EP0914870A1 - Multiple substance spray nozzle with concentric spraying orifices - Google Patents

Abstract

The jet (10) has at least three flow channels (24, 26, 28) running from the inflow along a longitudinal axis (56) each to a mouth aperture (25, 27, 29). A channel (26) for spraying a liquid (SF) is surrounded on both sides by channels (24, 28) for spraying a gas. The channels (24, 26, 28) are directed outwards from the longitudinal axis in the region of their mouth apertures at an angle of up to 90 degrees .

Description

The invention relates to a multi-component atomizing nozzle with at least three concentrically arranged, from one inflow end along a longitudinal axis to each mouth opening extending flow channels, one channel for spraying a liquid on both sides of a channel for guiding one Gases is surrounded.

Such an atomizing nozzle is known from DE-PS 857 924.

In this atomizing nozzle there are annular flow channels provided by several concentrically nested Pipes are formed.

The flow channels taper in the area of the mouth opening radially inwards.

A flow channel for spraying a liquid is on both sides surrounded by channels for the passage of air. The radial inner air duct still flows into the liquid duct inside the nozzle, so that a mixture of these already in the nozzle takes place in both media. In the area of the nozzle orifice radially inner air duct arranged helically Baffles or vanes are provided to the airflow in addition impose a circular motion for axial movement. The nozzle mentioned at the beginning serves the atomized liquid at high speed in a standing cylindrical Spray dry room.

A widely used area of application for a multi-component atomizing nozzle according to the present application in being a particulate good with the one to be sprayed Treat liquid.

A treatment process is wise, a particulate one Easy to granulate. The goal is fine fine particles to agglomerate into larger particles. An area of application the pharmaceutical industry is for such granules, with the almost dust-fine particles to more manageable granulate particles should be agglomerated.

It is desirable to add granules that are as uniform as possible received, i.e. with a very narrow grain size distribution. For this it is necessary to make the liquid not only extremely fine but also to spray evenly into the smallest aerosol droplets, which then target the goods to be agglomerated Should, these aerosol droplets themselves if possible not during their free flight distance to larger liquid agglomerates should agglomerate.

With the nozzle mentioned above, in which the channels in Narrow the area of the mouth and mixes already in the nozzle take place, is such a defined fine spray not achievable.

In another area of application, namely coating, the sprayed liquid a superficial coating on the Form coated goods. The outcome of the treatment is crucial depends on how finely distributed the liquid is the nozzle emerges and how evenly distributed the sprayed Liquid can be applied to the material to be treated.

This is why there are nozzle assemblies in these areas of application developed as known for example from DE 41 10 127 A1 are. Linear gap channels are provided there. On both sides a central outlet channel for the liquid are slit-shaped Mouth openings are provided for a gaseous medium. By appropriately aligning these gas flows can be achieved that the liquid after it becomes the slit-shaped Has left the mouth opening, sprayed into a mist is not a long "wet" jet. Around the spray Conditioning even further is in some areas of application provided to provide further gas outlet openings, through which, for example, a specially conditioned air the spray is guided around, for which the technical term "Microclimate" has established. This microclimate ensures, for example that the spray does not dry prematurely, undesirably warmed or cooled but in the case too If the required consistency strikes the goods to be treated.

Intensive investigations have now shown that when used of multi-component atomizing nozzles with at least three concentric arranged flow channels, even if you look at the flow channels contrary to the aforementioned DE-PS 857 924 not tapered but flow out exactly linearly along the longitudinal axis leaves, already sprayed liquid particles before these hit one particle, another sprayed liquid particle meet and get together with this to a bigger one Mix particles. Now hit this larger liquid particle for another sprayed particle or even already on an agglomerated particle before it becomes a treatable one Good particles, relatively large liquid particles are formed, that negatively affect the treatment outcome.

It is therefore an object of the present invention to provide a multi-component atomizing nozzle to further develop that with This nozzle achieves a treatment result that is as uniform as possible can be.

According to the invention the object is achieved in that the channels in the area of its mouth opening from the longitudinal axis to the outside run away.

This constructive measure allows a spray cone to be sprayed Liquid particles can be achieved in which the Particles continuously from each other over a relatively long distance move away so there is a danger that already sprayed Liquid particles meet again and become larger Agglomerate liquid particles, is significantly reduced, so that a much more uniform treatment result can be achieved.

