SE181908C1 - - Google Patents
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- Publication number
- SE181908C1 SE181908C1 SE181908DA SE181908C1 SE 181908 C1 SE181908 C1 SE 181908C1 SE 181908D A SE181908D A SE 181908DA SE 181908 C1 SE181908 C1 SE 181908C1
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- Sweden
- Prior art keywords
- furnace
- chamber
- oven
- transverse
- opening
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- Tunnel Furnaces (AREA)
Description
Uppfinnare: W Briigger Prioritet beglird pan den 15 februari 1950 (Schweiz) Foreliggande uppfinning, hanfor sig till en tunnelugn for varmebehandling av keramiskt gods, med varmeatervinning medelst en. gas, som i motstrom till ugnsgodset drives genoni ugnen medelst en i ugnens langdriktning verkande ventilator och vid vilken dessutom tvarventilatorer aro anordnade for att fa gasen att cirkulera i ugnstunnelns tvarriktning:. Inventor: W Briigger Priority beglird pan 15 February 1950 (Switzerland) The present invention relates to a tunnel furnace for heat treatment of ceramic goods, with heat theater extraction by means of a. gas, which, in countercurrent to the furnace material, is driven through the furnace by means of a fan acting in the longitudinal direction of the furnace and in which, in addition, transverse fans are arranged to cause the gas to circulate in the transverse direction of the furnace tunnel.
Hittills kanda ugnar av namnda slag aro foretradesvis avsedda for varmebehandling av metaller, varvid temperaturandringen per tklsenhet i allmanhet ej .spelar alltfor stor roll; med andra ord kan temperaturen fâ stiga eller .sjunka relativt snabbt och tillika fOrete vissa variationer. Bet är darfor utan vidare mojligt att utfora ugnen relativt kort, sa att endast mycket fi tvarventilationer erfordras, varigenom en dylik -ventilationsanordning icke blir i ekonomiskt hanseende alit-for betungande. Hitherto, furnaces of the type mentioned are preferably intended for heat treatment of metals, the temperature change per unit of weight generally not playing too great a role; in other words, the temperature can rise or fall relatively quickly and also cause some variations. It is therefore quite possible to make the oven relatively short, so that only a lot of transverse ventilation is required, whereby such a ventilation device does not become economically burdensome.
Vid tunnelugnar for den keramiska industrin aro emellertid driftsforhallanderta belt andra, och i synnerhet i forvarmningszonen ara endast helt sma temperaturandringar per tidsenhet tillatna, enar i annat fall sprickor uppsta i det gods, som skall brannas. Till foljd harav fa tunnelugnar for -varmebehandling av keramiskt gods en mycket avsevard langd, exempelvis 100 m orb mera; skulle man pa kali:I sat an.ordna den ena tvargaende ventilatorn efter den. andra, sa finge man en. eko.nouniskt orimlig losning. Trots: detta skulle mellan tvarventilatorerna, som i axiell led ha begransad verkan, strackor av avsevard langd befinnas foreligga, dar den naturliga temperaturfordelningen Ater installer sig. Darigenom skulle emellertid godset i dessa mellanrum, dar n.agon tvarcirkulation av luften ej ager rum, vara utsatt for stora temperaturgradienter, vilka skulle skada god set. In tunnel kilns for the ceramic industry, however, operating conditions are quite different, and in particular in the preheating zone only very small temperature changes per unit of time are permitted, otherwise cracks will occur in the goods to be burned. As a result, few tunnel kilns for heat treatment of ceramic goods have a very considerable length, for example 100 m orb more; should one pa kali: I sat arrange.an one transverse fan after it. others, so they caught one. eco.nounisk unreasonable solution. Despite this, between the transverse fans, which have a limited effect in the axial direction, stretches of considerable length are found to exist where the natural temperature distribution Ater settles. As a result, however, the goods in these spaces, where no cross-circulation of the air does not take place, would be exposed to large temperature gradients, which would damage good sets.
Foreliggande uppfinning har salunda till andamal att vid tunnelugnar av i ingressen na.mnt slag astadkomma en tvarcirkulation av ugnsatmosfaren, vilka ug,nar ej uppvisa nackdelarna med hittills anvanda jamforliga anordningar. The present invention thus has the object of achieving a transverse circulation of the furnace atmosphere in tunnel furnaces of the type mentioned in the preamble, which furnaces do not have the disadvantages of comparable devices used hitherto.
D.et utmarkande for tunnelughen enligt uppfinningen bestir dirt, att i ugnstaket kamrar aro anordnade, varvid varje kammare kommunicerar saval med trycksklan av en namnda kammare tillordnad tvarventilator som aven, over ett flertal, i bagge ugnssidovaggarna anordnade, i Oppningar utmynnande kanaler, med ugnsrummets nedre del, medan varje tvarventilators sugsida kommunicerar med ugnsrummets ovre del, varjarnte kamrarna ha en relativt den verksamma ugnsbredden .stor utstrackning i ugnens langdriktning och den sista oppning,en i varje karnmare orb den fOrsta oppningen 1 nastfoljande kammare ligga pa ett sa ringa avstand fran varandra, att den tack vare kamrarna och kanalerna resp. oppningarna mom omradet for varje kammare i ugnen uppnadda jamna tvarcirkulationen uppratthalles Oven i varje mellan tva narliggande kamrar belaget omrade. The distinguishing feature of the tunnel lug according to the invention is that in the furnace roof chambers are arranged, each chamber communicating with the pressure screen of a said chamber assigned a fan as also, over a plurality, in the troughs of the oven side cradles arranged in the openings opening channels. lower part, while the suction side of each rotary fan communicates with the upper part of the furnace chamber, each of the chambers having a relatively large extent in the longitudinal direction of the furnace and the last opening, one in each core orb the first opening 1 next chamber being at such a small distance from each other, that thanks to the chambers and channels resp. the openings in the area of each chamber in the furnace, the even transverse circulation obtained is maintained. Also in each area occupied between two adjacent chambers.
En utforingsform av tunnelugnen enligt uppfinningen kannetecknas darav, att tvarventilatorernas .sugsida stir i forbindelse med var sin i ugnens langdriktning forlopande, och I ugnstaket befintlig sugkammare, som Or forsedd med eti antal med ugnsrummets ovre del kommunicerande, tvargaende takoppningar, varjamte den sista takoppningen i varje kammare Jigger pa i huvudsak sa start avstand flan den .forsta takoppningen i nastfoljande kammare som avstandet mellan takoppningarna inbordes i en och samma kammare. An embodiment of the tunnel furnace according to the invention can be characterized in that the suction side of the double fans extends in connection with each suction chamber extending in the longitudinal direction of the furnace, and provided in the furnace ceiling with a number communicating with the upper part of the furnace chamber. each chamber Jigger at essentially the starting distance from the first roof opening in the next chamber as the distance between the roof openings is embedded in one and the same chamber.
Uppfinningen beskrives i det foljande med ledning av bifogade ritning, dar fig. 1 och 2 1 langd- resp. tvarsektion visa forvarmnings, 2— — zonen i en tunnelugn, varvid alla delar, som. .ej sta 1 direkt saraband med uppfinningen, -for enkelhetens skull uteIamnats. The invention is described in the following with reference to the accompanying drawing, in which Figs. cross section show preheating, 2— - zone in a tunnel furnace, all parts, as. Do not interfere directly with the invention, for the sake of simplicity.
Vid denna tunnelugn galler det en genom-gingsugn for branning av keramiskt gods, dar det är utomordentligt viktigt att det foreskrivna temperaturforloppet imiehalles mycket noggrant. Godset fares fram pa vagnar i ena riktningen, medan ugnsatomsfaren drives. naotsatt riktning genom ugnen medelst en lake visad ventilator. In this tunnel furnace there is a passage furnace for burning ceramic goods, where it is extremely important that the prescribed temperature course is maintained very carefully. The goods are transported on wagons in one direction, while the furnace atom hazard is driven. naotsat direction through the oven by means of a lake shown fan.
For att nu uppna en battre temperaturatjamning i ugnens forvarmningszon, insattes ett antal tvarventilatorer 3 i ugnstaket 1. Varje ventilator 3 star pa trycksidan i farbindelse riled en kammare 5, som farloper i ugnens langdriktning och stracker sig over hela dess bredd. Derma kammare 5 star Over de i sidovaggarna anordnade kanalerna 7 och appningarna 8 i forbindelse med ugnsrummets nedre del. Far varje avsnitt med en tvarventilator och sidovagg kan en. eller flera kanaler 7 anordnas. Oppningarna 8 aro i huvudsak jamnt fordelade i langdriktningen. In order to now achieve a better temperature equalization in the preheating zone of the furnace, a number of transverse fans 3 are inserted in the furnace ceiling 1. Each fan 3 stands on the pressure side in connection with a chamber 5, which runs in the longitudinal direction of the furnace and extends over its entire width. This chamber 5 is above the channels 7 and the openings 8 arranged in the side cradles in connection with the lower part of the oven space. Do each section with a turret fan and side cradle can one. or several channels 7 are provided. The openings 8 are substantially evenly distributed in the longitudinal direction.
Vid den i fig. 1 loch 2 visade utforingsformen av uppfinningen star ventilatorernas 3 sugsida dessutom i forhindelse med en. avenledes i takmuren anordnad sugkammare 4, vilken liksom tryekkammaren 5 farloper i ugnens langdriktning och &tracker sig over hela dess bredd. Denna sugkammare 4 star over ett antal i langdriktningen likformigt fordelade tvargaende takoppningar 6 i forhindelse med den. owe delen. av ugnsrummet. Det air emellertid aven mojligt att utelamna sugkammaren 4 och de tvargaende iippningarna 6. varvid ventilatorn 3, anordnas i taket pa sadant satt, att den suger in ugnsatmosfaren omedelbart fran ugnskammarens alma del. Pa detta satt kan en i praktiken oftast an.vand, nagot forenklad och billigare konstruktion uppnas med nastan lika god verkan. In the embodiment of the invention shown in Figs. 1 and 2, the suction side of the fans 3 is also in relation to one. suction chamber 4 arranged in the roof wall, which, like the pressure chamber 5, runs in the longitudinal direction of the furnace and extends over its entire width. This suction chamber 4 stands over a number of longitudinally evenly distributed transverse roof openings 6 in relation to it. owe parts. of the oven compartment. However, it is also possible to omit the suction chamber 4 and the transverse openings 6, the fan 3 being arranged in the ceiling in such a way that it sucks in the furnace atmosphere immediately from the general part of the furnace chamber. In this way, in practice one can usually use, somewhat simplified and cheaper construction can be achieved with almost as good an effect.
Luftens cirkulation, som astadkommes av den tvargaende ventilatorn 3, antydes i fig. 1 och 2 medelst pilar. Den varma luften omedelbart under ugnstaket suges in genom takappningarna 6 i sugkammaren 4 och drives darifran medelst ventilatorn 3 in i tryckkammaren 5. Fran denna kommer luften darefter Over sidokanalerna 7 Ater till ugnsrummet, namligen omedelbart over ugnsgolvet 2. Upsatmosfaren eirkulerar salunda fullstandigt i funnelns tvarriktning. Genova den relativt stora utstrackningen av sug- och tryekkamrarna i det av varje tvargaende ventilator paverkade avsnittet ar antalet erforderliga ventilatorer for en tvargaende eirkulation i forvarmningszonen mycket lit-en. Darigenom att praktiskt taget inga dada zoner mellan de olika ventilatoravsnitten farefinnas, fororsakas vidare ingen otillaten ojamahet hos ternperaturgradienten. Temperaturutjamningen i tunnelareans avre och nedre del pa grund av den tvargaende cirkulationen av ugnsatmos faren mojliggar en noggrannare reglering av temperaturforloppet i ugnen, sa att kvaliteten hos den hehandlade varan ytterligare forbattras. The air circulation, which is provided by the transverse fan 3, is indicated in Figs. 1 and 2 by means of arrows. The hot air immediately under the oven roof is sucked in through the roof openings 6 in the suction chamber 4 and is driven from there by means of the fan 3 into the pressure chamber 5. From here the air then comes over the side ducts 7 back to the oven room, namely immediately above the oven floor 2. The up atmosphere is completely circulating in the funnel. . Due to the relatively large extent of the suction and pressure chambers in the section affected by each transverse fan, the number of fans required for a transverse air circulation in the preheating zone is very small. Furthermore, in that virtually no dead zones between the different fan sections are found, no impermissible imbalance of the temperature gradient is caused. The temperature equalization in the lower and lower part of the tunnel area due to the transverse circulation of the furnace atmosphere allows a more precise regulation of the temperature course in the furnace, so that the quality of the treated product is further improved.
Vid tunnelugnar for keramiskt gods far den keramiska varan, som bekant mycket hastigt nedkylas i omradet fran den maximala branningstemperaturen och ned till en c:a 700° C, vilket innebar ett stort temperaturfall per tidsenhet. Varmeatervinningen fran zonen med den hastiga avkylningen kan numera mycket val astadkommas i en ugn, som fir fiirsedd med tvareirkulation av har beskrivet slag. En. dylik kombinerad anordning framgar av fig. 3, dar en tunnelugn visas i langdsnitt, vid vii-ken. godset fares i pilriktningen och ytterligare kylluft inblases i avkylningszonen C genom sarskilda, fran ugnsrummet avskilda. kanaler. Denna kylluft infores a ena sidan vid 14 for kylning av taket och A andra sidan vid 11 for kylning av sidovaggarna. F8r aft an atervinna varmet fran zonen med hastig avkylning, tillfores bagge luftstrommarna over en gemensam liana). 12 under kringgaende av varmezonen B till forvarmningszonen A, sa att denna luft pa mycket bekvamt satt kan info-ms tvarventilatorernas 13 cirkulationskrets. Den anskade uppdelningen av varmluften pa de olika avsnitten i forvarmningszonen A sker genom enkla, pa ritningen ej visade spj all, varigenom det utan vidare blir mojligt att efter anskan reglera temperaturfiirloppet. In tunnel kilns for ceramic goods, the ceramic product, which is known to cool down very rapidly in the area from the maximum firing temperature down to about 700 ° C, which meant a large temperature drop per unit time. The heat meter recovery from the zone with the rapid cooling can now be achieved with a great deal of choice in an oven which is provided with transverse circulation of the type described. One. such a combined device is shown in Fig. 3, where a tunnel furnace is shown in longitudinal section, at the viik. the goods are moved in the direction of the arrow and additional cooling air is blown into the cooling zone C through separate, separated from the oven compartment. channels. This cooling air is introduced on one side at 14 for cooling the roof and on the other side at 11 for cooling the side cradles. Before recovering the heat from the zone with rapid cooling, the air drums are fed over a common liana). 12 while bypassing the heating zone B to the preheating zone A, so that this air can very comfortably inform the circulation circuit of the transverse fans 13. The desired division of the hot air into the various sections in the preheating zone A takes place through simple splints, not shown in the drawing, whereby it becomes possible to regulate the temperature flow without request.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE181908T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE181908C1 true SE181908C1 (en) | 1962-01-01 |
Family
ID=41969990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE181908D SE181908C1 (en) |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE181908C1 (en) |
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0
- SE SE181908D patent/SE181908C1/sv unknown
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