 zu 14
22
Warmluft-Ausströmöffnung von 14
23
Warmluft-Ableitkanal (mittig) innerhalb des Unterwagenraumes 6
24
Warmluft-Ableitkanal (seitlich) innerhalb des Unterwagenraumes 6
25
im Ofenkörper/Tunnelboden quer zur Ofenlängsachse angeordnete Warmluft-Abführung (sogen. Warmluft-Hauptleitung)
26
Warmluft-Absaugstelle
27
Warmluft-Sammelleitung, zu einem Verbraucher, insbesondere Trockner hinführend
Die Erfindung betrifft einerseits ein Verfahren zur Unterwagenkühlung in einem von Ofenwagen 4 durchfahrbaren Tunnelofen 1 zum Brennen von Produkten für die Baustoffindustrie und andererseits eine entsprechende Tunnelofen-Anlage, wobei jeweils ein isolierter Wagenaufbau den Tunnelofen-Querschnitt in einen das Brenngut aufnehmenden Behandlungsraum (mit Aufheiz-, Brenn- und Kühlzone) und einen Unterwagenraum 6 unterteilt und im Unterwagenkanal mit Hilfe von Luft eine Unterwagenkühlung durchgeführt wird.The following reference numbers are used in the drawing and in the claims:
I
Undercarriage cooling system (entrance side)
II
Undercarriage cooling system (exit side)
1
Tunnel kiln, with heating, burning and cooling zone, for products from the building materials industry, especially brick products
2
tunnel floor
3
track
4
kiln cars
5
Treatment room of 1 for the firing material
6
Undercarriage room
7
Cooling air main duct arranged transversely in the furnace body / tunnel floor (with respect to the longitudinal axis of the furnace)
8th
Fan for 7
9
Cooling air outlet opening of 7
10
Radkanal
11
Cooling air supply line
12
Cooling air outlet opening from 11 to 10
13
Isolation structure of 4
14
air-permeable double-walled car floor
15
Side members for 14 and wheel arrangement
16
Wheels of 4
17
upper supporting wall (so-called insulating floor plate) from 14
18
Cross member within 14
19
bottom wall of 14
20
Cooling channels running across the length of the furnace in 14
21
Cooling air inlet opening from 10 to 14
22
Hot air outflow opening of 14
23
Warm air discharge duct (in the middle) within the undercarriage room 6
24
Warm air discharge duct (on the side) within the undercarriage compartment 6
25
Warm air discharge (so-called warm air main line) arranged in the furnace body / tunnel floor transversely to the longitudinal axis of the furnace
26
Hot-air extraction point
27
Warm air manifold, leading to a consumer, especially dryer
The invention relates, on the one hand, to a method for cooling undercarriage in a tunnel kiln 1, through which kiln cars 4 can pass, for burning products for the building materials industry, and, on the other hand, to a corresponding tunnel kiln system, each with an insulated car body that crosses the tunnel kiln cross section into a treatment room that receives the firing material (with heating , Combustion and cooling zone) and an undercarriage compartment 6 and an undercarriage cooling is carried out in the undercarriage duct with the aid of air.

Das Erfindungswesentliche besteht darin, daß

  • a) Ofenwagen 4 mit luftdurchströmbar doppelwandigem Wagenboden 14 verwendet werden, deren Räder 16 in vom übrigen Unterwagenraum-Querschnitt unter Bildung von Warmluft-Ableitkanälen 23,24 abgetrennte Radkanäle 10 laufen,
  • b) die Kühlluft in Form von Umgebungsluft in die Radkanäle 10 eingeblasen wird, die Räder kühlt und dann mit einer Temperatur von vorzugsweise unter 120 °C in einen jeden Wagenboden 14 einströmt, wodurch eine Fahrgestell Abkühlung und eine weitere Lufterwärmung erfolgt,
  • c) die Warmluft aus den Wagenböden 14 in die neben den Radkanälen 10 verlaufenden Bereiche, sogen. Warmluft-Ableitkanäle 23, 24 entweicht und aus diesen in eine Warmluft-Sammelleitung 27 eingesogen wird, welche zu einem Verbraucher, beispielsweise Trockner, führt.
    • The essence of the invention is that
  • a) kiln car 4 with air-flow-through double-walled car floor 14 are used, the wheels 16 of which run in wheel channels 10 separated from the rest of the undercarriage space cross section to form warm air discharge channels 23, 24,
  • b) the cooling air is blown into the wheel channels 10 in the form of ambient air, cools the wheels and then flows into each car floor 14 at a temperature of preferably below 120 ° C., as a result of which chassis cooling and further air heating take place,
  • c) the warm air from the car floors 14 into the areas adjacent to the wheel channels 10, so-called. Warm air discharge channels 23, 24 escape and are sucked out of these into a hot air manifold 27, which leads to a consumer, such as a dryer.