The advantages should be based on the enclosed sketches of the Figures 4 and 5 are explained at this point.

4 shows a straight-line pipe nozzle 64. The sprayed liquid particles occur axially Direction out of the mouth opening 66. After leaving the Mouth opening 66 can now the liquid particles in Distribute space, this distribution still through the bilateral the mouth 66 existing air gaps are controlled can.

If you look at the resulting spray cone after leaving the Mouth opening 66 after a spray height h1, and considered a radial section plane of the spray cone at a cone angle of 30 °, as indicated in Fig. 4 by the double arrow is, it can be seen that at this point the Mouth opening 66 leaked particles both radially after have spread inside as well as radially outwards.

Now consider the spray cone in a cross-sectional plane at height h1 from above, and take the section highlighted in gray it is found that in this section 15 Particle points can be seen. If you look at two neighboring ones Spray droplets 68 and 68 ', it is found that the radial inwardly moving particles 70 and 70 'approach each other have, so they are closer to each other than when leaving the mouth opening 66 was the case. Thus, in one particular Area cutout not only a relatively high particle density exist as such, but particles move towards each other, with the logical consequence that this meet at some point and become larger particles agglomerate.

Now go to Fig. 5, in which the mouth opening 72 from the The longitudinal axis of the straight tubular nozzle 64 is directed outwards, and you also look at the spray distance or spray height h1 again a corresponding surface section from above of the spray cone, which is underlined in gray in FIG. 5, it can be seen that there are only 9 particles left, thus the relative density of the particles to each other is lower is.

If one considers three neighboring ones emerging from the mouth opening 72 Liquid droplets 74, 74 'and 74' 'can be seen that all the sprayed particles move away from each other have, this also applies to the radially inner sprayed Particles 75, 75 'and 75' 'farther apart are as when they exit from the mouth opening 72.

It can be clearly seen that due to the design of the channels in the area of the mouth opening in that these run away from the longitudinal axis, after a certain defined distance h1 the individual sprayed particles have moved away from each other so that the danger of agglomeration of sprayed liquid particles is significantly reduced, so that a significantly better, namely more uniform treatment result can be achieved.

It is now possible to interact with the operating parameters the nozzle, i.e. the gap width of the pressure and the Flow rate of the media, a fine spray of sprayed To achieve liquid particles over a certain Distance after leaving the mouth opening move away from each other. This increases the likelihood that a particle sprayed under these conditions onto a Particulate material to be treated in this non-agglomerated Condition meets, significantly increased, what in the desired uniform and better treatment result results.

The philosophy of the invention is that the liquid ring gap in its spread parallel to the inside and concentrically to the outside of at least one gas cross section, is surrounded in particular parallel-concentric. The specific spray pattern resulting from the concerted action of these two different media (liquid and compressed air) distributed over a total of three cross sections, is by the Change in the total spread angle is not affected.

Circular channels were shown in the examples, they are oval or elliptical shapes are also possible. Furthermore, only certain circumferential sections of the channels are used, that is certain areas are closed or covered, what's on the principle of the invention has no influence.

The task is thus completely solved.

In a further embodiment of the invention, the channels run in the area of the mouth opening opposite the longitudinal axis angled up to 90 ° outwards.

This measure now allows in combination with the constructive Operating parameters a flexible adaptation to the treatment Good and the local conditions in the device, in which such a multi-component atomizing nozzle is installed. It it is obvious that at very small angles conditions are present, which come closer to the state shown in FIG. 4, with increasing angles, the parts overlap permanently move a very long flight away from each other. Thus, in the entire angular range up to 90 ° depending on the Circumstances can be varied.

In a further embodiment of the invention, the channels run in the area of the mouth opening opposite the longitudinal axis directed outwards at an angle of at least 15 °.

With this minimum angle there is a sufficient flight distance available to the liquid emerging from the orifice to spray at all, but at the same time to ensure that the desired result, namely moving away from each other of the sprayed parts up to a certain flight distance becomes.

In a further embodiment of the invention, the channels run at an angle in the range of 30 to 60 ° to the outside directed.

In this angular range are over a certain distance away, as is the case in common areas of application in granulation, Agglomeration and coating technology arise, excellent results to achieve.

