DK151596B - TUNNEL OVEN FOR BURNING OF CERAMIC GOODS - Google Patents
TUNNEL OVEN FOR BURNING OF CERAMIC GOODS Download PDFInfo
- Publication number
- DK151596B DK151596B DK425677AA DK425677A DK151596B DK 151596 B DK151596 B DK 151596B DK 425677A A DK425677A A DK 425677AA DK 425677 A DK425677 A DK 425677A DK 151596 B DK151596 B DK 151596B
- Authority
- DK
- Denmark
- Prior art keywords
- furnace
- gas
- tunnel
- outlet
- cooling
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Description
i 151596in 151596
Opfindelsen angår en tunnelovn med direkte fyring og til brænding af keramiske varer, især sådanne som indeholder brændbare eller forgasbare substanser, og med en første afgang, der tjener til lede ovngas fra ovnen ud i den omgivende atmosfære, og en anden ovn-5 gasafgang, hvorfra den gennem denne anden afgang fjernede gas kan genindføres i ovnen efter eller i ovnens højtemperaturområde regnet i varernes transportretning gennem ovnen.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a direct-firing tunnel furnace for the burning of ceramic products, in particular those containing combustible or gasifiable substances, with a first outlet serving to direct furnace gas from the furnace into the ambient atmosphere, and a second furnace-gas outlet, from which the gas removed through this second exit can be reintroduced into the furnace after or in the high temperature range of the furnace, calculated in the direction of transport of the goods through the furnace.
Ved en kendt tunnelovn af denne art ("Ziegelindustrie”, hæfte 11, 1972, side 521) udtages en del af ovngassen fra opvarmningszonen og 10 indføres igen i tunnelovnen i kølezonen. Den endelige bortledning af røggassen sker ved den kendte ovn ved enden af ovnen, altså ved indføringsstedet for de varer, der skal brændes. Temperaturen for den ovngas, der endelig ledes ud i atmosfæren, søges ved den kendte tunnelovn - svarende til de hidtil inden for fagområder herskende 15 forestillinger - holdt så lav som mulig.In a known tunnel furnace of this kind ("Ziegelindustrie", booklet 11, 1972, page 521), part of the furnace gas is taken from the heating zone and 10 is again introduced into the tunnel furnace in the cooling zone. The final discharge of the flue gas takes place at the known furnace at the end of the furnace. The temperature of the furnace gas finally discharged into the atmosphere is searched by the well-known tunnel furnace - similar to the 15 performances prevailing so far in the art - kept as low as possible.
En væsentlig ulempe ved den kendte tunnelovn består i, at røggasserne fra denne ovn altid er fyldt med carboniseringsgasser og brændbare bestanddele, når al røggassen ledes ud i atmosfæren ved enden af ovnen. Da der i opvarmningszonen kun udtages en del af 20 ovngassen, som igen indføres i kølezonen, medens al ovngassen på strækningen mellem hovedbrændezonen og ovnudgangen tilføres forgasbare substanser, indeholder også røggassen en væsentlig del af brændbare gasformige og brændbare substanser, der kan frembringe væsentlige lugtgener. 1 2 3 4 5 6A major disadvantage of the known tunnel oven is that the flue gases from this furnace are always filled with carbonizing gases and combustible components when all the flue gas is discharged into the atmosphere at the end of the furnace. Since in the heating zone only a portion of the furnace gas is withdrawn, which in turn is introduced into the cooling zone, while all the furnace gas on the line between the main burning zone and the furnace outlet is supplied with gasifiable substances, the flue gas also contains a substantial part of combustible gaseous and combustible substances which can produce significant odor nuisances. 1 2 3 4 5 6
Fra dansk patentskrift nr. 107.668 kendes en tunnelovn af den ind 2 ledningsvis angivne art, hvor der ved indføringsenden for varerne 3 ledes ovngas ud i den omgivende atmosfære. Der findes ved denne 4 kendte tunnelovn også andre røggasafgange, gennem hvilke der 5 udledes ovngas, som genindføres i tunnelovnen. Ovngassens strøm- 6 ningsretning bringes imidlertid til at skifte rytmisk, så at den kommer til at foretage en pulserende bevægelse i retning henholdsvis med og modsat bevægelsesretningen for de varer, der skal brændes.From Danish Patent Specification No. 107,668, a tunnel furnace of the kind specified in 2 is known, where at the insertion end of the goods 3 furnace gas is discharged into the ambient atmosphere. At this 4 known tunnel furnace there are also other flue gas exits through which 5 furnace gases are discharged, which are reintroduced into the tunnel furnace. However, the flow direction of the furnace gas is caused to change rhythmically so that it will make a pulsating movement in the direction with and opposite to the direction of movement of the goods to be burned.
151596 2 På basis af denne kendte teknik søges ved opfindelsen tilvejebragt en tunnelovn af den omhandlede art, ved hvilken afgangsgasserne i mindre grad end ved de kendte indeholder uforbrændte bestanddele, og som er mere økonomisk i brug end de kendte ovne.Based on this prior art, the invention seeks to provide a tunnel furnace of the kind in question, in which the exhaust gases contain, to a lesser extent, than the known ones, which are more economically in use than the known furnaces.
5 Man skal altså kunne opnå de i dag forlangte ringe emissionsværdier med stor driftsteknisk sikkerhed uden alt for store omkostninger. Endvidere skal ovnen i det mindste i vidt omfang kunne forhindre det hidtil uundgåelige udslip af uforbrændte brændbare gasser i atmosfæren .5 It is therefore possible to achieve the low emission values demanded today with high operational technical certainty without excessive costs. Furthermore, the furnace must at least to a large extent be able to prevent the hitherto inevitable release of unburnt combustible gases into the atmosphere.
10 Tunnelovnen ifølge opfindelsen er ejendommelig ved, at den første ovngasafgang regnet i varernes transportretning ligger efter den anden ovngasafgang og på et sted i ovnen, hvor temperaturen for ovngassen er højere end forgasningstemperaturen for de nævnte substanser i de keramiske varer.The tunnel furnace according to the invention is characterized in that the first furnace gas discharge calculated in the transport direction of the goods lies after the second furnace gas outlet and at a location in the furnace where the temperature of the furnace gas is higher than the gasification temperature of said substances in the ceramic products.
15 Ved tunnelovnen ifølge opfindelsen kan de forgassede, brændbare substanser gennem den anden ovngasafgang i varernes transportretning føres til et sted i ovnen, hvor temperaturen er tilstrækkelig høj til, at der kan opnås en forbrænding af disse substanser. Da den første ovngasafgang, gennem hvilken ovngassen definitivt føres bort 20 f^a ovnen, regnet i varetransportertningen ligger et stykke efter den nævnte anden afgang, vil den ovngas, der definitivt føres bort fra ovnen have en forholdsvis høj temperatur, hvilket er i modsætning til, at man ved de kendte ovne fjerner ovngassen på et sted, hvor dens temperatur er lavest mulig.In the tunnel furnace according to the invention, the gasified flammable substances can be passed through the second furnace gas outlet in the direction of transport of the goods to a place in the furnace where the temperature is sufficiently high for combustion of these substances to be obtained. Since the first furnace gas through which the furnace gas is definitively carried away from the furnace, calculated in the transport of goods, is a short distance after said second departure, the furnace gas which is definitively removed from the furnace will have a relatively high temperature, which is in contrast to that by the known furnaces, the furnace gas is removed in a place where its temperature is lowest.
