Efoctsä^ ÍÖÖÖ1I The ïîîvîîïííton refers !.o an externaliy mixing muhl-componcm nozzle for spraying fluids with the aid of an atomizing gtts, especially steatn or hot gas, which is hot 1« relation to the ffoids wfeioh are to fee sprayed. itffiÖÍI In many pt«,\ess engmeemg pUnts, through vfowh dows « primary fiaid, .especially fiae ges. tlm aim is io rots asecondary fluid, especially water, as homoganeously as possible into the primary -fiúid sad fiequentfy also to evaporate it over the »hortest distaoc-e. -For this purpose, two-cumponent nozzles are frequently used, in these twO’eomponent nozzles, the fond. is atomized by means of a gaseous or vaporous auxiliary medium.. These iwo-eousponent .nozzles.arc dístíngfosfeetl fey a paíticnfetriy fine droplet spectrum and also by.a-very good partial toad behavior. In many plants, especially in -power plants and waste incineration .plants, steam is made, available, It can than be expedient, for cost reason», to use the steam as auxiliary atomizing medium because the provision of a corresponding «mount of compressed air would'be associated, with high Investment- and operating costs. I9Ö03I -For «tombing with two-eemponeoi nozzles, two basic types of nozzle are available, .specifically internally mixing nozzles on the one hand and, on the other hand, externally mixing nozzles. Examples of internally mixing atsd externally mixing nozzles are described inMasse Jule and Beádig, industrial Sprays and Atomization, Springer Publishing House, 2Ö02, on page 24, .for example, (9994( Ä spray drying nozzle, its which ars atomizing gas is distributed to two -concentric annular slots,, is known from VS printed patent specification 3,770,207. Ass annular slot for the solution to be dried is arranged, between the. two annular slots for lise 'atomizing gas. The Innermost annular slot for the atomizing gas is -formed fey inserting a cortical piece Into she - contrai discharge opening. |8®0£| Described in Garman utasxantiued-specification DE 194 29 404 A.l is a two-component nozzle for atomizing pom-like fluids, or fluids eomohthtg solids, for example slurry, in which the -fluid to be atomized is fed. through a central, cylistdricai passage- and at foe end of fois passage, fey means of Individual nozzles arranged in a -riftg'-like manner, tits atomizing gas is blown into foe field to be atomized. (9999( Described in German printed paient spceiEeation DE SS 79 24 is a drying ooze!« In which the fiúid to fee atomized is-atoadzed. between, an. Inner astd an outer conical Sew consisting of gaseous auxiliary atomizing' medium. (9997( Further externally mixing nndlhcomposant nozzle» are -disclosed in docusncots BE 0 i 90 688 .A3 and DE 1 i) '20(15 002 392 A1. (9999( With the invention, an csterually mixing nmifocoosponcnt nozzle few spraying ikfefo; is to fee improved. (90091 According to the ftrventitm, for ibis purpose provision is made for an externally mixing muht» 1 v<n po , I no' V tor nr s u Ci ο ,>ι ι r id ' <i s u t 'v v ' - ίο» s sta· ' »< off s fo * io -comparison to the Studs to fee sprayed, Which nozzle has a -housing, whereb the housing has a discharge opening for the atomizing gas, a first annular slot, encompassing the discharge opening, for fluid So fee »prayed, and s second annular slot, encompassing the first annular slot, for the atomizing gas, and also a. distribution piece, wherein the distribution piece foes <4 less; one flow passage lor ilnid to fee sprayed front a connecting line to the-first, annular passage, and at bast one flew passage iron? an «tombing gtts connecting (inc to the discharge opening for atomizing gas. (öölöj Th« pmisiö« »f snob. a distribution piece- btside the nozzle housing ensures that fluid to W sprayed and atomixmp gns are conducted to the tirai; annular slot, or to the discharge opening, and to the second, annular slot over a short diÄce. jttsi; by the provision of the dlsiribtnietr piece and th«: short distance afrribotable thereto, an only low heat transfer trots: fiant m b« sprayed to the atomizing gas is achieved. As a resoh, it can ho prevented, that the hot utontizing gas already cools down· and possibly evett condenses before iesving the housing. Consequently, a ntnch better atomizing effect is achieved. The dwtrlbutmn ptece is preferably produced fern. solid material anti the flow passages are provided inside the solid