    • In bevorzugter Weise wird die gezielte Räder-Kühlung sowie Trennung von Radund Chassis-Kühlung nur auf einem Teil der Tunnelofen-Länge, insbesondre im Bereich von etwa 600 - 700 °C in der einfahrtseitigen Tunnelhälfte sowie bis zu etwa 550 - 500 °C in der ausfahrtseitigen Tunnelhälfte, durchgeführt. Die erfindungsgemäße Rad- und Chassis-Kühlung erstreckt sich somit über einen Teilbereich der Aufheizzone, den Brennzonen-Bereich sowie den Schnellkühlzonen-Bereich. The targeted cooling of the wheels and separation of wheels and wheels is preferred Chassis cooling only over part of the length of the tunnel furnace, especially in the Range of about 600 - 700 ° C in the entrance half of the tunnel and up to about 550 - 500 ° C in the exit side of the tunnel. The Wheel and chassis cooling according to the invention thus extends over a Part of the heating zone, the firing zone area and the Rapid cooling zone area.

    Gemäß einer bevorzugten Ausgestaltung der Erfindung erfolgt die gezielte zweistufig am Ofenwagen 4 wirksam werdende Unterwagenkühlung in mindestens zwei in Tunnellängsrichtung hintereinanderliegenden Kühlzonen, welche jeweils gesondert mit Kühlluft (Umgebungsluft) versorgt werden und die Warmluft gesondert abführen. Eine vorteilhafte Tunnelofen-Anlage sieht vor, daß in jedem Unterwagenkühlsystem I, II am ausfahrtseitigen Systemende die Kühlluft zugeführt und am einfahrtseitigen Systemende die Warmluft abgeführt wird. Dabei kann die der Chassis-Kühlung dienende Luft mit max. 100 °C in den Wagenboden 14 eintreten und mit max. 200 °C austreten. Bei einer solchen Luftführung ergibt sich, daß die Kühlluft sich in den Radkanälen 10 auf etwa 50 - 70 °C aufheizt und in den doppelwandigen Wagenböden 14 auf etwa 150 - 200 °C aufheizt.According to a preferred embodiment of the invention, the targeted two-stage undercarriage cooling ineffective in kiln car 4 at least two cooling zones one behind the other in the longitudinal direction of the tunnel, which are separately supplied with cooling air (ambient air) and the Remove warm air separately. An advantageous tunnel kiln system provides that in each undercarriage cooling system I, II the cooling air at the exit end of the system fed and the warm air is discharged at the entrance end of the system. there can the air used for cooling the chassis with max. 100 ° C in the car floor 14 enter and with max. Exit at 200 ° C. With such an air duct results that the cooling air in the wheel channels 10 heats up to about 50 - 70 ° C and heated in the double-walled car floors 14 to about 150 - 200 ° C.

    Wie aus Fig. 1 und 2 in Zusammenschau zu entnehmen ist, strömt die Kühlluft in die Wagenböden 14 in Tunnelofen-Längsrichtung ein und verteil sich dann in Querrichtung. Dabei strömt sie in den Wagenböden 14 in querverlaufenden Kühlkanälen 20 und entweicht durch bodenseitige Öffnungen 22 in die Warmluft-Ableitkanäle 23,24.As can be seen from FIGS. 1 and 2 in summary, the cooling air flows in the car floors 14 in the longitudinal direction of the tunnel oven and then distribute in Transverse direction. It flows in the carriage floors 14 in transverse Cooling channels 20 and escapes through bottom openings 22 in the warm air discharge channels 23.24.

    Aus Fig. 1 ist ersichtlich, daß in Tunnelofen-Längsrichtung mindestens zwei autarke Kühlzonen, sogen. Unterwagenkühlsysteme I, II hintereinanderliegend angeordnet sind und dabei in jedem Unterwagenkühlsystem I, II am ausfahrtseitigen Systemende die Kühlluft-Hauptleitung 7 und am einfahrtseitigen Systemende die Warmluft-Hauptleitung 25 angeordnet sind.From Fig. 1 it can be seen that in the longitudinal direction of the tunnel oven at least two self-sufficient cooling zones, so-called Undercarriage cooling systems I, II one behind the other are arranged and in each undercarriage cooling system I, II am the cooling air main line 7 on the exit-side system end and on the entry-side System end of the hot air main line 25 are arranged.

