SE193313C1

SE193313C1 -

Info

Publication number: SE193313C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: W Grunewald och H Kramer Foreliggande uppfinning hanfor sig till en konverterskorsten med avskiljaranordningar och med en nedtill monterad inblasningshuv samt utrensbar skorstensbotten eller -samlingstratt. Inventors: W Grunewald and H Kramer The present invention relates to a converter chimney with separator devices and with a blow-in hood mounted at the bottom and a removable chimney bottom or collecting funnel.

De kdnda stoftavskiljarna fOr konverterskorstenar A.stadkomma antingen endast en afullstandig staftavskiljning, emedan det galler att avskilja mycket stora mangder stoft I forhallandevis stora skorstenar, i vilka temperaturen dessutom dr hog, eller med exernpelvis hialp av elektriska avskiljare en avskiljning, som är jainforelsevis komplicerad oak kraver en standig overvakning. The known dust separators for converter chimneys A. provide either an incomplete dust separation, since it is necessary to separate very large amounts of dust in relatively large chimneys, in which the temperature is also high, or with the aid of electric separators, for example, a separation which is complicated. requires constant monitoring.

Genom foreliggande uppfinning astadkommes pa ett enkelt, driftsakert satt en mycket god stoftavskiljning aven, vid den hoga temperatur och de ovriga forsvarande omstandigheter, som forekopima vid konverterdrift. Den enligt uppfinningen foreslagna, med inblisningshuven forbnudna konverterskorstenen utmarker sig genom att den har sldta, runda innervaggar atminstone i den, zon, som trdffas av grovt, vidhAftbart, fran konvertern utst6tt material, -vidare genom att den är forsedd med anordningar for att genom vatten eller forangning av varmvatten kraftigt kylas sa att det vidhaftande, utstOtta materialet Mlles undan och bringas att krympa, och att symmetriskt utformade stoftavskiljarcykloner av i och for sig kant slag Aro anordnade ovanfOr och runt den kylda zonen vid Over5.nden av skorstensroret, vars byre utloppsoppning ãr tillsluten air ett vattenkylt lock. The present invention provides in a simple, reliable manner a very good dust separation even, at the high temperature and the other defensive conditions, which occur during converter operation. The converter chimney proposed according to the invention, connected to the inlet hood, is distinguished by having salty, round inner cradles at least in the zone which is struck by coarse, adhesive material expelled from the converter, further by being provided with devices for water or evaporation of hot water is strongly cooled so that the adherent, expelled material is removed and shrunk, and that symmetrically designed dust separator cyclones of per se type Aro are arranged above and around the cooled zone at the upper end of the chimney outlet, is closed air a water-cooled lid.

Den rymliga utformningen av de gamin skorstenarnavisserligen till betydlig tjocklek vaxlande, vidhdftande skikt utan att Oppningen harigenom eventuellt blev alltfOr trang, men .det forekom ocksa, att manga ton tunga kakor plotsligt lossnade fran vaggarna och st8rtade ned pa skorstensbottnen, en risk, som blev ytterst aktuell viol, utrensning av skorstensbottnen, vilket naturligtvis icke kunde forsigga helt utan skakningar och ofta gay upphov till svara olyckshandelser. The spacious design of the old chimneys, albeit to a considerable thickness, alternating, adhering layers without the opening thereby becoming too narrow, but it also happened that many tons of heavy cakes suddenly came loose from the rocks and crashed to the chimney bottom, a risk which became extreme current violet, cleaning of the chimney floor, which of course could not proceed completely without shaking and often gay rise to respond to accidents.

Denna risk bortkopplas ocksa helt genom den nya skorstenen: Den kraftiga kylningen A.stadkommer namligen en mycket snabb krympning air de vidhaftande, utstotta delarna, varigenom det A ena sidan bildas sprickor i de vidhaftande delarna och A andra siclan uppstar en inbordes rorelse Indian de Edda intill varandra liggande krokta ytorna, ndmligen den vidhaftande ytan hos det utstotta materialet och den. sldta, rundade skorstensytan, vilket med sakerhet standigt leder till att de vidhdftande delarna lossna och falla ned, innan det vidhaftande materialet Over huvud taget kan vaxa till nagon anmarkningsvard tjocklek. Effekten av det utstotta materialets snabba lossnande fran skorstensvaggarna enligt uppfinningen gOr det nu i sin fur mbjligt att Oven anvanda en skorsten med vasentligt mindre oppning eller tvarseklion, eftersom Oppningen Over huvud taget aldrig kan vdxa igen i anmarkningsvard grad. Ett sadant konstruktionssatt med relativt liten tvarsektion är fordelaktigt fran ekonomisk synpunkt. This risk is also completely disconnected by the new chimney: The strong cooling A. causes a very rapid shrinkage of the adhering, expelling parts, whereby on the one hand cracks are formed in the adhering parts and on the other side a cyclone creates an inboard movement Indian de Edda adjacent curved surfaces, namely the adhesive surface of the ejected material and the. sldta, rounded chimney surface, which with certainty constantly leads to the adhesive parts coming loose and falling down, before the adhesive material can at all grow to any remarkable thickness. The effect of the rapid release of the ejected material from the chimney cracks according to the invention now makes it possible in its own right to use a chimney with a substantially smaller opening or transverse section, since the opening can never grow again to any appreciable degree. Such a construction set with a relatively small cross section is advantageous from an economic point of view.

DA kylvattnet i cyklonerna blir mycket hett, kan (Jetta uppyarmda kylvatten utnyttjas sasum varmebarare, t. ex. sasom matarvatten Mr avloppsvarmepannor. When the cooling water in the cyclones becomes very hot, (Jetta heated cooling water can be used as a heat exchanger, eg as feed water Mr wastewater heating boilers.

Uppfinningen beskrives i det foljande med hanvisning till bilogade ritning. The invention is described in the following with reference to the accompanying drawing.

Pa ritningen visar fig. 1 en vertikalsektion av konverterskorstenen med i sidled apordnade stoftavskiljarcykloner. Fig. 2 dr en seklion efter linjen A—B i fig. 1. In the drawing, Fig. 1 shows a vertical section of the converter chimney with laterally arranged dust separator cyclones. Fig. 2 shows a section along the line A — B in Fig. 1.

Vid utforingsexemplet i fig. 1 och 2 ar upp- 2— — till pa en med rund tvarsektion forsedd del av en vattenkyld konverterskorsten 1, som overst är tillstuten av ett avenledes vattenkylt lock 2, anordnat ett stort antal, t. ex. 12, fOrhallandevis sma, vattenkylda cykloner, 3, till vilka de stoftrika avgaserna Iran konvertern ledas tangentiellt genom slitsar 4. Ph cyklonerna sitta sma skorstenar 5, som upptill avslutas med koniska lock 6. De renade avgaserna stromma genom dessa skorstenars slitsar 7, medan stoftet regnar ned i fallrOr 8 och slutligen uppsamlas i ett eller tva rbr 9. In the exemplary embodiment in Figs. 1 and 2, a large number is arranged on a part of a water-cooled converter chimney 1 provided with a round cross-section, which is supported at the top by a similarly water-cooled lid 2, e.g. 12, Relatively small, water-cooled cyclones, 3, to which the dusty exhaust gases of the Iran converter are led tangentially through slots 4. The ph cyclones sit small chimneys 5, which end at the top with conical lids 6. The purified exhaust gases flow through the slots 7 of these chimneys, while the dust rains down in fallrOr 8 and is finally collected in one or two rbr 9.

Genom de xnanga anordnade staftayskiljarcyklonerna astadkornmes en uppdelning av avgasstrommen i ett stort antal skilda strommar, som medfor dels fardelen, att de stoftpar tikelbromsande ytorna och anslagsytorna hos de gasbestrukna avskiljarna sammanlagt are vasentligt storre, an om anan endast skid-le anvanda sig av en enda cyklon, och dels att krokningsradierna hos de manga sma cyklonerna, i vilka stoftpartiklarna centrifugeras bort, Ni vasentligt rnindre an vid en stor cyklon. Alltsâ Or den centrifugalkraft, med vilken stoftpartiklarna pressas mot vaggarna, aven vasentligt storre an vid motsvarande stora krokningsradier. Dessutom foreligger vid stora cykloner ytterligare en nackdel av strOmningsfysikalisk art, sum betydligt forsamrar uppbromsningen och avskiljningen av stoftpartiklarna och bestar i att gransskiktet hos strOmmen vid vaggarna i stora cykloner mestadels Or turbulent, medan det Yid sma cykloner bildas ett laminart gransskikt, aven om strommen lagre in i cyklonen sjalv är turbulent. Medan stoftpartiklarna vid stora cykloner dOrfOr hela tiden virvlas mot de turbulenta gransskikten, konuna de vid tillrackligt sma cykloner att hejdas i de laminara gransskikten intill vaggen och kunna sjunka i mer eller mindre skruvade banor neded. By means of the narrowly arranged staple separator cyclones, a division of the exhaust stream into a large number of different streams is achieved, which partly means that the dust particle braking surfaces and the abutment surfaces of the gas-coated separators are substantially larger in total, if only a single ski is used. cyclone, and on the one hand that the hooking radii of the many small cyclones, in which the dust particles are centrifuged away, are substantially lower than in a large cyclone. That is, the centrifugal force with which the dust particles are pressed against the cradles is also substantially greater than at correspondingly large hooking radii. In addition, in large cyclones there is another disadvantage of a flow physical nature, which significantly impedes the deceleration and separation of the dust particles and consists in that the spruce layer of the current at the cradles in large cyclones is mostly turbulent, while the small cyclones form a laminar spruce layer. into the cyclone itself is turbulent. While the dust particles in large cyclones dOrfOr constantly swirl towards the turbulent spruce layers, in the case of sufficiently small cyclones they can be stopped in the laminar spruce layers next to the cradle and be able to sink in more or less screwed paths down.