material. ltd) 1 11 in a deveksptneni of the in vent lot», the hotssing lias an annular passage for atomizing gas,, which at least io sections encompasses the distribution piece, 100121 in this way, the atomizing gas-.can he conducted fern: the annular passage over a short disfencc into the second annular slot and, since the flow passage, ofthe-disdibudo» piece lor. fee ntemixmg gas: mivartisgeousiy originates front the annular passage, the atomizing gas can diso be directed to the discharge opening over a short distance. With the present invention, a new-type of nozzle concept is proposed, in which the atomizing gits, inside a »«tall distributor which is integrated into the nozzle bousing, is distributed to a centrai aiotntzing gas flow through the discharge opening and .also -to xt<> on d » st n ! o,> ' t n, s do Mo» \*'o< atomized is also apportioned to an annular slot winch is arranged between the ceuitai flow and the outer annular slot Row of the atomizing gas, This: distributor, or the flow passages in the distributor,.ate dimensioned so that a w pnswd bmh h\ ihud to be .tmmweo and b the atotni/tng pa. at tehtttteiy mph m tier h-udts ant tune tetnains bn ätc.tt untwfer tn rdfetfer tin suriares xbuh toad u? the heat tsmwk-t between atommmg gas and fluid: are of very snmll dimensions and she distances between tit«••individual flow passages, which conduct the. cold, flnltf arid the hot atomizing gas, respectively, are dimensioned as large as possible. Therefore, tor construction re luted reasons the mterusl heat darüber from the hot atomizing gas, especially steasn, in tint tiuld < , !O tU'.d t >0' Stil' »'5 <d to Ό ub i "O', (· itt' t vint ' a η ft« „nM t advantageous because with this, io She interests of good atomization, She surface tension and the viscosity of the fluid to be atomized cats: be reduced: (Odldi hr the esse rtf she invention, however, it is not exclusively a question of atomization quality, as can be established, ott: a virgin nozzle in the: bshorstery under ideal boundary conditions^ Rafem, the tact tant tue atomization qualify in tsuinstriui practice occasionally suffers fron? She forming of deposits msuk the nozrkt. m at the nozzle month is to be taken Into consideration, This especially applies when indertnai water «s used as fluid to be -atomized. Even if suspended matier is largely eliminated by means of tiltration, in man«. cases ,t formation of deposits in the nozzle or at the nozzle mouth as a result of the settling of dissolved mhds o m be observed. This applies above all to those eases in winch & hnl atomizing gas is used, as a result of winch heating of the w.dh which am in eontem nith the imlmmal water <aa then occur A limitation of the heat transfer inside the nozzle-according to the invention can consequently also solve the problem of deposits forming: in the nozzle. iOifidf In a development of the invention, a thermal insulation is provided, at least in sections:, between the flow passage for fluid kt be atomized in the distribution niece and said distribution piece. pS01n| bt th s wm a h, n tut wie, \>w,e< ' Ί-' cold tiun to be uont ud acd ;h. den «hun."·- pa\, wh.h s-heated by fite hot .atomizing. gas, can be reduced. ifi a development of the invention, the how passage for fluid to he atomized in the distribution piece is formsd, at least: fo sections, by means of-a tube which is inserted into the distribution, piece, (9917( in this way, a heat transfer heiweett the flew passage sod the disn-ibun'on piece can already be significantly reduced. An air gap Is advantageously provided, at least in sections, between the tube and the distribution piece. Ast air-gap insulation leads io a further, significant reduction of bent transfer front tire cold *1 no m Pc \ mwcd to Ute ,t, u foi.tiou o e, 19919( it; a development of the invention, the connect tog line tot fluid to fee atomized Is of doable-walled design, at least in the connecting region to the distribution piece. |ρθί<η h. itij » ',>as, a good thermal nu-ulafo'n no emmpk h» means of an ar gap tan be ach-cvcd between tire connecting line and the housing of the nozzle. 