    Die querverlaufenden Hauptleitungen 7, 25 für die Kühlluflzuführung und Warmluftableitung sind jeweils unterhalb des Tunnelofenbodens 2 angeordnet.The transverse main lines 7, 25 for the cooling air supply and Warm air discharge is arranged below the tunnel furnace floor 2.

    Die Kühlluft-Hauptleitung 7 ist mit einem Ventilator 8 versehen.The cooling air main line 7 is provided with a fan 8.

    Die Warmluft-Sammelleitung 27 ist vorzugsweise mit einem Trockner verbunden. The hot air manifold 27 is preferably connected to a dryer.

    Wie aus Fig. 2 zu ersehen ist, ist der Wagenboden 14 mit Luftkanälen 20 versehen, welche querschnittsmäßig von quer zur Schubachse verlaufenden Trägern 18 einer den Isolieraufbau tragenden und/oder bodenseitig begrenzenden Blechwandung 17 sowie einer teilweise durchlöcherten Abschlußwandung 19 begrenzt sind.As can be seen from FIG. 2, the car floor 14 is provided with air channels 20 provided, which cross-sectionally from transverse to the thrust axis Carriers 18 of an insulating structure that supports and / or delimits the bottom Sheet metal wall 17 and a partially perforated end wall 19 are limited.

    Claims (11)

    1. Method for cooling the lower chassis of vehicles in a tunnel kiln through which kiln vehicles (4) can pass to fire products for the building materials industry, an insulated vehicle superstructure dividing the tunnel kiln cross-section into a treatment region (5) holding the material to be fired, with heating up, firing and cooling zone, and a lower chassis region, the kiln vehicles (4) being designed with a double-walled vehicle floor (14) through which air can flow and the hot air escaping from the vehicle floors (14) into warm air dissipation ducts (23, 24) running alongside the wheels (16) of the kiln vehicles (4) and from the said ducts being drawn into a hot air collecting line (27), which leads to a consumer, characterised in that the lower chassis is cooled with the aid of air in the lower chassis region (6), the wheels (16) of the kiln vehicles (4) running in wheel channels (10) separated from the remaining lower chassis cross-section region thus forming hot air dissipation ducts (23, 24) and the cooling air being blown into the wheel ducts (10) in the form of atmospheric air which cools the wheels and then flows into each and every vehicle floor (14) at a temperature below 120°C, resulting in cooling of the chassis and further heating of the air.
    2. Method according to claim 1, characterised in that the targeted cooling of the wheels and separation of wheel and chassis cooling is only undertaken over a part of the tunnel kiln length, particularly in the region from approximately 600 - 700°C in the entrance side half of the tunnel to approximately 550 - 500°C in the exit side half of the tunnel and thus extends over a part region of the heating up zone, the firing zone region and the rapid cooling zones region.
    3. Method according to claim 1 or 2, characterised in that the targeted lower chassis cooling, acting on the kiln vehicle (4) in two stages, takes place in at least two cooling zones (I, II) arranged one behind the other in the longitudinal direction of the tunnel, each of which is supplied separately with cooling air (atmospheric air) and each of which routes away the hot air separately.
    4. Method according to one of claims 1 to 3, characterised in that the cooling air flows into the vehicle floors (14) in the longitudinal direction of the tunnel kiln and distributes itself in the transverse direction.
    5. Tunnel kiln system for firing products for the building materials industry and for implementing the method according to at least one of claims 1 to 4 with a tunnel kiln which has a heating up, firing and cooling zone, a large number of kiln vehicles (4) which can be moved through the tunnel kiln, the insulated vehicle superstructure of which divides the tunnel kiln cross-section into a treatment region (5) holding the material to be fired and a lower chassis region (6), kiln vehicles (4) with a double-walled vehicle floor (14) through which air can flow, and hot air dissipation ducts (23, 24) being present, through which hot air can be drawn out to a hot air collecting line (27), characterised by lower chassis cooling with the aid of air, acting section by section in the lower vehicle region (6), the tunnel kiln (1) being divided in the lower vehicle region (6) in its cross-section at least in the region used for cooling the lower chassis such that a wheel duct (10) with cooling air supply line (11) and alongside this a hot air dissipation duct (23, 24) are present for each wheel track, the cooling air supply lines being connected to a common main cooling air supply line (7) running transversely within the body of the kiln, through which atmospheric air can be blown into the lower chassis cooling system (I, II) and the walling of the vehicle floor (14) on the floor side having cooling air intake apertures (21) in the region of the wheel ducts (10) and hot air discharge apertures (22) in the other regions and the hot air dissipation ducts (23, 24) being connected to a common hot air main line (25) running transversely in the body of the kiln for the hot air produced during cooling of the lower chassis.
    6. Tunnel kiln system according to claim 5, characterised in that at least two autonomous cooling zones, so-called lower chassis cooling systems (I, II) are present one behind the other in the longitudinal direction of the tunnel kiln.
    7. Tunnel kiln system according to claim 5 or 6, characterised in that in each lower chassis cooling system (I, II) the cooling air main line (7) is arranged at the exit side end of the system and the hot air main line (25) at the entrance side end of the system.
    8. Tunnel kiln system according to one of claims 5 to 7, characterised in that the main lines, (7, 25) running transversely for the cooling air supply and hot air dissipation are each arranged below the floor (2) of the tunnel kiln.
    9. Tunnel kiln system according to one of claims 5 to 8, characterised in that the lower chassis cooling systems (I, II) extend over the exit region of the heating up zone, the entire firing zone and the rapid cooling zones region.
    10. Tunnel kiln system according to one of claims 5 to 9, characterised in that the hot air collecting line (27) is connected to a drier.
    11. Tunnel kiln system according to one of claims 5 to 10, characterised in that the vehicle floor (14) is provided with air ducts (20), which are bounded cross-sectionally by girders (18) running transverse to the thrust axis, a sheet metal walling (17) supporting the insulating structure and/or forming a boundary on the floor side and a partially perforated lower final walling (19).
    EP99102685A 1998-02-12 1999-02-12 Process and installation for cooling under the wagon and heat utilisation in a tunnel furnace Expired - Lifetime EP0937958B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19805742 1998-02-12
    DE19805742 1998-02-12

