Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
  • F23D14/46—Details, e.g. noise reduction means
  • F23D14/48—Nozzles
  • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
  • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
  • F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
  • C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
  • C23C16/453—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating passing the reaction gases through burners or torches, e.g. atmospheric pressure CVD
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
  • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
  • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
  • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
  • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations

Definitions

• the invention relates to a gas burner according to the preamble of the independent claim.
• the gas burner is suitable for generating a flame field with properties such that it z.
• a flame field with properties such that it z.
• CCVD process combustion chemical vapor deposition process
• Devices for the flame treatment of large substrate surfaces, z.Bsp. of quasi-endless polymer webs, paperboard, metal foil, extruded melt curtains, or combinations thereof are usually equipped with one or more gas burners and with a means (e.g., a rotary drum) for transporting the substrate through the flame field generated by the gas burner through or past it.
• a means e.g., a rotary drum
• the flame fields are in the form of flame bands that extend perpendicular to the direction of travel across the width of the substrate.
• the quality of the flame treatment which can be achieved when carried out in a device of the type mentioned, is very dependent on the uniformity of the flame band, in particular over its length, ie perpendicular to the direction of movement of the substrate and the temporal constancy of this uniformity.
• the flame field needs a relatively high flame density, where the flames must be as equal as possible and burn as regularly as possible for as long as possible.
• Known gas burners for generating flame fields usually have a gas plenum with a gas supply port and a perforated wall portion on one side thereof, the supplied gas leaving the plenum through the perforated wall to be burned on the outside thereof.
• the perforated wall z.
• a perforated plenum wall With such a perforated plenum wall, a high density of small, sufficiently long nozzles can be realized.
• the nozzle cross-sections and the nozzle lengths vary substantially randomly within a range, which proves to be insufficient in an application for high-quality surface treatment.
• a gas burner which has a plurality of slot-shaped openings arranged next to one another in a tubular burner body.
• a shield is arranged, which also has openings whose position and shape is adapted to the openings in the burner body. The shield serves to protect the torch body from excessive heat stress.
• the nozzle plate is made of a plurality of folded sheet metal parts which are arranged interlocking. In this way, nozzles are formed for the gas. Since the sheets are folded, it may happen that the surfaces of the sheets do not exactly abut each other and the gas flows in an undefined manner through the interstices. In addition, the openings are not straight through, but the gas flows around the corners of the sheet metal parts. There are therefore no exact and stable firing conditions.
• the object of the invention is to provide a gas burner for generating a flame field, wherein the flame field generated by the gas burner according to the invention should be at least as well suited for a most significant flame treatment of large substrate surfaces as a flame field having with the above, a one-piece nozzle plate , known burner is produced.
• the manufacture of the burner should not limit the relationship between length and diameter of the nozzles.
• the gas burner according to the invention comprises a burner body with a gas supply port and a nozzle plate, the burner body and the nozzle plate forming a gas plenum and the nozzle plate forming a perforated wall region of the gas plenum.
• the nozzle plate of the gas burner according to the invention has a stacked arrangement of a plurality of metal sheets, wherein the metal sheets are shaped and arranged in the stack such that the stack has a plurality of nozzles which extend from a plenum side to a flame side of the nozzle plate.
• the nozzle plate is preferably designed as an independent of the actual burner body element, ie it can be made regardless of the actual burner body of the desired number of sheets and subsequently ssend be connected to the burner body.
• the burner body may be open in the area where the nozzle plate is mounted or have a wall provided with gas penetration holes.
• nozzle openings are formed by the combination of a plurality of sheets, in particular at least three sheets, whose diameter in the longest direction is smaller than its length in the outflow direction of the gas.
• the sheets may be substantially perpendicular to the nozzle length and have determinate through openings (as opposed to the random through openings of a porous plate) with the through openings of all sheets of the stack at least partially aligned to form the nozzles.
• the nozzle length can be increased in a simple manner by increasing the number of sheets.
• the sheets may also be substantially parallel to the nozzle length, wherein at least a portion of the sheets is comb-like, that is, provided with a toothed edge aligned with the flame side of the die plate.
• the gaps between the comb-like teeth in a sheet work together with the adjacent sheets as nozzles.
• the nozzle plates of the burner according to the invention typically have a rectangular shape with a width of several cm (for example 3 to 20 cm) extending in the processing device parallel to the material transport direction, a length of up to a few meters (for example 1 to 3 m) and a thickness of between 5 and 20 mm.
• the nozzles extending from the plenum side through the nozzle plate to the flame side advantageously have cross-sections with dimensions of the order of 0.5 to 2 mm and distances between the nozzles of approximately the same order of magnitude. That means the relationship between nozzle length and nozzle diameter is between about 2.5 and 40 at a nozzle density of z. Eg 0.25 or 0.5 nozzles per mm 2 .
• the sheets are z.
• Example of metal preferably of steel (for example, carbon steel or oxidation-resistant steel), brass or bronze.
• steel for example, carbon steel or oxidation-resistant steel
• brass or bronze Typically, they are 0.5 to 2 mm thick (preferably between 0.8 and 1.5 mm, for example 1 mm).
• Suitable such sheet metal material is available on the market, even with a pattern of determinate openings (perforated plate).
• the sheet material may be cut to size and optionally provided with through openings or comb-like serrated edges, e.g. Example by means of laser cutting, beam cutting or milling.
• the sheets are produced by stamping, using a punching tool which can either punch an entire sheet at a time, or can produce sheets by continuously punching a quasi-endless strip of sheet material.
• a plurality of sheets are stacked on top of each other and connected together in the stack, wherein the connecting means may be a part of the burner body or form an additional part of the nozzle plate. It is also possible to weld the sheets together at least along part of their edges.
• the sheets are preferably flat and straight for stacking, i. each have planar top and bottom sides. The upper and lower sides of adjacent sheets then lie flat against each other within the nozzle plate, so that preferably no gas can flow through in the contact region. Since the sheets are preferably not bent, adjacent layers, which together define or define a nozzle, are simply shifted against each other and thus aligned exactly with each other. By moving the cross-section of the nozzle openings can also be varied and adapted to the specifications.
• the flame fields produced by burners according to the invention are able to meet the highest quality requirements for flame treatments and, in terms of production, are significantly less demanding than the known one-piece nozzle plates made of bronze. _
• Another advantage of the inventive burner is the simplicity with which the nozzle plates can be created or adapted to different requirements (different methods, different gases, etc.). It is possible to produce a large selection of different nozzle plates with only a few different types of plates by stacking different numbers and / or different types of plates. Furthermore, sheets of different materials can be combined, for. For example, a sheet of a very heat and oxidation-resistant, and thus expensive material for the flame side of the nozzle plate, and a plurality of sheets of less resistant and thus less expensive material on the plenum side of the nozzle plate.
• Another advantage of the inventive burner is that the nozzle plate from the burner body and the sheets can be separated from each other, which allows a simple and thorough cleaning of the nozzle and thus gives the nozzle plate a long service life.
• Figure 1 shows a first exemplary embodiment of the erf ⁇ ndungsgefflessen gas burner, wherein the sheets of the nozzle plate are arranged substantially perpendicular to the nozzle length;
• Figures 2 to 4 show the nozzle plate of the burner embodiment of Figure 1 in an exploded view ( Figure 2), in a view from the flame side ( Figure 3) and in a view from the plenum side ( Figure 4);
• Figure S is a second exemplary Ausfschreibungsform the erf ⁇ ndungsgefflessen
• Figures 6 and 7 are the sheets of the nozzle plate of the Brennerausbowungsform according to Figure 5 as an exploded view ( Figure 6) and in a stack forming part of the nozzle plate arranged ( Figure 7).
• FIG. 8 shows a cross section through a further embodiment of the gas burner according to the invention.
• FIG. 1 shows a first exemplary embodiment of the inventive gas burner, which has a burner body 1 with a gas supply connection 2 and a nozzle plate 3, wherein the burner body 1 and the nozzle plate 3 together form the gas plenum and the nozzle plate 3 a perforated wall portion of the plenum.
• the nozzles 4 of the nozzle plate 3 extend from the plenum side 5 to the flame side 6 of the nozzle plate 3.
• the dimensional ratios of the burner of Fig. 1 do not correspond to those of a real burner.
• the burner body will usually be longer and the nozzles smaller and closer together than shown here.
• the nozzle plate 3 has a plurality of laminations 10 (e.g., six laminations as shown in Figure 1) which are substantially perpendicular to the nozzle lengths, have determinate through openings, and are stacked such that the through openings of each plate are sufficiently aligned with the through holes of all other sheets in the stack to form the nozzles.
• laminations 10 e.g., six laminations as shown in Figure 1
• the sheet stack 10 is z. For example, held together in corresponding, over the length of the burner body 1 extending grooves and fixed relative to the burner body 1.
• the stack may additionally be stabilized with rivets or bolts passing through corresponding holes throughout the stack or through a small number of nozzles, or with weld connections along the sheet edges.
• Figure 2 shows the six sheets 10 of the nozzle plate 3 of the burner according to Figure 1 in more detail.
• the six sheets belong to two different types of sheet metal.
• Four sheets of a first type 10.1 form the flame side 6 of the nozzle plate 3 and have a pattern of z. For example, round through holes (holes) are formed, each opening feeding a flame of the flame field generated by the burner.
• the sheets of the first type 10.1 consist for.
• a metal perforated plate which has a regular pattern of arranged in parallel to the sheet edge rows of holes, the holes of one row are each aligned with the distances between the holes of the adjacent rows.
• perforated sheet steel material is available on the market.
• At least one sheet (two are drawn) of a second type 10.2 forms the plenum side 5 of the nozzle plate 3.
• These sheets 10.2 have a part of the same pattern of through holes as the sheets of the first type 10.1 and, instead of another part of this pattern, have them substantially rectangular through openings which extend parallel to the sheet length and whose width z. Ex. Corresponds to that of two rows of holes.
• the sheets of the second type 10.2 are preferably made of the same perforated sheet material as the sheets of the first type 10.1, wherein the rectangular openings are cut out and thus a part of the rows of holes is removed.
• FIGS. 3 and 4 show the nozzle plate 3 of the burner according to FIG. 1 from the flame side 6 (FIG. 3) and from the plenum side 5 (FIG. 4).
• the holes of the second type sheets 10.2 are shifted in the direction of the rows by a hole displacement d smaller than the hole diameter, so that the effective cross section of the respective nozzles is reduced.
• the nozzles of the bores aligned with the rectangular through holes have an effective cross section corresponding to the bore diameter.
• the nozzle rows with the larger cross-section can serve to feed the treatment flames, while the nozzles with the reduced cross-section of the feed can serve for smaller support flats necessary to support the larger treatment flames.
• the exemplary nozzle plate 3 shown in Figures 2 to 4 produces a flame band having two bands of two rows of treatment flames each, and on each side and between the bands a row of support flames.
• Flame bands of a wide variety of flame patterns and flames can be produced by stacking sheets of the first type 10.1 according to FIG. 2 with second type sheets 10.2, and these sheets of the second type have other hole patterns and rectangular holes, if appropriate from sheet to sheet, and / or. or have different shifts of these bore patterns, wherein the production of the nozzle plate 3 remains substantially the same and always simple.
• sheets with smaller holes can be used and arranged so that the smaller holes are aligned with the larger holes of the other sheets.
• a nozzle plate can also consist only of sheets of the first type, wherein all holes of all sheets can be completely or partially aligned with each other. Lidern a selection of sheets is provided with different bore displacements, an adjustment of the effective nozzle cross section is made possible in a simple manner, namely by a sheet with the appropriate displacement is selected and positioned on the plenum side of the nozzle plate.
• FIG. 5 shows a further exemplary embodiment of the gas burner according to the invention.
• the burner in turn has a burner body 1 and a nozzle plate 3, wherein the plates or plates 10 forming the nozzle plate 3 are aligned substantially parallel to the nozzle orientation and preferably parallel to the length of the burner body.
• the sheets 10 are shown enlarged in size, with Figure 6 showing part of the sheets 10 as exploded and Figure 7 showing part of the orifice plate 3, e.g. the stacked sheets 10, shows.
• Sheets of two different types (plates of a third type 10.3 and plates of a fourth type 10.4) are stacked alternately.
• the sheets of the third type 10.3 are comb-shaped with a toothed edge facing the flame side 6 of the nozzle plate 3, d. H. they have gaps 21 in this edge region between z. Ex. Rectangular teeth 22 on.
• the sheets of the fourth type 10.4 have a substantially rectangular shape with a straight edge to the flame side of the nozzle plate, which is aligned in the stack on the toothed edge of the sheets of the third type 10.3.
• each nozzle 4 is delimited on the flame side of the nozzle plate by two teeth 22 of a third type sheet 10.3 and by two adjacent sheets of the fourth type 10.4 and has a square or rectangular cross section. This means that the nozzles 4 are arranged in rows, wherein the nozzles of adjacent rows aligned with each other, or, as in the case of the nozzle plate 3 shown in Figures 5 and 7, may be shifted relative to each other.
• the delimiting walls of the nozzle are straight, i. the gas flow does not encounter any protruding edges within the actual nozzle.
• the staggering of the nozzles shown in Figs. 5 and 7 can be achieved with a plurality of comb-like sheets 10.3 (sheets of the third type) having equal gap / tooth patterns, the gap / tooth pattern of first such sheets 10.3 'being symmetrical and the sheets on both sides have a mark (eg Excerpt 50), and the gap / tooth pattern of second such sheets 10.3 "being displaced and thus asymmetric compared to the first sheets 10.3 ', and the sheets having only one mark on one side.”
• the sheets of the third type are stacked (with sheets of the of the fourth type) are arranged as follows: sheet metal 10.3 "(mark left) sheet 10.3 '- sheet metal 10.3" (mark right) - etc.
• stack can be z.
• the use of different stacking patterns also allows the production of rows with larger nozzles for the flame for flame treatment and with smaller nozzles for the support flame. This can also be achieved using third grade 10.3 sheets with different gap / tooth patterns.
• the sheets 10 for their alignment and attachment in the stack z.
• FIG. 8 is a cross-section through a further exemplary embodiment of the gas burner according to the invention.
• the burner in turn has a burner body 1 and a nozzle plate 3, wherein the nozzle plate 3 z.
• the burner plenum is divided into a central chamber 30.1 and two lateral chambers 30.2, the chambers extending along the length of the burner and each chamber having its own gas supply port (2.1, 2.2).
• the plenum parts 30.1 and 30.2 supplied gases G1 and G.2 may have a different pressure, so that the sprouted from the various chambers flames are of different sizes and z.
• the gases G1 and G.2 may also be different gases or gas mixtures.
• the gas G.2 may be a mixture of combustible gas and oxygen or air, and the gas Gl may additionally contain a precursor of a compound to be deposited on the substrate surface.
• the plenum chambers G.l, G.2 are not along the length but along the width of the torch body, i. There are different chambers along the length of the burner body, or along the width of a substrate web to be treated. If such chambers with processing gases z. For example, as described above, the web is processed differently across its width.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Materials Engineering (AREA)
• Physics & Mathematics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Plasma & Fusion (AREA)
• Gas Burners (AREA)
• Glass Melting And Manufacturing (AREA)
• Chemical Vapour Deposition (AREA)

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• 2009
  • 2009-01-20 CA CA2712497A patent/CA2712497C/en not_active Expired - Fee Related
  • 2009-01-20 BR BRPI0906568-7A patent/BRPI0906568A2/pt not_active IP Right Cessation
  • 2009-01-20 US US12/864,376 patent/US9004913B2/en not_active Expired - Fee Related
  • 2009-01-20 MX MX2010008176A patent/MX2010008176A/es active IP Right Grant
  • 2009-01-20 CN CN2009801112853A patent/CN102099627A/zh active Pending
  • 2009-01-20 WO PCT/CH2009/000021 patent/WO2009094791A2/de active Application Filing
  • 2009-01-20 RU RU2010134972/06A patent/RU2483247C2/ru not_active IP Right Cessation
  • 2009-01-20 JP JP2010543351A patent/JP5659022B2/ja not_active Expired - Fee Related
  • 2009-01-20 EP EP09705432A patent/EP2245371A2/de not_active Withdrawn

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