In a further embodiment of the invention, there are further concentric ones Channels provided radially inside and / or radially arranged outside the at least three concentric channels are.

This known measure of the arrangement of the further channels has the advantage in connection with the invention that the Conditioning of the spray mist carried out by a "microclimate" can be, for example, to dry prematurely of a liquid adhesive sprayed during granulation prevent.

In a further embodiment of the invention, the channels as spaces between several coaxially pushed together Tubes trained.

This measure, which is also known per se, has a connection with the invention the significant advantage that very flexible can be reacted to the respective circumstances, and that in particular, a so-called scaling-up was carried out without any problems can be. Within certain operating sizes, i.e. gap width, Gap length and pressure, certain operating parameters the liquid feedthrough or the gas feedthrough can be varied. Beyond these limits, for example the liquid with too high pressure and with too high Throughput through the gap cannot be expressed Spray more or just a spray with a very long one "wet" tongue can be achieved. But are higher throughputs required, pipes with a much larger diameter can now be used are pushed into each other, the radial distance between the tubes but remains with each other, i.e. the gap width approximately remains the same, only the gap length due to the larger diameter Pipes extended, thus with the same Company sizes with constant spray characteristics higher throughputs are possible.

In a further embodiment of the invention are at the inflow end provided with connections chambers through which the Channels can be supplied with a medium.

This measure has the advantage that the flow channels through the chambers can be applied evenly.

In a further embodiment of the invention, the chambers are formed by radial expansion of the tubes.

This measure has the advantage that the chambers are constructive can be done very easily.

In a further embodiment of the invention, the chambers are provided with axially extending connections.

This measure has the advantage that overall slim rod-shaped Multi-substance atomizing nozzles result, for example inserted into corresponding cylindrical openings or can be inserted.

In a further embodiment of the invention, the chambers are provided with radially extending connections.

This configuration leads to short and compact designs, the radial inflow over the connections leads because of the presence of the chambers to an even distribution or flow to the axially extending flow channels.

In a further embodiment of the invention, they are radial extending connections in openings in the chamber walls can be used as a seal and each end in a specific chamber.

This measure has the advantage that even with several nested Simply pipe the radial connections through it be accomplished that these through openings in the tubes are passed radially sealing and then in the corresponding Chamber. This measure also leads to an easy Dismantled and therefore easy to clean multi-component nozzle.

In a further embodiment of the invention, the plurality radial connections added on a carrier that on the Nozzle body can be placed radially.

This measure has the advantage that compact modular designs are possible and thus flexible to different design Refinements can be adapted to the desired to achieve excellent treatment results.

In a further embodiment of the invention is the carrier can be clipped onto the nozzle body.

This measure has the advantage that the handling of the nozzle, be it when assembling or disassembling for cleaning purposes, is simple.

In a further embodiment of the invention, this is radial innermost and / or the radially outermost channel wall with perforations provided through which a passage of pressurized gaseous medium is made possible from this channel.

This measure has the advantage that through the perforations Cleaning effect can be achieved, which ultimately also is conducive to the better treatment result. Are the Perforations are provided on the radially outermost wall prevents particles from temporarily settling on the outer wall fix, which then capture more particles and as large ones Particles are torn off again and thereby the treatment result influence negatively.

If the perforations are provided on the innermost tube, if, for example, a powder is carried out through the innermost tube will be ensured that no attachments either and agglomerations as well as detachments from larger agglomerates can take place.

In a further embodiment of the invention, the sum is of the perforation cross sections up to 15% of the total area of the Canal wall.

This measure has the advantage that it is particularly cheap Cleaning effect can be achieved.

In a further embodiment of the invention, they are in the mouth area outward sections of the channels through trumpet-like widening of the tubes pushed together educated.

This measure has the advantage that the lateral deflection the longitudinal axis through structurally simple measures, namely by widening the tubes pushed into each other can be, which of course only up to a limited Angle can be executed according to true dimensions.

In a further embodiment of the invention, they are in the mouth area outward sections of the channels through appropriately shaped ring bodies formed on, in or can be plugged over the pipes.

This highly preferred measure now has the considerable advantage that the ring body can be prepared exactly and then only have to be plugged onto the pipe ends. It can of course then on the same tubular body different ring bodies, i.e. with different deflection angles, be put on. This is also a very good thing flexible modular design enables.

