EP0717830B1 - Four de passage continu - Google Patents

Four de passage continu Download PDF

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Publication number
EP0717830B1
EP0717830B1 EP95921694A EP95921694A EP0717830B1 EP 0717830 B1 EP0717830 B1 EP 0717830B1 EP 95921694 A EP95921694 A EP 95921694A EP 95921694 A EP95921694 A EP 95921694A EP 0717830 B1 EP0717830 B1 EP 0717830B1
Authority
EP
European Patent Office
Prior art keywords
furnace
heating zone
continuous furnace
accordance
air ducts
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 - Lifetime
Application number
EP95921694A
Other languages
German (de)
English (en)
Other versions
EP0717830A1 (fr
Inventor
Bernd Kölln
Henning Richter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riedhammer GmbH
Riedhammer GmbH and Co KG
Original Assignee
Riedhammer GmbH
Riedhammer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Riedhammer GmbH, Riedhammer GmbH and Co KG filed Critical Riedhammer GmbH
Publication of EP0717830A1 publication Critical patent/EP0717830A1/fr
Application granted granted Critical
Publication of EP0717830B1 publication Critical patent/EP0717830B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • 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
    • F27B9/36—Arrangements of heating devices

Definitions

  • the invention relates to a continuous furnace for burning ceramic moldings.
  • continuous furnace stands for all types of continuous ovens, for example Tunnel kilns with kiln cars or roller kilns.
  • ceramic molded parts basically includes all Types of ceramic moldings, such as porcelain, sanitary ware etc. But there are also special ceramic products, such as ferrites, for example soft ferrites.
  • Such soft ferrites are characterized in that they produced using a binder / pressing aid and processed into molded parts.
  • These additives usually consist of organic substances, such as Polyvinyl alcohol.
  • the soft ferrites mentioned show compared to conventional ones ceramic products a special behavior during the Burning process. When heating in the oven, i.e. in the heating zone, burn out these additives so that it becomes a Contamination of the furnace atmosphere with organic components is coming.
  • DE 36 32 918 C2 describes a method for heating the Heating zone of a tunnel oven described in the area the warming zone was supplied with hot furnace gas Branch line is arranged from the above Conveyors the heating zone is heated and furnace gas the heating zone in the opposite direction into the bypass line for thermal post-cleaning.
  • DE 32 32 294 C1 describes a method for sintering Soft ferrites in a chamber furnace, i.e. one discontinuous working furnace, described in which the furnace atmosphere during the so-called “binder phase” additionally is heated outside the furnace chamber, namely in that the volatilize during the binder phase Binder in the circulation circuit outside the furnace chamber be burned continuously and the resulting Combustion gases remain in the circulation circuit and only the excess gas quantities are removed.
  • the gas supplied to the furnace chamber be practically “inert". In this way, however Do not control / regulate the furnace atmosphere in the desired way.
  • the known method is discontinuous Oven limited.
  • the invention has for its object a continuous furnace specify that meets the following criteria: it should the energetically effective ones present in the flue gas of the furnace Components, in particular those that outgas in the heating zone Binder proportions can be used for thermal purposes.
  • a defined furnace atmosphere should above all be adjustable in the heating zone. After all, the Pyroprocess overall to be optimized energetically.
  • Such a continuous furnace has the following advantages:
  • the heating zone becomes hot air at one or more points deducted, for example with gaseous binder components is loaded during the heating phase of the ceramic Degas molded parts from these.
  • the combustion gases then become one Combustion chamber fed, burned there, so that one largely cleaned hot air then to the heating zone can be traced back.
  • the combustion chamber can in the oven, but separate from the oven duct, for example below of the furnace duct or externally.
  • the recirculated hot air has a temperature, for example from 600 to 1,000 ° C and is therefore significantly above the temperature required in the heating zone.
  • the temperature in the heating zone - in Direction of transport of the firing material considered - different (increasing). In any case, however, is usually the maximum temperature of the furnace atmosphere in the heating zone well below the aforementioned 1,000 ° C, namely for example at 600 ° C.
  • An embodiment of the invention provides that Warm air pipes - viewed in the transport direction of the goods - to be arranged one behind the other along the heating zone, preferably to homogenize the furnace atmosphere warm air is supplied from both sides.
  • warm air pipes led vertically one above the other into the heating zone to be even over the height of the furnace duct Ensure warm air supply.
  • One embodiment of the invention provides that the amount of cold air supplied from the cold air lines or their temperature can be regulated or controlled accordingly a preselectable temperature / atmosphere profile for the continuous furnace.
  • the regulation or control can, for example for a corresponding valve in the connection area of the cold air lines to the respective hot air pipe.
  • the external combustion chamber can be in a suitable location are arranged and is for example with an or equipped with several own burners. Any excess air can be led away via a chimney.
  • the continuous furnace itself can be done in a conventional manner Be energetically supplied, for example with gas or electric heating elements.
  • a tunnel kiln is shown with the reference number 10 an oven entrance 12, a heating zone 14, a firing zone 16 and has a cooling zone 18 and an oven exit 20.
  • the transport route of the fired material passed through the furnace 10 is represented by the arrow T.
  • a flue gas line 22 runs from the heating zone into one Combustion chamber 24, which is fired with a burner 26 becomes.
  • a hot air line runs from the combustion chamber 24 28 back towards the heating zone 14. Before entering The hot air line 28 branches into the heating zone 14 however, here in six sub-lines (warm air lines called) and marked with the reference numeral 30.
  • the Warm air lines 30 each open in pairs from the left and right through the furnace wall into the furnace duct and are open each furnace side in the transport direction T arranged one behind the other.
  • a cold air line 32 leads to each warm air line 30, a control valve 34 being arranged in each case in the transition region is set so that the amount of cold air supplied can be.
  • the temperature is of course also the same of the cold air supplied to the individual hot air lines 30 individually adjustable.

Landscapes

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

Claims (10)

  1. Four de passage continu pour la cuisson de pièces de forme en céramique caractérisé par une zone de chauffage (14), une zone de cuisson (16) et une zone de refroidissement (18), au moins une conduite de gaz de fumée (22) qui s'étend de la zone de chauffage (14) dans une chambre de combustion (24), au moins une conduite d'air très chaud (28) qui revient de la chambre de combustion (24) à la zone de chauffage (14), la conduite d'air très chaud (28) se ramifiant avant la zone de chauffage (14) en plusieurs conduites d'air chaud (30) qui débouchent dans la zone de chauffage (14) avec un certain espacement les unes par rapport aux autres, et des conduites d'air froid (32) qui débouchent dans la conduite d'air très chaud (28) et/ou dans les conduites d'air chaud (30).
  2. Four de passage continu selon la revendication 1, dans lequel chaque conduite d'air chaud (30) possède sa propre conduite d'air froid (32).
  3. Four de passage continu selon la revendication 1 ou la revendication 2, dans lequel la quantité d'air froid alimentée à partir des conduites d'air froid (32) peut être régulée ou commandée.
  4. Four de passage continu selon la revendication 3, dans lequel une soupape de régulation ou de commande (34) est disposée dans la zone de raccordement des conduites d'air froid (32) à chacune des conduites d'air chaud (30).
  5. Four de passage continu selon l'une quelconque des revendications 1 à 4, dans lequel la chambre de combustion (24) est formée avec des brûleurs (26).
  6. Four de passage continu selon l'une quelconque des revendications 1 à 5, dans lequel la zone de chauffage (14) est dépourvue de brûleurs ou de dispositifs de chauffage électriques.
  7. Four de passage continu selon l'une quelconque des revendications 1 à 6, dans lequel les conduites d'air chaud (30) débouchent dans les deux surfaces de paroi du four.
  8. Four de passage continu selon l'une quelconque des revendications 1 à 7, dans lequel les conduites d'air chaud (30) sont disposées les unes derrière les autres dans le sens du transfert (T) des pièces de forme en céramique.
  9. Four de passage continu selon l'une quelconque des revendications 1 à 8, dans lequel les conduites d'air chaud (30) débouchent dans la zone de chauffage (14) à une distance variable par rapport à la base du four.
  10. Four de passage continu selon l'une quelconque des revendications 1 à 8, dans lequel la chambre de combustion est disposée au-dessous de la base du tunnel du four.
EP95921694A 1994-06-10 1995-06-09 Four de passage continu Expired - Lifetime EP0717830B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4420295 1994-06-10
DE4420295A DE4420295C1 (de) 1994-06-10 1994-06-10 Durchlaufofen
PCT/DE1995/000778 WO1995034793A2 (fr) 1994-06-10 1995-06-09 Four de passage continu

Publications (2)

Publication Number Publication Date
EP0717830A1 EP0717830A1 (fr) 1996-06-26
EP0717830B1 true EP0717830B1 (fr) 1998-09-16

Family

ID=6520263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95921694A Expired - Lifetime EP0717830B1 (fr) 1994-06-10 1995-06-09 Four de passage continu

Country Status (6)

Country Link
US (1) US6116894A (fr)
EP (1) EP0717830B1 (fr)
JP (1) JP3047192B2 (fr)
AU (1) AU2668195A (fr)
DE (1) DE4420295C1 (fr)
WO (1) WO1995034793A2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007623C2 (nl) * 1997-11-26 1999-05-31 Dijk Heating B V Van Inrichting voor het verwarmen van fluïdum.
EP1036048B2 (fr) * 1997-12-02 2022-03-30 Corning Incorporated Procede de cuisson de corps en ceramique nid d'abeille
EP1049904B2 (fr) † 1997-12-22 2014-10-01 Corning Incorporated Four tunnel de cuisson de corps en ceramique nid d'abeille
NZ523920A (en) 2003-01-31 2005-11-25 Fonterra Co Operative Group Methods for extracting lipids from diary products using a near critical phase fluid
CN101316521B (zh) 2005-04-28 2014-06-25 恩兹默泰克有限公司 极性脂质混合物、其制备和应用
US8046932B2 (en) 2006-10-12 2011-11-01 Usnr/Kockums Cancar Company Method and apparatus for inhibiting pitch formation in the wet seal exhaust duct of a veneer dryer
US8196310B2 (en) 2007-02-09 2012-06-12 Usnr/Kockums Cancar Company Method and apparatus for controlling cooling temperature and pressure in wood veneer jet dryers
US20090206500A1 (en) * 2008-02-19 2009-08-20 Michael Maguire Pre-heated combustion air in treating ceramic components
EP2634161A4 (fr) 2010-10-29 2014-04-16 Sumitomo Chemical Co Procédé de production de corps cuit et four de cuisson utilisé aux fins du procédé
US9080235B2 (en) 2012-04-17 2015-07-14 Jamar International Corporation Composition and method for diffusion alloying of ferrocarbon workpiece
ITRE20120058A1 (it) * 2012-09-21 2014-03-22 Sacmi Forni Spa Forno per la cottura in continuo di laterizi su supporti a cassetta
DE102013010885A1 (de) * 2013-07-01 2015-01-22 Eisenmann Ag Verfahren zum Sintern von Sinterwerkstücken sowie Anlage hierfür
CN104359309B (zh) * 2014-09-25 2017-01-18 深圳市时代高科技设备股份有限公司 一种全自动真空预热炉

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DE736398C (de) * 1938-03-03 1943-06-15 Heimsoth Vollmer Dressler G M Tunnelofen fuer die Herstellung von Isoliersteinen
US2750680A (en) * 1952-08-02 1956-06-19 Oxy Catalyst Inc Method for treating materials
FR1255054A (fr) * 1960-01-21 1961-03-03 Stein & Roubaix Perfectionnement aux fours de chauffage de métaux à haute température, par flammedirecte, sans oxydation
US3437321A (en) * 1966-05-27 1969-04-08 B & K Machinery Int Ltd Regenerative paint drying system for continuous strip
ES375321A1 (es) * 1969-01-10 1972-05-01 S C E I Societa Construzioni E Perfeccionamientos en sistemas para el calentamiento de hornos continuos.
US3606279A (en) * 1969-10-08 1971-09-20 United States Steel Corp Apparatus for heat treating a sheet
US3787171A (en) * 1972-06-15 1974-01-29 Hunter Eng Co Closed loop, inert atmosphere, paint line oven heat source
US4140467A (en) * 1975-06-09 1979-02-20 Kenneth Ellison Convection oven and method of drying solvents
JPS53104610A (en) * 1977-02-08 1978-09-12 Shinagawa Refractories Co Tunnel kilns for reheating carbonaceous material impregnated with tar and pitch
US4133636A (en) * 1977-06-30 1979-01-09 Blu-Surf, Inc. Tentor
FR2420109A2 (fr) * 1978-03-13 1979-10-12 Machinery International Ltd Bk Fours de traitement thermique
DE3232294C1 (de) * 1982-08-31 1983-12-29 Rudolf 5160 Düren Brands Verfahren und Vorrichtung zum Sintern von Keramikformlingen, insbesondere von Weichferriten
US4503018A (en) * 1983-02-14 1985-03-05 Davy Mckee Corporation Desulfurization of phosphogypsum
US4662840A (en) * 1985-09-09 1987-05-05 Hunter Engineering (Canada) Ltd. Indirect fired oven system for curing coated metal products
DE3632918A1 (de) * 1986-09-27 1988-06-09 Haessler Andreas Tunnelofen mit nebenstrom-nachverbrennung
JP2543565B2 (ja) * 1988-03-31 1996-10-16 日本碍子株式会社 セラミックスの焼成に用いるトンネル炉
DE3908758C1 (en) * 1989-03-17 1990-04-19 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm, De Tunnel furnace for baking light bricks
DE3923887A1 (de) * 1989-07-19 1991-01-24 Manfred Leisenberg Kg Tunnelofen
JP2859987B2 (ja) * 1991-12-24 1999-02-24 日本碍子株式会社 連続焼成炉の温度制御装置

Also Published As

Publication number Publication date
WO1995034793A3 (fr) 1996-01-18
WO1995034793A2 (fr) 1995-12-21
JP3047192B2 (ja) 2000-05-29
US6116894A (en) 2000-09-12
JPH09502012A (ja) 1997-02-25
DE4420295C1 (de) 1995-10-26
AU2668195A (en) 1996-01-05
EP0717830A1 (fr) 1996-06-26

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