DE3908758C1 - Tunnel furnace for baking light bricks - Google Patents
Tunnel furnace for baking light bricksInfo
- Publication number
- DE3908758C1 DE3908758C1 DE19893908758 DE3908758A DE3908758C1 DE 3908758 C1 DE3908758 C1 DE 3908758C1 DE 19893908758 DE19893908758 DE 19893908758 DE 3908758 A DE3908758 A DE 3908758A DE 3908758 C1 DE3908758 C1 DE 3908758C1
- Authority
- DE
- Germany
- Prior art keywords
- zone
- gases
- preheating
- degassing
- heat exchanger
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Tunnelofen zum Brennen von Leichtziegeln mit hohem Anteil an verbrenn und vergasbaren Bestandteilen gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a tunnel kiln Burning light bricks with a high proportion of burn and gasifiable components according to the generic term of claim 1.
Bei einem bekannten Tunnelofen dieser Art (DE-PS 37 17 320) wird von den abgesaugten Schwelgasen hinter der ersten Aufheizstufe ein Teil abgezweigt, welcher durch eine Nachverbrennungsvorrichtung sowie zur weiteren Erwärmung der im Umwälzkreis verbliebenen Gase durch die zweite Aufheizstufe hindurchgeführt und in die Leitung der aus der Brennkammer abgesaugten Rauchgase eingespeist wird.In a known tunnel furnace of this type (DE-PS 37 17 320) is extracted from the carbonization gases behind the first Heating stage branched off a part, which by a Afterburning device and for further heating of the gases remaining in the circulation circuit through the second Passed through the heating stage and in the line of Flue gases extracted from the combustion chamber are fed in becomes.
Die im Umwälzkreis verbliebenen Gase gelangen in die Vorwärm- und Entgasungszone vor einem Tor, welches diese Zone von der Brennzone trennt.The gases remaining in the circulating circuit get into the Preheating and degassing zone in front of a gate, which separates this zone from the burning zone.
Der Erfindung liegt die Aufgabe zugrunde, einen Tunnelofen der im Oberbegriff des Patentanspruchs aufgeführten Art so weiterzubilden, daß ein Tor zwischen Vorwärm und Brennzone nicht mehr erforderlich ist und dadurch Umbauten am Ofen weniger aufwendig werden.The invention has for its object a tunnel kiln the listed in the preamble of the claim Kind in such a way that a gate between preheating and burning zone is no longer required and thereby Modifications to the oven become less expensive.
Diese Aufgabe wird mit den im Patentanspruch 1 gekennzeich neten Merkmalen gelöst.This object is characterized in that in claim 1 neten characteristics solved.
Die Zeichnung zeigt schematisch einen Längsschnitt des Tunnelofens.The drawing shows schematically a longitudinal section of the tunnel oven.
In dem Tunnelofen 1 bedeuten A die Einfahrschleuse, B die Vorwärm- und Entgasungszone und C die Brennzone. In tunnel kiln 1, A is the entry lock, B is the preheating and degassing zone and C is the combustion zone.
Längs der Vorwärm- und Entgasungszone B erstreckt sich ein Gas-Umwälzkreis, welcher aus den brennbaren flüchtigen Bestandteilen in den Formlingen entstehende Gase (Schwel gas) mittels eines Ventilators 7 fördert. Diese Gase werden an Ansaugöffnungen 2 direkt hinter dem Schleusen tor 3 entnommen und nahe der Brennzone C in die Vorwärm und Entgasungszone B des Ofens 1 wieder eingespeist. In Umwälzrichtung hinter dem Ventilator 7 ist eine erste Aufheizstufe 6, bestehend aus einem nach Gegenstrom prinzip arbeitenden Wärmeaustauscher, geschaltet, in welchem im Austausch mit den abgesaugten Rauchgasen des Tunnelofens 1 die umgewälzten Gase vorgewärmt werden. Anschließend an die erste Aufheizstufe 6 werden die umgewälzten Gase durch eine Nachverbrennungsvorrichtung 8 mit dieser zugehörigen zweiten Aufheizstufe 8′ geleitet und über ein Verteilersystem 9 in die Vorwärm- und Entgasungszone eingespeist.A gas circulation circuit extends along the preheating and degassing zone B , which promotes gases (smoldering gas) formed from the combustible volatile constituents in the moldings by means of a fan 7 . These gases are taken from intake openings 2 directly behind the lock gate 3 and are fed back into the preheating and degassing zone B of the furnace 1 near the combustion zone C. In the direction of circulation behind the fan 7 , a first heating stage 6 , consisting of a heat exchanger operating on the countercurrent principle, is connected, in which the circulated gases are preheated in exchange with the extracted smoke gases from the tunnel furnace 1 . Subsequent to the first heating stage 6 , the circulated gases are passed through a post-combustion device 8 with this associated second heating stage 8 'and fed via a distributor system 9 into the preheating and degassing zone.
Hierbei dient die aus der durch den Ventilator 7 abgesaug ten Schwelgasmenge und aus der durch den Wärmeaustauscher 8′ der zweiten Aufheizstufe gezogenen Frischluftmenge resultierende Temperatur der wieder einzuspeisenden Gase zur genauen Steuerung des Temperaturgradienten in der Vorwärm- und Entgasungszone.Here, the temperature of the gases to be re-fed, which results from the amount of smoldering gas extracted by the fan 7 and from the fresh air amount drawn by the heat exchanger 8 'of the second heating stage, for precise control of the temperature gradient in the preheating and degassing zone.