In a further embodiment of the invention, the ring bodies have radially extending spacers on the relative position determine exactly to an adjacent ring body.

This measure has the considerable advantage that the spacers the nested ring bodies exactly are positioned to each other, thus exactly defined outlet openings are present, resulting in precise atomization or spraying the media, thus also the treatment result is beneficial.

In a further embodiment of the invention, the tubes are on Incoming end attachable to a support body.

This measure has the advantage that simple assembly and easy disassembly for cleaning or retrofitting purposes is possible, with the corresponding in the carrier body Chambers created in connection with the attached pipes can be.

In a further embodiment of the invention, the carrier body Can be upgraded with adapters for nozzles with more than three channels.

The basic equipment of a multi-component nozzle is three flow channels, a channel for the liquid and the bilateral of which are arranged channels for the atomizing air. This can thus, for example, through four nested pipes. Should now additionally radially inner and / or radially outer Channels are provided, for example, the aforementioned Microclimate are created on the support body, on which the four base pipes are pushed on, only fittings postpone, in or on which then another if necessary inner or outer tube or both can be slid on to the additional radially inner or radially outer channels create. As a result, there is a flexible modular construction with few parts possible.

It is understood that the above and those below features to be explained not only in the specified Combinations, but also in other combinations or can be used alone, without the scope of the to leave the present invention.

The invention is illustrated below with the aid of a few selected exemplary embodiments in connection with the accompanying drawings described and explained in more detail.

Fig. 1

einen Längsschnitt eines ersten Ausführungsbeispiels einer Mehrstoffzerstäubungsdüse mit drei Kanälen;

Fig. 2

einen Schnitt längs der Linie II-II in Fig. 1;

Fig. 3

einen stark vergrößerte Darstellung des in Fig. 2 mit einem Kreis umrundeten Bereiches;

Fig. 4

eine prinzipielle Darstellung eines Sprühkegels, wie er bei ausschließlich in der Längsachse verlaufenden Kanälen entsteht;

Fig. 5

eine der Fig. 4 entsprechende Darstellung mit einer entsprechend der Erfindung nach außen weggerichteten Mündungsöffnung;

Fig. 6

einen der Fig. 1 vergleichbaren Schnitt dieser Mehrstoffdüse in aufgerüstetem Zustand mit vier Strömungskanälen;

Fig. 7

eine Explosionsdarstellung des Mündungsbereiches der Düse von Fig. 6;

Fig. 8

eine der Schnittdarstellung von Fig. 6 vergleichbare Darstellung eines weiteren Aufrüstzustandes der Düse von Fig. 1 mit fünf Strömungskanälen und mit Perforationen;

Fig. 9

eine ausschnittsweise stark vergrößerte Darstellung des Mündungsöffnungsbereiches der Düse von Fig. 8;

Fig. 10

einen Längsschnitt eines Einströmungsendes einer der Fig. 1 entsprechenden Düse mit axialen Anschlüssen;

Fig. 11

eine endseitige Draufsicht auf die Düse von Fig. 10;

Fig. 12

einen Schnitt eines Endabschnittes einer Düse entsprechend der Düse von Fig. 8 mit sechs ineinandergeschobenen Rohren mit axialer Anströmung;

Fig. 13

einen der Darstellung von Fig. 12 um 90° versetzten Teilschnitt; und

Fig. 14

eine rückwärtige Draufsicht auf das Ende der Düse von Fig. 12.

Show it:

Fig. 1

a longitudinal section of a first embodiment of a multi-substance atomizing nozzle with three channels;

Fig. 2

a section along the line II-II in Fig. 1;

Fig. 3

a greatly enlarged representation of the area circled in Figure 2 with a circle.

Fig. 4

a basic representation of a spray cone, as it arises with channels running exclusively in the longitudinal axis;

Fig. 5

4 a representation corresponding to FIG. 4 with a mouth opening directed outwards in accordance with the invention;

Fig. 6

1 comparable section of this multi-component nozzle in the upgraded state with four flow channels;

Fig. 7

an exploded view of the mouth region of the nozzle of Fig. 6;

Fig. 8

6 shows a representation of a further upgrade state of the nozzle of FIG. 1 with five flow channels and with perforations, comparable to the sectional representation of FIG. 6;

Fig. 9

a partially enlarged representation of the mouth opening area of the nozzle of Fig. 8;

Fig. 10

a longitudinal section of an inflow end of a nozzle corresponding to Figure 1 with axial connections.

Fig. 11

an end plan view of the nozzle of Fig. 10;

Fig. 12

a section of an end portion of a nozzle corresponding to the nozzle of Figure 8 with six nested tubes with axial flow.

Fig. 13

one of the representation of Figure 12 offset by 90 °. and

Fig. 14

a rear plan view of the end of the nozzle of Fig. 12th

A multi-substance atomizing nozzle shown in Figures 1 to 3 is provided with the reference number 10 in its entirety.

The nozzle 10 has a carrier body 12 on which four tubes 14, 16, 18 and 20 are placed coaxially.

The innermost, smallest diameter tube 14 is in a central, continuous bore in the Carrier body 12 inserted appropriately.

The tube 14 defines an inner central channel 22.

A larger-diameter pipe 16 is pushed over the pipe 14, attached to an inner ring flange of the support body 12 is.

The pipe 18 pushed over the pipe 16 engages over the outer one Side of the carrier body 12 approximately over half its length. The diameter-largest tube 20 lies over the entire outside of the Covering body 12 on this. Between innermost Tube 14 and the next radially outer tube 16 is a first annular channel 24 created in an opening 25 opens.

Between the tube 16 and the tube 18 is a second annular one Channel 26 created, which opens into an opening 27.

Between the tube 18 and the tube 20 is a third ring Channel 28 created, which opens into an opening 29.

To supply channels 24 and 28 with spray air SL is a radially attached first connecting piece 30 is provided.

The connecting piece 30 is through an opening 32 in the outermost Pipe 20 is inserted in a sealing manner and opens into an annular chamber 34. The annular chamber 34 is on the outside of the carrier body 12 recessed and is via openings 13 with the first channel 24 fluidically connected.

As is indicated by an arrow in FIG. 1, Spray air SL supplied via the first connection piece 30, distributed this, as indicated by flow arrows 31 is even on the two channels 24 and 28.

A second radial, parallel and at a distance from the first connection piece 30 arranged second connecting piece 36 is sufficient through an opening 38 in the outermost tube 20 and an opening 40 in the tube 18 underneath and ends in one second annular chamber 42, which is also on the outside of the carrier body 12 is left out.

The annular chamber 42 is connected to the second channel 26.

Is, as indicated in Fig. 1 by an arrow, to spraying liquid SF through the second connection piece 36 guided, this flows, as indicated by flow arrows 37 is, via the annular chamber 42 in the annular second Channel 26 and exits through its mouth opening 27.

Both connecting pieces 30 and 36 are held by a holder 44 which has side end flaps 45 which on lugs 46 the outside of the outer tube 20 can be clipped on, like that can be seen in particular from FIGS. 2 and 3.

The connecting pieces 30 and 36 are not specified here conical seals sealing and fitting in the openings 32 or 38 and 40 added in the corresponding tubes. When assembling or disassembling, only the End tabs 45 are clipped on or off from the nose, so that then the holder 44 together with the connecting piece 30 and 36 can be removed.

The annular mouth opening 27 from which the spray liquid SF emerges, is radially inward from the annular mouth opening 25, radially outside of the annular mouth opening 27 surrounded by the openings 25 and 27th the spray air SL escapes.

In accordance with the present invention, channels 24, 26 are and 28 in the region of their mouth openings 25, 27, 29 from the Longitudinal axis 56 of the nozzle 10 directed outwards, in the illustrated Embodiment by the angle α of about 22.5 °.

This deflection of the channels is achieved in that the mouth ends of the tubes 14, 16, 18 and 20 corresponding flared rings 48, 50, 52 and 54 attached are.

The closer structural design of these rings is related described and explained in more detail with FIG. 7.

The opening of the central channel 22 is through a Sealing plug 58 is closed by a rod 60 with a control knob 62 is connected at the inflow end.

If desired, the plug 58 can be removed and it can, for example, through the central channel 22 a solid or also process air of a circulation system of an apparatus, in of which the nozzle 10 is installed.

The achieved by the lateral deflection of the mouth opening Advantages were already in the introduction to the description in Described in connection with the schematic diagrams of Figures 4 and 5, so that in this regard to the corresponding passages the introduction to the description.

The nozzle 10 is easy to assemble and can be cleaned or Conversion purposes can be easily dismantled.

By selecting the expansion or shaping of the rings 48, 50, 52 and 54 can of course also use other spray angles than the angle α, i.e. so bigger or smaller, set become.

A nozzle 8 shown in Figures 6 and 7 is based on the nozzle 10 described above and represents a further upgrade stage the nozzle 10.

Therefore, the same parts that are already in connection with the Nozzle of Fig. 1 have been described with the same reference numerals Mistake.

From the sectional view of Fig. 6 it can be seen that there an identical carrier body 12 is present on which the four tubes 14, 16, 18 and 20 described above are applied.

A fitting piece 82 is attached to the rear end of the carrier body 12, namely in the depression in which the adjusting button 62 of Fig. 1 intervened. Via the outermost tube 20 of the previously assembly described is yet another tube 84th pushed, which engages over the fitting 82 and attached to this is.

Via an opening 86 in the tube 84 in the area of the fitting 82 is a third radially extending connection piece 88 scheduled.

This third connecting piece 88 opens into an annular chamber 90, which is recessed on the outside of the fitting 82, and stands with the fourth channel 92 between the tube 20 and the Pipe 84 in connection.

Via openings 100 in the fitting 82, one can pass through the third Connection piece 88 supplied gaseous medium, so-called Microclimate MK, both in the fourth channel 92 and in the enter inner central channel 22, as indicated by arrows 91 is indicated.

The innermost ring 48, which is inserted into the innermost tube 14 is, is now designed so that between the inside of the Ring 48 and the outside of the plug 58 another Mouth opening 95 arises through which a partial flow of Microclimates can leak. The other partial flow passes through the mouth opening 93.

In this embodiment, the one exiting via the channel 26 is Spray liquid radially inside and radially outside of spray air surrounded, this in turn is radially inside and radially outside microclimate emerging through the orifices 93 and 95 surround.

So that the connection piece 30 and 36 through the outermost tube 84th Corresponding openings 94 and 96 can be guided intended. A holder 98 carries all three connecting pieces 30, 36 and 88.

From Fig. 7 it can be seen that in the end regions of the nested Tubes 14, 16, 18, 20 and 84 each on the inside Paragraphs are ground in the corresponding Pieces of rings 48, 50, 52, 54 and 102 are inserted can. Radially distributed spacers 104, 104 ', 106, 106 ', 108 and 108' and correspondingly on the other rings ensure that the nested rings are exact are spaced from each other so that corresponding channels or corresponding mouth openings result. At least they are three or four spacers evenly distributed over the circumference 104, 104 ', 106, 106', 108, 108 'in the form of themselves axially extending ribs provided for the corresponding radial Care for distance, yet a passage of the media allow between the rings.

The exploded view of Fig. 7 shows the flexibility of the modular system can be seen particularly well.

Depending on the upgrade condition, the outermost tube 84 can be provided or be omitted, accordingly, only then corresponding ring 102 may be provided or omitted.

In addition, tubes can be designed in the same way 14, 16, 18, 20 rings with different widenings used so that channels result, which are more or less far out from the central central longitudinal axis run away.

The rings 48, 50, 52, 54 and 102 are high-quality turned parts Precision can be made from metal or composite materials.

8 shows a further stage of expansion of that described in FIGS. 1 and 6 Nozzles shown.

8, a fitting 82 is placed on the carrier body 12. Another adapter 112 is placed on adapter 82. In the innermost tube 14 is an even smaller diameter Tube 114 inserted that up to the further fitting 112 is sufficient and is mounted on the inside.

Thereby, between the tube 14 and the innermost tube 114 a fifth channel 116 created in an orifice 117 flows.

The fifth channel 116 is via the third connecting piece 88 microclimate, i.e. that of this connector 88 air supplied is partly in the outermost fourth Channel 92 and partly through the opening 100 of the fitting 82 passed into the innermost fifth channel 116, like that through Flow arrows 115 is indicated.

As can be seen from the sectional view of FIG. 8, the Sealing plug 122 is somewhat smaller, thus leaving one relatively large annular mouth opening 125 through which in the middle, for example, process air PL or a mixture of process air and a finely divided solid F (PL + F) passed through can be.

From the sectional view of Fig. 8 can also be seen that the innermost tube 116 is provided with perforations 118, so that from the fifth channel 116 microclimate medium through the perforations 118 can flow into the interior, like that through Arrows 119 is shown. As described above, a Solid F passed through the innermost tube 114, exists the danger of solid deposits on the inside of this tube 114. The perforations of the tube 114 result a constantly renewing film of air on the inner surface, who protects them and keeps them free from buildup.

It can also be seen from Fig. 8 that the outermost tube 84 is provided with perforations 120.

Microclimate medium can also be formed via the perforations 120 exit the fourth channel 92 to the outside, like that is indicated by flow arrows 121.

The perforations 120 have a cleaning effect on the Achieved outside of the nozzle.

If the nozzle 110 shown in FIG. 8 is used, for example, as an underbed nozzle inserted into a vortex chamber, so is its outside of the one swirled and treated in the vortex chamber Well and the process air flows around it, and it exists the possibility of particles on the outside of the outermost Tube 84 stick, especially in agglomeration processes, where a sticky spray liquid is sprayed. By the perforations 120 now achieve a self-cleaning effect, i.e. no particles can also adhere to the outside. Here, too, arises on the outer surface of the tube 84 continuously renewing air film covering the outside of the nozzle 110 holds free from attachments. This is particularly useful if a hot-melt coating is carried out with the nozzle 110 in which the coating substance is sprayed in the molten state becomes.

9 is a greatly enlarged sectional view of the Mouth opening area of the nozzle 110 shown in FIG. 8 evident. It can be seen that through the mouth opening 27 Spray air SF emerges. The annular mouth opening 27 is through on both sides, i.e. radially inside and radially outside surround the annular mouth openings 25 and 29 through which the spray air SL emerges, which has the task of the spray liquid Spray SF into fine aerosol droplets.

The annular mouth openings 25 and 29 are radially inside and radially outward through the annular orifices 117 and 93, through which the so-called microclimate MK emerges, mostly a conditioning gas stream that flows on both sides of the Spray mist surrounds and conditions this, for example Maintain temperature or the like.

Optionally or at the same time, it can still have the innermost ring-shaped Mouth opening 125 process air and possibly a solid F be passed through the nozzle. From the sectional view of Fig. 9 can also be seen that as precise turning parts trained rings 48, 50, 52, 54, 102 and 124 again respectively on the ends of tubes 14, 16, 18, 20, 84 and 114 are plugged in or inserted or inserted into these and that in the rib-like spacers not described here for exact positioning of the rings with each other is taken care of. This means that there are precisely defined muzzle opening conditions available through which the various media SF, SL, MK, PL + F under exactly manageable conditions can be sprayed through the nozzle.

In the previously described in connection with FIGS. 1 to 9 Embodiments or upgrade levels on nozzles was in each case a radial inflow takes place via the connecting piece.

10 and 11, an end portion 130 of a nozzle is shown, which corresponds to the expansion stage of the nozzle of Fig. 1.

That means there are four pipes 132, 134, 136 and 138 pushed together, the two outer tubes 136 and 138 being radial are expanded. Arise in the area of widening Annular chambers that have axially extending ports 140 or 142 are connected.

The connector 140 supplies one between the tubes 134 and 136 formed channel 146 with spray liquid SF.

Port 142 supplies both inner channel 144 between the tubes 132 and 134 as well as the outer channel 148 between pipes 136 and 138 with spray air SL, so that as related described with Fig. 1, the annular mouth exit opening 27 of the spray liquid both radially inside also radially outside with corresponding mouth openings 25 and 29 the spray air is surrounded.

12 to 14 is one of FIGS. 10 and 11 corresponding Construction for an expansion stage of a nozzle shown as it is described in Fig. 8, that is, a nozzle in the total six tubes are pushed together.

In addition to the tubes 132, 134, 136 shown in FIG. 10 and 138 is still an additional inner tube 152 and an outer one Tube 154 provided. The one between the innermost tube 152 and the pipe 132 resulting additional channel 158 is used for supplying microclimate.

The same applies to the outer channel 160, which between the outermost tube 154 and the radially closest inner tube 138.

These two outer channels 158 and 160 are through one third port 156 fed with microclimate, so here how described in connection with Fig. 8, the spray air channels, the the channel of the spray liquid radially inside and radially outside delimit, in turn radially inside and radially outside are surrounded by microclimate channels.