25 Fjernelsen af ovngassen ved lav temperatur betyder, at en økonomisk varmegenvinding fra ovngassen ikke er mulig. Varmegenvinding fra gas med lav temperatur kræver kostbare og dyre varmevekslere, der ikke arbejder rentabelt, og som yderligere er udsat for stærk korrosion. 125 The removal of the furnace gas at low temperature means that economical heat recovery from the furnace gas is not possible. Heat recovery from low temperature gas requires expensive and expensive heat exchangers that are not profitable and which are further exposed to strong corrosion. 1
Den ovngas, der ved ovnen ifølge opfindelsen fjernes gennem den første afgang, indeholder praktisk talt ikke flere forgasbare eller 3 151596 brændbare substanser. Den har derfor en kemisk sammensætning, der med sikkerhed opfylder de gældende miljøbeskyttelsesbestemmelser. Desuden har den bortledte ovngas et temperaturniveau, der muliggør genvinding af spildvarmen. Der kan i afgangsstrømmen fra den første 5 ovngasafgang på yderst simpel måde indkobles en varmeveksler, med hvilken den i ovngassen indeholdte spildvarme delvis lader sig genvinde.The furnace gas which is removed by the furnace according to the invention through the first outlet contains practically no more gasifiable or combustible substances. It therefore has a chemical composition that complies with the applicable environmental protection regulations. In addition, the discharged furnace gas has a temperature level which allows the recovery of the waste heat. In the discharge stream from the first furnace gas outlet, a heat exchanger can be connected in a very simple manner with which the waste heat contained in the furnace gas is partially recoverable.
Ved en foretrukken udførelsesform for ovnen ifølge opfindelsen er den første afgang anbragt i hovedbrændzonen eller ildzonen eller i dennes 10 umiddelbare nærhed.In a preferred embodiment of the furnace according to the invention, the first outlet is located in the main combustion zone or fire zone or in the immediate vicinity thereof.
Der kan fordelagtigt findes to eller flere første ovngasafgange på steder i ovnen, hvor temperaturen af ovngassen er højere end antændelses- eller forgasningstemperaturen for de nævnte substanser i de keramiske varer, og der kan da findes et tilsvarende antal af de 15 nævnte andre gasafgange og dermed også af gastilgange, gennem hvilke gassen fra disse andre gasafgange genindføres i ovnen.Advantageously, two or more first furnace gas exits can be found at locations in the furnace where the temperature of the furnace gas is higher than the ignition or gasification temperature of the said substances in the ceramic products, and a corresponding number of the other second gas exits can then be found, and thus also of gas inputs through which the gas from these other gas exits is reintroduced into the furnace.
Ifølge opfindelsen foreslås det endvidere, at der efter en i ovnen værende kølezone er anbragt efter en ved hjælp af et afspærringsorgan fra den omgivende luft adskilt efterkølingszone, i hvilken de 20 brændte varer udsættes for frisk luft.According to the invention, it is further proposed that after a cooling zone in the furnace is arranged after a cooling zone separated from the ambient air by means of a shut-off means, in which the 20 burnt products are exposed to fresh air.
Ifølge opfindelsen kan der efter varmeudveksleren være anbragt en blæser med reverserbar strømningsretning.According to the invention, a fan with reversible flow direction may be arranged after the heat exchanger.
I en ledning, der forbinder den anden afgang med en tilgang for den gas, der genindføres i ovnen, kan der være anbragt en blæser med 25 reverserbar strømningsretning, ved hjælp af hvilken hovedgasstrømmen i tunnelovnens brændekanal kan bevæges pulserende i pilgrimstakt, og det har da vist sig at være hensigtsmæssigt, at blæserne med reverserbar strømningsretning for hovedgasstrømmen og for afgangsgasstrømmen kobles synkront. De to gasstrømme er altså 30 afstemt efter hinanden.In a conduit connecting the second outlet to an inlet for the gas re-introduced into the furnace, a blower having a reversible flow direction may be provided by means of which the main gas flow in the tunnel duct's firing channel can be pulsated in a pilgrimage rate, and it then has It is found to be appropriate that the fans with reversible flow direction for the main gas stream and for the exhaust gas stream be coupled synchronously. The two gas streams are thus 30 aligned.