    Publications (2)

    Publication Number Publication Date
    EP0937958A1 EP0937958A1 (en) 1999-08-25
    EP0937958B1 true EP0937958B1 (en) 2004-05-26

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    ID=7857505

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99102685A Expired - Lifetime EP0937958B1 (en) 1998-02-12 1999-02-12 Process and installation for cooling under the wagon and heat utilisation in a tunnel furnace

    Country Status (4)

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    EP (1) EP0937958B1 (en)
    AT (1) ATE267993T1 (en)
    DE (1) DE59909547D1 (en)
    ES (1) ES2221243T3 (en)

    Cited By (1)

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    Publication number Priority date Publication date Assignee Title
    CN103542717A (en) * 2013-09-16 2014-01-29 南通市恒达机械制造有限公司 Mobile tunnel kiln with desulfuration conducted in presintering section

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN103952530B (en) * 2014-05-15 2015-11-25 辽宁向导科技发展有限公司 A kind of mobile trolley used air cooling system
    CN106017072B (en) * 2016-07-06 2018-04-10 福建省德化同鑫陶瓷有限公司 Energy-saving type hot air circulates tunnel cave and residual heat of tunnel kiln reuse method
    CN113566576A (en) * 2021-07-24 2021-10-29 安徽龙钰徽派古建工艺制品有限公司 Kiln tail gas waste heat cyclic utilization system is fired to ancient building blue brick

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    FR373118A (en) * 1906-12-31 1907-05-02 Albert Andrew Gery Improvements in brick making
    US1867318A (en) * 1930-02-26 1932-07-12 Walter A Hull Tunnel kiln
    US3129933A (en) * 1959-07-23 1964-04-21 Cremer Gottfried Tunnel furnace arrangement
    DE3604501C1 (en) * 1986-02-13 1993-01-14 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm Method and device for cooling undercarriage of kiln cars in a tunnel kiln
    DE3717356C1 (en) * 1987-05-22 1988-09-22 Keller Ofenbau Gmbh Tunnel furnace for baking shaped ceramic products
    EP0314820B1 (en) * 1987-11-02 1992-04-01 Vogel & Noot Industrieanlagenbau Gesellschaft m.b.H. Device for the under-wagon cooling of furnace wagons in tunnel furnaces
    DE3834836A1 (en) * 1988-10-13 1990-04-19 Brakemeier Karl Heinz Apparatus for removing gaseous media from furnaces for treating ceramic material

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    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN103542717A (en) * 2013-09-16 2014-01-29 南通市恒达机械制造有限公司 Mobile tunnel kiln with desulfuration conducted in presintering section

    Also Published As

    Publication number Publication date
    DE59909547D1 (en) 2004-07-01
    EP0937958A1 (en) 1999-08-25
    ATE267993T1 (en) 2004-06-15
    ES2221243T3 (en) 2004-12-16

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