19929( In a development of the iavsntion. a thermal insulation layer is provided between the first annular slot anti the housing and also between the Erst annular slot and foe second annular slot. )8921) In pi. w<w., a tea oan-k-t \’wcco dx- co d duo, and ·{' fo,! mounztog css eon eddsooualp i\ minimized m the atmnht slot tigmu up n< the mulct of foe Enid to be atntni/ed tHuu she nozzle, tins of considérante ndvamugi in the ease of the csR-tnath nnsing two-vvmponent nozzle aeeotding to foi IneeoEon (9922) in a development of the invention, the discharge opening for the atomising gás has the form of à third annular slot. )9923( 'te < n>o .rfo <kn ds < w„ ) w ab ?,< e re,, betonon too η n tin s ot flows d v mt t <. "n< ng < iv «vöd ic'iuvdkt o,, ar»·* Me ufo an '< * u slot, < n fo to and M vnjA '\tb' insertion of a conical piece into the discharge opening. )9924( In a development of the invention, foe boundary of the Erst annular slot, as seen in foe flow dlrcelioa. Is arranged in front of an outer boundary of the second annular slot. )9929( In tub way. the fluid to he atomized disehatges from the Erst atmulat slot and comes into contact with 'the atomizing gas front the second annular slot just before the atoipizihg, gas has left foe nozzle month at she end ot f\ second annukit s.ot 1 he nmm,-ng gm< neu the »„wnd ann,;ka \hn .oos^quemh, ,wan-S rau.m t'm>' side so Shat an accélérai ton of the Emd, which is to be atomized, by means of the flanking gas flows is carried out .lost before leaving the nozzle mouth, fo fois way, a finer atomization of the fluid to be sprayed can be achieved. )8926( in a development of the Inveptlon, foe boundary of the first anoalar slot is arranged by one in ten times the width df the first annular slot in Póni of foe outer boundary OS'the second annular slot, as seen in the flow direction, (992?( h·.deveínptnent ol the nwemmo, a; k'.fo mse distribution pseee is formed from a materud, espeu.s.h fouh~,foo\ (ugh-grade she·, u -fo a voeflkteut of thermal ctmductsvny which is significantly reduced, ewpeumh bs !he kiCto; ot 9. eotnpated w uh bras? OOM) Ί, p w sion ol ? ruu,, w - kw u\; "p vos t s u tc she ,9 » b tmo ue<.; et , w\ w esscnuafo, wwuwc ,·. boat transfet between foe thud m be sprayed and foe hot atomizing gas. ,9928) 1" î o. selop ne 9 oi the i"sc*'t, o v \<uo n t'\ d ’?'♦ s upstnvm ni ills' λμIntec 'pu a t. o , n. flow parage for the bot nivovfiog ga» »r fumed m the housing so that if first of all tapers and alter passing a ronsitn'E"!'· widens Again up to foe discharge oocnnsg, as seen in the flow direction. 003(0 1 <? -, s' w U k! ! < ο u or ; oe ' t otwe m nt ,bw uj A kp î parOeolar, ihss osscharge tsozzle eats he designed es « Láva] nozzle so fitst the hot atomizing gas then discharges Loot the discharge opening at supersonic velocity. vo*l «0, , e>\ «„ 's? U V tl \ «< ion tt( irthttei 'U'idît sbfi‘ a> He<; description of preferred ernbodimoms of the usvention in conjunction with the drawings. in the drawings:
Fig, 1 shows an externally mi sing multi-component nozzle according to the invention in a sectional view according to a first preferred embodiment.
Fig. 2 shows an enlarged del ai I of the multi-component nozzle of Fig;. 1,
Fig. 3 shows a multf-component nozzle according so the invention according to a second prêter; ed ertthodimeng and
Fig. 4 shows a detail of a muld-comportem nozzle aecotdmg to the invenlion according so a third embodiment.. 16032] The sectional view of Fig. 1. shows a stoiti-eotnoeuent nozzle 1 according to thé Invention. In She cast: of the multi-component nozzle 1 according to the mvemto«, the object of largely overcoming premature ontha ps k<"0\ ,t to? tOPiag gas a <- wait -n beat huwfer io Ilk :'md m u>mt»ed <«nt ot prevr-M ng deposits iofiolng in the nozzle as a tcsult of tomperature-dependmit depositing of components of the fluids which asv dissolved, at low tetopenduns, is sitide ved io the following w;;y. The steam flow It) which is fed vis the steam Seed hoe to the nmlfi-eoitrp»t?eet ouzzle I is split Into two panini flows io a new-type distfibotloo piece I h of Small dimensions which can therefore he sstiegrated into the nozzle I, An outer partial How 30 and a· central partial Slow 20 of steam or hot atomizing gas are produced. Fite nuler pártád flow 3(1 it; blown oui via ao outer annular siót 29, Whet'etts the central paeritfi How 28 Is blown out via a eentfid nozzle 62 which ends to a discharge opening 60. Art annular slot nozzle 20 for discharging fite fluid to he sprayed, especially water which \t'k «'<)tw s a <am>'d <?>«z<n \ettoal uo' . ο Ή; tm th< dt to* zee o \ u'$ (to and a ; eu at itmmia.r slot nozzle 31, The sppfoseh of atotoizetien iff the fluid via a central How and to; outer anntfiar slot flew of the auxiliary aiotnlzlng medium araké the atomization easier, Esseotlal tor the hrvemion, Itowever, is the design of the distribution piece 10 for distributing fluid to he sprayed and hot atomizing gas to the iadividaai discharge openings of the nozzle 1, 16033] A characteristic feature of the nozzle I is that the Hold to be atomized ts not discharged via a central nozzle hut via an atwtular slot. Ttis attstfiar slot can. be of relatively large dimensions because 1st this ease a high discharge velocity of the fluid is not necessary. The atomization Is carried oui according to the mvent ton by the fiaid film being imrodtsced between t wo high-velocity atomizing gas Hows, As a result of the shea;· stress elj'eet of these feigh-vclopdy Hows, the tinid .film is extracted fiom the annular slot to form a thin fiúid .lamella which dtsinfegrates hoe sotai 1 droplela. Therefore, the risk of material erosipn on the annular slot wal ls of the fluid nozzle, spec ifically nt the uomdar slot 21, is also greatly reduced and the long-term stability of 0<? .$ tfiow otasuu ts "i<ul ;ez??eo?s m ?m\< nt a proh ct t; 0's e-p<w toief <- t'".' however, also has a very good partial load behavior, completely is contras; So singlo-vonlposcst 'nozzles , ct,', t. ,o p o t i '' t -.o tto; - n tl fie tl d.u 10034] The central nozzle P2 tor hot atottnzittg gas having the discharge opening 30 Is designed according. ;? ‘ , , v;v 'tot j t?.' to , t t 5 ? low tOo-tltot; 1 lot '\ tmo\ ή <un s s' d;v s <! w; ; t snpetezltlcaf pressor« ratio, this, configuration opacities -as s Laval nozzle ;mb the steam Ösen discharges at supersonic vekmhy fern the central nozzle §2 at the discharge opening 6(5, It Is also Important, however, 'feet the nozzle I does not leave an end face which is washed by industriai watet. This is achieved by the very narrowly formed boundaries of the atutnlst slot 21. Therefore, the problem of stalactite-like deposits, as is to be nmmrered hr end faces of nozzles according te the prior art, does not occur either hr this esse, |W35| Essential, featunes of the nozzle t according to the invention coneemthe thermal decoupling of the hot atomizing gas, especially steam, from the eoidI water at the nozzle connection and inside the ttozzle, For this purpose, the feed line 4 for the wafer 3 Is of doable-walled design, föfefef In addition, tbrongh-hoies, via which the water 5· Is fed to the annular slot 21 ttod the steam is ted to the centrât nozzle 62 having the discharge: opening 60 or to the outer annular slot 29, ate -arranged itt the distribution piece Î.8 with the greatest possible distance apa«·, inserted into the holes 19 for the feed of the water to the discharge part of the nozzle 1 are inner tubes 38 which on. tite eater side, that is io say at fee« start and end. are relieved so that a wall contact, which: centers the inner tubes 38' in the hole 12 in the distribution piece 18, exists only in the narrow sections. As a -result of this, an air-lifted eavlty, which serves as a thermal, insulation, is created between the water-conducting inner tube 38 and the festrlbution piece 18, In addition, the outer surface of the central nozzle 62 having; the discharge opening öd and the inner surface of tite »mutter slot nozzle 20 having the annular slot 21. are also lined wife «thermally Insulating layer 35,36 so that the fetid to be atomized, practically ever its emite passage through: the nozzle 1 to the direct proximity of the nozzle month, is equipped with. & thermal insulation agtthtsf tite nozzle housing and especially against the distribution piece 18. ataf therefore also against the flow nf the hot atomizing gas, The effect achieved in fen way is feat the fluid is only slightly heated, or that the hot atomizing gas, especially the hoi steam, sailers only small enthalpy losses as a result of cooling, Í0Ö32J Naferaliy, the possibility exists of also applying a thermal inautetibn on the side of the nozzle which is acted upon by steam. This, however, would usually be disproportionately costly because the: sdtfhce which is In contact with the steam is significantly larger than is the ease on the water side, (00381 A further interesting possibility is to use a material with low thermal conductivity, at leas; for the distribution piece 18, which maierhsbon the other hand, is suitable for the predetermined operating tetnpetature of 300*0, fee example. The changeover: from brass to a high-alloy high-grade steel already leads io a redoes has of fee thermal conductivity by the factor of 8, |003!ti fey io'.;, }s s d'tui,'’v vue»! of 1 tz on . w nor.k ' raw hr nozzle 1 ;s intended for being aosmged Inside a duct 2 which conducts a pwnary fluid, for example fine gas. into which a fluid to be atomized Is to be injected. The duct 3 ;s only schematically represented by one of Its boundaries. The nozzle I is theteforc located inside the flow of the primary fluid in the duct 3. feOdOj The fluid 5 to ho atomized is fed via a connecting line fe via a central connection I ? of the nozzle housing 2, to the distribution piece 18 of the nozzle 1, Vta at least one hole 19 in tbc distribution piece IS, Into which an inner tube 38 is inserted, tite fluid 5 finds its way· into an annular chamber of the .annular slot nozzles 20 which inwardly Is delimited by a centrai nozzle piece 27 and outwardly hy au intermediate cap 34 From this annulus, the fedd finds its way over tho shortest distance to the fluid onfe-t at the annular slot 21. (0841( The atootizfeg gas. «.g. hot steam 18, is first of ah fed to an annulus 23 in the nozzle housing 2 via ' ψ t' -tu h h \ t'unkstt't i‘\ i , ms οι <0 , \ d,t - - rom th run 1, s 21 r k a < v w s.e , < \ finds its way into a centrai chamber 26 in the distribution piece 58 via at least one milled out portion 24 and via at least one hole 25 in fee distebsttioa piece 18, The hole: 25 is of such dimensions ihat a defined apportioning of fee ltot steam 10- to two partial· flows is carried oat, specifically once w the hole 25 to the discharge opening 58 of the central nozzle 62 and once via the annulus nf the antitdar slot nozzle 31 io the annular slot 29 at the nozzle month, (0842( in the depicted embodiment nf the nozzle 1, the central nozzle piece 27 is screwed into the distribution piece 18 and forms the central nozzle 62 for the coated steam, jot 28, A Sow nafh of die central nozzle 82 then, extends In the central chamber 26 in the distribution piece 18 first of all convergently in a.-first conically tapering section, A cylindrical section -adjoins this first eotheally tapering section, forming a constriction, Adjoining this, a conically widening section to the discharge opening 68 follows. As is customary m t evei no, des. She r.ntio 't>v' t o' ïtetJoie <.\t«m>L fast ol idi ronsmpmtb ,n.d tree d.wtgetuh,, and m? cross-ssotional dimensions ofthe conbai nozzle 62 are also responsible Ihr the distribution of the steam flow 18 to the centrai, nozzle 62 and to tire omet annular gap nozzle 31, The timer memo flow, also referred to as annular slot steam Slow 38, is fed via the milled ont portion 24 first of'all to the annulus of She aunolar slot nozzle 31 and from bore finds its way into the onter stinulsr slot 29. The steam therefore discharges noth as a central steam jet 28 from the central nozzle 62 and iront the outer annular slot 29, (0843( The outer annular slot 29 is formed between an onter cap 49 and the mfetmediate cap 34, Tig steam, at high velocity right np to high supersonic velocities, discharges bom the onter annular slot 29 and from the discharge opening 68, as is illustrated by aeows 32, 33 bt big, 2,. As n. result of the interaction between fee ring-like fluid jet, which· discharges from Pie first annular slot 21., and the flanking steam jets according to fee arrows 32 and 33, a droplet spray jet with the boundary 22 is created, as is shown by the dashed lines iu Fig. i. (8844( in many cases, the previously described configuration should already effect an adequate thermal decoupling of hot steam 1,8, as atomizing gas, and fee cold fluid 5 io he atomized. In order to improve: such a thermal decoupling anti to reduce a heat transfer between fluid 5 to be atomized and the hot steam 18, fee connecting line 4 for tite fluid 5 is of double-availed. design in which provision is made for an inner tube 37 up te fee connection to fee distribution piece 18, The emmeeting line 4 is therefore of double-oval fed design and provided with a thermally insulating air gap 44, Alternatively, fee connecting line can. also be constructed; with a. graphite sleeve In order io achieve a thermal insulation, (8848( in addition, the flow passage in the at least erne hole 19 in the distribution piece 18 for the feed of water te the annulus of the annular slot nozzle 28 is also of dottbie-tvitlied design wife- the inner tube 38, wiicrein, as was explained, an air gap fies between the· inner tube 38 and the hole 1,9 in the distribtjtion piece 18. (8846( 3'ho water-'cnndnciing annulus of the annular «let nozzle 28 is thermally insulated by layetz '5 '6 of suitable material towards tite central nozzle piece 27 as well as towards the intermediate cap 34. These insulating layers 35, 86 for example can consist of mend, with poor thermal ctmdnefiviiy or ifom a ceramic material (8847( In order to further reduce the heat transfer between fifed 5 and hot steam 16, a disk 48 produced Stete a. thermally insulating material is provided on a bottent fee«· 39 of the distribution piece 18 to which the eounestmg lisse 4 for fiaid 3 À afíaehed. As a result, a heat: imtsfor frntn ils« fiúid 5 in the .cmmectiPg lise 4- to the disbdhafion piece '18 cun he significantly reduced. The disk 40 is provided with, tljrouglidtoies in other io direct fluid 6 into the a; leas;' eret hole 19 or itste the teuer tube 38 hr the dlslrlhution piece 18. (9948( To which extent the previously described measures »re adopted depends upon fite operating eordn'.eo; fo the oozzk Abend' by the pren own of foe diet- fomion pieie lb us she houa up 2 of Use noMe s, lit many eases an adequate thermal decoupling of het sfoatn 19 and fluid 5 Its be atomized Is already achieved so thaï as a rule streit costly additional insulation nteasures cast be dispensed with.. (9999) The nozzle .housing 2 is nf naslti-piece design and Isas a -first, approximately sap-shaped component 94: having the connecting lino 11 for hot steam and having the canneetfon IT lor the .connecting line 4 for fluid 5, The distribution pseee 18 is Inserted, info the cap-shaped: componem 94 and is seresved onto the connecting line 4, which is also hs&ertsd into the component 64, and is supported tu foe radial direct lost on foe saner wall of the etgwshaped comptaient 94 vis ribs 99, l-foovisfost is made between foe ribs 69 for the milled-out portions 34 via which bet steaat 19 finds Its way Into the slow· passage, formed by the hole 25, in foe distribution piece 18 and io the outer artnular slot 3 S, (9099): The outer cap 49 Is screwed onto die eup-shaped component. 94, Arranged inside the outer cap 49 :1s the l.atersnediale cap 34 which is screwed onto foe distribution piece 18. The outer aunniar slot nozzle 31 for hoi atomizing gas is therefore formád between the outer cap 49 and the' .intermediate cap 34 and ends at the nozzle month on the outer annular slot 39, (9991( Inside the intermediate sap 34, the central.nozzle piece 2? is screwed into -the distribution piece 1 §,· The annular slot nozzle 29 for fond fo be atomized is forrnád; between the central nozzle piece 27 -end foe intersnediate cap 34. and ends at foe -nuzzle month on the asmuittr slot 21, As was .-previously described, an outer side of the central nozzle piece 27, which delimits the annular slot nuzzle 28 on one side, is fined, at least is sections, with an Insulating layer 35, Only directly .upstream of the annular slot 27 is there so longer provision for an insulating layer 35 in coder to he ahis to design the annsiar sioi: 21 narrow. (9992) An. inner side of the intermediate cap .34, which outwardly delimits the annular slot nozzle 20, is t si jo d so w loM'^aurhut u 1 hi s di -. b u wire u s’ hi murtso I there m fon„i j provision for an insulating layer 36. (9933( The nozzle 1 according to the invention is obviously of a very·· cosnpaet eonstraetion. and particularly efforts a distribution of the hoi steam 10 to the central nozzle 92 arid io the outer annular slot nozzle 31 Inside the housing 2 of the nozzle I over a short distance. The flow passage for hot steam in the distribution piece i S, fonnedfoy the hole 23, via which hot stoats Studs its way to the central nozzle 92, is artonged at at; angle to the flow passage for Said 5 to be atomized - also provided in the distribution piece 1.8-- which is formed by tin; hole 19 and the inner tube 38. The flow passage for hut steam and the flow-' passage for Ilnid are therefore arranged husidé the distribution piece 18 in a cross wise manner. 1a the depicted enfooddnent, an angle of about 45*' lies between the center longitudinal axes of the flow passage for hot: steam no a ot foe flow passage for Enid. (9994) The distribution piece 18 is produced from high-ail by high-grade steel which has lew thermaf conductivity. Compared with conventional brass nozzles, a heat transfor front the hot steam 78 to the cold field S. which Is reduced by a factor <4'about 8, is already achieved as a result. frXifrfrl The inner lube 38, which is inserted into the hole 19 of the distribution piece 18, forms a Oow passage for the fhtld 5 through the cbstrihutioa piece 18. '1 he inner tube 38 is constructed as a turned pan and b.vi\ .tourst the »met w Hi <4 the ht. k 'u o.tfr n the «W", oh, Y rtotsj.h. the scot,aw <A, Y, nhtch aw shown in black in fig I, an Insuiating ait gap 72 lies between the inner tube 38 and tire distribution piece 18. 100561 big. :>. shows the nozzle month having the discharge opening 66 of the nozzle 1 in an enlarged wev , s tr |\ ww' ot}, A ,ti >i t u < opt n ng of' of il c u>0 irioiái s’\ î w to annular slot nozzle 20, arid the annular slot 29 winch defines tire ontkd of the annular slot nozzle 3 i, are located exactly at the same height. as seen transversely to the flow ditec· tots. Consequently, mixing of the hot steam I K μη < I r idar Hot t'O"h '1 md ti 'te k ic n no k o * w t ' \ t 5, kt ov ftov, ' 1 >, te t>' atomized from the annular slot ätozzie 20 is earned ont jest outside the nozzle 1, (ÔÔS71 The view off ig. 5 shows g. fünfter mufri-compítnem nozzle 8Ô according to lire invention aecitrdtog to a sseottd -preferred embodiment. The muíii-somponent nozzle 86 is to a great extent -constructed: identically to the multkeomponent nozzle 1 itt fig. 1 en-that only the ieatores which differ from the nozzle· t in· Fig, i ttre explained, [frSSffr As is to he seen in Fig,. '3, & central body 4 1,< which extends -through: a central nozzle .82 for hot steam, is screwed into the distribution piece 18, The central body 41 is therefore .completely exposed to eirowfiow by hot steam from the centrai chamber 2d in the distribution piece 18. In t he region of the discharge opening 06, the ceolrai body is designed hi the forts of a widening cone 42 so that the discharge opening 66 is: offing-like design and an toner amwktr .slot 43 is -formed for tine discharge of the proportion of hot steam 16 which is tod via the hole 25, flic ring-like How of fluid 5 io be atomized is therefore enclosed between two also deg-tike bot stein« flows. 10059) By ptoviding tbc cone 42, the centrai steam also discharges via the annular slot 43. The central cone 42 in this ease, however, is only exposed to etrcmnHow by hot steam which is free of solids as far as· possible so that no relevant risk of deposits forming on the cone 42 exists. As a result of she cone 42, She steam coosompthsp of the nozzle 80 can be reduced a toile more compared wish she nozzle I without this having a negative effect opoo the atomtzatloo quality. Also, to the ease of the nozzle 86 having the central cone 42, the central nozzle 82 cart be constructed as a I .aval nozzle, this, however, is not the ease itt the illustration of big. 3( to order to fort» the central nozzle 82 as a Laval nozzle, the How cross section of toe aonolar slot between: the central body 41 and the discharge sectum of the central nozzle 82 must have a divergent progression towards the -nozzle mouth.
[Ö060Í The Vic«? of big. 4 shows section-wise a multi-component nozzle §0 according, to the invention-according to a third preferred embodiment. The nozzle 90 is funned to a great extent idsmtiealiy to the nozzle 1 m big. 1 so that orsly the restores-which differ frets the nozzle 1 are described, !0ih> I ; 1 be «0/. k- 96 '» w os entet cap i52 o tuch is extended compared with the outer cap 49 of the nozzle 3 \t> a msük, the drwltarge ('getting -'to >d tin cemml nozzle A and tin annuka slto 2t el On annulas slot nozzle 20 for froid to be atomizesi are set hack in relation to the nozzle mouth. The nozzle mouth is formed in this ease by the dcdyosfresito-'disposed end of the outer cap 92, in the ease of the nozzle 96, contact do q fr .IîCk'ok« « \ \ t o iMsn tnsv^t k πίκ ’K''»(I’a« < A' ntuli k and She hot gas Hows from the discharge opening 60 and from the annular slot 29. Already created Inside the