EP0937958A1 - 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
EP0937958A1
EP0937958A1 EP99102685A EP99102685A EP0937958A1 EP 0937958 A1 EP0937958 A1 EP 0937958A1 EP 99102685 A EP99102685 A EP 99102685A EP 99102685 A EP99102685 A EP 99102685A EP 0937958 A1 EP0937958 A1 EP 0937958A1
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EP
European Patent Office
Prior art keywords
cooling
air
undercarriage
tunnel
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99102685A
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German (de)
French (fr)
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EP0937958B1 (en
Inventor
Gerold Krimpenfort
Helmut Lindemann
Thomas Trepte
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Keller HCW GmbH
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Keller HCW GmbH
Keller GmbH
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Publication of EP0937958A1 publication Critical patent/EP0937958A1/en
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Classifications

    • 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 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 resistant to thermal loads 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 sensible.
  • the invention is therefore based on the object of the generic method as well as a tunnel kiln installation necessary 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 this means that there is little air volume movement a high temperature reduction on the chassis parts is possible and the warm air generated has a relatively high temperature - as a result 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 oven).
  • a section can be about 30 m long.
  • the single ones Sections can be separated from one another by means of seals, baffles 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.
  • the invention relates on the one hand to a method for cooling undercarriage in one Tunnel kiln 1 which can be passed through by kiln car 4 for firing products for the building materials industry and on the other hand a corresponding tunnel kiln system, where each an insulated car body the tunnel furnace cross-section into one Treatment room receiving the firing material (with heating, burning and cooling zone) and divided an undercarriage space 6 and in the undercarriage duct with the help of air undercarriage cooling is performed.
  • 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 undercarriage cooling in two stages on the 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 the cooling air in each undercarriage cooling system I, II at the exit end of the system fed and the warm air is discharged at the entrance end of the system.
  • 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 flow 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 Cross 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 at the exit-side system end and at the entrance-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 at the exit-side system end and at the entrance-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 one that supports the insulating structure and / or delimits the bottom Sheet metal wall 17 and a partially perforated end wall 19 are limited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing Of Solid Wastes (AREA)
  • Furnace Details (AREA)

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.

Das gattungsgemäße Verfahren sowie gattungsgemäße Tunnelofen-Anlagen sind 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 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 resistant to thermal loads 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 sensible.

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 necessary 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. Beneficial 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 this means that there is little air volume movement a high temperature reduction on the chassis parts is possible and the warm air generated has a relatively high temperature - as a result 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 oven). A section can be about 30 m long. The single ones Sections can be separated from one another by means of seals, baffles 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.

Auf 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 furnace 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,
Fig. 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
Länasträaer 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
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
2nd
Tunnel floor
3rd
track
4th
Kiln car
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
10th
Wheel channel
11
Cooling air supply line
12th
Cooling air outlet opening from 11 to 10
13
Isolation structure of 4
14
air-permeable double-walled car floor
15
Länastraäer for 14 and wheel arrangement
16
Wheels of 4
17th
upper supporting wall (so-called insulating floor plate) from 14
18th
Cross member within 14
19th
bottom wall of 14
20th
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
24th
Warm air discharge duct (on the side) within the undercarriage compartment 6
25th
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

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 invention relates on the one hand to a method for cooling undercarriage in one Tunnel kiln 1 which can be passed through by kiln car 4 for firing products for the building materials industry and on the other hand a corresponding tunnel kiln system, where each an insulated car body the tunnel furnace cross-section into one Treatment room receiving the firing material (with heating, burning and cooling zone) and divided an undercarriage space 6 and in the undercarriage duct with the help of air undercarriage cooling is performed.

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 ducts 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., thereby cooling the chassis and further heating the air,
  • 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 Rad-und 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. Targeted wheel cooling and separation of wheel and wheel are 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 undercarriage cooling in two stages on the 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 the cooling air in each undercarriage cooling system I, II at the exit end of the system fed and the warm air is discharged at the entrance end of the system. Here 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 flow 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 Cross 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 at the exit-side system end and at the entrance-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 one that supports the insulating structure and / or delimits the bottom Sheet metal wall 17 and a partially perforated end wall 19 are limited.

    Claims (18)

    Verfahren zur Unterwagenkühlung in einem von Ofenwagen durchfahrbaren Tunnelofen zum Brennen von Produkten für die Baustoffindustrie, wobei ein isolierter Wagenaufbau den Tunnelofen-Querschnitt in einen das Brenngut aufnehmenden Behandlungsraum, mit Aufheiz-, Brenn- und Kühlzone, und einen Unterwagenraum unterteilt und im Unterwagenkanal mit Hilfe von Luft eine Unterwagenkühlung durchgeführt wird,
    dadurch gekennzeichnet, 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 unter 120 °C in einen jeden Wagenboden (14) einströmt, wodurch eine Fahrgestell-Abkühlung und 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.     Method for cooling undercarriage in a tunnel kiln that can be driven through by kiln cars for firing products for the building materials industry, whereby an insulated car body divides the tunnel kiln cross-section into a treatment room that receives the fuel, with heating, burning and cooling zone, and an undercarriage room and in the undercarriage channel with the help air is used to cool the undercarriage,
    characterized in that a) oven wagons (4) with air-permeable double-walled wagon floor (14) are used, the wheels (16) of which run in wheel ducts (10) separated from the rest of the undercarriage cross-section with the formation of warm air discharge ducts (23, 24), b) the cooling air is blown into the wheel ducts (10) in the form of ambient air, cools the wheels and then flows into each vehicle floor (14) at a temperature of 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) in 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 collecting line (27) which leads to a consumer, for example a dryer.     Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die gezielte Räder-Kühlung sowie Trennung von Rad- und Chassis-Kühlung nur auf einem Teil der Tunnelofen-Länge, insbesondere im Bereich von etwa 600 - 700°C in der einfahrtseitigen Tunnelhälfte bis zu etwa 550 - 500°C in der ausfahrtseitigen Tunnelhälfte, durchgeführt wird und sich somit über einen Teilbereich der Aufheizzone, den Brennzonen-Bereich sowie den Schnellkühlzonen-Bereich erstreckt.A method according to claim 1, characterized in that the targeted Wheel cooling and separation of wheel and chassis cooling only on one part the length of the tunnel furnace, especially in the range of about 600 - 700 ° C in the entrance half of the tunnel up to about 550 - 500 ° C in the exit side Half of the tunnel, is carried out and thus over a portion of the Heating zone, the firing zone area and the rapid cooling zone area extends. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die gezielte, zweistufig am Ofenwagen (4) wirksam werdende Unterwagenkühlung in mindestens zwei in Tunnellängsrichtung hintereinanderliegenden Kühlzonen (I, II) erfolgt, welche jeweils gesondert mit Kühlluft (Umgebungsluft) versorgt werden und die Warmluft gesondert abführen.A method according to claim 1 or 2, characterized in that the targeted, undercarriage cooling that becomes effective in two stages on the kiln car (4) two cooling zones (I, II) lying 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. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in jedem Unterwagenkühlsystem (I, II) am ausfahrtseitigen Systemende die Kühlluft zugeführt und am einfahrtseitigen Systemende die Warmluft abgeführt wird.Method according to one of claims 1 to 3, characterized in that that in each undercarriage cooling system (I, II) at the exit end of the system Cooling air is supplied and the warm air is discharged at the end of the system. Verfahren nach einem der Ansprüche 1- 4, dadurch gekennzeichnet, daß die der Chassis-Kühlung dienende Luft mit max. 100°C in den Wagenboden (14) eintritt und mit max. 200°C austritt.Method according to one of claims 1- 4, characterized in that that the chassis cooling air with max. 100 ° C in the car floor (14) occurs and with max. Exits at 200 ° C. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Kühlluft sich in den Radkanälen (10) auf etwa 50 - 70°C aufheizt.Method according to one of claims 1 to 5, characterized in that that the cooling air in the wheel channels (10) heats up to about 50 - 70 ° C. Verfahren nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß die Kühlluft sich in den doppelwandigen Wagenböden (14) auf etwa 150° - 200°C aufheizt.Method according to one of claims 1-6, characterized in that that the cooling air in the double-walled car floors (14) to about 150 ° - 200 ° C heated. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Kühlluft in den Wagenböden (14) in Tunnelofen-Längsrichtung einströmt und sich in Querrichtung verteilt.Method according to one of claims 1 to 7, characterized in that that the cooling air flows into the car floors (14) in the longitudinal direction of the tunnel furnace and spread in the transverse direction. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Kühlluft in den Wagenböden (14) in querverlaufende Kühlkanäle (20) strömt und durch bodenseitige Öffnungen (22) in die Warmluft-Ableitkanäle (23, 24) ausströmt. A method according to claim 8, characterized in that the cooling air in the Wagon floors (14) flow into and through transverse cooling channels (20) Bottom openings (22) in the warm air discharge channels (23, 24) flows out. Tunnelofen-Anlage zum Brennen von Produkten für die Baustoffindustrie sowie zur Durchführung des Verfahrens nach mindestens einem der Ansprüche 1 bis 9, mit a) einem eine Aufheiz-, Brenn- und Kühlzone aufweisenden Tunnelofen, b) einer Vielzahl von durch den Tunnelofen bewegbaren Ofenwagen, deren isolierter Wagenaufbau den Tunnelofen-Querschnitt in einen das Brenngut aufnehmenden Behandlungsraum und einen Unterwagenraum unterteilt sowie c) eine im Unterwagenkanal abschnittsweise wirksamen Unterwagenkühlung mit Hilfe von Luft, dadurch gekennzeichnet, daß a) der Tunnelofen (1) im Unterwagenraum (6) zumindest in dem zur Unterwagenkühlung genutzten Bereich querschnittsmäßig derart unterteilt ist, daß für jede Radspur ein Radkanal (10) mit Kühlluft-Zuführleitung (11) und daneben ein Warmluft-Ableitkanal (23, 24) vorhanden sind, wobei die Kühlluft-Zuführleitungen an einer gemeinsamen im Ofenkörper querverlaufenden Kühlluft-Hauptleitung (7) angeschlossen sind, durch welche Umgebungsluft ins Unterwagenkühlsystem (I, II) einblasbar ist, b) Ofenwagen (4) mit luftdurchströmbar doppelwandigem Wagenboden (14) vorhanden sind, dessen bodenseitige Wandung im Bereich der Radkanäle (10) Kühlluft-Einströmöffnungen (21) und in den übrigen Bereichen Warmluft-Ausströmöffnungen (22) aufweist, c) die Warmluft-Ableitkanäle (23, 24) an einer gemeinsamen, im Ofenkörper querverlaufenden Warmluft-Hauptleitung (25) angeschlossen sind, durch welchen die bei der Unterwagenkühlung angefallene Warmluft zu einer Warmluft-Sammelleitung (27) absaugbar ist. Tunnel kiln system for firing products for the building materials industry and for carrying out the method according to at least one of claims 1 to 9, with a) a tunnel furnace having a heating, burning and cooling zone, b) a multiplicity of kiln cars which can be moved through the tunnel kiln, the insulated car structure of which divides the tunnel kiln cross section into a treatment room which receives the firing material and an undercarriage room, and c) undercarriage cooling, which is effective in sections in the undercarriage channel, using air characterized in that a) the tunnel kiln (1) in the undercarriage space (6) is divided at least in the area used for cooling the undercarriage in such a way that for each wheel track a wheel channel (10) with cooling air supply line (11) and next to it a warm air discharge channel (23, 24 ) are present, the cooling air supply lines being connected to a common cooling air main line (7) running transversely in the furnace body, through which ambient air can be blown into the undercarriage cooling system (I, II), b) kiln cars (4) with air-permeable double-walled car floor (14) are present, the bottom wall of which has cooling air inflow openings (21) in the area of the wheel channels (10) and hot air outflow openings (22) in the other areas, c) the hot air discharge ducts (23, 24) are connected to a common hot air main line (25) running transversely in the furnace body, through which the warm air obtained during the undercarriage cooling can be extracted to a hot air collecting line (27). Tunnelofen-Anlage nach Anspruch 10, dadurch gekennzeichnet,
    daß in Tunnelofen-Längsrichtung mindestens zwei autarke Kühlzonen, sogen. Unterwagenkühlsysteme (I, II), hintereinanderliegend angeordnet sind.    Tunnel furnace system according to claim 10, characterized in
    that in the longitudinal direction of the tunnel oven at least two self-sufficient cooling zones, so-called. Undercarriage cooling systems (I, II) are arranged one behind the other.         Tunnelofen-Anlage nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß in jedem Unterwagenkühlsystem (I, II) am ausfahrtseitigen Systemende die Kühlluft-Hauptleitung (7) und am einfahrtseitigen Systemende die Warmluft-Hauptleitung (25) angeordnet sind. Tunnel furnace system according to claim 10 or 11, characterized in that in each undercarriage cooling system (I, II) at the exit end of the system Cooling air main line (7) and the warm air main line at the entry end of the system (25) are arranged. Tunnelofen-Anlage nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß die querverlaufenden Hauptleitungen (7, 25) für die Kühlluftzuführung und Warmluftableitung jeweils unterhalb des Tunnelofenbodens (2) angeordnet sind.Tunnel furnace system according to one of claims 10 to 12, characterized in that the transverse main lines (7, 25) for the cooling air supply and Warm air discharge are arranged below the tunnel furnace floor (2). Tunnelofen-Anlage nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß die Unterwagenkühlsysteme (I, II) sich über den Ausgangsbereich der Aufheizzone, die gesamte Brennzone und den Schnellkühlzonen-Bereich erstrecken.Tunnel furnace system according to one of claims 10 to 13, characterized in that the undercarriage cooling systems (I, II) over the exit area of the Heating zone, the entire firing zone and the rapid cooling zone area extend. Tunnelofen-Anlage nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß die Kühlluft-Hauptleitung (7) mit einem Ventilator (8) versehen ist.Tunnel kiln system according to one of claims 10 to 14, characterized in that that the cooling air main line (7) is provided with a fan (8). Tunnelofen-Anlage nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, daß die Warmluft-Sammelleitung (27) mit einem Trockner verbunden ist.Tunnel furnace system according to one of claims 10 to 15, characterized in that that the hot air manifold (27) is connected to a dryer. Tunnelofen-Anlage nach einem der Ansprüche 10 bis 16, dadurch gekennzeichnet, daß die Ofenwagen (4) im Wagenboden (14) mit quer zur Schubachse verlaufenden Luftkanälen (20) versehen sind.Tunnel furnace system according to one of claims 10 to 16, characterized in that that the kiln car (4) in the car floor (14) with transverse to the thrust axis extending air channels (20) are provided. Tunnelofen-Anlage nach Anspruch 17, dadurch gekennzeichnet,
    daß der Wagenboden (14) mit Luftkanälen (20) versehen ist, welche querschnittsmäßig von quer zur Schubachse verlaufenden Trägern (18), einer den Isolieraufbau tragenden und/oder bodenseitig begrenzenden Blechwandung (17) sowie einer teilweise durchlöchserten unteren Abschlußwandung (19) begrenzt sind.    Tunnel furnace system according to claim 17, characterized in that
    that the carriage floor (14) is provided with air channels (20) which are cross-sectionally delimited by beams (18) running transversely to the thrust axis, a sheet metal wall (17) supporting the insulating structure and / or the bottom, and a partially perforated lower end wall (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

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    EP0937958B1 EP0937958B1 (en) 2004-05-26

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

    Cited By (3)

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    CN103952530A (en) * 2014-05-15 2014-07-30 辽宁向导科技发展有限公司 Movable trolley air-cooling system
    CN108489263A (en) * 2016-07-06 2018-09-04 福建省德化同鑫陶瓷有限公司 A kind of tunnel oven hot air circulation 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

    Families Citing this family (1)

    * 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

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    US4990086A (en) * 1987-11-02 1991-02-05 Claudio Eustacchio System for under-cart cooling of furnace carts in tunnel furnaces
    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

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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
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    CN103952530A (en) * 2014-05-15 2014-07-30 辽宁向导科技发展有限公司 Movable trolley air-cooling system
    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
    CN108489263A (en) * 2016-07-06 2018-09-04 福建省德化同鑫陶瓷有限公司 A kind of tunnel oven hot air circulation 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

    Also Published As

    Publication number Publication date
    ATE267993T1 (en) 2004-06-15
    ES2221243T3 (en) 2004-12-16
    EP0937958B1 (en) 2004-05-26
    DE59909547D1 (en) 2004-07-01

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