4 151596 I det følgende vil en foretrukken udførelsesform for ovnen ifølge opfindelsen blive nærmere beskrevet under henvisning til tegningen, på hvilken fig. 1 skematisk viser en tunnelovn, der drives i overensstemmelse 5 med en sædvanlig kendt fremgangsmåde, fig. 2 et temperaturdiagram svarende til tunnelovnen ifølge opfindelsen, og fig. 3 en til fig. 2 svarende skematisk afbildning af tunnelovnen ifølge opfindelsen.In the following, a preferred embodiment of the oven according to the invention will be described in greater detail with reference to the drawing, in which FIG. 1 is a schematic view of a tunnel furnace operated in accordance with a conventional method; FIG. 2 is a temperature diagram corresponding to the tunnel furnace according to the invention; and FIG. 3 is a view of FIG. 2 is a schematic representation of the tunnel oven according to the invention.
10 Først vil fig. 1 blive omtalt: I en tunnelovn 1 strømmer med punkterede linjer symboliseret røggas 6 i den med en pil 6a angivne retning i modstrøm til transportvognene 7, hvis transportretning er symboliseret med en pil 7a. Røggassen forlader ovnen foran et lukkespjæld 3 og føres ved hjælp af en venti-15 lator 4 til en skorsten 5. Den viste kendte tunnelovn har loftsfyring.10 First, FIG. 1 is mentioned: In a tunnel furnace 1, dashed lines symbolize flue gas 6 in the direction indicated by an arrow 6a countercurrent to the transport carts 7, the direction of transport being symbolized by an arrow 7a. The flue gas exits the furnace in front of a shut-off valve 3 and is conducted by means of a ventilator 4 to a chimney 5. The known tunnel furnace shown has ceiling firing.
Herefter vil fig. 2 og 3, der svarer til hinanden, blive omtalt:Next, FIG. 2 and 3, which are similar, are discussed:
Også ved tunnelovnen ifølge opfindelsen kører brændevognene 7 i den med pilen 7a angivne retning fra venstre mod højre gennem tunnelovnen. Røggassen strømmer bort gennem skorstenen. Fristlufttilførselen 20 kan ved fremgangsmåden ifølge opfindelsen reguleres ved hjælp af et mellem en kølezone E og en endekølezone anbragt skydespjæld 19.Also at the tunnel furnace according to the invention, the fire trucks 7 travel in the direction indicated by arrow 7a from left to right through the tunnel furnace. The flue gas flows through the chimney. The supply air 20 can be controlled by the method according to the invention by means of a slider 19 arranged between a cooling zone E and an end cooling zone.
Bevægelsen af brændevognene med de keramiske emner sker i modstrøm til hovedgasstrømmen, der er symboliseret med en pil 10.The movement of the fire trucks with the ceramic blanks takes place countercurrent to the main gas flow, which is symbolized by an arrow 10.
I princippet kan tunnelovnen ifølge opfindelsen opdeles i zoner A til 25 F. Zonen A er den indifferente opvarmningszone med temperaturer under 200°C. I zone A foregår ingen forgasningsprocesser. Derefter kommer zone B med et temperaturområde fra ca. 200°C til 700°C, i hvilken de brændbare stoffer afgasses fra de keramiske emner. I den derefter følgende zone C er de varer, der skal brændes, afgasset og 30 opvarmes yderligere, fx fra 700°C til 1200°C. Nu følger hovedbrænde-zonen D. Her tilføres tunnelovnen størstedelen af det nødvendige 5 151596 brændstof. I den efterfølgende kølezone E afkøles de brændte varer til ca. 850°C, og i den derefter følgende endekølezone foregår afkølingen til den temperatur, ved hvilken de brændte varer forlader tunnelovnen.In principle, the tunnel furnace according to the invention can be divided into zones A to 25 F. Zone A is the inert heating zone with temperatures below 200 ° C. In zone A, no gasification processes are carried out. Then zone B comes with a temperature range of approx. 200 ° C to 700 ° C, in which the combustible substances are degassed from the ceramic blanks. In the following zone C, the products to be burned are degassed and further heated, for example from 700 ° C to 1200 ° C. The main fuel zone now follows D. Here, the tunnel furnace is supplied with the majority of the required fuel. In the subsequent cooling zone E, the burnt products are cooled to approx. 850 ° C, and in the subsequent end cooling zone the cooling takes place at the temperature at which the burnt products leave the tunnel oven.
5 Medens røggasserne ved de kendte tunnelovne udledes fra zone A eller delvis fra zone B, ser der ved tunnelovnen ifølge opfindelsen ingen røggasafgang på dette sted. Ved tunnelovnen ifølge opfindelsen udledes den røggas, der er bestemt til at forlade tunnelovnen, i stedet fra fyringszonen eller hovedbrændezonen D eller fra de dertil 10 grænsende zoner, hvor røggassen har en høj temperatur. Den kan eksempelvis delvis udtages med høj temperatur fra kølezonen E.5 While the flue gases at the known tunnel furnaces are discharged from zone A or partially from zone B, the flue gas furnace according to the invention sees no flue gas discharge at this location. In the tunnel furnace according to the invention, the flue gas intended to leave the tunnel furnace is instead discharged from the firing zone or main burning zone D or from the adjacent zones where the flue gas has a high temperature. For example, it can be partially extracted at high temperature from the cooling zone E.
Hovedgasstrømmen 10 bliver i tunnelovnens brændekanal ført gennem zonerne B og A, hvor den over omløbsledninger 11, i hvilke der sidder blæsere 12, føres tilbage og igen indføres i ovnen i kølezonen 15 eller i hovedbrændezonen. Der kan endvidere findes flere parallelt forbundne omløbsledninger. Hovedgasstrømmen kan udtages på flere steder i opvarmningszonen og igen på flere steder indføres i kølezonen samt til dels i fyringszonen.The main gas stream 10 is passed through the burn channel of the tunnel furnace through zones B and A, where it is fed back and over again into the furnace in the cooling zone 15 or in the main burning zone through the overflow lines 11 in which there are fans 12. Furthermore, several parallel wiring lines can be found. The main gas flow can be sampled at several locations in the heating zone and again at several locations introduced into the cooling zone as well as partly in the heating zone.
Afgangsgasstrømmen 13, der er mindre end hovedgasstrømmen 10, 20 udtages af tunnelovnen i området med høj temperatur ved en røggas temperatur på ca. 600°C til 1200°C. Afgangsgassen kan også udtages på flere steder i området med høj temperatur og helt hen til kølezonen. Temperaturen skal på udtagningsstedet eller -stederne være højere end forgasningstemperaturen for de brændbare stoffer i em-25 nerne i den som afgasningszone tjenende opvarmningszone B, så at der ikke når uforbrændt carboniseringsgas ind i afgangsskorstenen.The exhaust gas stream 13, which is smaller than the main gas stream 10, 20, is taken out of the tunnel furnace in the high temperature range at a flue gas temperature of approx. 600 ° C to 1200 ° C. The exhaust gas can also be extracted at several locations in the high temperature area and all the way to the cooling zone. The temperature at the sampling point (s) must be higher than the gasification temperature of the combustible substances in the furnaces of the heating zone B serving as a degassing zone so that no unburnt carbonization gas enters the exhaust chimney.
Således kommer al carboniseringsgas samt flygtige skadelige stoffer via omløbsledningerne 11 gennem ovnens fyringszone og forbrænder dér fuldstændigt ved den højeste temperatur. 1Thus, all carbonization gas and volatile harmful substances through the bypass lines 11 pass through the furnace's firing zone and burn there completely at the highest temperature. 1
Afgangsgasstrømmen eller røggasstrømmen med høj temperatur (ca.The exhaust gas stream or the high temperature flue gas stream (approx.
600°C til 1000°C kan anvendes til opvarmningsformål. Ved hjælp af røggasstrømmen kan fx varmeveksleren 15 anvendes til luftopvarmning eller dampdannelse. Den afkølede røggas føres af en blæser 16 ind i skorstenen 5.600 ° C to 1000 ° C can be used for heating purposes. By means of the flue gas stream, for example, the heat exchanger 15 can be used for air heating or steam generation. The cooled flue gas is fed into the chimney 5 by a fan 16.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2643406A DE2643406C3 (en) | 1976-09-27 | 1976-09-27 | Tunnel furnace with direct firing |
| DE2643406 | 1976-09-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK425677A DK425677A (en) | 1978-03-28 |
| DK151596B true DK151596B (en) | 1987-12-14 |
| DK151596C DK151596C (en) | 1988-05-24 |
Family
ID=5988948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK425677A DK151596C (en) | 1976-09-27 | 1977-09-26 | TUNNEL OVEN FOR BURNING OF CERAMIC GOODS |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT384101B (en) |
| CH (1) | CH628972A5 (en) |
| DE (1) | DE2643406C3 (en) |
| DK (1) | DK151596C (en) |
| FR (1) | FR2365766A1 (en) |
| NL (1) | NL7710546A (en) |
| NO (1) | NO147533C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1098416B (en) * | 1978-09-04 | 1985-09-07 | Salviati Impianti Spa | PROCEDURE FOR THE PRODUCTION OF BRICKS AND PLANT FOR THE IMPLEMENTATION OF THAT PROCEDURE |
| ATA312180A (en) * | 1980-06-12 | 1986-03-15 | Walter Ing Rieger | METHOD FOR BURNING THIN-WALLED CERAMIC MOLDINGS CONTAINING IN PARTICULAR CORE HOLES, AND SYSTEM FOR IMPLEMENTING THE METHOD |
| DE3042708C2 (en) * | 1980-11-10 | 1986-07-17 | Rudolf 2106 Bendestorf Riedel | Tunnel furnace with two parallel channels |
| WO1982003118A1 (en) * | 1981-03-11 | 1982-09-16 | Andreas Haessler | Cassette and method for firing ceramic forms |
| AT376959B (en) * | 1982-09-17 | 1985-01-25 | Maerz Ofenbau | METHOD FOR PRODUCING CEMENT CLINKER |
| DE3324764C1 (en) * | 1983-07-08 | 1985-02-14 | Air Fröhlich AG für Energierückgewinnung, Arbon | Process for the operation of a throughflow kiln, especially a tunnel kiln, for the firing of ceramic mouldings and apparatus for the performance of this process |
| DE3516058C2 (en) * | 1984-08-21 | 1986-07-17 | Institut für Ziegelforschung Essen e.V., 4300 Essen | Tunnel furnace for firing ceramic blanks and method for operating such a tunnel furnace |
| DE3517866A1 (en) * | 1985-05-17 | 1986-11-20 | C. Keller GmbH u. Co KG, 4530 Ibbenbüren | Method for direct firing of a tunnel furnace as well as tunnel furnace for implementing the method |
| DE3525771A1 (en) * | 1985-07-19 | 1987-01-22 | Haessler Andreas | Tunnel furnace with waste gas flow which is low in harmful substances |
| AT383886B (en) * | 1985-12-23 | 1987-09-10 | Walter Ing Rieger | METHOD FOR PRODUCING BRICKS FROM CLAY SHAPES AND SYSTEM FOR IMPLEMENTING THE METHOD |
| DE3605780C1 (en) * | 1986-02-22 | 1987-06-19 | Manfred Zimmermann | Tunnel furnace for baking raw graphite electrodes |
| DE3627050C1 (en) * | 1986-08-09 | 1991-11-28 | Lingl Anlagenbau | Tunnel kiln for the reducing firing of facing bricks |
| DE4023432C2 (en) * | 1989-10-18 | 1995-05-24 | Werner Ing Grad Strohmenger | Tunnel kiln |
| AT401817B (en) * | 1993-12-01 | 1996-12-27 | Rieger Walter | METHOD FOR BURNING CERAMIC MOLDINGS AND SYSTEM FOR IMPLEMENTING THE METHOD |
| DE4423221A1 (en) * | 1994-07-01 | 1996-01-04 | Lingl Anlagenbau | Heat transfer in the tunnel oven |
| IT1309033B1 (en) * | 1999-03-08 | 2002-01-15 | Tecnochimica Sassolese S R L | CONTINUOUS OVEN PERFECTED FOR HEAT TREATMENT OF MATERIALS |
| DE102011100736A1 (en) | 2011-05-06 | 2012-11-08 | Andreas Hässler | Method for operating e.g. tunnel furnace used for firing brick, involves directing exhaust gas stream from tunnel furnace to waste heat boiler for generating electric power utilized for drying and heating processes of furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1226477B (en) * | 1962-02-05 | 1966-10-06 | Kollergeneratoren Und Ofenbau | Method for heating a kiln, in particular a tunnel kiln |
| DK107668C (en) * | 1965-03-01 | 1967-06-19 | Andreas Haessler | Method for firing during operation of feed-through furnaces for ceramic products and furnace for carrying out the process. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1413674A (en) * | 1964-11-09 | 1965-10-08 | Robert Aebi A G | Method of operating a tunnel kiln and device for implementing the method |
| FR1470155A (en) * | 1966-02-28 | 1967-02-17 | Firing process and device for implementing this process for operating continuous circulation furnaces for ceramic products | |
| DE1303473C2 (en) * | 1966-04-06 | 1974-01-17 | Keller Ofenbau Gmbh, 4533 Laggenbeck | PROCESS FOR CONTINUOUS BURNING OF CERAMIC MATERIALS IN TUNNEL FURNACES AND TUNNEL FURNACES TO PERFORM THE PROCESS |
| FR2038592A5 (en) * | 1969-03-19 | 1971-01-08 | Koho Es Gepipari Miniszterium | Tunnel kiln for the firing of refractory - ceramic products |
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1976
- 1976-09-27 DE DE2643406A patent/DE2643406C3/en not_active Expired
-
1977
- 1977-09-22 CH CH1158377A patent/CH628972A5/en not_active IP Right Cessation
- 1977-09-26 DK DK425677A patent/DK151596C/en not_active IP Right Cessation
- 1977-09-26 NO NO773289A patent/NO147533C/en unknown
- 1977-09-26 FR FR7728882A patent/FR2365766A1/en active Granted
- 1977-09-27 NL NL7710546A patent/NL7710546A/en not_active Application Discontinuation
- 1977-09-27 AT AT0690077A patent/AT384101B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1226477B (en) * | 1962-02-05 | 1966-10-06 | Kollergeneratoren Und Ofenbau | Method for heating a kiln, in particular a tunnel kiln |
| DK107668C (en) * | 1965-03-01 | 1967-06-19 | Andreas Haessler | Method for firing during operation of feed-through furnaces for ceramic products and furnace for carrying out the process. |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7710546A (en) | 1978-03-29 |
| DK425677A (en) | 1978-03-28 |
| NO147533B (en) | 1983-01-17 |
| AT384101B (en) | 1987-10-12 |
| ATA690077A (en) | 1987-02-15 |
| FR2365766A1 (en) | 1978-04-21 |
| DE2643406C3 (en) | 1980-07-03 |
| DE2643406A1 (en) | 1978-04-06 |
| DK151596C (en) | 1988-05-24 |
| CH628972A5 (en) | 1982-03-31 |
| DE2643406B2 (en) | 1979-10-11 |
| FR2365766B1 (en) | 1982-12-17 |
| NO147533C (en) | 1983-04-27 |
| NO773289L (en) | 1978-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |