EP0717830B1 - Four de passage continu - Google Patents
Four de passage continu Download PDFInfo
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 229910001035 Soft ferrite Inorganic materials 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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)
- 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).
- Four de passage continu selon la revendication 1, dans lequel chaque conduite d'air chaud (30) possède sa propre conduite d'air froid (32).
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
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)
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 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1994
- 1994-06-10 DE DE4420295A patent/DE4420295C1/de not_active Expired - Lifetime
-
1995
- 1995-06-09 JP JP8501472A patent/JP3047192B2/ja not_active Expired - Fee Related
- 1995-06-09 WO PCT/DE1995/000778 patent/WO1995034793A2/fr active IP Right Grant
- 1995-06-09 US US08/596,154 patent/US6116894A/en not_active Expired - Lifetime
- 1995-06-09 AU AU26681/95A patent/AU2668195A/en not_active Abandoned
- 1995-06-09 EP EP95921694A patent/EP0717830B1/fr not_active Expired - Lifetime
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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