Die Brenngase aus der Brennzone C strömen in Richtung von Abzugsöffnungen 4 und werden dort mittels eines Rauchgasventilators 5 vollständig abgesaugt und abgeführt. Die Abzugsöffnungen 4 befinden sich im Bereich einer Aufheiztemperatur der Vorwärm- und Entgasungszone von ca. 500°, bezogen auf das Brenngut. In diesem Temperatur bereich sind erfahrungsgemäß alle schädlichen Entgasungs produkte aus dem zu brennenden Gut bereits entfernt.The fuel gases from the combustion zone C flow in the direction of exhaust openings 4 and are completely extracted and removed there by means of a flue gas fan 5 . The discharge openings 4 are in the region of a heating temperature of the preheating and degassing zone of approximately 500 °, based on the firing material. Experience has shown that all harmful degassing products are already removed from the material to be burned in this temperature range.
Da der Rauchgasabzug sich in einem Temperaturbereich befindet, in dem schädliche Schwelgase im Ofen nicht mehr vorhanden sind und die umgewälzten Gase nach der Nachverbrennung ebenfalls frei von schädlichen Entgasungs produkten sind, ist eine scharfe Abgrenzung der Vorwärm und Entgasungszone zur Brennzone nicht mehr nötig.Because the flue gas outlet is in a temperature range in which harmful carbonization gases in the furnace are not more are present and the circulated gases after the Afterburning also free of harmful degassing products is a clear demarcation of preheating and degassing zone to the combustion zone is no longer necessary.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893908758 DE3908758C1 (en) | 1989-03-17 | 1989-03-17 | Tunnel furnace for baking light bricks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893908758 DE3908758C1 (en) | 1989-03-17 | 1989-03-17 | Tunnel furnace for baking light bricks |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3908758C1 true DE3908758C1 (en) | 1990-04-19 |
Family
ID=6376559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19893908758 Expired - Fee Related DE3908758C1 (en) | 1989-03-17 | 1989-03-17 | Tunnel furnace for baking light bricks |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3908758C1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3923887A1 (en) * | 1989-07-19 | 1991-01-24 | Manfred Leisenberg Kg | Tunnel furnace for firing ceramics - with decomposition toxic gases withdrawn and reheated to ensure complete burning before being exhausted to atmos. |
EP0662596A2 (en) * | 1993-12-23 | 1995-07-12 | Innovatherm Prof. Dr. Leisenberg GmbH & Co. KG | Tunnel furnace |
DE4420295C1 (en) * | 1994-06-10 | 1995-10-26 | Riedhammer Gmbh Co Kg | Continuous furnace |
EP1049904A1 (en) † | 1997-12-22 | 2000-11-08 | Corning Incorporated | Method for firing ceramic honeycomb bodies and a tunnel kiln used therefor |
EP3016766A2 (en) * | 2013-07-01 | 2016-05-11 | Eisenmann SE | Method for sintering workpieces to be sintered, and system for this purpose |
CN116678208A (en) * | 2023-08-04 | 2023-09-01 | 成都莒纳新材料科技有限公司 | Tunnel furnace for electrode slice production |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2641674A1 (en) * | 1976-09-16 | 1978-03-23 | Haessler Andreas | Lightweight ceramic bricks contg. solid fuels - which are waste agricultural prods. and/or plastics, burnt during brick baking |
DE3014905B1 (en) * | 1980-04-18 | 1981-02-19 | Keller Ofenbau Gmbh | Process and tunnel kiln for firing ceramic moldings containing fuel |
DE3717320C1 (en) * | 1987-05-22 | 1988-07-14 | Lingl Anlagenbau | Tunnel kiln for burning light bricks with a high proportion of combustible and gasifiable components |
-
1989
- 1989-03-17 DE DE19893908758 patent/DE3908758C1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2641674A1 (en) * | 1976-09-16 | 1978-03-23 | Haessler Andreas | Lightweight ceramic bricks contg. solid fuels - which are waste agricultural prods. and/or plastics, burnt during brick baking |
DE3014905B1 (en) * | 1980-04-18 | 1981-02-19 | Keller Ofenbau Gmbh | Process and tunnel kiln for firing ceramic moldings containing fuel |
DE3717320C1 (en) * | 1987-05-22 | 1988-07-14 | Lingl Anlagenbau | Tunnel kiln for burning light bricks with a high proportion of combustible and gasifiable components |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3923887A1 (en) * | 1989-07-19 | 1991-01-24 | Manfred Leisenberg Kg | Tunnel furnace for firing ceramics - with decomposition toxic gases withdrawn and reheated to ensure complete burning before being exhausted to atmos. |
EP0662596A2 (en) * | 1993-12-23 | 1995-07-12 | Innovatherm Prof. Dr. Leisenberg GmbH & Co. KG | Tunnel furnace |
EP0662596A3 (en) * | 1993-12-23 | 1996-07-10 | Innovatherm Prof Dr Leisenberg Gmbh & Co Kg | Tunnel furnace. |
DE4420295C1 (en) * | 1994-06-10 | 1995-10-26 | Riedhammer Gmbh Co Kg | Continuous furnace |
EP1049904A1 (en) † | 1997-12-22 | 2000-11-08 | Corning Incorporated | Method for firing ceramic honeycomb bodies and a tunnel kiln used therefor |
EP1049904B2 (en) † | 1997-12-22 | 2014-10-01 | Corning Incorporated | A tunnel kiln used for firing ceramic honeycomb bodies |
EP3016766A2 (en) * | 2013-07-01 | 2016-05-11 | Eisenmann SE | Method for sintering workpieces to be sintered, and system for this purpose |
CN116678208A (en) * | 2023-08-04 | 2023-09-01 | 成都莒纳新材料科技有限公司 | Tunnel furnace for electrode slice production |
CN116678208B (en) * | 2023-08-04 | 2023-12-05 | 成都莒纳新材料科技有限公司 | Tunnel furnace for electrode slice production |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |