DE1451465A1 - Burner device for industrial furnaces - Google Patents

Description

The invention relates to a burner device for industrial furnaces, in particular for deep furnaces and heating Warming steel eyes, with two concentric see below a fuel supply channel arranged with air chambers Air outlet openings conientrleoh around the fuel outlet opening in a distribution plate that forms the burner housing against the oven absohlieat, especially from the youngest Zelt developed advantages in connection with a high-consistency control of a furnace for heating steel " binoken with the help of a number of burners on economy · » A higher way should be done by using a burner device with a BinseIbrenner Oebrauoh

Zn the USA patent application 189,820 of 24. * .. 1961, which relates to a method for operating soot furnaces becomes an improved heating method for such Furnace described with the help of high-voltage burners. This procedure consists essentially of lightening a furnace with oil and adding the

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required combustion air with a supply speed of at least Si is / seo. wherein Brsnnervoxpiehtuhgen be benutat consisting of a plurality of burning or the effect equivalent to a plurality of burners.

In order to show the circumstances, it is assumed that three individual burners are available to heat one furnace. During the Aufheisperiode "ie during the erforderliehen for heating a group consisting of Stahlblöoken feed the furnace period of time all the burners work with a fixed maximum heating output bin at the time, where the Blooktemperatur check that value approaches _β in d @ n, the blocks are to be heated, and aswar as a pretreatment for a rolling, forging or other kind of Welter belt us for the production of a particular desired product «When the temperature of the blocks in the furnace chamber approaches the desired temperature drop, one of the burners is throttled or switched off, would be =; * the other two burners can be operated normally while supplying two-thirds of the maximum combustion air supply until the blOokes have the desired temperature. Then the two burners be throttled or turned off and the third burner put back into operation, and swar for a period ₃ in the hWakm aarohaävmt istrdoß, © isperaturen "" scarce essentially gleichjoäßige edits. Inside the whole BlocklcSrpere to .erhalten "Before liohung of gasshildsrten earlier VorsaMageis * flame ar <® & tisoh not possible, a ausrelelieiide kinstlsshe energy of the fuel and the hot VerbrfmmsngeprMukfc® during Durohwärmperiode a gaal) efou9s? t @ n furnace au received.

In a known burner (USA-Patentaoto? Ift 2,385,153), several air supply ducts are attached around a central fuel of fsnföhs? «Duct« Die Luftsufüfc? » Channels are located in a longitudinally displaced central part, so that the combustion air flowing in through an air supply channel from the side of the burner housing can flow in either essentially parallel or essentially at an angle to the fuel lh the flame in order to either create an oxy d 909822/0285 / "._ _ _ ''

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A dying or reducing flame can be achieved. In the Burner arrangement according to the invention, on the other hand, should the "fuel" air * mixture ratio always be constant and always have a reciieieende or at least non-oxidizing effect.

Another known burner (US Patent 1,588,792) is expressly intended for a burner of low pressure gas and already deviates from the subject matter of the invention in this respect; Furthermore, there are not several air chambers provided here ₃ but only one centrally arranged air nozzle with several ifUftaustrlttsöffnunsen * directed radially or obliquely forwards so that the combustion air supplied through this air nozzle can mix with the gaseous fuel fed into a chamber surrounding the air nozzle »

In a further known burner device (Deuteehe Auslegesohrift 1.007.931), two chambers serving for gas supply are arranged coneentrically around an observation tube. A switchable valve flap is provided on the upper side of a vertical partition in the Gasssuf clock, in order to supply either both or only one of the fuel chambers with fuel. In addition, a separate air supply duct is provided to introduce the required combustion air into the fuel flow from the outside. Although it should with this burner device; also be possible _} to swap the supply of the combustion air and the gaseous fuel, you can then have difficulties in guiding the flames; result.

The invention reads the object to avoid the disadvantages of the known Iirennervorrichtuneen and a To create Klnzelbronnervorrichtunn, which also during the Soaking period εο can be operated, since the mun reach KleloUmä & iger temperatures within the furnace chamber required high kinetic energy available lot, lodali

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the steel blocks receive an essentially uniform temperature over their interior. The burner vorricltunä so * & thus also during the üurchwärraperlode with high air supply ^. quickly iijke know to operate it, and "was under maintenance he attitude of the v / es hen ti ic constant burning" ätoff- Luftverhältniases, v / le & u is also used during the Aufhaisperiode "to this Much se the Eunderverlust a Reduce minimum. A further aim of the invention is the creation of such a single burner device with a single pipe effort for the supply of fuel and combustion air that is reduced to 1 slightly wet Type of construction required

The invention is identified by means of devices for the constant maintenance of the fuel-air "disparity" for the purpose of changing the temperature of the fuel supply as well as additional control devices for the optional adjustment of the air chambers of the burner with combustion air in order to at least maintain a high level of combustion air -a ßo m / sec, questioning expulsion of the air through the associated air outlet openings in the distribution plate. Another feature of the invention is that the 8 © total cross-sectional area of the air outlet openings of a chamber is open as a double opening. w. like that of the air outlet openings of the wide Kawnnier 1. The air flow device furthermore has a common air flow duct to ύ & η Kfemmom, with which the signals for maintaining the fuel-air flow ratio are connected, and optionally a known flap valve, 4m Close one of the two Chambers against the air,

Hit the invention is not just dl «. Task solved, "In constant" fuel * air-fuel ratio in dependence from see changing aaezuatrömvelumina upright to receive * but at the same time care is taken to ensure that the

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Air passes through the air outlet openings in the distribution plate at a minimum. By -that at reduced Gaazustrora and thus at reduced Luftzustrlnii chambers the other of the two air one way or is shut off, the pressure drop can in the air supply is not over the permissible?! A & beyond üiwachsan _Λ and & n 1st ^ evfährlölafcet, 3a "i the required air flow rate under all company belts is adhered to.

Further details and advantages ate Tesenstands * of the invention result from the following ^ esclireibun. $ Of dsr in drawing .lar ^ stallten Ati3führun £ sbei3pi * sl3. "U In."! Eichnun. '

aXno invention; 3 ^ i »m'l ^ e Brenaervorrlchtun '? ndt a control device for the Peuerun ^ a ^ ^ lock low of ans hzx-i. of another Industrio ofons j

_r ^. 2 in jrü5ar * jm scale alnan aenkraoiitfan section • lurch · 11ο Brftnnervorrlchfeun ¹ :?,

*. 3 a * rstlrnansieiit dar 3renn * rvorriohtuni5 naoh ? igS. 2 by raahfc »In this figure, and

;. Ί U. 5 other versions erfladungftiie ** but not in a pig. 2 rfittpreehenüen r) e, rateilung, Jodoeh with a construction that differs from that of the other version

»Oh Flg. In the refractory wall 2 of a blookiluron heating furnace, a Bronriar ^ ffnunit 3 is provided, which is in the oven on the right side of the found 2, on the outside 1)? ianl 2 is a jrenner * ') old tjinem irenner ^ ehiiusa 5 which as ^ oochineirste Bleoiikonjtru <: tion or as Cki3kon3trul: tlon is herseatelXt.

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The burner ghü line can ausf.iokloldot "on-ilbllöh ©" catfish with föuerfestma material 5o "be wa '' in 7IG 1 not shown - fc _s However LJF l;.? -., 2 on the Austrlttssält" the burner A Vsrtell ^ rplatfce C bofostlgt »the« l'nsM suitable- feu «-" • 3i »features xerar.itschou material, ordered · Kine Vorbrsnnun ^ sluft-IeIt Ufiss- 7 ri-.In-; io 6 in -las hohlo I an ure üft / j Ilre-nner ^ e houses> »Jurah -al.ι» In F, än ^ f * ricntun ..-- aylladriacua partition B from

is? fc u / u from diijaer to the rear bla «u a • set partition 9-« »ratrsc-kt, iti swei liammerh Io and subdivided 1st,

Dia feuer fa.vi ta air distribution plate ο £ contains rln-f.8 uia a

hr IC two consensus sings 12,13 of which • one 12 from the chamber Io uni dis -inJerön 13 from • ier Ksunmar 11 in the areantrr »ffnun ?; 3 ßvlndea. aaafÖrial.cer Fuel -at-flows from a supply line l'J into the burner tube

Dia Verbrcrinun _; ; nluft can vor, revNtrmt asln or niaht »· Is a preheating unii vorimndön»> / lrd a HdkuperÄtor. Eilt bGlaplelaweio « zytel Rohrbatterlen IG and 17 used, whose 7ürmeüb # r» tra ^ ungsrohrro 18 made of rustfree ^ steel or the like bettohon and arranged in the adhesive gas mount 19 «Ina, which the halter * burns sjsme · d« n through the uvennnr 4 behetaten Of «n In« lium suitable rabbit or another, »iaht dar ^ ea & ollfen Abstig leads« Hin aobliite 2o requests from ftuften ^ iau ^ * • air first through line 24 and d * nn "downward" through the drill 18 of the Ron · "battery 16, the Sun i" fSrderte air strürjt into a collector at Puii the pipes 1Γ the Hoftrbatterie 16 wid duroh a channel 22 in a distributor 23 aa Puü the ReJiuperatorrohre the 3onr ~ battery 17 "From there itrSn * al * tuft upwards into the line 7 »via which the Kaaisern Io and 11 'de« 3r «nöere are supplied with combustion · -» air, tksXm Dur aha tr * r * en dor Hohre 18 nlnsat the air large y% .vmßOteiHz & a a «a den iiel? 5 | i * ·· vbgaaun on _t which flow through the Haueftgaa-iüus ID and along the outer surface of this tube *

% of 'air passage opening to' ^

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Sin. Therraoelisient 2k) is placed in a suitable stable in the interior of the Gfenlcaronier and the furnace temperature is set off amplifies and controls a ffofror 26 with an oiled arm 27 _p which is in ubrKei ^ ersimi and clockwise according to a sun & hme or decrease in the electrical power generated by the dk , the changes in the ubrKei ^ ersimi are proportional to the i'e « jperaturüadex * ua (ien are inside the furnace, Her Ar.n 2? let over e-in Oestflm * o 22 with «learn 'Jetätlsun ^ a Hebel ainas folding» valves 3o in the fuel Kufürirleitun'v i'"i connected in such a way, aat a If the furnace temperature rises above my pre-ventilated l * art a Qewe. ^ Uaj * Jos Ventils 3o In the sense of a verification of the fuel supply to the rsnner h causes "Hm" reversed rd dor at elnsm falling Ofenterapftratur * unt rhall3 the optimum value, the valve further 2o; io5ffnet _t CDCR Ver-4p Ijrennstoffsufubr.

You fuel station; lh includes an oil end 31 # and the air supply line one 31 © mie 33. Dl © presses stro »- and stream down this blend« n plates are through

33 baw »3 ¹ J on a well-known construction for the fuel / fuel ratio exceeded, where · \ fi the burner k over the Liitun ?; 7 supplied combustion air aioh does it yourself; according to the line 11 in la? » lirennerrohr 15 guided »fuel length« adjusts. As already mentioned, i # lrd tils 4e? N 3renn «r H supplied a fuel of fiaen depending on the position of the valve 3o in the fuel on clock line lh beatimnit» and this »valve is in abh1ni; i £; keifc from When the furnace temperature is changed, the controller 55 sends hydraulic or pneumatic lines 8 via lines 8 to a motor 39 | The motor 3 $ adjusts the tilting valve 3 # in the air flow control unit via the control unit 37; 7 in «in * more open odor closed» Stellunj; » 5 » n ^ ieh an increase

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or decrease in fuel supply * The ratio between fuel and air can be precisely and automatically regulated to a pre-determined value * The ratio is usually chosen so that an air volume of 10 % over the istoichiometry for daa Burning of the fuel guns continued in each case ^ c ni ^ tI ^ e '! »Uftpten & ß is supplied ·

A flap valve Uo ₉ is located in the combustion chamber

pivotable at the upper edge of the Tpermv / and 9 at is »*; in engine ^ S k & nn the valve flap over tsiq ^} I2» ^ 3 * ^ .betstilen, and the Hotöf will üfeer öinen «lelctri ·» strotakrpis M by a burn of fmettßenmeQ "he ^ 7 he · D © r pressure difference K ^ isohen to apply opposite sides of the fuel ·· Blenaonplatte 31 wlrcJ about 'lines 33 and HB on AEEN Hentjeniäeseer 4? transfer. The jMengsimeseer is supplied with Strora from the * ietz ^ 9 and sends an eloctri · »sciien ütrora through the lines k6 now for the BdtHtiüunE de * Klappventila ^ o & uf the eptttor foeaciirobenn«

The furnace is covered with heated and durable steel blocks, which are then subjected to vials or shells. When the furnaces fed · chamber and the stove top »» ite of Kanmer duroh one - is refractory -Mckel closed ,, the burner b Bronnstoff and combustion air entßprechend normal tnaximaler power are ausfuhrt, where as "Brennet of valve o and dae t? The valve 36 © tw ^ vollatfltiiis are deflated «while the valve * flap ^ o assumes a vertical open position, wi« ^ ia, 1 be Et, _ ■ ■.

Combustion air flows into the two to and 11 dos Brennera and aodaan with a high nindestaina 61 a / »© o. or more, through the formation of the hinge of air outlet s3ffaungea 12 w \ u 13 cur maintenance of the ferrule that through the cross tube 15 and the ftvnnefdffriuns 3 in 41c kiln caraners c introduced fuel ·

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The flame generated by the fuel transfers ' Mvm on the steel block 'and on the refractory wall''and the 3escl: el <i9r OferÄaminär · Ea as! BelaplalaKoiae auitenoTOidn' that

dia! 313cke to sine £ leicu.8äöX £; e temperature of about 125o ° C heated jy [-5u iiur # hw3rmt · In this case the Ofonfeuorun.i.10 üesteu * 3i * t _# that the temperature of the steel block © ■ lie Temparatur »from 123o ^D CJ not weaantelicii ilbtratel ^ t, oi> achon dia f ^ uorf eaten wall« and the "" dachshund of the stove "« touching Aüfhi> Isperio <* e oil hellpe -Ii temperature than the block ·

Zua Brslelen. a;! ^ ohen Productionslaistim lot there "rwünecht" In Ofsnkanaaer much burn ape wio · ra 3gllch to "?

burn without overheating the steel block. Dsaijalb is? .U. "Je.'iinn one Auf ^ ieissyJilua an aaximalsa ^« uar aufroahter ·· iialt ^ n, bia lie walls of the Ofoiikanans reached the Or ^ naj- or S ^ ollwert, filled in the Teniperaturre 2Π ain, i * efitfullwert has; 4 @ r rafcurr3 <? lßr Detltl ^ t then tibsr dorv circuit> 2 »the engine and iUs Heatäiii; * ^ TtSB _0. * !!) da» .Ventil ^ o in the sense of a gradu- • llon Vernilnäsrun? * The fuel supply,? & llt In the SOlse the temperature -lar furnace walls under the elRgaßteilten orwert ₉ wevi the 3renn3fufsr.feuf ? EinregeXun.i the desired temperature

? u ..lo.'ilnn the Aufhelxperlode let furnace k "-nnön dl®

cool ötahll> 13eko et ri * Vfiirmu abaorteleren »and the furnace would not get much hotter than the steel block« j rait zu «hraen <. i ;; t 41q temperature 4er ovenJcÄKnnrwänic over the stiollwert · every time so Λ ^ r often "n Λ1" i1r "n" temperature er _r AFira alc?>renr> atoffaufuhr Vör ^ lndlert unl then again .rDu-yrt, wonn Ui "Ofemiantlteiapsratut * abfallt * Equal alf / aar alternating Yermind" run-.i and V ^ r ^ 2 "3'ierun ^ the ßrenuetoffzufuhr vrlrd tiie air supply reduced to proportional and deprived» it ililfo <ior control means 55 _f Tfptf · Dit * a * Anste.t / jftn dftr temperature to the preset

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The setpoint and the throttling of the fuel supply are repeated many times during the heating period. With increasing bloak temperature, a progressively smaller amount of fuel is required to reach the setpoint temperature. During the first phase of the heating period, the flap valve J | o remains in its vertical open position, and the extent to which the valve 3β the combustion air supply throttles _f I3T not so largely to the high speed of $ sen from the air outlet 3Öffnun 12 and 13, the air flowing under 6tra / SAE> su drop,

because the combustion management has reached a state where a third of the normal maximum burner output is no longer required to reach the setpoint temperature, does the fuel flow meter move 4? with the help of pre-divided 3 control organs that are present in it via the tear-offs ^, Λί, - ^, ^, ^ ο, ^ β ciaa folding valve * o released from the pointer in its horizontal position on the left since the partition © 9 _$ what "for FoI $ © has, that the supply of combustion air into the arennerlcaroraer 11 and ear Äuetrltt 1st off of air through the Luftaustrlttsöffnunisen 13th If only a single Xuftkaramer were to be provided in the burner, as in the usual arrangements, and the Klapjyventll ilo wagf all “the burner output and the air supply could be throttled accordingly to any desired value, but the throttling to a value below two thirds of the maximum flow rate an air speed of less than ßlm / sec. result «There is then insufficient kinetic energy of the flames and combustion products to maintain uniform temperatures over the entire OfönkaBinier and for all block steel bodies. With the arrangements used so far, this situation has had a very unpleasant effect, particularly during the warm-up period of the oven Solving these problems provides one of the main advantages of the present invention, as will be described below.

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Bel In a horizontal position to the left £ Klapjiventll 4o (Fig. 2) the stove drive continued with between a third and a third of the fuel supply for noraalo maxlwal.e firing fluctuating «*!?! 4th As mentioned above, i3t dafxlr ^ eisor ^ t, öaft the temperature of the

nla About the set

atei ^ t. When the steel blooms e1iw? 4 <iie temperature of 123o ° C «rreiaUi? N _# l» eMirk «n 4ie ^ eschildex'tjen Ptaalmniumm and devices olrte Πονο'ΐ ^ Πί, ΐ dos Klappvoritils \ m IBo ⁰ in the hox» izoirtale La ^ s to <TSSR right side of Trennwand.9 * in this state, di 'supply before * combustion air into the Io and the eu Durohtrittaöffnun ^ s 12 is abfceschaltst * and only ai "Tsr ^ nnerkiiiBnier ii and aio DurehtPittaSffmunden 13 h in belly i * ätri "b" by the NIE TJierRioelemfefit 3 * 1 and the dieaera au · parent Vorrioiitun ^ s ^ banded lircnaatoff ufuhr is depending r'eda.i? fv © ryriSßert and reduced _# ur, the temperature i is in OCenkümmer at i23o ° C "we keep under Umstäiiden ·

'3rade about dissem' .tfcrt until everyone is in the deep oven An i »a very lightly expensive ten ^ eratup voa 123o ° C

reached hafcen. Ss ör & lch5lich _f 3aä thanks to the described n ^ & ^ forrn of 3rennervorrichtun the combustion air every since η oriaalon Ofenbstricjbaa least one StriJmun.g: age · 'TQIT of 6lm / 3 ° C. with the exception of "Yourcnd the second a _$ within which the folding vatll Ί © changes from a position _P : in &% <& others" This means that a v "Qnö- ; sn <2s kinatiaeh © energy of the flames and the combustion, ', 3produ \ to present within the furnace chamber''to araielert and upright the coffin bloeklcjrper in all ofonfcoilsn and tibor -

V. & is not necessary during the amber-perlode, the

fi sura üpseur.en auorelehisader kinetiachör energy the Plamraan ujii Verbreanunrsepr © dukte KU vergyrOaern ,, vie you · Uoi the unsatisfactory previous Betriabtweiie Hblieh Mar.

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The main aspect of a burner experience with increased excess air during the throat period consists in the fact that it increases the degree of riuucier on the surface of the steel blocks. Oarilc of the present invention corresponds to the host. eah & ftliehe Caw: .. m "of; nit reducing d» r scale formation under dan const usual extent be achieved icann, quite the carats C-Jr the 3rennetoff, the RVs heating and Durchwür "whom a Voust; .lndii: en" Jeschiclcunfs the furnace "with steel flowers

After heating and warming up the steel blocks, the döokf. <L d & r furnace ^ x 'soup ab.rehobön, the supply of uronnstoff and air from the "usual l'iois" switched off and aln ! Uocii hertfea -.'; 0nor. Tnen aur processing; Bew in the rolling mill on dor Sdhrniedöpreaae, After herEusnehmon a Blookes the lid is vtfieder _t;. caetÄt and the firing of the Ofene again switched nacii need by up zura removing dee niieh- • th block dan jjewflnechtcn Warm · ssustand the Ofonkamin "r and to restore the remaining illiicko

»5. ^f f and 5 VijranachauBtthon an embodiment of the Bronn «r device, where the different groups of the air a et rode β« öffsuiniso «12 a and 13 a in a single circle forini; san Riiif; around the outer end of the burner tube lf> a is arranged, the air outlet opening 1? a otehon in connection with Luftlcarauor Io a, TiäJirond dia openings 13 α via the line 11 a with the air chamber 11 i> connected oind. Oils chamber 11 Ό and the inside of the lines 11 a kiinnen al * Luftaufn & hmetanme? been considered. The burner with "one" flap valve Ho a can be operated in the same way as the burner H naoh pin, i to 3, whereby during normal maximum air pressure all air outlet ports 12 a and 13 u are supplied .

! E * was finally noticed d 'Ä amendments of the ge ~ "chi Id he th Au * führunr;" bci8pielo mi i; are llch, the ilaamen the invention to bide without, · - ■ _c

-Patent claimso'ae-909822/0285 -13-

Claims (3)

1. 3rennervorriohtuni5 for industrial furnaces, especially others for deep furnaces for heating and warming up steel blocks, with two air caraners arranged concentrically to a fuel supply duct, with air outlet openings concentric around the fuel flow opening. a in a vertical plate that closes the burner housing against the furnace, marked by fittings (33-39) for maintaining the fuel-air-ratio during calibration for the purpose of changing the temperature? Changing the fuel supply sovrie through devices (Ί0-Μ5) for the optional charging of the air chambers (lo, ll, loa, lla) of the burner with combustion air in order to maintain a high, at least 6om / sec. The amount of outflow! reachwlndi ^ kelt the air through the associated air outlet B openings (12 and / or 13, 12 a and / or 13 a) in the distribution plate (6). 2. Burner device according to claim 1, characterized in that The overall cross-sectional area of the air outlet s'3ffnunßen (12,12a) a Kamaer (lo, loa) bigger, preferably about twice as large as baw · as that of the Luftujiatritts'Jffnunsen (13,13a) in the second chamber (11,11a) is. 3.Hrennervorriohtun ?; naoh address 1 or 2, gekennsQiotmot. iUuroh eino ^sonioinsame air supply to the .Caauern (lo, ll, loa, lla) with which the Einriohtungen for Φι-j Konstanthulton daa Ironriaboff- Luft-TtLsohung3verhillt- 909822/0285 H51465 η1αυβ3 connected 4lnü _t and ndt a: »K vontil Oo) known per se for the iiä}? lvrelsse Vareü'iiiiiäitn otner dar both * Karamern: e; en silo Luffcsulelfcung (?} * 909822/0285