Thus, the end portion shown in Figs. 12 and 13 represents 150 a further upgrade stage of the end section shown in FIG. 10 130 represents.

Depending on the structural conditions, radial or axial connections for the flow channels may be provided.

Claims (20)

Multi-substance atomizing nozzle with at least three concentric arranged, from an inflow end along one Longitudinal axis (56) for each mouth opening (25, 27, 29, 93, 95, 117, 125) extending flow channels (22, 24, 26, 28, 92, 116), wherein a channel (26) for spraying a Liquid (SF) on both sides of one channel (24, 28) for guiding a gas (SL), characterized in that that the channels (24, 26, 28, 92, 116) in the area its mouth opening (25, 27, 29, 93, 95, 117, 125) run away from the longitudinal axis (56). Multi-substance atomizing nozzle according to claim 1, characterized in that the channels in the area of the mouth opening with respect to the longitudinal axis (56) at an angle up to Run 90 ° outwards. Multi-component atomizing nozzle according to claim 1 or 2, characterized characterized in that the channels at an angle of at least Run 15 ° outwards. Multi-component atomizing nozzle according to one of claims 1 to 3, characterized in that the channels at an angle run outward in the range of 30 ° to 60 °. Multi-component atomizing nozzle according to one of claims 1 to 4, characterized in that further concentric channels (92, 111) are provided radially inside and / or outside the at least three concentric channels (24, 26, 28) are arranged. Multi-component atomizing nozzle according to one of claims 1 to 5, characterized in that the channels (24, 26, 28, 92, 116) as spaces between several coaxially pushed together Tubes (14, 16, 18, 20, 84, 114) formed are. Multi-component atomizing nozzle according to one of claims 1 to 6, characterized in that at the inflow end with connections (30, 36, 88, 140, 142, 156) provided chambers (34, 36, 90) are provided, via which the channels a medium is feedable. Multi-substance atomizing nozzle according to claim 7, characterized in that that the chambers by radial expansion of the Tubes (136, 138, 154) are formed. Multi-substance atomizing nozzle according to claim 7 or 8, characterized characterized in that the chambers with axially extending Connections (140, 142, 156) are provided. Multi-substance atomizing nozzle according to claim 7 or 8, characterized characterized in that the chambers (34, 36, 90) with themselves radially extending connections (30, 36, 88) are provided. Multi-substance atomizing nozzle according to claim 10, characterized in that the radially extending connections (30, 36, 88) in openings (32, 38, 40) in the chamber walls are used sealingly, and that these are each in a certain chamber (34, 36, 90) open. Multi-component atomizing nozzle according to claim 10 or 11, characterized characterized in that the plurality of radial connections (30, 36, 88) are received on a holder (44, 98), which can be placed radially on the nozzle body. Multi-substance atomizing nozzle according to claim 12, characterized in that the holder (44, 88) on the nozzle body can be clipped on. Multi-component atomizing nozzle according to one of claims 1 to 13, characterized in that the radially innermost and / or the radially outermost channel wall with perforations (118, 120) is provided, through which a passage from below Pressurized gaseous medium (MK) from the corresponding Channel (92, 116) is enabled. Multi-substance atomizing nozzle according to claim 14, characterized in that the sum of the perforation cross sections is up to 15% of the total area of the duct wall. Multi-component atomizing nozzle according to one of claims 6 to 15, characterized in that in the mouth area outward-facing sections of the channels by trumpet-like Widening of the tubes pushed together are trained. Multi-component atomizing nozzle according to one of claims 6 to 15, characterized in that in the mouth area outward sections of the channels by corresponding shaped ring body (48, 50, 52, 54, 102, 124) are trained on, in or on the corresponding Pipes are pluggable. Multi-substance atomizing nozzle according to claim 17, characterized in that the ring body (48, 50, 52, 54, 102, 124) radially extending spacers (104, 104 ', 106, 106 ', 108, 108') which have the relative position determine exactly to an adjacent ring body. Multi-component atomizing nozzle according to one of claims 6 to 18, characterized in that the tubes at the inflow end can be plugged onto a carrier body (12). Multi-substance atomizing nozzle according to claim 19, characterized in that that the carrier body (12) through adapters (82, 112) upgradeable for nozzles with more than three channels is.

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