En annan fordel med anvandningen av ett stort antal sma vattenkylda cykloner, som verka pa samma salt, som ett rorknippe i en rOrkylare, Or den goda kylverkan, ,som harigenom utovas pa avgaserna. Denna verkan intrader emellertid forst efter det att avgaserna roterat flera vary i cyklonerna, alltsa fOrst riktigt, da stoftpartiklarna redan centrifugerats bort Tried relati-vt stor rotationshastighet. Kylningen astadkommer da en storre tathet hos avgaserna, som a sin sida dä stromma ut relativt langsamt ur de ovre skorstellama. Den i Overraskande grad minskade hastigheten hos avgaserna, anslagsverkan i den Ovre skorstensdelen och stromningens avbojning i utloppsslitsarna 7 bidraga harvid vidare till att sa gott som inga stoftpartiklar alls kunna tranga ut. Kyleffekten pa avgaserna gynnas emellertid i synnerligen hog grad just genom den flervarviga rotationen i cyklonen, vilket motsvarar en ytterligare Okning av kylytan. Dammed hindras alltsa saval ant gnistregn, ljus frau avgaserna och stoftuttrangning i fria luften. Another advantage of the use of a large number of small water-cooled cyclones, which act on the same salt, as a bundle of tubes in a tube cooler, is the good cooling effect, which is thereby exerted on the exhaust gases. However, this effect does not take effect until after the exhaust gases have rotated several times in the cyclones, ie only correctly, since the dust particles have already been centrifuged away. Tried relatively high rotational speed. The cooling then causes a greater density of the exhaust gases, which in turn then flow out relatively slowly from the upper chimneys. The surprisingly reduced speed of the exhaust gases, the impact effect in the upper chimney part and the deflection of the flow in the outlet slots 7 further contribute to virtually no dust particles being able to penetrate at all. However, the cooling effect on the exhaust gases is benefited to a particularly high degree precisely by the multi-turn rotation in the cyclone, which corresponds to a further increase in the cooling surface. This prevents the presence of sparks, light from the exhaust gases and the emission of dust in the open air.

Da arbetsforloppet i konverterskorstenen icke am likformigt utan utspelas steg- och stotvis beroende pa om konvertern just blaser, tonunes eller beskickas, innebar just den goda kylanordningen for den beskrivna stoftavskiljaranordningen en speeiell .fordel, da barigenom undvikes, att skorstensplatarna vid biasningens borjan upphettas alltfOr pl8tsligt och darigenom utsattas for stoma varmespanningar. Likash klara de manga sma. cyklonerna battre den stotrvisa belastningen och stoftpiiverkan an en enda eller nagra fa, men vasentligt storre cykloner. Genom cyklonernas anordning i skorstenens langdriktning kan man ocksa. .gora gasinloppsslitsarna 4 erforderligt langa och darmed ge dem den erforderliga totala genomloppsarean pa ett enkelt och lampligt satt. Since the work process in the converter chimney is not uniform but takes place step by step depending on whether the converter is blown, tuned or loaded, the good cooling device for the described dust separator device has a special advantage, as it avoids the chimney plates being heated at the beginning of the biasing. and thereby exposed to dull thermal stresses. Likash klara de manga sma. the cyclones improve the shock load and dust effect than a single or a few, but significantly larger cyclones. By the arrangement of the cyclones in the longitudinal direction of the chimney, one can also. make the gas inlet slots 4 sufficiently long and thus give them the required total passage area in a simple and convenient manner.

Claims

1. Patent claim: The converter chimney with separator devices and with a blow-in hood mounted at the bottom can be cleaned of the chimney bottom or collecting funnel, characterized by the fact that the converter chimney (1) connected to the blow-in hood has smooth, round inner rocks at least in the zone baftbart, frau convertem ejard material, is provided with devices for greatly cooling by water or evaporation of the water surface so that the adherent, ejection material is milled away and caused to shrink, and that symmetrically designed dust separator cyclones (3) of in and of themselves edge strokes Are arranged above and around the cooled zone at the upper edge of the chimney pipe, the upper outlet opening of which is closed by a water-cooled lid (2). Request publications: