DE2022312A1 - Liquid fuel burners - Google Patents

Description

The invention relates to a burner for liquid fuel with a hollow burner body receiving a coolant for receiving a coolant, an annular main channel for supplying an oxidizing agent and with at least another annular channel for feeding the fuel, which is arranged concentrically to the main channel and with this through at least one lateral fuel supply opening or one Set of side fuel supply ports connected to «.

Such burners are used to a large extent in industrial plants, for example steelworks. Oxygen or air or air enriched with oxygen is used as the oxidizing agent, and a liquid hydrocarbon, for example, is used as the liquid fuel; ^.:; "■ ^■:;::: -:::: '

With burners; this: kind turn measures taken, 'um stmbile Yerbrennuiig Innerfea3. "fe' ^: eiaee Tbe

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"ensure that the fluff-stabilizing vortices are generated with the help of the hot combustion gases. For this purpose, various measures can be used, for example the" special design of the burner nozzle surface and / or a plate quiver "or" one in a "special way trained heating or Beaktionsrauia to which the burner is connected

The largest portion of eggs can be seen in those with a high Intaasity working. Industrial burners ordered in the resulting very noQem noise level, though the noise of the burner in many cases partly due to the stove Pure construction dampened

In the patent (patent application P 19 60 754.6)

a burner is described which ensures stable combustion within a large operation, and in which, as a result, the operating noise is erlasfelicli reduced; die— s & ^ B ^ smäqs? can a with a gaseous fuel, e.g. natural gas _p

With CiQT invention will now EIA burner who created cisifiy ier provides the same advantages as the burner after said Pat © ₉ at which _s is, however, suitable to be operated with a liquid Brs & nstoff ".

äQT invention, in iron burner of the above-mentioned ®n type in the main channel & Strömungsriohtung st behind eiaos eei "älie a @ a Brennstoffzuführungsöffziang or" behind a Satfi '<ron seitliclieti fuel supply ports thickening (From!. "-";; © ISSR or Uailenkkörper), which is however set back inwardly with respect to the end face of the burner that even within the burner a common ring-shaped outlet channel for the fuel and the oxidizing agent is formed even after the thickening.

Di © foräielsiiEg. causes a pre-stabilization of the flame, since Bi-fi öie Bi'föltQ & © s. Hauptkaiaals near the end of its aiast step considerably enlarged ο and © im © 'Su.vhnlens fear ^ orrafi ;, which the oxidation «

^ 00 98 4 77 1 2 4β - " _BAD ORIGINAL

medium mixes more intimately with the evaporating fuel and the Flame in. This mixing zone is fixed. As a result of this pre-stabilization the combustion of the mixture from the fuel is running and the oxidizing agent evenly away from the point of ignition so that a flame is obtained whose noise level overall is considerably lower than that of the flames of known burners, which are stabilized by being hot Gases are circulated in sight on the face of the burner, and which have a suddenly arising flame front, they look at a small distance from the Brsn & estuary trains.

The thickening preferably has a flat end face which is essentially at right angles to the direction of flow of the main canal runs

In an advantageous embodiment of the invention, the thickener may be disposed on a lateral wall of the main channel and formed äes by a sudden expansion of the cross section of the main channel, be · In another advantageous embodiment of the invention is the thickening apparent from the partition wall of at least a partial Main channel is arranged in the direction of flow in front of the thickening and divides the main channel into an inner and an outer part.

The invention can be applied not only to burners producing a long flame, but also to burners which are designed so that they produce short umbrella-shaped flames or wide-angle flames with a large opening angle. Around To achieve the desired effect, according to the invention, the inlet channel at the outlet end of the burner is essentially conical constant cross-section and diverges in the direction of .., ie burner end face, the thickening in the conical part of the ring channel is arranged

00984 7/12 * 6 BAD ORIGINAL

The invention can also be used in combustion devices of the type described in British Patent 1,055,58, in which the burner face forms the bottom of a substantially cylindrical flame chamber which can be in communication with a heating or reaction space the presence of the verdi penetrates the flame through the inner and outer tortis-shaped rolling of hot combustion products at ab il isi © y? t _o

The invention and advantageous details of the invention-A application are explained in more detail in the following with the aid of schematic drawings using examples »

Fig. 1 shows in a longitudinal section the front part of a burner according to the invention,

FIG. 2 is similar to FIG. 1, but shows a modified one

Embodiment of the invention ₀

Fig. 5 is a similar section showing another embodiment of the invention «,

Fig. 4 shows in section an embodiment of the invention «, in which it is ensured that a pilot fuel φ can be supplied®

Fig® 5 shows in section an embodiment of a burner ssum generating an elongated flame in which it is ensured that a pilot fuel can be supplied.

Fig. 6 is a partial section through a combustion device. the one with a Tireiteren embodiment of a burner is equipped according to the invention.

Corresponding components are shown in all figures denoted by the same reference numerals. The torch body is hollow by an annular hollow component 1 and a central one

009847/1245

arranged hollies barrel part 2, and ^ each of these "Both components can absorb a coolant. To this to enable is in the annular burner body 1 a cylindrical partition 3 arranged, which in a small ' Distance from the front wall of the burner body ends and the The interior of the burner body 1 is divided into two concentric annular spaces for supplying and removing a coolant. In the central hollow barrel part 2 is coaxial with this a coolant supply tube 4 is arranged, which is in the nasal or the front section 5 of the running part 2 opens.

The central barrel part and the hollow burner body are separated from one another by a ring-shaped main channel 6. The barrel part 2 delimits a fuel supply channel 7 on its outside, which is connected to the ring-shaped main channel 6 through a lateral opening 8. The opening 8 can be an annular slot or a set of radial openings which are formed in the inner wall of the main channel and are distributed at uniform circumferential intervals. In the direction of flow behind the side opening or the side openings, the outer wall of the fuel channel merges into a thickening 9 which has a flat end face 10. This end face of the thickening can also have a slightly concave or hollow conical shape. In the flow direction beyond the end face \ 10 of the thickened portion 9 is "offset opposite to the end face 11des burner inwardly .-. Terminate the channels 7 and 6 responsive for supplying the materials, ie the fuel and oxidant in a common exit ■ channel: 12 · ^; ; ^{:; ;} '^:; : ^; ^ ^{; :} ■ ': ■ / ^■:

The burner described with reference to i'ig, 1 is suitable for generating a "umbrella-shaped" flame, and zn this purpose, the end portion of the main annular channel

6. in such a way, conically formed, that it ^{diverges in Riciiti3.Hg:} mxi the outlet end ". The feräielmng. 9 A ^ conical rope of the. Main canal. eng.eordaet; tiad; "& ei.

Embodiment formed by a sudden enlargement of the cross section of the inner wall of the main channel. The fuel supply channel ends at two successive supply openings. . "bsw fSätzen of Zuführmigsöffnungen, the first opening 8 bsw _o of the set of openings 8 opens in the lateral Bichtung in the main channel 6 in the flow direction of Verdieteung pre- 9 _S while a second opening 15 in the main channel to the ö © r sideband. The main channel is at the edge of the end face 10 of the leakage 9 ends, _{so the fuel flows natex 9} so that part of the fuel passes through the stabilizing edge of the opening 8 of each side opening and a further part of the fuel can be atomized on the outer edge of the thickening kamio The opening IJ can be ringföxaig.

Extends in the embodiment shown in Figo 2 ÄiisfiäMr-n-iigsforia; sic.m the Yerdicloaag 9 by a partition Ί4 ans ₉ in the ■ rlnom. Part of the H i2ptkanals 6 in the Sti? ÖsEngs5? Ichtung in front of the Ve ^ ciicfeag aza is arranged in the Haraptkaaal over a part : yilvj: u: ZJbus® ^ iron inner and eiaea outer part -sub- "üs ^. 'I / üo Bsi; the end of the fuel channel 7 is subdivided into EViet channels, and swas? eiasia first channel _s ■: lex · forms an extension of the fuel channel 7 and across the side opening 8 © the one safe line i7 © a side channel. aingöii 8 in the flow direction iror & st "^ erdicMing 9 in the inner part of the main channel 6 opens ₃ so?) Is a second branch ^{channel 15» ä, e2?} social dursia. the partition 14 Q5? stretches and over a side opening 16 or a .8 at ζ Ύοη side openings 16 in the outer part of the main channel MtLaciet © In this Ausfüiartmgsfona τιίτύ. dej? Stream of the Oxida ~ tiöiasjnit'tels through the partition 14 and the throat 9 uirösrteilto Crlei © Jb. On the side the pulp stream is also divided into two parts, sq that a rope oss fuel ia • joden döi? b © iö, © a © siidatioasmittelströa® Mssia dusts - ■ H'i'it-ίί ..

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2Q22312

At the in! Ig. 5, the partition wall 14 extends over the entire length of the main channel _r which it divides into an outer rope 6a and an inner part 6b. The fuel supply channel is formed by a channel 7, which extends inside the partition wall 14 and ends in the direction of flow before a thickening 9 which adjoins the partition wall 14, and two lateral openings 8a and 8b or two close to the channel 7 Sets of such side openings at | the or each opening 8b opens into the inner part of the main channel 6, while the or each opening Sa ₉ which extends in the opposite direction opens into the outer part of the main channel «

Alternatively, the partition does not need to be over the the entire length of the main canal, but it can also be designed as shown in FIG. The channel 7 can be tubular or ring-shaped or a · have any other shape.

Fig. 4 shows an embodiment of the invention in which it is ensured that a pilot fuel can be supplied. For this purpose, a further channel 17 is formed in the thick outer burner body 1, which channel is arranged concentrically with the main channel 6 and the fuel supply channel 7. The channel 17 opens into the main channel 6 via a lateral opening 18 or a set of lateral openings Ία in the flow direction in front of the thickening or the projection 9> which in this embodiment is formed by a sudden increase in the cross section of the outer wall of the main channel 6 and is arranged ₈ so that it disturbs the continuity of the flow. The channel 17 can be tubular or ring-shaped or have any other shape. "■■ - '-:::;::

Fig. 5; ^; ^ St a burner according to the invention for generating a horizontally extended flame, "in which it is also ensured that a pilot fuel can be supplied."

0D9847 / 12A5

The thickening 9- adjoins a partition 14, which extends over part of the length of the annular main channel 6 and this channel locally in an inner one Main channel and an outer main channel subdivided »In the inner main channel the fuel is atomized, which it through a lateral opening or several lateral openings 8 near the end of the fuel channel 7. A Ignition gas is the outer main channel through one or more side openings 28 near the end of one Züiidforennstoff line 17 supplied »As a result, in the outer main channel is a premixed flow consisting of an ignition gas and an oxidizing agent, a pilot flame generate which starts from the free end of the thickening 9.

In Fig. 6 is another embodiment of one according to the invention Combustion device shown in the the end face 11 of the annular hollow burner body 1 has a larger surface area, so that this area together with which the rabbit or end portion 5 of the barrel part 2 forms the bottom of a flame chamber 19, which at its other The end is open and delimited by a hollow side wall 20 through which a coolant can be circulated, since a partition wall 21 is arranged in its cavity in order to subdivide the cavity into two concentric King channels ^ which are in communication with one another at the front end of the side wall 20 =

In the hollow burner body 1 there are one or more Pipes 22 arranged for supplying a coolant.

You can change the shape of the flame at will by having the bottom of the flame chamber 19 opposite the Side wall 20 is arranged differently. The effective length of the flame chamber should preferably be between 0.1 times and 0.8 times the diameter of the flame chamber can be adjusted.

ü 0 9 B /> 7/1? A 5

In this embodiment, which also have a Pilot fuel supply channel 17 for a gaseous Includes fuel, the pilot fuel channel opens into an isolated part of the main channel via a side opening or a set of side openings; this isolated The end section of the main channel is separated by a partition 14 delimited, which extends to the outer side wall of the annular Main channel 6 at their facing in the direction of flow The end that merges into the thickening or the widening approach 9.

It should be noted that the constructions described above are only exemplary embodiments, and that it is possible to use all of the embodiments with burners to produce a long flame as well as with To use burners to produce an "umbrella-shaped" flame, and to use any of the last-mentioned constructions in connection with a combustion device in Pig «, can apply the type shown

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Claims (1)

Liquid fuel burner with a hollow Brenns2? Kci2? Pe3? zms AufaslMga. © in.es coolant ₉ a ring-shaped Haliptisanal sum supply of an oxidizing agent and at least eiiiGB further hanging channel for supplying the fuel; the KonsGateisoh aojE main channel is arranged and connected to this by at least one © side © fuel supply opening _{or a set of lateral fuel supply openings s da-} = OuK ¹ CiI ge t Q Ii a ζ eic Ii η et _g that a thickening (9) is arranged in the main channel (6) in the flow belt material of the or each lateral fuel supply opening (8), which, however, is located opposite the end face © (11) of the burner inside auieÜGl'cgesetat _s -is is formed so that inside the burner, a common annular outlet channel (12) for the fuel and the oxidant. " 2 ο burner according to claim 1, characterized GEK ennzeieh a β t _f that the ferdickung (9) a ehene end face (10) extending ~ in ϊ / q se nt loan at right angles to Durchströ mangsrichtung of the main channel (6) extends » 5 ο burner according to claim 1 or 2 " thereby g β ke η η ζ sic ti η ® ΐ ₀ because the thickening (9) is attached to a side wall of the Hoiiptkanal (6) and is formed by a sudden thickening of the cross-section of this side wall" O O 9 8 4 7/1 2 A 5 4. Burner according to claim 1 or 2, characterized in that g e k e η η drawing η e t that the thickening (9) is connected to a partition (14) which extends along at least one part of the main channel (6) in the direction of flow before the ver ~ thickening extends and divides the main channel into an inner part (6a) and an outer part (6a) » 5. Burner according to claim 5y characterized g β k s η ■ = * .... ze ic hn et that the fuel supply duct (7) terminates at two successive follow dien supply ports or for two consecutive sets of ZuführungsöffBungen _(8? 13), wherein the or each first opening (S) in the main channel (6) opens laterally in the flow direction in front of the thickening (9), and wherein the or »every second opening (15) in the main channel at the edge adjacent to the side wall of the main channel the end face (10) of the thickening opens * 6. Burner according to claim 4, characterized ge k e η η - ζ ei ch η e t that an end section of the fuel supply channel (7) is divided into two channels, namely one first channel, which has a side opening (8) or a Set of side openings in the direction of flow the thickening (9) opens into the inner '-i-' part of the main channel, and a second branch channel (15) »which runs through ascial the partition (14) extends and has a side opening (16) or a bunch of side openings in the outer part of the main canal flows into " 7> Burner according to claim 4, characterized in that g e k e η n ζ e i c h η e t that the partition (14) is in the flow direction in front of the thickening (9) over the entire length of the main channel (6) and that the fuel supply » rüngskanal (7) e ^^ en is formed within the partition extending channel, which in the flow direction before the thickening in two side openings or two sets of side openings Openings (8a, -8b) merges, the or each Opening (8b) of one set in the inner part of the main channel opens, wälirerid the or each opening (8a) of the other set ; : OO 98 47/1? Λ5 ^ i; runs in the opposite direction and flows into the outer wedge of the main canal » 8. Burner according to one of claims 1 to 7 _S, characterized in that a further annular channel (17) for a pilot fuel "preferably a gaseous fuel _{9 is} provided, which in the main channel (6) via a lateral opening or a set of lateral openings in." the stream direction opens before the thickening (9). 9 «Burner according to claim 1 or 2 _S, characterized in that a further ring channel (17) is provided for a pilot fuel, preferably a gaseous fuel, which opens into an isolated end section of the main channel (6) via a lateral opening or a location of lateral openings , the isolated end section of the main channel being delimited by a partition (14), at the end of which pointing in the direction of flow the thickening (9) is formed «, 10. Burner according to one of claims 1 to 9 »characterized characterized in that the side openings are a set of about the circumference of the side wall of the main channel (6) form distributed slot-shaped openings, = 11. Burner according to one of claims 1 to 9, characterized in that ■ that the side opening the slot running in the circumferential direction is » 12. Burner according to one of claims 1 to 11, characterized in that the annular channel (6) at his The exit end is conical, has a substantially constant cross-section and is directed towards the burner face (11) diverges, and that the thickening (9) is arranged in the conical part of this annular channel. 13. Burner according to one of claims 1 to 12, characterized in that the burner end face (11) the bottom of a substantially cylindrical, with a 0 0 9 8 4 7/1245 Flame chambers connected to the heating or reaction chamber (19) forms * - 14. Burner according to claim 13, characterized ge ken n - ζ e I η et that the side wall (20) of the flame chamber (19) is hollow and can hold a coolant ₀ 15V burner according to claim 13 or 14, characterized in that ken η ζ ei without t that the axial length of the Ϊ1 arm- = chamber (19) is adjustable. OUiMJi 11 1 71, 5. Blank page